Battery protection board, battery assembly, and electric device

Abstract

The present disclosure relates to the technical field of energy storage, and relates to a battery protection board, a battery assembly, and an electric device. The battery protection board comprises: a chip, which comprises a plurality of pins; a plurality of pad groups adapted to connect the chip and battery cells; a first connector, which is connected to the at least two pad groups and is adapted to short-circuit or disconnect the two pad groups; and a second connector, which is connected between two pins and is adapted to couple or short-circuit or disconnect the two pins. Thus, the connection relationship between each pad and the chip in the battery protection board and the connection relationship between the pins of the chip can be configured on the basis of the actual quantity of battery cells in a battery pack, such that the same battery protection board can be configured with different quantities of battery cells without redesigning a circuit or replacing the chip, thereby reducing development costs and improving the expansibility of the battery protection board.

Description

Battery protection board, battery assembly and electric device

[0001] Cross-reference to related disclosures

[0002] The present disclosure claims priority to the Chinese patent publication No. 202422377941.9, filed on September 27, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of energy storage, and in particular to a battery protection board, a battery assembly and an electric device. BACKGROUND

[0004] As a core component of energy storage and conversion, batteries have been widely used in various portable devices, electric vehicles and large-scale energy storage systems.

[0005] Currently, in order to ensure the safety of the battery pack during charging and discharging and accurately detect the remaining power, the battery management system will accurately collect the operating data of each battery cell in the battery pack. Typically, during the manufacturing process of the circuit board, a specific chip is connected to the positive and negative poles of each battery cell in the battery pack to achieve the collection of the operating data of each battery cell. TECHNICAL PROBLEM

[0006] However, by connecting the chip to the positive and negative poles of each battery cell, when the number of batteries connected in series in the battery pack changes, since the connection between the chip and the battery cell has been fixed in the circuit board design stage, the circuit board must be redesigned to adapt to the new battery number configuration, resulting in poor scalability of the battery pack. TECHNICAL SOLUTION

[0007] The embodiments of the present disclosure provide a battery protection board, which improves the scalability of the battery pack to at least partially solve the above technical problems.

[0008] In order to achieve the above purpose, according to a first aspect of the present disclosure, a battery protection board is provided, comprising:

[0009] a chip comprising a plurality of pins;

[0010] a plurality of pad groups, the pad groups being adapted to connect the chip and the battery cell;

[0011] a first connecting piece connected to at least two of the pad groups, the first connecting piece being adapted to short-circuit or disconnect the two pad groups;

[0012] a second connecting piece connected between two of the pins, the second connecting piece being adapted to short-circuit or disconnect or couple connect the two pins.

[0013] In some embodiments, a third connector is further included, which is connected between the pin and the pad group to disconnect or connect the pin and the pad group.

[0014] In some embodiments, the first connector includes at least one first switch;

[0015] The first switch is connected to at least two pad groups respectively, and is adapted to short the at least two pad groups.

[0016] In some embodiments, the first connector includes at least one first adapter;

[0017] The first adapter is disposed on at least two pad groups, and is adapted to short the at least two pad groups.

[0018] In some embodiments, a first resistor is further included, which is disposed in series between the pin and the pad group;

[0019] The third connector includes at least one series switch, which is disposed in series with the first resistor.

[0020] In some embodiments, the third connector includes a plurality of first reserved pads, which are connected to the pin and the pad group respectively.

[0021] In some embodiments, the battery protection board includes a second resistor, at least one of which is disposed on the first reserved pad to establish a connection between the pin and the pad group.

[0022] In some embodiments, a first capacitor is further included, which is disposed in parallel between two pins; the second connector includes at least one parallel switch, which is disposed in parallel with the first capacitor.

[0023] In some embodiments, the second connector includes a second reserved pad;

[0024] The second reserved pad is connected to two pins respectively.

[0025] In some embodiments, the second connector includes a second capacitor;

[0026] The second capacitor is adapted to be disposed on the second reserved pad to couple the two pins.

[0027] In some embodiments, the second connector includes a third resistor;

[0028] The third resistor is mounted on the second reserved pad and is adapted to short the two pins.

[0029] In some embodiments, the third resistor is a 0-ohm resistor.

[0030] In some embodiments, each pad group is insulated from each other, and each pad group comprises one or more sub-pads; the sub-pads are adapted to be connected with the pins and / or the electric core of the chip.

[0031] In some embodiments, the battery protection plate further comprises a conductor sheet adapted to electrically connect the sub-pads in each pad group.

[0032] In some embodiments, the chip is a plurality of chips, and the chips are adapted to be connected with the pads.

[0033] According to a second aspect of the present disclosure, a battery assembly is provided, comprising an electric core and a battery protection plate as claimed in any one of claims 1 to 15, and the electric core and the battery protection plate are electrically connected.

[0034] In some embodiments, the battery assembly further comprises a second adapter connected with the pad group on one side and connected with the electric core on the other side, and the second adapter is adapted to electrically connect the electric core and the battery protection plate.

[0035] According to a third aspect of the present disclosure, a power consumption device is provided, comprising a battery assembly as described above. Advantages

[0036] In the battery protection plate of the embodiments of the present disclosure, the connection relationship between the pads and the chips in the battery protection plate and the connection relationship between the pins of the chips can be configured according to the actual number of electric cores in the battery pack, so that the same battery protection plate can be configured with different numbers of electric cores without the need to redesign the circuit or replace the chips, thereby reducing the development cost and improving the expandability of the battery protection plate.

[0037] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0039] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals represent like parts:

[0040] FIG. 1 is a schematic diagram of a battery pack including four battery cells in the related art;

[0041] FIG. 2 is a schematic diagram of a battery pack including three battery cells in the related art;

[0042] FIG. 3 is a schematic diagram of a battery pack including two battery cells in the related art;

[0043] FIG. 4 is a schematic diagram of a circuit connection of a battery protection plate according to an exemplary embodiment of the present disclosure;

[0044] FIG. 5 is a schematic diagram of a circuit connection of a battery protection plate according to an exemplary embodiment of the present disclosure;

[0045] FIG. 6 is a schematic diagram of a pad group according to an exemplary embodiment of the present disclosure;

[0046] FIG. 7 is a schematic diagram of a sub-pad according to an exemplary embodiment of the present disclosure;

[0047] FIG. 8 is a schematic diagram of an assembly of a battery protection plate in the related art;

[0048] FIG. 9 is a schematic diagram of an assembly of a battery protection plate according to an exemplary embodiment of the present disclosure;

[0049] FIG. 10 is a schematic diagram of a connection of a first metal jumper according to an exemplary embodiment of the present disclosure;

[0050] FIG. 11 is a schematic diagram of a connection of a second metal jumper according to an exemplary embodiment of the present disclosure;

[0051] FIG. 12 is a schematic diagram of a first jumper tape according to an exemplary embodiment of the present disclosure;

[0052] FIG. 13 is a schematic diagram of a second jumper tape according to an exemplary embodiment of the present disclosure.

[0053] The reference numerals are explained as follows: 311, first adapter; 321, first reserved pad; 331, second reserved pad; 41, first pad group; 411, first sub-pad; 412, second sub-pad; 413, third sub-pad; 414, fourth sub-pad; 415, fifth sub-pad; 42, second pad group; 43, third pad group; 44, fourth pad; 45, fifth pad group; 46, sixth pad; 47, seventh pad; 49, first metal adapter; 410, second metal adapter; 5, first adapter strip; 51, first welding area; 52, first metal connecting area; 53, second welding area; 6, second adapter strip; 61, third welding area; 62, second metal connecting area; 63, fourth welding area.

[0054] Embodiments of the present disclosure

[0055] The technical solutions in the embodiments of the present disclosure will be described clearly and completely in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present disclosure.

[0056] Firstly, based on the content in the foregoing background art of the present disclosure, the background of the present disclosure is further described. Referring to FIG. 1 and FIG. 2, FIG. 1 is a schematic diagram of a battery pack obtained by connecting four battery cells in series and a chip (for example, a protection IC or a power gauge in the figure) connected thereto. Taking an example that each chip includes at least four pins, each pin is connected to the positive electrode of a battery cell through a series resistor. In combination with FIG. 2, FIG. 2 is a schematic diagram of a battery pack obtained by connecting three battery cells in series and a chip connected thereto. When the battery pack includes three battery cells, the chip only needs three pins to be connected to the battery cells correspondingly, and at this time, the other pin of the chip needs to be short-circuited to the adjacent pin. In combination with FIG. 3, FIG. 3 is a schematic diagram of a battery pack obtained by connecting two battery cells in series and a chip connected thereto. Similarly, when the battery pack includes two battery cells, the chip only needs two pins to be connected to the battery cells correspondingly, and at this time, the other two pins of the chip need to be short-circuited to the adjacent pins respectively. Therefore, when the number of battery cells included in the battery pack changes, the connection relationship of the chip connected to the battery cells needs to be changed synchronously, thereby causing the circuit to be redesigned and connected, increasing the development cost and development cycle.

[0057] In some embodiments, the first connecting piece is arranged to connect the pad groups at positions where the battery cells are not arranged, so that in the case that the battery cells are removed, the remaining still can work normally without open circuit, thereby realizing that the number of battery cells in the battery pack can be configured according to actual needs; and the second connecting piece is arranged to configure the connection relationship between the pins of the chip according to the actual number of battery cells in the battery pack.

[0058] A protection resistor is usually connected in series at each pin of the chip to limit the current and voltage flowing to each pin of the chip, so as to avoid large voltage or current directly flowing to each pin of the chip and causing damage to the chip. Therefore, in order to avoid damage to the chip, a third connecting member is further arranged on the battery protection board.

[0059] Therefore, according to a first aspect of the present disclosure, the present disclosure provides a battery protection board, comprising a chip, a plurality of pad groups, a first connecting member and a second connecting member, the chip comprising a plurality of pins; the plurality of pad groups are adapted to connect the battery cell and the pins of the chip; the first connecting member is connected with at least two pad groups, and is adapted to short-circuit or disconnect the two pad groups; the second connecting member is connected between two pins, and is adapted to short-circuit or disconnect the two pins.

[0060] As an example, the chip can be a protection IC and / or a power gauge. The protection IC is used for safety protection of overcharge, overdischarge, short circuit and the like of the battery cell, and the protection IC collects the voltage of each battery cell in the battery pack to ensure that each battery cell is not damaged due to overcharge or overdischarge. The power gauge is used to estimate the remaining capacity (SOC, State of Charge) or remaining use time of the battery cell, and the power gauge usually collects information such as voltage and current of each battery cell to calculate the overall power of the battery pack composed of the battery cells.

[0061] In the above embodiments, through the cooperation of the first connecting member, the third connecting member and the second connecting member, the connection relationship between each pad and the chip in the battery protection board and the connection relationship between the pins of the chip can be configured according to the actual number of battery cells in the battery pack, so that the same battery protection board can be configured with different numbers of battery cells without the need to redesign the circuit or replace the chip, thereby reducing the development cost and improving the expandability of the battery protection board.

[0062] In some embodiments, each pad group is insulated from each other, and each pad group comprises one or more sub-pads; the sub-pads are adapted to be electrically connected with the pins of the chip and / or the battery cell.

[0063] In some embodiments, the battery cell is a plurality of battery cells.

[0064] In some embodiments, the battery protection board further comprises a conductor sheet adapted to electrically connect the sub-pads in each pad group.

[0065] Embodiment 1

[0066] In some embodiments, the first connecting member comprises at least one first switch; the first switch is connected with at least two pad groups respectively, and is adapted to disconnect or short-circuit the at least two pad groups.

[0067] As an example, the first switch can include a first control switch S11 and a second control switch S21. If a battery pack including three battery cells is needed to be configured, the first control switch S11 is closed, and the fourth battery cell B41 is removed, and the equivalent circuit diagram can refer to FIG. 2. If a battery pack including two battery cells is needed to be configured, the first control switch S11 and the second control switch S21 are closed at the same time, and the third battery cell B31 and the fourth battery cell B41 are removed, and the equivalent circuit diagram can refer to FIG. 3.

[0068] In the above embodiment, by short-circuiting the pad groups through the first switch, the pad groups are conducted without setting the battery cells, acting as a wire, so that the circuit can still be normally conducted after removing the unnecessary battery cells, realizing the reduction of the number of battery cells in the battery pack.

[0069] In some embodiments, the battery protection board further includes a first resistor arranged in series between the pin and the pad group; the third connecting member includes at least one series switch arranged in series with the first resistor.

[0070] In combination with FIG. 4, as an example, taking a battery pack including four battery cells as an example, taking a chip as a protection IC as an example, the first resistor includes a first series resistor R11, a second series resistor R21, a third series resistor R31, and a fourth series resistor R41, the first series resistor R11 is arranged in series between the positive connection end of the fourth battery cell B41 and the pin VC4 of the protection IC, the second series resistor R21 is arranged in series between the positive connection end of the third battery cell B31 and the pin VC3 of the protection IC, the third series resistor R31 is arranged in series between the positive connection end of the second battery cell B21 and the pin VC2 of the protection IC, and the fourth series resistor R41 is arranged in series between the positive connection end of the first battery cell B11 and the pin VC1 of the protection IC. Taking a battery pack including four battery cells as an example, taking a chip as a power gauge as an example, the first resistor includes a fifth series resistor R51, a sixth series resistor R61, a seventh series resistor R71, and an eighth series resistor R81, the fifth series resistor R51 is arranged in series between the positive connection end of the fourth battery cell B41 and the pin VC4 of the power gauge, the sixth series resistor R61 is arranged in series between the positive connection end of the third battery cell B31 and the pin VC3 of the power gauge, the seventh series resistor R71 is arranged in series between the positive connection end of the second battery cell B21 and the pin VC2 of the power gauge, and the eighth series resistor R81 is arranged in series between the positive connection end of the first battery cell B11 and the pin VC1 of the power gauge.

[0071] With reference to FIG. 4, taking the chip as a protection IC for example, the series switches can include a first series switch S3 and a second series switch S5, the first series switch S3 is in series with a second series resistor R21, and the second series switch S5 is in series with a third series resistor R31. When a battery pack including three battery cells is needed, the first series switch S3 is controlled to be turned off, so that the second series resistor R21 is disconnected from the pin VC3 of the protection IC, and the equivalent circuit diagram can refer to FIG. 2. When a battery pack including two battery cells is needed, the first series switch S3 and the second series switch S5 are controlled to be turned off, so that the second series resistor R21 and the third series resistor R31 are disconnected from the pins VC3 and VC2 of the protection IC respectively, and the equivalent circuit diagram can refer to FIG. 3. Taking the chip as a battery gauge for example, the series switches can include a third series switch S7 and a fourth series switch S9, the third series switch S7 is in series with a sixth series resistor R61, and the fourth series switch S9 is in series with a seventh series resistor R71. When a battery pack including three battery cells is needed, the third series switch S7 is controlled to be turned off, and the equivalent circuit diagram can refer to FIG. 2. When a battery pack including two battery cells is needed, the third series switch S7 and the fourth series switch S9 are controlled to be turned off, and the equivalent circuit diagram can refer to FIG. 3.

[0072] In some embodiments, the battery protection board further includes a first capacitor arranged in parallel between two pins; the second connecting member includes at least one parallel switch, and the parallel switch is arranged in parallel with the first capacitor. Wherein, the capacitor can absorb noise and interference in the circuit to improve the accuracy of the chip in collecting the voltage of the battery cell.

[0073] With reference to FIG. 4, taking the chip as a protection IC including four pins VC1, VC2, VC3 and VC4 for example, the first capacitor includes a first parallel capacitor C11, a second parallel capacitor C21, a third parallel capacitor C31 and a fourth parallel capacitor C41; the first parallel capacitor C11 is connected in parallel between the pins VC3 and VC4 of the protection IC, the second parallel capacitor C21 is connected in parallel between the pins VC2 and VC3 of the protection IC, the third parallel capacitor C31 is connected in parallel between the pins VC1 and VC2 of the protection IC, and the fourth parallel capacitor C41 is connected in parallel between the pin VC1 of the protection IC and the ground. Taking the chip as a battery gauge including four pins VC1, VC2, VC3 and VC4 for example, the first capacitor includes a fifth parallel capacitor C51, a sixth parallel capacitor C61, a seventh parallel capacitor C71 and an eighth parallel capacitor C81; the fifth parallel capacitor C51 is connected in parallel between the pins VC3 and VC4 of the battery gauge, the sixth parallel capacitor C61 is connected in parallel between the pins VC2 and VC3 of the battery gauge, the seventh parallel capacitor C71 is connected in parallel between the pins VC1 and VC2 of the battery gauge, and the eighth parallel capacitor C81 is connected in parallel between the pin VC1 of the battery gauge and the ground.

[0074] With reference to Fig. 4, taking the chip as a protection IC for example, the parallel switch can include a first parallel switch S4 and a second parallel switch S6, the first parallel switch S4 is in parallel with a first parallel capacitor C11, and the second parallel switch S6 is in parallel with a second parallel capacitor C21. When a battery pack including three battery cells is needed, the first parallel switch S4 is controlled to be closed, so that the pins on both sides of the first parallel capacitor C11 are short-circuited, i.e., the pins VC3 and VC4 of the protection IC are short-circuited, and the equivalent circuit diagram can refer to Fig. 2. When a battery pack including two battery cells is needed, the first parallel switch S4 and the second parallel switch S6 are controlled to be closed, so that the pins on both sides of the first parallel capacitor C11 and the second parallel capacitor C21 are short-circuited, i.e., the pins VC2, VC3 and VC4 of the protection IC are short-circuited, and the equivalent circuit diagram can refer to Fig. 3. Taking the chip as a power gauge for example, the parallel switch can include a third parallel switch S8 and a fourth parallel switch S10, the third parallel switch S8 is in parallel with a fifth parallel capacitor C51, and the fourth parallel switch S10 is in parallel with a sixth parallel capacitor C61. When a battery pack including three battery cells is needed, the third parallel switch S8 is controlled to be closed, so that the pins on both sides of the fifth parallel capacitor C51 are short-circuited, i.e., the pins VC3 and VC4 of the power gauge are short-circuited, and the equivalent circuit diagram can refer to Fig. 2. When a battery pack including two battery cells is needed, the third parallel switch S8 and the fourth parallel switch S10 are controlled to be closed, so that the pins on both sides of the fifth parallel capacitor C51 and the sixth parallel capacitor C61 are short-circuited, i.e., the pins VC2, VC3 and VC4 of the power gauge are short-circuited, and the equivalent circuit diagram can refer to Fig. 3.

[0075] It should be noted that the parallel switch and the series switch in the present disclosure can also be replaced by a relay, and any component that can control the disconnection or connection of the corresponding circuit can be used as the parallel switch and the series switch in the present disclosure, which is not limited herein.

[0076] Embodiment 2

[0077] In the above embodiment 1, the first resistor and the first capacitor need to be first arranged on the pad group, and then the on-off of the first resistor and the first capacitor is controlled through the switch state of the first switch, the parallel switch and the series switch, so as to realize the functions of the first connecting piece, the third connecting piece and the second connecting piece. The difference between embodiment 2 and embodiment 1 is that, in embodiment 2, the functions of the first connecting piece, the third connecting piece and the second connecting piece are realized by selectively arranging corresponding components or not arranging any components on the pad group, without the need to prearrange the first resistor and the first capacitor, and without the need to prearrange the switch component; the following will introduce embodiment 2 in detail.

[0078] In some embodiments, the first connecting member includes at least one first adapter 311; the first adapter 311 is arranged on at least two pad groups and is adapted to short-circuit the at least two pad groups.

[0079] Referring to FIG. 5, the fourth battery cell B41 in FIG. 4 is removed, and the two pad groups originally used to connect the fourth battery cell B41 are short-circuited by the first adapter 311 to serve as a wire, which is equivalent to the first control switch S11 being closed in FIG. 4. The first adapter 311 can be sized and shaped as needed to cover different numbers of pad groups.

[0080] Referring to FIG. 6, as an example, the battery pack includes four battery cells, and the pad groups include a first pad group 41, a second pad group 42, a third pad group 43, a fourth pad group 44, a fifth pad group 45, a sixth pad group 46, and a seventh pad group 47.

[0081] Referring to FIG. 7, the first pad group 41 includes a first sub-pad 411, a second sub-pad 412, a third sub-pad 413, a fourth sub-pad 414, and a fifth sub-pad 415. As an example, the first sub-pad 411, the second sub-pad 412, the third sub-pad 413, the fourth sub-pad 414, and the fifth sub-pad 415 can be connected by a metal conductor provided on the substrate 1, and any one or more sub-pads are connected to the negative electrode connection end of the first battery cell B11.

[0082] For example, in combination with FIG. 10, when a battery pack including two battery cells is needed, the first adapter 311 includes a first metal adapter sheet 49, and the bottom surface of the first metal adapter sheet 49 is commonly welded with the fourth pad group 44, the sixth pad group 46, and the seventh pad group 47. By providing the first metal adapter sheet 49, it is equivalent to closing the first control switch S11 and the second control switch S21. In combination with FIG. 11, when a battery pack including three battery cells is needed, the first adapter 311 includes a second metal adapter sheet 410, and the bottom surface of the second metal adapter sheet 410 is commonly welded with the sixth pad group 46 and the seventh pad group 47, which is equivalent to closing the first control switch S11.

[0083] In some embodiments, the first connecting member can be a nickel sheet, and other connecting sheets that can achieve pad group connection are also within the protection scope of the present disclosure.

[0084] In some embodiments, the third connecting member includes a plurality of first reserved pads 321, and the first reserved pads 321 are respectively connected to the pins and the pad groups. The first reserved pads 321 are adapted to disconnect or electrically connect the pins and the pad groups.

[0085] In some embodiments, the battery protection plate includes a second resistor, and at least one second resistor is arranged on the first reserved pad 321 to establish an electrical connection between the pin and the pad group.

[0086] As an example, in combination with FIG. 5, the first reserved pads 321 include H11-H81; when a battery pack containing three battery cells is needed, in the mounting process, the first reserved pad H11 in series with the pin VC3 of the protection IC, the third reserved pad H31, and the fourth reserved pad H41 can be mounted with a second resistor, the fifth reserved pad H51 in series with the pin VC3 of the coulometer, the seventh reserved pad H71, and the eighth reserved pad H81 can be mounted with a second resistor, and at the same time, the first reserved pad H21 in series with the pin VC3 of the protection IC can be left empty, and at the same time, the sixth reserved pad H61 in series with the pin VC3 of the coulometer can be left empty, to disconnect the pin of the chip and the positive connection end of the battery cell, and the implementation effect is equivalent to that of FIG. 2.

[0087] In some embodiments, the second connecting member includes a second reserved pad 331; the second reserved pad 331 is connected with two pins respectively, and the second reserved pad 331 is adapted to be arranged between the two pins to couple the two pins or short-circuit the two pins.

[0088] As an example, the second connecting member includes a second capacitor; the second capacitor is adapted to be arranged on the second reserved pad 331 to couple the two pins. The second connecting member includes a third resistor; the third resistor is mounted on the second reserved pad 331 and is adapted to short-circuit the two pins. The third resistor is a 0-ohm resistor. The third resistor can be mounted between adjacent pins of a chip without a capacitor through the mounting process, to short-circuit the adjacent pins of the chip without a capacitor.

[0089] It should be noted that the third resistor can also be a wire or a resistor with a low resistance, which can achieve short-circuiting between pins, and is not limited herein.

[0090] As an example, in combination with FIG. 5, the second reserved pads 331 include H12-H82. When a battery pack containing two battery cells is needed, in the mounting process, the second reserved pads H12 and H22 can be mounted with a third resistor, the second reserved pads H32 and H42 can be mounted with a second capacitor, at the same time, the second reserved pads H52 and H62 can be mounted with a third resistor, and the second reserved pads H72 and H82 can be mounted with a second capacitor, and the implementation effect is equivalent to that of FIG. 3.

[0091] It should be noted that the second resistor is a resistor with a certain resistance, which is not specifically limited herein.

[0092] According to a second aspect of the present disclosure, a battery assembly is provided, including a battery cell and a battery protection plate as described above, and the battery cell and the battery protection plate are electrically connected.

[0093] As an example, the third connecting piece is connected to the pad group on one side and connected to the battery cell on the other side, and the third connecting piece is suitable for electrically connecting the battery cell and the battery protection plate.

[0094] Referring to FIG. 9, in some embodiments, the battery protection plate further comprises a second adapter piece, one side of the second adapter piece is connected to any one or more sub-pads in the pad group, and the other side is connected to the positive or negative end of the battery cell.

[0095] In combination with FIG. 8, which is an assembly diagram of a battery protection plate in the related art, the position of the pad in the related art is fixed and cannot move with the change of the position of the positive and negative electrodes of the battery cell. When the size of the battery cell changes, the battery protection plate needs to be reassembled to connect the positive electrode of the battery cell to the corresponding positive connection end and connect the negative electrode of the battery cell to the corresponding negative connection end.

[0096] As an example, the second adapter piece 48 is respectively welded with the corresponding sub-pads in the first pad group 41, the second pad group 42, the third pad group 43, and the fifth pad group 45. The length of the second adapter piece 48 is less than the total length of any pad group of the first pad group 41, the second pad group 42, the third pad group 43, and the fifth pad group 45. When the positions of the positive or negative electrodes of the first battery cell B11 and the second battery cell B21 change, the second adapter piece 48 moves on the sub-pads in the corresponding first pad group 41, second pad group 42, third pad group 43, and fifth pad group 45 to change the positions of the positive connection end and the negative connection end of the battery cell connected to the sub-pads, so that the positive connection end and the negative connection end of the battery cell can be connected to the corresponding positive connection end and negative connection end respectively when the positions of the positive and negative electrodes of the battery cell change, realizing the connection between the battery cells.

[0097] In some embodiments, the battery protection plate further comprises an adapter strip; the positive electrode of the battery cell and the negative electrode of the battery cell adjacent thereto are connected by the adapter strip.

[0098] Among them, the adapter strip connects the positive electrode of the battery cell to the corresponding positive connection end and connects the negative electrode of the battery cell to the corresponding negative connection end.

[0099] Referring to FIG. 12 and FIG. 13, as an example, the adapter strip includes a first adapter strip 5, a second adapter strip 6, a third adapter strip, and a fourth adapter strip. Among them, the first adapter strip 5 includes a first welding area 51, a first metal connecting area 52, and a second welding area 53. The first welding area 51 is connected to the second welding area 53 through the first metal connecting area 52. The back of the first welding area 51 of the first adapter strip 5 is welded with the fourth pad 44, and the back of the second welding area 53 is welded with the negative electrode of the third battery cell B31, thereby realizing the connection of the negative electrode of the third battery cell B31 to the negative connection end thereof.

[0100] As an example, the second adapter strip 6 comprises a third welding area 61, a second metal connecting area 62 and a fourth welding area 63. The third welding area 61 is connected with the fourth welding area 63 through the second metal connecting area 62. The back surface of the third welding area 61 of the second adapter strip 6 is welded with the metal adapter tab 410, and the back surface of the fourth welding area 63 is welded with the positive electrode of the third battery cell B31, so as to realize the connection of the positive electrode of the third battery cell B31 to its positive electrode connecting end.

[0101] In the above embodiment, the positive electrode of the third battery cell B31 is connected to its positive electrode connecting end through the first adapter strip 5, and the negative electrode of the third battery cell B31 is connected to its negative electrode connecting end through the second adapter strip 6, so as to realize the connection of the third battery cell B31 to the battery pack in series. Based on the same connection principle, the fourth battery cell B41 can be connected to the battery pack in series through the third adapter strip and the fourth adapter strip.

[0102] According to a third aspect of the present disclosure, a power consuming device is provided, comprising the battery assembly as described above.

[0103] The power consuming device can be a notebook computer, a tablet computer, a mobile phone, a two-wheeled or three-wheeled vehicle, a fuel automobile, a plug-in hybrid electric vehicle or a new energy vehicle, etc., which is not specifically limited in the present disclosure.

[0104] In the description of the present disclosure, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise specifically limited. It should be noted that the description of the back surface, the bottom surface, etc. in the present disclosure is only for clearer description of the technical solutions of the present disclosure, and does not constitute any specific limitation.

[0105] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0106] The embodiments, implementation manners and related technical features of the present disclosure can be combined or replaced with each other without conflict.

[0107] The above is only a preferred embodiment of the present disclosure, and does not limit the present disclosure in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present disclosure, without departing from the technical solution of the present disclosure, still falls within the scope of the technical solution of the present disclosure.

Claims

1. A battery protection plate, characterized in that, The battery protection board comprises: a chip comprising a plurality of pins; a plurality of pad groups adapted to connect the chip and the battery cell; a first connecting member connected with at least two of the pad groups, the first connecting member being adapted to short-circuit or disconnect the two pad groups; a second connecting member connected between two of the pins, the second connecting member being adapted to short-circuit or disconnect or couple the two pins.

2. The battery protection plate of claim 1, wherein, The battery protection board further comprises a third connecting member connected between the pad groups and the pins to disconnect or connect the pad groups and the pins.

3. The battery protection plate according to claim 1 or 2, characterized in that, The first connecting member comprises at least one first switch; The first switch is connected with at least two of the pad groups respectively, and is adapted to short-circuit or disconnect the at least two pad groups.

4. The battery protection plate according to any one of claims 1 to 3, characterized in that, The first connecting member comprises at least one first adapter (311); The first adapter is arranged on at least two of the pad groups, and is adapted to short-circuit the at least two pad groups.

5. The battery protection plate of claim 2, wherein, The battery protection board further comprises a first resistor arranged in series between the pins and the pad groups; The third connecting member comprises at least one series switch arranged in series with the first resistor.

6. The battery protection plate according to claim 2 or 5, characterized in that, The third connecting member comprises a plurality of first reserved pads (321); 7. The battery protection plate of claim 6, wherein, The first reserved pads are connected with the pins and the pad groups respectively.

8. The battery protection plate according to any one of claims 1 to 7, characterized in that, The battery protection board comprises a second resistor, and at least one of the second resistors is arranged on the first reserved pads to establish a connection between the pins and the pad groups.

9. The battery protection plate according to any one of claims 1 to 7, characterized in that, The battery protection board further comprises a first capacitor arranged in parallel between two of the pins; and the second connecting member comprises at least one parallel switch arranged in parallel with the first capacitor. The second connecting member comprises a second reserved pad (331); 10. The battery protection plate of claim 9, wherein, The second reserved pad is connected with two of the pins respectively. The second connecting member comprises a second capacitor; 11. The battery protection plate according to claim 9 or 10, characterized in that, The second capacitor is adapted to be arranged on the second reserved pad to couple the two pins. The second connecting member comprises a third resistor; 12. The battery protection plate of claim 11, wherein, The third resistor is arranged on the second reserved pad, and is adapted to short-circuit the two pins.

13. The battery protection plate according to any one of claims 1 to 12, characterized in that, The third resistor is a 0-ohm resistor.

14. The battery protection plate of claim 13, wherein, Each of the pad groups is insulated from each other, and each of the pad groups comprises one or more sub-pads; the sub-pads are adapted to be connected with the pins of the chip and / or the battery cell.

15. The battery protection plate according to any one of claims 1 to 14, characterized in that, The battery protection board further comprises a conductor sheet adapted to electrically connect the sub-pads in each of the pad groups.

16. A battery assembly characterized by, The chip is a plurality of chips, and the chips are adapted to be connected with the pads.

17. The battery assembly of claim 16, wherein, The battery assembly comprises a battery cell and the battery protection board according to any one of claims 1 to 15, and the battery cell and the battery protection board are electrically connected.

18. An electrical device, characterized by The battery assembly further comprises a second adapter connected with the pad groups on one side and connected with the battery cell on the other side, and the second adapter is adapted to electrically connect the battery cell and the battery protection board. The battery assembly comprises the battery assembly according to claim 16 or 17.

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