Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a box body and a plurality of battery cells, and the box body comprises a plurality of side walls; the plurality of battery cells are arranged in the box body; wherein one side wall comprises a detachably connected maintenance panel and a detachably connected plug-in module, the plug-in module comprises a plurality of plug-in pieces, and the maintenance panel and the plug-in module are arranged in the length direction of the side wall. In the embodiment of the invention, one side wall of the box body is arranged to comprise the detachably connected maintenance panel and the detachably connected plugging module, and the maintenance panel and the plugging module are arranged along the length direction of the side wall, so that when maintenance is needed, only the maintenance panel is disassembled, and the plugging module is not influenced; or only the plug-in module is maintained without influencing the maintenance of the panel, so that the number of connecting pieces needing to be disassembled can be reduced, the maintenance process is simplified, the maintenance efficiency is improved, and the technical problems that the maintenance process of the battery pack is tedious and low in efficiency are solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery pack. Background Technology

[0002] In related technologies, a battery pack includes a casing and battery cells, a battery management system, etc., housed within the casing. When a battery pack malfunctions, the casing needs to be disassembled to repair or replace the components inside. Disassembling the casing requires removing multiple connectors from each side wall, and the side walls also house numerous components such as positive high-voltage connectors, negative high-voltage connectors, and communication connectors. Disassembly also requires removing these side wall components, making the battery pack maintenance process cumbersome and inefficient.

[0003] Therefore, it is urgent to solve the above-mentioned technical problems. Utility Model Content

[0004] The embodiments of this application provide a battery pack that can improve the technical problem of cumbersome and inefficient battery pack maintenance process.

[0005] This application provides a battery pack, the battery pack comprising:

[0006] The enclosure includes multiple side walls;

[0007] Multiple battery cells are housed within the enclosure;

[0008] One of the sidewalls includes a detachably connected maintenance panel and a detachably connected plug module. The plug module includes multiple plugs, and the maintenance panel and the plug module are arranged along the length of the sidewall.

[0009] In one embodiment, the length of the maintenance panel is greater than half the length of the sidewall, and the length of the plug-in module is less than half the length of the sidewall.

[0010] In one embodiment, the maintenance panel is provided with a fire sprinkler head and an explosion-proof valve, and the distance between the fire sprinkler head and the explosion-proof valve is greater than or equal to 80 mm along the length of the side wall.

[0011] In one embodiment, the fire sprinkler head and the explosion-proof valve are disposed on both sides of the centerline of the sidewall, and the centerline of the sidewall is perpendicular to the length direction of the sidewall.

[0012] In one embodiment, the distance between the center of the fire sprinkler head and the centerline of the sidewall is 40 mm to 100 mm along the length of the sidewall, and the distance between the center of the explosion-proof valve and the centerline of the sidewall is 40 mm to 200 mm.

[0013] In one embodiment, the ratio of the distance between the center of the plug-in module and the center line of the sidewall to the length of the sidewall is in the range of 1 / 3 to 1 / 2, and the center of the plug-in module and the center line of the sidewall are both perpendicular to the length direction of the sidewall.

[0014] In one embodiment, the connector includes a communication interface, a positive connector, a negative connector, and a manual maintenance switch;

[0015] The positive connector and the negative connector are arranged along a direction perpendicular to the length of the sidewall; the manual maintenance switch and the negative connector are arranged along the length of the sidewall.

[0016] In one embodiment, the plug-in module includes a bracket and a plurality of plug-in components disposed on the bracket. The plurality of plug-in components are disposed in the middle region of the bracket, and a plurality of connectors are disposed in the edge region of the bracket. The bracket is detachably connected to the side wall through the connectors.

[0017] In one embodiment, the bracket includes a bracket body and a folded edge connected to the bracket body. The folded edge is located on the side of the bracket body near the center of the housing, and the folded edge is detachably connected to the bottom wall of the housing.

[0018] In one embodiment, a battery management system module is further provided inside the housing, and the battery management system module is disposed between the battery cell and the maintenance panel.

[0019] The beneficial effects of the embodiments of this application are as follows:

[0020] In the embodiments of this application, by configuring one side wall of the housing to include a detachable maintenance panel and a detachable plug-in module, with the maintenance panel and plug-in module arranged along the length of the side wall, when maintenance is required, only the maintenance panel can be disassembled without affecting the plug-in module, or only the plug-in module can be maintained without affecting the maintenance panel. This reduces the number of connectors that need to be disassembled, simplifies the maintenance process, and improves maintenance efficiency, thereby addressing the technical problem of the cumbersome and inefficient maintenance process of the battery pack. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of a battery pack provided in an embodiment of this application;

[0023] Figure 2 yes Figure 1 The main view of the battery pack in the image;

[0024] Figure 3 yes Figure 1 An enlarged structural diagram of the plug-in module in the diagram;

[0025] Figure 4 yes Figure 3 A structural schematic diagram of the plug-in module from another perspective;

[0026] Figure 5 yes Figure 3 A three-dimensional schematic diagram of the plug-in bracket;

[0027] Figure 6 yes Figure 5 Another structural diagram of the plug-in bracket from another perspective.

[0028] Explanation of reference numerals in the attached figures:

[0029] Battery pack 1;

[0030] Box body 10, side wall 11;

[0031] Maintenance panel 111, fire sprinkler head 1111, explosion-proof valve 1112;

[0032] Plug-in module 112, plug-in piece 1121, bracket 1122, connector 1123, bracket body 11221, folded edge 11222, communication interface 1120, positive connector 1130, negative connector 1140, manual maintenance switch 1150;

[0033] Battery Management System Module 20

[0034] The centerline CL of sidewall 11;

[0035] The distance X between the center of the fire sprinkler head 1111 and the center line CL of the side wall 11;

[0036] The distance Y between the center of the explosion-proof valve 1112 and the center line CL of the side wall 11;

[0037] The distance Z between the center of the plug-in module 112 and the center line CL of the side wall 11;

[0038] The length W of sidewall 11. Detailed Implementation

[0039] The embodiments of this application are described below with reference to the accompanying drawings. The embodiments described herein with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0040] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "fixed" in this document should also be interpreted broadly. For example, "fixed" can be a direct fixation or an indirect fixation through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "up," "down," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] In the embodiments of this application, the term "multiple" refers to two or more.

[0042] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0043] It is understood that the specific embodiments described herein are merely for explaining the relevant application and not for limiting the application. It should also be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings.

[0044] This application provides a battery pack 1, such as Figures 1 to 6 As shown, the battery pack 1 includes a housing 10 and multiple battery cells (not shown in the figure). The housing 10 includes multiple side walls 11. The multiple battery cells are disposed inside the housing 10. One side wall 11 includes a detachably connected maintenance panel 111 and a detachably connected plug module 112. The plug module 112 includes multiple plugs 1121. The maintenance panel 111 and the plug module 112 are arranged along the length of the side wall 11.

[0045] like Figure 1 As shown, the housing 10 has opposing top and bottom walls, and multiple side walls 11 connect the top and bottom walls. The top wall, side walls 11, and bottom wall form a receiving cavity. The battery cell is placed inside the receiving cavity, and the housing 10 can protect the battery cell.

[0046] Optionally, the top wall and multiple side walls 11 of the enclosure 10 are integrally formed, the bottom wall of the enclosure 10 is a liquid cooling plate, and the side walls 11 are detachably connected to the bottom wall.

[0047] Optionally, the bottom wall of the housing 10 is integrally formed with multiple side walls 11, and the side walls 11 are detachably connected to the top wall.

[0048] like Figure 1 and Figure 2 As shown, one side wall 11 of the housing 10 includes a detachably connected maintenance panel 111 and a detachably connected plug-in module 112. By placing the maintenance panel 111 and the plug-in module 112 on the same side wall 11, maintenance of the battery pack 1 can be performed by disassembling only on the same side wall 11. Furthermore, when the battery pack 1 is in use, multiple battery packs 1 are stacked, with one side wall 11 facing outwards and the other side walls 11 spaced relatively close to adjacent battery packs 1. Therefore, during maintenance of the battery pack 1, it is not necessary to move the battery pack 1; only the exposed side wall 11 can be disassembled.

[0049] The maintenance panel 111 and the plug-in module 112 are arranged along the length of the side wall 11, where the length of the side wall 11 refers to the extension direction of the longer side of the side wall 11. For example... Figure 2 As shown, the side wall 11 is rectangular, with its length in the horizontal direction being greater than its length in the vertical direction; that is, the length direction of the side wall 11 is horizontal. By arranging the maintenance panel 111 and the plug-in module 112 along the length direction of the side wall 11, the layout space of the maintenance panel 111 and the plug-in module 1121 can be made more sufficient.

[0050] Optionally, such as Figure 1 As shown, the maintenance panel 111 is located on the left and the plug-in module 112 is located on the right. In some other embodiments, their positions may be interchanged; for example, the maintenance panel 111 may be located on the right and the plug-in module 112 on the left.

[0051] In this application, as Figure 1 and Figure 2 As shown, detachable connections include threaded connections, which can be made using connectors 1123. Connectors 1123 may include bolts, screws, etc.

[0052] Since the disassembly of the maintenance panel 111 and the connector module 112 do not affect each other, when it is necessary to repair the components on the maintenance panel 111 or the components inside the housing 10 in the area corresponding to the maintenance panel 111, only the maintenance panel 111 needs to be disassembled; similarly, when it is necessary to repair the components on the connector module 112 or the components inside the housing 10 in the area corresponding to the connector module 112, only the connector module 112 needs to be disassembled. This reduces the number of connectors 1123 that need to be disassembled, simplifies the maintenance process, and improves maintenance efficiency.

[0053] In one embodiment, such as Figure 2 As shown, the length of the maintenance panel 111 is greater than half the length W of the side wall 11, and the length of the plug-in module 112 is less than half the length W of the side wall 11.

[0054] It should be noted that, in this application, length refers to the dimension along the length direction of the side wall 11. The length of the maintenance panel 111 refers to the dimension of the maintenance panel 111 along the length direction of the side wall 11, the length W of the side wall 11 refers to the dimension of the side wall 11 along the length direction of the side wall 11, and the length of the plug-in module 112 refers to the dimension of the plug-in module 112 along the length direction of the side wall 11.

[0055] The length of the maintenance panel 111 is greater than half the length W of the side wall 11, so that the length of the maintenance panel 111 can be maximized. When the maintenance panel 111 is removed, the opening exposed in the side wall 11 is larger, which makes it easier to repair or replace the components inside the housing 10 behind the maintenance panel 111.

[0056] The length of the plug module 112 is less than half the length W of the side wall 11, so that the length of the plug module 112 can be reduced as much as possible, making the layout of the multiple plugs 1121 on the plug module 112 compact, facilitating plugging and improving plugging efficiency.

[0057] In one embodiment, such as Figure 2 As shown, the maintenance panel 111 is equipped with a fire sprinkler head 1111 and an explosion-proof valve 1112. The distance between the fire sprinkler head 1111 and the explosion-proof valve 1112 is greater than or equal to 80 mm along the length of the side wall 11.

[0058] When thermal runaway occurs in battery pack 1, fire sprinkler head 1111 can be activated to spray extinguishing agents, thereby eliminating and suppressing the risk of thermal runaway.

[0059] When thermal runaway occurs inside battery pack 1, the smoke emitted from the battery cells will cause an increase in air pressure inside the housing 10. When the air pressure increases beyond the opening threshold of the explosion-proof valve 1112, the explosion-proof valve 1112 will open, allowing the gas inside the housing 10 to be discharged from the explosion-proof valve 1112, thus preventing the battery pack 1 from exploding due to excessive internal pressure.

[0060] The distance between the fire sprinkler head 1111 and the explosion-proof valve 1112 along the length of the side wall 11 is greater than or equal to 80 mm, i.e. Figure 2 The distance between the fire sprinkler head 1111 and the explosion-proof valve 1112 is large enough to facilitate the functional testing of the explosion-proof valve 1112 after the battery pack 1 is manufactured. Specifically, the airtightness of the housing 10 can be tested by inflating the explosion-proof valve 1112 using a tool that allows for at least 80 mm of installation space.

[0061] In one embodiment, such as Figure 2 As shown, the fire sprinkler head 1111 and the explosion-proof valve 1112 are located on both sides of the center line CL of the side wall 11, and the center line CL of the side wall 11 is perpendicular to the length direction of the side wall 11.

[0062] The centerline CL of the side wall 11 refers to the straight line containing the axis of symmetry of the side wall 11 along its length. The left and right sides of the side wall 11 are symmetrically arranged about the centerline. The fire sprinkler head 1111 and the explosion-proof valve 1112 are respectively located on both sides of the centerline CL of the side wall 11. When the fire sprinkler head 1111 is located on the left side of the centerline CL of the side wall 11, the explosion-proof valve 1112 is located on the right side of the centerline CL of the side wall 11; when the fire sprinkler head 1111 is located on the right side of the centerline CL of the side wall 11, the explosion-proof valve 1112 is located on the left side of the centerline CL of the side wall 11.

[0063] In one embodiment, such as Figure 2 As shown, the distance X between the center of the fire sprinkler head 1111 and the center line CL of the side wall 11 in the length direction of the side wall 11 is 40 mm to 100 mm.

[0064] It should be noted that the battery management system module 20 is located inside the housing 10 near the maintenance panel 111, and the battery management system module 20 can be located near the left side of the side wall 11. The fire sprinkler head 1111 can be located to the left of the center line CL of the side wall 11. When the distance X between the center of the fire sprinkler head 1111 and the center line CL of the side wall 11 is 40 mm to 100 mm, the fire sprinkler head 1111 is located to the right of the battery management system module 20 and will not interfere with the battery management system module 20.

[0065] In one embodiment, such as Figure 2 As shown, the distance Y between the center of the explosion-proof valve 1112 and the center line CL of the side wall 11 is 40 mm to 200 mm.

[0066] In one embodiment, such as Figure 2As shown, the ratio of the distance Z between the center of the plug-in module 112 and the centerline CL of the side wall 11 to the length W of the side wall 11 ranges from 1 / 3 to 1 / 2, that is, Z ranges from W / 3 to W / 2. The center of the plug-in module 112 refers to the geometric center of the plug-in module 112.

[0067] In one embodiment, such as Figure 3 and Figure 4 As shown, the connector 1121 includes a communication interface 1120, a positive connector 1130, a negative connector 1140, and a manual maintenance switch 1150; wherein, the positive connector 1130 and the negative connector 1140 are arranged along the length direction perpendicular to the side wall 11; the manual maintenance switch 1150 and the negative connector 1140 are arranged along the length direction of the side wall 11.

[0068] The communication interface 1120 can connect to an external controller to transmit various information about the battery pack 1. For example, the communication interface 1120 can transmit information such as the voltage, current, temperature, SOC (state of charge), and SOH (state of health) of the battery pack 1 to the external controller. This data helps the external controller accurately grasp the status of the battery pack 1 and make timely adjustments and optimizations, thereby improving the lifespan and performance of the battery pack 1.

[0069] The positive connector 1130 and the negative connector 1140 are used to output the electrical energy of the battery pack 1. The positive connector 1130 is used to output the positive voltage, and the negative connector 1140 is used to output the negative voltage.

[0070] The 1150MSD (Manual Service Device) is a high-voltage connector with a fuse, primarily used for the maintenance of battery pack 1. In maintenance situations, the 1150 can quickly disconnect high-voltage current, providing a safe and reliable guarantee for the maintenance of battery pack 1, while also serving as short-circuit protection.

[0071] Optionally, such as Figures 2 to 4 As shown, the positive connector 1130 and the negative connector 1140 are located at the rightmost end of the side wall 11, with the positive connector 1130 positioned above the negative connector 1140. That is, the positive connector 1130 and the negative connector 1140 can be arranged along a direction perpendicular to the length of the side wall 11. The manual maintenance switch 1150 is located to the left of the negative connector 1140, and the communication interface 1120 is located above the manual maintenance switch 1150.

[0072] By placing the manual maintenance switch 1150 and the negative connector 1140 on the same horizontal plane, the high-voltage copper busbar inside the housing 10 can be connected to the manual maintenance switch 1150 and the negative connector 1140 respectively along the length of the side wall 11.

[0073] Optionally, such as Figure 2 , Figure 3 and Figure 4 As shown, the communication interface 1120 and the manual maintenance switch 1150 can be located at the rightmost end of the side wall 11, the negative connector 1140 is located to the left of the manual maintenance switch 1150, and the positive connector 1130 is located above the negative connector 1140. The positive connector 1130 and the negative connector 1140 can be arranged along a direction perpendicular to the length of the side wall 11.

[0074] The above configuration allows for a compact layout of the communication interface 1120, positive connector 1130, negative connector 1140, and manual maintenance switch 1150, reducing the space occupied by the connector 1121.

[0075] In one embodiment, such as Figure 3 and Figure 4 As shown, the plug-in module 112 includes a bracket 1122 and a plurality of plug-in components 1121 disposed on the bracket 1122. The plurality of plug-in components 1121 are disposed in the middle region of the bracket 1122, and a plurality of connectors 1123 are disposed in the edge region of the bracket 1122. The bracket 1122 is detachably connected to the side wall 11 through the connectors 1123.

[0076] The edge region of the bracket 1122 is located outside the middle region of the bracket 1122. The connector 1121 may be located in the middle region of the bracket 1122.

[0077] Optionally, such as Figure 3 and Figure 4 As shown, a boss is provided in the middle area, protruding towards the side away from the center of the housing 10, meaning the middle area of ​​the bracket 1122 can protrude beyond the edge area of ​​the bracket 1122. This design increases the distance between the connector 1121 and the components inside the housing 10, thus increasing the installation space for the connector 1121. Simultaneously, the boss increases the mechanical strength of the bracket 1122.

[0078] A connector 1123 is provided on the edge area of ​​the bracket 1122, and the bracket 1122 is detachably connected to the side wall 11 through the connector 1123. The connector 1123 can be a bolt, screw, etc., but is not limited to these.

[0079] In one embodiment, such as Figure 5 and Figure 6 As shown, the bracket 1122 includes a bracket body 11221 and a flange 11222 connected to the bracket body 11221. The flange 11222 is located on the side of the bracket body 11221 near the center of the box 10. The flange 11222 is detachably connected to the bottom wall of the box 10.

[0080] The bracket 1122 can be a sheet metal part. The folded edge 11222 is folded towards the center of the housing 10 relative to the bracket body 11221. A through hole can be provided on the folded edge 11222, through which the connector 1123 passes, enabling a detachable connection between the folded edge 11222 and the bottom wall of the housing 10. By providing the folded edge 11222, the connection reliability between the bracket 1122 and the housing 10 can be further improved.

[0081] In one embodiment, such as Figure 2 As shown, a battery management system module 20 is also installed inside the housing 10, and the battery management system module 20 is located between the battery cell and the maintenance panel 111.

[0082] The battery management system module 20 can collect parameters such as battery voltage, temperature, and current. These parameters are not only used to prevent overcharging or over-discharging of the battery, but also to identify and replace faulty batteries in a timely manner, ensuring the efficient and reliable operation of the entire battery pack.

[0083] The battery management system module 20 can be located between the battery cell and the service panel 111. This means that the battery management system module 20 is located close to the service panel 111. After the service panel 111 is removed, the battery management system module 20 can be repaired.

[0084] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery pack (1), characterized in that, include: The enclosure (10) includes multiple side walls (11); Multiple battery cells are disposed inside the housing (10); One of the sidewalls (11) includes a detachably connected maintenance panel (111) and a detachably connected plug module (112). The plug module (112) includes a plurality of plugs (1121). The maintenance panel (111) and the plug module (112) are arranged along the length direction of the sidewall (11).

2. The battery pack (1) according to claim 1, characterized in that, The length of the maintenance panel (111) is greater than half the length of the side wall (11), and the length of the plug-in module (112) is less than half the length of the side wall (11).

3. The battery pack (1) according to claim 2, characterized in that, The maintenance panel (111) is equipped with a fire sprinkler head (1111) and an explosion-proof valve (1112). The distance between the fire sprinkler head (1111) and the explosion-proof valve (1112) is greater than or equal to 80 mm along the length of the side wall (11).

4. The battery pack (1) according to claim 3, characterized in that, The fire sprinkler head (1111) and the explosion-proof valve (1112) are located on both sides of the center line of the side wall (11), and the center line of the side wall (11) is perpendicular to the length direction of the side wall (11).

5. The battery pack (1) according to claim 4, characterized in that, Along the length of the sidewall (11), the distance between the center of the fire sprinkler head (1111) and the center line of the sidewall (11) is 40 mm to 100 mm, and the distance between the center of the explosion-proof valve (1112) and the center line of the sidewall (11) is 40 mm to 200 mm.

6. The battery pack (1) according to claim 2, characterized in that, The ratio of the distance between the center of the plug-in module (112) and the center line of the side wall (11) to the length of the side wall (11) is between 1 / 3 and 1 / 2. The center line of the plug-in module (112) and the center line of the side wall (11) are both perpendicular to the length direction of the side wall (11).

7. The battery pack (1) according to claim 6, characterized in that, The connector (1121) includes a communication interface (1120), a positive connector (1130), a negative connector (1140), and a manual maintenance switch (1150); The positive connector (1130) and the negative connector (1140) are arranged along a direction perpendicular to the length of the sidewall (11); the manual maintenance switch (1150) and the negative connector (1140) are arranged along the length of the sidewall (11).

8. The battery pack (1) according to any one of claims 1 to 7, characterized in that, The plug-in module (112) includes a bracket (1122) and a plurality of plug-in components (1121) disposed on the bracket (1122). The plurality of plug-in components (1121) are disposed in the middle region of the bracket (1122), and a plurality of connectors (1123) are disposed in the edge region of the bracket (1122). The bracket (1122) is detachably connected to the side wall (11) through the connectors (1123).

9. The battery pack (1) according to claim 8, characterized in that, The bracket (1122) includes a bracket body (11221) and a flange (11222) connected to the bracket body (11221). The flange (11222) is located on one side of the bracket body (11221) near the center of the box (10). The flange (11222) is detachably connected to the bottom wall of the box (10).

10. The battery pack (1) according to any one of claims 1 to 7, characterized in that, The housing (10) is also equipped with a battery management system module (20), which is located between the battery cell and the maintenance panel (111).

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