CN207896144U - A kind of power battery box and electric vehicle - Google Patents

Abstract

The utility model relates to the technical field of power batteries, and specifically discloses a power battery box, which includes a box body and a plurality of battery modules arranged in the box body, and each of the battery modules includes several battery modules arranged in a row. A battery cell, a sheet support is arranged between two adjacent battery cells in each of the battery modules, and the two adjacent battery cells are clamped between the two battery cells located between the two battery cells. The sheet support; one end of the sheet support is connected to the bottom wall of the box. In the utility model, the electric core is clamped on the thin sheet support, and the thin sheet support is connected to the box to realize the fixing of the electric core. The thin sheet support has a simple structure and small weight, which can obviously reduce the weight of the power battery box. The battery cell is connected to the box through the sheet bracket. If a single cell fails, remove the sheet bracket from the box and replace it with a new battery or replace both the battery cell and the sheet bracket at the same time. It is easy to disassemble and easy for after-sales maintenance. An electric vehicle is also provided.

Description

A power battery box and an electric vehicle

technical field

The utility model relates to the technical field of power batteries, in particular to a power battery box and an electric vehicle.

Background technique

With the formulation of relevant standards and specifications for vehicle power battery systems, the state has formulated corresponding subsidy policies to rapidly promote the lightweight development of power battery systems. Aluminum alloys and composite materials are commonly used in the industry as brackets for fixing battery cells to reduce system weight. However, with the continuous changes of national policies, the widespread use of new materials can no longer meet the requirements for power batteries.

In the prior art, in order to reduce the weight of the power battery box, the bracket for fixing the battery cell is canceled, and the two adjacent battery cells, and the battery cell and the battery body are directly bonded and fixed by structural glue.

However, the disadvantage of the existing technology is that, although the weight of the battery is reduced, once a single battery cell fails, it is difficult to disassemble the entire battery module, it is difficult to maintain after-sales, and the maintenance cost is high.

Utility model content

One of the purposes of the present utility model is to provide a power battery box to reduce the later maintenance cost of the battery.

For this purpose, the utility model adopts the following technical solutions:

A power battery box, including a box, and a plurality of battery modules arranged in the box, each of the battery modules includes a number of batteries arranged in a row, each of the battery modules A thin sheet support is arranged between two adjacent electric cores, and two adjacent electric cores are clamped on the thin sheet support between the two electric cores; one end of the thin sheet support is connected to the bottom wall of the box.

Preferably, each of the battery modules is bound by a cable tie. Improve the connection strength of the battery cells in the battery module.

Preferably, the sheet support includes a thin plate, and corner guards connected to the four corners of the thin plate, one side of the battery cell is in contact with the thin plate, and the battery core is corresponding to the corner guard. The position is clipped to the corner guard, and one end of the corner guard close to the bottom wall of the box body is connected to the bottom wall of the box body.

Preferably, a through hole is provided on the thin plate, an adhesive is provided at a position corresponding to the through hole of the electric core, and the electric core located on both sides of each thin plate is bonded by the adhesive.

The adhesive glues the two adjacent battery cells, and after the battery cells are clamped to the corner guard, only a small amount of adhesive agent is required to improve the connection strength of the two adjacent battery cells, and A small amount of adhesive will not affect cell removal and replacement.

Preferably, each of the battery modules further includes end plates arranged at both ends of the cell arrangement direction, the end plates are connected to the box, and each of the battery modules is connected to the end plates. The adjacent cells are fastened to the end plate.

The battery cells at one end of the battery module are clamped to the end plate, and the end plate is connected to the box body, which can realize the reinforcement of the battery module along the direction of battery cell arrangement.

Preferably, a longitudinal bead is provided along the cell arrangement direction, and one side of the longitudinal bead abuts against the corner;

A plurality of the battery modules are arranged in parallel, the end plates at the same end of the plurality of battery modules are connected with a transverse bead, and the two ends of the longitudinal bead along the cell arrangement direction are connected to the transverse bead.

Setting the horizontal bead can realize the connection between multiple battery modules, and reduce the shaking of the battery modules in the direction perpendicular to the arrangement of the battery cells and along the direction of the height of the battery cells. The longitudinal bead can realize the fixation of two adjacent battery modules along the arrangement direction of the cells, and reduce the shaking of the cells along the direction of arrangement and along the height of the cells.

Preferably, both ends of the battery module are provided with screw rods, and the screw rods pass through the longitudinal bead, the transverse bead and the end plate, and are screwed into the bottom wall of the box.

The connection between the longitudinal bead, the transverse bead, the end plate and the bottom wall of the box is realized by the screw, the connection structure is simple and the installation and disassembly are convenient.

Preferably, the battery module is provided with heat-regulating fins along the arrangement direction of the battery cells. The heat regulator is used to effectively manage the heat of the power battery box and improve the service life of the battery.

As a preference, the bottom wall of the box is provided with a gluing groove, and an adhesive is arranged in the gluing groove, and the corner guard close to the bottom wall of the box is fixed to the bottom wall of the box by the adhesive. bottom wall.

The sheet bracket is connected to the lower box by gluing. The connection method is simple and will not increase the weight of the battery. The gluing groove is convenient for automatic equipment gluing, and it is also conducive to the flow of the glue remover in the gluing groove during disassembly, which can be quickly Replace the module.

Another object of the present utility model is to provide an electric vehicle to reduce the later maintenance cost of the battery of the electric vehicle.

For this purpose, the utility model adopts the following technical solutions:

An electric vehicle includes the above-mentioned power battery box.

The beneficial effects of the utility model:

In the utility model, the electric core is clamped on the thin sheet support, and the thin sheet support is connected to the box to realize the fixing of the electric core. The thin sheet support has a simple structure and small weight, which can obviously reduce the weight of the power battery box. The cells are connected to the box through the sheet bracket. If a single cell fails, remove the sheet bracket from the box and replace it with a new cell or replace both the cell and the sheet bracket at the same time. It is easy to disassemble and maintain after sales. Low maintenance costs.

Description of drawings

Fig. 1 is the structural representation of power battery case of the present utility model;

Fig. 2 is an exploded schematic view of the electric core and the sheet support in the utility model;

Fig. 3 is a structural schematic diagram of the battery cell in the utility model clamped on the sheet support and an adhesive is arranged on one side of the battery cell;

Fig. 4 is an exploded schematic view of the battery module in the utility model;

Fig. 5 is an exploded schematic view of the power battery box of the present utility model;

Fig. 6 is a schematic structural view of the power battery box in the utility model when the box body is not fastened;

Fig. 7 is the enlarged view of place A in Fig. 6;

Fig. 8 is a schematic structural view of the gluing tank in the present invention.

In the picture:

11, the lower box; 111, the glue tank; 12, the upper box;

2. Cells;

3. Sheet support; 31. Thin plate; 32. Corner guard; 321. First connecting plate; 322. Second connecting plate;

4. End plate; 41. Clamping part; 5. Screw; 6. Cable tie; 7. Heat regulator; 8. Longitudinal bead; 9. Transverse bead; 10. Adhesive.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. For the convenience of description, the accompanying drawings only show some structures related to the utility model but not all structures.

This preferred embodiment provides a power battery box to reduce the later maintenance cost of the power battery box and reduce the weight of the power battery box in terms of structural design.

Some orientation words are defined in this utility model. In the absence of any contrary description, the orientation words used such as "up", "down", "the height direction of the electric core" and "the arrangement direction of the electric core" refer to the The newly provided power battery box is defined under normal use, the "height direction of the battery cells" is consistent with that shown in "H" in Figure 2, and the "arrangement direction of the battery cells" is shown in "L" in Figure 4 consistent. These orientation words are adopted for ease of understanding, and thus do not constitute a limitation of the protection scope of the present utility model.

As shown in Figures 1-5, the power battery box provided by this embodiment includes a box body and a plurality of battery modules arranged in the box body, each battery module group includes a number of battery cells 2 arranged in a row, each A sheet support 3 is provided between two adjacent battery cells 2 in the battery module, and two adjacent battery cells 2 are clamped on the sheet support 3 between the two battery cells; one end of the sheet support 3 is connected to the The bottom wall of the box.

In this embodiment, the battery cell 2 is clamped on the sheet support 3, and the sheet support 3 is connected to the box to realize the fixing of the battery cell 2. The sheet support has a simple structure and a small weight, which can significantly reduce the weight of the battery. The cell 2 is connected to the box through the sheet support 3. If a single cell 2 fails, remove the sheet support 3 from the box, and replace the new cell 2 or replace the cell 2 and the sheet support 3 at the same time. Simple, easy to maintain after sales, and low maintenance cost.

The sheet support 3 includes a thin plate 31 and corner guards 32 connected to the four corners of the thin plate 31 , one side of the battery cell 2 abuts against the thin plate 31 and the position corresponding to the battery cell 2 and the corner guard 32 is snapped to the corner guard 32 One end of the corner guard 32 close to the bottom wall of the box body is fixed on the bottom wall of the box body. The structure for clamping the cell 2 is only arranged on the four corners of the sheet 31, which can reduce the weight of the sheet support 3. The sheet support 3 is only composed of the sheet 31 and the corner guard 32, and the structure is simple and light. The sheet support 3 can be integrally formed, which is simple to manufacture and can avoid dimensional errors caused by assembly. It can be made of plastic, which is light in weight and can reduce the weight of the entire power battery box. The hardness of the plastic is low and will not damage the battery. The surface of the cell 2 causes wear. In addition, the sheet support 3 can also be made of metal materials such as aluminum or aluminum alloy with low density.

As shown in FIG. 1 , the box body includes a lower box body 11 and an upper box body 12 buckled with the lower box body 11 , and the upper box body 12 and the lower box body 11 are connected by screws. Both the lower box body 11 and the upper box body 12 are processed by sheet metal stamping or die-casting or sheet metal welding.

As shown in FIG. 2 , the corner guard 32 includes a first connecting plate 321 and a second connecting plate 322 , the first connecting plate 321 is connected to the second connecting plate 322 to form an L-shaped structure, and the openings of two adjacent corner guards 32 relative settings.

The first connecting plate 321 is connected with the upper end surface or the lower end surface of the thin plate 31, specifically, the first connecting plate 321 of the two corner guards 32 located at the upper end of the thin plate 31 is connected with the upper end surface of the thin plate 31, and the two The first connecting plate 321 of the corner protector 32 is connected to the lower end surface of the thin plate 31 . The second connecting plate 322 is connected to the side surface of the thin plate 31 in the height direction, and the thin plate 31 is arranged at the middle position of the corner guard 32 along the direction in which the cells 2 are arranged, and the cells are clamped on both sides of the thin plate 31 along the direction in which the cells 2 are arranged. 2.

The thin plate 31 is arranged in the middle of the angle guard 32 along the direction in which the battery cells 2 are arranged, so that both sides of the thin plate 31 can clamp a battery 2 to reduce the number of sheet supports 3 and reduce the weight of the fixed structure. The battery cells 2 are all in contact with the first connection plate 321 , the second connection plate 322 and the thin plate 31 , so that the battery cells 2 are clamped to the sheet support 3 .

As shown in Figures 3 and 4, a through hole is provided on the thin plate 31, and an adhesive 10 is provided at the position corresponding to the through hole of the electric core 2, and the electric core 2 located on both sides of each thin plate 31 is bonded by the adhesive 10, and the same The two sides of the cell 2 along the arrangement direction of the cell 2 are clamped respectively to a sheet support 3, and the side of the cell 2 close to the thin plate 31 and facing the through hole is provided with an adhesive 10, so as to be connected with the adjacent Cell 2 is bonded. Specifically, the adhesive 10 can be partly provided at the position where the battery cell 2 faces the through hole, as long as two adjacent battery cells 2 are bonded together, it is convenient to replace the battery cell 2 . In this embodiment, the bonding of the adhesive 10 is only an auxiliary fixation, not a main fixation prevention, and the main fixation method is the sheet support 3 .

After the cell 2 is clamped to the corner protector 32 , only a small amount of adhesive 10 is required to improve the connection strength of two adjacent cells 2 , and a small amount of adhesive 10 will not affect the disassembly and replacement of the cell 2 . The battery cell 2 is limited by the sheet bracket 3 and bonded by the adhesive 10, which can reduce the hardware structure, the overall weight of the power battery box is light, it is easy to disassemble after-sales maintenance, the operation is simple, and the cost is saved.

As shown in FIG. 4 , each battery module is bound by a cable tie 6 to improve the connection strength of the battery cells 2 in the battery module. In this embodiment, two cable ties 6 are arranged at intervals along the height direction of the battery cells 2 , and each cable tie 6 is bundled around the battery module along the arrangement direction of the battery cells 2 to reinforce the entire battery module. The cable tie 6 can be made of metal or plastic.

Each battery module also includes end plates 4 arranged at both ends of the direction in which the battery cells 2 are arranged. The end plates 4 are connected to the lower box body 11, and the side of the end plate 4 close to the battery cells 2 is provided with a clamping portion 41. The cells 2 of the battery modules adjacent to each battery module and its end plate 4 are clamped to the end plate 4 . Specifically, the end plates 4 are connected to the lower case 11 through the screw rods 5 provided at both ends of the battery module, and each end plate 4 is vertically and spaced apart from two vertical through holes, each vertical through hole Screw rods 5 are perforated in the holes. The battery cell 2 at one end of the battery module is clamped to the end plate 4, and the end plate 4 is connected to the lower box 11, which can realize the reinforcement of the battery module along the arrangement direction of the battery cells 2, and the end plate 4 along the height direction of the battery cells 2 reinforcement. In this embodiment, the end plate 4 is integrally made of plastic.

As shown in Figures 5-7, a longitudinal bead 8 is provided along the direction in which the cells 2 are arranged. One side of the longitudinal bead 8 abuts against the corner 32. Specifically, the longitudinal bead 8 abuts against the first connection at the upper end of the thin plate 31. board 321. A plurality of battery modules are arranged in parallel, and a longitudinal bead 8 is arranged between two adjacent battery modules. The longitudinal bead 8 can realize the fixing of two adjacent battery modules along the arrangement direction of the battery cells 2, and reduce the shaking of the battery cells 2 along the arrangement direction and the height direction.

The end plates 4 at the same end of multiple battery modules are connected with transverse beading bars 9, and the two ends of the battery modules along the arrangement direction of the cells 2 are provided with transverse bedding bars, and the transverse bedding bars 9 are located at the end of the end plate 4 close to the upper box body 12, Both ends of the longitudinal bead 8 along the arrangement direction of the cells 2 are connected to the transverse bead 9 . Setting the horizontal bead 9 can realize the connection between multiple battery modules, and reduce the shaking of the battery modules along the direction perpendicular to the arrangement of the battery cells 2 and along the height direction of the battery cells 2 .

As shown in Figures 6 and 7, the longitudinal bead 8 is located above the transverse bead 9, and the screw 5 pierced through the end plate 4 is sequentially threaded through the longitudinal bead 8, the transverse bead 9 and the end plate 4, and screwed into the lower box 11 of the bottom wall. The connection between the longitudinal bead 8, the transverse bead 9, the end plate 4 and the bottom wall of the box is realized by the screw 5, the connection structure is simple and the installation and disassembly are convenient. The longitudinal bead 8 and the transverse bead 9 can increase the overall strength of the battery module.

In addition, one end of the end plate 4 close to the lower box body 11 can also be provided with a horizontal bead 9, and one end of the corner guard 32 close to the lower box body 11 can also be provided with a longitudinal bead 8, and the screw rod 5 passes through the end plate 4 and is sequentially installed on the The bottom wall of the horizontal bead 9, the longitudinal bead 8 and the lower casing 11. In this embodiment, the longitudinal bead 8 and the transverse bead 9 are made of metal, and the metal has high strength and is not easy to be broken.

As shown in Figure 4 and Figure 5, the battery module is provided with a heat-regulating fin 7 along the arrangement direction of the battery cells 2, and the heat-regulating fin 7 is located between the rolling strip 6 and the battery The sheet 7 abuts on the cell 2 . Specifically, the heat regulating fins 7 are heat sinks or heating fins, and the heating fins and heat sinks can be respectively installed in winter and summer, so as to facilitate effective thermal management of the power battery box and improve the service life of the battery.

As shown in Figure 5 and Figure 8, the bottom wall of the box body is provided with a glue coating groove 111, and an adhesive 10 is arranged in the glue coating groove 111, and the corner guard 32 close to the bottom wall of the lower box body 11 is fixed to the box body by the glue agent 10 bottom wall. The sheet support 3 is connected to the lower box body 11 by gluing, the connection method is simple and does not increase the weight of the battery, and the gluing groove 111 is provided to facilitate automatic equipment gluing.

When the battery cell 2 breaks down, the glue remover can be put into the glue coating groove 111 to separate the corner protector 32 from the lower box body 11 . In this implementation, the glue remover is liquid, easy to flow, insulated and non-corrosive, which facilitates the flow of the glue remover in the glue application tank 111 during disassembly, and can quickly replace the module.

The assembly sequence of the power battery box is as follows:

A plurality of battery cells 2 are sequentially clamped on the sheet support 3 to form a battery module, and one side of the battery cells 2 located at both ends of the battery module is clamped on the end plate 4 . Heat sinks or heating fins are arranged on both sides along the arrangement direction of the battery cells 2, and then the battery module is bound with cable ties 6. Adhesive 10 is set in the gluing tank 111 , the battery module is put into the preset position of the lower case 11 , and the adhesive 10 bonds the battery module and the lower case 11 . The longitudinal bead 8 and the transverse bead 9 are abutted to preset positions respectively, and the screw rod 5 is sequentially threaded through the longitudinal bead 8 , the transverse bead 9 , the end plate 4 and the bottom wall of the lower box 11 . Fasten the upper box body 12 to the lower box body 11, and connect the upper box body 12 and the lower box body 11 through screws.

This embodiment also provides an electric vehicle, which includes the above-mentioned power battery box.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (10)

1. A power battery box, comprising a box body, and a plurality of battery modules arranged in the box, each of the battery modules includes a plurality of battery cells (2) arranged in a row, characterized in that, A sheet support (3) is provided between two adjacent battery cells (2) in each battery module, and the two adjacent battery cells (2) are clamped between the two battery cells. The sheet support (3) between the cores; one end of the sheet support (3) is connected to the bottom wall of the box. 2. The power battery box according to claim 1, characterized in that, each of the battery modules is bound by a cable tie (6). 3. The power battery box according to claim 1 or 2, characterized in that, the sheet support (3) comprises a thin plate (31), and corner guards ( 32), one side of the cell (2) is in contact with the thin plate (31), and the position of the cell (2) corresponding to the corner (32) is snapped into the corner (32) ), one end of the corner guard (32) close to the bottom wall of the box is connected to the bottom wall of the box. 4. The power battery box according to claim 3, characterized in that, a through hole is provided on the thin plate (31), and an adhesive (10) is provided at the position corresponding to the through hole of the battery cell (2) , the battery cells (2) located on both sides of each thin plate (31) are bonded by the adhesive (10). 5. The power battery box according to claim 4, characterized in that, each of the battery modules further includes end plates (4) arranged at both ends of the direction in which the cells (2) are arranged, and the end plates (4) Connected to the box body, and the battery cells (2) adjacent to the end plate (4) of each battery module are clipped to the end plate (4). 6. The power battery box according to claim 5, characterized in that a longitudinal bead (8) is provided along the direction in which the cells (2) are arranged, and one side of the longitudinal bead (8) abuts against the corner guard (32); A plurality of the battery modules are arranged in parallel, the end plates (4) at the same end of the plurality of battery modules are connected with a horizontal bead (9), and the longitudinal bead (8) is arranged along the cells (2) Both ends in the cloth direction are connected to the transverse bead (9). 7. The power battery box according to claim 6, characterized in that, both ends of the battery module are provided with screw rods (5), and the screw rods (5) are pierced through the longitudinal bead (8), the The horizontal bead (9) and the end plate (4) are screwed into the bottom wall of the box. 8. The power battery box according to claim 2, characterized in that, the battery module is provided with heat-regulating fins (7) along the arrangement direction of the battery cells (2). 9. The power battery box according to claim 3, characterized in that, the bottom wall of the box body is provided with a gluing groove (111), and an adhesive (10) is arranged in the gluing groove (111), close to The corner guard (32) of the bottom wall of the box is fixed to the bottom wall of the box by the adhesive (10). 10. An electric vehicle, characterized in that it comprises the power battery box according to any one of claims 1-9.