Support assembly, battery module and battery pack

Abstract

The invention provides a bracket assembly, a battery module and a battery pack. According to the support assembly, the plastic uptake support and the plastic support are combined, the first support of the plastic uptake support is arranged on the side edge face of the battery pack, the second support of the plastic uptake support is arranged at the first electrode end of the battery pack, and at least part of the plastic support is arranged at the second electrode end of the battery pack. Therefore, the plastic uptake bracket can be used for bearing the acquisition wire harness and part of busbars in the battery module, so that the use of the plastic bracket is reduced, and the production cost and weight of the bracket assembly are reduced; and meanwhile, the plastic bracket is arranged at the second electrode end of the battery pack, so that the plastic bracket with relatively high structural strength can be used for bearing the output electrode busbar of the battery module, and stable connection between the battery module and an external structure is ensured.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a bracket assembly, a battery module and a battery pack. Background Art

[0002] In the related art, the CCS component of the low-voltage power battery module is mainly an integrally formed plastic bracket or a blister bracket used to support the bus and the collection harness. However, for plastic brackets, injection molding is generally required, which has a relatively high production cost and a relatively large weight, which will lead to a decrease in the energy density of the battery module. Although the use of blister brackets can effectively reduce costs and is relatively light in weight, the structural strength of the blister bracket itself is low, which will lead to poor overall structural stability of the battery module. Summary of the invention

[0003] The embodiments of the present application provide a bracket assembly, a battery module and a battery pack, which can solve the technical problem that the bracket assembly cannot ensure sufficient structural strength while reducing costs.

[0004] In a first aspect, an embodiment of the present application provides a bracket assembly for a battery module, wherein the battery module includes a battery pack, and the bracket assembly includes:

[0005] The blister bracket comprises a first bracket and a second bracket connected to each other, wherein the first bracket is used to be arranged on a side surface of the battery pack, and the second bracket is used to be arranged on a first electrode end of the battery pack;

[0006] A plastic bracket is connected to the blister bracket, and the plastic bracket is used to be at least partially disposed on the second electrode terminal of the battery pack.

[0007] In one embodiment, a first mounting groove is provided on a side of the first bracket facing the battery pack, and the first mounting groove is used to install a first temperature sensor.

[0008] In one embodiment, a first through hole is formed on the plastic bracket, and the first through hole penetrates the plastic bracket along the thickness direction of the plastic bracket, and the first through hole is used for allowing a collection harness of the first temperature sensor to pass through.

[0009] In one embodiment, the plastic bracket includes a first main body portion and a first adapter portion that are connected to each other, the first main body portion is used to be arranged on the second electrode end of the battery pack, the first adapter portion is used to be arranged on the side surface of the battery pack, and the first adapter portion is connected to the first bracket.

[0010] In one embodiment, a wire groove is provided on the first connection section. On the side of the first main body facing the battery pack, a mounting portion protrudes. The mounting portion is provided with a second mounting groove for mounting a second temperature sensor.

[0011] In one embodiment, a second through hole is formed in the first main body. The second through hole penetrates the first main body along the thickness direction of the first main body for the acquisition wire harness of the second temperature sensor to pass through.

[0012] In one embodiment, the first bracket includes a second main body and a second adapter portion connected to each other. The second main body is connected to the second bracket, and the second adapter portion is connected to the first adapter portion. The second main body is used to arrange the adapter of the battery module.

[0013] In one embodiment, the second main body is recessed toward the battery pack relative to the second adapter portion.

[0014] In one embodiment, a third mounting groove is provided on the side of the second main body facing away from the battery pack for arranging the adapter.

[0015] In one embodiment, a third through hole is formed in the second main body. The third through hole penetrates the second main body along the thickness direction of the second main body for the acquisition wire harness to pass through and be connected to the adapter.

[0016] In one embodiment, a fourth through hole is formed in the first main body. The fourth through hole penetrates the first main body along the thickness direction of the first main body. The third through hole and the fourth through hole are for the acquisition wire harness to pass through in sequence and be connected to the adapter.

[0017] In one embodiment, a fourth mounting groove is provided on the side of the second bracket facing away from the battery pack for arranging the acquisition wire harness.

[0018] In one embodiment, the thickness of the plastic bracket is greater than or equal to 1 mm and less than or equal to 2 mm.

[0019] In one embodiment, the thickness of the plastic suction bracket is greater than or equal to 0.5 mm and less than or equal to 0.8 mm.

[0020] In a second aspect, an embodiment of the present application provides a battery module including the bracket assembly described in any one of the above.

[0021] In a third aspect, an embodiment of the present application provides a battery pack including the above battery module.

[0022] Advantages of the embodiments of the present application:

[0023] In the embodiments of the present application, by combining a plastic suction bracket with a plastic bracket, arranging the first bracket of the plastic suction bracket on the side surface of the battery pack, arranging the second bracket of the plastic suction bracket on the first electrode end of the battery pack, and arranging at least part of the plastic bracket on the second electrode end of the battery pack, it is possible to use the plastic suction bracket to carry the acquisition wire harness and part of the bus bar in the battery module, so as to reduce the use of the plastic bracket and lower the production cost and weight of the bracket assembly; at the same time, arranging the plastic bracket on the second electrode end of the battery pack enables the use of the plastic bracket with higher structural strength to carry the output pole bus bar of the battery module, thereby ensuring the stable connection between the battery module and the external structure. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is an exploded structural schematic diagram of a bracket assembly provided by an embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of a bracket assembly provided by an embodiment of the present application from a first perspective;

[0027] Figure 3 is provided by an embodiment of the present application Figure 2 is an enlarged structural schematic diagram of area A therein;

[0028] Figure 4 is a structural schematic diagram of a bracket assembly provided by an embodiment of the present application from a second perspective;

[0029] Figure 5 is provided by an embodiment of the present application Figure 4 is an enlarged structural schematic diagram of area B therein;

[0030] Figure 6 is provided by an embodiment of the present application Figure 4 is an enlarged structural schematic diagram of area C therein;

[0031] Figure 7 is a structural schematic diagram of a battery module provided by an embodiment of the present application.

[0032] Description of the Reference Numerals:

[0033] 1. Battery module;

[0034] 10. Bracket assembly; 11. Blister bracket; 111. First bracket; 1111. First mounting groove; 1112. Second main body part; 1113. Second adapter part; 1114. Third mounting groove; 1115. Third through hole; 1116. First connection hole; 112. Second bracket; 1121. Fourth mounting groove; 1122. Second connection column; 12. Plastic bracket; 121. First main body part; 1211. First through hole; 1212. Second through hole; 1213. Fourth through hole; 1214. Limiting part; 1215. Mounting part; 1216. Second mounting groove; 122. First adapter part; 1221. First connection column;

[0035] 20. Battery pack;

[0036] 30. First temperature sensor;

[0037] 40. Second temperature sensor;

[0038] 50. Acquisition wire harness;

[0039] 60. Adapter;

[0040] 70. Bus bar; 71. Second connection hole; 72. Waist-shaped hole. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0042] First, an embodiment of the present application provides a bracket assembly 10. Please refer to Figure 1 、 Figure 2 and Figure 7 . The bracket assembly 10 is used for the battery module 1. The battery module 1 includes a battery pack 20. The battery pack 20 is composed of a plurality of single cells connected in series or in parallel. The single cell can be a cylindrical battery. Each single cell has two electrode ends. The battery pack 20 as a whole also has two electrode ends, namely the first electrode end and the second electrode end.

[0043] It should be noted that the first electrode end and the second electrode end can respectively refer to the sides where the positive output end and the negative output end of the battery pack 20 as a whole are located, or the sides where the two electrode ends of the single cells in the battery pack 20 are located. That is, the positive output end and the negative output end of the battery pack 20 as a whole can be located on the side where the first electrode end is located or the side where the second electrode end is located at the same time, or can be located on the side where the first electrode end is located and the side where the second electrode end is located respectively. There is no special limitation in the embodiments of the present application.

[0044] Among them, the bracket assembly 10 includes a plastic suction bracket 11 and a plastic bracket 12. The plastic suction bracket 11 includes a first bracket 111 and a second bracket 112 that are connected to each other. The first bracket 111 is used to be arranged on the side surface of the battery pack 20, and the second bracket 112 is used to be arranged on the first electrode end of the battery pack 20. The plastic bracket 12 is connected to the plastic suction bracket 11, and the plastic bracket 12 is used to be at least partially arranged on the second electrode end of the battery pack 20. That is, the plastic bracket 12 and the second bracket 112 are respectively arranged on the sides where the two electrode ends of the battery pack 20 are located, so as to facilitate the arrangement of the bus bar 70, and the bus bar 70 is used to connect the single cells in series or in parallel to form the battery pack 20; the first bracket 111 is arranged on the side surface of the battery pack 20, which helps to arrange structures such as the acquisition wire harness 50.

[0045] It should be noted that the plastic bracket 12 being used to be at least partially arranged on the second electrode end of the battery pack 20 means that the plastic bracket 12 can be only arranged on the second electrode end of the battery pack 20, or partially arranged on the second electrode end and partially arranged on the side surface of the battery pack 20. Its specific arrangement method can be adjusted according to the connection method between the plastic bracket 12 and the plastic suction bracket 11 and the structural requirements, and no special limitation is made here.

[0046] In the embodiment of the present application, by combining the plastic suction bracket 11 and the plastic bracket 12, arranging the first bracket 111 of the plastic suction bracket 11 on the side surface of the battery pack 20, arranging the second bracket 112 of the plastic suction bracket 11 on the first electrode end of the battery pack 20, and arranging the plastic bracket 12 at least partially on the second electrode end of the battery pack 20, it is possible to use the plastic suction bracket 11 to carry the acquisition wire harness 50 and part of the bus bar 70 in the battery module 1, so as to reduce the use of the plastic bracket 12 and reduce the production cost and weight of the bracket assembly 10; at the same time, arranging the plastic bracket 12 on the second electrode end of the battery pack 20 makes it possible to use the plastic bracket 12 with higher structural strength to carry the output pole bus bar 70 of the battery module 1 to ensure the stable connection between the battery module 1 and the external structure.

[0047] In some examples, the included angle between the first bracket 111 and the second bracket 112 is greater than or equal to 80° and less than or equal to 100°. If the included angle between the first bracket 111 and the second bracket 112 is too small, the space between the plastic bracket 12 and the plastic suction bracket 11 will be too small, which is not conducive to the arrangement of the battery pack 20; if the included angle between the first bracket 111 and the second bracket 112 is too large, the space between the plastic bracket 12 and the plastic suction bracket 11 will be too large, thus occupying too much space and being not conducive to the overall miniaturized design of the battery module 1.

[0048] It should be noted that an appropriate included angle can enhance the stability of the structure when bearing external forces. At the same time, the design of the included angle can disperse stress and reduce the risk of deformation and damage at the connection part. The included angle range in the embodiments of the present application provides sufficient flexibility to adapt to different application scenarios and requirements. This design enables the first bracket 111 and the second bracket 112 to be more easily matched and connected with other components or structures.

[0049] During actual use, the included angle between the first bracket 111 and the second bracket 112 can be set to 80°, 85°, 90° or 100°, etc. The specific value of the included angle can be selected and adjusted according to actual design requirements, and no special limitation is made here.

[0050] In some embodiments, please refer to Figure 4 and Figure 5 , on the side of the first bracket 111 facing the battery pack 20, there is a first installation groove 1111 for installing the first temperature sensor 30. Since the first bracket 111 is a part of the plastic suction bracket 11, when the first bracket 111 is plastic suction molded, the first installation groove 1111 can be formed on the side of the first bracket 111 facing the battery pack 20 at the same time, so that after the first temperature sensor 30 is installed in the first installation groove 1111, it can be located on the side surface of the battery pack 20, which is convenient for monitoring the temperature of the battery pack 20, and the position of the first installation groove 1111 can be adjusted according to actual monitoring requirements. For example, the first installation groove 1111 can be set at a position close to the middle area of the battery pack 20 to monitor the temperature at the middle position of the battery pack 20.

[0051] It should be noted that the first installation groove 1111 provides a fixed space and protection for the first temperature sensor 30, which can prevent the first temperature sensor 30 from being damaged in a complex environment, such as collision, extrusion or abrasion. This design helps to extend the service life of the first temperature sensor 30 and ensure its long-term stable operation. At the same time, by fixing the first temperature sensor 30 in the first installation groove 1111, the measurement error caused by the movement or vibration of the first temperature sensor 30 can be reduced. The design of the first installation groove 1111 can also reduce the influence of the external environment on the first temperature sensor 30, such as temperature gradient, air flow, etc., thereby improving the accuracy and stability of the measurement.

[0052] Among them, the first installation groove 1111 has an arc surface connected to the first temperature sensor 30. The diameter of the circle where the arc surface is located is between 4 mm and 8 mm, and can be set to 4 mm, 6 mm, 8 mm, etc. The design of the arc surface makes the contact between the first temperature sensor 30 and the first installation groove 1111 closer and more uniform, thereby enhancing the stability of the connection. This tight connection helps reduce the risk of the first temperature sensor 30 loosening or falling off due to vibration or impact. At the same time, the design of the arc surface may help optimize the heat conduction path, enabling the first temperature sensor 30 to receive and transfer heat more efficiently. This helps improve the accuracy and response speed of temperature measurement, especially in application scenarios where rapid response to temperature changes is required.

[0053] In addition, compared with a flat surface or a right-angle surface, the arc surface can distribute stress more evenly at the connection, thereby reducing the risk of stress concentration. This helps extend the service life of the first temperature sensor 30 and the first installation groove 1111, and avoid damage caused by long-term stress concentration. The design of the arc surface may make it easier for the first temperature sensor 30 to align and fix with the first installation groove 1111 during installation. In addition, this design also allows for fine-tuning within a certain range to ensure the optimal connection state between the first temperature sensor 30 and the first installation groove 1111. The diameter of the circle where the arc surface is located is between 4 mm and 8 mm, and this range may be applicable to a variety of first temperature sensors 30 with different sizes, thus meeting the requirements of different application scenarios and improving the compatibility and versatility of the device.

[0054] In some embodiments, please refer to Figure 3 and Figure 5 , a first through hole 1211 is formed in the plastic bracket 12. The first through hole 1211 penetrates the plastic bracket 12 along the thickness direction of the plastic bracket 12, and the first through hole 1211 is used for the acquisition wire harness 50 of the first temperature sensor 30 to pass through. Since the first temperature sensor 30 is arranged on the side of the first bracket 111 facing the battery pack 20, directly leading out the acquisition wire harness 50 of the first temperature sensor 30 from the plastic bracket 12 can avoid opening holes in the blister bracket 11, thereby helping to ensure the structural strength of the blister bracket 11 itself. Compared with the blister bracket 11, the plastic bracket 12 has a greater weight and higher strength. Opening the first through hole 1211 in the plastic bracket 12 has less impact on the structural strength of the plastic bracket 12 itself, and can also reduce the overall weight of the bracket assembly 10.

[0055] It should be noted that a wire trough can also be provided on the side of the first bracket 111 facing the battery pack 20. The wire trough is used to accommodate the acquisition wire harness 50 of the first temperature sensor 30. The wire trough provides a dedicated channel for the acquisition wire harness 50 of the first temperature sensor 30, avoiding the risk of damage to the acquisition wire harness 50 in a complex environment, such as abrasion, cutting or extrusion. By fixing the acquisition wire harness 50 in the wire trough, the possibility of loosening or breaking of the acquisition wire harness 50 caused by movement or vibration can be reduced. At the same time, the wire trough helps to make the acquisition wire harness 50 more tidy and orderly. This can not only improve the aesthetics of the device, but also reduce the difficulties in operation or maintenance caused by the chaos of the acquisition wire harness 50.

[0056] Secondly, for the first temperature sensor 30, the acquisition wire harness 50 may generate a certain amount of heat. Through the guidance of the wire trough, the heat of the acquisition wire harness 50 can be dissipated more effectively, avoiding the influence of local overheating on the performance of the first temperature sensor 30. In addition, the design of the wire trough can also consider the heat dissipation requirements, such as adding heat dissipation holes or using heat dissipation materials to further improve the heat dissipation efficiency. In some application scenarios with complex electromagnetic environments, the acquisition wire harness 50 of the first temperature sensor 30 may be affected by electromagnetic interference. By fixing the acquisition wire harness 50 in the wire trough and taking corresponding shielding measures (such as using shielded wire harnesses or filling shielding materials in the wire trough), the influence of electromagnetic interference on the performance of the first temperature sensor 30 can be reduced.

[0057] In addition, the design of the wire trough makes the acquisition wire harness 50 of the first temperature sensor 30 easier to align and fix during the installation process. This can not only reduce the installation difficulty, but also improve the installation efficiency. During the maintenance process, the wire trough also makes the acquisition wire harness 50 easier to access and inspect, helping to detect and solve problems in a timely manner. The wire trough, as the support structure of the acquisition wire harness 50 of the first temperature sensor 30, can enhance the stability of the overall structure. Especially in a vibration or shock environment, the wire trough can effectively reduce the shaking and displacement of the acquisition wire harness 50, thereby protecting the integrity of the first temperature sensor 30 and the acquisition wire harness 50.

[0058] In some embodiments, please refer to Figure 2, the plastic bracket 12 includes a first main body portion 121 and a first adapter portion 122 that are connected to each other. The first main body portion 121 is used to be disposed at the second electrode end of the battery pack 20, and the first adapter portion 122 is used to be disposed on the side surface of the battery pack 20. The first adapter portion 122 is connected to the first bracket 111. That is, the first main body portion 121 is mainly used to carry the series-parallel connection of the battery modules 1 and the output pole busbar 70 to ensure the stable connection between the battery module 1 and the external structure. By disposing the first adapter portion 122 on the side surface of the battery pack 20, on the one hand, it helps the connection design between the plastic bracket 12 and the first bracket 111, and on the other hand, enables the first adapter portion 122 to play a certain supporting role for the first bracket 111, so as to improve the overall structural strength of the bracket assembly 10.

[0059] In some embodiments, please refer to Figure 4 and Figure 6 , on the side of the first main body portion 121 facing the battery pack 20, a mounting portion 1215 is convexly provided. The mounting portion 1215 is provided with a second mounting groove 1216, and the second mounting groove 1216 is used to mount the second temperature sensor 40. Since the first main body portion 121 is disposed at the second electrode end of the battery pack 20, by convexly providing the mounting portion 1215 on the first main body portion 121, the second temperature sensor 40 can be disposed at a position close to the end of the single battery in the battery pack 20 to monitor the temperature of the end of the single battery. Through the combined use of the second temperature sensor 40 and the first temperature sensor 30, the temperature at different positions of the battery pack 20 can be monitored simultaneously, which helps to improve the use safety of the battery module 1.

[0060] It should be noted that by disposing the second temperature sensor 40 in the second mounting groove 1216 of the mounting portion 1215, the mounting portion 1215 can also play a certain protective role for the second temperature sensor 40 to reduce the risk of damage to the second temperature sensor 40 during use.

[0061] In some embodiments, a second through hole 1212 is formed in the first main body portion 121. The second through hole 1212 penetrates the first main body portion 121 along the thickness direction of the first main body portion 121, and the second through hole 1212 is used for the acquisition wire harness 50 of the second temperature sensor 40 to pass through. Since the second temperature sensor 40 is disposed on the side of the first bracket 111 facing the battery pack 20, directly leading out the acquisition wire harness 50 of the second temperature sensor 40 from the plastic bracket 12 can avoid opening holes in the plastic suction bracket 11, which helps to ensure the structural strength of the plastic suction bracket 11 itself. Compared with the plastic suction bracket 11, the plastic bracket 12 has a larger weight and higher strength. Opening the second through hole 1212 in the plastic bracket 12 has less impact on the structural strength of the plastic bracket 12 itself, and can also reduce the overall weight of the bracket assembly 10.

[0062] In some embodiments, refer to Figure 2 and Figure 3 , the first bracket 111 includes a second main body portion 1112 and a second adapter portion 1113 that are connected to each other. The second main body portion 1112 is connected to the second bracket 112, and the second adapter portion 1113 is connected to the first adapter portion 122. The second main body portion 1112 is used to dispose the adapter 60 of the battery module 1. Since the first bracket 111 is a part of the plastic suction bracket 11, compared with the plastic bracket 12, the thickness of the plastic suction bracket 11 is smaller. And the first bracket 111 is disposed on the side surface of the battery pack 20. By disposing the adapter 60 of the battery module 1 on the first bracket 111, the space utilization rate of the battery module 1 in the thickness direction of the first bracket 111 can be improved, which helps to increase the energy density of the battery module 1.

[0063] It should be noted that the second adapter portion 1113 and the first adapter portion 122 may be detachably connected, so that the connection between the plastic suction bracket 11 and the plastic bracket 12 is more flexible. Users can easily complete the installation and disassembly work without complex tools and steps. At the same time, when maintenance or component replacement is required, it can be quickly disassembled and reinstalled, reducing the maintenance cost and time. And because the connection is detachable, when the bracket assembly 10 needs to be repaired, the relevant components can be conveniently disassembled for inspection and repair, which is beneficial to improving the overall reliability and stability of the battery module 1.

[0064] In addition, the detachable connection allows the plastic suction bracket 11 and the plastic bracket 12 to be adjusted as needed and can be reused, reducing resource waste. When a component fails, only the component needs to be replaced instead of the entire device, which helps to reduce environmental pollution and save resources.

[0065] In some examples, refer to Figure 2 , one of the first connection posts 1221 or the first connection holes 1116 is provided on the second adapter portion 1113, and the other of the first connection posts 1221 or the first connection holes 1116 is provided on the first adapter portion 122. The first connection post 1221 and the first connection hole 1116 are thermally riveted together to connect the second adapter portion 1113 and the first adapter portion 122. This connection method is simpler and faster than bolt connection or welding. Installation can be completed without complex tools and steps, which helps to reduce the installation time and cost and improve work efficiency. Through precise thermal riveting, accurate alignment and tight connection between the second adapter portion 1113 and the first adapter portion 122 can be ensured. This high-precision connection also helps to reduce loosening and deformation at the connection part, improving the stability and reliability of the entire system.

[0066] In some embodiments, the second main body portion 1112 is recessed relative to the second adapter portion 1113 in a direction approaching the battery pack 20. Since the thickness of the blister bracket 11 is relatively small compared to that of the plastic bracket 12, the first adapter portion 122 of the plastic bracket 12 is disposed on the side surface of the battery pack 20, such that when the second adapter portion 1113 of the blister bracket 11 is connected to the first adapter portion 122, a ramp structure is formed with the second main body portion 1112, that is, the second main body portion 1112 is recessed relative to the second adapter portion 1113 in a direction approaching the battery pack 20, and the second main body portion 1112 is used to dispose the adapter 60 of the battery module 1, thereby contributing to further improving the space utilization rate of the battery module 1 in the thickness direction of the first bracket 111, and further contributing to improving the energy density of the battery module 1.

[0067] In some examples, please refer to Figure 3 , a third mounting groove 1114 is provided on a side of the second main body portion 1112 facing away from the battery pack 20, and the third mounting groove 1114 is used to dispose the adapter 60. That is, when the first bracket 111 is subjected to blister molding, the third mounting groove 1114 can be simultaneously formed on a side of the second main body portion 1112 facing away from the battery pack 20. By disposing the adapter 60 in the third mounting groove 1114, it is possible to further reduce the increase in the height of the battery module 1 in the thickness direction of the first bracket 111 caused by the setting of the adapter 60, thereby improving the space utilization rate of the battery module 1 in the thickness direction of the first bracket 111, and further improving the energy density of the battery module 1.

[0068] In some embodiments, please refer to Figure 5 , a third through hole 1115 is formed in the second main body portion 1112, and the third through hole 1115 penetrates the second main body portion 1112 along the thickness direction of the second main body portion 1112. The third through hole 1115 is used for the acquisition wire harness 50 to pass through and be connected to the adapter 60. Since the second bracket 112 is disposed at the first electrode end of the battery pack 20 and the second bracket 112 is used to carry the bus bar 70, when the battery pack 20 is assembled into the battery module 1, the acquisition wire harness 50 is connected to the bus bar 70 to monitor the voltage of the battery pack 20, and the second main body portion 1112 is used to carry the corresponding acquisition wire harness 50. By providing the third through hole 1115 in the second main body portion 1112, after the acquisition wire harness 50 winds from the bus bar 70 at the first electrode end to a side of the second main body portion 1112 facing away from the battery pack 20, it can pass through the third through hole 1115 and wind to a side of the second main body portion 1112 facing the battery pack 20, and then wind to be connected to the adapter 60, so that the acquisition wire harness 50 can be partially hidden on a side of the second main body portion 1112 facing the battery pack 20, reducing the risk of interference between the acquisition wire harness 50 and other external structures, and improving the monitoring stability of the acquisition wire harness 50.

[0069] In some examples, a fourth through-hole 1213 is formed in the first main body portion 121. The fourth through-hole 1213 penetrates the first main body portion 121 along the thickness direction of the first main body portion 121. The third through-hole 1115 and the fourth through-hole 1213 are used for the acquisition wire harness 50 to pass through in sequence and connect to the adapter 60. That is, after the acquisition wire harness 50 winds from the bus bar 70 at the first electrode end to the side of the second main body portion 1112 away from the battery pack 20, it can pass through the third through-hole 1115 to the side of the second main body portion 1112 facing the battery pack 20, then pass through the fourth through-hole 1213 to the side of the first main body portion 121 away from the battery pack 20, and then wind to the side of the second main body portion 1112 away from the battery pack 20 and connect to the adapter 60. Through the cooperation of the third through-hole 1115 and the fourth through-hole 1213, the acquisition wire harness 50 can be partially hidden on the side of the second main body portion 1112 facing the battery pack 20, reducing the risk of interference between the acquisition wire harness 50 and other external structures. At the same time, it can also prevent the acquisition wire harness 50 from being directly bent on the side of the second main body portion 1112 away from the battery pack 20, thereby improving the monitoring stability of the acquisition wire harness 50.

[0070] In some embodiments, please refer to Figure 3 , a limiting portion 1214 protrudes from the side of the first main body portion 121 away from the battery pack 20. The orthographic projection of the limiting portion 1214 on the first main body portion 121 is at least partially located in the fourth through-hole 1213. That is, after the acquisition wire harness 50 passes through the third through-hole 1115 and the fourth through-hole 1213 in sequence, the limiting portion 1214 limits the acquisition wire harness 50 to improve the orderliness of the acquisition wire harness 50 on the side of the first main body portion 121 away from the battery pack 20. At the same time, the limiting portion 1214 can also play a certain protective role for the acquisition wire harness 50, reducing the risk of interference between the acquisition wire harness 50 and external structures, thereby improving the monitoring stability of the acquisition wire harness 50.

[0071] In some embodiments, please refer to Figure 4 , a fourth installation groove 1121 is provided on the side of the second bracket 112 away from the battery pack 20. The fourth installation groove 1121 is used to arrange the acquisition wire harness 50. Since the second bracket 112 is arranged at the first electrode end of the battery pack 20 and the second bracket 112 is used to carry the bus bar 70, when the battery pack 20 is assembled into the battery module 1, the acquisition wire harness 50 will be connected to the bus bar 70 to monitor the voltage of the battery pack 20. By providing the fourth installation groove 1121 on the side of the second bracket 112 away from the battery pack 20, the acquisition wire harness 50 can be arranged along the fourth installation groove 1121, which helps to improve the orderliness of the acquisition wire harness 50 on the second bracket 112, and further improves the monitoring stability of the acquisition wire harness 50.

[0072] In some embodiments, the thickness of the plastic bracket 12 is greater than or equal to 1 mm and less than or equal to 2 mm. If the thickness of the plastic bracket 12 is too large, the weight of the plastic bracket 12 will be too large, resulting in a relatively large overall weight of the battery module 1 and affecting the energy density of the battery module 1. If the thickness of the plastic bracket 12 is too small, the structural strength of the plastic bracket 12 will be too low, resulting in relatively poor overall structural stability of the bracket assembly 10.

[0073] During the actual manufacturing process, the thickness of the plastic bracket 12 can be set to 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, etc. The specific value of its thickness can be selected and adjusted according to actual design requirements, as long as it ensures that the plastic bracket 12 has sufficient structural strength while reducing the weight of the plastic bracket 12. There is no special limitation here.

[0074] In some embodiments, the thickness of the plastic suction bracket 11 is greater than or equal to 0.5 mm and less than or equal to 0.8 mm. If the thickness of the plastic suction bracket 11 is too large, the weight of the plastic suction bracket 11 will be too large, resulting in a relatively large overall weight of the battery module 1 and affecting the energy density of the battery module 1. If the thickness of the plastic suction bracket 11 is too small, the structural strength of the plastic suction bracket 11 will be too low, resulting in relatively poor overall structural stability of the bracket assembly 10.

[0075] During the actual manufacturing process, the thickness of the plastic suction bracket 11 can be set to 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, etc. The specific value of its thickness can be selected and adjusted according to actual design requirements, as long as it ensures that the plastic suction bracket 11 has sufficient structural strength while reducing the weight of the plastic suction bracket 11. There is no special limitation here.

[0076] Secondly, the embodiment of the present application also provides a battery module. The battery module includes the above-mentioned bracket assembly. For the specific structure of the bracket assembly, refer to the above embodiments. Since this battery module adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0077] Please refer to Figure 7 , the battery module 1 includes a bracket assembly 10 and a battery pack 20. The battery pack 20 is arranged in the area surrounded by the bracket assembly 10. Among them, the bracket assembly 10 includes a plastic suction bracket 11 and a plastic bracket 12. The plastic suction bracket 11 includes a first bracket 111 and a second bracket 112 connected to each other. The first bracket 111 is arranged on the side surface of the battery pack 20, and the second bracket 112 is arranged at the first electrode end of the battery pack 20. The plastic bracket 12 is connected to the plastic suction bracket 11, and the plastic bracket 12 is used to be at least partially arranged at the second electrode end of the battery pack 20.

[0078] By combining the blister bracket 11 with the plastic bracket 12, and setting the first bracket 111 of the blister bracket 11 on the side surface of the battery pack 20, setting the second bracket 112 of the blister bracket 11 on the first electrode end of the battery pack 20, and at least partially setting the plastic bracket 12 on the second electrode end of the battery pack 20, the blister bracket 11 can be used to carry the collection harness 50 and part of the bus 70 in the battery module 1, so as to reduce the use of the plastic bracket 12 and reduce the production cost and weight of the bracket assembly 10; at the same time, the plastic bracket 12 is set at the second electrode end of the battery pack 20, so that the plastic bracket 12 with higher structural strength can be used to carry the output bus 70 of the battery module 1 to ensure the stable connection between the battery module 1 and the external structure.

[0079] The battery module 1 also includes a first temperature sensor 30 and a second temperature sensor 40. The first temperature sensor 30 and the second temperature sensor 40 are both arranged on the side of the first bracket 111 facing the battery pack 20. The first temperature sensor 30 is used to monitor the temperature at the middle position of the battery pack 20, and the second temperature sensor 40 is used to monitor the temperature at the end position of the battery pack 20. Through the mutual cooperation of the first temperature sensor 30 and the second temperature sensor 40, the reliability of temperature monitoring of the battery pack 20 can be improved, thereby ensuring the safety of use of the battery module 1.

[0080] The specific configuration of the first temperature sensor 30 and the second temperature sensor 40 can refer to the relevant description in the above embodiments, which will not be described in detail here.

[0081] The battery module 1 also includes an adapter 60 and a collection harness 50, and the collection harness 50 is used to collect temperature signals and voltage signals of the battery pack 20 to monitor the working state of the battery module 1. The adapter 60 is arranged on the side of the first bracket 111 away from the battery pack 20, and the adapter 60 is connected to the collection harness 50, and the adapter 60 is used to connect to an external device to output the temperature signal and voltage signal collected by the collection harness 50, thereby realizing real-time monitoring of the working state of the battery module 1.

[0082] The battery module 1 further includes a bus bar 70 , which is disposed on the plastic bracket 12 and the second bracket 112 . The bus bar 70 is used to be electrically connected to the single cells in the battery pack 20 to achieve series-parallel connection between the single cells, thereby forming the battery pack 20 .

[0083] In some embodiments, one of the second connecting posts 1122 or the second connecting holes 71 is provided on the second bracket 112, and the other of the second connecting posts 1122 or the second connecting holes 71 is provided on the bus bar 70. The second connecting post 1122 and the second connecting hole 71 are thermally riveted together to connect the second bracket 112 and the bus bar 70. This connection method is simpler and faster than bolt connection or welding, and can be completed without complex tools and steps, which helps to reduce the installation time and cost and improve work efficiency. Through precise plug-in fit, accurate alignment and tight connection between the second bracket 112 and the bus bar 70 can be ensured. This high-precision connection helps to reduce loosening and deformation at the connection part and improve the stability and reliability of the entire system.

[0084] Wherein, the diameter of the second connecting post 1122 is greater than or equal to 3.5 mm and less than or equal to 5.5 mm, and can be set to 3.5 mm, 4 mm, 4.5 mm, 5 mm or 5.5 mm, etc., so that the second connecting post 1122 can provide sufficient structural strength to support and fix the components connected thereto. This strength ensures the reliability and stability of the connection. Especially in the case of bearing dynamic loads or vibrations, the moderate diameter also makes the second connecting post 1122 easier to operate during installation and disassembly.

[0085] In some embodiments, the distance that the second connecting post 1122 protrudes from the second connecting hole 71 along its own axis direction is between 1.5 mm and 3.5 mm, and can be set to 1.5 mm, 2 mm or 3.5 mm, etc. Within this range, the second connecting post 1122 can be firmly inserted into the second connecting hole 71 to ensure the stability and reliability of the connection. This firm connection helps to prevent connection loosening or failure caused by vibration, impact or load change. The appropriate protruding distance can provide a certain gap between the second connecting post 1122 and the second connecting hole 71, which is beneficial for accommodating tolerances, avoiding interference fit and reducing assembly stress. This gap also helps to reduce the problems of thermal expansion and contraction caused by temperature changes, thus maintaining the stability of the connection.

[0086] In some embodiments, the bus bar 70 is provided with waist-shaped holes 72, and the bus bar 70 is welded to the single cell through the waist-shaped holes 72. The setting of the waist-shaped holes 72 helps to observe the state of the single cell pole column and avoid deflection of the single cell pole column during the welding process.

[0087] Finally, the present application also proposes a battery pack, and the battery pack includes the above-mentioned battery module. For the specific structure of the battery module, refer to the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0088] The above has introduced the embodiments of the present application in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A bracket assembly, characterized in that, For a battery module, the battery module includes a battery pack, and the bracket assembly includes: The blister bracket comprises a first bracket and a second bracket connected to each other, wherein the first bracket is used to be arranged on a side surface of the battery pack, and the second bracket is used to be arranged on a first electrode end of the battery pack; A plastic bracket is connected to the blister bracket, and the plastic bracket is used to be at least partially disposed on the second electrode terminal of the battery pack.

2. The bracket assembly according to claim 1, wherein, A first mounting groove is provided on a side of the first bracket facing the battery pack, and the first mounting groove is used for mounting a first temperature sensor.

3. The bracket assembly according to claim 2, characterized in that, The plastic bracket is provided with a first through hole, which penetrates the plastic bracket along the thickness direction of the plastic bracket, and is used for allowing a collection harness of the first temperature sensor to pass through the first through hole.

4. The bracket assembly according to claim 1, wherein, The plastic bracket includes a first main body and a first adapter that are connected to each other, the first main body is used to be arranged at the second electrode end of the battery pack, the first adapter is used to be arranged on the side surface of the battery pack, and the first adapter is connected to the first bracket.

5. The bracket assembly according to claim 4, wherein, A mounting portion is convexly disposed on a side of the first main body facing the battery pack. The mounting portion is provided with a second mounting groove. The second mounting groove is used for mounting a second temperature sensor.

6. The bracket assembly according to claim 5, wherein, The first main body is provided with a second through hole, which penetrates the first main body along the thickness direction of the first main body, and is used for allowing a collection harness of the second temperature sensor to pass through the second through hole.

7. The bracket assembly according to claim 4, wherein The first bracket includes a second main body portion and a second adapter portion connected to each other, the second main body portion is connected to the second bracket, and the second adapter portion is connected to the first adapter portion; the second main body portion is used to set the adapter of the battery module.

8. The stent assembly according to claim 7, wherein, The second main body portion is recessed relative to the second adapter portion toward a direction approaching the battery pack.

9. The stent assembly according to claim 7, characterized in that A third mounting groove is disposed on a side of the second main body away from the battery pack, and the third mounting groove is used to set the adapter.

10. The bracket assembly according to claim 7, characterized in that, A third through hole is formed on the second main body portion, and the third through hole penetrates the second main body portion along the thickness direction of the second main body portion. The third through hole is used for the collection harness to pass through and connect with the adapter.

11. The bracket assembly according to claim 10, wherein, A fourth through hole is formed on the first main body portion, and the fourth through hole penetrates the first main body portion along the thickness direction of the first main body portion. The third through hole and the fourth through hole are used for the collection harness to pass through in sequence and be connected to the adapter.

12. The bracket assembly according to claim 11, wherein, A limiting portion is protruded from a side of the first main body away from the battery pack, and an orthographic projection of the limiting portion on the first main body is at least partially located in the fourth through hole.

13. The bracket assembly according to claim 1, wherein, A fourth mounting groove is provided on a side of the second bracket facing away from the battery pack, and the fourth mounting groove is used for arranging a collection harness.

14. The stent assembly according to any one of claims 1-13, characterized in that, The thickness of the plastic bracket is greater than or equal to 1 mm and less than or equal to 2 mm.

15. The stent assembly according to any one of claims 1-13, characterized in that, The thickness of the blister bracket is greater than or equal to 0.5 mm and less than or equal to 0.8 mm.

16. A battery module, characterized in that, A bracket assembly comprising any one of claims 1-15.

17. A battery pack, characterized in that, Comprising the battery module as claimed in claim 16.

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