Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a plurality of battery cells, a tray for carrying the battery cells, and a rear cross beam and an electrical bin which are respectively arranged at two ends of the tray, the battery cells are arranged along the length direction of the tray and are configured into two rows which are arranged at intervals in the width direction of the tray; a plurality of braces are arranged at the top of the battery pack, and two ends of each brace are respectively connected with the electrical cabin and the top of the rear cross beam; the brace located in the center of the top of the battery pack, the battery cells and the tray can define an exhaust channel; an anti-explosion valve is arranged on the side, facing the exhaust channel, of each battery cell, and an exhaust port communicated with the exhaust channel is formed in the electrical bin. According to the battery pack disclosed by the utility model, the exhaust channel formed by the battery cells, the brace and the tray is arranged, so that high-temperature and high-pressure gas generated by the battery cells can be exhausted out of the battery pack through the exhaust channel, the shell structure of the battery pack is simplified, and the internal space of the battery pack can be reasonably utilized; therefore, the compactness of the overall structure of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] With the rapid development of electric vehicles and energy storage systems, the performance optimization and safety enhancement of battery packs, as core components, have become a key focus of the industry. Battery packs must not only have high energy density and long cycle life, but also ensure safe operation under various extreme operating conditions. In particular, in the event of thermal runaway, they must be able to quickly and effectively discharge generated gases to prevent explosions or fires caused by a sudden increase in internal pressure.

[0003] In traditional battery packs, cells are typically stacked directly on a tray or placed in a battery pack casing. When thermal runaway occurs, the unclear gas exhaust path often leads to a rapid accumulation of internal pressure, increasing the risk of battery pack rupture and fire. Therefore, battery packs in the prior art typically reserve a gap between the cells and the tray as an exhaust channel, or integrate the exhaust channel into the battery pack casing structure. However, this design often sacrifices the space utilization of the battery pack and requires the addition of other structural components inside the battery pack or the modification of the casing structure to form the exhaust channel, which significantly increases the overall size and weight, resulting in a less compact overall battery pack structure. Utility Model Content

[0004] In view of this, the present invention aims to propose a battery pack that can promptly discharge the gas generated by thermal runaway when the battery cell thermal runaway occurs, thereby improving the safety of the battery pack, simplifying the structure of the battery pack, and improving the compactness of the overall structure of the battery pack.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A battery pack comprises a plurality of battery cells, a tray for carrying the battery cells, and a rear crossbeam and an electrical compartment respectively arranged at both ends of the tray; the battery cells are arranged along the length direction of the tray and are configured into two rows spaced apart in the width direction of the tray; a plurality of pull strips are provided on the top of the battery pack, and the two ends of each pull strip are respectively connected to the electrical compartment and the top of the rear crossbeam; the pull strip located in the center of the top of the battery pack can form an exhaust channel with the battery cells and the tray; an explosion-proof valve is provided on the side of each battery cell facing the exhaust channel, and an exhaust port connected to the exhaust channel is formed on the electrical compartment.

[0007] Furthermore, an isolation plate is attached to a side surface of each battery cell facing the exhaust channel.

[0008] Furthermore, a thermal insulation pad is sandwiched between two adjacent battery cells; the thermal insulation pad is made of aerogel, and foam strips are attached to both sides of the thermal insulation pad, and the foam strips are located at both ends of the thermal insulation pad in the horizontal direction.

[0009] Furthermore, each of the pull rods is bonded to the top of each of the battery cells by structural adhesive, and both ends of each of the pull rods are connected to the rear crossbeam and the top of the electrical compartment by welding or bolting.

[0010] Furthermore, the pole of each battery cell is arranged on a side surface opposite to the explosion-proof valve, and integrated busbars are provided on both sides of the poles of the two rows of battery cells.

[0011] Furthermore, the side of each integrated busbar facing outside the battery pack is covered with foam glue.

[0012] Furthermore, the two rows of battery cells are electrically connected through a copper busbar; the copper busbar is abutted against the outer side of the rear crossbeam, so that the rear crossbeam is sandwiched between the copper busbar and the two rows of battery cells; or a transversely penetrating cavity is formed in the rear crossbeam, and the copper busbar is inserted into the cavity.

[0013] Furthermore, the electrical warehouse includes a warehouse body arranged on the tray and connected to each of the pull strips, and a cover plate snapped on the warehouse body; windows for passing the exhaust and sampling interfaces are formed on both sides of the warehouse body, and the exhaust port is located on the warehouse body, and a protective cover is snapped on the exhaust port; a safety valve is provided at one end of the protective cover facing the cover plate, and a window corresponding to the safety valve is formed on the cover plate.

[0014] Furthermore, the compartment body is also provided with a battery management system slave board, a fuse and a high-voltage connector electrically connected to each of the battery cells; the high-voltage connector is fixed on a bracket inside the compartment body, and the interface of the high-voltage connector can extend through the cover plate to the outside of the electrical compartment.

[0015] Furthermore, a coolant flow channel is integrated in the tray, and two coolant connectors connected to the coolant flow are provided in the compartment body; the coolant connectors can extend through the cover plate to the outside of the electrical compartment.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The battery pack described in the present invention is provided with an exhaust channel formed by the battery cells, tie bars, and tray. When any battery cell experiences thermal runaway, the gas generated by the battery cell can enter the exhaust channel through the explosion-proof valve, allowing the high-temperature, high-pressure gas generated by the battery cell to be discharged outside the battery pack through the exhaust channel, thereby preventing the battery pack from expanding and rupturing due to excessive pressure, thereby improving the safety of the battery pack. At the same time, the exhaust channel is formed by the battery cells, tie bars, and tray, and each battery cell is fixed by the tie bars, tray, rear crossbeam, and front crossbeam. This simplifies the shell structure of the battery pack, enables the rational use of the internal space of the battery pack, avoids the use of other structural components, and thus improves the compactness of the overall structure of the battery pack.

[0018] In addition, an isolation plate is provided on the side of each battery cell facing the exhaust channel. The isolation plate can separate the battery cell from the exhaust channel to prevent high-temperature gas from damaging other battery cells. A thermal insulation pad is sandwiched between two adjacent battery cells. The thermal insulation pad is made of aerogel. It utilizes the good thermal insulation effect of aerogel to prevent the heat generated by the thermal runaway battery cell from being conducted to other battery cells, and foam strips are attached to both sides of the thermal insulation pad to ensure the fixing effect of the thermal insulation pad. The foam strips themselves can play a buffering role between adjacent battery cells. Each pull strip is bonded to the top of each battery cell by structural adhesive, which can effectively fix the battery cell. The pull strip is connected to the rear crossbeam and the electrical compartment by welding or bolts, and has good connection strength, thereby ensuring the overall structural strength of the battery pack.

[0019] In addition, the poles of each battery cell are arranged on the side opposite the explosion-proof valve, so that the positive and negative poles of the battery cell are both arranged on the two outer sides of the battery pack. By providing two integrated busbars, the poles of each battery cell can be connected and sampling can be performed on each battery cell, simplifying the structure of the battery pack. Each integrated busbar is covered with foam to provide protection for the two integrated busbars. The two columns of battery cells are electrically connected by a copper busbar, which is wrapped around the rear crossbeam to connect the two columns of battery cells together. Alternatively, the copper busbar can be inserted into the cavity of the rear crossbeam to protect the copper busbar.

[0020] Furthermore, the electrical compartment includes a compartment body provided on a tray and connected to each pull rod, and a cover plate snapped onto the compartment body. The coordinated arrangement of the compartment body and the cover plate facilitates the inspection and maintenance of the electrical components in the electrical compartment. At the same time, the provision of the protective cover can prevent the gas support in the exhaust channel from being directly discharged into the electrical compartment, thereby preventing the electrical components in the electrical compartment from being damaged. The compartment body is also provided with a battery management system slave board, a fuse, and a high-voltage connector electrically connected to each battery cell. The high-voltage connector is fixed to a bracket in the compartment body, and the interface of the high-voltage connector can extend through the cover plate to the outside of the electrical compartment, which can facilitate the connection of external lines to the battery pack of this embodiment and improve the sealing of the electrical compartment.

[0021] Finally, the tray is integrated with coolant channels, allowing the coolant to cool the individual battery cells. Two coolant connectors are located within the tray, allowing for flow communication with the coolant. External coolant circulation lines connect to these connectors outside the battery pack to prevent leaks from entering the electrical compartment and causing a short circuit, thereby improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the battery pack according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the battery pack according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of an arrangement of the copper busbars according to an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of another arrangement of the copper busbars according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the internal structure of the electrical compartment according to an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the internal structure of the electrical compartment according to an embodiment of the present utility model after omitting the protective cover and the coolant structure;

[0029] Description of reference numerals:

[0030] 1. Battery cells;

[0031] 101. Explosion-proof valve; 102. Isolation plate; 103. Integrated busbar; 104. Copper busbar;

[0032] 2. Pallet;

[0033] 3. Rear cross member;

[0034] 4. Electrical warehouse;

[0035] 401, chamber body; 4011, exhaust port; 4012, exhaust port; 4013, sampling port; 4014, protective cover; 4015, safety valve;

[0036] 402, cover; 4021, window;

[0037] 403. Battery management system slave board; 404. Fuse; 405. High-voltage connector; 406. Bracket;

[0038] 5. Pull strip;

[0039] 6. Thermal insulation pad;

[0040] 601, foam strips;

[0041] 7. Foam glue;

[0042] 8. Coolant connector;

[0043] 9. Middle crossbeam. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0045] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0046] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0047] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0048] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0049] This embodiment relates to a battery pack, the overall structure of which is as follows: Figure 1 、 Figure 2 As shown, it includes a battery cell 1, a tray 2 carrying the battery cell 1, and a rear crossbeam 3 and an electrical compartment 4 respectively arranged at both ends of the tray 2.

[0050] The battery cells 1 are arranged in a plurality and arranged along the length direction of the tray 2, and are arranged in two rows spaced apart in the width direction of the tray 2. A plurality of pull bars 5 are provided on the top of the battery pack, and the two ends of each pull bar 5 are respectively connected to the top of the electrical compartment 4 and the rear crossbeam 3, so as to fix the electrical compartment 4 and the rear crossbeam 3, as well as each battery cell 1. The pull bar 5 located in the center of the top of the battery pack can form an exhaust channel with each battery cell 1 and the tray 2. An explosion-proof valve 101 is provided on the side of each battery cell 1 facing the exhaust channel, and an exhaust port 4011 connected to the exhaust channel is formed on the electrical compartment 4.

[0051] As described above, by providing an exhaust channel formed by the battery cells 1, the tie bars 5, and the tray 2, when any battery cell 1 experiences thermal runaway, the gas generated by the battery cell 1 can enter the exhaust channel through the explosion-proof valve 101, allowing the high-temperature and high-pressure gas generated by the battery cell 1 to be discharged outside the battery pack through the exhaust channel, thereby preventing the battery pack from expanding or rupturing due to excessive pressure, thereby improving the safety of the battery pack. At the same time, the exhaust channel is formed by the battery cells 1, the tie bars 5, and the tray 2, and each battery cell 1 is fixed by the tie bars 5, the tray 2, the rear crossbeam 3, and the front crossbeam, which simplifies the shell structure of the battery pack, can reasonably utilize the internal space of the battery pack, avoids the use of other structural components, and thus improves the compactness of the overall structure of the battery pack.

[0052] Based on the above overall description, specifically, the battery pack of this embodiment secures each battery cell 1 solely through the tray 2, rear crossbeam 3, electrical compartment 4, and tie bars 5. Compared to the prior art, this eliminates the need for a portion of the battery pack housing structure, thereby reducing production costs. In practice, this embodiment also includes a central crossbeam 9, which is positioned between the battery cells 1 to further enhance the structural strength of the battery pack.

[0053] When thermal runaway occurs in a battery cell 1, high-temperature and high-pressure gas enters the exhaust channel. The high-temperature and high-pressure gas is likely to affect other battery cells 1 surrounding the exhaust channel. The high temperature of the gas is likely to damage other battery cells 1 and cause the thermal runaway to spread. Therefore, in order to ensure the safety of other battery cells 1 when thermal runaway occurs, Figure 2As shown, an isolation plate 102 is attached to the side surface of each battery cell 1 facing the exhaust channel in this embodiment. Through the setting of the isolation plate 102, the battery cell 1 can be separated from the exhaust channel to block the high-temperature gas in the exhaust channel, prevent the high-temperature gas from causing damage to other battery cells 1, ensure the safety of other battery cells 1, and thus further improve the safety of the battery pack.

[0054] In specific implementation, the isolation plate 102 of this embodiment can be made of mica board, which can effectively prevent high-temperature and high-pressure gas from damaging the battery cell 1 by utilizing the excellent high-temperature resistance and excellent electrical insulation performance of the mica board.

[0055] In addition, in this embodiment, a thermal insulation pad 6 is sandwiched between two adjacent battery cells 1. Specifically, the thermal insulation pad 6 is made of aerogel, and foam strips 601 are attached to both sides of the thermal insulation pad 6. The foam strips 601 are located at both ends of the thermal insulation pad 6. Taking advantage of the fact that aerogel has a good thermal insulation effect, when any battery cell 1 has a thermal runaway, the heat generated by the thermal runaway battery cell 1 is prevented from being transferred to other battery cells 1, thereby avoiding the occurrence of thermal runaway transmission and improving the safety of the battery pack. At the same time, the provision of the foam strips 601 enables the thermal insulation pad 6 to be effectively bonded and fixed between adjacent battery cells 1, ensuring the fixing effect of the thermal insulation pad 6, and the foam strips 601 themselves can play a buffering role between adjacent battery cells 1.

[0056] As a specific implementation, to ensure the overall structural strength of the battery pack, each tie bar 5 in this embodiment is bonded to the top of each battery cell 1 using structural adhesive, and the ends of each tie bar 5 are connected to the rear crossbeam 3 and the top of the electrical compartment 4 by welding or bolting. By bonding the tie bars 5 to the top of the battery cell 1, the battery cell 1 is effectively secured. At the same time, the tie bars 5, connected to the rear crossbeam 3 and the electrical compartment 4 by welding or bolting, provide a strong connection, tightening them to constrain each battery cell 1 along the length of the battery pack, thereby ensuring the overall structural strength of the battery pack.

[0057] In this embodiment, the poles of each battery cell 1 are arranged on a side surface opposite to the explosion-proof valve 101, and integrated busbars 103 are provided on both sides of the two rows of battery cells 1 provided with the poles. By arranging the poles relative to the explosion-proof valve 101, the positive and negative poles of the battery cells 1 are both arranged on the two outer sides of the battery pack, and by providing two integrated busbars 103 respectively, the poles of each battery cell 1 can be connected and each battery cell 1 can be sampled. Compared with the battery pack composed of short-blade battery cells 1 with poles on both sides in the prior art, the number of integrated busbars 103 is reduced, the structure of the battery pack can be simplified, and the production of the battery pack of this embodiment is facilitated, and the production cost of the battery pack is reduced.

[0058] Furthermore, in this embodiment, each integrated busbar 103 is covered with a foam adhesive 7 on the side facing the outside of the battery pack. This foam adhesive 7 protects the two integrated busbars 103, preventing them from being damaged by bumps and collisions that could affect the normal operation of the battery pack. Furthermore, the foam adhesive 7 isolates the electrical connection area and the operating area of ​​the integrated busbar 103 and seals the sides of the battery pack, preventing short circuits.

[0059] Since the poles of the two rows of cells 1 in the battery pack are located on both sides of the battery pack, in order to connect the two rows of cells 1 together, Figure 3 As shown, the two columns of battery cells 1 in this embodiment are electrically connected via a copper busbar 104. The copper busbar 104 is placed against the outside of the rear crossbeam 3, so that the rear crossbeam 3 is sandwiched between the copper busbar 104 and the two columns of battery cells 1. The copper busbar 104 surrounds the rear crossbeam 3, thereby connecting the two columns of battery cells 1 together. In a specific implementation, the copper busbar 104 of this embodiment is used to surround the rear crossbeam 3 and be exposed to the outside of the battery pack. Therefore, the outer surface of the copper busbar 104 of this embodiment can preferably be covered with an insulating outer layer to prevent the copper busbar 104 from contacting the external structure of the battery pack and causing leakage of the battery pack.

[0060] Alternatively, in order to further improve the protection effect of the copper bus 104, as Figure 4 As shown, a transversely extending cavity is formed within the rear crossbeam 3 of this embodiment, and a copper busbar 104 is inserted into the cavity. By inserting the copper busbar 104 into the cavity, the rear crossbeam 3 can protect the copper busbar 104. In practice, the rear crossbeam 3 of this embodiment is supported by a hollow profile, which provides good structural strength while leaving ample space within the rear crossbeam 3 for inserting the copper busbar 104.

[0061] As a specific implementation form, Figure 5 、 Figure 6As shown, the electrical compartment 4 of this embodiment includes a compartment body 401 disposed on the tray 2 and connected to each pull bar 5, and a cover plate 402 snapped onto the compartment body 401. Windows for passing through the exhaust pipe 4012 and the sampling interface 4013 are formed on both sides of the compartment body 401, and an exhaust port 4011 is located on the compartment body 401. A protective cover 4014 is buckled over the exhaust port 4011. A safety valve 4015 is provided on the end of the protective cover 4014 facing the cover plate 402, and a window 4021 corresponding to the safety valve 4015 is formed on the cover plate 402. The coordinated arrangement of the compartment body 401 and the cover plate 402 facilitates the inspection and maintenance of the electrical components in the electrical compartment 4. At the same time, the provision of protective cover 4014 prevents the gas support 406 in the exhaust duct from being discharged directly into the electrical compartment 4. Instead, it allows the gas to be discharged outside the battery pack through safety valve 4015 and window 4021 in cover plate 402, thereby preventing damage to the electrical components within the electrical compartment 4. Furthermore, safety valve 4015 not only allows gas to be discharged, but also prevents foreign matter such as gas or liquid from outside the battery pack from entering the electrical compartment 4, thereby ensuring the reliability of the battery pack.

[0062] Specifically, the compartment body 401 of this embodiment also houses a battery management system slave board 403 electrically connected to each battery cell 1, a fuse 404, and a high-voltage connector 405. The high-voltage connector 405 is secured to a bracket 406 within the compartment body 401, and its interface extends through the cover 402 to the exterior of the electrical compartment 4. By allowing the interface of the high-voltage connector 405 to extend through the cover 402 to the exterior of the electrical compartment 4, external wiring can be easily connected to the battery pack of this embodiment. Furthermore, the cover 402 of the electrical compartment 4 isolates the electrical components within the compartment 4 from the external environment, thereby improving the sealing of the compartment 4.

[0063] In addition, the tray 2 of this embodiment is integrated with a coolant flow channel, and two coolant connectors 8 are provided in the compartment body 401, which are in fluid communication with the coolant. The coolant connectors 8 can extend through the cover plate 402 to the outside of the electrical compartment 4. By providing the coolant flow channel, the coolant can cool and dissipate heat from each battery cell 1 through the tray 2, thereby reducing the risk of thermal runaway of the battery cell 1. At the same time, the coolant connector 8 passes through the cover plate 402, so that the external coolant circulation pipeline is connected to the coolant connector 8 outside the battery pack, preventing coolant from entering the electrical compartment 4 and causing a short circuit in the battery pack in the event of leakage at the connector, thereby improving the safety of the battery pack.

[0064] In summary, the battery pack of this embodiment is provided with an exhaust channel formed by the battery cells 1, the tie bars 5, and the tray 2. When any battery cell 1 experiences thermal runaway, the gas generated by the battery cell 1 can enter the exhaust channel through the explosion-proof valve 101, so that the high-temperature and high-pressure gas generated by the battery cell 1 can be discharged to the outside of the battery pack through the exhaust channel, thereby preventing the battery pack from expanding and rupturing due to excessive pressure, thereby improving the safety of the battery pack. At the same time, the exhaust channel is formed by the battery cells 1, the tie bars 5, and the tray 2, and each battery cell 1 is fixed by the tie bars 5, the tray 2, the rear crossbeam 3, and the front crossbeam, which simplifies the shell structure of the battery pack and avoids the use of other structural components, thereby improving the compactness of the overall structure of the battery pack and having good practicality.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery pack, characterized in that: It includes a plurality of battery cells, a tray for carrying the battery cells, and a rear crossbeam and an electrical compartment respectively provided at both ends of the tray; The battery cells are arranged along the length direction of the tray and configured into two rows spaced apart in the width direction of the tray; A plurality of pull bars are provided on the top of the battery pack, and the two ends of each pull bar are respectively connected to the electrical compartment and the top of the rear crossbeam; The pull strip located at the center of the top of the battery pack can be constructed together with the battery cells and the tray to form an exhaust channel; An explosion-proof valve is provided on one side of each battery cell facing the exhaust channel, and an exhaust port connected to the exhaust channel is formed on the electrical compartment.

2. The battery pack according to claim 1, wherein: An isolation plate is attached to a side surface of each battery cell facing the exhaust channel.

3. The battery pack according to claim 1, wherein: A heat insulating pad is sandwiched between two adjacent battery cells; The thermal insulation pad is made of aerogel, and foam strips are attached to both the front and back sides of the thermal insulation pad, and the foam strips are located at both ends of the thermal insulation pad in the transverse direction.

4. The battery pack according to claim 1, wherein: Each of the pull bars is bonded to the top of each of the battery cells by structural adhesive, and both ends of each of the pull bars are connected to the rear crossbeam and the top of the electrical compartment by welding or bolting.

5. The battery pack according to claim 1, wherein: The pole of each battery cell is arranged on a side surface opposite to the explosion-proof valve, and integrated busbars are provided on both sides of the poles of the two rows of battery cells.

6. The battery pack according to claim 5, wherein: The side of each integrated busbar facing outside the battery pack is covered with foam glue.

7. The battery pack according to claim 1, wherein: The two rows of cells are electrically connected via a copper busbar; The copper busbar is placed against the outer side of the rear crossbeam, so that the rear crossbeam is sandwiched between the copper busbar and the two rows of battery cells; Or a transversely penetrating cavity is formed in the rear crossbeam, and the copper busbar is arranged in the cavity.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The electrical warehouse includes a warehouse body provided on the tray and connected to each of the pull bars, and a cover plate buckled on the warehouse body; Windows for installing exhaust and sampling interfaces are formed on both sides of the bin body, and the exhaust port is located on the bin body, and a protective cover is provided at the exhaust port; A safety valve is provided on one end of the protective cover facing the cover plate, and a window corresponding to the safety valve is formed on the cover plate.

9. The battery pack according to claim 8, wherein: The compartment is also provided with a battery management system slave board, a fuse and a high-voltage connector electrically connected to each of the battery cells; The high-voltage connector is fixed on a bracket in the compartment body, and an interface of the high-voltage connector can extend through the cover plate to the outside of the electrical compartment.

10. The battery pack according to claim 8, wherein: A coolant flow channel is integrated in the tray, and two coolant connectors in flow communication with the coolant are provided in the bin body; The coolant connector can extend through the cover plate to outside the electrical compartment.

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