Mounting bracket, battery pack and electric device

Abstract

The present application relates to the technical field of batteries. Provided are a mounting bracket, a battery pack and an electric device. The mounting bracket comprises: a first member; and a second member, which has a first surface and a second surface that are arranged opposite each other, wherein the first surface is configured to mount a first BMS board, and the second surface is connected to the first member to define a mounting space, a wire insertion opening and a heat dissipation opening, the wire insertion opening and the heat dissipation opening communicating the mounting space with the outside, and the mounting space being configured to mount a second BMS board.

Description

Mounting brackets, battery packs, and electrical equipment

[0001] This application claims priority to Chinese Patent Application No. 202423295804.7, filed with the Chinese Patent Office on December 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a mounting bracket, a battery pack, and an electrical device. Background Technology

[0003] The battery pack includes a housing, battery modules housed within the housing, and a BMS (Battery Management System) board. Each battery module comprises multiple electrically connected cells. The BMS board is electrically connected to the battery modules via a data acquisition component. This component transmits temperature and voltage signals from the battery cells to the BMS board.

[0004] In related technologies, multiple Battery Management System (BMS) boards are configured for the battery pack to improve the monitoring accuracy, efficiency, and reliability of battery pack operating information. These BMS boards are fixed to the base plate of the battery pack using mounting brackets. Furthermore, the multiple BMS boards are arranged sequentially away from the battery cells. Because the BMS boards contain numerous heat-generating electronic components, such as microcontrollers, power transistors, and operational amplifiers, these components cause the BMS board's operating temperature to rise. This, in turn, reduces the accuracy of the BMS board's battery status monitoring and the reliability of its control functions. Invention Overview

[0005] Therefore, how to improve the heat dissipation efficiency of mounting brackets with multiple BMS boards is the problem that this application aims to solve.

[0006] In a first aspect, this application provides a mounting bracket, which includes a first component and a second component; the second component has a first surface and a second surface disposed opposite to each other, the first surface is configured to mount a first BMS board, and the second surface is connected to the first component to define an installation space, a wiring port and a heat dissipation port, the wiring port and the heat dissipation port communicating the installation space with the outside world, and the installation space is configured to mount a second BMS board.

[0007] Secondly, this application provides a battery pack, which includes a base plate, a battery module, a data acquisition component, a first BMS board, a second BMS board, and the aforementioned mounting bracket; the battery module includes multiple electrically connected cells, which are disposed on the base plate; the data acquisition component is electrically connected to the battery module; a first component is connected to the base plate; the first BMS board is disposed on a first surface, the second BMS board is disposed in the mounting space, and the first BMS board and the second BMS board are electrically connected to the data acquisition component.

[0008] Thirdly, this application provides an electrical device that includes the aforementioned battery pack. Beneficial effects

[0009] In the embodiments of this application, by providing a first component and a second component to define an installation space and a heat dissipation vent connecting the installation space to the outside, the BMS board located on the first surface can directly dissipate heat to the external environment, while the BMS board located within the installation space can dissipate heat through the heat dissipation vent. This improves the heat dissipation efficiency of the BMS board, thereby enhancing the accuracy of battery status monitoring and the reliability of its control functions. Attached Figure Description

[0010] Figure 1 is a schematic diagram of the mounting bracket provided in an embodiment of this application;

[0011] Figure 2 is a cross-sectional view of AA in Figure 1;

[0012] Figure 3 is a schematic diagram of the mounting bracket provided in the embodiment of this application cooperating with the first BMS board and the second BMS board;

[0013] Figure 4 is a structural schematic diagram of the second component provided in an embodiment of this application;

[0014] Figure 5 is a structural schematic diagram of the first component provided in an embodiment of this application;

[0015] Figure 6 is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0016] Figure 7 is an exploded view of some components of the battery pack provided in an embodiment of this application;

[0017] Figure 8 is an exploded view of the battery pack provided in an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1- Mounting bracket;

[0020] 11-First component; 111-Heat dissipation hole; 112-Second groove; 113-First stud; 114-First nut;

[0021] 12-Second component; 121-First surface; 122-Second surface; 123-First groove; 124-Through groove; 1241-First slot; 125-Second stud; 126-Second nut;

[0022] 13-Installation space; 14-Connection port; 15-Heat vent; 16-Third stud; 17-Third nut; 18-Wire hole;

[0023] 2-Battery pack; 211-First BMS board; 212-Second BMS board; 213-Fuse; 214-Aerosol fire suppression system; 22-Base plate; 23-Battery module; 231-Cell row; 2311-Cell; 2312-Heat insulation board; 2313-Cable tie; 2314-End plate;

[0024] 24-Acquisition component; 241-Insulating bracket; 242-Connecting bar; 243-Acquisition harness;

[0025] 25 - Pressure sensor; 251 - Pressure diaphragm;

[0026] 26-Box cover; 261-Inspection port; 262-Inspection plate; 263-Mounting port; 264-Mounting plate; 265-Sealing strip; 267-Reinforced structure; 268-Explosion-proof valve;

[0027] 27 - Insulating sheet; 28 - Buffer pad;

[0028] 29-Temperature sensor. Embodiments of the present invention

[0029] Please refer to Figures 1 and 2. Figure 1 is a structural schematic diagram of the mounting bracket 1 provided in an embodiment of this application, and Figure 2 is a cross-sectional view of AA in Figure 1. An embodiment of this application provides a mounting bracket 1. The mounting bracket 1 includes a first component 11 and a second component 12. The second component 12 has a first surface 121 and a second surface 122 disposed opposite to each other. The first surface 121 is configured to mount a first BMS board 211. The second surface 122 is connected to the first component 11 to define a mounting space 13, a wiring port 14, and a heat dissipation vent 15. The wiring port 14 and the heat dissipation vent 15 communicate the mounting space 13 with the outside world. The mounting space 13 is configured to mount a second BMS board 212.

[0030] It is understood that the first BMS board 211 can be fixed to the first component 11 by screws or similar fasteners, glued to the first component 11, or snapped onto the first component 11. The second BMS board 212 can be fixed to the mounting space 13 in the same way as the first BMS board 211 is fixed to the first component 11, or it can be different.

[0031] It is understandable that the wiring harness passes through the connector 14 and is electrically connected to the second BMS board 212.

[0032] It is understandable that the plug port 14 can be arranged adjacent to the heat dissipation port 15, or they can be located at opposite ends of the second component 12.

[0033] It is understood that the first component 11 can be connected to the second component 12 by screw-type fasteners, or the first component 11 and the second component 12 can be glued or snapped together.

[0034] In use, the first BMS board 211 is fixed to the first side, and the second BMS board 212 is fixed in the mounting space 13, as shown in Figure 3. Figure 3 is a schematic diagram of the mounting bracket 1 provided in the embodiment of this application cooperating with the first BMS board 211 and the second BMS board 212. The second BMS board 212 is located between the first BMS board 211 and the battery cell 2311. The first component 11 is fixed to the bottom plate 22 of the battery pack 2. One part of the wiring harness of the battery pack 2 is electrically connected to the first BMS board 211, and the other part of the wiring harness of the battery pack 2 is electrically connected to the second BMS board 212.

[0035] During operation, the first BMS board 211 can directly dissipate heat to the external environment for heat dissipation. The second BMS board 212 can dissipate heat to the external environment through the installation space 13 and the heat dissipation vent 15.

[0036] In this embodiment, by providing a first component 11 and a second component 12 to define an installation space 13 and a heat dissipation vent 15 connecting the installation space 13 to the outside, the BMS board located on the first surface 121 can directly dissipate heat to the external environment, while the BMS board located within the installation space 13 can dissipate heat through the heat dissipation vent 15. This improves the heat dissipation efficiency of the BMS board, thereby enhancing the accuracy of battery status monitoring and the reliability of its control functions.

[0037] In addition, the above solution can not only improve the control efficiency and controllability of the battery pack 2, but also separate the first BMS board 211 and the second BMS board 212 from each other to reduce their influence on each other.

[0038] Referring to Figures 2 and 3, in one embodiment, the second surface 122 is provided with a first groove 123. The first groove 123 is configured to be opposite to the second BMS board 212, and the bottom wall of the first groove 123 is configured to be spaced apart from the second BMS board 212. In this way, an airflow space can be formed between the bottom wall of the first groove 123 and the second BMS board 212, thereby increasing the heat dissipation area and heat dissipation channel of the second BMS board 212 located in the mounting space 13, thereby improving the heat dissipation efficiency of the BMS board.

[0039] Specifically, the middle part of the second component 12 is recessed away from the first component 11 to form a first groove 123. This makes the thickness of the second component 12 more uniform, thereby improving its stress state and avoiding stress concentration.

[0040] Please refer to Figure 4, which is a structural schematic diagram of the second component 12 provided in an embodiment of this application. In one embodiment, a through groove 124 is provided on the second component 12. The through groove 124 penetrates the first surface 121 and the second surface 122.

[0041] It is understandable that the slot of through groove 124 is connected to the outside.

[0042] In this embodiment, by providing the through slot 124, firstly, the heat dissipation area of ​​the first BMS board 211 mounted on the first surface 121 can be increased, thereby improving the heat dissipation efficiency of the first BMS board 211; secondly, the through slot 124 can connect the mounting space 13 with the outside world, thereby increasing the heat dissipation path of the mounting space 13, thereby improving the heat dissipation efficiency of the second BMS board 212 located in the mounting space 13.

[0043] Referring to Figure 2, in one embodiment, the through-slot 124 has a first slot 1241 located between the first surface 121 and the second surface 122, and the heat dissipation port 15 and the first slot 1241 are respectively located at both ends of the second member 12. This avoids mutual interference between the airflows flowing to the heat dissipation port 15 and the slot 124, thereby improving the smoothness of airflow in the mounting space 13 and facilitating improved heat dissipation efficiency of the BMS board.

[0044] Please refer to Figure 5, which is a structural schematic diagram of the first component 11 provided in an embodiment of this application. In one embodiment, the first component 11 is provided with heat dissipation holes 111, which communicate with the mounting space 13. This increases the area of ​​the mounting space 13 that communicates with the outside world, thereby improving the heat dissipation efficiency of the second BMS board 212 located in the mounting space 13.

[0045] Referring to Figure 2, in one embodiment, the second surface 122 is provided with a first groove 123. The first component 11 is provided with a second groove 112. The openings of the first groove 123 and the second groove 112 communicate with each other to form an installation space 13. A wiring port 14 is provided on the sidewall of the first groove 123 and / or the wall of the second groove 112. A heat dissipation port 15 is provided on the sidewall of the first groove 123 and / or the wall of the second groove 112.

[0046] It is understood that the plug-in port 14 can be set on the side wall of the first groove 123, or on the side wall of the second groove 112, or a part of the plug-in port 14 can be set on the side wall of the first groove 123 and another part can be set on the side wall of the second groove 112.

[0047] It is understood that the heat dissipation vent 15 can be set on the side wall of the first groove 123, or on the side wall of the second groove 112, or a portion of the heat dissipation vent 15 can be set on the side wall of the first groove 123 and another portion can be set on the side wall of the second groove 112.

[0048] Specifically, one side edge of the second member 12 is spaced apart from the adjacent groove wall of the second groove 112 to form a heat dissipation vent 15. One side groove wall of the second groove 112 is provided with an opening to form a wire insertion port 14.

[0049] It is understood that one end of the second BMS board 212 is located in the first groove 123, and the other end is located in the second groove 112.

[0050] In this embodiment, the above-mentioned arrangement can both form the installation space 13 and prevent the depth of the groove formed by either the first component 11 or the second component 12 to fit the second BMS plate 212 from being too large, thereby effectively ensuring the structural rigidity of the first component 11 and the second component 12, which is conducive to improving the structural stability of the mounting bracket 1 for mounting the BMS plate.

[0051] Referring to Figure 1, in one embodiment, the mounting bracket 1 further includes a first stud 113 and a first nut 114. One end of the first stud 113 is connected to the first member 11, and the other end is configured to pass through the first BMS plate 211 and be threadedly connected to the first nut 114. And / or, the mounting bracket 1 further includes a second stud 125 and a second nut 126. One end of the second stud 125 is connected to the second member 12, and the other end is configured to pass through the second BMS plate 212 and be threadedly connected to the second nut 126.

[0052] Specifically, the mounting bracket 1 further includes a first stud 113 and a first nut 114. One end of the first stud 113 is connected to the first component 11, and the other end is configured to pass through the first BMS plate 211 and be threadedly connected to the first nut 114. Alternatively, the mounting bracket 1 further includes a second stud 125 and a second nut 126. One end of the second stud 125 is connected to the second component 12, and the other end is configured to pass through the second BMS plate 212 and be threadedly connected to the second nut 126. Alternatively, the mounting bracket 1 further includes a first stud 113 and a first nut 114. One end of the first stud 113 is connected to the first component 11, and the other end is configured to pass through the first BMS plate 211 and be threadedly connected to the first nut 114. Furthermore, the mounting bracket 1 further includes a second stud 125 and a second nut 126. One end of the second stud 125 is connected to the second component 12, and the other end is configured to pass through the second BMS plate 212 and be threadedly connected to the second nut 126.

[0053] Specifically, both the first stud 113 and the second stud 125 are press-fit studs. The first stud 113 is press-fitted to the first component 11. The second stud 125 is press-fitted to the second component 12.

[0054] It is understood that the first stud 113 passes through the bolt hole on the outer shell of the first BMS plate 211 and is threadedly connected to the first nut 114. The second stud 125 passes through the bolt hole on the outer shell of the second BMS plate 212 and is threadedly connected to the second nut 126.

[0055] In this embodiment, the first BMS board 211 and the second BMS board 212 can be detachably fixed on the mounting bracket 1 through the above-mentioned settings, which can help improve the convenience of maintenance and the replaceability of each BMS board.

[0056] Referring to Figure 1, in one embodiment, the mounting bracket 1 further includes a third stud 16 and a third nut 17. One end of the third stud 16 is connected to one of the first member 11 and the second member 12, and the other end passes through the other and is threadedly connected to the third nut 17.

[0057] Specifically, one end of the third stud 16 is connected to the first component 11, and the other end passes through the second component 12 and is threadedly connected to the third nut 17.

[0058] In this embodiment, the above-described configuration allows for a detachable connection between the first component 11 and the second component 12. This not only facilitates the mounting of multiple BMS boards onto the mounting bracket 1 but also improves maintenance convenience.

[0059] Referring to Figure 1, in one embodiment, at least one of the first component 11 and the second component 12 is provided with a wire hole 18 in a portion adjacent to the insertion port 14.

[0060] Specifically, when the second component 12 is provided with a through groove 124 and the insertion port 14 is connected to the groove of the through groove 124, the threading hole 18 is provided on the first component 11.

[0061] It is understandable that the acquisition harness 243 is plugged into the harness interface of the BMS board. To improve the stability of the harness and avoid messy wiring, cable ties 2313 can be used to bind the harness. At the same time, the cable ties 2313 can be threaded through the cable hole 18 to improve the stability of the harness and prevent it from shaking due to vibration.

[0062] Please refer to Figures 1-6. Figure 6 is a schematic diagram of the structure of the battery pack 2 provided in an embodiment of this application. Accordingly, this application embodiment also provides a battery pack 2, which includes a base plate 22, a battery module 23, a data acquisition component 24, a first BMS board 211, a second BMS board 212, and the aforementioned mounting bracket 1. The battery module 23 includes a plurality of electrically connected cells 2311. The cells 2311 are disposed on the base plate 22. The data acquisition component 24 is electrically connected to the battery module 23. A first component 11 is connected to the base plate 22. The first BMS board 211 is disposed on a first surface 121. The second BMS board 212 is disposed in the mounting space 13. The first BMS board 211 and the second BMS board 212 are electrically connected to the data acquisition component 24.

[0063] It is understandable that multiple 2311 cells are connected in series or in parallel, or that some 2311 cells are connected in parallel and others are connected in series.

[0064] It is understandable that battery pack 2 may also include components such as liquid cooling plate and cover 26.

[0065] It is understood that battery pack 2 may also include fuse 213, MSD (Manual Service Disconnect), and high-voltage socket. These electrical components are connected by copper busbars to form a current loop.

[0066] For example, the battery module 23 includes four cell rows 231, each cell row 231 including 13 cells 2311. The 13 cells 2311 in each cell row 231 are arranged sequentially to form the cell row 231. The multiple cells 2311 in each cell row 231 are connected in series via aluminum busbars. The cell rows 231 are interconnected via copper busbars. Specifically, the four cell rows 231 are connected in series via multiple copper busbars. The copper busbars are connected to their corresponding aluminum busbars by bolts to achieve interlocking fixation between the copper and aluminum busbars. In this way, the battery pack 2 can perform high-power charging and discharging.

[0067] In this embodiment, by employing the mounting bracket 1 provided in some embodiments of this application, the BMS board located on the first surface 121 can directly dissipate heat to the external environment, while the BMS board located within the mounting space 13 can dissipate heat through the heat dissipation vent 15. This improves the heat dissipation efficiency of the BMS board, thereby enhancing the accuracy of battery status monitoring and the reliability of its control functions.

[0068] Please refer to Figure 7, which is an exploded view of some components of the battery pack 2 provided in an embodiment of this application. In one embodiment, the battery cell 2311 is a prismatic cell 2311. The battery module 23 includes multiple cell rows 231. Each cell row 231 includes multiple cells 2311 stacked sequentially. The battery pack 2 also includes a pressure sensor 25. The pressure sensor 25 is disposed at one or both ends of the cell row 231. The pressure sensor 25 is electrically connected to the first BMS board 211 and / or the second BMS board 212.

[0069] It is understood that end plates 2314 are provided at both ends of each cell row 231. The cells 2311 and end plates 2314 of each cell row 231 are bound together by cable ties 2313. The cable ties 2313 can be plastic or steel. There can be one or multiple cable ties 2313.

[0070] Specifically, the pressure sensor 25 includes two pressure diaphragms 251, located at both ends of the cell array 231. Pressure sensing terminals are covered on the pressure diaphragms 251. Each pressure diaphragm 251 is connected to the data acquisition unit via an extended detection strip. The data acquisition unit transmits the data to either the first BMS board 211 or the second BMS board 212. When the pressure information collected by the pressure sensor 25 reaches a threshold, a relevant alarm action is triggered.

[0071] When the battery pack 2 includes multiple cell rows 231, a pressure sensor 25 can be configured for each cell row 231. If space is limited in the battery pack 2, a pressure sensor 25 can be selectively configured for one of the cell rows 231.

[0072] In this embodiment, by setting a pressure sensor 25, the compressive force received by the cell 2311 can be detected, which is beneficial to monitor the working status of the cell 2311 and improve the safety of the battery pack 2.

[0073] Referring to Figure 7, in one embodiment, the battery cell 2311 is a prismatic cell 2311. The battery module 23 includes multiple cell rows 231. Each cell row 231 includes multiple cells 2311 stacked sequentially. A heat insulation plate 2312 is provided between two adjacent cells 2311. In this way, the heat insulation plate 2312 can prevent heat propagation in the event of thermal runaway of the cell 2311, and can also buffer and insulate the cell 2311, thereby improving the reliability of the battery pack 2.

[0074] For example, the insulation panel 2312 is insulation foam.

[0075] Please refer to Figure 8, which is an exploded view of the battery pack 2 provided in an embodiment of this application. In one embodiment, the battery pack 2 further includes a temperature sensor 29 and an aerosol fire suppression device 214. One of the first BMS board 211 and the second BMS board 212 is connected to the temperature sensor 29 and the aerosol fire suppression device 214. The temperature sensor 29 is used to collect temperature information of the battery cell 2311. Thus, when thermal runaway occurs in the battery cell 2311, the temperature sensor 29 detects that the temperature has reached a threshold and activates the aerosol fire suppression device 214 to release aerosols for fire suppression and suppress the spread of thermal runaway.

[0076] Referring to Figure 7, the data acquisition assembly 24 includes an insulating bracket 241, a connecting strip 242, a data acquisition harness 243, and cable ties 2313. The connecting strip 242 is disposed on the insulating bracket 241. The cable ties 2313 fix the data acquisition harness 243 to the insulating bracket. One end of the data acquisition harness 243 is electrically connected to the connecting strip 242. The other end of a portion of the data acquisition harness 243 is electrically connected to the first BMS board 211, and the other end of another portion of the data acquisition harness 243 is electrically connected to the second BMS board 212. Multiple battery cells 2311 are electrically connected through multiple connecting strips 242.

[0077] Specifically, the insulating support 241 is a PC film. The PC film has openings for mates with components such as the connecting strip 242 and cable ties 2313. Double-sided adhesive is applied to the PC film to bond the connecting strip 242 to it. This improves the positional stability of the connecting strip 242 during the welding of the battery cell 2311 to the connecting strip 242, thereby improving the welding quality between the battery cell 2311 and the connecting strip 242. Additionally, the double-sided adhesive also secures the data acquisition cable bundle 243, ensuring neat and organized cable management.

[0078] Referring to Figure 8, in one embodiment, the battery pack 2 further includes a cover 26. The cover 26 closes onto the base plate 22 and encloses the battery module 23, the data acquisition component 24, the mounting bracket 1, the first BMS board 211, and the second BMS board 212. An inspection port 261 is provided on the side wall of the cover 26. A maintenance plate 262 is detachably installed within the inspection port 261. An explosion-proof valve 268 is installed on the maintenance plate 262.

[0079] Specifically, the access panel 261 is positioned opposite to electrical components such as the first BMS board 211, the second BMS board 212, the aerosol fire suppression system 214, and the fuse 213. When certain electrical components malfunction and need to be replaced, only the access panel 262 needs to be removed to install or remove the corresponding components, without having to open the entire cover 26. This improves maintenance convenience and reduces maintenance space.

[0080] Specifically, the cover 26 is made of metal. An insulating sheet 27 is provided between the battery module 23 and the cover 26. Specifically, the insulating sheet 27 is provided on the top and sides of the battery module 23. This improves the insulation between the electrical components inside the battery pack 2 and the cover 26.

[0081] In addition, the high-voltage output terminal, MSD, and external interface of the acquisition harness 243 of the battery module 23 are integrated onto the mounting plate 264. A mounting port 263 is provided on the side wall of the cover 26. The mounting plate 264 is detachably connected to the cover 26 by bolts and covers the mounting port 263. This makes wiring operations for the battery pack 2 convenient and maintenance simple.

[0082] Among them, sealing strips 265 are provided between the mounting plate 264 and the side wall of the cover 26, and between the inspection plate 262 and the side wall of the cover 26, to improve the sealing performance inside the battery pack 2, so that the battery pack 2 can meet the IP67 waterproof performance.

[0083] Referring to Figure 8, in one embodiment, a reinforcing structure 267 is provided at the portion of the cover 26 opposite to the base plate 22. This enhances the structural strength of the cover 26, thereby improving the structural strength of the battery pack 2.

[0084] Specifically, the top of the lid 26 is provided with an embossed shape to form reinforcing ribs.

[0085] In one embodiment, the base plate 22 is a liquid cooling plate. In this way, the battery pack 2 can be temperature managed by the liquid cooling plate, so that the temperature of the cell 2311 can be controlled by the liquid cooling plate during the charging and discharging process of the battery pack 2, so that the cell 2311 can operate in a temperature range with excellent efficiency.

[0086] Referring to Figure 7, in one embodiment, a buffer pad 28 is provided between the battery cell 2311 and the base plate 22. In this way, the bottom of the battery cell 2311 can be buffered by the buffer pad 28, and the insulation between the battery cell 2311 and the base plate 22 can be improved by the buffer pad 28, so as to improve the reliability of the battery cell 2311.

[0087] Specifically, the cushioning pad 28 is made of foam.

[0088] Among them, the buffer pad 28 is glued to the base plate 22.

[0089] Accordingly, this application embodiment also provides an electrical device, which includes the aforementioned battery pack 2, and the battery pack 2 supplies power to the electrical device.

[0090] Electrical equipment can include vehicles, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or pure electric cars; new energy vehicles can be pure electric cars, hybrid electric cars, or range-extended electric cars, etc.

[0091] In this embodiment, by employing the battery pack 2 provided in some embodiments of this application, the BMS board located on the first surface 121 can directly dissipate heat to the external environment, while the BMS board located within the mounting space 13 can dissipate heat through the heat dissipation vent 15. This improves the heat dissipation efficiency of the BMS board, thereby enhancing the accuracy of battery status monitoring and the reliability of its control functions. Ultimately, this improves the reliability of the electrical equipment.

Claims

1. A mounting bracket (1), comprising: First component (11); The second component (12) has a first surface (121) and a second surface (122) disposed opposite to each other. The first surface (121) is configured to mount a first BMS board (211). The second surface (122) is connected to the first component (11) to define an installation space (13), a connector (14) and a heat dissipation vent (15). The connector (14) and the heat dissipation vent (15) communicate the installation space (13) with the outside world. The installation space (13) is configured to mount a second BMS board (212).

2. The mounting bracket (1) according to claim 1, wherein, The second surface (122) is provided with a first groove (123), the first groove (123) is configured to be opposite to the second BMS plate (212), and the bottom wall of the first groove (123) is configured to be spaced apart from the second BMS plate (212).

3. The mounting bracket (1) according to claim 1, wherein, A through groove (124) is provided on the second component (12), the through groove (124) penetrating the first surface (121) and the second surface (122).

4. The mounting bracket (1) according to claim 3, wherein, The through groove (124) has a first slot (1241) located between the first surface (121) and the second surface (122), and the heat dissipation port (15) and the first slot (1241) are located at both ends of the second component (12).

5. The mounting bracket (1) according to any one of claims 1-4, wherein, The first component (11) is provided with heat dissipation holes (111), which are connected to the installation space (13).

6. The mounting bracket (1) according to any one of claims 1-5, wherein, The second surface (122) is provided with a first groove (123), and the first component (11) is provided with a second groove (112). The groove opening of the first groove (123) and the groove opening of the second groove (112) are interconnected to form the installation space (13). The plug-in port (14) is provided on the groove sidewall of the first groove (123) and / or the groove wall of the second groove (112). The heat dissipation port (15) is provided on the groove sidewall of the first groove (123) and / or the groove wall of the second groove (112).

7. The mounting bracket (1) according to any one of claims 1-6, wherein the mounting bracket (1) further comprises a first stud (113) and a first nut (114), one end of the first stud (113) being connected to the first member (11), and the other end being configured to pass through the first BMS plate (211) and be threadedly connected to the first nut (114); And / or, the mounting bracket (1) further includes a second stud (125) and a second nut (126), one end of the second stud (125) being connected to the second member (12), and the other end being configured to be threaded to the second nut (126) after passing through the second BMS plate (212).

8. The mounting bracket (1) according to any one of claims 1-7, wherein the mounting bracket (1) further comprises a third stud (16) and a third nut (17), one end of the third stud (16) being connected to one of the first member (11) and the second member (12), and the other end passing through the other and being threadedly connected to the third nut (17).

9. The mounting bracket (1) according to any one of claims 1-8, wherein, At least one of the first component (11) and the second component (12) has a wire hole (18) located near the insertion port (14).

10. A battery pack (2), comprising: Base plate (22); The battery module (23) includes multiple electrically connected cells (2311), the cells (2311) being disposed on the base plate (22); The acquisition component (24) is electrically connected to the battery module (23); The mounting bracket (1) as described in any one of claims 1-9, wherein the first component (11) is connected to the base plate (22); The first BMS board (211) and the second BMS board (212) are disposed on the first surface (121) and the second BMS board (212) are disposed in the mounting space (13). The first BMS board (211) and the second BMS board (212) are electrically connected to the acquisition component (24).

11. The battery pack (2) according to claim 10, wherein, The battery cell (2311) is a prismatic battery cell (2311), and the battery module (23) includes multiple battery cell columns (231), each of the battery cell columns (231) including multiple battery cells (2311) stacked sequentially; The battery pack (2) further includes a pressure sensor (25), which is disposed at one or both ends of the cell array (231) and is electrically connected to the first BMS board (211) and / or the second BMS board (212). And / or, A heat insulation plate (2312) is provided between two adjacent cells (2311).

12. The battery pack (2) according to claim 10 or 11, the battery pack (2) further includes a temperature sensor (29) and an aerosol fire suppression device (214), one of the first BMS board (211) and the second BMS board (212) is connected to the temperature sensor (29) and the aerosol fire suppression device (214), the temperature sensor (29) is used to collect the temperature information of the battery cell (2311); And / or, the acquisition component (24) includes an insulating bracket (241), a connecting strip (242), an acquisition harness (243), and cable ties (2313). The connecting strip (242) is disposed on the insulating bracket (241), and the cable ties (2313) fix the acquisition harness (243) to the insulating bracket (241). One end of the acquisition harness (243) is electrically connected to the connecting strip (242), the other end of a portion of the acquisition harness (243) is electrically connected to the first BMS board (211), and the other end of another portion of the acquisition harness (243) is electrically connected to the second BMS board (212). The plurality of said cells (2311) are electrically connected through the plurality of said connecting bars (242).

13. The battery pack (2) according to any one of claims 10-12, the battery pack (2) further includes a cover (26), the cover (26) covering the bottom plate (22) and enclosing the battery module (23), the acquisition component (24), the mounting bracket (1), the first BMS board (211) and the second BMS board (212); in, An inspection port (261) is provided on the side wall of the box cover (26), and an inspection plate (262) is detachably installed inside the inspection port (261). An explosion-proof valve (268) is installed on the inspection plate (262). And / or, the portion of the box cover (26) opposite to the bottom plate (22) is provided with a reinforcing structure (267).

14. The battery pack (2) according to any one of claims 10-13, wherein, The base plate (22) is a liquid-cooled plate; And / or, a buffer pad (28) is provided between the battery cell (2311) and the base plate (22).

15. An electrical appliance comprising a battery pack (2) as claimed in any one of claims 10-14.

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