Mounting bracket, battery pack and electric equipment

Abstract

The utility model provides a mounting bracket, a battery pack and electric equipment, and relates to the technical field of batteries. The mounting bracket comprises a first component and a second component; the second component is provided with a first surface and a second surface which are arranged back to back, the first surface is configured to install a first BMS board, the second surface is connected with the first component to define an installation space, a wire plugging port and a heat dissipation port, the wire plugging port and the heat dissipation port communicate the installation space with the outside, and the installation space is configured to install a second BMS board. According to the application, the first component and the second component are arranged to define the mounting space and the heat dissipation opening for communicating the mounting space with the outside, so that the BMS board located on the first surface can directly dissipate heat to the external environment, and the BMS board located in the mounting space can dissipate heat through the heat dissipation opening. In this way, the heat dissipation efficiency of the BMS board can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a mounting bracket, a battery pack and an electrical equipment. BACKGROUND

[0002] The battery pack comprises a box body, a battery module arranged in the box body, and a BMS (Battery Management System) board. The battery module comprises a plurality of electrically connected battery cells. The BMS board is electrically connected to the battery module through a collection assembly. The collection assembly is configured to transmit temperature signals and voltage signals of the battery cells to the BMS board.

[0003] In the related art, in order to improve the monitoring accuracy, monitoring efficiency and reliability of the working information of the battery pack, a plurality of BMS boards are configured for the battery pack. The plurality of BMS boards are fixed on the bottom plate of the battery pack through the mounting bracket. The plurality of BMS boards are arranged in sequence in a direction away from the battery cells. Since the BMS board has a plurality of electronic components that generate heat, such as microcontrollers, power transistors, operational amplifiers, etc. These heat-generating electronic components can cause the working temperature of the BMS board to rise. As a result, the heat dissipation efficiency of the BMS board, especially the BMS board close to the battery cells, is poor. This reduces the accuracy of the battery state monitoring and the reliability of the control function of the BMS board.

[0004] Therefore, how to improve the heat dissipation efficiency of the mounting bracket with a plurality of BMS boards is a problem to be solved by the present application. Invention content

[0005] The present application provides a mounting bracket, a battery pack and an electrical equipment, which can improve the heat dissipation efficiency of the mounting bracket with a plurality of BMS boards.

[0006] In a first aspect, the present application provides a mounting bracket, which comprises a first component and a second component. The second component has a first surface and a second surface arranged opposite to each other. The first surface is configured to mount a first BMS board. The second surface is connected to the first component to define a mounting space, a wire insertion port and a heat dissipation port. The wire insertion port and the heat dissipation port are in communication with the outside of the mounting space. The mounting space is configured to mount a second BMS board.

[0007] In an embodiment, the second surface is provided with a first recess. The first recess is configured to be arranged opposite to the second BMS board. The bottom wall of the first recess is configured to be spaced apart from the second BMS board.

[0008] In an embodiment, a through slot is arranged on the second component. The through slot penetrates the first surface and the second surface.

[0009] In an embodiment, the through slot has a slot opening A between the first surface and the second surface, and the heat dissipation opening and the slot opening A are located at two ends of the second member respectively.

[0010] In an embodiment, the first member is provided with a heat dissipation hole, and the heat dissipation hole is in communication with the mounting space.

[0011] In an embodiment, the second surface is provided with a first recess, and the first member is provided with a second recess, the slot opening of the first recess and the slot opening of the second recess are in communication with each other to form the mounting space, the wire insertion opening is arranged on the slot side wall of the first recess and / or the slot wall of the second recess, and the heat dissipation opening is arranged on the slot side wall of the first recess and / or the slot wall of the second recess.

[0012] In an embodiment, the mounting bracket further comprises a first stud and a first nut, one end of the first stud is connected with the first member, and the other end is configured to pass through the first BMS plate and be threadedly connected with the first nut; and / or, the mounting bracket further comprises a second stud and a second nut, one end of the second stud is connected with the second member, and the other end is configured to pass through the second BMS plate and be threadedly connected with the second nut.

[0013] In an embodiment, the mounting bracket further comprises a third stud and a third nut, one end of the third stud is connected with one of the first member and the second member, and the other end passes through the other one and is threadedly connected with the third nut.

[0014] In an embodiment, at least one of the first member and the second member is provided with a wire passing hole adjacent to the part of the wire insertion opening.

[0015] In a second aspect, the application provides a battery pack, comprising a bottom plate, a battery module, an acquisition assembly, a first BMS plate, a second BMS plate, and the aforementioned mounting bracket; the battery module comprises a plurality of electrically connected battery cells, and the battery cells are arranged on the bottom plate; the acquisition assembly is electrically connected with the battery module; the first member is connected with the bottom plate; the first BMS plate is arranged on the first surface, and the second BMS plate is arranged in the mounting space; the first BMS plate and the second BMS plate are electrically connected with the acquisition assembly.

[0016] In an embodiment, the battery cell is a square shell battery cell, the battery module comprises a plurality of battery cell columns, each battery cell column comprises a plurality of battery cells arranged in sequence, and the battery pack further comprises a pressure sensor arranged at one end or both ends of the battery cell column, the pressure sensor is electrically connected with the first BMS plate and / or the second BMS plate; and / or, a heat insulation plate is arranged between adjacent two battery cells.

[0017] In an embodiment, the battery pack further comprises a temperature sensor and an aerosol fire extinguishing device, one of the first BMS board and the second BMS board is connected with the temperature sensor and the aerosol fire extinguishing device, the temperature sensor is used to collect temperature information of the battery cells; and / or, the collection assembly comprises an insulating support, a connecting row, a collection wire harness and a cable tie, the connecting row is arranged on the insulating support, the cable tie is used to fix the collection wire harness on the insulating support, one end of the collection wire harness is electrically connected with the connecting row, one end of a part of the collection wire harness is electrically connected with the first BMS board, and one end of another part of the collection wire harness is electrically connected with the second BMS board, wherein the plurality of battery cells are electrically connected through the plurality of connecting rows.

[0018] In an embodiment, the battery pack further comprises a box cover, the box cover covers the bottom plate and covers the battery module, the collection assembly, the mounting support, the first BMS board and the second BMS board inside; wherein a maintenance opening is arranged on a side wall of the box cover, a maintenance plate is detachably arranged in the maintenance opening, and an explosion-proof valve is arranged on the maintenance plate; and / or a reinforcing structure is arranged at a position opposite to the bottom plate of the box cover.

[0019] In an embodiment, the bottom plate is a liquid cooling plate; and / or a buffer pad is arranged between the battery cells and the bottom plate.

[0020] In a third aspect, the application provides a power utilization device, which comprises the battery pack as described above.

[0021] The beneficial effects of the embodiments of the application are as follows:

[0022] In the embodiments of the application, the first member and the second member are arranged to define the mounting space and the heat dissipation opening for communicating the mounting space with the outside, so that the BMS board on the first surface can directly dissipate heat to the external environment, and the BMS board in the mounting space can dissipate heat through the heat dissipation opening. In this way, the heat dissipation efficiency of the BMS board can be improved, so that the accuracy of the battery state monitoring and the reliability of the control function of the BMS board can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0024] Figure 1 is a structural schematic view of the mounting support provided by the embodiments of the application;

[0025] Figure 2 is a structural schematic view of the battery pack provided by the embodiments of the application; Figure 1 is a sectional view of A-A in

[0026] Figure 3 is a schematic view of the mounting bracket cooperating with the first BMS plate and the second BMS plate provided by an embodiment of the present application;

[0027] Figure 4 is a structural schematic view of the second member provided by an embodiment of the present application;

[0028] Figure 5 is a structural schematic view of the first member provided by an embodiment of the present application;

[0029] Figure 6 is a structural schematic view of the battery pack provided by an embodiment of the present application;

[0030] Figure 7 is an exploded view of part of the components of the battery pack provided by an embodiment of the present application;

[0031] Figure 8 is an exploded view of the battery pack provided by an embodiment of the present application.

[0032] Legend of reference signs:

[0033] 1 - mounting bracket;

[0034] 11 - first member; 111 - heat dissipation hole; 112 - second groove; 113 - first stud; 114 - first nut;

[0035] 12 - second member; 121 - first surface; 122 - second surface; 123 - first groove; 124 - through slot; 1241 - notch A; 125 - second stud; 126 - second nut;

[0036] 13 - mounting space; 14 - wire insertion port; 15 - heat dissipation port; 16 - third stud; 17 - third nut; 18 - wire hole;

[0037] 2 - battery pack; 211 - first BMS plate; 212 - second BMS plate; 213 - fuse; 214 - aerosol fire extinguishing device; 22 - bottom plate; 23 - battery module; 231 - cell column; 2311 - cell; 2312 - heat insulation plate; 2313 - cable tie; 2314 - end plate;

[0038] 24 - collection assembly; 241 - insulating support; 242 - connecting row; 243 - collection wire harness;

[0039] 25 - pressure sensor; 251 - pressure diaphragm;

[0040] 26 - box cover; 261 - access port; 262 - access plate; 263 - mounting port; 264 - mounting plate; 265 - sealing strip; 267 - reinforcing structure; 268 - explosion-proof valve;

[0041] 27 - insulation sheet; 28 - cushioning pad;

[0042] 29 - temperature sensor. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] And the term "including", "containing" or any other variant thereof is intended to cover non-exclusive containing, so that the product including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such product.

[0046] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a mounting bracket 1 provided by the embodiments of the present application, Figure 2 is Figure 1 A-A cross-sectional view. The embodiments of the present application provide a mounting bracket 1. The mounting bracket 1 includes a first member 11 and a second member 12. The second member 12 has a first surface 121 and a second surface 122 arranged opposite to each other. The first surface 121 is configured to mount a first BMS board 211. The second surface 122 is connected with the first member 11 to define a mounting space 13, a wire insertion port 14 and a heat dissipation port 15. The wire insertion port 14 and the heat dissipation port 15 communicate the mounting space 13 with the outside. The mounting space 13 is configured to mount a second BMS board 212.

[0047] It can be understood that the first BMS board 211 can be fixed on the first member 11 by screw fasteners, can be glued to the first member 11, or can be clamped to the first member 11. The second BMS board 212 can be fixed in the mounting space 13 in the same way as the first BMS board 211 is fixed on the first member 11, or can be fixed in a different way.

[0048] It can be understood that the wire harness is electrically connected with the second BMS board 212 through the wire insertion port 14.

[0049] It can be understood that the wire insertion port 14 can be arranged adjacent to the heat dissipation port 15, or can be arranged at two ends of the second member 12 respectively.

[0050] It can be understood that the first member 11 can be connected with the second member 12 by screw fasteners, or can be glued or clamped with the second member 12.

[0051] In use, the first BMS board 211 is fixed on 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 view of the mounting bracket 1 cooperating with the first BMS board 211 and the second BMS board 212 according to the embodiment of the application. The second BMS board 212 is located between the first BMS board 211 and the battery cell 2311. The first member 11 is fixed on the bottom plate 22 of the battery pack 2. A part of the wire harness of the battery pack 2 is electrically connected with the first BMS board 211, and another part of the wire harness of the battery pack 2 is electrically connected with the second BMS board 212.

[0052] In 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 mounting space 13 and the heat dissipation port 15.

[0053] In the embodiment, by arranging the first member 11 and the second member 12 to define the mounting space 13 and the heat dissipation port 15 which communicates the mounting space 13 with the external environment, the BMS board located on the first surface 121 can directly dissipate heat to the external environment, and the BMS board located in the mounting space 13 can dissipate heat through the heat dissipation port 15. In this way, the heat dissipation efficiency of the BMS board can be improved, thereby the accuracy of monitoring the state of the battery and the reliability of the control function of the BMS board can be improved.

[0054] In addition, by the above scheme, not only the control efficiency and the controllable stability of the battery pack 2 can be improved, but also the first BMS board 211 and the second BMS board 212 can be separated from each other to reduce the influence of each other.

[0055] Please refer to Figure 2 and Figure 3In an embodiment, the second surface 122 is provided with a first recess 123. The first recess 123 is configured to be oppositely arranged with the second BMS plate 212, and a bottom wall of the first recess 123 is configured to be spaced apart from the second BMS plate 212. In this way, an air flow space can be formed between the bottom wall of the first recess 123 and the second BMS plate 212, so that the heat dissipation area and the heat dissipation path of the second BMS plate 212 located in the installation space 13 can be increased through the space, thereby improving the heat dissipation efficiency of the BMS plate.

[0056] Specifically, the middle part of the second member 12 is concave in a direction away from the first member 11 to form the first recess 123. In this way, the thickness of the second member 12 can be more uniform to improve its stress state, thereby avoiding stress concentration.

[0057] Please refer to Figure 4 , Figure 4 is a structural schematic diagram of the second member 12 provided by an embodiment of the present application. In an embodiment, the second member 12 is provided with a through slot 124. The through slot 124 penetrates the first surface 121 and the second surface 122.

[0058] It can be understood that the slot opening of the through slot 124 is in communication with the outside.

[0059] In the present embodiment, by providing the through slot 124, on the one hand, the heat dissipation area of the first BMS plate 211 mounted on the first surface 121 can be increased, thereby improving the heat dissipation efficiency of the first BMS plate 211; on the other hand, the installation space 13 can be communicated with the outside through the through slot 124, thereby increasing the heat dissipation path of the installation space 13 to improve the heat dissipation efficiency of the second BMS plate 212 located in the installation space 13.

[0060] Please refer to Figure 2 In an embodiment, the through slot 124 has a slot opening A1241 located between the first surface 121 and the second surface 122, and the heat dissipation port 15 and the slot opening A1241 are respectively located at two ends of the second member 12. In this way, the air flow flowing to the heat dissipation port 15 and the slot opening of the through slot 124 respectively can be prevented from interfering with each other, thereby improving the smoothness of the air flow circulation of the installation space 13 to facilitate improving the heat dissipation efficiency of the BMS plate.

[0061] Please refer to Figure 5 , Figure 5 is a structural schematic diagram of the first member 11 provided by an embodiment of the present application. In an embodiment, the first member 11 is provided with a heat dissipation hole 111, and the heat dissipation hole 111 is in communication with the installation space 13. In this way, the area of the installation space 13 in communication with the outside can be increased to facilitate improving the heat dissipation efficiency of the second BMS plate 212 located in the installation space 13.

[0062] Please refer toFigure 2 In an embodiment, the second surface 122 is provided with a first groove 123. The first member 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 in communication with each other to form a mounting space 13. The wire insertion opening 14 is arranged on the groove side wall of the first groove 123 and / or the groove wall of the second groove 112. The heat dissipation opening 15 is arranged on the groove side wall of the first groove 123 and / or the groove wall of the second groove 112.

[0063] It can be understood that the wire insertion opening 14 can be arranged on the groove side wall of the first groove 123, or on the groove wall of the second groove 112, or part of the wire insertion opening 14 is arranged on the groove side wall of the first groove 123 and part of the wire insertion opening 14 is arranged on the groove wall of the second groove 112.

[0064] It can be understood that the heat dissipation opening 15 can be arranged on the groove side wall of the first groove 123, or on the groove wall of the second groove 112, or part of the heat dissipation opening 15 is arranged on the groove side wall of the first groove 123 and part of the heat dissipation opening 15 is arranged on the groove wall of the second groove 112.

[0065] Specifically, one side edge of the second member 12 is arranged in a spaced manner with the groove wall adjacent thereto of the second groove 112 to form the heat dissipation opening 15. One side groove wall of the second groove 112 is provided with an opening to form the wire insertion opening 14.

[0066] It can be understood that one end of the second BMS plate 212 is located in the first groove 123 and the other end is located in the second groove 112.

[0067] In the embodiment, through the above arrangement, the mounting space 13 can be formed, and the depth dimension of the groove in any of the first member 11 and the second member 12 for cooperating with the second BMS plate 212 can be avoided to be too large, so that the structural rigidity of the first member 11 and the second member 12 can be effectively guaranteed, and the structural stability of the mounting bracket 1 for installing the BMS plate can be improved.

[0068] Please refer to Figure 1 In an embodiment, the mounting bracket 1 further comprises a first stud 113 and a first nut 114. One end of the first stud 113 is connected with the first member 11, and the other end is configured to be screwed with the first nut 114 after passing through the first BMS plate 211. And / or, the mounting bracket 1 further comprises a second stud 125 and a second nut 126. One end of the second stud 125 is connected with the second member 12, and the other end is configured to be screwed with the second nut 126 after passing through the second BMS plate 212.

[0069] Specifically, the mounting bracket 1 further comprises a first stud 113 and a first nut 114, one end of the first stud 113 is connected with the first member 11, and the other end is configured to pass through the first BMS plate 211 and be screwed with the first nut 114; or, the mounting bracket 1 further comprises a second stud 125 and a second nut 126, one end of the second stud 125 is connected with the second member 12, and the other end is configured to pass through the second BMS plate 212 and be screwed with the second nut 126; or, the mounting bracket 1 further comprises a first stud 113 and a first nut 114, one end of the first stud 113 is connected with the first member 11, and the other end is configured to pass through the first BMS plate 211 and be screwed with the first nut 114; and, the mounting bracket 1 further comprises a second stud 125 and a second nut 126, one end of the second stud 125 is connected with the second member 12, and the other end is configured to pass through the second BMS plate 212 and be screwed with the second nut 126.

[0070] Specifically, the first stud 113 and the second stud 125 are both press-in studs. The first stud 113 is press-in fixed on the first member 11. The second stud 125 is press-in fixed on the second member 12.

[0071] It can be understood that the first stud 113 is screwed with the first nut 114 after passing through the bolt via hole on the shell of the first BMS plate 211. The second stud 125 is screwed with the second nut 126 after passing through the bolt via hole on the shell of the second BMS plate 212.

[0072] In the embodiment, through the above setting, the first BMS plate 211 and the second BMS plate 212 can be detachably fixed on the mounting bracket 1, so as to facilitate the convenience of maintenance and the replaceability of each BMS plate.

[0073] Please refer to Figure 1 In an embodiment, the mounting bracket 1 further comprises a third stud 16 and a third nut 17. One end of the third stud 16 is connected with one of the first member 11 and the second member 12, and the other end passes through the other and is screwed with the third nut 17.

[0074] Specifically, one end of the third stud 16 is connected with the first member 11, and the other end passes through the second member 12 and is screwed with the third nut 17.

[0075] In the embodiment, through the above setting, the first member 11 and the second member 12 can be detachably connected. In this way, not only is it convenient to install multiple BMS plates on the mounting bracket 1, but also the convenience of maintenance is improved.

[0076] Please refer to Figure 1In an embodiment, the at least one of the first member 11 and the second member 12 is provided with the threading hole 18 adjacent to the part of the wire insertion port 14.

[0077] Specifically, when the second member 12 is provided with the through slot 124 and the wire insertion port 14 is in communication with the slot of the through slot 124, the threading hole 18 is provided on the first member 11.

[0078] It can be understood that the wire harness 243 is plugged with the wire harness interface of the BMS board. In order to improve the fixation of the wire harness and avoid the disorder of the wire harness laying, the cable tie 2313 can be configured to bind the wire harness. At the same time, the cable tie 2313 can be threaded on the threading hole 18 to improve the fixation of the wire harness and avoid the shaking of the wire harness due to vibration.

[0079] Please refer to Figures 1-6 , Figure 6 is a structural schematic diagram of a battery pack 2 provided by an embodiment of the present application. Accordingly, the embodiment of the present application further provides a battery pack 2, which comprises a bottom plate 22, a battery module 23, a collection assembly 24, a first BMS board 211, a second BMS board 212, and the aforementioned mounting bracket 1. The battery module 23 comprises a plurality of electrically connected battery cells 2311. The battery cells 2311 are arranged on the bottom plate 22. The collection assembly 24 is electrically connected with the battery module 23. The first member 11 is connected with the bottom plate 22. The first BMS board 211 is arranged on the first surface 121. The second BMS board 212 is arranged in the mounting space 13. The first BMS board 211 and the second BMS board 212 are electrically connected with the collection assembly 24.

[0080] It can be understood that the plurality of battery cells 2311 are connected in series or in parallel, or a part of the battery cells 2311 are connected in parallel and another part of the battery cells 2311 are connected in series.

[0081] It can be understood that the battery pack 2 can further comprise a liquid cooling plate, a box cover 26, and the like.

[0082] It can be understood that the battery pack 2 can further comprise a fuse 213, a MSD (Manual Service Disconnect), and a high-voltage socket. These connected electrical components form a current loop through the copper bars.

[0083] Exemplarily, the battery module 23 comprises four battery cell columns 231, and each battery cell column 231 comprises 13 battery cells 2311. The 13 battery cells 2311 in each battery cell column 231 are arranged in sequence to form the battery cell column 231. The plurality of battery cells 2311 in each battery cell column 231 are connected in series through aluminum bars. The battery cell columns 231 are connected with each other through copper bars. Specifically, the four battery cell columns 231 are connected in series through the plurality of copper bars. The copper bars are connected with the corresponding aluminum bars through bolts to realize the interlocking fixation of the copper bars and the aluminum bars. In this way, the battery pack 2 can perform large-power charging and discharging.

[0084] In the embodiment, by using the mounting bracket 1 provided by some embodiments of the application, the BMS board located on the first surface 121 can directly dissipate heat to the external environment, and the BMS board located in the mounting space 13 can dissipate heat through the heat dissipation port 15. In this way, the heat dissipation efficiency of the BMS board can be improved, thereby facilitating the improvement of the accuracy of the battery state monitoring and the reliability of the control function of the BMS board.

[0085] Please refer to Figure 7 , Figure 7 is a partial component explosion diagram of the battery pack 2 provided by the embodiments of the application. In an embodiment, the battery cell 2311 is a square shell battery cell 2311. The battery module 23 includes a plurality of battery cell columns 231. Each battery cell column 231 includes a plurality of battery cells 2311 arranged in sequence. Among them, the battery pack 2 further includes a pressure sensor 25. The pressure sensor 25 is arranged at one end or both ends of the battery cell column 231. The pressure sensor 25 is electrically connected with the first BMS board 211 and / or the second BMS board 212.

[0086] It can be understood that an end plate 2314 is arranged at both ends of each battery cell column 231. The battery cells 2311 and the end plates 2314 of each battery cell column 231 are bound together by a tie 2313. The tie 2313 can be a plastic tie 2313 or a steel tie. The tie 2313 can be one or more.

[0087] Specifically, the pressure sensor 25 includes two pressure diaphragms 251, which are respectively located at both ends of the battery cell column 231. The pressure diaphragm 251 is covered with a pressure collection end. Each pressure diaphragm 251 is connected to a collector through an extension detection belt. The collector transmits data to the first BMS board 211 or the second BMS board 212. When the pressure information collected by the pressure sensor 25 reaches a threshold value, a related alarm action is triggered.

[0088] When the battery pack 2 includes a plurality of battery cell columns 231, a pressure sensor 25 can be configured for each battery cell column 231. If limited by the space of the battery pack 2, a pressure sensor 25 can be selectively configured for one of the battery cell columns 231.

[0089] In the embodiment, by arranging the pressure sensor 25, the extrusion force received by the battery cell 2311 can be detected, which facilitates the monitoring of the working state of the battery cell 2311 and improves the safety of the battery pack 2.

[0090] Please refer to Figure 7In an embodiment, the electric cell 2311 is a square shell electric cell 2311. The battery module 23 includes a plurality of electric cell columns 231. Each electric cell column 231 includes a plurality of electric cells 2311 arranged in sequence. A heat insulation plate 2312 is arranged between two adjacent electric cells 2311. In this way, the heat insulation plate 2312 can prevent the spread of heat when the electric cell 2311 is out of control, and the heat insulation plate 2312 can also buffer and insulate the electric cell 2311, so as to improve the reliability of the battery pack 2.

[0091] Exemplarily, the heat insulation plate 2312 is heat insulation foam.

[0092] Please refer to Figure 8 , Figure 8 is an exploded view of the battery pack 2 provided by an embodiment of the present application. In an embodiment, the battery pack 2 further includes a temperature sensor 29 and an aerosol fire extinguishing device 214. One of the first BMS board 211 and the second BMS board 212 is connected with the temperature sensor 29 and the aerosol fire extinguishing device 214. The temperature sensor 29 is used to collect temperature information of the electric cell 2311. In this way, when the electric cell 2311 is out of control, the temperature sensor 29 can detect that the temperature reaches a threshold value, and the aerosol fire extinguishing device 214 can be started to release aerosol for fire extinguishing and to suppress the spread of the out-of-control.

[0093] Please refer to Figure 7 , the collection assembly 24 includes an insulating support 241, a connection row 242, a collection wire harness 243, and a cable tie 2313. The connection row 242 is arranged on the insulating support 241. The cable tie 2313 fixes the collection wire harness 243 to the insulating support. One end of the collection wire harness 243 is electrically connected with the connection row 242. One end of a part of the collection wire harness 243 is electrically connected with the first BMS board 211, and the other end of the other part of the collection wire harness 243 is electrically connected with the second BMS board 212. The plurality of electric cells 2311 are electrically connected through the plurality of connection rows 242.

[0094] Specifically, the insulating support 241 is a PC film. The PC film has openings matched with the connection row 242, the cable tie 2313, and the like. The PC film is provided with double-sided adhesive tape to glue the connection row 242 on the PC film. In this way, the position stability of the connection row 242 can be improved when the electric cell 2311 is welded with the connection row 242, so as to improve the welding quality between the electric cell 2311 and the connection row 242. In addition, the double-sided adhesive tape can also fix the collection wire harness 243, so that the collection wire harness 243 is neatly arranged.

[0095] Please refer to Figure 8In an embodiment, the battery pack 2 further comprises a box cover 26. The box cover 26 covers the bottom plate 22 and encloses the battery module 23, the collection assembly 24, the mounting bracket 1, the first BMS plate 211 and the second BMS plate 212. A maintenance opening 261 is arranged on the sidewall of the box cover 26. A maintenance plate 262 is detachably arranged in the maintenance opening 261. An explosion-proof valve 268 is arranged on the maintenance plate 262.

[0096] Specifically, the maintenance opening 261 is arranged opposite to the electrical components such as the first BMS plate 211, the second BMS plate 212, the aerosol fire extinguishing device 214 and the fuse 213. When some electrical components need to be replaced due to failure or the like, the corresponding electrical components can be disassembled by detaching the maintenance plate 262, without the need to detach the entire box cover 26, thereby improving the convenience of maintenance and reducing the maintenance space.

[0097] Specifically, the box cover 26 is a metal component. An insulating sheet 27 is arranged between the battery module 23 and the box cover 26. Specifically, the insulating sheet 27 is arranged above the battery module 23 and on the side of the battery module 23. In this way, the insulation between the electrical components in the battery pack 2 and the box cover 26 can be improved.

[0098] In addition, the high-voltage output end of the battery module 23, the MSD and the external interface of the collection wire harness 243 are integrated on the mounting plate 264. A mounting opening 263 is arranged on the sidewall of the box cover 26. The mounting plate 264 is detachably connected to the box cover 26 by bolts and covers the mounting opening 263. In this way, the wiring operation of the battery pack 2 is convenient and the maintenance is simple.

[0099] Specifically, the box cover 26 is a metal component. An insulating sheet 27 is arranged between the battery module 23 and the box cover 26. Specifically, the insulating sheet 27 is arranged above the battery module 23 and on the side of the battery module 23. In this way, the insulation between the electrical components in the battery pack 2 and the box cover 26 can be improved.

[0100] Please refer to Figure 8 In an embodiment, the part opposite to the bottom plate 22 of the box cover 26 is provided with a reinforcing structure 267. In this way, the structural strength of the box cover 26 can be improved to enhance the structural strength of the battery pack 2.

[0101] Specifically, the top of the box cover 26 is provided with an embossed shape to form a reinforcing rib.

[0102] In an embodiment, the bottom 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 battery cell 2311 can be controlled by the liquid cooling plate during the charging and discharging process of the battery pack 2, so that the battery cell 2311 can work in an excellent temperature range.

[0103] Please refer to Figure 7In an embodiment, a buffer pad 28 is arranged between the battery cell 2311 and the bottom 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 bottom plate 22 can be improved by the buffer pad 28, so as to improve the reliability of the battery cell 2311.

[0104] Specifically, the buffer pad 28 is a foam.

[0105] The buffer pad 28 is glued to the bottom plate 22.

[0106] Correspondingly, the embodiments of the present application also provide a use electric device, which comprises the battery pack 2 described above, and the battery pack 2 is used to supply power for the use electric device.

[0107] The use electric device can be a vehicle, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a pure electric automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc.

[0108] In the embodiment, by using the battery pack 2 provided by some embodiments of the present application, the BMS board located on the first surface 121 can directly dissipate heat to the external environment, and the BMS board located in the mounting space 13 can dissipate heat through the heat dissipation port 15. In this way, the heat dissipation efficiency of the BMS board can be improved, so as to improve the accuracy of the battery state monitoring and the reliability of the control function of the BMS board. Finally, the reliability of the use electric device can be improved.

[0109] The embodiments of the present application are described in detail above, and the specific examples are applied to the principles and implementation modes of the present application. The above embodiment descriptions are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A mounting bracket, characterized by The installation support comprises: a first component; a second component having a first surface and a second surface arranged oppositely, the first surface is configured to mount a first BMS board, and the second surface is connected with the first component to define a mounting space, a wire port and a heat dissipation port, the wire port and the heat dissipation port are connected with the outside of the mounting space, and the mounting space is configured to mount a second BMS board.

2. The mounting bracket of claim 1, wherein The second surface is provided with a first groove, the first groove is configured to be arranged oppositely with the second BMS board, and the groove bottom wall of the first groove is configured to be arranged spacedly with the second BMS board.

3. The mounting bracket of claim 1, wherein A through groove is arranged on the second component, and the through groove penetrates the first surface and the second surface.

4. The mounting bracket of claim 3, wherein The through groove has a groove opening A between the first surface and the second surface, and the heat dissipation port and the groove opening A are respectively located at two ends of the second component.

5. The mounting bracket of any one of claims 1-4, wherein, The first component is provided with a heat dissipation hole, and the heat dissipation hole is connected with the mounting space.

6. The mounting bracket of any one of claims 1-4, wherein, The second surface is provided with a first groove, and the first component is provided with a second groove, the groove opening of the first groove and the groove opening of the second groove are connected with each other to form the mounting space, the wire port is arranged on the groove side wall of the first groove and / or the groove wall of the second groove, and the heat dissipation port is arranged on the groove side wall of the first groove and / or the groove wall of the second groove.

7. The mounting bracket of any one of claims 1-4, wherein, The installation support further comprises a first stud and a first nut, one end of the first stud is connected with the first component, and the other end is configured to be threadedly connected with the first nut after penetrating the first BMS board. And / or, the installation support further comprises a second stud and a second nut, one end of the second stud is connected with the second component, and the other end is configured to be threadedly connected with the second nut after penetrating the second BMS board.

8. The mounting bracket of any one of claims 1-4, wherein, The installation support further comprises a third stud and a third nut, one end of the third stud is connected with one of the first component and the second component, and the other end is threadedly connected with the third nut after penetrating the other one.

9. The mounting bracket of any one of claims 1-4, wherein, At least one of the first component and the second component is provided with a wire hole adjacent to the wire port.

10. A battery pack, characterized by, The installation support comprises: a bottom plate; a battery module comprising a plurality of electrically connected battery cells, the battery cells being arranged on the bottom plate; a collection assembly electrically connected with the battery module; the first component is connected with the bottom plate; and a first BMS board and a second BMS board, the first BMS board is arranged on the first surface, and the second BMS board is arranged in the mounting space, and the first BMS board and the second BMS board are electrically connected with the collection assembly.

11. The battery pack of claim 10, wherein, The battery cells are square shell battery cells, and the battery module comprises a plurality of battery cell columns, each of which comprises a plurality of battery cells arranged in sequence. The battery pack further comprises a pressure sensor arranged at one end or both ends of the battery cell column, and the pressure sensor is electrically connected with the first BMS board and / or the second BMS board. And / or, A heat insulation plate is arranged between adjacent two battery cells.

12. The battery pack of claim 10, wherein, The battery pack further comprises a temperature sensor and an aerosol fire extinguishing device, one of the first BMS board and the second BMS board is connected with the temperature sensor and the aerosol fire extinguishing device, and the temperature sensor is used to collect temperature information of the battery cells; And / or, the collection assembly comprises an insulating support, a connecting row, a collection wire harness and a cable tie, the connecting row is arranged on the insulating support, the cable tie is used to fix the collection wire harness on the insulating support, one end of the collection wire harness is electrically connected with the connecting row, one end of a part of the collection wire harness is electrically connected with the first BMS board, and the other end of another part of the collection wire harness is electrically connected with the second BMS board, wherein a plurality of the battery cells are electrically connected through a plurality of the connecting rows.

13. The battery pack of claim 10, wherein, The battery pack further comprises a box cover, the box cover covers the bottom plate and covers the battery module, the collection assembly, the mounting support, the first BMS board and the second BMS board inside; Wherein, a maintenance opening is arranged on the side wall of the box cover, a maintenance plate is detachably installed in the maintenance opening, and an explosion-proof valve is installed on the maintenance plate; And / or, a reinforcing structure is arranged at the part opposite to the bottom plate of the box cover.

14. The battery pack of any one of claims 10-13, wherein, The bottom plate is a liquid cooling plate; And / or, a buffer pad is arranged between the battery cell and the bottom plate.

15. An electrical device, characterized by The battery pack comprises the battery pack according to any one of claims 10-14. The battery pack comprises the battery pack according to any one of claims 10-14.

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