CN218242034U - Battery pack and vehicle with the battery pack - Google Patents

Abstract

The utility model discloses a battery pack and a vehicle with the battery pack. The battery pack includes: a casing, in which a high-potential cell group and a low-potential cell group are arranged; a disconnecting element, the disconnecting element is located in the casing, and the disconnecting element is connected in series to the Between the high potential module end of the high potential cell set and the low potential module end of the low potential cell set, the disconnecting element is adapted to disconnect the high potential module end and the low potential module end under the control of a disconnection control signal electrical connection between the low potential module terminals. According to the battery pack of the present invention, by setting the disconnecting element capable of disconnecting the electrical connection between the high-potential module end and the low-potential module end, the high-voltage circuit can be disconnected when the battery pack is abnormal, and the potential difference of the high-voltage circuit of the battery pack can be reduced. Thereby, the use safety of the battery pack is improved.

Description

Battery pack and vehicle with the battery pack

technical field

The utility model relates to the technical field of batteries, in particular to a battery pack and a vehicle with the battery pack.

Background technique

In the related art, the high-voltage safety protection design in the high-voltage circuit of the battery pack is generally to add an insulating protective layer between the battery pack and the battery case or between two adjacent battery packs, such as adding an insulating film, mica, and air condensation. Glue, etc., or add a maintenance switch (MSD), etc., to form a passive protection design. With the increasing integration of battery packs, the passive protection design reduces the integration efficiency of the package. When the high-voltage circuit in the battery pack leaks electricity or liquid, the traditional passive protection design cannot effectively protect and ensure high-voltage safety and thermal safety. And the fuse in the battery pack is usually set at the end of the entire circuit. When the current is too large, the fuse will blow, but the high-voltage circuit between adjacent battery packs will not be cut off, which will also affect the high-voltage safety and thermal safety of the battery pack.

Utility model content

The utility model aims to solve one of the above-mentioned technical problems in the prior art at least to a certain extent. For this reason, the utility model proposes a battery pack, which can effectively protect and ensure the high-voltage safety and thermal safety of the battery pack.

The utility model also proposes a vehicle with the above-mentioned battery pack.

The battery pack according to the embodiment of the present invention includes: a casing, in which a high-potential cell set and a low-potential cell set are arranged, and the high-potential cell set and the low-potential cell set are connected in series In the high-voltage circuit: a disconnecting element, the disconnecting element is located in the housing, and the disconnecting element is connected in series between the high potential module end of the high potential cell set and the low potential module of the low potential cell set Between terminals, the disconnecting element is adapted to disconnect the electrical connection between the high potential module terminal and the low potential module terminal under the control of a disconnect control signal.

According to the battery pack of the embodiment of the utility model, by setting a disconnecting element capable of disconnecting the electrical connection between the high potential module end and the low potential module end, the high voltage circuit can be disconnected when the battery pack is abnormal, and the high voltage of the entire battery pack can be reduced. The circuit potential difference improves the safety of the battery pack. At the same time, the disconnection element is connected in series between the high potential module end and the low potential module end, which can make reasonable use of the space between the high potential battery pack and the low potential battery pack. , and the series operation is convenient and fast, which can ensure a high integration rate of the battery pack.

According to some embodiments of the present invention, the battery pack further includes a battery management system, the battery management system is electrically connected to the disconnection element and configured to send the disconnection control signal to the disconnection element.

According to some embodiments of the present utility model, the disconnecting element is a relay or an intelligent fuse.

According to some embodiments of the present invention, the disconnecting element has a first connection end and a second connection end, the first connection end is electrically connected to the high potential module end, and the second connection end is connected to the The low potential module terminals are electrically connected.

Further, the first connection end is electrically connected to the high potential module end through a first connection element, and the second connection end is electrically connected to the low potential module end through a second connection element.

Optionally, the first connection element is fixed to the high potential module end by a first bolt, and the second connection element is fixed to the low potential module end by a second bolt.

According to some embodiments of the present invention, the first connection element is a conductor plate or a wire, and the second connection element is a conductor plate or a wire.

According to some embodiments of the present utility model, the housing includes a box body, a cell installation space is formed in the box, the disconnecting element is located in the cell installation space, and a maintenance window is opened on the box body , the disconnecting element is at least partially facing the maintenance window, and a detachable window cover is provided at the maintenance window.

According to some embodiments of the present invention, the housing includes a box body, and a disconnecting element installation space is formed in a box wall of the box body, and the disconnecting element is located in the disconnecting element installation space.

A vehicle according to another embodiment of the present utility model includes the above-mentioned battery pack.

According to the vehicle of the embodiment of the utility model, its battery pack includes a disconnecting element capable of disconnecting the electrical connection between the high-potential module end and the low-potential module end, which can disconnect the high-voltage circuit when the battery pack is abnormal, reducing the overall battery pack. The potential difference of the high-voltage circuit improves the safety of the battery pack, thereby improving the driving safety of the vehicle.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is a partial assembly schematic diagram of a battery pack according to an embodiment of the present invention;

Fig. 2 is a partially exploded schematic diagram of a battery pack according to an embodiment of the present invention;

Fig. 3 is an exploded schematic view of the high potential module end, the low potential module end, the disconnecting element, the window cover, etc.;

Fig. 4 is a schematic diagram of the connection between the disconnecting element and the high potential module end and the low potential module end;

Fig. 5 is a schematic diagram of the disconnecting element installed in the installation space of the disconnecting element in the box wall;

Fig. 6 is a partially enlarged schematic diagram of place A in Fig. 5;

FIG. 7 is a schematic diagram of a vehicle according to an embodiment of the present invention.

Reference signs:

Vehicle 100, battery pack 10, casing 1, box body 11, maintenance window 111, disconnecting element installation space 112, cover body 12, window cover plate 13, high potential cell pack 2, high potential module terminal 21, high potential First end plate 211, high potential connection plate 212, high potential second end plate 213, low potential cell set 3, low potential module end 31, low potential first end plate 311, low potential connection plate 312, low potential second end plate Two end plates 313, disconnecting element 4, first connecting end 41, second connecting end 42, first connecting element 51, second connecting element 52, first bolt 61, second bolt 62, window fixing bolt 63, maintenance Bolt 64, gasket 7.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", The orientation or positional relationship indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings , is only for the convenience of describing the utility model 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 should not be construed as a limitation of the utility model.

In addition, the terms "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. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components . Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The battery pack 10 according to the embodiment of the present invention and the vehicle 100 having the battery pack 10 will be described in detail below with reference to FIGS. 1-7 .

As shown in FIGS. 1-2 , a battery pack 10 according to an embodiment of the present invention may include: a housing 1 , a high-potential battery pack 2 , a low-potential battery pack 3 and a disconnection element 4 . Wherein, any one of the high-potential cell group 2 and the low-potential cell group 3 can be a cell module or a cell array formed by sequentially arranging a plurality of cells.

The battery cell installation space is formed in the housing 1, the high potential battery cell group 2 and the low potential battery cell group 3 are arranged in the battery cell installation space in the housing 1, the high potential battery cell group 2 and the low potential battery cell group 3 are both connected in series in the high voltage circuit. Wherein, the high-potential cell set 2 has a high-potential module end 21. Optionally, the high-potential module end 21 can be fixed to the high-potential cell set 2 by welding, or can be fixed to the high-potential cell by a fastener. Group 2, the high potential module terminal 21 is electrically connected to the high potential of the internal cells of the high potential cell group 2 . Similarly, the low-potential battery core set 3 has a low-potential module end 31. Optionally, the low-potential module end 31 can be fixed to the low-potential battery core set 3 by welding, or can be fixed to the low-potential electric core set 3 by fasteners. In the core set 3 , the low-potential module terminal 31 is electrically connected to the low-potential internal batteries of the low-potential battery set 3 .

The disconnecting element 4 is located in the housing 1, and the disconnecting element 4 is connected in series between the high potential module end 21 of the high potential cell set 2 and the low potential module end 31 of the low potential cell set 3, and the disconnecting element 4 is suitable for The electrical connection between the high potential module terminal 21 and the low potential module terminal 31 is disconnected under the control of the disconnect control signal. In other words, the disconnection element 4 can selectively disconnect the electrical connection between the high-potential module terminal 21 and the low-potential module terminal 31 when an abnormal situation occurs in the battery pack 10, which also disconnects the high-potential battery pack 2, the low-potential battery pack 2, and the low-potential module terminal 31. The electrical connection between the core packs 3, compared with the traditional passive disconnection protection method, the active disconnection protection method of the present utility model can immediately protect the battery pack 10 under abnormal conditions such as high voltage protection failure or thermal safety failure. Actively disconnect the high-voltage circuit and reduce the potential difference of the entire battery pack 10 high-voltage circuit (the highest potential is only 1/2 of the normal state), which can effectively switch the potential of the battery pack 10 from a high-risk high-voltage state to a relatively safe low-voltage state. The voltage state, the design of the battery pack 10 of the present invention has strong potential for further development, and is of great significance for increasing the overall safety level of the battery pack 10 .

In other words, the battery pack 10 has a built-in disconnecting element 4 that can be actively disconnected. The disconnecting element 4 is arranged in the middle of the highest potential Umax and the lowest potential Umin in the high-voltage circuit. The high potential part (i.e. the high potential module end 21), the negative end of the disconnecting element 4 is connected to the lower potential part (i.e. the low potential module end 31) in the high voltage circuit, and the disconnecting element 4 is used as a device for controllably disconnecting the high voltage circuit. In dangerous working conditions or other situations where the high-voltage circuit needs to be disconnected, the high-voltage circuit in the battery pack 10 can be controlled to be disconnected by disconnecting the control signal, thereby reducing the voltage level of the entire battery pack 10 .

According to the battery pack 10 of the embodiment of the present utility model, by setting the disconnecting element 4 capable of disconnecting the electrical connection between the high potential module end 21 and the low potential module end 31, the high voltage circuit can be disconnected when the battery pack 10 is abnormal, The potential difference of the high-voltage circuit of the entire battery pack 10 is reduced, thereby improving the use safety of the battery pack 10. At the same time, the disconnecting element 4 is connected in series between the high-potential module terminal 21 and the low-potential module terminal 31, which can reasonably utilize the high-potential battery pack. 2 and the low-potential battery pack 3, and the series operation is convenient and fast, which can ensure that the battery pack 10 has a high integration rate.

In some embodiments of the present utility model, the battery pack 10 may also include a battery management system (ie, BMS), the battery management system is electrically connected to the disconnection element 4, and the battery management system is used to send a disconnection control to the disconnection element 4 Signal. Specifically, when an abnormal situation occurs in the battery pack 10, for example, when an abnormal situation such as high voltage protection failure or thermal safety failure occurs in the battery pack 10, the battery management system will send a disconnection message to the disconnecting element 4 after grasping the abnormal situation of the battery pack 10. Turn on the control signal to disconnect the electrical connection between the high potential cell set 2 and the low potential cell set 3 .

In some embodiments of the present invention, the disconnecting element 4 is a relay. When the battery pack 10 is working normally, the two contacts of the relay are in a closed state. At this time, the high-potential cell set 2 and the low-potential cell set 3 are electrically connected through the relay. When an abnormal situation occurs in the battery pack 10, the relay actively disconnects the two contacts under the control of the disconnection control signal, that is, the two contacts are in the disconnected state at this time, and the high-potential cell group 2 and the low-potential cell group 3 Disconnect.

In some embodiments of the present invention, the disconnecting element 4 is a smart fuse. When the battery pack 10 is working normally, the smart fuse is in a continuous state. At this time, the high-potential cell set 2 and the low-potential battery pack 3 are electrically connected through the smart fuse. When an abnormal situation occurs in the battery pack 10, under the control of the disconnection control signal, the smart insurance fuses actively, and the high-potential battery pack 2 and the low-potential battery pack 3 are disconnected.

The actively disconnectable disconnecting element 4 (relay or smart insurance) built in the middle of the high-voltage circuit can actively disconnect the high-voltage circuit of the battery pack 10 at the first time when the battery pack 10 is in danger, reducing the voltage level of the battery pack 10, The potential difference between the high-voltage circuit in the battery pack 10 and the casing 1 is reduced, and the safety level of the battery pack 10 is improved under dangerous conditions. Dangerous situations can include insulation failure of the package body, thermal runaway scenarios or other situations that require active disconnection of the high-voltage circuit and lowering the voltage level of the battery pack 10 .

In some embodiments of the present invention, the disconnecting element 4 has a first connection end 41 and a second connection end 42, the first connection end 41 is electrically connected to the high potential module end 21, and the second connection end 42 is connected to the low potential module end. Terminal 31 is electrically connected. Specifically, the first connection end 41 is a positive end, and the second connection end 42 is a negative end.

Optionally, in some embodiments, the first connection end 41 is in direct contact with the high potential module end 21 to achieve electrical connection, and the second connection end 42 is in direct contact with the low potential module end 31 to achieve electrical connection.

In some other embodiments, as shown in FIGS. 2-4 , the first connection end 41 is electrically connected to the high potential module end 21 through the first connection element 51, and the second connection end 42 is electrically connected to the low potential module end 31 through the second The connecting element 52 is electrically connected. By providing the first connection element 51 and the second connection element 52, it is convenient to plan the position of the disconnection element 4, for example, between the disconnection element 4 and the high potential module end 21, between the disconnection element 4 and the low potential module end 31 There may be a certain distance to avoid other components, for example, the wire harness at the opposite end of the high potential battery core set 2 and the low potential battery core set 3 may be avoided, so as to reserve a wiring harness connection operation space.

Optionally, the first connecting element 51 and the first connecting end 41 of the disconnecting element 4 may be fixed by bolts, or may be fixed by welding (such as laser welding), and the second connecting element 52 and the disconnecting element 4 The second connecting ends 42 can be fixed by bolts, or can be fixed by welding (such as laser welding).

Optionally, the first connection element 51 is fixed to the high potential module end 21 by a first bolt 61 , and the second connection element 52 is fixed to the low potential module end 31 by a second bolt 62 . In this way, there is a detachable connection between the first connection element 51 and the high potential module end 21, and a detachable connection between the second connection element 52 and the low potential module end 31, which is convenient when the disconnection element 4 is irreversibly disconnected. It is also convenient to replace the disconnecting element 4 with a new disconnecting element 4 when the disconnecting element 4 is aged and damaged.

In some embodiments of the present invention, the first connection element 51 is a conductor plate or a wire, and the second connection element 52 is a conductor plate or a wire. For example, in the embodiment shown in FIG. 2, the first connection element 51 is a first conductor plate, one end of the first conductor plate is in contact with the first connection end 41 to realize electrical connection, and the other end of the first conductor plate is connected to the high potential The module end 21 is fixed by the first bolt 61 to realize electrical connection. Similarly, the second connection element 52 is a second conductor plate, one end of the second conductor plate is in contact with the second connection end 42 to realize electrical connection, and the other end of the second conductor plate is connected to the low potential module end 31 through a second bolt 62 fixed for electrical connection. In some embodiments not shown in the figure, both the first connection element 51 and the second connection element 52 may be wires, or one of the first connection element 51 and the second connection element 52 is a conductor plate, and the other for the wire.

In some other embodiments, the first connection element 51 and the high potential module end 21 can also be fixed by welding (such as laser welding), and the second connection element 52 and the low potential module end 31 can also be fixed by welding ( Such as laser welding) to achieve fixation.

In some embodiments of the present utility model, as shown in FIG. Connect the high potential first end plate 211 and the high potential second end plate 213, the high potential first end plate 211 is electrically connected with the high potential cell set 2, the high potential second end plate 213 and the first connecting element 51 pass through the first Bolts 61 are fixed for electrical connection. The low-potential module terminal 31 may include a low-potential first terminal plate 311, a low-potential second terminal plate 313, and a low-potential connecting plate 312, and the low-potential connecting plate 312 connects the low-potential first terminal plate 311 and the low-potential second terminal plate 313 , the low-potential first end plate 311 is electrically connected to the low-potential battery pack 3 , and the low-potential second end plate 313 is fixed to the second connection element 52 by the second bolt 62 to realize electrical connection. The axes of the first bolt 61 and the second bolt 62 may be parallel to simplify the assembly steps.

In some embodiments of the present utility model, the housing 1 includes a box body 11 and a cover body 12. The box body 11 is configured as a box-shaped structure with an open top, and a cell installation space is formed inside the box body 11. The disconnecting element 4 is located at the In the core installation space, the cover body 12 covers the opening of the box body 11 .

In some embodiments of the present utility model, the cover body 12 is connected to the box body 11 in a detachable manner, so that by removing the cover body 12, the installation and removal of the disconnecting element 4 in the cell installation space can be completed , maintenance and other operations.

In some other embodiments of the present invention, the cover body 12 and the box body 11 are connected as a whole, and the cover body 12 and the box body 11 may be connected by bonding, welding or integrally formed.

In some embodiments of the present utility model, a maintenance window 111 is provided on the box body 11, and the disconnecting element 4 is at least partly opposite to the maintenance window 111, and a detachable window cover plate 13 is provided at the maintenance window 111, so that through Removing the window cover plate 13 can complete the installation, removal, maintenance and other operations of the disconnecting element 4 in the cell installation space. When the cover 12 of the battery pack 10 is detachably connected to the box 11 , the disconnecting element 4 can be quickly disassembled and replaced through the maintenance window 111 without disassembling the cover 12 . Alternatively, when the cover body 12 of the battery pack 10 is welded or glued or integrally formed with the box body 11 , the disconnecting element 4 can be quickly disassembled and replaced through the maintenance window 111 .

In some embodiments of the present utility model, as shown in Fig. 2-Fig. Sealing properties between walls. The window cover plate 13 can be fixed to the box wall of the box body 11 by using the window fixing bolts 63 .

In some embodiments of the present utility model, as shown in FIGS. Component installation space 112. In a specific example, as shown in FIG. 2 and FIG. 5, the box body 11 includes a frame, and the frame surrounds the outer periphery of the high-potential battery pack 2 and the low-potential battery pack 3. The frame has a certain thickness, and the disconnection element The installation space 112 is opened in the frame, and the disconnection element 4 can be installed in the disconnection element installation space 112 of the frame by using the maintenance bolt 64. In this way, the disconnection element 4 does not occupy additional space in the housing and does not affect the interior of the battery pack 10. Space utilization. A detachable window cover plate 13 is provided on the side of the disconnecting component installation space 112 away from the high-potential cell set 2 and the low-potential cell set 3, and the window cover plate 13 can be fixed to the side of the box body 11 by using the window fixing bolts 63. In this way, by removing the window cover plate 13, operations such as installation, disassembly and maintenance of the disconnecting element 4 in the disconnecting element installation space 112 can be completed. Specifically, when the disconnecting element 4 is disassembled, only the window fixing bolt 63 , the maintenance bolt 64 , the first bolt 61 and the second bolt 62 are removed, and the maintenance and replacement of the disconnecting element 4 can be completed.

In some embodiments of the present invention, a crossbeam (not shown in the figure) is provided inside the casing 1 of the battery pack 10, and the crossbeam can be located under the high-potential battery pack 2 and the low-potential battery pack 3 to support the high The electric potential cell group 2 and the low potential cell group 3, the disconnecting element 4 can be installed on the beam by using the maintenance bolt 64, so that the disconnecting element 4 does not occupy additional space in the housing, and does not affect the space inside the battery pack 10 utilization rate. When disassembling the disconnecting element 4 , only the maintenance bolt 64 , the first bolt 61 and the second bolt 62 need to be disassembled to complete the maintenance and replacement of the disconnecting element 4 .

The disconnecting element 4 adopts a modular assembly design, that is, the disconnecting element 4 participates in assembly as a small assembly. In the case of maintenance and replacement, if the cover 12 of the battery pack can be disassembled, the For maintenance, if the cover 12 and box 11 of the battery pack 10 cannot be disassembled or the airtightness of the battery pack 10 cannot be damaged, the disconnecting element 4 can be disassembled separately through the maintenance window 111 integrated at the beam or frame, It is convenient for subsequent disassembly and repair.

The battery pack 10 of a specific example of the present invention is described below.

The battery pack 10 follows the existing battery pack structure, and integrates an actively disconnectable relay or an intelligent insurance structure on the frame or beam of the battery pack 10 (the relay or intelligent insurance can be selected to suit the current battery pack 10 overcurrent capacity and space volume), select the 10 potential points of the battery pack, connect them to the positive pole and the negative pole of the relay or smart insurance respectively, and connect the circuit through the relay or smart insurance. scenario, etc.), the high-voltage main circuit of the battery pack 10 can be actively disconnected at the first time. At this time, the highest potential at the left and right ends of the relay or smart insurance is only 1/2 of the normal voltage of the pack body, and the battery can be disconnected at the first time when danger occurs. The voltage of the package 10 is actively reduced to a relatively safe voltage range, which effectively reduces the risk of safety level in high-level working conditions.

Referring to FIG. 7 , a vehicle 100 according to another embodiment of the present invention includes the battery pack 10 of the above embodiment.

According to the vehicle 100 of the embodiment of the present invention, its battery pack 10 includes a disconnecting element 4 capable of disconnecting the electrical connection between the high potential module end 21 and the low potential module end 31, and can disconnect the high voltage when the battery pack 10 is abnormal. The circuit reduces the potential difference of the high-voltage circuit of the entire battery pack 10, thereby improving the safety of the battery pack 10 in use, thereby improving the driving safety of the vehicle 100. At the same time, the disconnecting element 4 is connected in series between the high-potential module end 21 and the low-potential module end 31, which can reasonably utilize the space between the high-potential cell set 2 and the low-potential cell set 3, and the series operation is convenient and quick, and can It is ensured that the battery pack 10 has a high integration rate.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples" or "some examples" mean specific features described in connection with the embodiment or example, A structure, material, or feature is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (10)

1. A battery pack, characterized in that, comprising: A casing (1), the casing (1) is provided with a high-potential cell set (2) and a low-potential cell set (3), the high-potential cell set (2) and the low-potential cell set The core groups (3) are all connected in series in the high-voltage circuit; A disconnection element (4), the disconnection element (4) is located in the housing (1), and the disconnection element (4) is connected in series at the high potential module end of the high potential electric core set (2) (21) and the low-potential module end (31) of the low-potential cell set (3), the disconnecting element (4) is adapted to disconnect the high-potential module under the control of a disconnection control signal The electrical connection between terminal (21) and said low potential module terminal (31). 2. The battery pack according to claim 1, characterized in that it further comprises a battery management system, the battery management system is electrically connected to the disconnecting element (4) and is used to provide power to the disconnecting element (4) sending the disconnect control signal. 3. The battery pack according to claim 1, characterized in that, the disconnecting element (4) is a relay or an intelligent fuse. 4. The battery pack according to claim 1, characterized in that, the disconnecting element (4) has a first connection end (41) and a second connection end (42), and the first connection end (41) It is electrically connected to the high potential module end (21), and the second connection end (42) is electrically connected to the low potential module end (31). 5. The battery pack according to claim 4, characterized in that, the first connection end (41) is electrically connected to the high potential module end (21) through a first connection element (51), and the second The connection end (42) is electrically connected to the low potential module end (31) through a second connection element (52). 6. The battery pack according to claim 5, characterized in that, the first connecting element (51) and the high potential module end (21) are fixed by first bolts (61), and the second connecting element (52) and the low potential module end (31) are fixed by second bolts (62). 7. The battery pack according to claim 5, characterized in that, the first connection element (51) is a conductor plate or a wire, and the second connection element (52) is a conductor plate or a wire. 8. The battery pack according to any one of claims 1-7, characterized in that, the casing (1) comprises a box (11), and a cell installation space is formed in the box (11), The disconnecting element (4) is located in the cell installation space, a maintenance window (111) is opened on the box body (11), and the disconnecting element (4) is at least Partially facing, the maintenance window (111) is provided with a detachable window cover (13). 9. The battery pack according to any one of claims 1-7, characterized in that, the housing (1) comprises a box (11), and a broken wall is formed in the box wall of the box (11). An element installation space (112) is opened, and the breaking element (4) is located in the breaking element installation space (112). 10. A vehicle, characterized by comprising the battery pack according to any one of claims 1-9.

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