Battery pack

Abstract

The utility model relates to the technical field of batteries, and particularly provides a battery pack. The utility model aims to solve the problem that a maintenance area covered by a mounting window is relatively limited and the actual maintenance requirement is difficult to meet in the prior art. Therefore, the utility model provides a battery pack, which is characterized in that the battery pack comprises an upper cover comprising a front panel and an upper panel which are vertically connected, the front panel is provided with an installation maintenance window, and the upper panel is provided with a maintenance window; the maintenance cover plate is detachably arranged on the maintenance window; and the slave control panel is detachably arranged on the installation and maintenance window. According to the battery pack provided by the invention, the maintenance requirements of most parts of the front panel can be met under the condition that the upper cover is not disassembled, the maintenance difficulty caused by the single and too small maintenance window of the battery pack is reduced, and the maintenance efficiency and convenience of the battery pack are improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack. Background Art

[0002] The battery pack is the key to modern energy storage technology. It can store and provide electric energy and is widely used in fields such as electric vehicles, energy storage systems, and electronic devices. After the battery pack is put into use, on-site maintenance is inevitable.

[0003] In the related art, an installation window is provided on the upper cover of the battery pack, and the slave control panel is installed in the installation window in a detachable manner. The related art exposes the installation window by disassembling the slave control panel to repair the battery pack. However, the maintenance area covered by the installation window is relatively limited. Through the installation window, only the battery management unit integrated in the slave control panel can be simply replaced, and it is difficult to repair components such as the high-voltage connector panel, the connecting module copper bar, and the fuse. Even the upper cover needs to be removed to perform effective maintenance, which greatly reduces the efficiency and convenience of battery pack maintenance and is difficult to meet the actual maintenance requirements.

[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problem that the maintenance area covered by the installation window in the related art is relatively limited and it is difficult to meet the actual maintenance requirements.

[0006] The present application provides a battery pack, which includes: an upper cover including a front panel and an upper panel vertically connected, the front panel is provided with an installation and maintenance window, and the upper panel is configured with a maintenance window; a maintenance cover plate detachably provided in the maintenance window; and a slave control panel detachably provided in the installation and maintenance window.

[0007] In some embodiments, the bottom of the upper cover is open, and the battery pack further includes: a lower box body capable of being connected to the bottom of the upper cover and enclosing an installation cavity with the upper cover; a plurality of modules, when the upper cover is installed on the lower box body, the modules are located in the installation cavity, and a plurality of cell explosion-proof valves are arranged along the extending direction of the modules; wherein, the upper panel further includes a venting channel and a waterproof breathable explosion-proof valve, the waterproof breathable explosion-proof valve is communicated with the outside of the battery pack, and the cell explosion-proof valve is communicated with the waterproof breathable explosion-proof valve through the corresponding venting channel.

[0008] In some embodiments, each module includes a plurality of cells, and each cell is provided with the cell explosion-proof valve.

[0009] In some embodiments, the air release channel includes an air release branch channel and a summary channel. The air release branch channels are respectively disposed on the upper side of the module, and the explosion-proof valve of the battery cell is communicated with the summary channel through the corresponding air release branch channel, and the summary channel is communicated with the waterproof breathable explosion-proof valve.

[0010] In some embodiments, the air release branch channel includes a first branch channel and a second branch channel. The first branch channel is disposed on the upper panel, and the second branch channel and the summary channel are disposed on the maintenance cover plate. Wherein, when the maintenance cover plate is installed on the upper panel, the first branch channel and the second branch channel are correspondingly communicated, and the second branch channel is communicated with the summary channel.

[0011] In some embodiments, the first branch channel and the second branch channel extend along a first direction, the summary channel extends along a second direction, and the first direction is perpendicular to the front panel and perpendicular to the second direction.

[0012] In some embodiments, a seal is provided at the connection of the first branch channel and the second branch channel.

[0013] In some embodiments, the summary channel is provided with a mounting hole, and the waterproof breathable explosion-proof valve is disposed in the mounting hole.

[0014] In some embodiments, the air release channel bulges toward the side away from the installation cavity, and the side of the air release channel close to the installation cavity is open.

[0015] In some embodiments, the upper panel is configured with a first maintenance window, and the first maintenance window is disposed on the side of the upper panel close to the front panel; and / or, the maintenance window includes a second maintenance window, the battery pack has an electrical connection area, and the second maintenance window is correspondingly disposed above the electrical connection area, wherein the electrical connection area includes one or more of a total positive electrode, a total negative electrode, a module positive electrode, a module negative electrode, and a series copper bar; and / or, the maintenance cover plate is installed on the maintenance window by bolt connection; and / or, the front panel is further provided with a high-voltage panel installation opening, and the battery pack further includes a high-voltage panel disposed in the high-voltage panel installation opening.

[0016] On the premise of adopting the above technical solution, a maintenance window is opened on the upper panel of the upper cover of the battery pack of the present application, and an installation and maintenance window is opened on the front panel. The slave control panel is detachably arranged in the installation and maintenance window. When the battery pack needs to be maintained, the slave control panel is removed to expose the installation and maintenance window. Through the cooperation of the maintenance window and the installation and maintenance window, the area of the covered maintenance area can be enlarged. With such a setting, it is possible to meet the maintenance requirements of most of the components on the front panel without removing the upper cover, reduce the maintenance difficulty caused by the single and small maintenance window of the battery pack, and improve the efficiency and convenience of battery pack maintenance. Description of the Drawings

[0017] The following describes the preferred embodiments of the present application in conjunction with the drawings, in which:

[0018] Figure 1 is a schematic structural diagram of the upper cover of the battery pack in the present application;

[0019] Figure 2 is a front view of the upper cover in the present application;

[0020] Figure 3 is a top view of the upper cover in the present application;

[0021] Figure 4 is a schematic structural diagram of the battery pack in the present application;

[0022] Figure 5 is a top view of the battery pack in the present application;

[0023] Figure 6 is a front view of the battery pack in the present application;

[0024] Figure 7 is a schematic structural diagram of the maintenance cover plate in the present application;

[0025] Figure 8 is a schematic diagram of the air leakage direction of the battery pack in the present application;

[0026] Figure 9 is another schematic structural diagram of the battery pack in the present application.

[0027] Reference Signs:

[0028] 100, Upper cover; 101, Front panel; 1011, Installation and maintenance window; 1012, High-voltage panel installation opening; 102, Upper panel; 1021, Maintenance window; 10211, First maintenance window; 10212, Second maintenance window; 1022, Waterproof, breathable and explosion-proof valve; 1023, Air release channel; 10231, Air release branch channel; 10232, Aggregation channel; 10233, First branch channel; 10234, Second branch channel; 10235, Installation hole; 200, Maintenance cover plate; 300, Slave control panel; 400, High-voltage panel; 500, Module; 501, Cell explosion-proof valve; 502, Cell; 503, Positive electrode of module; 504, Negative electrode of module; 600, Bolt; 700, Lower box body. Detailed implementation manners

[0029] The following describes the preferred implementation manners of the present application with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios. Such changes in the application scenarios do not deviate from the basic principle of the present application and belong to the protection scope of the present application.

[0030] In the embodiments of the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present application and their embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0031] It should be noted that in the description of this preferred implementation manner, unless otherwise clearly specified and limited, the terms "connected" and "communicated" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, and it can also be the connection inside two elements. These cannot be understood as limitations to the present application. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] The battery pack is the key to modern energy storage technology. It can store and provide electrical energy and is widely used in fields such as electric vehicles, energy storage systems, and electronic devices. After the battery pack is put into use, on-site maintenance is inevitable.

[0033] In related technologies, an installation window is provided on the upper cover of the battery pack, and the slave control panel is installed in the installation window in a detachable manner. In related technologies, the installation window is exposed by removing the slave control panel to perform maintenance on the battery pack. The slave control panel is connected to various structures through wire harnesses, and there is a relatively large movable space, so the slave control panel can be removed, and the installation window corresponding to the slave control panel can be used to perform maintenance on the battery pack. The high-voltage panel is connected to the high-voltage copper bar, and the movable space is relatively small, and the disassembly difficulty is relatively large. The slave control panel will integrate the BMU module, and the high-voltage panel will integrate electrical components such as positive and negative connectors, fire-fighting connectors, and MSD.

[0034] However, the maintenance area covered by the installation window is relatively limited. Through the installation window, only the battery management unit integrated in the slave control panel can be simply replaced, and it is relatively difficult to repair components such as the high-voltage connector panel, connecting module copper bar, and fuse. Even the upper cover needs to be removed to perform effective maintenance, which greatly reduces the efficiency and convenience of battery pack maintenance and is difficult to meet the actual maintenance needs.

[0035] In order to solve the problem that the maintenance area covered by the installation window in related technologies is relatively limited and it is difficult to meet the actual maintenance needs, the present application provides a battery pack.

[0036] Combined with Figure 1 、 Figure 5 and Figure 6 shown, the battery pack provided by the present application includes an upper cover 100, a maintenance cover plate 200, and a slave control panel 300.

[0037] Combined with Figure 1 and Figure 2 shown, the upper cover 100 includes a front panel 101 and an upper panel 102 that are vertically connected. The front panel 101 is provided with an installation and maintenance window 1011, and the upper panel 102 is configured with a maintenance window 1021.

[0038] Combined with Figure 3 and Figure 5 shown, the maintenance cover plate 200 is detachably arranged in the maintenance window 1021.

[0039] Combined with Figure 6 shown, the slave control panel 300 is detachably arranged in the installation and maintenance window 1011.

[0040] On the premise of adopting the above technical solution, a maintenance window 1021 is opened on the upper panel 102 of the battery pack of the present application, and an installation and maintenance window 1011 is opened on the front panel 101. The slave control panel 300 is detachably arranged in the installation and maintenance window 1011. When the battery pack needs to be maintained, the slave control panel 300 is removed to expose the installation and maintenance window 1011. Through the cooperation of the maintenance window 1021 and the installation and maintenance window 1011, the area of the covered maintenance area can be enlarged, and the maintenance of components such as the BMU (Battery Management Unit), module total-level connection copper bar, fuse, and high-voltage panel inside the battery pack can be realized. With such a setting, the maintenance requirements of most components on the front panel 101 can be met without removing the upper cover 100, the maintenance difficulty caused by the single and too small maintenance window 1021 of the battery pack is reduced, and the efficiency and convenience of battery pack maintenance are improved.

[0041] Among them, the upper cover 100 is Figure 1 the structure shown, and the upper cover 100 is surrounded by five plate bodies, and the bottom of the upper cover 100 is open.

[0042] In some embodiments, as shown in combination with Figure 4 and Figure 6 , the battery pack further includes a lower box body 700 and a plurality of modules 500. The lower box body 700 can be connected to the bottom of the upper cover 100 and enclose an installation cavity with the upper cover 100. When the upper cover 100 is installed on the lower box body 700, the modules 500 are arranged in the installation cavity, and a plurality of cell explosion-proof valves 501 are arranged along the extending direction of the modules 500. Among them, as shown in combination with Figure 5 and Figure 4 , the upper panel 102 further includes a venting channel 1023 and a waterproof and breathable explosion-proof valve 1022. The waterproof and breathable explosion-proof valve 1022 is communicated with the outside of the battery pack, and the cell explosion-proof valve 501 is communicated with the waterproof and breathable explosion-proof valve 1022 through the corresponding venting channel 1023. With such a setting, when a thermal runaway occurs in the cells 502 in the module 500 of the battery pack, the high-temperature gas generated by the thermal runaway enters the corresponding venting channel 1023 through the cell explosion-proof valve 501, and then is discharged from the battery pack through the waterproof and breathable explosion-proof valve 1022 communicated with the venting channel 1023.

[0043] As shown in combination with Figure 6 , the lower box body 700 is composed of a single board, and the lower box body 700 is used to fixedly install structures such as the module 500. After the module 500 is fixed to the lower box body 700, the upper cover 100 is sleeved and fixed on the lower box body 700.

[0044] In addition, in the related art, the installation position of the waterproof, breathable and explosion-proof valve is at the front panel of the battery pack housing. Since there are a high-voltage panel and a slave control panel at the front panel, there are many high-voltage copper bars and low-voltage wire harnesses at the front panel. Therefore, in the related art during the thermal runaway process, high-temperature gas is more likely to cause electrical insulation failure with the low-voltage wire harness, triggering a short-circuit risk and even causing the battery pack to catch fire. In this embodiment, both the waterproof, breathable and explosion-proof valve 1022 and the air release channel 1023 are provided on the upper panel 102. The high-temperature gas generated by thermal runaway is vented through the air release channel 1023 of the upper panel 102 and the waterproof, breathable and explosion-proof valve 1022, and can be separated from the high-voltage area where the high-voltage panel is located and the low-voltage area where the slave control panel is located, thereby achieving thermal-electric separation. In this way, the probability of electrical insulation failure of the low-voltage wire harness caused by high temperature can be reduced, and the risk of internal short circuit of the battery pack can be lowered.

[0045] In some embodiments, as shown in Figure 4 Each module 500 includes a plurality of battery cells 502, and each battery cell 502 is provided with a battery cell explosion-proof valve 501. The battery cell explosion-proof valve 501 is a safety device on the battery cell 502, and its main function is to automatically open when the internal pressure of the battery cell 502 abnormally rises, so as to release the pressure and prevent the battery cell 502 from exploding. During the charging and discharging process of the battery cell 502, due to chemical reactions, overcharging, over-discharging, external short circuits, etc., excessive heat or gas may be generated, resulting in an increase in internal pressure. The existence of the battery cell explosion-proof valve 501 is to provide a safe release channel in this situation to ensure the safe operation of the battery cell 502.

[0046] The battery cell 502 is the smallest unit of the power battery and also the electrical energy storage unit. The battery cell 502 has a high energy density to store as much electrical energy as possible, so that the electrical equipment (such as an electric vehicle) has a longer cruising range. When a plurality of battery cells 502 are encapsulated together by the same outer shell frame and are connected to the outside through a unified boundary, this forms a module 500. And when several modules 500 are jointly controlled or managed by the BMS (i.e., Battery Management System) and the thermal management system, this unified whole is called a battery pack.

[0047] In some embodiments, as shown in Figure 4As shown, the air release channel 1023 includes an air release branch channel 10231 and a summary channel 10232. The air release branch channels 10231 are correspondingly arranged on the upper side of the module 500. The cell explosion-proof valve 501 is communicated with the summary channel 10232 through the corresponding air release branch channel 10231, and the summary channel 10232 is communicated with the waterproof and breathable explosion-proof valve 1022. When the cells 502 of multiple modules 500 undergo thermal runaway, the high-temperature gas generated by the thermal runaway can be aggregated to the summary channel 10232 through the corresponding air release branch channels 10231, and then discharged from the battery pack through the waterproof and breathable explosion-proof valve 1022 communicated with the summary channel 10232. With such an arrangement, it can be ensured that a large amount of high-temperature gas generated during the thermal runaway of the battery pack is quickly discharged, and thermal-electric separation is achieved.

[0048] In some embodiments, in combination with Figure 8 As shown, the air release branch channel 10231 includes a first branch channel 10233 and a second branch channel 10234. The first branch channel 10233 is arranged on the upper panel 102, and the second branch channel 10234 and the summary channel 10232 are arranged on the maintenance cover plate 200. Among them, when the maintenance cover plate 200 is installed on the upper panel 102, the first branch channel 10233 and the second branch channel 10234 are correspondingly communicated, and the second branch channel 10234 is communicated with the summary channel 10232. That is to say, a part of the air release branch channel 10231 is located on the maintenance cover plate 200, and the other part is located on the upper panel 102. With such an arrangement, it can not only meet the requirement that the maintenance cover plate 200 is detachably arranged at the maintenance window 1021, but also cover all the cell explosion-proof valves 501. At the same time, during the process of cell thermal runaway, the high-temperature gas is discharged by spraying the valve from the cell explosion-proof valve 501 of the cell 502. The high-temperature gas generated by the spraying valve is introduced into the summary channel 10232 of the maintenance cover plate 200 through the air release branch channel 10231 of the upper cover 100, and then discharged to the waterproof and breathable explosion-proof valve 1022, so as to achieve the explosion relief design. The operable space on the side where the maintenance cover plate 200 is located is relatively large. By arranging the summary channel 10232 on the maintenance cover plate 200, it is beneficial to further achieve thermal-electric separation.

[0049] In some embodiments, in combination with Figure 8 As shown, the first branch channel 10233 and the second branch channel 10234 extend along a first direction, and the summary channel 10232 extends along a second direction. The first direction is perpendicular to the front panel 101 and the first direction is perpendicular to the second direction. In this way, it is convenient to regularly arrange the first branch channel 10233 and the second branch channel 10234.

[0050] In some embodiments, a seal (not shown in the figure) is provided at the connection of the first branch channel 10233 and the second branch channel 10234. By providing the seal, the airtightness of the connection between the first branch channel 10233 and the second branch channel 10234 can be ensured, preventing gas from leaking from the connection.

[0051] Optionally, the seal includes a gasket. With this arrangement, both the sealing performance can be ensured and it is convenient for disassembly.

[0052] In some embodiments, in combination Figure 7 as shown, the summary channel 10232 is provided with a mounting hole 10235, and the waterproof, breathable and explosion-proof valve 1022 is disposed in the mounting hole 10235. The waterproof, breathable and explosion-proof valve 1022 is communicated with the internal space of the summary channel 10232 through the mounting hole 10235.

[0053] In some embodiments, the air release channel 1023 protrudes toward the side away from the installation cavity, and the side of the air release channel 1023 close to the installation cavity is open. By providing the air release channel 1023, the path of air release can be guided, improving the air release effect. At the same time, the air release channel 1023 protruding toward the side away from the installation cavity can be away from the battery cell 502, expanding the area of the air release channel 1023.

[0054] In some embodiments, the maintenance cover plate 200 is installed at the maintenance window 1021 by bolt connection. By bolt connection, it is convenient to disassemble the maintenance cover plate 200. For example, the maintenance cover plate 200 is provided with a round hole (not shown in the figure), and the upper panel 102 is provided with a press riveting nut (not shown in the figure). The bolt 600 passes through the round hole and is screwed into the press riveting nut, thereby realizing the connection between the maintenance cover plate 200 and the upper panel 102.

[0055] Optionally, the front panel 101 is further provided with a high-voltage panel mounting opening 1012, and the battery pack further includes a high-voltage panel 400. In combination Figure 6 as shown, the high-voltage panel 400 is disposed in the high-voltage panel mounting opening 1012. Through the cooperation of the maintenance window 1021 and the installation and maintenance window 1011, the maintenance of the high-voltage panel 400 can be realized.

[0056] Optionally, the upper panel 102 is configured with a first maintenance window 10211. In combination Figure 1 as shown, the first maintenance window 10211 is disposed on the side of the upper panel 102 close to the front panel 101. The front panel is provided with a high-voltage panel 400 and a slave control panel 300. By providing the first maintenance window on the side of the upper panel 102 close to the front panel 101, it is convenient to cooperate with the installation and maintenance window 1011 to realize the maintenance of components such as the high-voltage panel.

[0057] Optionally, in combination Figure 9As shown, the upper panel 102 is configured with a second maintenance window 10212. The battery pack has an electrical connection area, and the second maintenance window 10212 is correspondingly arranged above the electrical connection area. Among them, the electrical connection area includes one or more of the total positive electrode, the total negative electrode, the module positive electrode 603, the module negative electrode 504, and the series copper busbar. By opening the second maintenance window 10212 at a position corresponding to the electrical connection area, it is convenient to repair the electrical connection area.

[0058] The following takes the attached drawings as an example to illustrate the structure of the battery pack:

[0059] Combined with Figure 4 As shown, a first module, a second module, a third module, and a fourth module are arranged inside the battery pack. The first module, the second module, the third module, and the fourth module all extend along the first direction and are arranged in sequence along the second direction. A venting branch channel 10231 is correspondingly arranged above each module 500. Each module 500 includes a plurality of battery cells 502, and a battery cell explosion-proof valve 501 is arranged in the middle of the top of a single battery cell 502. Four venting branch channels 10231 are respectively communicated with a summary channel 10232. Two waterproof, breathable, and explosion-proof valves 1022 are arranged on the summary channel 10232. During the thermal runaway process of the battery cells, high-temperature gas sprays and vents from the battery cell explosion-proof valve 501 of the battery cell 502. The high-temperature gas generated by the spray and vent is introduced into the summary channel 10232 of the maintenance cover plate 200 of the upper panel 102 through the corresponding venting branch channel 10231, and then the gas is vented to the outside of the battery pack through the two waterproof, breathable, and explosion-proof valves 1022, achieving the explosion venting design.

[0060] So far, the technical solution of the present application has been described with reference to the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims

1. A battery pack, characterized in that, The battery pack comprises: The upper cover comprises a front panel and an upper panel connected to each other, wherein the front panel is provided with an installation and maintenance window, and the upper panel is provided with a maintenance window; A maintenance cover plate, detachably disposed on the maintenance window; and A control panel is detachably arranged on the installation and maintenance window.

2. The battery pack according to claim 1, wherein The bottom of the upper cover is open. The battery pack further comprises: The lower box body can be connected to the bottom of the upper cover and enclosed with the upper cover to define a mounting cavity; A plurality of modules are provided, wherein when the upper cover is installed on the lower box body, the modules are located in the installation cavity.

3. The battery pack according to claim 2, wherein, Along the extension direction of the module, the module is provided with a plurality of battery cell explosion-proof valves; wherein the upper panel further comprises an air leakage channel and a waterproof and breathable explosion-proof valve, the waterproof and breathable explosion-proof valve is connected to the outside of the battery pack, and the battery cell explosion-proof valve is connected to the waterproof and breathable explosion-proof valve via the corresponding air leakage channel.

4. The battery pack according to claim 3, characterized in that, Each module includes a plurality of battery cells, and each of the battery cells is provided with the battery cell explosion-proof valve.

5. The battery pack according to claim 3, characterized in that, The air leakage channel includes an air leakage branch channel and a collection channel. The air leakage branch channels are arranged one by one on the upper side of the module. The battery cell explosion-proof valve is connected to the collection channel through the corresponding air leakage branch channel. The collection channel is connected to the waterproof and breathable explosion-proof valve.

6. The battery pack according to claim 5, characterized in that, The air leakage branch channel includes a first branch channel and a second branch channel, the first branch channel is arranged on the upper panel, and the second branch channel and the aggregation channel are arranged on the maintenance cover; wherein, when the maintenance cover is installed to the upper panel, the first branch channel and the second branch channel are correspondingly connected, and the second branch channel is connected to the aggregation channel.

7. The battery pack according to claim 6, characterized in that: The first branch channel and the second branch channel extend along a first direction, and the aggregation channel extends along a second direction, wherein the first direction is perpendicular to the front panel and perpendicular to the second direction; and / or, A sealing member is provided at the connection between the first branch channel and the second branch channel.

8. The battery pack according to any one of claims 5 to 7, characterized in that, The collecting channel is provided with a mounting hole, and the waterproof, breathable and explosion-proof valve is arranged in the mounting hole.

9. The battery pack according to any one of claims 3 to 7, characterized in that, The air leakage channel protrudes toward a side away from the installation cavity, and the air leakage channel is open at a side close to the installation cavity.

10. The battery pack according to any one of claims 1 to 7, characterized in that: The maintenance window comprises a first maintenance window, and the first maintenance window is arranged on a side of the upper panel close to the front panel; and / or, The maintenance window includes a second maintenance window, the battery pack has an electrical connection area, and the second maintenance window is correspondingly arranged above the electrical connection area, wherein the electrical connection area includes one or more of a total positive electrode, a total negative electrode, a module positive electrode, a module negative electrode, and a series copper busbar; and / or, The maintenance cover is mounted on the maintenance window by bolt connection; and / or, The front panel is also provided with a high-voltage panel installation opening, and the battery pack also includes a high-voltage panel arranged at the high-voltage panel installation opening.

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