CN112582759B - Battery module and electric automobile - Google Patents
Battery module and electric automobile Download PDFInfo
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- CN112582759B CN112582759B CN201910943182.9A CN201910943182A CN112582759B CN 112582759 B CN112582759 B CN 112582759B CN 201910943182 A CN201910943182 A CN 201910943182A CN 112582759 B CN112582759 B CN 112582759B
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- battery
- conductive
- acquisition device
- battery cell
- battery module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- 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
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery module and an electric automobile, wherein the battery module comprises: the battery comprises a battery cell and a battery cell body, wherein the battery cell comprises a conductive shell and the battery cell body is positioned in the conductive shell, and a positive pole column and a negative pole column are respectively arranged at two ends of the battery cell body along the length direction of the battery cell; the voltage acquisition device is positioned on one side of the battery cell in the length direction, the voltage acquisition device is respectively electrically connected with the pole of the battery cell body adjacent to the voltage acquisition device and the conductive shell, the pole far away from the voltage acquisition device is electrically connected with the conductive shell, and the conductive shell is insulated from the pole adjacent to the voltage acquisition device. According to the battery module, the energy density of the battery module is improved, the structure of the voltage acquisition device is simplified, and the safety of the battery module is improved.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery module and an electric automobile.
Background
With the development of electric vehicles, the whole industry has made higher requirements on the energy density and the safety of the battery module, and the structure of the battery module in the related art is complex, the energy density is low, and the structure of the voltage acquisition device is complex, so how to simplify the structure of the voltage acquisition device while improving the energy density of the battery module is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the present invention provides a battery module, which can improve the energy density of the battery module and simplify the structure of the voltage collecting device.
The invention also provides a power automobile with the battery module.
A battery module according to a first aspect of the invention includes: the battery comprises a battery cell, wherein the battery cell comprises a conductive shell and a battery cell body positioned in the conductive shell, and a positive pole column and a negative pole column are respectively arranged at two ends of the battery cell body along the length direction of the battery cell; the voltage acquisition device is positioned on one side of the battery cell in the length direction, the voltage acquisition device is respectively electrically connected with the pole of the battery cell body adjacent to the voltage acquisition device and the conductive shell, the pole far away from the voltage acquisition device is electrically connected with the conductive shell, and the conductive shell is insulated from the pole adjacent to the voltage acquisition device.
According to the battery module of the first aspect of the present invention, on one hand, the distance between the positive electrode post and the negative electrode post can be increased by disposing the positive electrode post and the negative electrode post at the two ends of the battery cell in the length direction, so that the mounting parts such as the mounting plate of the battery cell can be saved, compared to the conventional battery cell in which the positive electrode post and the negative electrode post are disposed at the same end, the structure of the battery module can be simplified, and the energy density of the battery module can be improved, on the other hand, by disposing the voltage collecting device at one side of the battery cell in the length direction, and electrically connecting the voltage collecting device with the electrode post of the battery cell body adjacent to the voltage collecting device and the conductive housing, respectively, so that the voltage collecting device does not need to be directly electrically connected to the electrode post far from the voltage collecting device, the structure of the voltage collecting device can be simplified, and the voltage collecting of the positive electrode post and the negative electrode post of the battery cell body can be collected by the voltage collecting device, the safety is high.
In some embodiments of the present invention, the battery cells are multiple, and the battery cells are arranged at intervals in a direction perpendicular to a length direction of the battery cells, and polarities of the poles on the same side of two adjacent battery cells are opposite; the battery module further comprises a plurality of first conductive connecting sheets and a plurality of second conductive connecting sheets, each first conductive connecting sheet is connected with the adjacent poles of the two adjacent battery cells, the adjacent poles are close to the voltage acquisition device, each second conductive connecting sheet is connected with the adjacent poles of the two battery cells, the two adjacent battery cells are far away from the voltage acquisition device, so that the battery cells are connected in series, the battery module comprises two leading-out poles, one leading-out pole is limited by one pole of one of the two battery cells, the two leading-out poles are not connected with the first conductive connecting sheets and the second conductive connecting sheets, and the two leading-out poles are different in polarity; the voltage acquisition device comprises a plurality of first wiring terminals and a second wiring terminal, the first wiring terminals are connected with the first conductive connecting sheets in a one-to-one correspondence mode, and the second wiring terminal is connected with one of the leading-out pole columns adjacent to the voltage acquisition device.
In some embodiments of the present invention, the voltage collecting device includes a plurality of third connection terminals and a fourth connection terminal, the plurality of third connection terminals correspond to the plurality of second conductive connection pads one to one, each of the third connection terminals is connected to one of the conductive housings of the two battery cells connected to the second conductive connection pad, and the fourth connection terminal is connected to the conductive housing of the battery cell having another lead-out terminal.
In some embodiments of the present invention, the battery module includes a plurality of caps corresponding to the plurality of second conductive connecting pads, each of the caps is disposed on one of the conductive housings of the two battery cells connected to the second conductive connecting pads and adjacent to the voltage collecting device, and the third connecting terminal is connected to the cap.
In some embodiments of the invention, the caps are welded and/or riveted to the respective conductive housings.
In some embodiments of the present invention, the first connection terminal to the fourth connection terminal are each a nickel piece.
In some embodiments of the present invention, an insulating layer is disposed between the conductive shells of any two adjacent battery cells.
In some embodiments of the present invention, an included angle between a central connection line of two terminals connected by the first conductive connection tab and an interval direction of the plurality of battery cells is α, where α satisfies: alpha is more than or equal to 10 degrees and less than or equal to 80 degrees.
In some embodiments of the present invention, the interval between the positive electrode post and the negative electrode post connected by the first conductive connecting sheet on the central connecting line of the positive electrode post and the negative electrode post is h, where h satisfies: h is greater than or equal to 7.8 mm.
An electric vehicle according to a second aspect of the invention includes the battery module according to the first aspect of the invention.
According to the electric vehicle of the second aspect of the present invention, by providing the battery module of the first aspect, unnecessary vehicle weight can be reduced, and the safety of the electric vehicle can be improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is an exploded schematic view of a partial structure of a battery module according to one embodiment of the present invention;
fig. 2 is a schematic plan view of a battery module according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken at A-A in FIG. 2;
FIG. 4 is an enlarged view taken at B in FIG. 3;
FIG. 5 is an enlarged view at C of FIG. 2 with the circuit board removed;
fig. 6 is a schematic view of a battery module according to an embodiment of the present invention.
Reference numerals:
the battery module 100:
an electric core 1; a cell body 11; a pole 12; a positive electrode post 121; the negative electrode post 122; a conductive housing 13; an extraction pole 14;
a voltage acquisition device 2; a first connection terminal 21; a second connection terminal 22; a third connection terminal 23; a fourth connection terminal 24;
a first conductive connection pad 3;
a second conductive connection pad 4;
a cap 5;
an insulating layer 6;
a circuit board 7.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.
Referring to fig. 1, a battery module 100 according to a first aspect of the present invention may include a battery cell 1 and a voltage acquisition device 2.
Referring to fig. 2 and fig. 3, electric core 1 includes electrically conductive casing 13 and the electric core body 11 that is located electrically conductive casing 13, length direction along electric core 1, the both ends of electric core body 11 are equipped with anodal utmost point post 121 and negative pole post 122 respectively, it can be understood, through setting up anodal utmost point post 121 and negative pole post 122 respectively at the ascending both ends of length direction of electric core 1 (refer to fig. 6), can increase the distance between anodal utmost point post 121 and the negative pole post 122, thereby compare the traditional electric core with anodal utmost point post and negative pole post setting the same one end on length direction of electric core, the mounting member that can save is for example the mounting panel etc. of electric core, can simplify battery module 100's structure, reduce battery module 100's weight, be favorable to promoting battery module 100's energy density.
Referring to fig. 1, the voltage acquisition device 2 is located on one side of the electrical core 1 in the length direction, the voltage acquisition device 2 is electrically connected to the terminal 12 of the electrical core body 11 adjacent to the voltage acquisition device 2 and the conductive casing 13, the terminal 12 far away from the voltage acquisition device 2 is electrically connected to the conductive casing 13, and the conductive casing 13 is insulated from the terminal 12 adjacent to the voltage acquisition device 2. For example, the conductive case 13 has notches at both ends in the longitudinal direction, the positive electrode post 121 and the negative electrode post 122 respectively penetrate through the notches, the positive electrode post 121 is electrically connected to the conductive case 13, and the negative electrode post 122 is insulated (see fig. 5).
It can be understood that, the voltage collecting device 2 is to be connected with the positive pole post 121 and the negative pole post 122 of the electric core 1 electrically respectively to collect voltage, and for the electric core 1 where the positive pole post 121 and the negative pole post 122 are located at two sides of the electric core 1 in the length direction, when the voltage collecting device 2 is located at one side of the electric core 1 in the length direction, the voltage collecting device 2 will have to have a large distance with the pole post 12 at the other side of the electric core 1 in the length direction, and can hardly collect voltage according to the conventional design, and the structure is complex.
According to the battery module 100 of the present invention, it is creatively proposed that the casing of the battery cell 1 is the conductive casing 13, the voltage collecting device 2 is electrically connected to the terminal 12 of the battery cell body 11 adjacent to the voltage collecting device 2 and the conductive casing 13, and the terminal 12 far away from the voltage collecting device 2 is electrically connected to the conductive casing 13, so that it is not necessary to directly electrically connect the voltage collecting device 2 to the terminal 12 far away from the voltage collecting device 2, the structure of the voltage collecting device 2 can be simplified, the voltage collecting device 2 is convenient to collect the voltages of the positive and negative terminals 12 of the battery cell body 11, and the safety is high.
According to the battery module 100 of the first aspect of the present invention, on one hand, by disposing the positive electrode post 121 and the negative electrode post 122 at two ends of the battery cell 1 in the length direction, the distance between the positive electrode post 121 and the negative electrode post 122 can be increased, so as to simplify the structure of the battery module 100, and at the same time, to facilitate increasing the energy density of the battery module 100, compared with the conventional battery cell 1 in which the positive electrode post 121 and the negative electrode post 122 are disposed at the same end, by saving mounting components such as a mounting plate of the battery cell 1, and the like, and by positioning the voltage collecting device 2 at one side of the battery cell 1 in the length direction, and by electrically connecting the voltage collecting device 2 to the terminal 12 of the voltage collecting device 2 adjacent to the battery cell body 11 and the conductive housing 13, respectively, so as to avoid directly electrically connecting the voltage collecting device 2 to the terminal 12 far away from the voltage collecting device 2, the structure of the voltage collecting device 2 can be simplified, the voltage collection device 2 is convenient to collect the voltages of the anode pole 121 and the cathode pole 122, and the safety is high.
In some embodiments of the present invention, referring to fig. 6, a plurality of battery cells 1 are arranged at intervals in a direction perpendicular to a length direction of the battery cells 1 (e.g., a left-right direction as shown in fig. 1), and the polarities of the poles 12 on the same side of two adjacent battery cells 1 are opposite.
Specifically, referring to fig. 6, the battery module 100 further includes a plurality of first conductive connection pads 3 and a plurality of second conductive connection pads 4, the plurality of first conductive connection pads 3 and the plurality of second conductive connection pads 4 are respectively located at two sides of the battery cells 1 in the length direction, in the spacing direction of the battery cells 1, the plurality of first conductive connection pads 3 and the plurality of second conductive connection pads 4 are alternately arranged, each first conductive connection pad 3 is connected to the terminal 12 of the adjacent two battery cells 1, which is adjacent to the voltage acquisition device 2, and each second conductive connection pad 4 is connected to the terminal 12, which is far away from the voltage acquisition device 2, of the adjacent two battery cells 1, so as to connect the plurality of battery cells 1 in series, the battery module 100 includes two extraction terminals 14, one extraction terminal 14 is defined by one terminal 12 of one of the two battery cells 1 which are farthest away from the other battery cell 1, the other extraction terminal 14 is defined by one terminal 12 of the other battery cell 1, the two leading-out poles 14 are not connected with the first conductive connecting sheet 3 and the second conductive connecting sheet 4, and the two leading-out poles 14 have different polarities.
For example, as shown in fig. 6, when the number of the battery cells 1 is odd, the terminal 12 at the front end of the leftmost battery cell 1 defines one extraction terminal 14, the terminal 12 at the rear end of the rightmost battery cell 1 defines another extraction terminal 14, and the polarities of the two extraction terminals 14 are opposite; for another example, when the number of the battery cells 1 is an even number, the two extraction poles 14 of the battery cells 1 are located at the same end in the length direction of the battery cells 1, and the polarities of the two extraction poles 14 are opposite.
Specifically, referring to fig. 6, the voltage collecting device 2 includes a plurality of first connection terminals 21 and a second connection terminal 22, the plurality of first connection terminals 21 are connected to the plurality of first conductive connection pads 3 in a one-to-one correspondence, and the second connection terminal 22 is connected to one of the extraction poles 14 adjacent to the voltage collecting device 2. Therefore, the plurality of first connecting terminals 21 are connected with the plurality of first conductive connecting sheets 3 in a one-to-one correspondence manner, so that the number of voltage collecting points is reduced.
Further, referring to fig. 6, the voltage acquisition device 2 includes a plurality of third connection terminals 23 and a fourth connection terminal 24, the plurality of third connection terminals 23 correspond to the plurality of second conductive connection pads 4 one to one, each third connection terminal 23 is connected to one of the conductive housings 13 of the two battery cells 1 connected to the second conductive connection pad 4, and the fourth connection terminal 24 is connected to the conductive housing 13 of the battery cell 1 having the other extraction terminal 14. Therefore, the voltage acquisition device 2 can acquire the voltage of each battery cell 1 through acquisition, and is favorable for ensuring the reliable work of a plurality of battery cells 1.
Further, referring to fig. 2 and 6, the battery module 100 includes a plurality of caps 5, the plurality of caps 5 correspond to the plurality of second conductive connecting pieces 4, each cap 5 is disposed on one of the conductive housings 13 of the two battery cells 1 connected to the second conductive connecting pieces 4 and adjacent to the voltage collecting device 2, and the third connection terminal 23 is connected to the cap 5. It should be noted that, since each cap 5 is provided on one of the conductive cases 13 of the two battery cells 1 connected to the second conductive connecting piece 4, each cap 5 has the same potential as the second conductive connecting piece 4 corresponding thereto.
It can be understood that, because the battery cell 1 itself is relatively weak, the direct connection between the third connection terminal 23 and the conductive shell 13 may cause the conductive shell 13 to fail, so that the cap 5 is disposed on the conductive shell 13 of the battery cell 1, the cap 5 is charged, and the third connection terminal 23 is connected to the cap 5, thereby being beneficial to avoiding the failure of the conductive shell 13 and being beneficial to the reliability of the voltage acquisition device 2 for acquiring voltage.
In some embodiments of the invention, as illustrated with reference to fig. 3 and 4, the caps 5 are welded and/or riveted to the respective conductive housings 13. In other words, the caps 5 and the corresponding conductive housings 13 are welded together, or the caps 5 and the corresponding conductive housings 13 are riveted together and then welded together. Thereby, the connection between the cap 5 and the corresponding conductive housing 13 can be made reliable. For example, in some examples, the cap 5 and the corresponding conductive housing 13 are riveted and then laser-welded, and the third connection terminal 23 is welded to the cap 5.
In some examples, as shown in fig. 6, the battery cell 1 module includes thirteen battery cells 1, the thirteen battery cells 1 are arranged at intervals in the left-right direction, the battery module 100 further includes six first conductive connection pieces 3 and six second conductive connection pieces 4, each first conductive connection piece 3 connects the terminal 12 at the front end of two adjacent battery cells 1, and each second conductive connection piece 4 connects the terminal 12 at the rear end of two adjacent battery cells 1, so that the plurality of battery cells 1 are connected in series. Optionally, the first conductive connecting pad 3 and the second conductive connecting pad 4 are both aluminum connecting pads.
Further, the battery module 100 includes two extraction poles 14, one of the extraction poles 14 is defined by the negative pole 122 at the front end of the leftmost battery cell 1, and the other extraction pole 14 is defined by the positive pole 121 at the rear end of the rightmost battery cell 1, and then the negative pole of the battery cell 1 module is extracted from the extraction pole 14 on the left, and the positive pole of the battery cell 1 module is extracted from the extraction pole 14 on the right. Six caps 5 correspond to the six second conductive connecting pieces 4, and each cap 5 is provided on one of the conductive housings 13 of the two battery cells 1 connected to the second conductive connecting pieces 4 on the left side and adjacent to the voltage collecting device 2.
As shown in fig. 6, the voltage collecting device 2 includes a second connection terminal 22, six first connection terminals 21, six third connection terminals 23, and a fourth connection terminal 24, the second connection terminal 22 is connected to the terminal 12 at the front end of the leftmost electric core 1, the six first connection terminals 21 are connected to the six first conductive connection pads 3 in a one-to-one correspondence manner, the six third connection terminals 23 are connected to the six caps 5 in a one-to-one correspondence manner, and the fourth connection terminal 24 is connected to the terminal 12 at the front end of the rightmost electric core 1.
For example, as shown in fig. 6, the potential acquired by the voltage acquisition device 2 through the second connection terminal 22 is V1, the potential acquired by the voltage acquisition device 2 through the first third connection terminal 23 from the left is V2, the potential acquired by the voltage acquisition device through the first connection terminal 21 from the left is V3, the potential acquired by the voltage acquisition device 2 through the second third connection terminal 23 from the left is V4, the potential acquired by the voltage acquisition device through the second first connection terminal 21 from the left is V5, so that V6, V7, V8, V9, V10, V11, V12, and V13 are sequentially acquired, and the potential acquired by the voltage acquisition device 2 through the fourth connection terminal 24 is V14.
The acquisition voltage of the first battery cell 1 from the left is V2-V1, the acquisition voltage of the second battery cell 1 from the left is V3-V2, the acquisition voltage of the third battery cell 1 from the left is V4-V3, the acquisition voltage of the fourth battery cell 1 from the left is V6-V5, the acquisition voltage of the fifth battery cell 1 from the left is V7-V6, … …, and the acquisition voltage of the thirteenth battery cell 1 from the left is V14-V13, so that the voltage of each battery cell 1 can be acquired, and reliable operation of the battery cell 1 module is guaranteed.
Alternatively, the first to fourth connection terminals 21 to 24 are each a nickel piece. Therefore, the electric conductivity of the first connecting terminal 21 to the fourth connecting terminal 24 can be stabilized, and the reliability of voltage collection of the voltage collection device 2 can be ensured.
In some embodiments of the present invention, referring to fig. 6, an insulating layer 6 is disposed between the conductive housings 13 of any two adjacent battery cells 1. It can be understood that, although the conductive housing 13 is electrically connected to the pole 12 far away from the voltage acquisition device 2, the conductive housings 13 of any two adjacent battery cells 1 are not electrically conductive with each other by the insulating layer 6, so that short circuit between the battery cells 1 can be avoided.
In a further embodiment of the present invention, as shown in fig. 1, the battery module 100 further includes a circuit board 7, where the circuit board 7 may be a flexible circuit board, the voltage acquisition device 2 is disposed on the circuit board 7, the circuit board 7 is suitable for being connected between the battery cells 1 and a battery management system, and the battery management system may obtain signals of voltages and/or temperatures of the plurality of battery cells 1 through the circuit board 7, so that the battery management system monitors the plurality of battery cells 11, for example, the battery management system may monitor whether charging and discharging of the plurality of battery cells 1 are normal, and ensure that the plurality of battery cells 11 operate normally and reliably, which is beneficial to improving the reliability of the battery module 100.
In some embodiments of the present invention, as shown in fig. 5, an included angle between a central connecting line of two poles 12 connected by the first conductive connecting sheet 3 and the spacing direction of the plurality of battery cells 1 is α, where α satisfies: alpha is more than or equal to 10 degrees and less than or equal to 80 degrees. For example, α may be 30 °, or 45 °, or 50 °, etc., but is not limited thereto.
It can be understood that by making α greater than or equal to 10 ° and less than or equal to 80 °, the two poles 12 connected by the first conductive connecting sheet 3 can be staggered in the arrangement direction of the battery core 1, and the air gap between the two poles 12 connected by the first conductive connecting sheet 3 can be increased, so that the creepage distance between the battery cores 1 (creepage distance refers to the creepage area between two conductive parts measured along the insulating surface, under different use conditions, because the insulating material around the conductor is polarized, the insulating material presents a electrification phenomenon) can meet the design requirements such as national standard requirements, and at the same time, even if the external dimension of the battery core 1 is small, the creepage distance between the battery cores 1 can be effectively increased by the above arrangement mode of the present invention, so as to improve the safety of the battery module 100, make battery module 100's electric core 1 have certain design flexibility, avoid electric core 1's setting to receive certain restriction, be favorable to promoting battery module 100's practicality and suitability.
In some embodiments of the invention, as shown in fig. 5, the positive electrode post 121 and the negative electrode post 122 connected by the first conductive connecting piece 3 have an interval h on the central axis of the positive electrode post 121 and the negative electrode post 122, where h satisfies: h is greater than or equal to 7.8 mm. Therefore, the creepage distance between the connected battery cores 1 is further ensured to meet the national standard requirement. For example, h can be 7.8mm, or 8.4mm, or 9mm, etc., but is not limited thereto.
The electric vehicle according to the second aspect of the present invention includes the battery module 100 according to the first aspect of the present invention.
According to the electric vehicle of the second aspect of the present invention, by providing the battery module 100 of the first aspect of the present invention, unnecessary vehicle weight can be reduced, and the safety of the electric vehicle can be improved.
Other configurations and operations of the electric vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the invention 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 to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A battery module, comprising:
the battery comprises a battery cell and a battery cell body, wherein the battery cell comprises a conductive shell and the battery cell body is positioned in the conductive shell, and a positive pole column and a negative pole column are respectively arranged at two ends of the battery cell body along the length direction of the battery cell;
the voltage acquisition device is positioned on one side of the battery cell in the length direction, the voltage acquisition device is respectively and electrically connected with a pole of the battery cell body adjacent to the voltage acquisition device and the conductive shell, a pole far away from the voltage acquisition device is electrically connected with the conductive shell, and the conductive shell is insulated from the pole adjacent to the voltage acquisition device;
the battery comprises a plurality of battery cores, wherein the battery cores are arranged at intervals in a direction perpendicular to the length direction of the battery cores, and the polarities of the polar columns on the same side of two adjacent battery cores are opposite;
the battery module further comprises a plurality of first conductive connecting sheets and a plurality of second conductive connecting sheets, each first conductive connecting sheet is connected with the adjacent poles of the two adjacent battery cells, the adjacent poles are close to the voltage acquisition device, each second conductive connecting sheet is connected with the adjacent poles of the two battery cells, the two adjacent battery cells are far away from the voltage acquisition device, so that the battery cells are connected in series, the battery module comprises two leading-out poles, one leading-out pole is limited by one pole of one of the two battery cells, the two leading-out poles are not connected with the first conductive connecting sheets and the second conductive connecting sheets, and the two leading-out poles are different in polarity;
the voltage acquisition device comprises a plurality of first wiring terminals and a second wiring terminal, the first wiring terminals are correspondingly connected with the first conductive connecting sheets one by one, and the second wiring terminal is connected with one of the leading-out pole columns adjacent to the voltage acquisition device;
the voltage acquisition device comprises a plurality of third wiring terminals and a fourth wiring terminal, the plurality of third wiring terminals correspond to the plurality of second conductive connecting sheets one by one, each third wiring terminal is connected with one of the two conductive shells of the battery cell, which are connected with the second conductive connecting sheets, and the fourth wiring terminal is connected with the conductive shell of the battery cell, which is provided with another leading-out pole.
2. The battery module of claim 1, wherein the battery module comprises a plurality of caps corresponding to the plurality of second conductive tabs, each cap being disposed on one of the conductive housings of two of the cells connected to the second conductive tabs and adjacent to the voltage collecting device, and the third terminal is connected to the cap.
3. The battery module according to claim 2, wherein the caps are welded and/or riveted to the corresponding conductive cases.
4. The battery module according to claim 2, wherein the first to fourth connection terminals are each a nickel member.
5. The battery module according to claim 1, wherein an insulating layer is disposed between the conductive housings of any two adjacent battery cells.
6. The battery module according to claim 1, wherein an included angle between a central connecting line of two poles connected by the first conductive connecting sheet and the interval direction of the plurality of battery cells is α, and α satisfies: alpha is more than or equal to 10 degrees and less than or equal to 80 degrees.
7. The battery module according to claim 1, wherein the interval between the positive electrode post and the negative electrode post connected by the first conductive connecting sheet on the central connecting line of the positive electrode post and the negative electrode post is h, and h satisfies: h is greater than or equal to 7.8 mm.
8. An electric vehicle characterized by comprising the battery module according to any one of claims 1 to 7.
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| CN217134519U (en) * | 2022-03-07 | 2022-08-05 | 比亚迪股份有限公司 | Battery module, battery package and vehicle |
| CN217009508U (en) * | 2022-04-12 | 2022-07-19 | 浙江极氪智能科技有限公司 | Battery module and car |
| CN115133233B (en) * | 2022-05-27 | 2023-09-08 | 孚能科技(赣州)股份有限公司 | Battery core pole column, battery core and battery module |
| CN115036653A (en) * | 2022-06-15 | 2022-09-09 | 浙江极氪智能科技有限公司 | Battery cell module, battery pack and new energy automobile |
| WO2024065961A1 (en) * | 2022-09-30 | 2024-04-04 | 湖北亿纬动力有限公司 | Battery module and battery pack |
| CN115377615B (en) * | 2022-10-21 | 2023-01-24 | 楚能新能源股份有限公司 | Blade battery, battery module and battery module assembly method |
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