Battery module and internal assembly structure thereof

Abstract

The utility model relates to battery technology field discloses a kind of battery module internal assembly structure, by being set between two adjacent battery cells Assembly structure, assembly structure includes first heat-conducting thermal insulation and two supports, the first support plate of support and the length-width surface of battery cell are pasted, and first heat-conducting thermal insulation is set between the first support plate of two supports, support not only promotes the rigidity and hardness of battery cell in whole module, and can be the length-width surface of battery cell heat and heat conduction, increase the heat-conducting path of length-width surface, to promote the heat dissipation rate of whole battery cell. First heat-conducting thermal insulation can absorb the tolerance of battery cell on assembly and delay the heat spread of single battery cell before thermal runaway and after the first heat-conducting thermal insulation can prevent two supports from being completely contacted, avoid the further occurrence of the heat controlled of next stage to be accelerated, to promote the heat dissipation rate and group efficiency of module. The utility model further discloses a kind of battery, and battery is composed of multiple battery cells and above-mentioned assembly structure.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, and in particular to a battery module and its internal assembly structure. Background Technology

[0002] Under high-power discharge and fast charging conditions, battery cells generate significant heat, placing stringent demands on thermal management. For frequently used devices, the cooling rate directly impacts operational efficiency, and the heat flux conducted through the battery cell is the primary bottleneck for heat dissipation. A battery cell is a non-homogeneous thermal conductor, with heat conduction interfaces primarily consisting of its long and wide surfaces, sides, and tabs. The long and wide surfaces offer the largest heat dissipation area but have lower thermal conductivity in these directions, while the sides offer higher thermal conductivity but smaller heat dissipation area. Relying solely on side cooling is insufficient to meet the cooling rate requirements under high-power discharge and fast charging conditions. Utility Model Content

[0003] The purpose of this invention is to provide a battery module and its internal assembly structure that improves heat dissipation rate and assembly efficiency.

[0004] To achieve the above objectives, this utility model provides an internal assembly structure for a battery module. The battery module includes several battery cells, a first thermally conductive insulating component, and two brackets. Two adjacent battery cells are mounted on the two brackets. Each bracket has a first support plate. The long and wide surfaces of the battery cells are in contact with the first support plate. The first thermally conductive insulating component is located between the first support plates of the two brackets.

[0005] As a preferred embodiment, the bracket further includes a second support plate and a third support plate, both of which are connected to opposite sides of the first support plate, making the bracket a C-shaped structure with an opening. The openings of the two brackets face opposite directions, and two adjacent battery cells are respectively located between the second support plate and the third support plate of the two brackets.

[0006] As a preferred embodiment, the bracket further includes a second support plate, which is connected to the first support plate to form an L-shaped structure, with the battery cell located above the second support plate.

[0007] As a preferred embodiment, the bracket further includes a second support plate and a fourth support plate, the fourth support plate being parallel to the first support plate, and the first support plate and the fourth support plate being connected to both sides of the second support plate respectively, so that the cross-section of the bracket is U-shaped.

[0008] As a preferred embodiment, a second thermally conductive insulating component is also included. The battery module is provided with a heat dissipation structure, and the second thermally conductive insulating component is located on the side of the battery cell away from the heat dissipation structure.

[0009] As a preferred embodiment, the first thermally conductive and insulating component is foam.

[0010] As a preferred embodiment, the first thermally conductive insulation component includes foam and an insulation material layer, with the insulation material layer disposed between the foam and the first support plate.

[0011] As a preferred embodiment, the battery cell is further provided with an outer frame, which is provided on both sides of the battery cell and is connected to the battery cell and the first support plate.

[0012] As a preferred embodiment, it also includes a positioning post, wherein the first support plate is provided with a first mounting hole, and the outer frame is provided with a second mounting hole, and the positioning post passes through the first mounting hole on the first support plate of the two brackets and the second mounting hole on the two outer frames located on the same side of the battery cell.

[0013] As a preferred embodiment, the outer frame includes a first frame, an intermediate body, and a second frame. The first frame and the second frame are annular structures with through channels, and the two ends of the intermediate body are connected to the first frame and the second frame.

[0014] As a preferred embodiment, the intermediate body is provided with a clearance notch for welding the tabs of the battery cell.

[0015] As a preferred embodiment, a gasket is also included, the gasket being located between the first support plates of the two supports.

[0016] As a preferred embodiment, the gasket is provided with multiple through holes.

[0017] As a preferred embodiment, the device further includes a gasket and a positioning post. The gasket is located between the first support plates of the two brackets. The first support plate has a first mounting hole, the outer frame has a second mounting hole, and the gasket has a third mounting hole. The positioning post passes through the third mounting hole, the first mounting hole on the first support plate of the two brackets, and the second mounting hole on the two outer frames located on the same side of the battery cell.

[0018] As a preferred embodiment, a thermally conductive gel layer is provided between the side of the battery cell and the outer frame.

[0019] This utility model also provides a battery module, including multiple battery modules, each battery module including two battery cells, and the battery module also including the aforementioned internal assembly structure of the battery module. The two battery cells are installed on the internal assembly structure of the battery module, and the multiple battery modules are arranged side by side to form a module.

[0020] As a preferred embodiment, the battery also includes several heat-insulating end plates, which are disposed between two adjacent battery modules and between two adjacent battery cells, with one or more battery modules between two adjacent heat-insulating end plates.

[0021] As a preferred embodiment, the system further includes a lower cover plate, an upper cover plate, and multiple end plates. The lower cover plate, the upper cover plate, and the multiple end plates are connected to form a housing. The module is disposed within the housing. A thermally conductive gel layer is provided between the module and the lower cover plate, and a fiberglass plate is provided between the module and the upper cover plate.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This invention utilizes an assembly structure between two adjacent battery cells. The assembly structure includes a first thermally conductive insulating component and two supports. The first support plate of each support plate is fitted to the long and wide surfaces of the battery cell, and the first thermally conductive insulating component is positioned between the first support plates of the two supports. The supports not only enhance the rigidity and hardness of the battery cell within the entire module but also promote uniform heat distribution and conduction across the long and wide surfaces of the battery cell, increasing the heat conduction path and thus improving the overall heat dissipation rate of the battery cell. The first thermally conductive insulating component can absorb assembly tolerances and delay the thermal propagation of a single battery cell before thermal runaway. After runaway, the first thermally conductive insulating component can prevent the two supports from making complete contact, avoiding accelerated further thermal runaway, thereby improving the module's heat dissipation rate and assembly efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the battery cell according to an embodiment of the present invention.

[0025] Figure 2 This is a cross-sectional view of the bracket and the first thermally conductive and insulating component according to Embodiment 1 of this utility model.

[0026] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0027] Figure 4 This is a cross-sectional view of the battery cell and bracket assembly according to Embodiment 1 of this utility model.

[0028] Figure 5 This is an exploded view of the internal assembly structure of the battery module according to Embodiment 1 of this utility model.

[0029] Figure 6 This is a schematic diagram of the battery cell and internal assembly structure after assembly according to Embodiment 1 of this utility model.

[0030] Figure 7 This is an exploded view of the battery cell and internal assembly structure of Embodiment 1 of this utility model.

[0031] Figure 8 This is a schematic diagram of the structure of the bracket and the first thermally conductive and insulating component in Embodiment 2 of this utility model.

[0032] Figure 9 This is a schematic diagram of the structure of the bracket and the first thermally conductive and insulating component in Embodiment 3 of this utility model.

[0033] Figure 10 This is a schematic diagram of the structure of the bracket and the first thermally conductive and insulating component in Embodiment 4 of this utility model.

[0034] Figure 11 This is a schematic diagram of the battery module according to an embodiment of the present invention.

[0035] In the diagram, 1-battery cell; 101-length and width surfaces; 102-positive electrode tab; 103-negative electrode tab; 104-folded edge; 2-first thermally conductive and insulating component; 201-foam; 202-insulation material layer; 3-bracket; 301-first support plate; 3011-first mounting hole; 302-second support plate; 303-third support plate; 304-fourth support plate; 4-second thermally conductive and insulating component; 5-outer frame; 501-first frame; 502-second frame; 503-intermediate body; 504-second mounting hole; 505-avoidance notch; 506-fourth mounting hole; 6-positioning post; 7-gasket; 701-third mounting hole; 702-through hole; 8-insulation end plate; 9-connecting post. Detailed Implementation

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0037] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] Example 1

[0041] like Figures 1 to 7 As shown in the preferred embodiment of this utility model, an internal assembly structure for a battery module includes several battery cells 1, a first thermally conductive insulating component 2, and two supports 3. Two adjacent battery cells 1 are mounted on the two supports 3. Each support 3 has a first support plate 301. The long and wide surfaces 101 of the battery cells 1 are in contact with the first support plate 301. The first thermally conductive insulating component 2 is located between the first support plates 301 of the two supports 3. This embodiment, by setting an assembly structure between two adjacent battery cells 1, including the first thermally conductive insulating component 2 and two supports 3, with the first support plate 301 of the supports 3 in contact with the long and wide surfaces 101 of the battery cells 1 and the first thermally conductive insulating component 2 located between the first support plates 301 of the two supports 3, not only improves the rigidity and hardness of the battery cells 1 in the entire module but also provides uniform heat distribution and heat conduction for the long and wide surfaces 101 of the battery cells 1, increasing the heat conduction path of the long and wide surfaces 101, thereby improving the heat dissipation rate of the entire battery cell 1. The first thermally conductive insulation component 2 can absorb the assembly tolerance of the battery cell 1 and delay the thermal spread of the single battery cell 1 before thermal runaway. After runaway, the first thermally conductive insulation component 2 can prevent the two brackets 3 from making complete contact, thus avoiding the further occurrence of thermal runaway in the next stage, thereby improving the heat dissipation rate and assembly efficiency of the module.

[0042] Furthermore, the bracket 3 in this embodiment also includes a second support plate 302 and a third support plate 303. The second support plate 302 and the third support plate 303 are both connected to opposite sides of the first support plate 301, making the bracket 3 a C-shaped structure with openings. The openings of the two brackets 3 face opposite directions, and two adjacent battery cells 1 are located between the second support plate 302 and the third support plate 303 of the two brackets 3, respectively. In this embodiment, the second support plate 302 and the third support plate 303 are perpendicularly connected to the first support plate 301. The C-shaped structure of the bracket 3 can surround the side surface and the long and wide surface 101 of the battery, further improving the rigidity and hardness of the battery cell 1 in the module. This semi-enclosed structure can simultaneously provide heat equalization and heat conduction to the top and bottom sides and the long and wide surface 101 of the battery cell 1. In the case of only a cold source on the bottom side, it adds an extra heat conduction path on the long and wide surface 101 and a small-throughput heat conduction path on the top side. This improves the heat dissipation rate of the entire battery cell 1. The bracket 3 in this embodiment is made of aluminum, which has good thermal conductivity and heat equalization functions.

[0043] Furthermore, the internal assembly structure of the battery module in this embodiment also includes a second thermally conductive insulating component 4. The battery module has a heat dissipation structure, and the second thermally conductive insulating component 4 is located on the side of the battery cell 1 away from the heat dissipation structure. During assembly, the second thermally conductive insulating component 4 can absorb the tolerance in the width direction of the battery cell 1 and limit the battery cell 1 in the bracket 3. In the event of thermal runaway, it plays a role in heat insulation, preventing heat from being transferred towards the cabin. On the C-shaped bracket 3, the second thermally conductive insulating component 4 is located between the third support plate 303 and the upper side of the battery cell 1. The second thermally conductive insulating component 4 is located above the battery cell 1 and is in contact with the upper side of the battery cell 1. The second thermally conductive insulating component 4 is located on the side of the battery cell 1 away from the heat dissipation structure (such as a cold plate). In this embodiment, a heat dissipation structure is provided below the battery module, so the second thermally conductive insulating component 4 is located above the battery cell 1.

[0044] Optionally, in this embodiment, both the first thermally conductive insulating component 2 and the second thermally conductive insulating component 4 are foam. Foam is elastic, allowing it to absorb tolerances during assembly. At operating temperatures, it acts as a thermally conductive material, resulting in smaller temperature differences and better uniformity between batteries. At high temperatures, it becomes a porous material, which can then be used as an insulating material to slow the spread of runaway heat. In the event of thermal runaway, the foam weakens the heat transfer capacity at the top. At high temperatures, the foam completely melts, forming an air gap. Utilizing the low thermal conductivity of air, it becomes an insulating material, preventing heat transfer. After thermal runaway, the battery cell 1 expands. The battery cell 1 is supported by the bracket 3. The first thermally conductive insulating component 2 melts, creating an air gap between the two brackets 3, which slows the spread of heat between battery cells 1 and prevents rapid runaway. After thermal runaway, the second thermally conductive insulating component 4 melts, forming an air gap to prevent heat from being conducted to the cabin. It should be noted that the first thermally conductive insulation component 2 and the second thermally conductive insulation component 4 may also be made of other general thermally conductive materials at normal temperature and expanded foamed porous insulation materials at higher temperatures.

[0045] In addition, the internal assembly structure of the battery module in this embodiment also includes an outer frame 5. The outer frame 5 is provided on both sides of the battery cell 1, and is connected to the battery cell 1 and the first support plate 301. The outer frame 5 is mainly used for fixing and modularly installing the battery cell 1. The outer frame 5 not only provides heat conduction and dissipation for the battery cell 1 under operating conditions, but also serves as a heat insulation and protection component in the event of a battery cell 1 failure. Furthermore, it facilitates the assembly of the battery cell 1 and improves the mechanical properties of the battery cell itself.

[0046] In this embodiment, the internal assembly structure of the battery module also includes a positioning post 6. The first support plate 301 is provided with a first mounting hole 3011, and the outer frame 5 is provided with a second mounting hole 504. The positioning post 6 passes through the first mounting hole 3011 on the first support plate 301 of the two brackets 3 and the second mounting hole 504 on the two outer frames 5 located on the same side of the cell 1. The brackets 3 and the outer frames 5 are connected by the positioning post 6.

[0047] Specifically, the outer frame 5 includes a first frame 501, an intermediate body 503, and a second frame 502. The first frame 501 and the second frame 502 are annular structures with through channels. The two ends of the intermediate body 503 are connected to the first frame 501 and the second frame 502. The channels of the first frame 501 and the second frame 502 are used as flues for thermal runaway gas generation.

[0048] In addition, the intermediate body 503 is provided with a clearance notch 505 for welding the tabs of the battery cell 1. The clearance notch 505 is a reserved position for bending the tabs for welding.

[0049] Furthermore, the internal assembly structure of the battery module in this embodiment also includes a gasket 7. The gasket 7 is located between the first support plates 301 of the two brackets 3. The first support plate 301 has a first mounting hole 3011, the outer frame 5 has a second mounting hole 504, and the gasket 7 has a third mounting hole 701. The positioning post 6 passes through the third mounting hole 701, the first mounting hole 3011 on the first support plate 301 of the two brackets 3, and the second mounting hole 504 on the two outer frames 5 located on the same side of the cell 1. The positioning post 6 connects the gasket 7, the two outer frames 5, and the first support plates 301 of the two brackets 3. In this embodiment, the positioning post 6 is a thermoplastic material. One end of the positioning post 6 is fixed in the second mounting hole 504 of one of the outer frames 5, and then passes through the first support plates 301 of the two brackets 3 and the gasket 7 in the middle, until it emerges from the second mounting hole 504 of the other outer frame 5. The end that emerges is melted to achieve fixation. The gasket 7 can separate the two outer frames, preventing the heat generated by one cell from affecting the other cell, and at the same time preventing pressure on the first thermal insulation component 2 during installation.

[0050] Furthermore, the gasket 7 in this embodiment is also provided with several through holes 702. The third mounting hole 70 is used for positioning and installation, and the through holes 702 are used to reduce weight and reduce heat conduction between aluminum parts after the battery cell runs away. In this embodiment, the through holes 702 are oblong holes.

[0051] The internal assembly structure of the battery module also includes connecting posts 9. The first frame 501 and the second frame 502 are provided with fourth mounting holes 506. The upper connecting post 9 passes through the fourth mounting holes 506 on the first frame 501 of the two adjacent outer frames 5, and the lower connecting post 9 passes through the fourth mounting holes 506 on the second frame 502 of the two adjacent outer frames 5. Two battery cells 1 and one internal assembly structure of the battery module are connected into a small module by positioning posts 6, and the connecting posts 9 are used to assemble the various small modules into a large overall module.

[0052] In this embodiment, a thermally conductive gel layer is provided between the side of the battery cell 1 and the outer frame 5. The battery cell 1 and the outer frame 5 are assembled using an adhesive process. The thermally conductive gel can fill the gap to secure the battery cell 1 and the outer frame 5, and can reduce contact thermal resistance. In addition, the long and wide surfaces 101 of the battery cell 1 have good contact with the support 3, but due to insufficient gravity, the side of the battery cell 1 has poor contact with the support 3 and the side of the battery cell 1, resulting in a certain air thermal resistance. Thermally conductive gel is used to fill the gap on this side to reduce the contact thermal resistance.

[0053] In this embodiment, the battery cell 1 has a positive tab 102 and a negative tab 103 on its left and right sides, respectively. The top and bottom sides of the battery cell 1 both have folded edges 104 extending in the left and right directions. The gaps between the folded edges 104, the sides of the battery cell 1, the outer frame, and the support 3 are filled with thermally conductive gel. It should be noted that the electrode positions of the battery cell 1 include, but are not limited to, double-sided tabs, and the encapsulation positions include, but are not limited to, double-sided sealing and single-sided sealing. The double-tab design in this embodiment can appropriately increase the tab width to improve current carrying capacity. Since there is space on both sides of the double-tab position, during thermal runaway gas depressurization, double-sided depressurization can appropriately reduce the thermal impact of high-temperature flue gas on the single-sided side plate compared to single-sided depressurization. To reduce air thermal resistance, the double-sided sealing on the sides uses thermally conductive interface gel to fill the gaps at the folded edges 104, reducing the thermal resistance of the battery cell 1.

[0054] Example 2

[0055] The difference between this embodiment and embodiment one is that, based on embodiment one, the structure of the support 3 in this embodiment is different from that of the support 3 in embodiment one.

[0056] like Figure 8As shown, in this embodiment, the bracket 3 further includes a second support plate 302, which is connected to the first support plate 301, making the bracket 3 form an L-shaped structure. The battery cell 1 is located above the second support plate 302. In this embodiment, a second thermally conductive insulating component 4 is placed above the battery cell 1 for buffering and heat insulation.

[0057] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again here.

[0058] Example 3

[0059] The difference between this embodiment and embodiment one is that, based on embodiment one, the structure of the support 3 in this embodiment is different from that of the support 3 in embodiment one.

[0060] like Figure 9 As shown, the bracket 3 in this embodiment also includes a second support plate 302 and a fourth support plate 304. The fourth support plate 304 is parallel to the first support plate 301. The first support plate 301 and the fourth support plate 304 are respectively connected to both sides of the second support plate 302, making the cross-section of the bracket 3 U-shaped. The U-shaped cross-section of the bracket 3 in this embodiment can dissipate heat from the two long and wide surfaces 101 and the bottom side of the battery cell 1. The upper side of the battery cell 1 is heat-conducted by a second thermally conductive insulating member 4 disposed above the battery cell 1.

[0061] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again here.

[0062] Example 4

[0063] The difference between this embodiment and Embodiment 1 is that, based on Embodiment 1, the first thermally conductive insulation component 2 in this embodiment is different from that in Embodiment 1.

[0064] like Figure 10 As shown, in this embodiment, the first thermally conductive and insulating component 2 includes foam 201 and an insulating material layer 202, with the insulating material layer 202 disposed between the foam 201 and the first support plate 301. The first thermally conductive and insulating component 2 in this embodiment adopts a composite structure, achieving buffering and heat insulation while meeting grouping efficiency requirements. Optionally, in this embodiment, the insulating material layer 202 may be disposed between the foam 201 and the first support plates 301 of both supports 3, or only between the foam 201 and the first support plate 301 of one of the supports 3.

[0065] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again here.

[0066] Example 5

[0067] like Figure 11As shown, a preferred embodiment of the present invention provides a battery module comprising multiple battery modules, each battery module comprising two battery cells 1, and the battery module further comprising an internal assembly structure of the battery module as described in Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4. The two battery cells 1 are mounted on the internal assembly structure of the battery module, and the multiple battery modules are arranged side by side to form a module.

[0068] Furthermore, the battery module of this embodiment also includes several heat-insulating end plates 8, which are disposed between two adjacent battery modules and between two adjacent battery cells 1. One or more battery modules are located between two adjacent heat-insulating end plates 8. The heat-insulating end plates 8 can delay heat propagation when thermal runaway occurs in a battery cell 1. Optionally, the module of this embodiment is a 60S module, in which a heat-insulating end plate 8 is inserted in the middle of the entire 30S battery cell 1, or a heat-insulating end plate 8 can be inserted every 6S.

[0069] Furthermore, the battery module in this embodiment also includes a lower cover plate, an upper cover plate, and multiple end plates. The lower cover plate, upper cover plate, and multiple end plates are connected to form a housing, and the module is disposed inside the housing. A thermally conductive gel layer is provided between the module and the lower cover plate, and a fiberglass plate is provided between the module and the upper cover plate. The entire bottom and the middle of the lower cover plate are filled with thermally conductive gel, and the lower cover plate then contacts a cold plate for heat dissipation. The top position contacts the fiberglass plate and the upper cover plate. The upper and lower covers and end plates can be welded together. When cooling at the bottom, the top position can also dissipate heat through the path connecting the end plates and the lower cover plate.

[0070] In summary, this utility model embodiment provides an internal assembly structure for a battery module. The assembly structure, consisting of a first thermally conductive insulating component 2 and two supports 3, is positioned between two adjacent battery cells 1. The first support plate 301 of each support 3 is fitted to the long and wide surfaces 101 of the battery cell 1. The first thermally conductive insulating component 2 is positioned between the first support plates 301 of the two supports 3. The supports 3 not only enhance the rigidity and hardness of the battery cell 1 within the entire module but also provide uniform heat distribution and conduction for the long and wide surfaces 101 of the battery cell 1, increasing the heat conduction path of the long and wide surfaces 101 and thus improving the overall heat dissipation rate of the battery cell 1. The first thermally conductive insulating component 2 can absorb assembly tolerances of the battery cell 1 and delay the thermal propagation of a single battery cell 1 before thermal runaway. After runaway, the first thermally conductive insulating component 2 can prevent the two supports 3 from fully contacting, avoiding accelerated further thermal runaway, thereby improving the module's heat dissipation rate and assembly efficiency. This utility model embodiment also provides a battery module, including multiple battery modules, each battery module including two battery cells 1, and the battery module also including the aforementioned internal assembly structure of the battery module. The two battery cells 1 are installed on the internal assembly structure of the battery module, and the multiple battery modules are arranged side by side to form a module.

[0071] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An internal assembly structure for a battery module, the battery module comprising a plurality of battery cells (1), characterized in that, It includes a first thermally conductive insulation component (2) and two brackets (3). Two adjacent battery cells (1) are mounted on the two brackets (3). Each bracket (3) has a first support plate (301). The long and wide surfaces (101) of the battery cell (1) are in contact with the first support plate (301). The first thermally conductive insulation component (2) is located between the first support plates (301) of the two brackets (3).

2. The internal assembly structure of the battery module according to claim 1, characterized in that, The bracket (3) further includes a second support plate (302) and a third support plate (303). The second support plate (302) and the third support plate (303) are both connected to the opposite sides of the first support plate (301), so that the bracket (3) is a C-shaped structure with an opening. The openings of the two brackets (3) face opposite directions, and the two adjacent cells (1) are located between the second support plate (302) and the third support plate (303) of the two brackets (3).

3. The internal assembly structure of the battery module according to claim 1, characterized in that, The bracket (3) also includes a second support plate (302), which is connected to the first support plate (301) to form an L-shaped structure, and the battery cell (1) is located above the second support plate (302).

4. The internal assembly structure of the battery module according to claim 1, characterized in that, The bracket (3) further includes a second support plate (302) and a fourth support plate (304). The fourth support plate (304) is parallel to the first support plate (301). The first support plate (301) and the fourth support plate (304) are respectively connected to both sides of the second support plate (302), so that the cross section of the bracket (3) is U-shaped.

5. The internal assembly structure of the battery module according to claim 1, characterized in that, It also includes a second thermally conductive insulation component (4), the battery module is provided with a heat dissipation structure, and the second thermally conductive insulation component (4) is located on the side of the battery cell (1) away from the heat dissipation structure.

6. The internal assembly structure of the battery module according to claim 1, characterized in that, The first thermally conductive insulation component (2) is foam (201).

7. The internal assembly structure of the battery module according to claim 1, characterized in that, The first thermally conductive insulation component (2) includes foam (201) and insulation material layer (202), and the insulation material layer (202) is provided between the foam (201) and the first support plate (301).

8. The internal assembly structure of the battery module according to claim 1, characterized in that, It also includes an outer frame (5), which is provided on both sides of the battery cell (1). The outer frame (5) is connected to the battery cell (1) and the first support plate (301).

9. The internal assembly structure of the battery module according to claim 8, characterized in that, It also includes a positioning post (6), a first mounting hole (3011) on the first support plate (301), and a second mounting hole (504) on the outer frame (5). The positioning post (6) passes through the first mounting hole (3011) on the first support plate (301) of the two brackets (3) and the second mounting hole (504) on the two outer frames (5) located on the same side of the cell (1).

10. The internal assembly structure of the battery module according to claim 8, characterized in that, The outer frame (5) includes a first frame (501), an intermediate body (503) and a second frame (502). The first frame (501) and the second frame (502) are annular structures with through channels. The two ends of the intermediate body (503) are connected to the first frame (501) and the second frame (502).

11. The internal assembly structure of the battery module according to claim 10, characterized in that, The intermediate body (503) is provided with a clearance notch (505) for welding the tabs of the battery cell (1).

12. The internal assembly structure of the battery module according to claim 1, characterized in that, It also includes a gasket (7) located between the first support plates (301) of the two supports (3).

13. The internal assembly structure of the battery module according to claim 12, characterized in that, The gasket (7) is provided with multiple through holes (702).

14. The internal assembly structure of the battery module according to claim 8, characterized in that, It also includes a gasket (7) and a positioning post (6). The gasket (7) is located between the first support plates (301) of the two brackets (3). The first support plate (301) is provided with a first mounting hole (3011). The outer frame (5) is provided with a second mounting hole (504). The gasket (7) is provided with a third mounting hole (701). The positioning post (6) passes through the third mounting hole (701), the first mounting hole (3011) on the first support plate (301) of the two brackets (3), and the second mounting hole (504) on the two outer frames (5) located on the same side of the cell (1).

15. The internal assembly structure of the battery module according to claim 8, characterized in that, A thermally conductive gel layer is provided between the side of the battery cell (1) and the outer frame (5).

16. A battery module, characterized in that, The battery module includes multiple battery modules, each battery module including two battery cells (1), and the battery module also includes an internal assembly structure for the battery module as described in any one of claims 1-15. The two battery cells (1) are mounted on the internal assembly structure for the battery module, and the multiple battery modules are arranged side by side to form a module.

17. The battery module according to claim 16, characterized in that, It also includes several heat insulation end plates (8), which are disposed between two adjacent battery modules and between two adjacent battery cells (1), with one or more battery modules between two adjacent heat insulation end plates (8).

18. The battery module according to claim 16 or 17, characterized in that, It also includes a lower cover plate, an upper cover plate, and multiple end plates. The lower cover plate, the upper cover plate, and the multiple end plates are connected to form a housing. The module is disposed inside the housing. A thermally conductive gel layer is provided between the module and the lower cover plate, and a fiberglass plate is provided between the module and the upper cover plate.

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