Split battery circuit breaking unit and battery pack

Abstract

The present application relates to the field of new energy automobile battery technology, and particularly relates to a split type battery circuit breaking unit and a battery pack, comprising: a positive electrode module and a negative electrode module separated from each other; a first input end of the positive electrode module is connected to a battery module, and a first output end is connected to a positive electrode of a driving motor; a second input end of the negative electrode module is connected to the driving motor, and a second output end is connected to a negative electrode of the battery module; a first driving end of a positive electrode contactor is connected to a controller; and a second driving end of a negative electrode contactor is connected to the controller. The present application has the beneficial effect that: by setting the positive electrode module and the negative electrode module separated from each other, the volume of the battery circuit breaking unit is reduced, and the setting positions of the positive electrode module and the negative electrode module in the battery pack can be adjusted according to user requirements, so that the user can fully utilize the remaining space of the battery pack to set the positive electrode module and the negative electrode module when designing the battery pack, thereby reducing space waste and reducing research and development costs.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle battery technology, specifically to a split-type battery circuit breaker unit and battery pack. Background Technology

[0002] A battery pack refers to a power unit used in new energy vehicles. Typically, a battery pack consists of battery cells, connectors, and a power distribution unit, which charges and discharges under the control of the vehicle's infotainment system to supply power to the vehicle. The high-voltage power distribution unit (PDU) is the component in the battery pack responsible for power distribution and management, primarily handling functions such as charge / discharge control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control. To achieve better overall circuit protection, a dedicated battery disconnect unit (BDU) is often included in the battery pack for enhanced safety.

[0003] In the prior art, battery packs with battery circuit breaker units already exist. Typically, to achieve better fault isolation for new energy vehicles, these battery circuit breaker units are equipped with corresponding sensing devices and contact terminals, connected to a controller. The controller then controls the disconnection of the battery circuit breaker unit based on the detected power information. However, in practical implementation, the inventors have found that to achieve the above functions, the existing battery circuit breaker units are relatively large, thus occupying a significant amount of space within the battery pack and posing considerable difficulties for product design and development. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, a split-type battery circuit breaker unit and battery pack are provided.

[0005] The specific technical solution is as follows:

[0006] A split-type battery circuit breaker unit includes a positive electrode module and a negative electrode module that are separated from each other;

[0007] The first input terminal of the positive electrode module is connected to the positive terminal of a battery module, and the first output terminal of the positive electrode module is connected to the positive terminal of a drive motor.

[0008] The second input terminal of the negative electrode module is connected to the negative terminal of the drive motor, and the second output terminal of the negative electrode module is connected to the negative terminal of the battery module.

[0009] The positive electrode module is equipped with a positive electrode contactor, and the first driving terminal of the positive electrode contactor is connected to an external controller.

[0010] The negative electrode module is equipped with a negative electrode contactor, and the second drive terminal of the negative electrode contactor is connected to the controller.

[0011] Preferably, the positive electrode module includes a positive electrode shell, and the projected surface of the positive electrode shell is elongated.

[0012] The first input terminal and the first output terminal are respectively disposed on both sides of the positive electrode housing along the long axis of the positive electrode housing and point upwards from the positive electrode housing;

[0013] The positive electrode contactor is disposed inside the positive electrode housing, and the first driving end of the positive electrode contactor protrudes from the positive electrode housing along the short axis direction of the positive electrode housing.

[0014] Preferably, the positive electrode module further includes a smart fuse, and the positive electrode contactor and the smart fuse are sequentially arranged between the first input terminal and the first output terminal along the long axis of the positive electrode housing;

[0015] The positive contactor is connected to the first input terminal via a first positive copper busbar;

[0016] The positive contactor is connected to the smart fuse via a second positive copper busbar;

[0017] The smart fuse is connected to the first output terminal via a third positive copper busbar;

[0018] Each of the first positive copper busbar, the second positive copper busbar, and the third positive copper busbar is provided with a first output terminal connected to the controller;

[0019] The smart fuse includes a controlled terminal, which is connected to the controller.

[0020] Preferably, the first positive copper busbar is Z-shaped, extending from above the first input terminal, through the side of the positive contactor, to above the positive contactor;

[0021] The second positive copper busbar is Z-shaped and extends from above the positive contactor, through the side of the positive contactor, to above the smart fuse.

[0022] Preferably, the positive contactor includes a positive contactor housing, and the positive housing includes a positive housing base plate;

[0023] The positive electrode contactor housing and the positive electrode housing base plate are integrally formed.

[0024] Preferably, the negative electrode module includes a negative electrode shell, and the projected surface of the negative electrode shell is elongated.

[0025] The second input terminal and the second output terminal are respectively disposed on both sides of the negative electrode housing along the long axis of the negative electrode housing and point upwards from the negative electrode housing;

[0026] The negative electrode contactor is disposed inside the negative electrode housing, and the second driving end of the negative electrode contactor protrudes from the negative electrode housing along the short axis direction of the negative electrode housing.

[0027] Preferably, the negative electrode module further includes a current sensing module, which is disposed on the side of the negative electrode contactor near the second input terminal;

[0028] The current sensing module includes a sensing output terminal, which protrudes from the negative electrode housing along the short axis direction of the negative electrode housing. The current sensing module is connected to the controller through the sensing output terminal.

[0029] The second input terminal and the current sensing module are connected via the first negative copper busbar;

[0030] The current sensing module and the negative contactor are connected by a second negative copper busbar, which is shaped like a 7 and extends from the side of the negative contactor to the top of the negative contactor.

[0031] The negative contactor and the second output terminal are connected by a third negative copper busbar, which is Z-shaped and extends from the top of the negative contactor, through the side of the negative contactor, to the second output terminal.

[0032] The second negative copper busbar and the third negative copper busbar are each provided with a second output terminal connected to the controller.

[0033] Preferably, the negative contactor includes a negative contactor housing, and the negative housing includes a negative housing base plate;

[0034] The negative electrode contactor housing and the negative electrode housing base plate are integrally formed.

[0035] A battery pack includes a housing, within which a plurality of battery modules and the aforementioned battery circuit breaker unit are disposed, and the battery modules are connected to an external drive motor through the battery circuit breaker unit.

[0036] Preferably, the battery circuit breaker unit includes a positive electrode module and a negative electrode module that are separated from each other;

[0037] One side of the outer casing has an extension, and the projected surface of the extension is rectangular.

[0038] The extension portion is provided with the positive electrode module and the negative electrode module;

[0039] The long axis of the extension is arranged perpendicularly or horizontally to the edge of the outer casing.

[0040] The long axis of the positive electrode module and the long axis of the negative electrode module are arranged parallel to the long axis of the extension.

[0041] The above technical solution has the following advantages or beneficial effects: by setting up separate positive and negative modules, the overall volume of the battery circuit breaker unit can be reduced, and the positions of the positive and negative modules in the battery pack can be adjusted according to user needs. This allows users to make full use of the remaining space in the battery pack when designing the battery pack, reducing space waste and lowering R&D costs. Attached Figure Description

[0042] Embodiments of the invention will be described more fully with reference to the accompanying drawings. However, the drawings are for illustration and explanation only and do not constitute a limitation on the scope of the invention.

[0043] Figure 1 This is an overall schematic diagram of an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of the positive electrode module in an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the negative electrode module in an embodiment of the present invention;

[0046] Figure 4 This is an exploded view of the positive electrode module in an embodiment of the present invention;

[0047] Figure 5 This is an exploded view of the negative electrode module in an embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of the battery pack in an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of a battery circuit breaker unit placement method in an embodiment of the present invention;

[0050] Figure 8 This is a schematic diagram of the battery circuit breaker unit placement in another embodiment of the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0053] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0054] This invention includes:

[0055] A split-type battery circuit breaker unit, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a positive electrode module 1 and a negative electrode module 2 that are separated from each other;

[0056] The first input terminal 11 of the positive module 1 is connected to the positive terminal of a battery module A, and the first output terminal 12 of the positive module 1 is connected to the positive terminal of a drive motor B.

[0057] The second input terminal 21 of the negative electrode module 2 is connected to the negative terminal of the drive motor B, and the second output terminal 22 of the negative electrode module 2 is connected to the negative terminal of the battery module A.

[0058] A positive contactor 13 is provided inside the positive module 1, and the first drive terminal 131 of the positive contactor 13 is connected to an external controller C.

[0059] A negative contactor 23 is provided inside the negative module 2, and the second drive terminal 231 of the negative contactor 23 is connected to the controller C.

[0060] Specifically, addressing the issue that existing battery circuit breaker units are bulky and require significant space within the battery pack, this embodiment separates the positive electrode module 1 and negative electrode module 2 within the battery circuit breaker unit and connects them to the positive and negative circuits respectively. This allows for separate control of both circuits while enabling users to freely adjust the placement of the positive electrode module 1 and negative electrode module 2 within the battery pack, thereby reducing the space requirements of the battery circuit breaker unit within the battery pack.

[0061] As an optional implementation, depending on the user's different needs, a fuse box can be added between the positive terminal of the positive terminal module 1 and the positive terminal of the battery module A to achieve passive protection for the entire circuit, thereby improving the overall circuit safety. The fuse type and current carrying capacity within the fuse box can be set according to actual needs, and this does not constitute a limitation on this technical solution.

[0062] In a preferred embodiment, such as Figure 2 As shown, the positive electrode module 1 includes a positive electrode shell (not shown in the figure), and the projected surface of the positive electrode shell is elongated.

[0063] The first input terminal 11 and the first output terminal 12 are respectively disposed on both sides of the positive electrode shell along the long axis of the positive electrode shell and point upwards from the positive electrode shell.

[0064] A positive contactor 13 is provided inside the positive electrode housing, and the first driving end 131 of the positive contactor 13 protrudes from the positive electrode housing along the short axis direction of the positive electrode housing.

[0065] Specifically, addressing the issue of the large volume occupied by the battery circuit breaker unit in the prior art, this embodiment achieves a smaller volume by adjusting the placement of the first input terminal 11, the first output terminal 12, and the positive contactor 13. In one embodiment, the overall volume of the positive module 1 is 230mm*60mm*100mm.

[0066] In a preferred embodiment, the positive electrode module further includes a smart fuse 14, and the positive electrode contactor 13 and the smart fuse 14 are sequentially arranged between the first input terminal 11 and the first output terminal 12 along the long axis of the positive electrode housing.

[0067] like Figure 4 As shown, the positive contactor 13 is connected to the first input terminal 11 via the first positive copper busbar 15;

[0068] The positive contactor 13 is connected to the smart fuse 14 via the second positive copper busbar 16;

[0069] The smart fuse 14 is connected to the first output terminal 12 via the third positive copper busbar 17;

[0070] The first positive copper busbar 15, the second positive copper busbar 16 and the third positive copper busbar 17 are each provided with a first output terminal 18 connected to the controller;

[0071] Specifically, in view of the problem that the wiring harness connection between the modules of the battery circuit breaker unit in the prior art occupies a large space and has poor safety, this embodiment achieves wireless wiring by sequentially setting the first positive copper busbar 15, the second positive copper busbar 16 and the third positive copper busbar 17 to connect the first input terminal 11, the positive contactor 13, the smart fuse 14 and the first output terminal 12, thereby effectively reducing the volume of the positive module 1.

[0072] Furthermore, in this embodiment, by setting first output terminals 18 on the first positive copper busbar 15, the second positive copper busbar 16 and the third positive copper busbar 17 respectively, and connecting them to the controller C, the load on each part of the positive module 1 is effectively collected, so that the controller C can control according to the collected power information.

[0073] In implementation, the smart fuse 14 is a pyro switch, internally equipped with a conductive copper busbar and an explosive device for melting the conductive copper busbar. This explosive device is connected to a controller C via a controlled terminal. The controller C selects and outputs an detonation signal based on monitored power information, thereby triggering the detonation device and causing the conductive copper busbar to melt, achieving active protection. In one embodiment, the actuation time of the smart fuse 14 is approximately 2ms, effectively protecting the entire battery system. In another embodiment, the smart fuse 14 also integrates a current sensor, which detects the current flowing through the smart fuse 14 to determine if a circuit fault has occurred, thereby triggering the explosive device to achieve automatic circuit protection. The first output terminal 18 is an integrated quick-connect terminal formed by pressing a copper busbar. The specific design of this terminal can be implemented using existing technologies, such as the high-voltage sampling plug-in terminal disclosed in Chinese Patent CN202021818557.3, or other similar technologies.

[0074] In a preferred embodiment, such as Figure 4 As shown, the first positive copper busbar 15 is Z-shaped, extending from above the first input terminal 11, through the side of the positive contactor 13, to above the positive contactor 13.

[0075] The second positive copper busbar 16 is Z-shaped and extends from above the positive contactor 13, through the side of the positive contactor 13, to above the smart fuse 14.

[0076] The third positive copper busbar 17 is in a straight line, extending from above the smart fuse 14 to above the first output terminal 12.

[0077] Specifically, in response to the problem of the large size of the battery circuit breaker unit in the prior art, this embodiment adjusts the shape of the first positive copper busbar 15, the second positive copper busbar 16 and the third positive copper busbar 17 so that the first positive copper busbar 15, the second positive copper busbar 16 and the third positive copper busbar 17 can be attached to the surface of the positive contactor 13 and the smart fuse 14, thereby achieving a smaller overall connection structure and reducing the size of the positive module 1.

[0078] In a preferred embodiment, the positive contactor 13 includes a positive contactor housing, and the positive housing includes a positive housing base plate.

[0079] The positive contactor housing and the positive housing base plate are integrally formed.

[0080] Specifically, in response to the problem that the battery circuit breaker unit in the prior art is relatively large, this embodiment sets the positive contactor housing and the positive housing base plate as an integral molding, eliminating the bolts required to fix the positive contactor 13 in the prior art, thereby reducing the volume of the positive module 1.

[0081] In a preferred embodiment, such as Figure 3 As shown, the negative electrode module 2 includes a negative electrode shell (not shown in the figure), and the projected surface of the negative electrode shell is elongated.

[0082] The second input terminal 21 and the second output terminal 22 are respectively disposed on both sides of the negative electrode housing along the long axis of the negative electrode housing and point upwards from the negative electrode housing.

[0083] A negative electrode contactor 23 is provided inside the negative electrode housing, and the second drive end 231 of the negative electrode contactor protrudes from the negative electrode housing along the short axis direction of the negative electrode housing.

[0084] Specifically, addressing the issue of the large volume occupied by the battery circuit breaker unit in the prior art, this embodiment achieves a smaller volume by adjusting the placement of the second input terminal 21, the second output terminal 22, and the negative contactor 23. In one embodiment, the overall volume of the negative module 2 is 150mm*65mm*100mm.

[0085] In a preferred embodiment, such as Figure 5 As shown, the negative electrode module 2 also includes a current sensing module 24, which is disposed on the side of the negative electrode contactor 23 near the second input terminal 21.

[0086] The current sensing module 24 includes a sensing output terminal 241, which is exposed in the negative electrode housing along the short axis direction of the negative electrode housing. The current sensing module 24 is connected to the controller C through the sensing output terminal 241.

[0087] The second input terminal 21 and the current sensing module 24 are connected through the first negative copper busbar 25;

[0088] The current sensing module 24 and the negative contactor 23 are connected by a second negative copper busbar 26, which is shaped like a 7 and extends from the side of the negative contactor 23 to the top of the negative contactor 23.

[0089] The negative contactor 23 and the second output terminal 22 are connected by a third negative copper busbar 27. The third negative copper busbar 27 is Z-shaped and extends from the top of the negative contactor 23, through the side of the negative contactor 23, to the second output terminal 22.

[0090] The second negative copper busbar 26 and the third negative copper busbar 27 are each provided with a second output terminal 28 connected to the controller C.

[0091] Specifically, in response to the problem that the battery circuit breaker unit in the prior art is bulky due to the need to set up corresponding sensing devices, this embodiment sets the current sensing module 24 on the side of the negative contactor 23 and constructs a path from the second input terminal 21 through the first negative copper busbar 25, the current sensing module 24, the second negative copper busbar 26 to the negative contactor 23, thereby realizing the integration of the current sensing module 24 in the negative module 2 while reducing the overall size.

[0092] Furthermore, in response to the problem of the large size of the battery circuit breaker unit in the prior art, this embodiment adjusts the shape of the first negative copper busbar 25, the second negative copper busbar 26 and the third negative copper busbar 27 so that the first negative copper busbar 25, the second negative copper busbar 26 and the third negative copper busbar 27 can be attached to the surface of the negative contactor 23, thereby achieving a smaller overall connection structure and reducing the size of the negative module 2.

[0093] Meanwhile, in this embodiment, by setting second output terminals 28 on the second negative copper busbar 26 and the third negative copper busbar 27 respectively and connecting them to the controller C, the load on each part of the negative module 2 is effectively collected, which facilitates the controller C to control according to the collected power information.

[0094] During implementation, the second output terminal 28 is an integrated quick-connect terminal formed by pressing copper busbars. The specific design of this terminal can be achieved through existing technologies, such as the high-voltage sampling plug-in terminal disclosed in Chinese Patent CN202021818557.3, or other similar technologies.

[0095] In a preferred embodiment, the negative contactor 23 includes a negative contactor housing, and the negative housing includes a negative housing base plate.

[0096] The negative contactor housing and the negative housing base plate are integrally formed.

[0097] Specifically, in response to the problem that the battery circuit breaker unit in the prior art is relatively large, this embodiment sets the negative electrode contactor shell and the negative electrode shell base plate as an integral molding, eliminating the bolts required to fix the negative electrode contactor 23 in the prior art, thereby reducing the volume of the negative electrode module 1.

[0098] A battery pack includes a housing A1, inside which are disposed a plurality of battery modules A2 and the aforementioned battery circuit breaker unit D. The battery modules A2 are connected to an external drive motor B1 through the battery circuit breaker unit D.

[0099] Specifically, regarding the existing battery pack technology, the battery circuit breaker unit is too large, which requires a large outer shell to accommodate the battery circuit breaker unit. In this embodiment, the battery circuit breaker unit D is used on the battery pack, and a separable positive electrode module D1 and negative electrode module D2 are provided in the outer shell A1. This allows the battery circuit breaker unit D to be placed in a relatively narrow space, so that the battery pack does not need to have a large outer shell A1.

[0100] In a preferred embodiment, the battery disconnect unit D includes a positive electrode module D1 and a negative electrode module D2 that are separated from each other.

[0101] One side of the outer casing A1 has an extension A3, and the projected surface of the extension A3 is rectangular;

[0102] The extension section A3 is equipped with a positive electrode module D1 and a negative electrode module D2;

[0103] like Figure 7 and Figure 8 As shown, the long axis of the extension A3 is arranged perpendicularly or horizontally to the edge of the housing A1;

[0104] The long axis of the positive electrode module D1 and the long axis of the negative electrode module D2 are parallel to the long axis of the extension A3.

[0105] Specifically, to achieve a smaller overall size of the battery pack, this embodiment uses separate positive and negative electrode modules D1 and D2 instead of the traditionally large cubic battery circuit breaker unit, allowing the battery circuit breaker unit D to be placed in a relatively narrow area on the side of the outer casing A1. Alternatively, for example... Figure 8 The T-shaped battery pack shown has a small extension A3. By adjusting the placement of the positive electrode module D1 and the negative electrode module D2, the battery circuit breaker unit D can be set in the relatively narrow extension A3.

[0106] The beneficial effects of this invention are as follows: by setting up separate positive and negative modules, the overall volume of the battery circuit breaker unit can be reduced, and the positions of the positive and negative modules in the battery pack can be adjusted according to user needs. This allows users to make full use of the remaining space in the battery pack when designing the battery pack, reducing space waste and lowering R&D costs.

[0107] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A split-type battery circuit breaker unit, characterized in that, It includes a positive electrode module and a negative electrode module that are separated from each other; The first input terminal of the positive electrode module is connected to the positive terminal of a battery module, and the first output terminal of the positive electrode module is connected to the positive terminal of a drive motor. The second input terminal of the negative electrode module is connected to the negative terminal of the drive motor, and the second output terminal of the negative electrode module is connected to the negative terminal of the battery module. The positive electrode module is equipped with a positive electrode contactor, and the first driving terminal of the positive electrode contactor is connected to an external controller. The negative electrode module is equipped with a negative electrode contactor, and the second driving terminal of the negative electrode contactor is connected to the controller. The positive electrode module includes a positive electrode shell, and the projected surface of the positive electrode shell is elongated. The first input terminal and the first output terminal are respectively disposed on both sides of the positive electrode housing along the long axis of the positive electrode housing and point upwards from the positive electrode housing; The positive electrode contactor is disposed inside the positive electrode housing, and the first driving end of the positive electrode contactor protrudes from the positive electrode housing along the short axis direction of the positive electrode housing; The positive electrode module also includes a smart fuse, and the positive electrode contactor and the smart fuse are sequentially arranged between the first input terminal and the first output terminal along the long axis of the positive electrode housing; The positive contactor is connected to the first input terminal via a first positive copper busbar; The positive contactor is connected to the smart fuse via a second positive copper busbar; The smart fuse is connected to the first output terminal via a third positive copper busbar; Each of the first positive copper busbar, the second positive copper busbar, and the third positive copper busbar is provided with a first output terminal connected to the controller; The first positive copper busbar is Z-shaped, extending from above the first input terminal, through the side of the positive contactor, to above the positive contactor. The second positive copper busbar is Z-shaped and extends from above the positive contactor, through the side of the positive contactor, to above the smart fuse; Multiple first output terminals are arranged on the same side and extend horizontally to the outside of the positive electrode module, so that the controller can acquire the load on each part of the positive electrode module; The negative electrode module includes a negative electrode shell, and the projected surface of the negative electrode shell is elongated. The second input terminal and the second output terminal are respectively disposed on both sides of the negative electrode housing along the long axis of the negative electrode housing and point upwards from the negative electrode housing; The negative electrode contactor is disposed inside the negative electrode housing, and the second driving end of the negative electrode contactor protrudes from the negative electrode housing along the short axis direction of the negative electrode housing.

2. The battery circuit breaker unit according to claim 1, characterized in that, The positive contactor includes a positive contactor housing, and the positive housing includes a positive housing base plate; The positive electrode contactor housing and the positive electrode housing base plate are integrally formed.

3. The battery circuit breaker unit according to claim 1, characterized in that, The negative electrode module also includes a current sensing module, which is disposed on the side of the negative electrode contactor near the second input terminal. The current sensing module includes a sensing output terminal, which protrudes from the negative electrode housing along the short axis direction of the negative electrode housing. The current sensing module is connected to the controller through the sensing output terminal. The second input terminal and the current sensing module are connected via the first negative copper busbar; The current sensing module and the negative contactor are connected by a second negative copper busbar, which is shaped like a 7 and extends from the side of the negative contactor to the top of the negative contactor. The negative contactor and the second output terminal are connected by a third negative copper busbar, which is Z-shaped and extends from the top of the negative contactor, through the side of the negative contactor, to the second output terminal. The second negative copper busbar and the third negative copper busbar are each provided with a second output terminal connected to the controller.

4. The battery circuit breaker unit according to claim 1, characterized in that, The negative contactor includes a negative contactor housing, and the negative housing includes a negative housing base plate; The negative electrode contactor housing and the negative electrode housing base plate are integrally formed.

5. A battery pack, characterized in that, It includes a housing, within which are disposed a plurality of battery modules and a battery circuit breaker unit as described in any one of claims 1-4, wherein the battery modules are connected to an external drive motor through the battery circuit breaker unit.

6. The battery pack according to claim 5, characterized in that, The battery circuit breaker unit includes a positive electrode module and a negative electrode module that are separated from each other; One side of the outer casing has an extension, and the projected surface of the extension is rectangular. The extension portion is provided with the positive electrode module and the negative electrode module; The long axis of the extension is arranged perpendicularly or horizontally to the edge of the outer casing. The long axis of the positive electrode module and the long axis of the negative electrode module are arranged parallel to the long axis of the extension.

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