Battery module and soft package pack epoxy plate support connecting structure for mounting the battery module

Abstract

The utility model provides a battery module and install the soft package PACK epoxy board support connecting structure of this battery module, belong to the battery technical field. The utility model discloses soft package electric core all includes electric core body and with the positive pole lug and negative pole lug of electric core body connection, and the positive pole lug and negative pole lug pass through the corresponding in -through slot of setting with the positive pole lug and negative pole lug on the epoxy board confluence support frame and are connected with aluminium row assembly, and aluminium row assembly is fixed on the upper surface of epoxy board confluence support frame, and the upper surface of aluminium row assembly is provided with nickel sheet, and nickel sheet is fixedly connected with the one end of collection line, and the other end of collection line is fixedly connected with BMS, and BMS is fixed on the sheet metal support, and the electric core group is fixed in the sheet metal support. The utility model sets up the corresponding in -through slot according to the soft package electric core series parallel connection quantity on the epoxy board confluence support frame, and the aluminium row assembly is fixed through the epoxy board confluence support frame with plastic rivet, reduces the production cost, adopts the sheet metal support support, and the structural strength has been increased.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery module and a soft-pack PACK epoxy board bracket connection structure for mounting the battery module. Background Technology

[0002] Currently, the battery cells used in the industry are mainly pouch cells, aluminum-cased cells, or steel-cased cells. Among them, pouch cells have a relatively soft aluminum-plastic film outer shell, while aluminum-cased and steel-cased cells have a relatively hard metallic outer shell. Because aluminum-cased and steel-cased cells have a certain degree of structural strength, their packing configurations are relatively simple. However, pouch cells have limited structural strength, making protection and strengthening of the pouch structure particularly important. Therefore, the industry is increasingly researching pouch cells.

[0003] Currently, the industry primarily uses PCBs (Printed Circuit Boards) to connect the positive and negative tabs of individual cells in series and parallel connections of pouch cells. The PCB is pre-installed on a support substrate using tin plating or gold plating processes, incorporating copper busbars, thermistors, circuitry, and electronic components, and is ultimately protected with conformal coating. However, this process is not only complex and costly, but the conformal coating is also easily damaged during manufacturing, leading to short circuits, insufficient voltage withstand capability, and consequently, increased safety risks.

[0004] Besides the connection issues of the positive and negative tabs in the series and parallel connection of pouch cells, the strength of the pouch structure is particularly important. Currently, whether used in two-wheeled vehicles, three-wheeled vehicles, or start-stop systems, pouch packs must meet the structural strength requirements of enterprise standards, industry standards, and domestic and international standards. These standards typically cover various operating conditions such as vibration, impact, drop, collision, compression, and random vibration. However, existing pouch structures suffer from complex manufacturing processes and high-cost production materials, failing to meet the required application needs. Summary of the Invention

[0005] In view of the technical problems of connecting the positive and negative tabs of a single cell to a PCB in the existing technology, such as complex process, high cost, and easy damage to the conformal coating during processing, this utility model provides a battery module and a soft-pack PACK epoxy board bracket connection structure for mounting the battery module.

[0006] This invention not only effectively solves the problems of complex processes and high costs, but also significantly reduces production costs through an epoxy board busbar support structure. It addresses the issues of complex PCB processes, high costs, and the susceptibility of conformal coatings to damage during processing, as well as problems such as short circuits in battery cells, insufficient module withstand voltage, and increased safety risks caused by conformal coating damage. Furthermore, the epoxy board bracket connection structure for battery modules and soft-pack PACKs provided by this invention meets the structural testing requirements of enterprise standards, industry standards, and domestic and international standards.

[0007] To solve the above problems, the technical solution provided by this utility model is as follows: A battery module includes several pouch cells arranged side by side and fixedly connected to each other to form a cell assembly. An EVA board and an epoxy board are fixed around the cell assembly from the inside to the outside. An MPP board and an epoxy board are fixed on the bottom surface of the cell assembly from top to bottom.

[0008] Preferably, the outer periphery of the battery cell assembly is fixed by binding with fiberglass tape, and any two adjacent soft-pack battery cells in the battery cell assembly are fixedly connected by adhesive.

[0009] A soft-pack PACK epoxy board bracket connection structure for mounting the battery module, wherein each soft-pack cell includes a cell body and a positive tab and a negative tab connected to the cell body. The positive tab and the negative tab pass through insertion slots corresponding to the positive tab and the negative tab on the epoxy board busbar support frame and are connected to an aluminum busbar assembly. The aluminum busbar assembly is fixed on the upper surface of the epoxy board busbar support frame. A nickel sheet is provided on the upper surface of the aluminum busbar assembly. The nickel sheet is fixedly connected to one end of a data acquisition line. The other end of the data acquisition line is fixedly connected to a BMS. The BMS is fixed on a sheet metal bracket. The cell assembly is fixed inside the sheet metal bracket. The epoxy board busbar support frame is fixedly disposed on the upper surface of the cell assembly.

[0010] Preferably, the aluminum busbar assembly includes a series aluminum busbar, a positive lead-out aluminum busbar, and a negative lead-out aluminum busbar; the positive lead-out aluminum busbar and the negative lead-out aluminum busbar are respectively installed at both ends of one side of the upper end face of the epoxy board busbar support frame, and series aluminum busbars are installed on both sides of the upper end face of the epoxy board busbar support frame. The series aluminum busbar, the positive lead-out aluminum busbar, and the negative lead-out aluminum busbar are respectively provided with through slots corresponding to the positive and negative leads. The positive and negative leads pass through the through slots and the through slots, and then the positive and negative leads are bent and contact the series aluminum busbar, the positive lead-out aluminum busbar, and the negative lead-out aluminum busbar respectively.

[0011] Preferably, the epoxy board busbar support frame and the aluminum busbar assembly are fixedly connected by a number of plastic rivets.

[0012] Preferably, the width of the groove of the epoxy board busbar support frame is smaller than the width of the through groove of the aluminum busbar assembly.

[0013] Preferably, the positive electrode lead-out aluminum busbar is L-shaped, and one or more rivet nuts are pressed onto the positive electrode lead-out aluminum busbar; the negative electrode lead-out aluminum busbar is L-shaped, and one or more rivet nuts are pressed onto the negative electrode lead-out aluminum busbar.

[0014] Preferably, the sheet metal bracket is provided with clearance grooves corresponding to the positive lead-out aluminum busbar and the negative lead-out aluminum busbar, and support platforms are provided at both ends of the top of the sheet metal bracket. Bending rib limiting platforms are provided on both sides of the middle part of the sheet metal bracket, and a plastic layer is formed by powder coating on the surface of the sheet metal bracket.

[0015] Preferably, the nickel sheet is pure nickel, the acquisition line is a flame-retardant and high-temperature resistant wire, and the epoxy board busbar support frame is made of FR4.

[0016] Preferably, the acquisition line is bundled in multiple places with cloth tape and fixed and limited on the sheet metal bracket.

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model proposes a battery module and a soft-pack PACK epoxy board bracket connection structure for mounting the battery module. Corresponding insertion slots are set on the epoxy board busbar support frame according to the number of soft-pack cells connected in series and parallel. Aluminum busbar assemblies are fixed to the epoxy board busbar support frame using plastic rivets. This effectively solves the mold-making and cost problems of PCB and plastic support frames, greatly reducing production costs. Furthermore, the epoxy board structure is simple, solving the problems of complex processes and high costs associated with existing technologies. Since the positive and negative tabs of the battery cells are made of 0.2-0.5mm thick hard copper or hard aluminum sheets, the conformal coating is easily damaged during tab insertion, leading to problems such as short circuits, insufficient module withstand voltage, and increased safety risks. This utility model uses battery cells connected in series and parallel to form a battery module. The battery module is supported by a sheet metal bracket, increasing structural strength and fully meeting the structural testing requirements of enterprise standards, industry standards, and domestic and international standards. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the connection structure of the soft-pack epoxy board support proposed in an embodiment of this utility model.

[0019] Figure 2 This is an exploded view of the connection structure of the soft-pack epoxy board support proposed in an embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the battery module structure proposed in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the epoxy board busbar support structure of the soft-pack PACK epoxy board bracket connection structure proposed in this embodiment of the utility model.

[0022] The component names and reference numerals in the above figures are as follows: 1 is the battery cell assembly; 101 is the soft-pack battery cell; 102 is the fiberglass tape; 103 is the positive electrode lead-out aluminum busbar; 104 is the first press-fit nut; 105 is the nickel sheet; 106 is the series aluminum busbar; 107 is the through slot; 108 is the epoxy board busbar support frame; 109 is the plastic rivet; 110 is the second press-fit nut; 111 is the negative electrode lead-out aluminum busbar (for data acquisition); 113 is the structural area; 121 is the insertion slot; 122 is the connection hole; 123 is the solid... 131 is the positive electrode lug, 132 is the negative electrode lug, 2 is EVA board one, 3 is BMS3, 4 is the sheet metal bracket, 401 is the support platform, 402 is the clearance groove, 403 is the press-fit stud, 404 is the bending rib limiting platform, 405 is the binding hole, 5 is EVA board two, 6 is epoxy board one, 7 is EVA board three, 8 is EVA board four, 9 is epoxy board two, 10 is the cable tie, 11 is the MPP board, and 12 is the epoxy board three. Detailed Implementation

[0023] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0024] Example 1 like Figure 1 As shown, this embodiment provides a battery module including a plurality of pouch cells 101. The plurality of pouch cells 101 are arranged side by side and fixedly connected to each other to form a cell group 1. An EVA board and an epoxy board are fixedly fixed around the periphery of the cell group 1 from the inside out, and an MPP board and an epoxy board are fixedly fixed on the bottom surface of the cell group 1 from top to bottom. The outer periphery of the cell group 1 is bound and fixed by fiberglass tape 102, and any two adjacent pouch cells 101 in the cell group 1 are fixedly connected by adhesive.

[0025] A soft-pack PACK epoxy board bracket connection structure for mounting battery modules, wherein each soft-pack cell 101 includes a cell body and a positive electrode tab 131 and a negative electrode tab 132 connected to the cell body. According to a series-parallel connection method, the positive electrode tab 131 and the negative electrode tab 132 pass through insertion slots 121 on the epoxy board busbar support frame 108 corresponding to the positive electrode tab 131 and the negative electrode tab 132, and are connected to an aluminum busbar assembly. The epoxy board busbar support frame 108 and the aluminum busbar assembly are fixedly connected by a plurality of plastic rivets 109. The busbar assembly is fixed to the upper surface of the epoxy board busbar support frame 108, which is fixedly mounted on the upper surface of the battery cell assembly 1. The aluminum busbar assembly includes: a series aluminum busbar 106, a positive lead-out aluminum busbar 103, and a negative lead-out aluminum busbar 111. The aluminum busbar assembly connects the positive electrode tab 131 and the negative electrode tab 132 of the battery cell and performs current collection and output. The series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111 are respectively provided with through slots 107 corresponding to the positive electrode tab 131 and the negative electrode tab 132. 2. Passing through the insertion groove 121 and the through groove 107, then bending the positive electrode tab 131 and the negative electrode tab 132 and contacting them respectively with the series aluminum busbar 106, the positive electrode lead-out aluminum busbar 103 and the negative electrode lead-out aluminum busbar 111. Nickel sheets 105 corresponding to the positive electrode tab 131 and the negative electrode tab 132 are provided on the surface of the aluminum busbar assembly. The nickel sheets 105 collect the voltage and temperature of the soft-pack battery cell 101 and output them through the acquisition line 112. EVA board 1 2, EVA board 2 5, EVA board 3 7, EVA board 4 8, MPP board 11 and epoxy board are pasted around the battery cell assembly 1. 29, epoxy board 312, EVA board 12, EVA board 2, EVA board 25, EVA board 37, EVA board 48, MPP board 11, and epoxy board 29 and epoxy board 312 are fixed in the sheet metal bracket 4 by applying glue. The sheet metal bracket 4 is embedded in the external PACK barrel. The sheet metal bracket 4 is provided with a binding hole 405 corresponding to the acquisition line 112 and a clearance groove 402 to avoid the positive lead aluminum busbar 103 and the negative lead aluminum busbar 111. The binding hole 405 is fixed and limited by the cable tie 10. The acquisition line 112 is connected to the BMS3.

[0026] In this embodiment, the epoxy board busbar support frame 108, the series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111 are first fixed with plastic rivets 109. The two ends are the positive lead-out aluminum busbar 103 and the negative lead-out aluminum busbar 111, respectively, and the middle is set as the series aluminum busbar 106. The upper end face of the epoxy board busbar support frame 108 is provided with several connecting holes 122. Several plastic rivets 109 pass through the aluminum busbar assembly and the connecting holes 122 to fix the aluminum busbar assembly to the epoxy board busbar support frame 108. The plastic rivets 109 are made of nylon material. In addition to the connecting holes 122, the epoxy board busbar support frame 108 is also provided with insertion grooves 121 corresponding to the positive tab 131 and negative tab 132 of the soft-pack battery cell 101, as well as fixing bosses. 123. The insertion slot 121 of the epoxy board busbar support 108 is directly opposite the series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111. The width of the insertion slot 121 of the epoxy board busbar support 108 should be smaller than the dimensions of the series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111. It is recommended that the insertion slot 121 be 0.5-1mm smaller than the through slot 107 on the aluminum busbar assembly through which the positive lead-out tab 131 and the negative lead-out tab 132 pass. This can also be adjusted according to dimensional tolerances. The purpose is to prevent the positive lead-out tab 131 and the negative lead-out tab 132 from interfering with the series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111 when passing through the insertion slot 121, which could cause the tabs to deform, bend, or even fail to insert. Figure 3 As shown in the structural area 113, it can be seen that there is no interference with the series aluminum busbar 106, the positive lead aluminum busbar 103, and the negative lead aluminum busbar 111. The epoxy board busbar support frame 108 is provided with a fixing boss 123. The purpose of the fixing boss 123 is to support and fix the positive lead aluminum busbar 103 and the negative lead aluminum busbar 111, so that the plastic rivets 109 have sufficient space to fix the positive lead aluminum busbar 103 and the negative lead aluminum busbar 111 on the epoxy board busbar support frame 108. Considering that the positive lead aluminum busbar 103 and the negative lead aluminum busbar 111 need to be connected to the outside, the positive lead aluminum busbar 103 is L-shaped, and one or more rivet nuts 104 are pressed on the positive lead aluminum busbar 103; the negative lead aluminum busbar 111 is L-shaped, and one or more rivet nuts 110 are pressed on the negative lead aluminum busbar 111. During installation, the epoxy board busbar support frame 108, the series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111 are fixed with plastic rivets 109. The two ends are the positive lead-out aluminum busbar 103 and the negative lead-out aluminum busbar 111, respectively, with the series aluminum busbar 106 in the middle. The upper surface of the epoxy board busbar support frame 108 has several connecting holes 122. Several plastic rivets 109 pass through the aluminum busbar assembly and the connecting holes 122 to fix the aluminum busbar assembly to the epoxy board busbar support frame 108. After fixing, the epoxy board busbar support frame 108, the series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111 are integrated and erected, with the aluminum busbar assembly facing downwards. According to the series and parallel connection of the pouch cells 101, the positive tabs 131 and negative tabs 132 of each pouch cell 101 are aligned with the insertion slots 121 and inserted one by one. Before insertion, hot melt adhesive needs to be sprayed onto the pouch cells 101. After insertion, since the positive tabs 131 and negative tabs 132 are in an upright state, they need to be bent according to the series and parallel connection of the pouch cells 101. At this time, the upper surface of the aluminum busbar assembly has no other structure except for the tabs, and the plastic rivets 109 are lower than the thickness of the aluminum busbar assembly. Therefore, the positive tabs 131 and negative tabs 132 can be fully flattened by repeatedly rolling them from beginning to end with a hand roller, so that the tabs that need to be bonded together can fully contact the aluminum busbar assembly. Figure 3 The bent area 113 shown is in contact with the aluminum busbar assembly, where both sides of the aluminum busbar assembly extend beyond the width of the tabs to prevent lateral deviation of the tabs. The lengthening not only ensures complete overlap between the aluminum busbar assembly and the tabs but also initiates series-parallel connection. Depending on the series-parallel connection requirements, one or more U-shapes are used to connect the soft-pack battery cells 101 in series and parallel. The soft-pack battery cells 101 are stacked to form battery cell group 1. The hot melt adhesive can also be a flexible adhesive such as double-sided tape, used to bond the soft-pack battery cells 101. This novel stacking process achieves the desired bonding effect for industry-standard soft-pack guiding fixtures. The purpose of the fixed electrode tabs is to solve the problems of high PCB cost and complex process. It is achieved by fixing the aluminum busbar assembly with the positive electrode tab 131 and negative electrode tab 132 of the soft pack cell 101 in series and parallel by the epoxy board busbar support frame 108. The epoxy board busbar support frame 108 is made of FR4 material, which is low cost and has good insulation performance, which can greatly reduce production cost. Furthermore, a soft pack PACK epoxy board bracket connection structure has been explored to solve the problems of complex PCB process, high cost, easy damage to conformal coating during processing, and short circuit of the cell, insufficient module withstand voltage, and increased safety risks caused by the damage to conformal coating.

[0027] After the battery cell group 1 is stacked, it is bundled into a group by one or more fiberglass tapes 102. For buffering and insulation considerations for the soft-pack battery cell 101, EVA board 1-2 is attached to the front and back sides of the battery cell group 1, and EVA board 4-8 is attached to the left and right sides of the battery cell group 1. A strip-shaped MPP board 11 is attached to the bottom of the battery cell group 1, with some space reserved. Since the outer surface of the soft-pack battery cell 101 is an aluminum-plastic film, considering the thickness deviation of the battery cell and the buffering of structural strength, EVA (ethylene-vinyl acetate copolymer) and MPP (polypropylene microporous foam material) are attached. EVA and MPP are foam materials; their structure can be compressed, they also have certain insulating properties, and they have a good buffering effect. The bottom of the battery cell group 1... A strip of MPP board 11 is affixed to the sheet metal bracket 4, leaving some space. The purpose of leaving this space is to connect the battery cell assembly 1 and the sheet metal bracket 4 with structural adhesive. Before connecting the sheet metal bracket 4, considering the limited insulation of EVA and MPP and their contact with metal, epoxy board 1 6 is affixed to the front and back sides of the sheet metal bracket 4, epoxy board 2 9 is affixed to the left and right sides, and epoxy board 3 12 is affixed to the bottom. This is to prevent the soft-pack battery cell 101 from directly contacting the sheet metal and to provide insulation. In addition, the surface of the sheet metal bracket 4 is powder-coated, which can provide some protection, but the processing is easy and there are some protruding burrs. Affixing epoxy boards can prevent the soft-pack battery cell 101 from being punctured, avoid short circuits, and reduce the risk of fire.

[0028] In this application, nickel plates 105 are provided on the upper surfaces of the series aluminum busbar 106, the positive lead aluminum busbar 103, and the negative lead aluminum busbar 111. The nickel plates 105 are connected to the data acquisition line 112, which is secured by the limiting hole 405 of the sheet metal bracket 4. The data acquisition line 112 is respectively provided with connecting wires and nickel plates to connect to the series aluminum busbar 106, the positive lead aluminum busbar 103, and the negative lead aluminum busbar 111, acquiring the voltage and temperature of the soft-pack battery cell 101. The data acquisition line 112 is also connected to the BMS3 (Battery Management System). The Battery Management System (BMS3) primarily monitors and manages data, as well as providing emergency switching functions. Since BMS3 is a standard market component, details are omitted. Nickel strip 105 is welded to the aluminum busbar using a low-power handheld laser welding machine. One end of nickel strip 105 is pressed against the voltage and temperature acquisition line 112. All nickel strip 105 leads are secured by multiple dots of cloth tape. The acquisition line is high-temperature resistant (≥120°C) and flame-retardant (meets UL94 V-0 standards) to prevent overheating from the aluminum busbar assembly. Insufficient temperature and flame retardancy of the acquisition line could lead to fire hazards.

[0029] In this application, the sheet metal bracket 4 is provided with a clearance groove 402 to avoid the positive lead aluminum busbar 103 and the negative lead aluminum busbar 111, preventing the sheet metal from contacting the lead aluminum busbar assembly and causing a short circuit. It is also provided with a press-fit stud 403 to fix the BMS3 and prevent the BMS3 from moving. The sheet metal bracket 4 is provided with a bending rib limiting platform 404 to fix and limit the position of the battery cell assembly 1, so that the battery cell assembly 1 can fall into the sheet metal bracket 4 for positioning. The sheet metal bracket 4 is provided with a support platform 401 to connect the outer support rib. The support platform 401 is fixedly connected to the outer plastic shell and the sheet metal shell. The sheet metal bracket 4 is made of steel and has the material properties of steel. The sheet metal can be selected from 1-5mm according to the structural control. The structural strength is sufficient to meet the structural testing requirements of enterprise standards, industry standards, domestic and international standards. At present, the industry basically uses plastic buckets or plastic shells to support the battery cell assembly 1. Plastic buckets or plastic shells require mold opening, which is costly and complex in structure. The use of sheet metal bracket 4 greatly reduces the processing cycle and simplifies the production process, while also meeting the structural strength requirements.

[0030] In practical applications, the lengths of the soft-pack battery cell 101, positive tab 131, and negative tab 132 are not necessarily equal. Based on the length of the bent area structure 113, the positive tab 131 and negative tab 132 are first cut using a cutting device before the battery cells are glued and stacked.

[0031] In practical applications, the positive tab 131 and negative tab 132 need to be bent according to the series and parallel connection of the battery cells. Since the tabs on the upper surface of the aluminum busbar assembly have no other structure and the plastic rivet 109 is lower than the thickness of the aluminum busbar assembly, the positive tab 131 and negative tab 132 can be fully flattened by repeatedly rolling them from beginning to end with a hand roller, so that the tabs that need to be attached together can fully contact the aluminum busbar assembly. The positive tab 131 and negative tab 132 are then welded by laser welding, so that the positive tab 131 and negative tab 132 are welded to the series aluminum busbar 106, the positive lead-out aluminum busbar 103, and the negative lead-out aluminum busbar 111.

[0032] In practical applications, the battery cell assembly 1 is installed inside the sheet metal bracket 4. The size of the support platform 401 of the sheet metal bracket 4 is adjusted or holes are added according to the space of the plastic bucket or plastic shell of the external PACK. In addition, EVA board 2 5 is attached to the bottom side of the battery cell assembly 1, and EVA board 3 7 is attached to the top side, which perfectly matches the space structure of the plastic bucket or plastic shell of the external PACK and plays a role in fixing and supporting.

[0033] One module in this embodiment includes the epoxy board support connection structure for a soft-pack PACK as described in Embodiment 1. This module, by employing the aforementioned epoxy board busbar support frame 108, not only replaces the traditional PCB structure but also reduces production costs and improves battery safety.

[0034] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A battery module, characterized in that, It includes several soft-pack battery cells (101), which are arranged side by side and fixedly connected to each other to form a battery cell group (1). EVA board and epoxy board are fixed around the battery cell group (1) from the inside to the outside, and MPP board and epoxy board are fixed on the bottom surface of the battery cell group (1) from top to bottom.

2. The battery module according to claim 1, characterized in that, The outer periphery of the battery cell assembly (1) is fixed by fiberglass tape (102), and any two adjacent soft-pack battery cells (101) in the battery cell assembly (1) are fixedly connected by adhesive.

3. A soft-pack PACK epoxy board bracket connection structure for mounting the battery module according to any one of claims 1-2, characterized in that: Each of the aforementioned soft-pack battery cells (101) includes a battery cell body and a positive electrode (131) and a negative electrode (132) connected to the battery cell body. The positive electrode (131) and the negative electrode (132) pass through the insertion slots (121) corresponding to the positive electrode (131) and the negative electrode (132) provided on the epoxy board busbar support frame (108) and are connected to the aluminum busbar assembly. The aluminum busbar assembly is fixed on the upper surface of the epoxy board busbar support frame (108). A nickel sheet (105) is provided on the upper surface of the aluminum busbar assembly. The nickel sheet (105) is fixedly connected to one end of the acquisition line (112). The other end of the acquisition line (112) is fixedly connected to the BMS (3). The BMS (3) is fixed on the sheet metal bracket (4). The battery cell group (1) is fixed inside the sheet metal bracket (4). The epoxy board busbar support frame (108) is fixedly provided on the upper surface of the battery cell group (1).

4. The flexible PACK epoxy board support connection structure according to claim 3, characterized in that, The aluminum busbar assembly includes a series aluminum busbar (106), a positive electrode lead-out aluminum busbar (103), and a negative electrode lead-out aluminum busbar (111). The positive electrode lead-out aluminum busbar (103) and the negative electrode lead-out aluminum busbar (111) are respectively installed at both ends of one side of the upper end face of the epoxy board busbar support frame (108). Series aluminum busbars (106) are installed on both sides of the upper end face of the epoxy board busbar support frame (108). The positive electrode (131) and negative electrode (132) lead-out aluminum busbar (111) are respectively provided with through slots (107). The positive electrode (131) and negative electrode (132) pass through the through slot (121) and through slot (107), and then the positive electrode (131) and negative electrode (132) are bent and contacted with the series aluminum busbar (106), the positive electrode lead-out aluminum busbar (103) and the negative electrode lead-out aluminum busbar (111) respectively.

5. The flexible PACK epoxy board support connection structure according to claim 4, characterized in that, The epoxy board busbar support frame (108) and the aluminum busbar assembly are fixedly connected by a number of plastic rivets (109).

6. The flexible PACK epoxy board support connection structure according to claim 4, characterized in that, The width of the slot (121) of the epoxy board busbar support frame (108) is smaller than the width of the through slot (107) of the aluminum busbar assembly.

7. The flexible PACK epoxy board support connection structure according to claim 4, characterized in that, The positive lead-out aluminum busbar (103) is L-shaped, and one or more rivet nuts (104) are pressed onto the positive lead-out aluminum busbar (103); the negative lead-out aluminum busbar (111) is L-shaped, and one or more rivet nuts (110) are pressed onto the negative lead-out aluminum busbar (111).

8. The flexible PACK epoxy board support connection structure according to claim 4, characterized in that, The sheet metal bracket (4) is provided with clearance grooves (402) corresponding to the positive lead-out aluminum busbar (103) and the negative lead-out aluminum busbar (111). Support platforms (401) are provided at both ends of the top of the sheet metal bracket (4). Bending rib limiting platforms (404) are provided on both sides of the middle part of the sheet metal bracket (4). A plastic layer is formed by spraying on the surface of the sheet metal bracket (4).

9. The flexible PACK epoxy board support connection structure according to claim 3, characterized in that, The nickel sheet (105) is pure nickel, the acquisition line (112) is a flame-retardant and high-temperature resistant wire, and the epoxy board busbar support frame (108) is made of FR4.

10. The flexible PACK epoxy board support connection structure according to claim 9, characterized in that, The acquisition line (112) is bound in multiple places with cloth tape and fixed and limited on the sheet metal bracket (4).

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