WO2022062607A1 - Battery, battery pack and electric vehicle - Google Patents

Battery, battery pack and electric vehicle Download PDF

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Publication number
WO2022062607A1
WO2022062607A1 PCT/CN2021/107069 CN2021107069W WO2022062607A1 WO 2022062607 A1 WO2022062607 A1 WO 2022062607A1 CN 2021107069 W CN2021107069 W CN 2021107069W WO 2022062607 A1 WO2022062607 A1 WO 2022062607A1
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WO
WIPO (PCT)
Prior art keywords
sampling
battery
pole core
line
battery according
Prior art date
Application number
PCT/CN2021/107069
Other languages
French (fr)
Chinese (zh)
Inventor
高健
胡世超
姜勇军
彭青波
鲁志佩
Original Assignee
比亚迪股份有限公司
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Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Publication of WO2022062607A1 publication Critical patent/WO2022062607A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, and in particular, to a battery, a battery pack and an electric vehicle.
  • the power battery pack needs to collect information such as the temperature and/or voltage of the battery during use to understand the current working condition of the battery and avoid potential safety hazards due to abnormal battery operation.
  • a common sampling structure in a battery pack is to arrange an FPC (Flexible Printed Circuit, flexible circuit board) on a battery module or a battery to collect battery-related information.
  • FPC Flexible Printed Circuit, flexible circuit board
  • a battery is provided, and the battery includes:
  • pole core string is arranged in the casing, the pole core string includes a packaging bag and a plurality of pole core groups connected in series, and the pole core group is packaged in the packaging bag;
  • sampling assembly the sampling assembly is arranged in the casing, the sampling assembly includes a circuit board and a plurality of sampling lines, the circuit board is provided with a plurality of first lines, and the first ends of the sampling lines correspond to The pole core group is electrically connected, and the second end of the sampling line is electrically connected with the corresponding first line; and,
  • the pin assembly includes a plurality of sampling pins, and the sampling pins are used to penetrate through the housing to electrically connect the corresponding first circuit and the battery information collector.
  • the circuit board is fixedly connected to the pin assembly.
  • a plurality of first pads and a plurality of second pads are further provided on the circuit board, and the first lines are connected between the corresponding first pads and the second pads , the second end of the sampling line is welded with the corresponding first pad, and the sampling pin is welded with the corresponding second pad.
  • the pin assembly further includes a mounting seat provided in the housing, and the mounting seat is sleeved on the plurality of sampling pins.
  • the battery further includes a ceramic sealing member, the plurality of sampling pins are fixed on the ceramic sealing member, and the ceramic sealing member is fixed on the housing.
  • the ceramic seal is provided with a plurality of through holes, and the sampling pins are correspondingly fixed in the corresponding through holes.
  • the battery further includes a connecting sleeve, and the ceramic sealing member is fixed on the casing through the connecting sleeve.
  • a groove is formed on the outer side of the casing, a sampling through hole is formed on the bottom wall of the groove, the connecting sleeve is fixed in the groove, and a plurality of the The sampling pin penetrates through the sampling through hole and the connecting sleeve, and the ceramic seal is fixed to an end of the connecting sleeve away from the casing.
  • the plurality of pole core groups in the pole core string are arranged along a first direction, and the first direction is the length direction of the battery, and the length of the battery is 400mm-2500mm.
  • the battery includes a plurality of pole core strings that are electrically connected to each other, and the plurality of pole core strings are arranged along a second direction, and the second direction is a thickness direction of the battery.
  • a second circuit is further provided on the circuit board, the sampling assembly further includes a signal acquisition element and a acquisition line, and the signal acquisition element is electrically connected to the second circuit through the acquisition line. connect.
  • the signal collection element is at least one of a temperature sensing element, a humidity sensing element, a pressure sensing element, and an odor sensing element.
  • At least one of the sampling line and the acquisition line is an FFC.
  • the casing includes a cover plate and a casing body having an opening, the cover plate closes the opening of the casing body to form a sealed accommodating cavity, and the pole core is serially connected to the casing body.
  • the accommodating cavity In the accommodating cavity; a plurality of the sampling pins are fixed and pass through the cover plate.
  • a second aspect of the present application provides a battery pack, including a battery information collector and the battery according to any one of the above, wherein the battery information collector is connected to the battery.
  • a third aspect of the present application provides an electric vehicle, including the battery pack described in any one of the above.
  • the battery of the present application is provided with a sampling assembly in the casing, and the sampling assembly includes a circuit board and a plurality of sampling lines, the circuit board is provided with a plurality of first lines, and the first ends of the sampling lines correspond to The pole core group is electrically connected, and the second end of the sampling line is electrically connected with the corresponding first line; in addition, the pin assembly includes a plurality of sampling pins, and the sampling pins are used to penetrate the housing to electrically connect the corresponding first lines With the battery information collector, the circuit board can sample each pole core group through the sampling line, and transmit the collected information to the battery information collector through the sampling pin, so as to understand the work of each pole core group inside the battery. state, which is conducive to improving the safety of battery use.
  • FIG. 1 is a schematic diagram of a connection between a battery and an information collector provided by an embodiment of the present application
  • Fig. 2 is the schematic diagram of omitting the shell body in Fig. 1;
  • FIG. 3 is an exploded view of a battery provided by an embodiment of the present application.
  • FIG. 4 is an exploded view of a partial structure of a battery provided by an embodiment of the present application.
  • FIG. 5 is a cross-sectional view of a partial structure of a battery provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a circuit board provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a pole core group packaged in the same packaging bag provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of an integrally formed packaging film forming a packaging bag according to an embodiment of the present application, wherein a concave is provided on one connecting part;
  • FIG. 9 is a schematic diagram of an integrally formed packaging film forming a packaging bag according to an embodiment of the present application, wherein two connecting parts are provided with dimples;
  • FIG. 10 is a schematic diagram illustrating that the pole core groups provided in the embodiment of the present application are packaged in a packaging bag in a one-to-one correspondence;
  • FIG. 11 is a schematic diagram of a battery pack provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of an electric vehicle provided by an embodiment of the present application.
  • pole core string 201, packaging bag; 202, pole core group; 203, pole core group main body; 204, first electrode lead-out part; 205, second electrode lead-out part; 206, packaging part; 207, connecting part; 208, sealed chamber; 209, packaging film; 210, pit; 211, first pole core group; 212, second pole core group;
  • sampling component 301, circuit board; 302, sampling line; 303, first circuit; 3031, first connection segment; 3032, second connection segment; 304, first pad; 305, second pad; 306 307, signal acquisition element; 308, acquisition line; 309, protection element; 310, first sampling line; 311, second sampling line;
  • the present application provides a battery 100 , which includes a housing 10 , a pole core string 20 , a sampling assembly 30 and a pin assembly 40 .
  • the pole core string 20 is disposed in the housing 10
  • the pole core string 20 includes a packaging bag 201 and a plurality of pole core groups 202 connected in series.
  • the pole core group 202 is packaged in the packaging bag 201 .
  • the sampling assembly 30 is arranged in the housing 10 , and the sampling assembly 30 includes a circuit board 301 and a plurality of sampling lines 302 .
  • the circuit board 301 is provided with a plurality of first lines 303 , and one end of the sampling line 302 is electrically connected to the corresponding pole core group 202 .
  • the pin assembly 40 includes a plurality of sampling pins 401 , and the sampling pins 401 are used to penetrate through the casing 10 to electrically connect the corresponding first circuit 303 and the battery information collector 200 .
  • sampling pins 401 penetrate through the housing 10 , the inner ends of the sampling pins 401 are connected to the corresponding first lines 303 , and the outer ends of the sampling pins 401 are connected to the battery information collector 200 .
  • the inner end of the sampling pin 401 refers to the end of the sampling pin 401 inside the housing 10
  • the outer end of the sampling pin 401 refers to the end of the sampling pin 401 outside the housing 10 .
  • the circuit board 301 may be a PCB board, and the first circuit 303 on the circuit board 301 may be, but not limited to, conductive metal foil, wire, or conductive metal plating.
  • the first circuit 303 may be disposed on the circuit board 301 by, but not limited to, bonding, welding, etching, injection molding, hot pressing, electroplating, electroless plating, and the like.
  • a sampling assembly 30 is disposed in the casing 10 , and the sampling assembly 30 includes a circuit board 301 and a plurality of sampling lines 302 , and a plurality of first lines 303 are disposed on the circuit board 301 .
  • the end is electrically connected to the corresponding pole core group 202, and the second end of the sampling line 302 is electrically connected to the corresponding first line 303; in addition, the pin assembly 40 includes a plurality of sampling pins 401, and the sampling pins 401 are used to penetrate the shell
  • the body 10 is electrically connected to the corresponding first circuit 303 and the battery information collector 200, so that the circuit board 301 can sample each pole core group 202 through the sampling line 302, and the collected information (for example, through the sampling pin 401) voltage and/or current) to the battery information collector 200 , so as to understand the working status of each pole core group 202 inside the battery 100 , which is beneficial to improve the safety of the battery 100 in use.
  • the pole core group 202 includes a pole core group main body 203 and a first electrode lead-out part 204 and a second electrode lead-out part 205 for drawing current, for connecting the first electrodes of the two pole core groups 202 in series
  • the lead-out part 204 and the second electrode lead-out part 205 can be electrically connected to the first end of the same sampling line 302 , and are not used to connect the first electrode lead-out part 204 of the two pole core groups 202 in series with the first end of one sampling line 302 .
  • the terminals are electrically connected, and the second electrode lead-out part 205 that is not used for connecting the two pole core assemblies 202 in series is electrically connected to the first terminal of the other sampling line 302 .
  • the number of sampling lines 302 can be reduced, which is beneficial to saving costs.
  • first electrode lead-out member 204 of each pole core group 202 may be electrically connected to the first end of the corresponding sampling line 302 respectively, and the second electrode of each pole core group 202
  • the lead-out parts 205 are respectively electrically connected to the first ends of the corresponding sampling lines 302; alternatively, the first electrode lead-out parts 204 of a plurality of pole core groups 202 can be respectively electrically connected to the first ends of the corresponding sampling lines 302,
  • the second electrode lead-out parts 205 of the plurality of pole core groups 202 are respectively electrically connected to the first ends of the corresponding sampling lines 302 .
  • the pole core string 20 includes two pole core groups 202 .
  • the two pole core groups 202 are a first pole core group 211 and a second pole core group 212 respectively.
  • the first electrode of the first pole core group 211 The lead-out part 204 is electrically connected to the first end of the first sampling line 310
  • the second electrode lead-out part 205 of the first pole core group 211 and the first electrode lead-out part 204 of the second pole core group 212 are connected to the same second sampling line
  • the first end of 311 is electrically connected.
  • sampling lines 302 and the first lines 303 may be set in a one-to-one correspondence; the first lines 303 and the sampling pins 401 may be set in a one-to-one correspondence.
  • the pole core group 202 may be composed of a single pole core, or may include at least two pole cores, and at least two pole cores are connected in parallel to form the pole core group 202 .
  • the pole core group 202 may be composed of a single pole core, or may include at least two pole cores, and at least two pole cores are connected in parallel to form the pole core group 202 .
  • two pole cores are connected in parallel to form the pole core group 202
  • three pole cores are connected in parallel to form the pole core group 202 .
  • pole core group 202 contains one pole core
  • one of the first electrode lead-out part 204 and the second electrode lead-out part 205 is a positive electrode lug, and the other is a negative electrode lug
  • the pole core group 202 contains a plurality of pole cores
  • the first electrode One of the lead-out part 204 and the second electrode lead-out part 205 is a composite tab formed by combining the positive tabs of a plurality of pole cores and welding together, and the other is a composite tab formed by combining and welding the negative tabs of a plurality of pole cores together.
  • Pole ear Pole ear.
  • the pole core mentioned is the pole core commonly used in the field of power battery 100
  • the pole core and the pole core group 202 are the internal components of the battery 100, and cannot be understood as the battery 100 itself;
  • the obtained battery 100 is an independent unit battery 100, and it cannot be simply understood as a battery module or a battery pack because it contains multiple pole cores.
  • the pole core in this application may be a pole core formed by winding, or a pole core made by lamination; generally, the pole core includes at least a positive electrode sheet, a separator and a negative electrode sheet.
  • the battery 100 in the present application can be a liquid battery, that is, the electrode core contains an electrolyte, or it can be a solid-state battery, and the electrode core contains a solid electrolyte or a gel polymer electrolyte.
  • the casing 10 is a metal casing, and the pole core string 20 is packaged in the casing 10 .
  • the double sealing effect of the packaging bag 201 and the case 10 is beneficial to improve the sealing performance of the battery 100 .
  • the casing 10 includes a cover plate 101 and a casing body 102 having an opening 103 , and the cover plate 101 closes the opening 103 of the casing body 102 to form a sealed accommodating cavity 104 ,
  • the pole core string 20 is arranged in the accommodating cavity 104 ; a plurality of sampling pins 401 are fixed and penetrate through the cover plate 101 .
  • both ends of the housing body 102 along the first direction have openings 103 , two cover plates 101 are provided, each cover plate 101 closes the corresponding opening 103 , and a plurality of sampling pins 401 are fixed and penetrate through the same one Cover plate 101 .
  • the first direction is the length direction of the battery. As shown in FIG. 3 , the first direction is the X direction in the drawing.
  • the circuit board 301 is fixedly connected to the pin assembly 40 .
  • the circuit board 301 can also be fixed on the inner wall of the casing 10 .
  • a plurality of first pads 304 and a plurality of second pads 305 are further provided on the circuit board 301 , and the first lines 303 are connected to corresponding first pads 304 .
  • the second end of the sampling line 302 is welded to the corresponding first pad 304
  • the sampling pin 401 is welded to the corresponding second pad 305 .
  • the sampling lines 302 are in one-to-one correspondence with the first pads 304
  • the sampling pins 401 are in one-to-one correspondence with the second pads 305 .
  • the first pad 304 is a surface-mount pad, that is, the first pad 304 is in the shape of a sheet, and the second end of the sampling line 302 can be soldered on the surface of the corresponding first pad 304 to be compatible with the surface of the first pad 304 .
  • the corresponding first lines 303 are electrically connected.
  • the second pad 305 can be a socket pad, that is, a socket is provided in the second pad 305, and the sampling pin 401 can be inserted and welded in the socket, so as to communicate with the corresponding second pad 305 through the corresponding second pad 305.
  • the first line 303 is electrically connected.
  • first pad 304 can also be a socket pad
  • second pad 305 can also be a surface mount pad.
  • the first pad 304 and the second pad 305 may be the same or different, and the specific forms of the first pad 304 and the second pad 305 are not specifically limited in this application.
  • circuit board 301 can also be fixedly connected to the pin assembly 40 by means of riveting, bonding, injection molding, or hot pressing.
  • the pin assembly 40 further includes a mounting seat 402 provided in the housing 10 , and the mounting seat 402 is sleeved on the plurality of sampling pins 401 . It can be understood that the sampling pins 401 can be installed on the mounting seat 402 first during assembly, so as to facilitate the connection and fixation of each sampling pin 401 and the circuit board 301 .
  • the mounting seat 402 is provided with a plurality of mounting holes 403 , and the sampling pins 401 are correspondingly fixed in the mounting holes 403 .
  • both the inner end and the outer end of the sampling pin 401 extend out of the installation hole 403 .
  • connection between the mounting seat 402 and the sampling pin 401 may be, but not limited to, interference fit, bonding, welding, injection molding, or hot pressing.
  • the sampling pins 401 can be fixed in the installation holes 403 in a one-to-one correspondence.
  • a plurality of sampling pins 401 may also be fixed in one mounting hole 403, and in this case, the sampling pins 401 need to be insulated from each other.
  • the battery 100 further includes a ceramic seal 50 , a plurality of sampling pins 401 are fixed on the ceramic seal 50 , and the ceramic seal 50 is fixed on the case 10 . That is, the plurality of sampling pins 401 are fixed on the housing 10 through the ceramic seal 50 .
  • the ceramic seal 50 can effectively ensure the sealing performance of the connection between the sampling pin 401 and the housing 10 .
  • the ceramic seal 50 is fixed on the cover plate 101 .
  • the ceramic seal 50 is provided with a plurality of through holes 501 , and the sampling pins 401 are fixed in the corresponding through holes 501 .
  • the sampling pins 401 can be fixed in the through holes 501 in a one-to-one correspondence; of course, a plurality of sampling pins 401 can also be fixed in one through hole 501, and the sampling pins 401 need to be insulated from each other.
  • the manner in which the sampling pin 401 is fixed in the through hole 501 may be, but not limited to, welding, interference fit, bonding, and the like.
  • the sampling pin 401 can be fixed in the through hole 501 by soldering.
  • the battery 100 further includes a connecting sleeve 60 , and the ceramic sealing member 50 is fixed on the casing 10 through the connecting sleeve 60 .
  • the ceramic seal 50 is fixed on the cover plate 101 through the connecting sleeve 60 .
  • connection method between the connection sleeve 60 and the housing 10 and the connection sleeve 60 and the ceramic seal 50 may be, but not limited to, welding, interference fit, and bonding.
  • the connecting sleeve 60 is fixed on the housing 10 by laser welding, and the ceramic sealing member 50 is fixed on the connecting sleeve 60 by brazing.
  • a groove 105 is provided on the outer side of the housing 10
  • a sampling through hole 106 is provided on the bottom wall of the groove 105
  • the connecting sleeve 60 is fixed in the groove 105
  • the sampling plug is inserted into the groove 105 .
  • the needle 401 penetrates through the sampling through hole 106 and the connection sleeve 60
  • the ceramic seal 50 is fixed to the end of the connection sleeve 60 away from the housing 10 .
  • the outer side of the casing 10 refers to the side of the casing 10 facing away from the accommodating cavity 104 .
  • connection sleeve 60 By fixing the connection sleeve 60 in the groove 105 , the external space occupied by the connection sleeve 60 can be reduced, which is beneficial to reduce the size of the battery 100 .
  • the outer side of the cover plate 101 is provided with a groove 105 , and the ceramic seal 50 is fixed to the end of the connection sleeve 60 away from the cover plate 101 .
  • the battery 100 further includes an insulating member 70 .
  • the insulating member 70 is disposed between the cover plate 101 and the circuit board 301 .
  • the insulating member 70 is provided with an escape hole 701 , and the escape hole 701 is used to avoid a plurality of Sampling pin 401.
  • the circuit board 301 is further provided with a second circuit 306
  • the sampling assembly 30 further includes a signal acquisition element 307 and an acquisition line 308 , and the signal acquisition element 307 communicates with the second circuit through the acquisition line 308 .
  • 306 Electrical connection As shown in FIG. 3 , FIG. 4 and FIG. 6 , the circuit board 301 is further provided with a second circuit 306 , and the sampling assembly 30 further includes a signal acquisition element 307 and an acquisition line 308 , and the signal acquisition element 307 communicates with the second circuit through the acquisition line 308 . 306 Electrical connection.
  • the second circuit 306 on the circuit board 301 may be, but not limited to, conductive metal foil, wire or conductive metal plating.
  • the second circuit 306 may be disposed on the circuit board 301 by, but not limited to, bonding, welding, etching, injection molding, hot pressing, electroplating, electroless plating, and the like.
  • the second line 306 and the first line 303 may be the same or different, which are not specifically limited in this application.
  • the signal acquisition element 307 is at least one of a temperature sensing element, a humidity sensing element, a pressure sensing element, and an odor sensing element. It can be understood that the signal collecting element 307 may be in contact with the pole core group 202 or not in contact with the pole core group 202 . This is not specifically limited in this application.
  • the signal collecting element 307 may be attached to the electrode core group main body 203 or the first electrode lead-out part 204 or the second electrode lead-out part 205 or the connecting piece.
  • the pin assembly 40 further includes a collection pin 404 , the collection pin 404 is electrically connected to the second circuit 306 , and the collection pin 404 penetrates through the housing 10 for It is electrically connected to the battery information collector 200 .
  • the structures of the acquisition pin 404 and the sampling pin 401 may be the same or different, and the connection method between the acquisition pin 404 and the second line 306 may be the same as that of the sampling pin 401 and the first line 303, and the acquisition
  • the connection between the pin 404 and the mounting seat 402 , the ceramic seal 50 and the housing 10 can be the same as the connection between the sampling pin 401 and the mounting seat 402 , the ceramic seal 50 and the housing 10 , which is not repeated here.
  • At least one of the sampling line 302 and the acquisition line 308 is FFC (Flexible Flat Cable). With this arrangement, the manufacturing process of the FFC is relatively simple, which is beneficial to reduce costs.
  • at least one of the sampling line 302 and the sampling line 308 can also be a wire.
  • the sampling assembly 30 further includes a plurality of protection components 309 , and the second end of the sampling line 302 is electrically connected to the corresponding first line 303 through the corresponding protection component 309 .
  • the sampling lines 302 , the protection components 309 , and the first lines 303 are arranged in a one-to-one correspondence.
  • the protection component 309 is a fuse.
  • the protection element 309 can also be a conductive sheet, and the conductive sheet is provided with a weak area; or, the protection element 309 can also be a protection structure formed by its own circuit structure. When the current of the circuit inside the battery 100 exceeds the threshold, the protection component 309 can play the role of overcurrent protection, thereby improving the safety of the battery 100 in use.
  • the fuse may be a serpentine fuse or a chip fuse.
  • the fuse and the corresponding first circuit 303 are integrally formed; for example, the fuse and the first circuit 303 are integrally formed on the circuit board 301 by etching. Alternatively, the fuse is integrally formed with the corresponding sampling line 302 .
  • the integration of the fuse and the first circuit 303 is beneficial to reduce the number of structural parts and to simplify assembly.
  • the first line 303 includes a first connection section 3031 and a second connection section 3032 , and the protection element 309 is connected to the first connection section 3031 and the second connection section 3032 of the corresponding first line 303 .
  • the second end of the sampling line 302 is connected to the first connection section 3031 of the corresponding first line 303 . That is, the second end of the sampling line 302 is connected to the corresponding protection component 309 through the first connecting section 3031 of the corresponding first line 303 , and the second connecting section 3032 of the first line 303 is connected to the corresponding sampling pin 401 connect.
  • the fuse is connected between the first connection segment 3031 and the second connection segment 3032 of the corresponding first line 303 , and the fuse, the first connection segment 3031 and the second connection segment 3032 of the first line 303 are integrated forming.
  • the plurality of pole core groups 202 in the pole core string 20 are arranged along a first direction, the first direction being the length direction of the battery 100 , and the length of the battery 100 is 400mm-2500mm.
  • the plurality of pole core groups 202 in the pole core string 20 may also be arranged along the second direction, and the second direction is the thickness direction of the battery 100 .
  • the first direction is the X direction in the figure
  • the second direction is the Y direction in the figure.
  • the battery 100 includes a plurality of pole core strings 20 that are electrically connected to each other, and the plurality of pole core strings 20 are arranged along a second direction, which is the thickness direction of the battery 100 .
  • the second direction can also be the length direction of the battery 100 .
  • the number of pole core strings 20 contained in the battery 100 can be set according to actual needs, and the number of pole core groups 202 contained in each pole core string 20 can be the same or different, and can be set according to actual needs. .
  • the pole core strings 20 may be connected in parallel, in series, or in a mixed connection. As for the specific connection, it can be set according to actual needs.
  • pole core strings 20 are connected in series.
  • the two pole core groups 202 located at the same end of the pole core string 20 in the longitudinal direction of the two adjacent pole core strings 20 are connected in series.
  • the length of the pole core strings 20 extends along the first direction, and such arrangement can make the electrical connection paths between the pole core strings 20 relatively short, which is beneficial to reduce the internal resistance.
  • the battery 100 includes two pole core strings 20 connected in series, each pole core string 20 includes two pole core groups 202 , and two pole core groups 202 located at the same end in the first direction in the two pole core strings 20 are connected in series connection, that is, the bipolar core group 202 located at the rearmost end of the bipolar core string 20 in FIG. 2 is connected in series.
  • the pole core string 20 includes one packaging bag 201, and the plurality of pole core groups 202 included in the corresponding pole core string 20 are packaged in the same packaging bag 201;
  • the pole core group 202 includes a pole core group main body 203 and a first electrode lead-out part 204 and a second electrode lead-out part 205 for extracting current, which are used to connect the first electrode lead-out part 204 and the second electrode lead-out part 204 of the two pole core groups 202 in series.
  • the connection point of the electrode lead-out part 205 is located in the packaging bag 201 .
  • a packaging portion 206 is formed in the packaging bag 201 relative to the first electrode lead-out part 204 and/or the second electrode lead-out part 205 to isolate two adjacent pole core group bodies 203; At least one of the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 is located in the encapsulation part 206 , and the first electrode of the sampling line 302 The end can extend into the package part 206 to be connected with the first electrode lead-out part 204 or the second electrode lead-out part 205 .
  • a through hole may be provided in the encapsulation part 206 , and the first end of the sampling wire 302 may be connected to the first electrode lead-out part 204 or the second electrode lead-out part 205 through the through hole.
  • part of the sampling line 302 may be embedded in the package part 206 first, and one end of the sampling line 302 may be connected to the first electrode lead-out part 204 or the second electrode lead-out part 205 .
  • the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 of the two pole core groups 202 connected in series are connected through a connecting piece.
  • the chip is located in the encapsulation part 206, and the first end of the sampling wire 302 can extend into the encapsulation part 206 to be connected with the connecting chip.
  • connection between the first end of the sampling wire 302 and the first electrode lead-out part 204 or the second electrode lead-out part 205 or the connecting piece may be welding, riveting, bonding or the like.
  • ultrasonic welding may be employed.
  • the encapsulation portion 206 can be formed in but not limited to the following ways:
  • the packaging bag 201 includes two connecting parts 207 arranged opposite to each other, the packaging bag 201 has an inner space, and the two connecting parts 207 are joined at preset positions to connect the packaging bag 201
  • the inner space is divided into a plurality of sealed chambers 208 , and a pole core group 202 is arranged in the sealed chambers 208 .
  • the above-mentioned “preset position” can be understood as the space between two adjacent pole core group bodies 203 and the outer edges of the two connecting portions 207 .
  • the packaging portion 206 can be formed by joining the two connecting portions 207 at the interval between two adjacent pole core group bodies 203 .
  • the packaging bag 201 is formed by folding the integrally formed packaging film 209 in half along a predetermined folding line, and the portions of the packaging film 209 located on both sides of the folding line are the two connecting portions 207 .
  • the packaging bag 201 is formed by folding a piece of packaging film 209 in half, and the bonding process between the two connecting parts 207 can be omitted, thereby saving process and manufacturing costs.
  • the two connecting portions 207 are two encapsulation films 209 . That is, the packaging bag 201 includes two packaging films 209 disposed opposite to each other, and each packaging film 209 is a connecting portion 207 .
  • the cavity wall of the sealing chamber 208 includes two side walls disposed opposite to each other along the second direction, and at least one side wall of at least one sealing chamber 208 is recessed to the outside of the packaging bag 201 to form a recess 210, the recess The pit 210 is used to accommodate the pole core group 202 .
  • the second direction is the thickness direction of the battery 100 .
  • the two connecting parts 207 constitute two side walls of the sealed chamber 208 that are oppositely arranged along the second direction, and at least one connecting part 207 is recessed to the outside of the packaging bag 201 to form a recess 210 , and the recess 210 may be
  • the pole core group 202 provides a receiving space.
  • the dimples 210 formed on the two connecting parts 207 may be arranged opposite to each other, or may be arranged at intervals.
  • the specific manner in which the two connecting parts 207 are joined at the preset position is not limited, and the two connecting parts 207 can be tied together at the joining position by a cable tie.
  • the two connecting portions 207 are thermally fused at predetermined locations. That is, the bonding position of the connecting portion 207 can be heated and melted, and then pressed together, without other parts, the interior of the packaging bag 201 can be divided into a plurality of sealed chambers 208, and the preparation process is relatively simple.
  • the packaging bag 201 is not additionally provided with a liquid injection port, and the electrolyte can be injected before the two connecting parts 207 are completely joined.
  • an additional liquid injection port may also be provided on the packaging bag 201, and after the two connecting portions 207 are joined at the preset positions, the electrolyte is injected through the separately provided liquid injection port.
  • connection between the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 of the two pole core groups 202 connected in series is embedded in the two pole core groups 202 in series.
  • the joint position corresponding to the connecting portion 207 That is, the connection between the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 in the two pole core groups 202 connected in series is embedded in the corresponding package part 206 Inside.
  • a plurality of pole core groups 202 can be connected in series first, and then a whole encapsulation film 209 can be used to wrap the series connected pole core groups 202 .
  • a plurality of pole core groups 202 are placed on a part of the encapsulation film 209 (or a plurality of dimples 210 can be opened on a part of the encapsulation film 209 in advance, and then a plurality of pole core groups 202 connected in series are placed in the corresponding dimples.
  • the two connecting parts 207 are relatively positioned with the first electrode lead-out part 204 and/or the second electrode lead-out part 205 to isolate the two adjacent pole core group bodies 203, and the two adjacent pole core groups 202 At least one of the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 is located at the engaging position.
  • the main bodies 203 of the plurality of pole core groups can be isolated to prevent the electrolytes of the plurality of pole core groups 202 from circulating each other, the plurality of pole core groups 202 will not affect each other, and the The electrolyte in 202 will not be decomposed due to excessive potential difference, so as to ensure the safety and service life of the battery 100 .
  • the pole core string 20 includes a plurality of packaging bags 201 , the pole core groups 202 are packaged in the packaging bags 201 in a one-to-one correspondence, and the pole core group 202 includes a first electrode lead-out part 204 and a second Two electrode lead-out parts 205 , at least one of the first electrode lead-out part 204 and the second electrode lead-out part 205 of the pole core group 202 extends out of the packaging bag 201 .
  • the first electrode lead-out part 204 of one pole core group 202 is connected to the second electrode lead-out part 205 of the other pole core group 202, and the first end of the sampling line 302 is connected to the first electrode Parts of the lead-out member 204 or the second electrode lead-out member 205 outside the packaging bag 201 are connected.
  • the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 of the two pole core groups 202 connected in series pass through the outside of the packaging bag 201
  • the first end of the sampling line 302 is connected to the connecting piece.
  • the material of the packaging bag 201 may be PET (Polyethylene terephthalate, polyethylene terephthalate), polypropylene composite film or aluminum plastic film.
  • a battery pack 300 which includes a battery information collector 200 and the above-mentioned battery 100 , and the battery information collector 200 is electrically connected to the battery 100 .
  • the sampling assembly 30 and the pin assembly 40 are arranged in the casing 10 , and the circuit board 301 in the sampling assembly 30 can conduct the sampling line 302 for each pole core group 202 . sampling, and transmit the collected information to the battery information collector 200 through the sampling pins 401 in the pin assembly 40, so as to understand the working status of each pole core group 202 inside the battery 100, which is beneficial to improve the safety of the battery 100. performance, thereby improving the safety of the battery pack 300 .
  • the present application further provides an electric vehicle 400 , which includes a vehicle body and the above-mentioned battery pack 300 , and the battery pack 300 is fixed on the vehicle body by passing through.
  • the battery pack 300 therein has higher safety, so that the electric vehicle has higher safety in use.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.

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Abstract

A battery (100), a battery pack (300) and an electric vehicle (400). The battery pack (300) comprises a housing (10), a pole core string (20), a sampling assembly (30) and a pin assembly (40). The pole core string (20) is arranged in the housing (10), and the pole core string (20) comprises an encapsulation bag (201) and a plurality of series-connected pole core groups (202), the pole core groups (202) being encapsulated in the encapsulation bag (201). The sampling assembly (30) is provided in the housing (10), and the sampling assembly (30) comprises a circuit board (301) and a plurality of sampling lines (302), the circuit board (301) being provided with a plurality of first circuits (303), one end of each sampling line (302) being electrically connected to a corresponding pole core group (202), and a second end of each sampling line (302) being electrically connected to a corresponding first circuit (303).

Description

一种电池、电池包和电动车A battery, battery pack and electric vehicle
相关申请的交叉引用CROSS-REFERENCE TO RELATED APPLICATIONS
本申请要求比亚迪股份有限公司于2020-09-27提交的、发明名称为“一种电池、电池包和电动车”的、中国专利申请号“202011030379.2”的优先权。This application claims the priority of the Chinese patent application number "202011030379.2" filed by BYD Co., Ltd. on 2020-09-27 with the invention title "A battery, battery pack and electric vehicle".
技术领域technical field
本申请涉及电池领域，尤其涉及一种电池、电池包和电动车。The present application relates to the field of batteries, and in particular, to a battery, a battery pack and an electric vehicle.
背景技术Background technique
动力电池包在使用过程中需要采集电池的温度和/或电压等信息，以了解电池当前的工作状况，避免因电池异常工作而导致出现安全隐患。目前，在电池包中比较常见的采样结构为在电池模组或电池上布置FPC(Flexible Printed Circuit，柔性电路板)以采集电池的相关信息。The power battery pack needs to collect information such as the temperature and/or voltage of the battery during use to understand the current working condition of the battery and avoid potential safety hazards due to abnormal battery operation. At present, a common sampling structure in a battery pack is to arrange an FPC (Flexible Printed Circuit, flexible circuit board) on a battery module or a battery to collect battery-related information.
相关技术中，为了提高电池的电压，通常会在电池内部设置多个串联的极芯，但是上述的采样结构无法对电池内部的各个极芯进行采样，进而也不能了解各个极芯的工作状态。In the related art, in order to increase the voltage of the battery, a plurality of pole cores connected in series are usually arranged inside the battery, but the above sampling structure cannot sample each pole core inside the battery, and thus cannot know the working state of each pole core.
发明内容SUMMARY OF THE INVENTION
本申请内容旨在解决现有的采样结构无法对电池内部的各个极芯进行采样的技术问题，为此，在本申请的第一个方面，提供一种电池，所述电池包括：The purpose of the present application is to solve the technical problem that the existing sampling structure cannot sample each pole core inside the battery. Therefore, in the first aspect of the present application, a battery is provided, and the battery includes:
壳体；case;
极芯串，所述极芯串设于所述壳体内，所述极芯串包括封装袋及多个串联的极芯组，所述极芯组封装于所述封装袋内；a pole core string, the pole core string is arranged in the casing, the pole core string includes a packaging bag and a plurality of pole core groups connected in series, and the pole core group is packaged in the packaging bag;
采样组件，所述采样组件设于所述壳体内，所述采样组件包括电路板及多个采样线，所述电路板上设有多个第一线路，所述采样线的第一端与对应的所述极芯组电连接，所述采样线的第二端与对应的所述第一线路电连接；以及，A sampling assembly, the sampling assembly is arranged in the casing, the sampling assembly includes a circuit board and a plurality of sampling lines, the circuit board is provided with a plurality of first lines, and the first ends of the sampling lines correspond to The pole core group is electrically connected, and the second end of the sampling line is electrically connected with the corresponding first line; and,
插针组件，所述插针组件包括多个采样插针，所述采样插针用于贯穿于所述壳体以电连接对应的第一线路与电池信息采集器。The pin assembly includes a plurality of sampling pins, and the sampling pins are used to penetrate through the housing to electrically connect the corresponding first circuit and the battery information collector.
本申请的一些实施例中，所述电路板与所述插针组件固定连接。In some embodiments of the present application, the circuit board is fixedly connected to the pin assembly.
本申请的一些实施例中，所述电路板上还设有多个第一焊盘和多个第二焊盘，所述第一线路连接于对应的第一焊盘和第二焊盘之间，所述采样线的第二端与对应的第一焊盘焊接，所述采样插针与对应的第二焊盘焊接。In some embodiments of the present application, a plurality of first pads and a plurality of second pads are further provided on the circuit board, and the first lines are connected between the corresponding first pads and the second pads , the second end of the sampling line is welded with the corresponding first pad, and the sampling pin is welded with the corresponding second pad.
本申请的一些实施例中，所述插针组件还包括设于壳体内的安装座，所述安装座套设 于多个所述采样插针上。In some embodiments of the present application, the pin assembly further includes a mounting seat provided in the housing, and the mounting seat is sleeved on the plurality of sampling pins.
本申请的一些实施例中，所述电池还包括陶瓷密封件，多个所述采样插针固定于所述陶瓷密封件上，所述陶瓷密封件固定于所述壳体上。In some embodiments of the present application, the battery further includes a ceramic sealing member, the plurality of sampling pins are fixed on the ceramic sealing member, and the ceramic sealing member is fixed on the housing.
本申请的一些实施例中，所述陶瓷密封件上设有多个贯穿孔，所述采样插针对应固定于对应的所述贯穿孔中。In some embodiments of the present application, the ceramic seal is provided with a plurality of through holes, and the sampling pins are correspondingly fixed in the corresponding through holes.
本申请的一些实施例中，所述电池还包括连接套，所述陶瓷密封件通过所述连接套固定于所述壳体上。In some embodiments of the present application, the battery further includes a connecting sleeve, and the ceramic sealing member is fixed on the casing through the connecting sleeve.
本申请的一些实施例中，所述壳体的外侧上设有凹槽，所述凹槽的底壁上设有采样通孔通孔，所述连接套固定于凹槽内，多个所述采样插针贯穿于所述采样通孔和所述连接套，所述陶瓷密封件固定于所述连接套远离所述壳体的一端。In some embodiments of the present application, a groove is formed on the outer side of the casing, a sampling through hole is formed on the bottom wall of the groove, the connecting sleeve is fixed in the groove, and a plurality of the The sampling pin penetrates through the sampling through hole and the connecting sleeve, and the ceramic seal is fixed to an end of the connecting sleeve away from the casing.
本申请的一些实施例中，所述极芯串中的多个极芯组沿第一方向排布，所述第一方向为所述电池的长度方向，所述电池的长度为400mm-2500mm。In some embodiments of the present application, the plurality of pole core groups in the pole core string are arranged along a first direction, and the first direction is the length direction of the battery, and the length of the battery is 400mm-2500mm.
本申请的一些实施例中，所述电池包括多个相互电连接的极芯串，多个所述极芯串沿第二方向排布，所述第二方向为所述电池的厚度方向。In some embodiments of the present application, the battery includes a plurality of pole core strings that are electrically connected to each other, and the plurality of pole core strings are arranged along a second direction, and the second direction is a thickness direction of the battery.
本申请的一些实施例中，所述电路板上还设有第二线路，所述采样组件还包括信号采集元件和采集线，所述信号采集元件通过所述采集线与所述第二线路电连接。In some embodiments of the present application, a second circuit is further provided on the circuit board, the sampling assembly further includes a signal acquisition element and a acquisition line, and the signal acquisition element is electrically connected to the second circuit through the acquisition line. connect.
本申请的一些实施例中，所述信号采集元件为温度感应元件、湿度感应元件、压力感应元件、气味感应元件中的至少一种。In some embodiments of the present application, the signal collection element is at least one of a temperature sensing element, a humidity sensing element, a pressure sensing element, and an odor sensing element.
本申请的一些实施例中，所述采样线和所述采集线中的至少之一为FFC。In some embodiments of the present application, at least one of the sampling line and the acquisition line is an FFC.
本申请的一些实施例中，所述壳体包括盖板及具有开口的壳本体，所述盖板封闭所述壳本体的开口，以形成密封的容纳腔，所述极芯串设于所述容纳腔内；多个所述采样插针固定并贯穿于所述盖板。In some embodiments of the present application, the casing includes a cover plate and a casing body having an opening, the cover plate closes the opening of the casing body to form a sealed accommodating cavity, and the pole core is serially connected to the casing body. In the accommodating cavity; a plurality of the sampling pins are fixed and pass through the cover plate.
本申请的第二方面，提供一种电池包，包括电池信息采集器和上述任一项所述的电池，所述电池信息采集器与所述电池连接。A second aspect of the present application provides a battery pack, including a battery information collector and the battery according to any one of the above, wherein the battery information collector is connected to the battery.
本申请的第三方面，提供一种电动车，包括上述任一项所述的电池包。A third aspect of the present application provides an electric vehicle, including the battery pack described in any one of the above.
本申请的有益效果为：本申请的电池，在壳体内设置采样组件，而且采样组件包括电路板及多个采样线，电路板上设有多个第一线路，采样线的第一端与对应的极芯组电连接，采样线的第二端与对应的第一线路电连接；另外，插针组件包括多个采样插针，采样插针用于贯穿壳体以电连接对应的第一线路与电池信息采集器，这样电路板可通过采样线对每个极芯组进行采样，并通过采样插针将采集到的信息传送至电池信息采集器，以便于了解电池内部各个极芯组的工作状态，有利于提高电池使用的安全性。The beneficial effects of the present application are as follows: the battery of the present application is provided with a sampling assembly in the casing, and the sampling assembly includes a circuit board and a plurality of sampling lines, the circuit board is provided with a plurality of first lines, and the first ends of the sampling lines correspond to The pole core group is electrically connected, and the second end of the sampling line is electrically connected with the corresponding first line; in addition, the pin assembly includes a plurality of sampling pins, and the sampling pins are used to penetrate the housing to electrically connect the corresponding first lines With the battery information collector, the circuit board can sample each pole core group through the sampling line, and transmit the collected information to the battery information collector through the sampling pin, so as to understand the work of each pole core group inside the battery. state, which is conducive to improving the safety of battery use.
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明 显，或通过本申请的实践了解到。Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the present application.
附图说明Description of drawings
图1是本申请实施例提供的电池与信息采集器连接的示意图；1 is a schematic diagram of a connection between a battery and an information collector provided by an embodiment of the present application;
图2是图1中省略了壳本体的示意图；Fig. 2 is the schematic diagram of omitting the shell body in Fig. 1;
图3是本申请实施例提供的电池的***图；3 is an exploded view of a battery provided by an embodiment of the present application;
图4是本申请实施例提供的电池部分结构的***图；4 is an exploded view of a partial structure of a battery provided by an embodiment of the present application;
图5是本申请实施例提供的电池部分结构的剖视图；5 is a cross-sectional view of a partial structure of a battery provided by an embodiment of the present application;
图6是本申请实施例提供的电路板的示意图；6 is a schematic diagram of a circuit board provided by an embodiment of the present application;
图7是本申请实施例提供的极芯组封装在同一封装袋内的示意图；7 is a schematic diagram of a pole core group packaged in the same packaging bag provided by an embodiment of the present application;
图8是本申请实施例提供的一体成型的封装膜形成封装袋的示意图，其中，一个连接部上设有凹坑；8 is a schematic diagram of an integrally formed packaging film forming a packaging bag according to an embodiment of the present application, wherein a concave is provided on one connecting part;
图9是本申请实施例提供的一体成型的封装膜形成封装袋的示意图，其中，两个连接部上设有凹坑；FIG. 9 is a schematic diagram of an integrally formed packaging film forming a packaging bag according to an embodiment of the present application, wherein two connecting parts are provided with dimples;
图10是本申请实施例提供的极芯组一一对应封装在封装袋内的示意图；FIG. 10 is a schematic diagram illustrating that the pole core groups provided in the embodiment of the present application are packaged in a packaging bag in a one-to-one correspondence;
图11是本申请实施例提供的电池包的示意图；11 is a schematic diagram of a battery pack provided by an embodiment of the present application;
图12是本申请实施例提供的电动车的示意图。FIG. 12 is a schematic diagram of an electric vehicle provided by an embodiment of the present application.
附图标记：Reference number:
100、电池；200、电池信息采集器；300、电池包；400、电动车；100, battery; 200, battery information collector; 300, battery pack; 400, electric vehicle;
10、壳体；101、盖板；102、壳本体；103、开口；104、容纳腔；105、凹槽；106、采样通孔；10. housing; 101, cover plate; 102, housing body; 103, opening; 104, accommodating cavity; 105, groove; 106, sampling through hole;
20、极芯串；201、封装袋；202、极芯组；203、极芯组主体；204、第一电极引出部件；205、第二电极引出部件；206、封装部；207、连接部；208、密封腔室；209、封装膜；210、凹坑；211、第一极芯组；212、第二极芯组；20, pole core string; 201, packaging bag; 202, pole core group; 203, pole core group main body; 204, first electrode lead-out part; 205, second electrode lead-out part; 206, packaging part; 207, connecting part; 208, sealed chamber; 209, packaging film; 210, pit; 211, first pole core group; 212, second pole core group;
30、采样组件；301、电路板；302、采样线；303、第一线路；3031、第一连接段；3032、第二连接段；304、第一焊盘；305、第二焊盘；306、第二线路；307、信号采集元件；308、采集线；309、保护元器件；310、第一采样线；311、第二采样线；30, sampling component; 301, circuit board; 302, sampling line; 303, first circuit; 3031, first connection segment; 3032, second connection segment; 304, first pad; 305, second pad; 306 307, signal acquisition element; 308, acquisition line; 309, protection element; 310, first sampling line; 311, second sampling line;
40、插针组件；401、采样插针；402、安装座；403、安装孔；404、采集插针；40, pin assembly; 401, sampling pin; 402, mounting seat; 403, mounting hole; 404, collection pin;
50、陶瓷密封件；501、贯穿孔；50. Ceramic seals; 501. Through holes;
60、连接套；60. Connection sleeve;
70、绝缘件；701、避让孔。70. Insulation parts; 701. Avoid holes.
具体实施方式detailed description
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, but should not be construed as a limitation on the present application.
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Axial, Radial, Circumferential The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. The orientation configuration and operation are therefore not to be construed as limitations on the present application.
如图1至图10所示，本申请提供了一种电池100，其包括壳体10、极芯串20、采样组件30和插针组件40。极芯串20设于壳体10内，极芯串20包括封装袋201及多个串联的极芯组202，极芯组202封装于封装袋201内。采样组件30设于壳体10内，采样组件30包括电路板301及多个采样线302，电路板301上设有多个第一线路303，采样线302的一端与对应的极芯组202电连接，采样线302的第二端与对应的第一线路303电连接。插针组件40包括多个采样插针401，采样插针401用于贯穿壳体10以电连接对应的第一线路303与电池信息采集器200。As shown in FIGS. 1 to 10 , the present application provides a battery 100 , which includes a housing 10 , a pole core string 20 , a sampling assembly 30 and a pin assembly 40 . The pole core string 20 is disposed in the housing 10 , and the pole core string 20 includes a packaging bag 201 and a plurality of pole core groups 202 connected in series. The pole core group 202 is packaged in the packaging bag 201 . The sampling assembly 30 is arranged in the housing 10 , and the sampling assembly 30 includes a circuit board 301 and a plurality of sampling lines 302 . The circuit board 301 is provided with a plurality of first lines 303 , and one end of the sampling line 302 is electrically connected to the corresponding pole core group 202 . connected, the second end of the sampling line 302 is electrically connected to the corresponding first line 303 . The pin assembly 40 includes a plurality of sampling pins 401 , and the sampling pins 401 are used to penetrate through the casing 10 to electrically connect the corresponding first circuit 303 and the battery information collector 200 .
可以理解的，采样插针401贯穿于壳体10，并且采样插针401的内端与对应的第一线路303连接，采样插针401的外端与电池信息采集器200连接。其中，采样插针401的内端是指采样插针401位于壳体10内的一端，采样插针401的外端是指采样插针401位于壳体10外的一端。It can be understood that the sampling pins 401 penetrate through the housing 10 , the inner ends of the sampling pins 401 are connected to the corresponding first lines 303 , and the outer ends of the sampling pins 401 are connected to the battery information collector 200 . The inner end of the sampling pin 401 refers to the end of the sampling pin 401 inside the housing 10 , and the outer end of the sampling pin 401 refers to the end of the sampling pin 401 outside the housing 10 .
其中，电路板301可以为PCB板，电路板301上的第一线路303可以但不限于导电金属箔、导线或导电金属镀层。第一线路303可以通过但不局限于粘接、焊接、蚀刻、注塑、热压、电镀、化学镀等方式设置在电路板301上。The circuit board 301 may be a PCB board, and the first circuit 303 on the circuit board 301 may be, but not limited to, conductive metal foil, wire, or conductive metal plating. The first circuit 303 may be disposed on the circuit board 301 by, but not limited to, bonding, welding, etching, injection molding, hot pressing, electroplating, electroless plating, and the like.
本申请的电池100，在壳体10内设置采样组件30，而且采样组件30包括电路板301及多个采样线302，电路板301上设有多个第一线路303，采样线302的第一端与对应的极芯组202电连接，采样线302的第二端与对应的第一线路303电连接；另外，插针组件40包括多个采样插针401，采样插针401用于贯穿壳体10以电连接对应的第一线路303与电池信息采集器200，这样电路板301可通过采样线302对每个极芯组202进行采样，并通过采样插针401将采集到的信息(例如电压和/或电流)传送至电池信息采集器200，以便于了解电池100内部各个极芯组202的工作状态，有利于提高电池100使用的安全性。In the battery 100 of the present application, a sampling assembly 30 is disposed in the casing 10 , and the sampling assembly 30 includes a circuit board 301 and a plurality of sampling lines 302 , and a plurality of first lines 303 are disposed on the circuit board 301 . The end is electrically connected to the corresponding pole core group 202, and the second end of the sampling line 302 is electrically connected to the corresponding first line 303; in addition, the pin assembly 40 includes a plurality of sampling pins 401, and the sampling pins 401 are used to penetrate the shell The body 10 is electrically connected to the corresponding first circuit 303 and the battery information collector 200, so that the circuit board 301 can sample each pole core group 202 through the sampling line 302, and the collected information (for example, through the sampling pin 401) voltage and/or current) to the battery information collector 200 , so as to understand the working status of each pole core group 202 inside the battery 100 , which is beneficial to improve the safety of the battery 100 in use.
在一些实施例中，极芯组202包括极芯组主体203以及用于引出电流的第一电极引出部件204和第二电极引出部件205，用于串联连接两个极芯组202的第一电极引出部件204和第二电极引出部件205可与同一个采样线302的第一端电连接，未用于串联连接两个极芯组202的第一电极引出部件204与一个采样线302的第一端电连接，未用于串联两个极芯组件202的第二电极引出部件205与另一个采样线302的第一端电连接。如此设置，可减少采样线302的数量，有利于节约成本。In some embodiments, the pole core group 202 includes a pole core group main body 203 and a first electrode lead-out part 204 and a second electrode lead-out part 205 for drawing current, for connecting the first electrodes of the two pole core groups 202 in series The lead-out part 204 and the second electrode lead-out part 205 can be electrically connected to the first end of the same sampling line 302 , and are not used to connect the first electrode lead-out part 204 of the two pole core groups 202 in series with the first end of one sampling line 302 . The terminals are electrically connected, and the second electrode lead-out part 205 that is not used for connecting the two pole core assemblies 202 in series is electrically connected to the first terminal of the other sampling line 302 . With this arrangement, the number of sampling lines 302 can be reduced, which is beneficial to saving costs.
当然，在另一些实施例中，也可设置为每个极芯组202的第一电极引出部件204分别与对应的采样线302的第一端电连接，每个极芯组202的第二电极引出部件205分别与对应的采样线302的第一端电连接；或者，也可设置为若干个极芯组202的第一电极引出部件204分别与对应的采样线302的第一端电连接，若干个极芯组202的第二电极引出部件205分别与对应的采样线302的第一端电连接。Of course, in other embodiments, the first electrode lead-out member 204 of each pole core group 202 may be electrically connected to the first end of the corresponding sampling line 302 respectively, and the second electrode of each pole core group 202 The lead-out parts 205 are respectively electrically connected to the first ends of the corresponding sampling lines 302; alternatively, the first electrode lead-out parts 204 of a plurality of pole core groups 202 can be respectively electrically connected to the first ends of the corresponding sampling lines 302, The second electrode lead-out parts 205 of the plurality of pole core groups 202 are respectively electrically connected to the first ends of the corresponding sampling lines 302 .
如图3所示，极芯串20包含两个极芯组202，两个极芯组202分别为第一极芯组211和第二极芯组212，第一极芯组211的第一电极引出部件204与第一采样线310的第一端电连接，第一极芯组211的第二电极引出部件205和第二极芯组212的第一电极引出部件204与同一个第二采样线311的第一端电连接。As shown in FIG. 3 , the pole core string 20 includes two pole core groups 202 . The two pole core groups 202 are a first pole core group 211 and a second pole core group 212 respectively. The first electrode of the first pole core group 211 The lead-out part 204 is electrically connected to the first end of the first sampling line 310 , and the second electrode lead-out part 205 of the first pole core group 211 and the first electrode lead-out part 204 of the second pole core group 212 are connected to the same second sampling line The first end of 311 is electrically connected.
此外，采样线302与第一线路303可以为一一对应设置；第一线路303与采样插针401可以为一一对应设置。In addition, the sampling lines 302 and the first lines 303 may be set in a one-to-one correspondence; the first lines 303 and the sampling pins 401 may be set in a one-to-one correspondence.
需要说明的是，极芯组202可以是由一个单独的极芯构成，也可以包括至少两个极芯，至少两个极芯并联连接构成极芯组202。例如，两个极芯并联连接构成极芯组202，或者，三个极芯并联连接构成极芯组202。It should be noted that the pole core group 202 may be composed of a single pole core, or may include at least two pole cores, and at least two pole cores are connected in parallel to form the pole core group 202 . For example, two pole cores are connected in parallel to form the pole core group 202 , or three pole cores are connected in parallel to form the pole core group 202 .
如果极芯组202包含一个极芯，第一电极引出部件204和第二电极引出部件205中的一个为正极耳，另一个为负极耳；如果极芯组202包含多个极芯，第一电极引出部件204和第二电极引出部件205中的一个为多个极芯的正极耳复合并焊接在一起形成的复合极耳，另一个为多个极芯的负极耳复合并焊接在一起形成的复合极耳。If the pole core group 202 contains one pole core, one of the first electrode lead-out part 204 and the second electrode lead-out part 205 is a positive electrode lug, and the other is a negative electrode lug; if the pole core group 202 contains a plurality of pole cores, the first electrode One of the lead-out part 204 and the second electrode lead-out part 205 is a composite tab formed by combining the positive tabs of a plurality of pole cores and welding together, and the other is a composite tab formed by combining and welding the negative tabs of a plurality of pole cores together. Pole ear.
在本申请中，所提到的极芯，为动力电池100领域常用的极芯，极芯以及极芯组202为电池100内部的组成部分，而不能被理解为电池100本身；本申请中提到的电池100，为一个独立的单体电池100，不能因其包含多个极芯，而将其简单的理解为电池模组或电池组。另外，本申请中的极芯可以是卷绕形成的极芯，也可以是叠片的方式制成的极芯；一般情况下，极芯至少包括正极片、隔膜和负极片。In this application, the pole core mentioned is the pole core commonly used in the field of power battery 100, the pole core and the pole core group 202 are the internal components of the battery 100, and cannot be understood as the battery 100 itself; The obtained battery 100 is an independent unit battery 100, and it cannot be simply understood as a battery module or a battery pack because it contains multiple pole cores. In addition, the pole core in this application may be a pole core formed by winding, or a pole core made by lamination; generally, the pole core includes at least a positive electrode sheet, a separator and a negative electrode sheet.
本申请中的电池100可以为液态电池，即极芯中含有电解液，也可以为固态电池，极芯中含有固态电解质或凝胶聚合物电解质。The battery 100 in the present application can be a liquid battery, that is, the electrode core contains an electrolyte, or it can be a solid-state battery, and the electrode core contains a solid electrolyte or a gel polymer electrolyte.
在一些实施例中，壳体10为金属壳体，极芯串20封装于壳体10内。这样，通过封装袋201和壳体10的双重密封作用，有利于提高电池100的密封性能。In some embodiments, the casing 10 is a metal casing, and the pole core string 20 is packaged in the casing 10 . In this way, the double sealing effect of the packaging bag 201 and the case 10 is beneficial to improve the sealing performance of the battery 100 .
在一些实施例中，如图3至图5所示，壳体10包括盖板101及具有开口103的壳本体102，盖板101封闭壳本体102的开口103，以形成密封的容纳腔104，极芯串20设于容纳腔104内；多个采样插针401固定并贯穿于盖板101。In some embodiments, as shown in FIGS. 3 to 5 , the casing 10 includes a cover plate 101 and a casing body 102 having an opening 103 , and the cover plate 101 closes the opening 103 of the casing body 102 to form a sealed accommodating cavity 104 , The pole core string 20 is arranged in the accommodating cavity 104 ; a plurality of sampling pins 401 are fixed and penetrate through the cover plate 101 .
本申请中，壳本体102沿第一方向的两端均具有开口103，盖板101设有两个，每个盖板101封闭对应的开口103，多个采样插针401固定并贯穿于同一个盖板101。其中，第一 方向为电池的长度方向。如图3所示，第一方向为图中的X方向。In the present application, both ends of the housing body 102 along the first direction have openings 103 , two cover plates 101 are provided, each cover plate 101 closes the corresponding opening 103 , and a plurality of sampling pins 401 are fixed and penetrate through the same one Cover plate 101 . Wherein, the first direction is the length direction of the battery. As shown in FIG. 3 , the first direction is the X direction in the drawing.
在一些实施例中，电路板301与插针组件40固定连接。当然，在其他实施例中，电路板301也可以固定于壳体10的内壁上。In some embodiments, the circuit board 301 is fixedly connected to the pin assembly 40 . Of course, in other embodiments, the circuit board 301 can also be fixed on the inner wall of the casing 10 .
进一步地，在一些实施例中，如图3及图6所示，电路板301上还设有多个第一焊盘304和多个第二焊盘305，第一线路303连接于对应的第一焊盘304和第二焊盘305之间，采样线302的第二端与对应的第一焊盘304焊接，采样插针401与对应的第二焊盘305焊接。本申请中，采样线302与第一焊盘304一一对应，采样插针401与第二焊盘305一一对应。Further, in some embodiments, as shown in FIG. 3 and FIG. 6 , a plurality of first pads 304 and a plurality of second pads 305 are further provided on the circuit board 301 , and the first lines 303 are connected to corresponding first pads 304 . Between a pad 304 and a second pad 305 , the second end of the sampling line 302 is welded to the corresponding first pad 304 , and the sampling pin 401 is welded to the corresponding second pad 305 . In this application, the sampling lines 302 are in one-to-one correspondence with the first pads 304 , and the sampling pins 401 are in one-to-one correspondence with the second pads 305 .
如图6所示，第一焊盘304为表贴焊盘，也即第一焊盘304呈片状，采样线302的第二端可以焊接在对应的第一焊盘304的表面，以与对应的第一线路303电连接。第二焊盘305可以为插孔焊盘，也即第二焊盘305内设有插孔，采样插针401可以插设并焊接于插孔内，以通过对应的第二焊盘305与对应的第一线路303电连接。当然，第一焊盘304也可为插孔焊盘，第二焊盘305也可为表贴焊盘。第一焊盘304和第二焊盘305可以相同也可以不同，对于第一焊盘304和第二焊盘305的具体形式，本申请不作具体限定。As shown in FIG. 6 , the first pad 304 is a surface-mount pad, that is, the first pad 304 is in the shape of a sheet, and the second end of the sampling line 302 can be soldered on the surface of the corresponding first pad 304 to be compatible with the surface of the first pad 304 . The corresponding first lines 303 are electrically connected. The second pad 305 can be a socket pad, that is, a socket is provided in the second pad 305, and the sampling pin 401 can be inserted and welded in the socket, so as to communicate with the corresponding second pad 305 through the corresponding second pad 305. The first line 303 is electrically connected. Of course, the first pad 304 can also be a socket pad, and the second pad 305 can also be a surface mount pad. The first pad 304 and the second pad 305 may be the same or different, and the specific forms of the first pad 304 and the second pad 305 are not specifically limited in this application.
当然，在其他实施例中，电路板301也可通过铆接或粘接或注塑或热压等方式与插针组件40固定连接。Of course, in other embodiments, the circuit board 301 can also be fixedly connected to the pin assembly 40 by means of riveting, bonding, injection molding, or hot pressing.
在一些实施例中，如图3至图5所示，插针组件40还包括设于壳体10内的安装座402，安装座402套设于多个采样插针401上。可以理解的，在组装时可先将采样插针401安装于安装座402上，以便于各个采样插针401与电路板301的连接固定。In some embodiments, as shown in FIGS. 3 to 5 , the pin assembly 40 further includes a mounting seat 402 provided in the housing 10 , and the mounting seat 402 is sleeved on the plurality of sampling pins 401 . It can be understood that the sampling pins 401 can be installed on the mounting seat 402 first during assembly, so as to facilitate the connection and fixation of each sampling pin 401 and the circuit board 301 .
具体的，安装座402上设有多个安装孔403，采样插针401对应固定于安装孔403中。并且，采样插针401的内端和外端均延伸出安装孔403。Specifically, the mounting seat 402 is provided with a plurality of mounting holes 403 , and the sampling pins 401 are correspondingly fixed in the mounting holes 403 . In addition, both the inner end and the outer end of the sampling pin 401 extend out of the installation hole 403 .
需要说明的是，安装座402与采样插针401的连接可以但不局限于过盈配合、粘接、焊接或注塑或热压等方式。另外，采样插针401可以一一对应固定于安装孔403中。当然，也可以为一个安装孔403中固定于多个采样插针401，此时采样插针401之间需要相互绝缘。It should be noted that the connection between the mounting seat 402 and the sampling pin 401 may be, but not limited to, interference fit, bonding, welding, injection molding, or hot pressing. In addition, the sampling pins 401 can be fixed in the installation holes 403 in a one-to-one correspondence. Of course, a plurality of sampling pins 401 may also be fixed in one mounting hole 403, and in this case, the sampling pins 401 need to be insulated from each other.
在一些实施例中，如图3至图5所示，电池100还包括陶瓷密封件50，多个采样插针401固定于陶瓷密封件50上，陶瓷密封件50固定于壳体10上。也即，多个采样插针401通过陶瓷密封件50固定于壳体10上。通过陶瓷密封件50可以有效保证采样插针401与壳体10连接处的密封性能。如图4所示，陶瓷密封件50固定于盖板101上。In some embodiments, as shown in FIG. 3 to FIG. 5 , the battery 100 further includes a ceramic seal 50 , a plurality of sampling pins 401 are fixed on the ceramic seal 50 , and the ceramic seal 50 is fixed on the case 10 . That is, the plurality of sampling pins 401 are fixed on the housing 10 through the ceramic seal 50 . The ceramic seal 50 can effectively ensure the sealing performance of the connection between the sampling pin 401 and the housing 10 . As shown in FIG. 4 , the ceramic seal 50 is fixed on the cover plate 101 .
如图4所示，陶瓷密封件50上设有多个贯穿孔501，采样插针401固定于对应的贯穿孔501中。可以理解的，采样插针401可以一一对应地固定贯穿孔501中；当然，也可以为一个贯穿孔501中固定有多个采样插针401，此时采样插针401之间需要相互绝缘。As shown in FIG. 4 , the ceramic seal 50 is provided with a plurality of through holes 501 , and the sampling pins 401 are fixed in the corresponding through holes 501 . It can be understood that the sampling pins 401 can be fixed in the through holes 501 in a one-to-one correspondence; of course, a plurality of sampling pins 401 can also be fixed in one through hole 501, and the sampling pins 401 need to be insulated from each other.
需要说明的是，采样插针401固定于贯穿孔501中的方式可以但不局限于焊接、过盈配 合、粘接等。例如，采样插针401可通过锡焊固定于贯穿孔501中。It should be noted that the manner in which the sampling pin 401 is fixed in the through hole 501 may be, but not limited to, welding, interference fit, bonding, and the like. For example, the sampling pin 401 can be fixed in the through hole 501 by soldering.
如图3至图5所示，电池100还包括连接套60，陶瓷密封件50通过连接套60固定于壳体10上。具体的，陶瓷密封件50通过连接套60固定于盖板101上。As shown in FIG. 3 to FIG. 5 , the battery 100 further includes a connecting sleeve 60 , and the ceramic sealing member 50 is fixed on the casing 10 through the connecting sleeve 60 . Specifically, the ceramic seal 50 is fixed on the cover plate 101 through the connecting sleeve 60 .
需要说明的是，连接套60与壳体10、连接套60与陶瓷密封件50连接的方式可以但不局限于焊接、过盈配合、粘接等。例如，连接套60通过激光焊接固定于壳体10上，陶瓷密封件50通过钎焊固定于连接套60上。It should be noted that, the connection method between the connection sleeve 60 and the housing 10 and the connection sleeve 60 and the ceramic seal 50 may be, but not limited to, welding, interference fit, and bonding. For example, the connecting sleeve 60 is fixed on the housing 10 by laser welding, and the ceramic sealing member 50 is fixed on the connecting sleeve 60 by brazing.
进一步地，如图4及图5所示，壳体10的外侧上设有凹槽105，凹槽105的底壁上设有采样通孔106，连接套60固定于凹槽105内，采样插针401贯穿于采样通孔106和连接套60，陶瓷密封件50固定于连接套60远离壳体10的一端。其中，壳体10的外侧是指壳体10背离容纳腔104的一侧。通过将连接套60固定于凹槽105内，可减少连接套60占用外部的空间，有利于减小电池100的尺寸。具体的，盖板101的外侧设有凹槽105，陶瓷密封件50固定于连接套60远离盖板101的一端。Further, as shown in FIG. 4 and FIG. 5 , a groove 105 is provided on the outer side of the housing 10 , a sampling through hole 106 is provided on the bottom wall of the groove 105 , the connecting sleeve 60 is fixed in the groove 105 , and the sampling plug is inserted into the groove 105 . The needle 401 penetrates through the sampling through hole 106 and the connection sleeve 60 , and the ceramic seal 50 is fixed to the end of the connection sleeve 60 away from the housing 10 . Wherein, the outer side of the casing 10 refers to the side of the casing 10 facing away from the accommodating cavity 104 . By fixing the connection sleeve 60 in the groove 105 , the external space occupied by the connection sleeve 60 can be reduced, which is beneficial to reduce the size of the battery 100 . Specifically, the outer side of the cover plate 101 is provided with a groove 105 , and the ceramic seal 50 is fixed to the end of the connection sleeve 60 away from the cover plate 101 .
如图4及图5所示，电池100还包括绝缘件70，绝缘件70设于盖板101与电路板301之间，绝缘件70上设有避让孔701，避让孔701用于避让多个采样插针401。As shown in FIG. 4 and FIG. 5 , the battery 100 further includes an insulating member 70 . The insulating member 70 is disposed between the cover plate 101 and the circuit board 301 . The insulating member 70 is provided with an escape hole 701 , and the escape hole 701 is used to avoid a plurality of Sampling pin 401.
如图3、图4及图6所示，电路板301上还设有第二线路306，采样组件30还包括信号采集元件307和采集线308，信号采集元件307通过采集线308与第二线路306电连接。As shown in FIG. 3 , FIG. 4 and FIG. 6 , the circuit board 301 is further provided with a second circuit 306 , and the sampling assembly 30 further includes a signal acquisition element 307 and an acquisition line 308 , and the signal acquisition element 307 communicates with the second circuit through the acquisition line 308 . 306 Electrical connection.
其中，电路板301上的第二线路306可以但不限于导电金属箔、导线或导电金属镀层。第二线路306可以通过但不局限于粘接、焊接、蚀刻、注塑、热压、电镀、化学镀等方式设置在电路板301上。另外，第二线路306和第一线路303可以相同也可以不同，对此，本申请不作具体限定。Wherein, the second circuit 306 on the circuit board 301 may be, but not limited to, conductive metal foil, wire or conductive metal plating. The second circuit 306 may be disposed on the circuit board 301 by, but not limited to, bonding, welding, etching, injection molding, hot pressing, electroplating, electroless plating, and the like. In addition, the second line 306 and the first line 303 may be the same or different, which are not specifically limited in this application.
在一些实施例中，信号采集元件307为温度感应元件、湿度感应元件、压力感应元件、气味感应元件中的至少一种。可以理解的，信号采集元件307可以与极芯组202接触，也可不与极芯组202接触。对此，本申请不作具体限定，例如，信号采集元件307可以贴设于极芯组主体203或第一电极引出部件204或第二电极引出部件205或连接片。In some embodiments, the signal acquisition element 307 is at least one of a temperature sensing element, a humidity sensing element, a pressure sensing element, and an odor sensing element. It can be understood that the signal collecting element 307 may be in contact with the pole core group 202 or not in contact with the pole core group 202 . This is not specifically limited in this application. For example, the signal collecting element 307 may be attached to the electrode core group main body 203 or the first electrode lead-out part 204 or the second electrode lead-out part 205 or the connecting piece.
在一些实施例中，如图4及图6所示，插针组件40还包括采集插针404，采集插针404与第二线路306电连接，采集插针404贯穿于壳体10，以用于与电池信息采集器200电连接。In some embodiments, as shown in FIGS. 4 and 6 , the pin assembly 40 further includes a collection pin 404 , the collection pin 404 is electrically connected to the second circuit 306 , and the collection pin 404 penetrates through the housing 10 for It is electrically connected to the battery information collector 200 .
需要说明的是，采集插针404与采样插针401的结构可以相同或不同，采集插针404与第二线路306的连接方式可以与采样插针401与第一线路303的方式相同，并且采集插针404与安装座402、陶瓷密封件50及壳体10连接方式可以与采样插针401与安装座402、陶瓷密封件50及壳体10连接方式相同，在此不再赘述。It should be noted that the structures of the acquisition pin 404 and the sampling pin 401 may be the same or different, and the connection method between the acquisition pin 404 and the second line 306 may be the same as that of the sampling pin 401 and the first line 303, and the acquisition The connection between the pin 404 and the mounting seat 402 , the ceramic seal 50 and the housing 10 can be the same as the connection between the sampling pin 401 and the mounting seat 402 , the ceramic seal 50 and the housing 10 , which is not repeated here.
在一些实施例中，采样线302和采集线308中的至少之一为FFC(Flexible Flat Cable， 柔性扁平电缆)。如此设置，FFC的制作工艺相对简单，有利于降低成本。当然，在其他实施例中，采样线302和采集线308中的至少之一也可为导线。In some embodiments, at least one of the sampling line 302 and the acquisition line 308 is FFC (Flexible Flat Cable). With this arrangement, the manufacturing process of the FFC is relatively simple, which is beneficial to reduce costs. Of course, in other embodiments, at least one of the sampling line 302 and the sampling line 308 can also be a wire.
在一些实施例中，如图4及图6所示，采样组件30还包括多个保护元器件309，采样线302的第二端通过对应的保护元器件309与对应的第一线路303电连接。本申请中，采样线302、保护元器件309、第一线路303一一对应设置。In some embodiments, as shown in FIGS. 4 and 6 , the sampling assembly 30 further includes a plurality of protection components 309 , and the second end of the sampling line 302 is electrically connected to the corresponding first line 303 through the corresponding protection component 309 . In this application, the sampling lines 302 , the protection components 309 , and the first lines 303 are arranged in a one-to-one correspondence.
在一些实施例中，保护元器件309为保险丝。当然，保护元器件309还可为导电片，导电片上设有薄弱区；或者，保护元器件309也可为自身电路结构形成的保护结构。当电池100内部的电路的电流超过阈值时，保护元器件309可以起到过流保护的作用，进而可提高电池100使用的安全性。另外，保险丝可以为蛇形保险丝或贴片保险丝。In some embodiments, the protection component 309 is a fuse. Of course, the protection element 309 can also be a conductive sheet, and the conductive sheet is provided with a weak area; or, the protection element 309 can also be a protection structure formed by its own circuit structure. When the current of the circuit inside the battery 100 exceeds the threshold, the protection component 309 can play the role of overcurrent protection, thereby improving the safety of the battery 100 in use. Additionally, the fuse may be a serpentine fuse or a chip fuse.
在一些实施例中，保险丝与对应的第一线路303一体成型；例如，保险丝与第一线路303通过蚀刻一体形成在电路板301上。或者，保险丝与对应的采样线302为一体成型。通过保险丝与第一线路303的集成有利于减少结构件的数量，有利于简化装配。In some embodiments, the fuse and the corresponding first circuit 303 are integrally formed; for example, the fuse and the first circuit 303 are integrally formed on the circuit board 301 by etching. Alternatively, the fuse is integrally formed with the corresponding sampling line 302 . The integration of the fuse and the first circuit 303 is beneficial to reduce the number of structural parts and to simplify assembly.
如图4及图6所示，第一线路303包括第一连接段3031和第二连接段3032，保护元器件309连接于对应的第一线路303的第一连接段3031和第二连接段3032之间，采样线302的第二端与对应的第一线路303的第一连接段3031连接。也即，采样线302的第二端通过对应的第一线路303的第一连接段3031与对应的保护元器件309连接，该第一线路303的第二连接段3032与对应的采样插针401连接。具体实施中，保险丝连接于对应的第一线路303的第一连接段3031和第二连接段3032之间，且保险丝、第一线路303的第一连接段3031和第二连接段3032三者一体成型。As shown in FIG. 4 and FIG. 6 , the first line 303 includes a first connection section 3031 and a second connection section 3032 , and the protection element 309 is connected to the first connection section 3031 and the second connection section 3032 of the corresponding first line 303 . In between, the second end of the sampling line 302 is connected to the first connection section 3031 of the corresponding first line 303 . That is, the second end of the sampling line 302 is connected to the corresponding protection component 309 through the first connecting section 3031 of the corresponding first line 303 , and the second connecting section 3032 of the first line 303 is connected to the corresponding sampling pin 401 connect. In a specific implementation, the fuse is connected between the first connection segment 3031 and the second connection segment 3032 of the corresponding first line 303 , and the fuse, the first connection segment 3031 and the second connection segment 3032 of the first line 303 are integrated forming.
在一些实施例中，如图2所示，极芯串20中的多个极芯组202沿第一方向排布，第一方向为电池100的长度方向，电池100的长度为400mm-2500mm。当然，在其他实施例中，极芯串20中的多个极芯组202也可沿第二方向排布，第二方向为电池100的厚度方向。如图2所示，第一方向为图中X方向，第二方向为图中Y方向。In some embodiments, as shown in FIG. 2 , the plurality of pole core groups 202 in the pole core string 20 are arranged along a first direction, the first direction being the length direction of the battery 100 , and the length of the battery 100 is 400mm-2500mm. Of course, in other embodiments, the plurality of pole core groups 202 in the pole core string 20 may also be arranged along the second direction, and the second direction is the thickness direction of the battery 100 . As shown in FIG. 2 , the first direction is the X direction in the figure, and the second direction is the Y direction in the figure.
在一些实施例中，如图3所示，电池100包括多个相互电连接的极芯串20，多个极芯串20沿第二方向排布，第二方向为电池100的厚度方向。当然，在其他实施例中，第二方向也可为电池100的长度方向。In some embodiments, as shown in FIG. 3 , the battery 100 includes a plurality of pole core strings 20 that are electrically connected to each other, and the plurality of pole core strings 20 are arranged along a second direction, which is the thickness direction of the battery 100 . Of course, in other embodiments, the second direction can also be the length direction of the battery 100 .
需要说明的是，电池100包含极芯串20的数量可根据实际需要进行设置，并且，每个极芯串20中包含极芯组202的数量可以相同也可以不同，具体可根据实际需要进行设置。It should be noted that the number of pole core strings 20 contained in the battery 100 can be set according to actual needs, and the number of pole core groups 202 contained in each pole core string 20 can be the same or different, and can be set according to actual needs. .
可以理解的，当电池100包括多个极芯串20时，极芯串20之间可以采用并联或串联或混联，至于具体如何连接，可根据实际需要进行设置。It can be understood that when the battery 100 includes a plurality of pole core strings 20, the pole core strings 20 may be connected in parallel, in series, or in a mixed connection. As for the specific connection, it can be set according to actual needs.
例如，极芯串20之间采用串联连接。并且，相邻两个极芯串20中位于极芯串20的长度方向同一端的两极芯组202串联连接。其中，极芯串20的长度沿第一方向延伸，如此设 置，可使极芯串20之间的电连接路径相对较短，有利于减小内阻。For example, the pole core strings 20 are connected in series. In addition, the two pole core groups 202 located at the same end of the pole core string 20 in the longitudinal direction of the two adjacent pole core strings 20 are connected in series. The length of the pole core strings 20 extends along the first direction, and such arrangement can make the electrical connection paths between the pole core strings 20 relatively short, which is beneficial to reduce the internal resistance.
如图2所示，电池100包括两个串联的极芯串20，每个极芯串20包括两个极芯组202，两个极芯串20中位于第一方向同一端的两极芯组202串联连接，也即图2中两极芯串20中位于最后端的两极芯组202串联连接。As shown in FIG. 2 , the battery 100 includes two pole core strings 20 connected in series, each pole core string 20 includes two pole core groups 202 , and two pole core groups 202 located at the same end in the first direction in the two pole core strings 20 are connected in series connection, that is, the bipolar core group 202 located at the rearmost end of the bipolar core string 20 in FIG. 2 is connected in series.
在一些实施例中，如图7所示，极芯串20包括一个封装袋201，对应极芯串20包括的多个极芯组202封装在同一个封装袋201内；In some embodiments, as shown in FIG. 7 , the pole core string 20 includes one packaging bag 201, and the plurality of pole core groups 202 included in the corresponding pole core string 20 are packaged in the same packaging bag 201;
极芯组202包括极芯组主体203以及用于引出电流的第一电极引出部件204和第二电极引出部件205，用于串联连接两个极芯组202的第一电极引出部件204和第二电极引出部件205的连接处位于封装袋201内。The pole core group 202 includes a pole core group main body 203 and a first electrode lead-out part 204 and a second electrode lead-out part 205 for extracting current, which are used to connect the first electrode lead-out part 204 and the second electrode lead-out part 204 of the two pole core groups 202 in series. The connection point of the electrode lead-out part 205 is located in the packaging bag 201 .
如图7所示，封装袋201与第一电极引出部件204和/或第二电极引出部件205相对位置形成有封装部206以将相邻的两个极芯组主体203隔离；串联连接的两个极芯组202中的一个极芯组202的第一电极引出部件204和另一个极芯组202的第二电极引出部件205中的至少之一位于封装部206内，采样线302的第一端可伸入封装部206内，以与第一电极引出部件204或第二电极引出部件205连接。As shown in FIG. 7 , a packaging portion 206 is formed in the packaging bag 201 relative to the first electrode lead-out part 204 and/or the second electrode lead-out part 205 to isolate two adjacent pole core group bodies 203; At least one of the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 is located in the encapsulation part 206 , and the first electrode of the sampling line 302 The end can extend into the package part 206 to be connected with the first electrode lead-out part 204 or the second electrode lead-out part 205 .
可以理解的，可以在封装部206设置贯通孔，采样线302的第一端可通过贯通孔与第一电极引出部件204或第二电极引出部件205连接。或者，可先将采样线302的部分埋设在封装部206内，并将采样线302的一端与第一电极引出部件204或第二电极引出部件205连接。It can be understood that a through hole may be provided in the encapsulation part 206 , and the first end of the sampling wire 302 may be connected to the first electrode lead-out part 204 or the second electrode lead-out part 205 through the through hole. Alternatively, part of the sampling line 302 may be embedded in the package part 206 first, and one end of the sampling line 302 may be connected to the first electrode lead-out part 204 or the second electrode lead-out part 205 .
在另一些实施例中，串联连接的两个极芯组202中的一个极芯组202的第一电极引出部件204与另一个极芯组202的第二电极引出部件205通过连接片连接，连接片位于封装部206内，采样线302的第一端可伸入封装部206内，以与连接片连接。In other embodiments, the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 of the two pole core groups 202 connected in series are connected through a connecting piece. The chip is located in the encapsulation part 206, and the first end of the sampling wire 302 can extend into the encapsulation part 206 to be connected with the connecting chip.
其中，采样线302的第一端与第一电极引出部件204或第二电极引出部件205或连接片连接可以为焊接、铆接、粘接等。例如，可采用超声焊接。The connection between the first end of the sampling wire 302 and the first electrode lead-out part 204 or the second electrode lead-out part 205 or the connecting piece may be welding, riveting, bonding or the like. For example, ultrasonic welding may be employed.
关于封装袋201内的封装部206如何形成，下面将进行详细阐述，需要说明的是，封装部206的形成可以但不局限于以下方式：How to form the encapsulation portion 206 in the encapsulation bag 201 will be described in detail below. It should be noted that the encapsulation portion 206 can be formed in but not limited to the following ways:
在一些实施例中，如图8及图9所示，封装袋201包括相对设置的两个连接部207，封装袋201具有内部空间，两个连接部207在预设位置接合以将封装袋201的内部空间分隔成多个密封腔室208，密封腔室208中设有极芯组202。In some embodiments, as shown in FIG. 8 and FIG. 9 , the packaging bag 201 includes two connecting parts 207 arranged opposite to each other, the packaging bag 201 has an inner space, and the two connecting parts 207 are joined at preset positions to connect the packaging bag 201 The inner space is divided into a plurality of sealed chambers 208 , and a pole core group 202 is arranged in the sealed chambers 208 .
上述的“预设位置”可以理解为相邻两个极芯组主体203的间隔处以及两个连接部207的外边缘。其中，两个连接部207在相邻两个极芯组主体203的间隔处接合就可形成封装部206。The above-mentioned “preset position” can be understood as the space between two adjacent pole core group bodies 203 and the outer edges of the two connecting portions 207 . The packaging portion 206 can be formed by joining the two connecting portions 207 at the interval between two adjacent pole core group bodies 203 .
在一些实施例中，封装袋201由一体成型的封装膜209沿预设的折线对折形成，封装膜 209位于折线两侧的部分即为两个连接部207。In some embodiments, the packaging bag 201 is formed by folding the integrally formed packaging film 209 in half along a predetermined folding line, and the portions of the packaging film 209 located on both sides of the folding line are the two connecting portions 207 .
可以理解的，封装袋201由一张封装膜209对折形成，可以省掉两个连接部207之间的接合工艺，由此节省工艺和制造成本。It can be understood that, the packaging bag 201 is formed by folding a piece of packaging film 209 in half, and the bonding process between the two connecting parts 207 can be omitted, thereby saving process and manufacturing costs.
在一些实施例中，两个连接部207为两个封装膜209。也即，封装袋201包括相对设置的两个封装膜209，每个封装膜209为一个连接部207。In some embodiments, the two connecting portions 207 are two encapsulation films 209 . That is, the packaging bag 201 includes two packaging films 209 disposed opposite to each other, and each packaging film 209 is a connecting portion 207 .
在一些实施例中，密封腔室208的腔壁包括沿第二方向相对设置的两个侧壁，至少一个密封腔室208的至少一个侧壁向封装袋201外部凹陷以形成凹坑210，凹坑210用于收容极芯组202。其中，第二方向为电池100的厚度方向。In some embodiments, the cavity wall of the sealing chamber 208 includes two side walls disposed opposite to each other along the second direction, and at least one side wall of at least one sealing chamber 208 is recessed to the outside of the packaging bag 201 to form a recess 210, the recess The pit 210 is used to accommodate the pole core group 202 . The second direction is the thickness direction of the battery 100 .
可以理解的，两个连接部207构成密封腔室208的沿第二方向相对设置的两个侧壁，至少一个连接部207向封装袋201外部凹陷以形成凹坑210，该凹坑210可以为极芯组202提供收容空间。当两个连接部207均形成凹坑210时，两个连接部207上形成的凹坑210可以相对设置，也可以间隔设置。It can be understood that the two connecting parts 207 constitute two side walls of the sealed chamber 208 that are oppositely arranged along the second direction, and at least one connecting part 207 is recessed to the outside of the packaging bag 201 to form a recess 210 , and the recess 210 may be The pole core group 202 provides a receiving space. When the two connecting parts 207 are formed with dimples 210, the dimples 210 formed on the two connecting parts 207 may be arranged opposite to each other, or may be arranged at intervals.
在本申请中，对于两个连接部207在预设位置接合的具体方式不作限定，可以通过扎带将两个连接部207在接合位置系在一起。在一些实施方式中，两个连接部207在预定位置热熔接合。也即，可将连接部207的接合位置加热熔化，然后压合在一起，无需其他零部件，即可将封装袋201内部分隔成多个密封腔室208，制备工艺相对简单。In the present application, the specific manner in which the two connecting parts 207 are joined at the preset position is not limited, and the two connecting parts 207 can be tied together at the joining position by a cable tie. In some embodiments, the two connecting portions 207 are thermally fused at predetermined locations. That is, the bonding position of the connecting portion 207 can be heated and melted, and then pressed together, without other parts, the interior of the packaging bag 201 can be divided into a plurality of sealed chambers 208, and the preparation process is relatively simple.
需要说明的是，在上述实施方式中，封装袋201上不额外设置注液口，电解液可以在两个连接部207完全接合之前注入。当然，也可以在封装袋201上额外设置注液口，两个连接部207在预设位置接合完后，再通过单独设置的注液口注入电解液。It should be noted that, in the above embodiment, the packaging bag 201 is not additionally provided with a liquid injection port, and the electrolyte can be injected before the two connecting parts 207 are completely joined. Of course, an additional liquid injection port may also be provided on the packaging bag 201, and after the two connecting portions 207 are joined at the preset positions, the electrolyte is injected through the separately provided liquid injection port.
在一些实施例中，串联连接的两个极芯组202中的一个极芯组202的第一电极引出部件204和另一个极芯组202的第二电极引出部件205的连接处埋设于两个连接部207对应的接合位置。也即，串联连接的两个极芯组202中的一个极芯组202的第一电极引出部件204和另一个极芯组202的第二电极引出部件205的连接处埋设于对应的封装部206内。In some embodiments, the connection between the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 of the two pole core groups 202 connected in series is embedded in the two pole core groups 202 in series. The joint position corresponding to the connecting portion 207 . That is, the connection between the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 in the two pole core groups 202 connected in series is embedded in the corresponding package part 206 Inside.
在实际应用中，例如，如图8所示，可以先将多个极芯组202进行串联，然后利用一整张封装膜209将串联的多个极芯组202包裹起来，比如可以将串联的多个极芯组202放置于封装膜209的一部分区域上(或者可以预先在封装膜209的一部分区域上开多个凹坑210，然后将串联的多个极芯组202置于对应的凹坑210内)，然后将封装膜209的另一部分区域朝向极芯组202的方向对折，之后通过热熔处理将两部分区域的封装膜209进行热熔结合，由此将串联的多个极芯组202封装在同一封装袋201内。In practical applications, for example, as shown in FIG. 8 , a plurality of pole core groups 202 can be connected in series first, and then a whole encapsulation film 209 can be used to wrap the series connected pole core groups 202 . A plurality of pole core groups 202 are placed on a part of the encapsulation film 209 (or a plurality of dimples 210 can be opened on a part of the encapsulation film 209 in advance, and then a plurality of pole core groups 202 connected in series are placed in the corresponding dimples. 210), and then fold another part of the encapsulation film 209 in the direction of the pole core group 202, and then heat-melt the encapsulation film 209 in the two parts by hot-melt treatment, thereby connecting the multiple pole core groups connected in series. 202 is packaged in the same packaging bag 201 .
其中，两个连接部207与第一电极引出部件204和/或第二电极引出部件205相对位置接合以将相邻两个极芯组主体203隔离，并且相邻两个极芯组202中的一个极芯组202的第一电极引出部件204和另一个极芯组202的第二电极引出部件205中的至少之一位于接 合位置。通过该种实施方式可将多个极芯组主体203之间隔离，避免多个极芯组202的电解液互相流通，多个极芯组202之间不会相互影响，且多个极芯组202中的电解液不会因电位差过大而分解，保证电池100的安全性和使用寿命。Wherein, the two connecting parts 207 are relatively positioned with the first electrode lead-out part 204 and/or the second electrode lead-out part 205 to isolate the two adjacent pole core group bodies 203, and the two adjacent pole core groups 202 At least one of the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 is located at the engaging position. Through this embodiment, the main bodies 203 of the plurality of pole core groups can be isolated to prevent the electrolytes of the plurality of pole core groups 202 from circulating each other, the plurality of pole core groups 202 will not affect each other, and the The electrolyte in 202 will not be decomposed due to excessive potential difference, so as to ensure the safety and service life of the battery 100 .
在一些实施例中，如图10所示，极芯串20包括多个封装袋201，极芯组202一一对应封装于封装袋201内，极芯组202包括第一电极引出部件204和第二电极引出部件205，极芯组202的第一电极引出部件204和第二电极引出部件205中的至少之一延伸出封装袋201。In some embodiments, as shown in FIG. 10 , the pole core string 20 includes a plurality of packaging bags 201 , the pole core groups 202 are packaged in the packaging bags 201 in a one-to-one correspondence, and the pole core group 202 includes a first electrode lead-out part 204 and a second Two electrode lead-out parts 205 , at least one of the first electrode lead-out part 204 and the second electrode lead-out part 205 of the pole core group 202 extends out of the packaging bag 201 .
串联连接的两个极芯组202中的一个极芯组202的第一电极引出部件204与另一个极芯组202的第二电极引出部件205连接，采样线302的第一端与第一电极引出部件204或第二电极引出部件205位于封装袋201外的部分连接。In the two pole core groups 202 connected in series, the first electrode lead-out part 204 of one pole core group 202 is connected to the second electrode lead-out part 205 of the other pole core group 202, and the first end of the sampling line 302 is connected to the first electrode Parts of the lead-out member 204 or the second electrode lead-out member 205 outside the packaging bag 201 are connected.
在另一些实施例中，串联连接的两个极芯组202中的一个极芯组202的第一电极引出部件204与另一个极芯组202的第二电极引出部件205通过位于封装袋201外的连接片连接，采样线302的第一端与连接片连接。In other embodiments, the first electrode lead-out part 204 of one pole core group 202 and the second electrode lead-out part 205 of the other pole core group 202 of the two pole core groups 202 connected in series pass through the outside of the packaging bag 201 The first end of the sampling line 302 is connected to the connecting piece.
在一些实施例中，封装袋201的材质可以为PET(Polyethylene terephthalate，聚对苯二甲酸乙二醇酯)、聚丙烯复合膜或铝塑膜。In some embodiments, the material of the packaging bag 201 may be PET (Polyethylene terephthalate, polyethylene terephthalate), polypropylene composite film or aluminum plastic film.
如图11所示，在本申请的另一个方面，提供了一种电池包300，其包括电池信息采集器200和上述的电池100，电池信息采集器200与电池100电连接。本申请提供的电池包300，其中的电池100，通过在壳体10内设置采样组件30和插针组件40，采样组件30中的电路板301可通过采样线302对每个极芯组202进行采样，并通过插针组件40中的采样插针401将采集到的信息传送至电池信息采集器200，以便于了解电池100内部各个极芯组202的工作状态，有利于提高电池100使用的安全性，进而可提高电池包300的安全性。As shown in FIG. 11 , in another aspect of the present application, a battery pack 300 is provided, which includes a battery information collector 200 and the above-mentioned battery 100 , and the battery information collector 200 is electrically connected to the battery 100 . In the battery pack 300 provided by the present application, in the battery 100 , the sampling assembly 30 and the pin assembly 40 are arranged in the casing 10 , and the circuit board 301 in the sampling assembly 30 can conduct the sampling line 302 for each pole core group 202 . sampling, and transmit the collected information to the battery information collector 200 through the sampling pins 401 in the pin assembly 40, so as to understand the working status of each pole core group 202 inside the battery 100, which is beneficial to improve the safety of the battery 100. performance, thereby improving the safety of the battery pack 300 .
再一方面，如图12所示，本申请还提供了一种电动车400，其包括车体和上述的电池包300，电池包300通过固定于车体上。本申请提供的电动车400，其中的电池包300具有较高的安全性，从而使得电动车具有较高的使用安全性。In another aspect, as shown in FIG. 12 , the present application further provides an electric vehicle 400 , which includes a vehicle body and the above-mentioned battery pack 300 , and the battery pack 300 is fixed on the vehicle body by passing through. In the electric vehicle 400 provided by the present application, the battery pack 300 therein has higher safety, so that the electric vehicle has higher safety in use.
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific situations.
在本说明书的描述中，参考术语“实施例”、“具体实施例”、“示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合 适的方式结合。In the description of this specification, a description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one of the present application in one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (16)

  1. 一种电池，其特征在于，所述电池包括：A battery, characterized in that the battery comprises:
    壳体；case;
    极芯串，所述极芯串设于所述壳体内，所述极芯串包括封装袋及多个串联的极芯组，所述极芯组封装于所述封装袋内；a pole core string, the pole core string is arranged in the housing, the pole core string includes a packaging bag and a plurality of pole core groups connected in series, and the pole core group is packaged in the packaging bag;
    采样组件，所述采样组件设于所述壳体内，所述采样组件包括电路板及多个采样线，所述电路板上设有多个第一线路，所述采样线的第一端与对应的所述极芯组电连接，所述采样线的第二端与对应的所述第一线路电连接；以及，A sampling assembly, the sampling assembly is arranged in the casing, the sampling assembly includes a circuit board and a plurality of sampling lines, the circuit board is provided with a plurality of first lines, and the first ends of the sampling lines correspond to The pole core group is electrically connected, and the second end of the sampling line is electrically connected with the corresponding first line; and,
    插针组件，所述插针组件包括多个采样插针，所述采样插针用于贯穿于所述壳体以电连接对应的第一线路与电池信息采集器。A pin assembly, the pin assembly includes a plurality of sampling pins, the sampling pins are used to penetrate through the housing to electrically connect the corresponding first circuit and the battery information collector.
  2. 根据权利要求1所述的电池，其特征在于，所述电路板与所述插针组件固定连接。The battery according to claim 1, wherein the circuit board is fixedly connected to the pin assembly.
  3. 根据权利要求1或2所述的电池，其特征在于，所述电路板上还设有多个第一焊盘和多个第二焊盘，所述第一线路连接于对应的第一焊盘和第二焊盘之间，所述采样线的第二端与对应的第一焊盘焊接，所述采样插针与对应的第二焊盘焊接。The battery according to claim 1 or 2, wherein a plurality of first pads and a plurality of second pads are further provided on the circuit board, and the first lines are connected to the corresponding first pads and the second pad, the second end of the sampling line is welded to the corresponding first pad, and the sampling pin is welded to the corresponding second pad.
  4. 根据权利要求1-3中任意一项所述的电池，其特征在于，所述插针组件还包括设于壳体内的安装座，所述安装座套设于多个所述采样插针上。The battery according to any one of claims 1-3, wherein the pin assembly further comprises a mounting seat provided in the housing, and the mounting seat is sleeved on the plurality of sampling pins.
  5. 根据权利要求1-4中任意一项所述的电池，其特征在于，所述电池还包括陶瓷密封件，多个所述采样插针固定于所述陶瓷密封件上，所述陶瓷密封件固定于所述壳体上。The battery according to any one of claims 1-4, characterized in that, the battery further comprises a ceramic sealing member, the plurality of sampling pins are fixed on the ceramic sealing member, and the ceramic sealing member is fixed on the casing.
  6. 根据权利要求5所述的电池，其特征在于，所述陶瓷密封件上设有多个贯穿孔，所述采样插针固定于对应的所述贯穿孔中。The battery according to claim 5, wherein the ceramic sealing member is provided with a plurality of through holes, and the sampling pins are fixed in the corresponding through holes.
  7. 根据权利要求5或6所述的电池，其特征在于，所述电池还包括连接套，所述陶瓷密封件通过所述连接套固定于所述壳体上。The battery according to claim 5 or 6, characterized in that, the battery further comprises a connecting sleeve, and the ceramic sealing member is fixed on the casing through the connecting sleeve.
  8. 根据权利要求7所述的电池，其特征在于，所述壳体的外侧上设有凹槽，所述凹槽的底壁上设有采样通孔，所述连接套固定于凹槽内，多个所述采样插针贯穿于所述采样通孔和所述连接套，所述陶瓷密封件固定于所述连接套远离所述壳体的一端。The battery according to claim 7, wherein a groove is formed on the outer side of the casing, a sampling through hole is formed on the bottom wall of the groove, and the connecting sleeve is fixed in the groove, and there are many Each of the sampling pins penetrates through the sampling through hole and the connection sleeve, and the ceramic seal is fixed to an end of the connection sleeve away from the housing.
  9. 根据权利要求1-8中任意一项所述的电池，其特征在于，所述极芯串中的多个极芯组沿第一方向排布，所述第一方向为所述电池的长度方向，所述电池的长度为400mm-2500mm。The battery according to any one of claims 1-8, wherein a plurality of pole core groups in the pole core string are arranged along a first direction, and the first direction is a length direction of the battery , the length of the battery is 400mm-2500mm.
  10. 根据权利要求1-9中任意一项所述的电池，其特征在于，所述电池包括多个相互电连接的极芯串，多个所述极芯串沿第二方向排布，所述第二方向为所述电池的厚度方向。The battery according to any one of claims 1 to 9, wherein the battery comprises a plurality of pole core strings that are electrically connected to each other, the plurality of pole core strings are arranged along the second direction, and the first The two directions are the thickness directions of the battery.
  11. 根据权利要求1-10中任意一项所述的电池，其特征在于，所述电路板上还设有第 二线路，所述采样组件还包括信号采集元件和采集线，所述信号采集元件通过所述采集线与所述第二线路电连接。The battery according to any one of claims 1-10, wherein a second circuit is further provided on the circuit board, the sampling assembly further includes a signal acquisition element and a acquisition line, and the signal acquisition element passes through the The collection line is electrically connected to the second line.
  12. 根据权利要求11所述的电池，其特征在于，所述信号采集元件为温度感应元件、湿度感应元件、压力感应元件、气味感应元件中的至少一种。The battery according to claim 11, wherein the signal collection element is at least one of a temperature sensing element, a humidity sensing element, a pressure sensing element, and an odor sensing element.
  13. 根据权利要求11或12所述的电池，其特征在于，所述采样线和所述采集线中的至少之一为FFC。The battery according to claim 11 or 12, wherein at least one of the sampling line and the acquisition line is FFC.
  14. 根据权利要求1-13中任意一项所述的电池，其特征在于，所述壳体包括盖板及具有开口的壳本体，所述盖板封闭所述壳本体的开口，以形成密封的容纳腔，所述极芯串设于所述容纳腔内；多个所述采样插针固定并贯穿于所述盖板。The battery according to any one of claims 1-13, wherein the case comprises a cover plate and a case body having an opening, and the cover plate closes the opening of the case body to form a sealed container A cavity, the pole core is arranged in series in the accommodating cavity; a plurality of the sampling pins are fixed and penetrate through the cover plate.
  15. 一种电池包，其特征在于，包括电池信息采集器和如权利要求1-14任一项所述的电池，所述电池信息采集器与所述电池电连接。A battery pack, characterized by comprising a battery information collector and the battery according to any one of claims 1-14, wherein the battery information collector is electrically connected to the battery.
  16. 一种电动车，其特征在于，包括如权利要求15所述的电池包。An electric vehicle, characterized by comprising the battery pack according to claim 15 .
PCT/CN2021/107069 2020-09-27 2021-07-19 Battery, battery pack and electric vehicle WO2022062607A1 (en)

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CN114361629B (en) 2023-08-08

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