WO2023143084A1 - 电池控制电路、电池及电子设备 - Google Patents

电池控制电路、电池及电子设备 Download PDF

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Publication number
WO2023143084A1
WO2023143084A1 PCT/CN2023/071742 CN2023071742W WO2023143084A1 WO 2023143084 A1 WO2023143084 A1 WO 2023143084A1 CN 2023071742 W CN2023071742 W CN 2023071742W WO 2023143084 A1 WO2023143084 A1 WO 2023143084A1
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WIPO (PCT)
Prior art keywords
battery
switch
terminal
positive
unit
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PCT/CN2023/071742
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English (en)
French (fr)
Inventor
韩朋伟
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比亚迪股份有限公司
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Publication of WO2023143084A1 publication Critical patent/WO2023143084A1/zh

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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
    • 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
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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 battery field, in particular to a battery control circuit, a battery and electronic equipment.
  • the existing fast charging design takes advantage of the advantages of the three-pole ear cell, which can effectively shorten the charging path of the large current on the charging protection device, thereby reducing impedance and reducing heat generation.
  • the specific implementation method is that there are two flexible printed circuit boards (FPC, flexible printed circuit) on the charging protection device connected to the mobile phone system, and the positive poles of the two FPCs are respectively connected to the positive nickel sheet of the charging protection device through the shortest path.
  • the negative electrode of the FPC is respectively connected to a switch MOS, and then connected to the negative nickel sheet of the charging protection device to form a charging and discharging circuit.
  • the currently developed battery because the metal shell of the battery cell is negative polarity, and the electronic equipment cabin (that is, the area where the battery is installed) is connected to the ground of the electronic equipment system, and the system ground has negative polarity. Therefore, the electronic equipment cabin It also has a negative polarity.
  • the metal shell must adopt a full insulation scheme, that is, the thickness of the battery cell is increased, which loses the capacity of the battery cell.
  • This application aims to solve at least one of the technical problems existing in the prior art.
  • the first aspect of the present application provides a battery control circuit, including a first connection terminal, a second connection terminal, and a circuit protection module.
  • the first connection end is used to connect with the cell of the battery, and the first connection end includes a positive pole, a first negative pole and a second negative pole.
  • the second connection terminal is used to connect with the device outside the battery, and the second connection terminal includes a first positive terminal, a first negative terminal, a second positive terminal and a second negative terminal.
  • the circuit protection module includes a first switch unit, a second switch unit, and a control unit. The first switch unit is connected between the positive terminal and the first positive terminal.
  • the positive pole, the first switch unit are connected to the first positive pole, and the first negative pole is connected to the first negative pole to form a first conductive path.
  • the second switch unit is connected between the positive terminal and the second positive terminal.
  • the positive pole, the second switch unit, and the second positive pole are connected, and the second negative pole is connected with the second negative pole to form a second conductive path.
  • the control unit is used for controlling the turn-on or turn-off of the first switch unit and controlling the turn-on or turn-off of the second switch unit.
  • the difference between the voltage output by the control unit and the voltage between the positive electrode is greater than or equal to 4V.
  • the circuit protection module further includes a current sampling unit, the current sampling unit is connected in series between the first positive terminal and the positive terminal, and the current sampling unit is further connected in series with the first positive terminal.
  • the control unit is configured to control the first switch unit and the second switch unit to be turned on or off based on the sampled current value of the current sampling unit.
  • the first switch unit includes a first switch, the first switch is connected in series between the first positive terminal and the positive electrode, and the second switch unit includes a second switch, so The second switch is connected in series between the second positive terminal and the positive terminal, the control unit includes a first controller, and the first controller is respectively connected to the first switch, the second switch, and The current sampling units are connected to form a first protection circuit, and the first protection circuit is used to control the first switch and the second switch to be turned on or off based on the sampled current value of the current sampling unit.
  • the first protection circuit further includes a first voltage sampling resistor and a second voltage sampling resistor, and the first controller is used to sample the first negative pole and the the first voltage value between the positive poles, and sample the second voltage value between the positive poles and the second negative poles through the second voltage sampling resistor to obtain the first voltage value and the second The first voltage mean of the voltage values.
  • the first controller is further configured to acquire the sampling current value of the current sampling unit, and when at least one of the sampling current value and the first average voltage exceeds a corresponding protection threshold , controlling the first switch and the second switch to be turned off.
  • the first switch unit includes a third switch, the third switch is connected in series between the first positive terminal and the positive terminal, the second switch unit includes a fourth switch, and the The fourth switch is connected in series between the second positive terminal and the positive terminal, the control unit includes a second controller, and the second controller is connected to the third switch, the fourth switch, and the The current sampling units are connected to form a second protection circuit, and the second protection circuit is used to control the third switch and the fourth switch to be turned on or off based on the sampled current value of the current sampling unit.
  • the second protection circuit further includes a third voltage sampling resistor and a fourth voltage sampling resistor, and the second controller is used to sample the first negative electrode and the The third voltage value between the positive electrodes, and the fourth voltage value between the positive electrode and the second negative electrode is sampled by sending a fourth voltage sampling resistor to obtain the third voltage value and the fourth voltage value of the second voltage mean.
  • the second controller is further configured to obtain the sampled current value of the current sampling unit, and configured to obtain a corresponding protection threshold when at least one of the sampled current value and the second average voltage value exceeds a corresponding protection threshold , controlling the third switch and the fourth switch to be turned off.
  • the first positive terminal and the first negative terminal form a first battery port.
  • the second positive terminal and the second negative terminal form a second battery port.
  • the current flowing through the first battery port and the second battery port has the same current value.
  • the current sampling unit includes a first current sampling resistor and a second current sampling resistor.
  • the first current sampling resistor and the second current sampling resistor are connected in parallel, they are connected in series between the first positive terminal and the positive terminal, and between the second positive terminal and the positive terminal in series. between the positive electrodes.
  • the second aspect of the present application provides a battery, the battery includes a cell and a first charging protection device, the first charging protection device includes a circuit board and a battery control circuit arranged on the circuit board, wherein the The battery control circuit is the battery control circuit described in the first aspect.
  • the battery further includes a first conductive sheet, a second conductive sheet, and a third conductive sheet;
  • the battery cell includes a metal case, a pole core assembly, a first cover plate, and a first rivet;
  • the metal shell is a steel shell shell, the metal shell has an internal cavity and is provided with a first opening, the pole core assembly is arranged in the metal shell, and the first cover plate covers the on the first opening, so as to accommodate the pole core assembly in the airtight space formed by the metal case and the first cover plate, the first rivet is arranged on the first cover plate and connected to the first cover plate Insulation is provided between the first cover plates.
  • the first charging protection device is arranged on the side of the battery core having the first rivet, and the first charging protection device has a first connection end connected to the battery core , the first connection end includes a positive pole, a first negative pole, and a second negative pole, the first negative pole is connected to the first cover plate through the first conductive sheet, and the second negative pole is connected to the first cover plate through the third
  • the conductive sheet is connected to the first cover plate, and the positive electrode is connected to the first rivet through the second conductive sheet.
  • a liquid injection hole is further provided on the first cover plate, wherein the liquid injection hole penetrates through the first cover plate.
  • the third aspect of the present application provides an electronic device, including the battery as described in the second aspect above and a body for accommodating the battery, the battery at least includes a first battery port and a second battery port, and the battery In the case of being fixed in the body, the first battery port and the second battery port are respectively used to electrically connect with corresponding ports in the body.
  • the first switch unit is connected between the positive pole and the first positive terminal; the positive pole, the first switch unit and the first positive terminal are connected, and the The first negative terminal is connected to the first negative terminal to form a first conductive path; the second switch unit is connected between the positive terminal and the second positive terminal; the positive terminal, the second switch unit connected to the second positive terminal, and connected to the second negative terminal to form a second conductive path. Therefore, both the first switch unit and the second switch unit are located at the positive pole to realize high-side drive, which can avoid the problem of short circuit caused by the non-insulated design of the existing low-side drive housing.
  • This application can effectively reduce the heat generation of the circuit board during high-power charging by constructing one positive, two negative three-pole lugs and a high-end drive circuit design, and can realize high-power fast charging.
  • the batteries and electronic devices of this application can realize high-end driving.
  • the control unit can control the turn-on or turn-off of the first switch unit and the second switch unit according to actual conditions, which can protect the battery cells.
  • FIG. 1 is a block diagram of a battery in the first embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of the battery in the first embodiment of the present application.
  • Fig. 3 is a front view of the battery cell in the first embodiment of the present application.
  • Fig. 4 is a top view of the battery cell in the first embodiment of the present application.
  • Fig. 5 is a front view of a first charging protection device in an embodiment of the present application.
  • FIG. 6 is a top view of a first charging protection device in an embodiment of the present application.
  • FIG. 7 is a schematic circuit diagram of a battery in an embodiment of the present application.
  • Fig. 8 is a front view of the battery cell in the second embodiment of the present application.
  • FIG. 9 is a top view of the battery cell in the second embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a battery in the second embodiment of the present application.
  • orientation or positional relationship indicated by the terms “length”, “width”, “upper”, “lower”, “front”, “rear”, etc.
  • the orientation or positional relationship is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the application .
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features.
  • “plurality” means two or more, unless otherwise specifically defined.
  • the first aspect of the present application provides a battery control circuit, including a first connection terminal, a second connection terminal, and a circuit protection module.
  • the first connection end is used to connect with the battery core, and the first connection end includes a positive pole, a first negative pole and a second negative pole.
  • the second connection end is used to connect with the device, and the second connection end includes a first positive end, a first negative end, a second positive end and a second negative end.
  • the circuit protection module includes a first switch unit, a second switch unit, and a control unit.
  • the first switch unit is connected between the positive terminal and the first positive terminal.
  • the positive pole, the first switch unit are connected to the first positive pole, and the first negative pole is connected to the first negative pole to form a first conductive path.
  • the second switch unit is connected between the positive terminal and the second positive terminal.
  • the positive pole, the second switch unit, and the second positive pole are connected, and the second negative pole is connected with the second negative pole to form a second conductive path.
  • the control unit is used for controlling the turn-on or turn-off of the first switch unit and controlling the turn-on or turn-off of the second switch unit.
  • the second aspect of the present application provides a battery, the battery includes a cell and a first charging protection device, the first charging protection device includes a circuit board and a battery control circuit arranged on the circuit board, wherein, The battery control circuit is the battery control circuit described in the first aspect above.
  • the third aspect of the present application provides an electronic device, including a battery and a body for accommodating the battery, the battery is the battery described in the second aspect above, and the battery includes at least a first battery port and a second battery port , when the battery is fixed in the body, the first battery port and the second battery port are respectively used to electrically connect with corresponding ports in the body.
  • the first switch unit is connected between the positive pole and the first positive terminal; the positive pole, the first switch unit and the first positive terminal are connected, and the The first negative terminal is connected to the first negative terminal to form a first conductive path; the second switch unit is connected between the positive terminal and the second positive terminal; the positive terminal, the second switch unit connected to the second positive terminal, and connected to the second negative terminal to form a second conductive path. Therefore, both the first switch unit and the second switch unit are located at the positive pole to realize high-side drive, which can avoid the problem of short circuit caused by the non-insulated design of the existing low-side drive shell.
  • This application can effectively reduce the heat generation of the circuit board during high-power charging by constructing one positive, two negative three-pole lugs and a high-end drive circuit design, and can realize high-power fast charging.
  • the batteries and electronic devices of this application can realize high-end driving.
  • the control unit can control the turn-on or turn-off of the first switch unit and the second switch unit according to actual conditions, which can protect the battery cells.
  • FIG. 1 is a block diagram of a battery in the first embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of the battery in the first embodiment of the present application.
  • the battery 1000 includes a cell 100 and a first charging protection device 200 .
  • the first charging protection device 200 is used to protect the battery cell 100 to achieve fast charging under safe conditions.
  • the battery 1000 further includes a first conductive sheet 300 , a second conductive sheet 400 and a third conductive sheet 500 . It can be understood that the battery 1000 also includes other components, which will not be described in detail here.
  • FIG. 3 is a front view of the battery cell 100 in an embodiment of the present application
  • FIG. 4 is a top view of the battery cell 100 in an embodiment of the present application.
  • the battery core 100 includes a metal case 11 , a pole core assembly (not shown in the figure), a first cover plate 12 and a first rivet 13 .
  • the metal shell 11 has an inner cavity (not shown in the figure) and a first opening (not shown in the figure) communicating with the inner cavity.
  • the pole core assembly is disposed in the inner cavity of the metal casing 11 .
  • the first cover plate 12 covers the first opening of the metal casing 11, so as to accommodate the pole core assembly in the airtight space formed by the metal casing 11 and the first cover plate 12, the first The rivet 13 is disposed on the first cover 12 , and the first rivet 13 is insulated from the first cover 12 .
  • the first cover 12 is also provided with a liquid injection hole 14 penetrating through the first cover 12 , and the liquid injection hole 14 is used for injecting electrolyte into the internal cavity of the battery cell 100 . Please refer to FIG. 1, FIG. 2, FIG. 3 and FIG.
  • the first charging protection device 200 is arranged on the side of the battery cell 100 with the first rivet 13, the first charging protection device 200 It has a first connection end 221, and the first connection end 221 is used to connect with the battery cell 100.
  • the first connection end 221 includes a positive pole 2212, a first negative pole 2211 and a second negative pole 2213; the first negative pole 2211 passes
  • the first conductive sheet 300 is connected to the first cover plate 12, the second negative electrode 2213 is connected to the first cover plate 12 through the third conductive sheet 500, and the positive electrode 2212 is connected to the second negative electrode 2213 through the second conductive sheet 500.
  • the conductive sheet 400 is connected to the first rivet 13 .
  • the battery 1000 is a steel shell battery.
  • the metal shell 11 is a steel shell shell. Therefore, the battery cell 100 is a battery cell of a steel case battery, and the first charging protection device 200 is a charging protection device of a steel case battery. It can be understood that, in other embodiments, the metal casing 11 may also be a casing made of other metal materials, and the first charging protection device 200 may be a charging protection device for other types of batteries.
  • the insulation between the first rivet 13 and the first cover plate 12 is achieved by setting a first insulator 131 , so that the first rivet 13 can be realized through the first insulator 131 . Insulation design between the first cover plate 12 and the first cover plate 12.
  • the first cover plate 12 may be welded to the first opening of the metal shell 11 by welding. It can be understood that, in other embodiments, the first cover plate 12 can also be disposed on the first opening of the metal casing 11 in other ways.
  • the position of the second conductive sheet 400 is fixed, that is, it is arranged on the first rivet 13, but the positions of the first conductive sheet 300 and the third conductive sheet 500 are It can be adjusted, that is, it can be set at any position of the first cover plate 12 except the position of the first rivet 13 , or it can also be set on the metal shell 11 .
  • the first charging protection device 200 includes a circuit board 21 and a battery control circuit 22 disposed on the circuit board 21 .
  • the battery control circuit 22 includes:
  • the first connection end 221 is used to connect with the cell 100, the first connection end 221 includes a positive pole 2212, a first negative pole 2211 and a second negative pole 2213;
  • the second connection end 222 is used to connect with the device, and the second connection end 222 includes a first positive end 2221, a first negative end 2222, a second positive end 2223 and a second negative end 2224; and
  • the first switch unit 2231, the first switch unit 2231 is connected between the positive pole 2212 and the first positive terminal 2221; the positive pole 2212, the first switch unit 2231 and the first positive terminal 2221 connected, and the first negative terminal 2222 is connected to the first negative terminal 2211 to form a first conductive path 2002;
  • the second switch unit 2232, the second switch unit 2232 is connected between the positive pole 2212 and the second positive terminal 2223; the positive pole 2212, the second switch unit 2232 and the second positive terminal 2223 connected, and the second negative terminal 2224 is connected to the second negative electrode 2213 to form a second conductive path 2003;
  • control unit 2233 the control unit 2233 is used to control the turn-on or turn-off of the first switch unit 2231 and control the turn-on or turn-off of the second switch unit 2232 .
  • the first switch unit 2231 is arranged between the positive pole 2212 and the first positive terminal 2221
  • the second switch unit 2232 is arranged between the positive pole 2212 and the second positive terminal 2223, that is, the first Both the switch unit 2231 and the second switch unit 2232 are located at the positive pole to realize high-side drive, which can avoid the short-circuit problem caused by the non-insulated design of the existing low-side drive shell.
  • the control unit 2233 can control the turn-on or turn-off of the first switch unit 2231 and the second switch unit 2232 according to the actual situation, which can protect the battery cell 100 .
  • the high-end drive of the battery 1000 can make good use of the negative polarity of the metal case 11 and the first cover plate 12, as well as the positive polarity of the first rivet 13 of the battery cell 100, so that one positive and two negative polarities can be constructed.
  • the fast charging and charging circuit driven by the positive electrode can effectively solve the problem of short circuit with the electronic device body caused by the non-insulated design of the metal shell 11 of the battery cell, and the non-insulated design can increase the battery capacity.
  • control unit 2233 has high-end drive capability, and the difference between the voltage output by the control unit 2233 and the voltage between the positive pole 2212 is greater than zero.
  • the difference between the voltage output by the control unit 2233 and the voltage of the anode 2212 is greater than or equal to 4V.
  • control unit 2233 can realize high-side driving.
  • the first charging protection device 200 can transmit current through the first conductive path 2002 and the second conductive path 2003 .
  • the first positive terminal 2221 and the first negative terminal 2222 form a first battery port 2225
  • the second positive terminal 2223 and the second negative terminal 2224 form a second battery port 2226 . It can be understood that the current flowing through the first battery port 2225 and the second battery port 2226 should be the same, which is beneficial to protect the overall balance of the temperature rise of the first charging protection device 200 .
  • the circuit board 21 is in the shape of a strip, including two opposite first sides 211 and two opposite second sides 212 .
  • the length of the first side 211 is greater than the length of the second side 212 .
  • the first side 211 is disposed along the width direction of the battery cell 100 .
  • the second side 212 is perpendicular to the first side 211 .
  • the first conductive sheet 300 , the second conductive sheet 400 and the third conductive sheet 500 are arranged at intervals along the first side 211 .
  • the first conductive sheet 300 , the second conductive sheet 400 and the third conductive sheet 500 are L-shaped.
  • the first end of the first conductive sheet 300, the second conductive sheet 400 and the third conductive sheet 500 are connected on the circuit board 21 through the surface mount technology SMT chip, and the second end of the first conductive sheet 300 and the third conductive sheet 500 The second end of the second conductive sheet 400 is electrically connected to the first rivet 13 .
  • the first conductive sheet 300 , the second conductive sheet 400 and the third conductive sheet 500 are nickel sheets, for example, can be realized by but not limited to nickel plating on copper.
  • the first conductive sheet 300 , the second conductive sheet 400 and the third conductive sheet 500 are L-shaped, and may also be in other shapes.
  • FIG. 7 is a schematic circuit diagram of the first charging protection device 200 in an embodiment of the present application.
  • the circuit protection module 223 further includes a current sampling unit 2234, the current sampling unit 2234 is connected in series between the first positive terminal 2221 and the positive terminal 2212, and the current sampling unit 2234 is also connected in series between the second positive terminal 2223 and the positive terminal 2212 , the control unit 2233 is configured to control the first switch unit 2231 and the second switch unit 2232 to be turned on or off based on the sampled current value of the current sampling unit 2234 .
  • the current sampling unit 2234 includes a first current sampling resistor R1 and a second current sampling resistor R2, the first current sampling resistor R1 and the second current sampling resistor R2 are connected in parallel , connected in series between the first positive terminal 2221 and the positive electrode 2212 , and connected in series between the second positive terminal 2223 and the positive electrode 2212 .
  • the present application can determine the magnitude of the passing current according to the voltage drop across the current sampling unit 2234, and then control the first switch unit 2231 and the second switch unit 2232 to be turned on or off according to the magnitude of the current.
  • the current sampling unit 2234 can be a plurality of current sampling resistors connected in parallel. In this way, heat generation can be reduced.
  • the circuit protection module 223 includes a first protection circuit for protecting the first conductive path 2002 and the second conductive path 2003 from charging and discharging in a normal state.
  • the first protection circuit is connected between the first negative pole 2211 , the positive pole 2212 and the first battery port 2225 , and is also connected between the second negative pole 2213 , the positive pole 2212 and the second battery port 2226 .
  • the first switch unit 2231 includes a first switch S2, the first switch S2 is connected in series between the first positive terminal 2221 and the positive terminal 2212, the second switch unit 2232 includes a second switch S3, the second switch S2 Two switches S3 are connected in series between the second positive terminal 2223 and the positive terminal 2212, the control unit 2233 includes a first controller U1, and the first controller U1 is connected to the first switch S2, the second switch S3 and the current sampling unit 2234 respectively to form a
  • the first protection circuit the first protection circuit is used to control the on or off of the first switch S2 and the second switch S3 based on the sampled current value of the current sampling unit 2234 to protect the cell 100 .
  • the first controller U1 is responsible for detecting the magnitude of the charging and discharging current of the battery cell 100, and when the charging and discharging current exceeds the protection threshold, the first controller U1 of the first protection circuit controls to turn off the first switch S2 and the second switch S2.
  • the switch S3 disconnects the conductive paths between the positive electrode 2212 and the first battery port 2225 , and between the positive electrode 2212 and the second battery port 2226 , thereby protecting the battery cell 100 .
  • the first controller U1 has a CO1 terminal and a DO1 terminal.
  • the first switch S2 includes a charging switch K3 and a discharging switch K4.
  • the second switch S3 includes a charging switch K1 and a discharging switch K2.
  • the CO1 terminal and DO1 terminal of the first controller U1 can output voltage relative to the positive pole 2212, and the voltage range can be 4-5V, 4-6V, or other voltages, that is, the voltage of the CO1 terminal and DO1 terminal of U1 is higher than that of the positive pole 2212 The voltage is higher than 4 ⁇ 5V, 4 ⁇ 6V, or other voltages.
  • the CO1 terminal of the first controller U1 can drive and open the charging switch K3 through the G3 terminal of the first switch S2, and open the charging switch K1 through the G1 terminal of the second switch S3, and the DO1 terminal of the first controller U1 can open the charging switch through the first switch S2
  • the G4 terminal of the second switch S3 drives to open the discharge switch K4, and the G2 terminal of the second switch S3 drives to open the discharge switch K2, so that a conductive path is formed between the L3 terminal and the L4 terminal of the first switch S2, and the L1 terminal and L2 terminal of the second switch S3 A conductive path is formed between them.
  • the first protection circuit further includes a first voltage sampling resistor RV1 and a second voltage sampling resistor RV2, and the first controller U1 is used to sample the first negative electrode 2211 through the first voltage sampling resistor RV1 and the first voltage value between the positive pole 2212, and sample the second voltage value between the positive pole 2212 and the second negative pole 2213 through the second voltage sampling resistor RV2 to obtain the first voltage value of the first voltage value and the second voltage value mean.
  • the first controller U1 also samples the sampled current value of the current sampling unit 2234 .
  • the first controller U1 is configured to control the first switch S2 and the second switch S3 to be turned off when at least one of the sampled current value and the first average voltage value exceeds a corresponding protection threshold.
  • the battery control circuit 22 further includes a filter capacitor C1.
  • the first controller U1, the first switch S2, the second switch S3, the first voltage sampling resistor RV1, the second voltage sampling resistor RV2, the first current sampling resistor R1, the second current sampling resistor R2 and the filter capacitor C1 together form the first a protection circuit.
  • the first controller U1 is a protection IC with high-end voltage driving capability.
  • the VD1 terminal of the first controller U1 provides it with a working power input, and at the same time, it is used as a current sampling signal line together with the CS1 terminal, which is connected between the first current sampling resistor R1 and The two ends of the second current sampling resistor R2 connected in parallel can judge whether the charging and discharging current exceeds the current protection threshold by reflecting the voltage drop on both ends of the first current sampling resistor R1 and the second current sampling resistor R2.
  • the VD1 terminal and the VS1 terminal of the first controller U1 are jointly used as the sampling signal line of the voltage of the battery cell 100, wherein the VS1 terminal is the zero potential point of the first controller U1, and the first voltage sampling resistor RV1 is connected to the first negative electrode 2211 and between the terminal VS1 of the first controller U1, for sampling the first voltage value between the positive pole 2212 and the first negative pole 2211.
  • the filter capacitor C1 is connected between the VD1 terminal and the VS1 terminal.
  • the second voltage sampling resistor RV2 is connected between the second negative pole 2213 and the VS1 terminal of the first controller U1, and is used to sample the second voltage value between the positive pole 2212 and the second negative pole 2213, and obtain the first voltage value and the second voltage value.
  • the first voltage average value of the two voltage values and when the first voltage average value exceeds the overvoltage protection threshold of the first controller U1, the high level of the CO1 terminal of the first controller U1 changes to a low level, and the control turns off the first The switch S2 and the second switch S3 cannot be charged to protect the battery cell 100 .
  • the average value of the first voltage is lower than the undervoltage protection threshold of the first controller U1, the high level of the CO1 terminal and DO1 terminal of the first controller U1 becomes low level, and the first switch S2 and the second switch are controlled to be turned off S3, discharge cannot be performed to protect the battery cell 100 .
  • the circuit protection module 223 includes a second protection circuit, and the second protection circuit is used to protect the first conductive path 2002 and the second conductive path 2003 from charging and discharging under normal conditions.
  • the second protection circuit is connected between the first negative pole 2211 , the positive pole 2212 and the first battery port 2225 , and is also connected between the positive pole 2212 , the second negative pole 2213 and the second battery port 2226 .
  • the first switch unit 2231 includes a third switch S1, and the third switch S1 is connected in series between the first positive terminal 2221 and the positive terminal 2212 .
  • the second switch unit 2232 includes a fourth switch S4, and the fourth switch S4 is connected in series between the second positive terminal 2223 and the positive terminal 2212.
  • the control unit 2233 includes a second controller U2, the second controller U2 is respectively connected with the third switch S1, the fourth switch S4 and the current sampling unit 2234 to form a second protection circuit, the second protection circuit is used for
  • the sampled current value controls the turn-on or turn-off of the third switch S1 and the fourth switch S4.
  • the second controller U2 controls to turn off the third switch S1 and the fourth switch S4 when the charging and discharging current of the battery cell 100 exceeds the protection threshold, thereby disconnecting the positive pole 2212 from the first battery port 2225 and the positive pole 2212 from the first battery port 2225.
  • the conductive path between the two battery ports 2226 serves to protect the battery cell 100 .
  • the first protection circuit and the second protection circuit are two mutually independent protection circuits, which are used to protect the battery cell 100 at the same time, and when one of the protection circuits fails, the other protects the battery cell 100 .
  • the first protection circuit should perform the protection action first, especially the voltage protection function.
  • the voltage protection includes overvoltage protection and undervoltage protection. Overvoltage protection The threshold is usually around 4.6V, and the undervoltage protection threshold is usually around 2.5V.
  • the third switch S1 includes a charging switch K5 and a discharging switch K6.
  • the fourth switch S4 includes a charge switch K7 and a discharge switch K8.
  • the second controller U2 has high-end drive capability, and the CO2 and DO2 terminals of the second controller U2 output voltage relative to the positive electrode 2212, wherein the voltage range is 4-5V, or 4-6V, or other voltages, that is, the second
  • the CO2 terminal of the controller U2 can drive and open the charging switch K5 through the G5 terminal of the third switch S1, drive and open the charging switch K7 through the G7 terminal of the fourth switch S4, and the DO2 terminal of the second controller U2 can open the charging switch K7 through the G6 terminal of the third switch S1 terminal drive to open the discharge switch K6, and to open the discharge switch K8 by driving the G8 terminal of the fourth switch S4, so that a conductive path is formed between the L5 terminal and the L6 terminal of the third switch S1, and the L7 terminal and the L8 terminal
  • the first switch S2, the second switch S3, the third switch S1 and the fourth switch S4 are voltage-driven MOS transistors, which are widely used in the battery control circuit 22, and their working The principle will not be described in detail here.
  • the first switch S2 and the second switch S3 are simultaneously turned on or off under the control of the first controller U1, and the third switch S1 and the fourth switch S4 are simultaneously turned on under the control of the second controller U2.
  • the first switch S2, the second switch S3, the third switch S1 and the fourth switch S4 should be of the same type and have symmetry on the same circuit board 21, such as the first switch S2, the second switch S3, the third switch
  • the switch S1 and the fourth switch S4 can be one switch each, or one or more switches can be connected in parallel and the number of switches connected in parallel should be the same.
  • the first switch S2, the second switch S3, the third switch S1 and the fourth switch S4 can be connected in parallel to reduce internal resistance and reduce heat generation. Take one switch in parallel as an example, there are 8 switches in total.
  • the switches connected in parallel are designed back to back in layout, so that the line impedance between parallel switches can be minimized.
  • the first battery port 2225 close to the positive pole 2212 (that is, the first rivet 13) is the first positive terminal 2221 of the first battery port 2225, and the first positive terminal 2221 of the first battery port 2225 is connected to the third switch S1 and the first switch. S2 is connected to the first current sampling resistor R1, the first negative terminal 2222 of the first battery port 2225 is away from the positive terminal 2212 .
  • the second battery port 2226 close to the positive pole 2212 is the second positive terminal 2223 of the second battery port 2226, and the second positive terminal 2223 of the second battery port 2226 is connected to the fourth switch S4 and the second switch S3, converging to the second current sampling resistor R2, away from the positive pole 2212 is the second negative terminal 2224 of the second battery port 2226 .
  • the first positive end 2221 of the first battery port 2225 to the first switch unit 2231 and the second positive end 2223 of the second battery port 2226 to the second switch unit 2232 are two-way shunt structures, and the first negative end of the first battery port 2225
  • the terminal 2222 and the second negative terminal 2224 of the second battery port 2226 are directly connected on the first cover 12 through the first negative 2211 and the second negative 2213, and the negative polarity of the first cover 12 is used to save both
  • the copper foil connection space on the circuit board 21 reduces the heat dissipation pressure of the circuit board 21.
  • the metal shell 11 is equivalent to a large heat sink, which can better guide the first negative electrode 2211 and the second negative electrode 2213.
  • the first switch S2, the second switch S3, the third switch S1 and the fourth switch S4, as well as the first current sampling resistor R1 and the second current sampling resistor R2 are all arranged at the positive terminal of the cell 100 to realize high-side driving, and , the first controller U1 and the second controller U2 have high-end driving capabilities, and their CO1, DO1, CO2, and DO2 terminals can output a higher voltage than the battery cell 100, such as twice the voltage of the battery cell 100 Or above, drive to open the gates of the first switch unit 2231 and the second switch unit 2232 .
  • the second protection circuit further includes a third voltage sampling resistor RV3 and a fourth voltage sampling resistor RV4, and the second controller U2 is used to sample the first negative pole 2211 through the third voltage sampling resistor RV3 and the third voltage value between the positive pole 2212, and sample the fourth voltage value between the positive pole 2212 and the second negative pole 2213 by sending the fourth voltage sampling resistor RV4 to obtain the second voltage value of the third voltage value and the fourth voltage value Voltage average value, the second controller U2 also samples the total current value of the current sampling unit 2234, and the second controller U2 is used to control the third switch when at least one of the sampled current value and the second voltage average value exceeds the corresponding protection threshold S1 and the fourth switch S4 are turned off.
  • the second controller U2 is used to sample the first negative pole 2211 through the third voltage sampling resistor RV3 and the third voltage value between the positive pole 2212, and sample the fourth voltage value between the positive pole 2212 and the second negative pole 2213 by sending the fourth voltage sampling resistor RV4 to obtain the second voltage value of the
  • the battery control circuit 22 further includes a second filter capacitor C2, a second controller U2, a third switch S1, a fourth switch S4, a third voltage sampling resistor RV3, a fourth voltage sampling The resistor RV4, the first current sampling resistor R1 and the second current sampling resistor R2 together form a second protection circuit.
  • the second controller U2 is a protection IC with high-end voltage driving capability.
  • the VD2 terminal of the second controller U2 provides it with a working power input, and at the same time, it works together with the CS2 terminal as a current sampling signal line, which is connected between the first current sampling resistor R1 and The two ends of the second current sampling resistor R2 connected in parallel can judge whether the charging and discharging current exceeds the current protection threshold by reflecting the voltage drop on both ends of the first current sampling resistor R1 and the second current sampling resistor R2.
  • the third voltage sampling resistor RV3 and the fourth voltage sampling resistor RV4 provide voltage sampling for the second controller U2, the VD2 terminal and VS2 terminal of the second controller U2 are used as the sampling signal line of the cell voltage, and the VS2 terminal is the second control
  • the third voltage sampling resistor RV3 is connected between the first negative electrode 2211 and the VS2 terminal of the second controller U2, and is used to sample the third voltage value between the positive electrode 2212 and the first negative electrode 2211
  • the first The four-voltage sampling resistor RV4 is connected between the second negative pole 2213 and the VS2 terminal of the second controller U2, and is used for sampling the fourth voltage value between the positive pole 2212 and the second negative pole 2213, and according to the third voltage value and the fourth The voltage value obtains the second voltage mean value.
  • the filter capacitor C2 is connected between the VD2 terminal and the VS2 terminal.
  • the overvoltage protection threshold of the second controller U2 When the average value of the second voltage exceeds the overvoltage protection threshold of the second controller U2, the high level of the CO2 terminal of the second controller U2 changes to a low level, and the third switch S1 and the fourth switch S4 are controlled to be turned off. Charge to protect the battery cell 100.
  • the control turns off the third switch S1 and the fourth switch S4, discharge cannot be performed to protect the battery cell 100 .
  • the battery control circuit 22 further includes a communication management circuit, and the communication management circuit includes a third controller U3, a current sampling unit 2234 and a fifth voltage sampling resistor RV5.
  • the third controller U3 is disposed adjacent to the first controller U1 or disposed adjacent to the second controller U2.
  • the third controller U3 may be integrated with the first controller U1, or integrated with the second controller U2.
  • the third controller U3 includes a temperature-sensing resistor NTC for sensing the temperature of the battery cell 100 for the electronic device system to decide on a charging strategy.
  • the fifth voltage sampling resistor RV5 is connected to the positive pole 2212 and the VD3 terminal of the third controller U3, and the VS3 terminal of the third controller U3 is connected to the first negative pole 2211 and the second negative pole 2213 for sampling between the first negative pole 2211 and the positive pole 2212
  • the fifth voltage value, the sixth voltage value between the positive electrode 2212 and the second negative electrode 2213, and a third average voltage value is obtained according to the fifth voltage value and the sixth voltage value.
  • the third controller U3, the fifth voltage sampling resistor RV5, the temperature sensing resistor NTC, the first current sampling resistor R1 and the second current sampling resistor R2 together form a communication management circuit.
  • the VD3 terminal of the third controller U3 is a voltage sampling terminal
  • the VD3 terminal is connected to the positive pole 2212
  • the VS3 terminal is the zero potential point of the third controller U3
  • VS3 is connected to the first negative pole 2211 and the second negative pole 2213
  • the SRN terminal and the SRP terminal is the current sampling signal line, respectively connected to the two ends of the parallel connection of the first current sampling resistor R1 and the second current sampling resistor R2
  • the SCL terminal is the clock signal line
  • the SDA terminal is the data signal line
  • the SCL terminal and the SDA terminal are common It constitutes the information interaction function between the communication management circuit and the electronic equipment.
  • the third controller U3 samples the voltage, current and temperature of the battery cell 100, and reports the values to the electronic equipment used to install the battery 1000, so that the electronic equipment can make corresponding decisions.
  • the first protection circuit, the second protection circuit and the communication management circuit share the first current sampling resistor R1 and the second current sampling resistor R2.
  • the first controller U1, the second controller U2 and the third controller U3 can judge the magnitude of the current in the charging and discharging circuit by detecting the voltage drop across the first current sampling resistor R1 and the second current sampling resistor R2 to execute Corresponding judgment and corresponding control.
  • FIG. 8 and FIG. 9 are schematic structural diagrams of the battery cell 100a in the second embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a battery in the second embodiment of the present application.
  • the metal shell 11 also has a second opening opposite to the first opening
  • the battery cell 100a also includes a second cover plate 15, which covers It is arranged on the second opening to form a closed cavity.
  • the second cover plate 15 can be, but not limited to, covered on the second opening by welding.
  • the second cover plate 15 is provided with a second rivet 16, the second rivet 16 passes through the second cover plate 15 and is connected to the positive electrode of the pole core assembly, the second rivet 16 is insulated from the second cover plate 15, and the pole core assembly The negative pole is connected to the second cover plate 15 .
  • the battery 1000a also includes a second charging protection device 600, and the second charging protection device 600 includes a second circuit board 61 and a battery control circuit. It can be understood that the control circuit is similar to the battery control circuit 22 in the first embodiment, and will not be described in detail here.
  • the battery 1000a further includes a fourth conductive sheet 700 , a fifth conductive sheet 800 and a sixth conductive sheet 900 , and the fourth conductive sheet 700 and the sixth conductive sheet 900 are located on both sides of the fifth conductive sheet 800 .
  • the second charging protection device 600 also includes a third battery port 650 and a fourth battery port 660, both of which can be used for charging and discharging.
  • two sets of upper and lower cover plates are arranged on the metal shell 11, that is, the first cover plate 12 and the second cover plate 15, the first cover plate 12 is provided with the first rivet 13, and the second cover plate A second rivet 16 is provided on the plate 15 . Therefore, the first battery port 2225, the second battery port 2226, the third battery port 650 and the fourth battery port 660 can be used for charging at the same time, so that the charging power can be doubled.
  • the single rivet design can realize 100W fast charging
  • the double rivet design can achieve 200W fast charging.
  • the third battery port 650 is disposed adjacent to the fourth conductive sheet 700
  • the fourth battery port 660 is disposed adjacent to the sixth conductive sheet 900 .
  • the second rivet 16 is insulated from the second cover plate 15 by a second insulating member.
  • the present application also provides an electronic device, including a battery and a body for accommodating the battery.
  • the battery is the above-mentioned battery 1000, and the battery 1000 includes a first battery port 2225 and a second battery port 2226.
  • the first battery port 2225 and the second battery port 2226 are respectively used to electrically connect with corresponding ports in the main body.
  • the above-mentioned battery 1000a includes a first battery port 2225, a second battery port 2226, a third battery port 650, and a fourth battery port 660, and the battery 1000a is fixed on the electronic device
  • the first battery port 2225 , the second battery port 2226 , the third battery port 650 and the fourth battery port 660 are respectively used to electrically connect with corresponding ports in the electronic device body.
  • charging efficiency can be further improved.
  • the present application has the above-mentioned excellent characteristics, so that it can improve the performance that is not available in the prior art in use and become practical, and become a product with great practical value.

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Abstract

一种电池控制电路、电池及电子设备。电池控制电路包括第一连接端、第二连接端、以及电路保护模组。该第一连接端包括正极、第一负极和第二负极。该第二连接端包括第一正极端、第一负极端、第二正极端、和第二负极端。该电路保护模组包括第一开关单元、第二开关单元、以及控制单元。该第一开关单元连接在正极和第一正极端之间。该第二开关单元连接在正极和第二正极端之间。该控制单元用于控制第一开关单元和第二开关单元的导通或关断。

Description

电池控制电路、电池及电子设备
本申请要求于2022年01月30日提交中国专利局、申请号为202220250819.3、申请名称为“一种电池控制电路、充电保护装置、电池及电子设备”的中国专利申请和于2022年05月10日提交中国专利局、申请号为202221113226.9、申请名称为“电池控制电路、充电保护装置、电池及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池领域，尤其涉及一种电池控制电路、电池及电子设备。
背景技术
随着电池快充技术的快速发展，高功率充电对电池的要求越来越高，在大电流充电时，电池的温升要求尽量低，这对充电保护装置的设计是极大的挑战。
现有快充设计利用三极耳电芯优势，可有效缩短大电流在充电保护装置上的充电路径，从而降低阻抗，减小热量产生。其中，具体实现方法是充电保护装置上有两个柔性电路板(FPC，flexible printed circuit)与手机***端连接，两个FPC的正极分别经最短路径连接到充电保护装置的正极镍片，两个FPC的负极分别连接一路开关MOS，再连接到充电保护装置的负极镍片，而形成充放电回路。
目前开发的电池，因电芯的金属壳体为负极极性，而电子设备机舱(即安装电池的区域)是与电子设备***的地连接，***的地具有负极极性，因此，电子设备机舱本身也具有负极极性，为了安全，金属壳体须采用全部绝缘方案，即，使得电芯的厚度增加，而这损失了电芯容量。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。
为解决上述技术问题，本申请的技术方案是：
本申请第一方面提供一种电池控制电路，包括第一连接端、第二连接端、以及电路保护模组。该第一连接端用于与电池的电芯连接，该第一连接端包括正极、第一负极和第二负极。该第二连接端用于与所述电池外部的设备连接，该第二连接端包括第一正极端、第一负极端、第二正极端和第二负极端。该电路保护模组包括第一开关单元、第二开关单元、以及控制单元。该第一开关单元连接在正极和第一正极端之间。正极、第一开关单元和第一正极端连接，该第一负极端和第一负极连接，形成第一导电通路。该第二开关单元连接在正极和第二正极端之间。正极、第二开关单元、和第二正极端连接，第二负极端和第二负极连接，形成第二导电通路。控制单元用于控制第一开关单元的导通或关断以及控制第二开关单元的导通或关断。
在一种实施方式中，所述控制单元输出的电压与所述正极之间的电压的差大于等于4V。
在一种实施方式中，所述电路保护模组还包括电流采样单元，所述电流采样单元串联在所述第一正极端与所述正极之间，所述电流采样单元还串联在所述第二正极端与所述正极之间，所述控制单元用于基于所述电流采样单元的采样电流值控制所述第一开关单元和所述第二开关单元的导通或关断。
在一种实施方式中，所述第一开关单元包括第一开关，所述第一开关串联在所述第一正 极端与所述正极之间，所述第二开关单元包括第二开关，所述第二开关串联在所述第二正极端和所述正极之间，所述控制单元包括第一控制器，所述第一控制器分别与所述第一开关、所述第二开关、和所述电流采样单元连接而形成第一保护电路，所述第一保护电路用于基于所述电流采样单元的采样电流值控制所述第一开关和所述第二开关的导通或关断。
在一种实施方式中，所述第一保护电路还包括第一电压采样电阻和第二电压采样电阻，所述第一控制器用于通过所述第一电压采样电阻采样所述第一负极和所述正极之间的第一电压值，并通过所述第二电压采样电阻采样所述正极和所述第二负极之间的第二电压值，以得到所述第一电压值和所述第二电压值的第一电压均值。
在一种实施方式中，所述第一控制器还用于获取所述电流采样单元的采样电流值，并且在所述采样电流值、所述第一电压均值的其中至少一个超过相应的保护阈值时，控制所述第一开关和所述第二开关关断。
在一种实施方式中，所述第一开关单元包括第三开关，所述第三开关串联在所述第一正极端与所述正极之间，所述第二开关单元包括第四开关，所述第四开关串联在所述第二正极端和所述正极之间，所述控制单元包括第二控制器，所述第二控制器分别与所述第三开关、所述第四开关、和所述电流采样单元连接而形成第二保护电路，所述第二保护电路用于基于所述电流采样单元的采样电流值控制所述第三开关和所述第四开关的导通或关断。
在一种实施方式中，所述第二保护电路还包括第三电压采样电阻和第四电压采样电阻，所述第二控制器用于通过所述第三电压采样电阻采样所述第一负极和所述正极之间的第三电压值，并通过输送第四电压采样电阻采样所述正极和所述第二负极之间的第四电压值，以得到所述第三电压值和所述第四电压值的第二电压均值。
在一种实施方式中，所述第二控制器还用于获取所述电流采样单元的采样电流值，并且用于在所述采样电流值、第二电压均值的其中至少一个超过相应的保护阈值时，控制所述第三开关和所述第四开关关断。
在一种实施方式中，所述第一正极端和所述第一负极端构成第一电池端口。
在一种实施方式中，所述第二正极端和所述第二负极端构成第二电池端口。
在一种实施方式中，流经所述第一电池端口和所述第二电池端口的电流具有相同的电流值。
在一种实施方式中，所述电流采样单元包括第一电流采样电阻和第二电流采样电阻。在一种实施方式中，所述第一电流采样电阻和所述第二电流采样电阻并联后，串联在所述第一正极端与所述正极之间，以及串联在所述第二正极端与所述正极之间。
本申请第二方面提供了一种电池，所述电池包括电芯和第一充电保护装置，所述第一充电保护装置包括电路板以及设置在所述电路板上的电池控制电路，其中，所述电池控制电路为上述第一方面所述的电池控制电路。
在一种实施方式中，所述电池还包括第一导电片、第二导电片、和第三导电片；所述电芯包括金属壳体、极芯组件、第一盖板、第一铆钉；所述金属壳体为钢壳壳体，所述金属壳体具有内部空腔且设置有第一开口，所述极芯组件设置在所述金属壳体内，所述第一盖板盖在所述第一开口上，以将所述极芯组件收容在所述金属壳体与所述第一盖板形成的密闭空间内，所述第一铆钉设置在所述第一盖板上并与所述第一盖板之间绝缘设置。
在一种实施方式中，所述第一充电保护装置设置在所述电芯具有所述第一铆钉的一侧上，所述第一充电保护装置具有与所述电芯连接的第一连接端，所述第一连接端包括正极、第一负极、和第二负极，所述第一负极通过所述第一导电片与所述第一盖板连接，所述第二负极 通过所述第三导电片与所述第一盖板连接，所述正极通过所述第二导电片与所述第一铆钉连接。
在一种实施方式中，所述第一盖板上还设置有注液孔，其中，所述注液孔贯穿所述第一盖板。本申请第三方面提供一种电子设备，包括如上述第二方面所述的电池和用于容纳所述电池的本体，所述电池至少包括第一电池端口和第二电池端口，在所述电池固定在所述本体内的情况下，所述第一电池端口和第二电池端口用于分别与本体内的对应端口电性连接。
与现有技术相比，本申请的有益效果在于：
本申请的电池控制电路，所述第一开关单元连接在所述正极和所述第一正极端之间；所述正极、所述第一开关单元和所述第一正极端连接，以及，所述第一负极端和所述第一负极连接，形成第一导电通路；所述第二开关单元连接在所述正极和所述第二正极端之间；所述正极、所述第二开关单元和所述第二正极端连接，以及，所述第二负极端和所述第二负极连接形成第二导电通路。因此，第一开关单元和第二开关单元均位于正极，实现高端驱动，可避免现有低端驱动壳体非绝缘设计所带来的短路的问题。本申请通过构造一正两负三极耳搭配高端驱动电路设计，可以有效减少电路板在大功率充电时的热量产生，可实现大功率快速充电。本申请的电池和电子设备，可以实现高端驱动。而且，控制单元能够根据实际情况控制第一开关单元和第二开关单元的导通或关断，可以对电芯起到保护作用。
附图说明
图1为本申请第一实施例中的电池的模块示意图。
图2为本申请第一实施例中的电池的结构示意图。
图3为本申请第一实施例中的电芯的主视图。
图4为本申请第一实施例中的电芯的俯视图。
图5为本申请一实施例中的第一充电保护装置的主视图。
图6为本申请一实施例中的第一充电保护装置的俯视图。
图7为本申请一实施例中的电池的电路示意图。
图8为本申请第二实施例中的电芯的主视图。
图9为本申请第二实施例中的电芯的俯视图。
图10为本申请第二实施例中的电池的结构示意图。
具体实施方式
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，旨在用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“长度”、“宽度”、“上”、“下”、“前”、“后”、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。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”等术语应做 广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；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或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请第一方面提供一种电池控制电路，包括第一连接端、第二连接端、以及电路保护模组。该第一连接端用于与电芯连接，该第一连接端包括正极、第一负极和第二负极。该第二连接端用于与设备连接，该第二连接端包括第一正极端、第一负极端、第二正极端和第二负极端。该电路保护模组包括第一开关单元、第二开关单元、以及控制单元。该第一开关单元连接在正极和第一正极端之间。正极、第一开关单元和第一正极端连接，该第一负极端和第一负极连接，形成第一导电通路。该第二开关单元连接在正极和第二正极端之间。正极、第二开关单元、和第二正极端连接，第二负极端和第二负极连接形成第二导电通路。控制单元用于控制第一开关单元的导通或关断以及控制第二开关单元的导通或关断。
本申请第二方面提供了一种电池，所述电池包括电芯和第一充电保护装置，所述第一充电保护装置为包括电路板以及设置在所述电路板上的电池控制电路，其中，所述电池控制电路为上述第一方面所述的电池控制电路。
本申请第三方面提供一种电子设备，包括电池和用于容纳所述电池的本体，所述电池为上述第二方面所述的电池，所述电池至少包括第一电池端口和第二电池端口，在所述电池固定在所述本体内的情况下，所述第一电池端口和第二电池端口用于分别与本体内的对应端口电性连接。
与现有技术相比，本申请的有益效果在于：
本申请的电池控制电路，所述第一开关单元连接在所述正极和所述第一正极端之间；所述正极、所述第一开关单元和所述第一正极端连接，以及，所述第一负极端和所述第一负极连接，形成第一导电通路；所述第二开关单元连接在所述正极和所述第二正极端之间；所述正极、所述第二开关单元和所述第二正极端连接，以及，所述第二负极端和所述第二负极连接形成第二导电通路。因此，第一开关单元和第二开关单元均位于正极，实现高端驱动，可避免现有低端驱动壳体非绝缘设计所带来的短路的问题。本申请通过构造一正两负三极耳搭配高端驱动电路设计，可以有效减少电路板在大功率充电时的热量产生，可实现大功率快速充电。本申请的电池和电子设备，可以实现高端驱动。而且，控制单元能够根据实际情况控制第一开关单元和第二开关单元的导通或关断，可以对电芯起到保护作用。
请参考图1和图2，图1为本申请第一实施例中的电池的模块示意图。图2为本申请第一实施例中的电池的结构示意图。所述电池1000包括电芯100和第一充电保护装置200。所述第一充电保护装置200用于保护所述电芯100在安全的情况下实现快充。其中，所述电池1000还包括第一导电片300、第二导电片400和第三导电片500。可以理解的是，所述电池1000还包括其它组件，在此不做详细描述。
请参考图3和图4，图3为本申请一实施例中的电芯100的主视图；图4为本申请一实施例中的电芯100的俯视图。所述电芯100包括金属壳体11、极芯组件(图未示出)、第一盖板12和第一铆钉13。所述金属壳体11具有内部空腔(图未示出)和与内部空腔相通的第一开口(图未示出)。极芯组件设置在金属壳体11的内部空腔中。第一盖板12盖在金属壳体11的第一开口上，以将所述极芯组件收容在所述金属壳体11与所述第一盖板12形成的密闭空间内，所述第一铆钉13设置在所述第一盖板12上，并且，第一铆钉13与第一盖板12之间绝缘。第一盖板12上还设置有贯穿第一盖板12的注液孔14，所述注液孔14用于向电芯100的内部空腔注射电解液。请 再次参考图1、图2、图3和图4，所述第一充电保护装置200设置在所述电芯100具有所述第一铆钉13的一侧上，所述第一充电保护装置200具有第一连接端221，所述第一连接端221用于与电芯100连接，所述第一连接端221包括正极2212、第一负极2211和第二负极2213；所述第一负极2211通过所述第一导电片300与所述第一盖板12连接，所述第二负极2213通过所述第三导电片500与所述第一盖板12连接，所述正极2212通过所述第二导电片400与所述第一铆钉13连接。
在其中一实施例中，所述电池1000为钢壳电池。所述金属壳体11为钢壳壳体。因此，所述电芯100为钢壳电池的电芯，所述第一充电保护装置200为钢壳电池的充电保护装置。可以理解的是，在其它实施例中，所述金属壳体11还可以为其它金属材质的壳体，所述第一充电保护装置200可以为其它类型的电池的充电保护装置。
在其中一实施例中，所述第一铆钉13与所述第一盖板12之间通过设置第一绝缘件131而实现绝缘，以通过所述第一绝缘件131实现所述第一铆钉13与所述第一盖板12之间的绝缘设计。
在其中一实施例中，所述第一盖板12可以通过焊接的方式焊接在所述金属壳体11的第一开口上。可以理解的是，在其它实施例中，所述第一盖板12还可以通过其它的方式设置在所述金属壳体11的第一开口上。
在其中一实施例中，所述第二导电片400的位置是固定的，即，设置在所述第一铆钉13上，但是，所述第一导电片300和第三导电片500的位置是可以调节的，即，可以设置在第一盖板12的除第一铆钉13的位置的任意位置，或者，还可以设置在金属壳体11上。
请一并参考图5和图6，所述第一充电保护装置200包括电路板21以及设置在所述电路板21上的电池控制电路22。
请一并参考图1和图2，所述电池控制电路22包括：
所述第一连接端221，用于与电芯100连接，所述第一连接端221包括正极2212、第一负极2211和第二负极2213；
第二连接端222，用于与设备连接，所述第二连接端222包括第一正极端2221、第一负极端2222、第二正极端2223和第二负极端2224；以及
电路保护模组223，包括：
第一开关单元2231，所述第一开关单元2231连接在所述正极2212和所述第一正极端2221之间；所述正极2212、所述第一开关单元2231和所述第一正极端2221连接，以及，所述第一负极端2222和所述第一负极2211连接，形成第一导电通路2002；
第二开关单元2232，所述第二开关单元2232连接在所述正极2212和所述第二正极端2223之间；所述正极2212、所述第二开关单元2232和所述第二正极端2223连接，以及，所述第二负极端2224和所述第二负极2213连接形成第二导电通路2003；以及
控制单元2233，所述控制单元2233用于控制所述第一开关单元2231的导通或关断以及控制所述第二开关单元2232的导通或关断。
从而，本申请的电池控制电路22，第一开关单元2231设置在正极2212和第一正极端2221之间，第二开关单元2232设置在正极2212与第二正极端2223之间，即，第一开关单元2231和第二开关单元2232均位于正极，实现高端驱动，可避免现有低端驱动壳体非绝缘设计所带来的短路的问题。而且，控制单元2233能够根据实际情况控制第一开关单元2231和第二开关单元2232的导通或关断，可以对电芯100起到保护作用。
另外，电池1000的高端驱动可以很好的利用金属壳体11和第一盖板12的负极极性，以及电芯100的第一铆钉13的正极极性的特征，即可构造一正两负的正极驱动的快充充电电路，可 以有效解决电芯金属壳体11非绝缘设计带来的与电子设备本体短路问题，且非绝缘设计可以提高电池容量。
进一步地，在其中一实施例中，所述控制单元2233具有高端驱动能力，所述控制单元2233输出的电压与正极2212之间的电压之间的差大于零。
进一步地，在其中一实施例中，所述控制单元2233输出的电压与所述正极2212之间的电压的差大于等于4V。
从而，所述控制单元2233可以实现高端驱动。
进一步地，在其中一实施例中，所述第一充电保护装置200可以通过第一导电通路2002和第二导电通路2003来传输电流。所述第一正极端2221和所述第一负极端2222形成第一电池端口2225，所述第二正极端2223和所述第二负极端2224形成第二电池端口2226。可以理解的是，流过所述第一电池端口2225和所述第二电池端口2226的电流应相同，这样有利于保护第一充电保护装置200温升的整体均衡。
进一步地，在其中一实施例中，请再次参考图2，所述电路板21呈长条状，包括两个相对设置的第一边211和两个相对设置的第二边212。其中，所述第一边211的长度大于所述第二边212的长度。所述第一边211沿着所述电芯100的宽度方向设置。所述第二边212与第一边211垂直设置。所述第一导电片300、第二导电片400和第三导电片500沿第一边211间隔设置。请同时参考图5和图6，第一导电片300、第二导电片400和第三导电片500呈L形。第一导电片300、第二导电片400和第三导电片500的第一端通过表面贴片技术SMT贴片连接在电路板21上，第一导电片300和第三导电片500的第二端导电连接在第一盖板12上，第二导电片400的第二端导电连接在第一铆钉13上。
可选择地，在其中一实施例中，第一导电片300、第二导电片400和第三导电片500为镍片，例如，可以通过但不限于铜镀镍实现。
可选择地，在其中一实施例中，第一导电片300、第二导电片400和第三导电片500呈L形，也可以为其它形状。
请一并参考图7，图7为本申请一实施例中的第一充电保护装置200的电路示意图。电路保护模组223还包括电流采样单元2234，所述电流采样单元2234串联在第一正极端2221与正极2212之间，所述电流采样单元2234还串联在第二正极端2223与正极2212之间，所述控制单元2233用于基于电流采样单元2234的采样电流值控制第一开关单元2231和第二开关单元2232的导通或关断。
进一步地，在其中一实施例中，所述电流采样单元2234包括第一电流采样电阻R1和第二电流采样电阻R2，所述第一电流采样电阻R1和所述第二电流采样电阻R2并联后，串联在所述第一正极端2221与所述正极2212之间，以及串联在所述第二正极端2223与正极2212之间。
从而，本申请可以根据电流采样单元2234两端的压降判断通过的电流大小，进而根据电流的大小控制第一开关单元2231和第二开关单元2232的导通或关断。
可以理解的是，电流采样单元2234可以为多颗电流采样电阻并联。这样，可以降低发热。
可选择地，在其中一实施例中，所述电路保护模组223包括第一保护电路，第一保护电路用于保护第一导电通路2002和第二导电通路2003在正常的状态下充放电。第一保护电路连接在第一负极2211、正极2212与第一电池端口2225之间，同时也连接在第二负极2213、正极2212与第二电池端口2226之间。具体地，在其中一实施例中，第一开关单元2231包括第一开关S2，第一开关S2串联在第一正极端2221与正极2212之间，第二开关单元2232包括第二开关S3，第二开关S3串联在第二正极端2223和正极2212之间，控制单元2233包括第一控制器U1，第一控 制器U1分别与第一开关S2、第二开关S3和电流采样单元2234连接而形成第一保护电路，第一保护电路用于基于电流采样单元2234的采样电流值控制第一开关S2和第二开关S3的导通或关断，起到保护电芯100的作用。具体地，第一控制器U1负责检测电芯100的充放电电流的大小，并当充放电电流超过保护阈值时，第一保护电路的第一控制器U1控制关断第一开关S2和第二开关S3，从而断开正极2212与第一电池端口2225、正极2212与第二电池端口2226之间的导电通路，起到保护电芯100的作用。
进一步，在其中一实施例中，第一控制器U1具有CO1端和DO1端。第一开关S2包括充电开关K3和放电开关K4。第二开关S3包括充电开关K1和放电开关K2。第一控制器U1的CO1端和DO1端相对正极2212能输出电压，该电压的范围可以是4～5V，4～6V，或其它电压，即，U1的CO1端和DO1端的电压比正极2212的电压高出4～5V，4～6V，或其它电压。第一控制器U1的CO1端可以通过第一开关S2的G3端驱动打开充电开关K3，通过第二开关S3的G1端驱动打开充电开关K1，第一控制器U1的DO1端通过第一开关S2的G4端驱动打开放电开关K4，通过第二开关S3的G2端驱动打开放电开关K2，使第一开关S2的L3端和L4端之间形成导电通路，第二开关S3的L1端和L2端之间形成导电通路。
可选择地，在其中一实施例中，第一保护电路还包括第一电压采样电阻RV1和第二电压采样电阻RV2，第一控制器U1用于通过第一电压采样电阻RV1采样第一负极2211和正极2212之间的第一电压值，并通过第二电压采样电阻RV2采样正极2212和第二负极2213之间的第二电压值，以得到第一电压值和第二电压值的第一电压均值。第一控制器U1还采样电流采样单元2234的采样电流值。第一控制器U1用于在采样电流值、第一电压均值的其中至少一个超过相应的保护阈值时，控制第一开关S2和第二开关S3关断。
可选择地，在其中一实施例中，所述电池控制电路22还包括滤波电容C1。第一控制器U1、第一开关S2、第二开关S3、第一电压采样电阻RV1、第二电压采样电阻RV2、第一电流采样电阻R1、第二电流采样电阻R2和滤波电容C1共同组成第一保护电路。第一控制器U1为具有高端电压驱动能力的保护IC，第一控制器U1的VD1端为其提供工作电源输入，同时与CS1端共同作为电流采样信号线，连接在第一电流采样电阻R1和第二电流采样电阻R2并联后的两端，通过反映在第一电流采样电阻R1和第二电流采样电阻R2的两端上的压降大小来判断充放电电流是否超过电流保护的阈值。第一控制器U1的VD1端和VS1端共同作为电芯100的电压的采样信号线，其中，VS1端是第一控制器U1的零电位点，第一电压采样电阻RV1连接于第一负极2211和第一控制器U1的VS1端之间，用于采样正极2212和第一负极2211之间的第一电压值。滤波电容C1连接在VD1端和VS1端之间。第二电压采样电阻RV2连接于第二负极2213和第一控制器U1的VS1端之间，用于采样正极2212和第二负极2213之间的第二电压值，并得到第一电压值和第二电压值的第一电压均值，且当第一电压均值超过第一控制器U1的过压保护阈值，则第一控制器U1的CO1端的高电平变为低电平，控制关断第一开关S2和第二开关S3，不能进行充电，来保护电芯100。当第一电压均值低于第一控制器U1的欠压保护阈值，则第一控制器U1的CO1端和DO1端的高电平变为低电平，控制关断第一开关S2和第二开关S3，不能进行放电，来保护电芯100。
可选择地，在其中一实施例中，电路保护模组223包括第二保护电路，第二保护电路用于保护第一导电通路2002和第二导电通路2003在正常的情况下充放电。具体地，第二保护电路连接在第一负极2211、正极2212与第一电池端口2225之间，同时也连接在正极2212、第二负极2213与第二电池端口2226之间。具体地，在其中一实施例中，第一开关单元2231包括第三开关S1，第三开关S1串联在第一正极端2221与正极2212之间。第二开关单元2232包括第四开 关S4，第四开关S4串联在第二正极端2223和正极2212之间。控制单元2233包括第二控制器U2，第二控制器U2分别与第三开关S1、第四开关S4和电流采样单元2234连接而形成第二保护电路，第二保护电路用于基于电流采样单元2234的采样电流值控制第三开关S1和第四开关S4的导通或关断。具体地，第二控制器U2在电芯100的充放电电流超过保护阈值时，控制关断第三开关S1和第四开关S4，从而断开正极2212与第一电池端口2225、正极2212与第二电池端口2226之间的导电通路，起到保护电芯100的作用。
可以理解的是，第一保护电路和第二保护电路是两重相互独立的保护电路，同时用于保护电芯100，当其中一个保护失效时，由另一个保护电芯100。在第一保护电路和第二保护电路都正常工作的情况下，逻辑上应由第一保护电路先执行保护动作，尤其是电压保护功能，电压保护有过压保护和欠压保护，过压保护阈值通常在4.6V左右，欠压保护阈值通常在2.5V左右。
具体地，在其中一实施例中，第三开关S1包括充电开关K5和放电开关K6。第四开关S4包括充电开关K7和放电开关K8。第二控制器U2具有高端驱动能力，第二控制器U2的CO2端、DO2端相对正极2212输出电压，其中电压的范围为4～5V，也可以是4～6V，或其它电压，即第二控制器U2的CO2端可以通过第三开关S1的G5端驱动打开充电开关K5，通过第四开关S4的G7端驱动打开充电开关K7，第二控制器U2的DO2端通过第三开关S1的G6端驱动打开放电开关K6，通过第四开关S4的G8端驱动打开放电开关K8，使第三开关S1的L5端和L6端之间形成导电通路、并使第四开关S4单元的L7端和L8端之间形成导电通路。当第一开关S2、第二开关S3、第三开关S1和第四开关S4全部导通后，第一电池端口2225和第二电池端口2226到电芯100的充放电回路完全导通，可以进行充电或放电行为。
可以理解的是，在其中一实施例中，第一开关S2、第二开关S3、第三开关S1和第四开关S4为电压驱动型MOS管，在电池控制电路22上应用非常广泛，其工作原理在此不再详细描述，第一开关S2、第二开关S3受第一控制器U1控制同时导通或关断，第三开关S1和第四开关S4受第二控制器U2控制同时导通或关断，第一开关S2、第二开关S3、第三开关S1和第四开关S4在同一电路板21上应相同型号且具有对称性，如第一开关S2、第二开关S3、第三开关S1和第四开关S4可以各为1颗，也可以分别各再并联一颗甚至多颗且并联的颗数要相同，第一开关S2、第二开关S3、第三开关S1和第四开关S4各自可以并联以减小内阻，降低发热，以分别各并联1颗为例，共有8颗开关，相互并联的开关在布局上采用背靠背设计，这样可以实现并联开关之间线路阻抗最小。
从而，第一电池端口2225靠近正极2212(即第一铆钉13)为第一电池端口2225的第一正极端2221，第一电池端口2225的第一正极端2221连接第三开关S1和第一开关S2，汇合到第一电流采样电阻R1，远离正极2212为第一电池端口2225的第一负极端2222。第二电池端口2226靠近正极2212为第二电池端口2226的第二正极端2223，第二电池端口2226的第二正极端2223连接第四开关S4和第二开关S3，汇合到第二电流采样电阻R2，远离正极2212为第二电池端口2226的第二负极端2224。第一电池端口2225的第一正极端2221到第一开关单元2231和第二电池端口2226的第二正极端2223到第二开关单元2232为双路分流结构，第一电池端口2225的第一负极端2222和第二电池端口2226的第二负极端2224通过第一负极2211和第二负极2213在第一盖板12上直接相连，利用第一盖板12的负极极性，节省了两者在电路板21上走铜箔连接的空间，减小了电路板21的散热压力，同时金属壳体11等效为一个大的散热片，可以更好的把第一负极2211和第二负极2213导流通路上产生的热量快速散掉。另外，第一开关S2、第二开关S3、第三开关S1和第四开关S4以及第一电流采样电阻R1和第二电流采样电阻R2均设置在电 芯100的正极端，实现高端驱动，而且，第一控制器U1和第二控制器U2具有高端驱动能力，其CO1端、DO1端、CO2端、DO2端能够输出相对电芯100更高的电压，如为电芯100的电压的1倍或者以上，驱动打开第一开关单元2231和第二开关单元2232的门极。
可选择地，在其中一实施例中，第二保护电路还包括第三电压采样电阻RV3和第四电压采样电阻RV4，第二控制器U2用于通过第三电压采样电阻RV3采样第一负极2211和正极2212之间的第三电压值，并通过输送第四电压采样电阻RV4采样正极2212和第二负极2213之间的第四电压值，以得到第三电压值和第四电压值的第二电压均值，第二控制器U2还采样电流采样单元2234的总电流值，第二控制器U2用于在采样电流值、第二电压均值的其中至少一个超过相应的保护阈值时，控制第三开关S1和第四开关S4关断。
可选择地，在其中一实施例中，电池控制电路22还包括第二滤波电容C2，第二控制器U2、第三开关S1、第四开关S4、第三电压采样电阻RV3、第四电压采样电阻RV4、第一电流采样电阻R1和第二电流采样电阻R2共同组成第二保护电路。第二控制器U2为具有高端电压驱动能力的保护IC，第二控制器U2的VD2端为其提供工作电源输入，同时与CS2端共同作为电流采样信号线，连接在第一电流采样电阻R1和第二电流采样电阻R2并联后的两端，通过反映在第一电流采样电阻R1和第二电流采样电阻R2的两端上的压降大小来判断充放电电流是否超过电流保护的阈值。第三电压采样电阻RV3和第四电压采样电阻RV4为第二控制器U2提供电压采样，第二控制器U2的VD2端和VS2端共同作为电芯电压的采样信号线，VS2端是第二控制器U2的零电位点，第三电压采样电阻RV3连接于第一负极2211和第二控制器U2的VS2端之间，用于采样正极2212和第一负极2211之间的第三电压值，第四电压采样电阻RV4连接于第二负极2213和第二控制器U2的VS2端之间，用于采样正极2212和第二负极2213之间的第四电压值，并根据第三电压值和第四电压值得到第二电压均值。其中，滤波电容C2连接在VD2端和VS2端之间。当第二电压均值超过第二控制器U2的过压保护阈值，则第二控制器U2的CO2端高电平变为低电平，控制关断第三开关S1和第四开关S4，不能进行充电，来保护电芯100。当第二电压均值低于第二控制器U2的欠压保护阈值，则第二控制器U2的CO2端和DO2端的高电平变为低电平，控制关断第三开关S1和第四开关S4，不能进行放电，来保护电芯100。
可选择地，在其中一实施例中，电池控制电路22还包括通讯管理电路，通讯管理电路包括第三控制器U3、电流采样单元2234和第五电压采样电阻RV5。第三控制器U3邻近第一控制器U1设置或者邻近第二控制器U2设置。可选择地，在其中一实施例中，第三控制器U3可以与第一控制器U1集成设置，或者，与第二控制器U2集成设置。第三控制器U3包括感温电阻NTC，感温电阻NTC用于感测电芯100的温度，用于供电子设备***决策充电策略。第五电压采样电阻RV5连接正极2212和第三控制器U3的VD3端，第三控制器U3的VS3端连接第一负极2211和第二负极2213，用于采样第一负极2211和正极2212之间的第五电压值、正极2212和第二负极2213之间的第六电压值，并根据第五电压值和第六电压值得到第三电压均值。第三控制器U3、第五电压采样电阻RV5、感温电阻NTC、第一电流采样电阻R1和第二电流采样电阻R2共同组成通讯管理电路。其中，第三控制器U3的VD3端为电压采样端，VD3端连接正极2212，VS3端是第三控制器U3的零电位点，VS3连接第一负极2211和第二负极2213，SRN端和SRP端为电流采样信号线，分别连接在第一电流采样电阻R1和第二电流采样电阻R2并联后的两端上，SCL端为时钟信号线，SDA端为数据信号线，SCL端和SDA端共同构成通讯管理电路与电子设备之间的信息交互功能。第三控制器U3采样电芯100电压、电流和温度值，并上报至用于安装电池1000的电子设备上，以供电子设备作出相应的决策。
如上，第一保护电路、第二保护电路和通讯管理电路共用第一电流采样电阻R1和第二电 流采样电阻R2。第一控制器U1、第二控制器U2和第三控制器U3可以通过侦测第一电流采样电阻R1和第二电流采样电阻R2两端的压降判断充电和放电回路中电流的大小，来执行相应的判断和对应的控制。
可选择地，在其中一实施例中，请参考图8至图10，图8和图9为本申请第二实施例中的电芯100a的结构示意图。图10为本申请第二实施例中的电池的结构示意图。与第一实施例中不同的是，第二实施例中，金属壳体11还具有与第一开口相对设置的第二开口，电芯100a还包括第二盖板15，第二盖板15盖设在第二开口上以形成封闭的腔体，可以理解的是，第二盖板15可以是但不限于通过焊接的方式盖设在第二开口上。第二盖板15上设置有第二铆钉16，第二铆钉16穿过第二盖板15与极芯组件的正极连接，第二铆钉16与第二盖板15之间绝缘，极芯组件的负极与第二盖板15连接。电池1000a还包括第二充电保护装置600，第二充电保护装置600包括第二电路板61和电池控制电路。可以理解的是，该控制电路与第一实施例中的电池控制电路22类似，此处不再详述。所述电池1000a还包括第四导电片700、第五导电片800和第六导电片900，第四导电片700和第六导电片900位于第五导电片800两侧。第二充电保护装置600还包括第三电池端口650和第四电池端口660，第三电池端口650和第四电池端口660均可用于充放电。
从而，本实施例中，金属壳体11上设置有上下两套盖板，即，第一盖板12和第二盖板15，第一盖板12上设置有第一铆钉13，第二盖板15上设置有第二铆钉16。从而，可以同时利用第一电池端口2225、第二电池端口2226、第三电池端口650和第四电池端口660进行充电，从而可以翻倍提升充电功率，如采用单铆钉设计可以实现100W快充，则双铆钉设计可以实现200W快充。
可选择地，在其中一实施例中，第三电池端口650邻近第四导电片700设置，第四电池端口660邻近第六导电片900设置。
进一步地，在其中一实施例中，第二铆钉16与第二盖板15之间通过第二绝缘件绝缘。
本申请还提供一种电子设备，包括电池和用于容纳电池的本体，电池为上述电池1000，电池1000包括第一电池端口2225和第二电池端口2226，在电池1000固定在本体内的情况下，第一电池端口2225和第二电池端口2226用于分别与本体内的对应端口电性连接。
可选择地，在另一实施例中，为上述电池1000a，电池1000a包括第一电池端口2225、第二电池端口2226、第三电池端口650和第四电池端口660，在电池1000a固定在电子设备本体内的情况下，第一电池端口2225、第二电池端口2226、第三电池端口650和第四电池端口660用于分别与电子设备本体内的对应端口电性连接。从而，可以进一步提高充电效率。
综上所述可知本申请具有以上所述的优良特性，得以令其在使用上，增进以往技术中所未有的效能而具有实用性，成为一极具实用价值的产品。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的思想和原则之内所作的任何修改、等同替换或改进等，均应包含在本申请的保护范围之内。

Claims (19)

  1. 一种电池控制电路(22)，其特征在于，包括：
    第一连接端(221)，用于与电池的电芯(100)连接，所述第一连接端(221)包括正极(2212)、第一负极(2211)、和第二负极(2213)；
    第二连接端(222)，用于与所述电池外部的设备连接，所述第二连接端(222)包括第一正极端(2221)、第一负极端(2222)、第二正极端(2223)、和第二负极端(2224)；以及
    电路保护模组(223)，包括：
    第一开关单元(2231)，连接在所述正极(2212)和所述第一正极端(2221)之间；所述正极(2212)、所述第一开关单元(2231)、和所述第一正极端(2221)连接，所述第一负极端(2222)和所述第一负极(2211)连接，形成第一导电通路(2002)；
    第二开关单元(2232)，连接在所述正极(2212)和所述第二正极端(2223)之间；所述正极(2212)、所述第二开关单元(2232)、和所述第二正极端(2223)连接，所述第二负极端(2224)和所述第二负极(2213)连接，形成第二导电通路(2003)；以及
    控制单元(2233)，用于控制所述第一开关单元(2231)的导通或关断以及控制所述第二开关单元(2232)的导通或关断。
  2. 根据权利要求1所述的电池控制电路(22)，其特征在于，所述控制单元(2233)输出的电压与所述正极(2212)之间的电压的差大于等于4V。
  3. 根据权利要求1或2所述的电池控制电路(22)，其特征在于，所述电路保护模组(223)还包括电流采样单元(2234)，所述电流采样单元(2234)串联在所述第一正极端(2221)与所述正极(2212)之间，所述电流采样单元(2234)还串联在所述第二正极端(2223)与所述正极(2212)之间，所述控制单元(2233)用于基于所述电流采样单元(2234)的采样电流值控制所述第一开关单元(2231)和所述第二开关单元(2232)的导通或关断。
  4. 根据权利要求3所述的电池控制电路(22)，其特征在于，所述第一开关单元(2231)包括第一开关(S2)，所述第一开关(S2)串联在所述第一正极端(2221)与所述正极(2212)之间，所述第二开关单元(2232)包括第二开关(S3)，所述第二开关(S3)串联在所述第二正极端(2223)和所述正极(2212)之间，所述控制单元(2233)包括第一控制器(U1)，所述第一控制器(U1)分别与所述第一开关(S2)、所述第二开关(S3)、和所述电流采样单元(2234)连接而形成第一保护电路，所述第一保护电路用于基于所述电流采样单元(2234)的采样电流值控制所述第一开关(S2)和所述第二开关(S3)的导通或关断。
  5. 根据权利要求4所述的电池控制电路(22)，其特征在于，所述第一保护电路还包括第一电压采样电阻(RV1)和第二电压采样电阻(RV2)，所述第一控制器(U1)用于通过所 述第一电压采样电阻(RV1)采样所述第一负极(2211)和所述正极(2212)之间的第一电压值，并通过所述第二电压采样电阻(RV2)采样所述正极(2212)和所述第二负极(2213)之间的第二电压值，以得到所述第一电压值和所述第二电压值的第一电压均值。
  6. 根据权利要求5所述的电池控制电路(22)，其特征在于，所述第一控制器(U1)还用于获取所述电流采样单元(2234)的采样电流值，并且在所述采样电流值、所述第一电压均值的其中至少一个超过相应的保护阈值时，控制所述第一开关(S2)和所述第二开关(S3)关断。
  7. 根据权利要求3或4所述的电池控制电路(22)，其特征在于，所述第一开关单元(2231)包括第三开关(S1)，所述第三开关(S1)串联在所述第一正极端(2221)与所述正极(2212)之间，所述第二开关单元(2232)包括第四开关(S4)，所述第四开关(S4)串联在所述第二正极端(2223)和所述正极(2212)之间，所述控制单元(2233)包括第二控制器(U2)，所述第二控制器(U2)分别与所述第三开关(S1)、所述第四开关(S4)、和所述电流采样单元(2234)连接而形成第二保护电路，所述第二保护电路用于基于所述电流采样单元(2234)的采样电流值控制所述第三开关(S1)和所述第四开关(S4)的导通或关断。
  8. 根据权利要求7所述的电池控制电路(22)，其特征在于，所述第二保护电路还包括第三电压采样电阻(RV3)和第四电压采样电阻(RV4)，所述第二控制器(U2)用于通过所述第三电压采样电阻(RV3)采样所述第一负极(2211)和所述正极(2212)之间的第三电压值，并通过输送第四电压采样电阻(RV4)采样所述正极(2212)和所述第二负极(2213)之间的第四电压值，以得到所述第三电压值和所述第四电压值的第二电压均值。
  9. 根据权利要求8所述的电池控制电路(22)，其特征在于，所述第二控制器(U2)还用于获取所述电流采样单元(2234)的采样电流值，并且在所述采样电流值、第二电压均值的其中至少一个超过相应的保护阈值时，控制所述第三开关(S1)和所述第四开关(S4)关断。
  10. 根据权利要求1-9中任一项所述的电池控制电路(22)，其特征在于，所述第一正极端(2221)和所述第一负极端(2222)构成第一电池端口(2225)。
  11. 根据权利要求10中任一项所述的电池控制电路(22)，其特征在于，所述第二正极端(2223)和所述第二负极端(2224)构成第二电池端口(2226)。
  12. 根据权利要求11所述的电池控制电路(22)，其特征在于，流经所述第一电池端口(2225)和所述第二电池端口(2226)的电流具有相同的电流值。
  13. 根据权利要求3-12中任一项所述的电池控制电路(22)，其特征在于，所述电流采 样单元(2234)包括第一电流采样电阻(R1)和第二电流采样电阻(R2)。
  14. 根据权利要求13所述的电池控制电路(22)，其特征在于，所述第一电流采样电阻(R1)和所述第二电流采样电阻(R2)并联后，串联在所述第一正极端(2221)与所述正极(2212)之间，以及串联在所述第二正极端(2223)与所述正极(2212)之间。
  15. 一种电池(1000)，其特征在于，所述电池(1000)包括电芯(100)和第一充电保护装置(200)，所述第一充电保护装置(200)包括电路板(21)以及设置在所述电路板上的电池控制电路(22)，其中，所述电池控制电路为权利要求1-15中任一项所述的电池控制电路。
  16. 根据权利要求15所述的电池(1000)，其特征在于，所述电池还包括第一导电片(300)、第二导电片(400)、和第三导电片(500)；所述电芯(100)包括金属壳体(11)、极芯组件、第一盖板(12)、第一铆钉(13)；所述金属壳体(11)为钢壳壳体，所述金属壳体(11)具有内部空腔且设置有第一开口，所述极芯组件设置在所述金属壳体(11)内，所述第一盖板(12)盖在所述第一开口上，以将所述极芯组件收容在所述金属壳体(11)与所述第一盖板(12)形成的密闭空间内，所述第一铆钉(13)设置在所述第一盖板(12)上并与所述第一盖板(12)之间绝缘设置。
  17. 根据权利要求16所述的电池(1000)，其特征在于，所述第一充电保护装置(200)设置在所述电芯(100)具有所述第一铆钉(13)的一侧上，所述第一充电保护装置(200)具有与所述电芯(100)连接的第一连接端(221)，所述第一负极(2211)通过所述第一导电片(300)与所述第一盖板(12)连接，所述第二负极(2213)通过所述第三导电片(500)与所述第一盖板(12)连接，所述正极(2212)通过所述第二导电片(400)与所述第一铆钉(13)连接。
  18. 根据权利要求15-17中任一项所述的电池(1000)，其特征在于，所述第一盖板(12)上还设置有注液孔(14)，其中，所述注液孔(14)贯穿所述第一盖板(12)。
  19. 一种电子设备，其特征在于，包括如权利要求15-18中任一项所述的电池(1000)和用于容纳所述电池的本体，所述电池(1000)至少包括第一电池端口(2225)和第二电池端口(2226)，在所述电池(1000)固定在所述本体内的情况下，所述第一电池端口和第二电池端口用于分别与所述本体内的对应端口电性连接。
PCT/CN2023/071742 2022-01-30 2023-01-10 电池控制电路、电池及电子设备 WO2023143084A1 (zh)

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