Battery module with heating film

Abstract

The utility model discloses a battery module with heating films, which comprises a battery cell group, end plates are respectively arranged on the front side and the rear side of the battery cell group, the heating films are respectively arranged on the left side and the right side of the battery cell group, the heating films extend along the front-back direction, and each heating film comprises a film body attached to the side surface of the battery cell group. Lugs are arranged on the front side and the rear side of the film body respectively, the two lugs correspond to the two end plates one to one, and the lugs are connected with the end plates through clamping pieces; the method has the advantages of being good in stability and safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy batteries, and in particular relates to a battery module with a heating film. Background Art

[0002] With the popularity of electric vehicles, the use environment of electric vehicles is also increasing, such as low temperature environment. As the power source of electric vehicles, the battery module generally includes a battery cell group and two end plates arranged at the front and rear ends of the battery cell group. In order to improve the adaptability of the battery module to low temperature environments, combined with the actual use conditions of the vehicle, and taking into account the requirements of cost reduction and lightweight of the vehicle, the market currently mostly adopts the method of installing a heating film on the side of the battery module to make the battery cell work at a suitable temperature to meet the energy output and power output of the vehicle.

[0003] Conventionally, the heating film is usually pasted and fixed on the left and right sides of the battery pack and the left and right sides of the end plate. The heating film extends in the front-to-back direction and generates heat when powered on. The heat can be transferred to the battery pack to increase the working temperature of the battery pack. However, due to the height difference between the end plate and the battery pack when the battery module is installed, it is difficult to control the end plate and the battery pack on the same plane, resulting in poor stability of the heating film fixation. In addition, the heating film is fixed with double-sided tape, which will accelerate aging after being heated. The reduced viscosity after aging may cause the heating film to fall off, and there is even a risk of the heating film burning dry. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a battery module with a heating film, which has good stability and safety.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a battery module with a heating film, including a battery cell group, end plates are respectively arranged on the front and rear sides of the battery cell group, heating films are respectively arranged on the left and right sides of the battery cell group, and the heating film extends along the front and rear directions. The heating film includes a film body attached to the side of the battery cell group, and lugs are respectively arranged on the front and rear sides of the film body, two of the lugs correspond to the two end plates one by one, and the lugs are connected to the end plates through a clamping piece.

[0006] Preferably, a cavity is provided on the end plate, two first perforations are provided on the left and right sides of the end plate respectively, the two first perforations on the same side are distributed up and down, two second perforations corresponding to the two first perforations are provided on the lug, and the clip includes two buckles corresponding to the two first perforations, and the buckles pass through the second perforations and the first perforations in sequence and are inserted into the cavity of the end plate.

[0007] Preferably, the buckle includes a rod body, a pressing head is provided at one end of the rod body, and a plurality of barbs are integrally provided on the side of the rod body. The other end of the rod body passes through the second through-hole and the first through-hole in sequence and is inserted into the cavity of the end plate, the barbs abut against the inner wall of the end plate cavity, and the pressing head presses on the lug.

[0008] Preferably, a guide block is provided at the other end of the rod body, and an end of the guide block away from the rod body is provided with an inclined guide surface.

[0009] Preferably, the pressing head comprises a circular sheet and a rubber ring, the inner ring of the rubber ring is fixedly connected to the side surface of the circular sheet, and the rubber ring is inclined from the inside to the outside and in the direction where the rod body is located.

[0010] Preferably, the second through hole is a waist-shaped hole extending along the front-to-back direction.

[0011] Preferably, the membrane body includes a heating layer and an insulating layer covering both sides of the heating layer, the insulating layer is provided with a through hole, the heating layer is provided with a notch connected to the through hole, the through hole and the notch constitute the second perforation, and the buckle is located in the notch.

[0012] Preferably, a PC film is attached to the side of the lug facing the end plate.

[0013] Preferably, the heating film further comprises a connector and a power supply line, and one end of the power supply line is connected to a side of one of the lugs away from the film body through the connector.

[0014] Preferably, a connector is provided on the power supply line, and the power supply line is connected to a side of the end plate away from the battery cell group through the connector.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] 1. The use of clips to replace traditional double-sided tape has better high temperature resistance, is not dependent on the viscosity of the adhesive, can maintain a stable connection strength, has better stability, and thus prevents the heating film from falling off and avoids dry burning of the heating film, which has better safety;

[0017] 2. Compared with double-sided tape, the clamping parts will not leave residual adhesive on the surface of the end plate, which is convenient for later replacement and maintenance;

[0018] 3. The installation and removal of the clips are relatively convenient, and there is no need to wait for the adhesive to dry, nor does it involve tedious steps such as surface cleaning, which helps save time and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the buckle in the utility model;

[0022] Figure 4 The partial cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the explosion structure of the membrane body in the utility model;

[0024] Figure 6 The partial cross-sectional structure of the utility model is shown in FIG. Figure 2 .

[0025] In the figure: 1. battery cell group; 2. end plate; 21. cavity; 22. first perforation; 23. convex rib; 231. flange; 3. heating film; 31. film body; 311. heating layer; 3111. notch; 312. insulating layer; 3121. through hole; 32. lug; 321. second perforation; 33. connector; 34. power supply line; 4. snap-fit; 41. buckle; 411. rod body; 412. pressing head; 4121. circular sheet; 4122. rubber ring; 413. barb; 414. guide block; 4141. inclined guide surface; 5. PC film; 51. third perforation; 6. connector; 61. connecting seat; 62. bundling seat; 63. cable tie. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] Embodiment 1: Figure 1 and Figure 2As shown, a battery module with a heating film includes a cell group 1, end plates 2 are respectively arranged on the front and rear sides of the cell group 1, heating films 3 are respectively arranged on the left and right sides of the cell group 1, the heating film 3 extends along the front and rear directions, the heating film 3 includes a film body 31 attached to the side of the cell group 1, lugs 32 are respectively arranged on the front and rear sides of the film body 31, the two lugs 32 correspond to the two end plates 2 one by one, and the lugs 32 are connected to the end plates 2 through the clamping parts 4.

[0029] By using the clip 4 to replace the traditional double-sided tape, the high temperature resistance is better, it is not dependent on the viscosity of the adhesive, can maintain a stable connection strength, and has better stability, thereby preventing the heating film 3 from falling off and avoiding dry burning of the heating film 3, and having better safety.

[0030] Embodiment 2: Figures 2 to 4 As shown, the rest of the parts are the same as those of the first embodiment, except that a cavity 21 is provided on the end plate 2, two first through-holes 22 are provided on the left and right sides of the end plate 2, and the two first through-holes 22 on the same side are distributed up and down, and two second through-holes 321 corresponding to the two first through-holes 22 are provided on the lug 32, and the clip 4 includes two buckles 41 corresponding to the two first through-holes 22, and the buckles 41 pass through the second through-holes 321 and the first through-holes 22 in sequence and are inserted into the cavity 21 of the end plate 2. Among them, a plurality of cavities 21 are provided on the end plate 2, and the first through-hole 22 on the left side is connected to the cavity 21 on the left side, and the first through-hole 22 on the right side is connected to the cavity 21 on the right side.

[0031] In this embodiment, the buckle 41 includes a rod body 411, a pressing head 412 is provided at one end of the rod body 411, and a plurality of barbs 413 are integrally provided on the side of the rod body 411. The other end of the rod body 411 passes through the second through hole 321 and the first through hole 22 in sequence and is inserted into the cavity 21 of the end plate 2. The barbs 413 abut against the inner wall of the cavity 21 of the end plate 2, and the pressing head 412 presses on the lug 32.

[0032] In this embodiment, a guide block 414 is provided at the other end of the rod body 411, and an inclined guide surface 4141 is provided at one end of the guide block 414 away from the rod body 411. The guide block 414 is provided to facilitate the staff to quickly insert the buckle 41 into the cavity 21.

[0033] In this embodiment, the pressing head 412 includes a circular piece 4121 and a rubber ring 4122. One end of the rod body 411 is fixedly connected to the center of the circular piece 4121. The inner ring of the rubber ring 4122 is fixedly connected to the side of the circular piece 4121. The rubber ring 4122 is inclined from the inside to the outside and in the direction of the rod body 411. The rubber ring 4122 has a certain elasticity and cooperates with the barb 413. The rubber ring 4122 and the barb 413 are respectively abutted on two surfaces of the end plate 2 to prevent the buckle 41 from moving, and the stability is good.

[0034] Furthermore, the pressing head 412 , the rod body 411 , the barbs 413 , and the guide block 414 are integrally formed.

[0035] Embodiment 3: Figure 2 , Figure 4 and Figure 5 As shown, the rest of the parts are the same as those of the second embodiment, except that the second through hole 321 is a waist-shaped hole extending in the front-to-back direction, which helps to absorb the expansion changes of the battery module during use.

[0036] In this embodiment, the membrane body 31 includes a heating layer 311 and an insulating layer 312 covering both sides of the heating layer 311, the insulating layer 312 is provided with a through hole 3121, and the heating layer 311 is provided with a notch 3111 connected to the through hole 3121. The corresponding through hole 3121 and the notch 3111 form a second through hole 321, and the buckle 41 is located in the notch 3111 to reduce the impact of the heat generated by the membrane body 31 on the buckle 41, which helps to extend the service life of the buckle 41.

[0037] Embodiment 4: Figure 1 , Figure 4 and Figure 5 As shown, the rest of the parts are the same as those of the first embodiment, except that a PC film 5 is attached to the side of the lug 32 facing the end plate 2, wherein the PC film 5 is provided with a third through hole 51 for the clamping member 4 to pass through. The PC film 5 is a polycarbonate film, which has the characteristics of high strength, high temperature resistance, chemical corrosion resistance and insulation, and helps to further improve the wear resistance and insulation of the lug 32.

[0038] In this embodiment, the heating film 3 further includes a connector 33 and a power supply line 34 , and one end of the power supply line 34 is connected to a side of a lug 32 away from the film body 31 through the connector 33 .

[0039] Embodiment 5: Figure 6 As shown, the rest of the parts are the same as those of the fourth embodiment, except that a connector 6 is provided on the power supply line 34, and the power supply line 34 is connected to the end plate 2 through the connector 6 and is away from the battery cell group 1 (see Figure 1) is connected to one side of the power supply line 34, and by setting the connecting piece 6, the power supply line 34 is arranged in an orderly manner along the specified path, avoiding the cross entanglement of the power supply line 34 and improving the stability of the power supply line 34.

[0040] Furthermore, the connecting member 6 includes a connecting seat 61 , a bundling seat 62 and a tie 63 which are connected in sequence. The connecting seat 61 is used to connect to a side of the end plate 2 away from the battery cell group 1 , and the tie 63 is used to bundle the power supply line 34 .

[0041] When the connection seat 61 is a fir-tree-shaped connection head (not shown in the figure), the connection piece 6 is a conventional fir-tree-shaped cable tie on the market, and a connection hole (not shown in the figure) is provided on the side of the corresponding end plate 2 away from the battery cell group 1, and the connection head is connected to the connection hole.

[0042] When the connection seat 61 is a plastic buckle, the plastic buckle is set in a U-shape, and a plurality of barbs are set in the U-shaped groove of the plastic buckle. A rib 23 is set on the side of the corresponding end plate 2 away from the battery cell group 1, and a flange 231 is integrally set at the head of the rib 23. The plastic buckle is buckled on the rib 23, and the plurality of barbs in the U-shaped groove abut against the side of the rib 23. When the plastic buckle moves away from the end plate 2, the barbs in the U-shaped groove will abut against the flange 231, and the flange 231 is used to prevent the plastic buckle from being separated from the rib 23. Compared with the fir-tree type cable tie, the plastic buckle can move along the length direction of the rib 23 to adjust the position, has better flexibility, and is more convenient to disassemble and assemble.

[0043] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A battery module with a heating film, comprising a battery cell group (1), the battery cell group (1) being provided with end plates (2) on both the front and rear sides, respectively, and the battery cell group (1) being provided with heating films (3) on both the left and right sides, respectively, the heating films (3) extending in the front-to-back direction, characterized in that The heating film (3) comprises a film body (31) attached to the side of the battery cell group (1), and lugs (32) are respectively provided on the front and rear sides of the film body (31), and the two lugs (32) correspond to the two end plates (2) one by one, and the lugs (32) are connected to the end plates (2) via a clamping piece (4); The heating film (3) further comprises a connector (33) and a power supply line (34); one end of the power supply line (34) is connected to a side of the lug (32) away from the film body (31) through the connector (33); a connecting piece (6) is provided on the power supply line (34); and the power supply line (34) is connected to a side of the end plate (2) away from the battery cell group (1) through the connecting piece (6); The connecting member (6) comprises a connecting seat (61), a bundling seat (62) and a cable tie (63) which are connected in sequence; the connecting seat (61) is a U-shaped plastic buckle; a plurality of barbs are arranged in the U-shaped groove of the plastic buckle; a convex rib (23) is arranged on the side of the end plate (2) away from the battery cell group (1); a flange (231) is integrally arranged at the head of the convex rib (23); the plastic buckle is buckled on the convex rib (23); and a plurality of barbs in the U-shaped groove of the plastic buckle abut against the side of the convex rib (23).

2. A battery module with a heating film according to claim 1, characterized in that The end plate (2) is provided with a cavity (21), and two first through holes (22) are respectively provided on the left and right sides of the end plate (2), and the two first through holes (22) on the same side are distributed up and down, and the lug (32) is provided with two second through holes (321) corresponding to the two first through holes (22) in a one-to-one manner, and the clamping component (4) includes two buckles (41) corresponding to the two first through holes (22) in a one-to-one manner, and the buckles (41) are inserted into the cavity (21) of the end plate (2) after passing through the second through holes (321) and the first through holes (22) in sequence.

3. A battery module with a heating film according to claim 2, characterized in that The buckle (41) comprises a rod body (411), one end of which is provided with a pressing head (412), and the side surface of the rod body (411) is integrally provided with a plurality of barbs (413), the other end of the rod body (411) sequentially passes through the second through hole (321) and the first through hole (22) and is inserted into the cavity (21) of the end plate (2), the barbs (413) abut against the inner wall of the cavity (21) of the end plate (2), and the pressing head (412) presses on the lug (32).

4. A battery module with a heating film according to claim 3, characterized in that A guide block (414) is provided at the other end of the rod body (411), and an end of the guide block (414) away from the rod body (411) is provided with an inclined guide surface (4141).

5. The battery module with a heating film according to claim 3, characterized in that The pressing head (412) comprises a circular sheet (4121) and a rubber ring (4122), wherein the inner ring of the rubber ring (4122) is fixedly connected to the side surface of the circular sheet (4121), and the rubber ring (4122) is inclined from the inside to the outside and in the direction where the rod body (411) is located.

6. A battery module with a heating film according to claim 2, characterized in that The second through hole (321) is a waist-shaped hole extending along the front-to-back direction.

7. The battery module with a heating film according to claim 2, characterized in that The membrane body (31) comprises a heating layer (311) and an insulating layer (312) covering both sides of the heating layer (311); the insulating layer (312) is provided with a through hole (3121); the heating layer (311) is provided with a notch (3111) connected to the through hole (3121); the through hole (3121) and the notch (3111) constitute the second through hole (321); and the buckle (41) is located in the notch (3111).

8. The battery module with a heating film according to claim 1, characterized in that A PC film (5) is attached to the side of the lug (32) facing the end plate (2).

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