CN220122013U - Battery module and battery box comprising same - Google Patents

Abstract

The utility model discloses a battery module and a battery box comprising the battery module. The battery module includes: a battery cell; at least two end plates which are arranged in sequence, wherein two adjacent end plates are oppositely arranged; the side panel, the end plate and the side panel are surrounded to form a containing frame body for containing and limiting the battery cell; wherein, a connecting lug is formed on one of the end plate and the side panel, an inserting port is formed on the other of the end plate and the side panel, the connecting lug is inserted into the inserting port, and the connecting lug is extruded and deformed to be fixed on the inserting port, thereby realizing the fixed connection of the end plate and the side panel; so, need not to use additional fastener, hold the framework shaping simple, can remain the pretightning force of equipment, compare in screwed connection or welding rod connection or rivet connection, joint strength between end plate and the side board is higher, does not have the fatigue risk of fastening, holds the framework and can bear the expansion force that the electricity core produced in charge-discharge cycle in-process better to have better suppression effect to the expansion of electricity core.

Description

Battery module and battery box comprising same

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module and a battery box comprising the battery module.

Background

The battery module comprises a containing frame body and a plurality of battery cells positioned in the containing frame body, wherein the battery cells expand in the charge-discharge cycle process, so that the containing frame body is required to contain the battery cells and limit the battery cells to inhibit the expansion of the battery cells; the accommodating frame body comprises an end plate and a side plate, the end plate and the side plate are connected through screws or welding rods or rivets, the problem that fastening fatigue and insufficient connection strength are easy to occur at the connecting position of the end plate and the side plate, and the accommodating frame body is easy to cause that the expansion of the battery cell cannot be well restrained.

Disclosure of Invention

In order to overcome at least one defect of the prior art, the utility model provides a battery module and a battery box comprising the battery module, and aims to solve the problems that fastening fatigue and insufficient connection strength are easy to occur at the connection part of an end plate and a side plate.

The utility model adopts the technical proposal for solving the problems that:

a battery module, comprising: a battery cell; at least two end plates which are sequentially arranged, wherein two adjacent end plates are oppositely arranged; the side plates are surrounded by the end plates and the side plates to form a containing frame body for containing and limiting the battery cells; the connecting lugs are extruded and deformed to be fixed on the plug-in ports, so that the fixed connection of the end plate and the side panels is realized.

According to the battery module, the accommodating frame body has a limiting effect on the battery cell, the accommodating frame body can bear the expansion force of the battery cell and inhibit the expansion of the battery cell, and importantly, the connecting lugs and the inserting ports are formed between the end plates and the side panels so as to realize the fixed connection of the end plates and the side panels, no additional fasteners are needed, the accommodating frame body is simple to form, the assembled pretightening force can be reserved, compared with the screw connection or the welding rod connection or the rivet connection, the connecting strength between the end plates and the side panels is higher, the fastening fatigue risk is avoided, the accommodating frame body can bear the expansion force of the battery cell in the charge-discharge cycle process better, and therefore the expansion of the battery cell is inhibited better.

According to some embodiments of the utility model, the connecting lug comprises a first section and a second section which are oppositely arranged, the first section and the second section penetrate through the plug-in port, the first section is extruded and deformed to be fixed at one end of the plug-in port, and the second section is extruded and deformed to be fixed at the other end of the plug-in port.

According to some embodiments of the utility model, the connecting lug further comprises a third section connected between the first section and the second section, wherein deformation spaces are formed around the first section, the second section and the third section, and the third section is deformed by extrusion so as to be fixed on the side panel.

According to some embodiments of the utility model, the first section is arcuate and concave towards the second section, and/or the second section is arcuate and concave towards the first section.

According to some embodiments of the utility model, the third segment is arcuate and projects away from the deformation space.

According to some embodiments of the utility model, a positioning opening for positioning is formed on the surface of the end plate facing away from the battery cell.

According to some embodiments of the utility model, the battery module further comprises a heat dissipation plate, and the heat dissipation plate is sandwiched between two adjacent battery cells.

According to some embodiments of the utility model, a plurality of heat dissipation teeth are arranged in the heat dissipation plate.

In addition, the utility model also provides a battery box, which comprises a box body and the battery module, wherein the battery module is arranged in the box body.

According to some embodiments of the utility model, the battery box further comprises a liquid cooling module, and the liquid cooling module is arranged on the side wall of the box body.

Drawings

Fig. 1 is a schematic view of a battery module (when an end plate and a side plate are not connected) according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a schematic structural view of a battery module according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of part B of FIG. 3;

fig. 5 is a schematic structural view of a battery box according to an embodiment of the present utility model;

fig. 6 is an exploded view of a battery case according to an embodiment of the present utility model.

Wherein the reference numerals have the following meanings:

the battery comprises a 1-battery module, a 10-battery core, a 11-end plate, a 111-positioning opening, a 12-side plate, a 13-connecting lug, a 131-first section, a 132-second section, a 133-third section, a 14-plug interface, a 15-heat dissipation plate, 151-heat dissipation teeth, a 16-heat conduction insulating sheet, a 2-box body, a 21-convex hull, a 22-heat dissipation rib, a 3-liquid cooling module, a 31-liquid flow channel, a 32-liquid inlet, a 33-liquid outlet and a 4-box cover.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 to 6, the utility model discloses a battery module 1 and a battery box comprising the battery module 1. The battery box further comprises a box cover 4, a box body 2 and a liquid cooling module 3, wherein a plurality of battery modules 1 are arranged in the box body 2, the liquid cooling module 3 is arranged between the box body 2 and the battery modules 1 to radiate heat of the battery modules 1, and the box cover 4 is arranged on the box body 2 in a covering manner; it should be noted that, in some other embodiments, the battery box may also, but not limited to, include an air cooling module, so that the air cooling module may be added or substituted for the liquid cooling module 3 to dissipate heat from the battery module 1.

As shown in fig. 1 to 4, specifically, in the present embodiment, the battery module 1 includes a battery cell 10, two end plates 11, and several side plates 12. The two end plates 11 are oppositely arranged; the side panels 12 are arranged between the two end plates 11, and the end plates 11 and the side panels 12 are surrounded to form a containing frame body for containing and limiting the battery cells 10.

It should be noted that, in some other embodiments, the number of end plates 11 may be, but is not limited to, 3, 4, 5, etc., and two adjacent end plates 11 may be opposite to each other; the side panels 12 may be connected to the end plates 11, or the side panels 12 may be disposed between two adjacent end plates 11, which may be selected according to actual production requirements.

Further, a connecting lug 13 is formed on one of the end plate 11 and the side plate 12, and an inserting port 14 is formed on the other of the end plate 11 and the side plate 12, specifically, in this embodiment, the opposite sides of the end plate 11 are respectively protruded to form the connecting lugs 13, the two ends of the side plate 12 are respectively formed with inserting ports 14, the connecting lugs 13 are respectively inserted into the inserting ports 14 in a one-to-one correspondence manner, and the connecting lugs 13 are extruded and deformed to be fixed on the inserting ports 14, so that the fixed connection of the end plate 11 and the side plate 12 is realized.

In the battery module 1 provided in this embodiment, the accommodating frame body has a limiting effect on the battery cell 10, so that the accommodating frame body can bear the expansion force of the battery cell 10 and inhibit the expansion of the battery cell 10; importantly, because the connecting lugs 13 and the inserting ports 14 are formed between the end plate 11 and the side plate 12 to realize the fixed connection of the end plate 11 and the side plate 12, no additional fasteners are needed, the forming of the accommodating frame is simple, the pre-tightening force of the assembly can be reserved, compared with the screw connection or the welding rod connection or the rivet connection, the connecting strength between the end plate 11 and the side plate 12 is higher, the risk of fastening fatigue is avoided, the accommodating frame can better bear the expansion force generated by the battery cell 10 in the charge-discharge cycle process, and therefore, the expansion of the battery cell 10 is better inhibited.

Specifically, in the present embodiment, the both end plates 11 are disposed parallel to each other; indeed, in some other embodiments, the two end plates 11 may be inclined at a certain angle, so long as the two end plates 11 are capable of suppressing the expansion of the battery cells.

Specifically, in this embodiment, the accommodating frame body is rectangular, the two end plates 11 are located at two ends of the accommodating frame body in the length direction, the plurality of side panels 12 are respectively distributed at two sides of the accommodating frame body in the width direction, the length direction of the accommodating frame body is defined as a first direction, the width direction of the accommodating frame body is defined as a second direction, the plurality of battery cells 10 can be sequentially arranged and stacked in the accommodating frame body along the first direction, the two end plates 11 can inhibit expansion of the plurality of battery cells 10 in the first direction, and the plurality of side panels 12 can inhibit expansion of the plurality of battery cells 10 in the second direction.

As shown in fig. 1, 2 and 4, preferably, in order to further increase the connection strength between the end plate 11 and the side panel 12, in this embodiment, the connecting lug 13 includes a first segment 131 and a second segment 132 that are disposed opposite to each other, the first segment 131 and the second segment 132 each penetrate through the socket 14, the first segment 131 is deformed by extrusion to be fixed at one end of the socket 14, and the second segment 132 is deformed by extrusion to be fixed at the other end of the socket 14, so that each connecting lug 13 is respectively fixed at two ends of the socket 14 after being deformed by extrusion, so as to achieve double fixation between the connecting lug 13 and the socket 14, thereby achieving the purpose of further increasing the connection strength between the end plate 11 and the side panel 12.

Preferably, in order to apply a pressing force to the connecting lug 13 to deform and fix the connecting lug 13 in the socket 14, in this embodiment, the connecting lug 13 further includes a third segment 133, the third segment 133 is connected to an end of the first segment 131 and an end of the second segment 132, the first segment 131, the second segment 132 and the third segment 133 enclose a deformation space, the third segment 133 is used for the pressing device to apply the pressing force, and the third segment 133 is deformed by pressing to fix the side panel 12. So, the existence in deformation space can make engaging lug 13 receive the extrusion and take place to warp more easily to reduce the degree of difficulty of being fixed in interface 14 with engaging lug 13, specifically, when applys the extrusion force to third section 133, first section 131 and second section 132 all take place to buckle, and the direction of buckling of first section 131 is opposite with the direction of buckling of second section 132, and the first section 131 after buckling takes place can the centre gripping be fixed in the one end of interface 14, and the second section 132 after buckling takes place can the centre gripping be fixed in the other end of interface 14.

Preferably, in the present embodiment, the first section 131, the second section 132 and the third section 133 are all arc-shaped, and the arc-shaped first section 131, the second section 132 and the third section 133 are more beneficial to the overall deformation of the connecting ear 13 when receiving the extrusion force, so as to ensure the deformation continuity of the connecting ear 13, so as to avoid the problem that the connecting ear 13 breaks when undergoing rigid deformation.

It should be noted that, in some other embodiments, the first segment 131, the second segment 132, and the third segment 133 may be, but not limited to, a zigzag shape, a straight shape, a serpentine shape, or the like, and may be selected according to actual production requirements, which is not limited only herein.

Preferably, in the present embodiment, the first segment 131 is recessed toward the second segment 132 to form an arc shape, the second segment 132 is recessed toward the first segment 131 to form an arc shape, and the third segment 133 is protruded away from the deformation space to form an arc shape; in this way, on one hand, the bending deformation of the first segment 131 and the second segment 132 caused by extrusion is facilitated, and the first segment 131 can be clamped and fixed at one end of the socket 14 more easily after bending deformation, and the second segment 132 can be clamped and fixed at the other end of the socket 14 more easily after bending deformation; on the other hand, the relative distance between the first segment 131 and the second segment 132 can be made smaller, and the size of the socket 14 can be correspondingly reduced; in yet another aspect, it may be convenient for the technical equipment to apply a compressive force to the third section 133, during which the third section 133 may be gradually flattened and secured to the side panel 12.

As shown in fig. 3 and 6, further, in order to facilitate the assembled battery module 1 to be installed into the case 2, in this embodiment, a positioning opening 111 for positioning is formed on a surface of the end plate 11 facing away from the battery core 10, a convex hull 21 corresponding to the positioning opening 111 is protruded on an inner wall of the case 2, and the convex hull 21 may be embedded into the positioning opening 111, so that the convex hull 21 and the positioning opening 111 are disposed, on one hand, to facilitate guiding and positioning for the battery module 1 when the battery module 1 is installed into the case 2, thereby avoiding the problem of potential safety hazards of the battery module 1 due to installation dislocation, and on the other hand, the cooperation of the convex hull 21 and the positioning opening 111 may play a role in radiating the battery module 1 during operation.

As shown in fig. 1, further, in order to enhance the heat dissipation effect on the battery cells 10, in this embodiment, the battery module 1 further includes a heat dissipation plate 15 and a heat conducting insulating sheet 16, where the heat dissipation plate 15 is sandwiched between two adjacent battery cells 10 to absorb the heat generated by the battery cells 10; specifically, in this embodiment, the battery box is laterally placed, opposite side surfaces of the heat dissipation plate 15 are in contact with two adjacent cells 10 in a one-to-one correspondence, the bottom surfaces of the heat dissipation plate 15 and the cells 10 are flush in the horizontal direction, the heat conduction insulating sheet 16 is attached to the bottom surfaces of the heat dissipation plate 15 and the cells 10, and the heat conduction insulating sheet 16 is also simultaneously in contact with the bottom wall of the box 2 to transfer heat of the heat dissipation plate 15 and the cells 10 to the box 2.

Preferably, in the present embodiment, a plurality of heat dissipation teeth 151 are disposed in the heat dissipation plate 15 to efficiently absorb heat generated by the battery cell 10, and preferably, the heat dissipation plate 15 and the heat dissipation teeth 151 are integrally extruded from aluminum materials to improve the overall structural strength and heat dissipation performance.

As shown in fig. 6, specifically, in the present embodiment, the liquid cooling module 3 is disposed on the bottom wall of the case 2, the heat conducting and insulating sheet 16 of the battery module 1 may contact the liquid cooling module 3, and the heat conducting and insulating sheet 16 may transfer the heat of the heat dissipating plate 15 and the battery cell 10 to the liquid cooling module 3 to achieve the heat dissipating function; therefore, a part of heat generated by the operation of the battery module 1 can be directly transferred to the air after being transferred to the side wall of the box body 2, and another part of heat generated by the operation of the battery module 1 can be taken away by the liquid cooling module 3, and it can be understood that when the ambient temperature is lower, the battery module 1 can be reversely heated by the liquid cooling module 3 so as to ensure that the battery module 1 can still work normally in a low-temperature environment.

More specifically, the liquid cooling module 3 includes a liquid flow passage 31, a liquid inlet 32, a liquid outlet 33, and a cooling liquid; the liquid flow channel 31 has a serpentine shape to increase the contact area with the heat conductive and insulating sheet 16, thereby improving the heat dissipation effect; the cooling liquid flows in the liquid flow channel 31, and the liquid inlet 32 and the liquid outlet 33 are arranged on the box body 2 and are communicated with two ends of the liquid flow channel 31 in a one-to-one correspondence manner so as to realize the circulating flow of the cooling liquid. Preferably, the liquid flow channels 31 are manufactured using a friction welding process, and the shapes of the liquid flow channels 31 can be flexibly arranged according to the heat distribution of the battery module 1.

Preferably, in the present embodiment, the case 2 is integrally formed by die casting of aluminum, so that the case 2 has the advantages of simple processing, high heat dissipation efficiency, good processing consistency, and the like; and, be formed with a plurality of heat dissipation muscle 22 on the lateral wall of box 2, this heat dissipation muscle 22 can improve the heat exchange efficiency between box 2 and the outside air, can form simultaneously again and support in order to increase the overall structure intensity of box 2 to prevent the problem of box 2 deformation because of the inflation of battery module 1.

Specifically, in the present embodiment, the number of the battery modules 1 is two, and it is understood that the two battery modules 1 generally need to be additionally provided with a connection aluminum row and a fastening screw for connection; preferably, after the two battery modules 1 are fixed in the case 2, the whole is laser welded, so that, on one hand, there is no need to additionally add a connecting aluminum row and fastening screws between the two battery modules 1 when connecting the two battery modules 1; on the other hand, the internal resistance and the pressure drop of the connection between the two battery modules 1 can be reduced, which is beneficial to improving the consistency of the whole product. It should be noted that, in some other embodiments, the number of the battery modules 1 may be, but is not limited to, three, four, five, or the like, which is not limited only herein.

In summary, the battery module 1 and the battery box including the battery module 1 disclosed by the utility model have at least the following beneficial technical effects:

1) The connecting lugs 13 and the inserting ports 14 are formed between the end plate 11 and the side plate 12 to realize the fixed connection of the end plate 11 and the side plate 12, no additional fastening piece is needed, the forming of the accommodating frame body is simple, and the pre-tightening force of the assembly can be reserved;

2) The connection strength between the end plate 11 and the side plate 12 is higher, the risk of fastening fatigue is avoided, and the accommodating frame body can better bear the expansion force generated by the battery cell 10 in the charge-discharge cycle process, so that the expansion of the battery cell 10 is better inhibited;

3) Each connecting lug 13 is respectively fixed at two ends of the inserting port 14 so as to realize double fixation between the connecting lug 13 and the inserting port 14, thereby achieving the purpose of further increasing the connection strength between the end plate 11 and the side plate 12;

4) The deformation space is formed, so that the connecting lug 13 is easier to deform when being extruded, and the difficulty of fixing the connecting lug 13 on the inserting port 14 is reduced;

5) The arc-shaped first section 131, the second section 132 and the third section 133 are more beneficial to the integral deformation of the connecting lug 13 when the connecting lug 13 is subjected to extrusion force, and can ensure the deformation continuity of the connecting lug 13 so as to avoid the problem that the connecting lug 13 breaks when undergoing rigid deformation;

6) The convex hull 21 and the positioning opening 111 are arranged, so that guiding and positioning are conveniently provided for the battery module 1 when the battery module 1 is arranged in the box body 2, and a certain heat dissipation function can be achieved when the battery module 1 works.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. The battery module, its characterized in that includes:

a battery cell (10);

at least two end plates (11) which are sequentially arranged, wherein two adjacent end plates (11) are oppositely arranged;

the side plates (12), the end plates (11) and the side plates (12) are surrounded to form a containing frame body for containing and limiting the battery cells (10);

wherein, end plate (11) with be formed with engaging lug (13) on one of them side board (12), end plate (11) with be formed with grafting mouth (14) on the other of side board (12), engaging lug (13) are inserted and are located grafting mouth (14), engaging lug (13) are pressed and are warp in order to be fixed in grafting mouth (14), thereby realize end plate (11) with the fixed connection of side board (12).

2. The battery module according to claim 1, wherein the connecting lug (13) includes a first section (131) and a second section (132) that are disposed opposite to each other, the first section (131) and the second section (132) both penetrate through the plug port (14), the first section (131) is deformed by extrusion so as to be fixed to one end of the plug port (14), and the second section (132) is deformed by extrusion so as to be fixed to the other end of the plug port (14).

3. The battery module according to claim 2, wherein the connecting lug (13) further comprises a third section (133), the third section (133) is connected between the first section (131) and the second section (132), deformation spaces are formed around the first section (131), the second section (132) and the third section (133), and the third section (133) is deformed by extrusion so as to be fixed to the side panel (12).

4. A battery module according to claim 3, characterized in that the first section (131) is arc-shaped and is recessed towards the second section (132) and/or the second section (132) is arc-shaped and is recessed towards the first section (131).

5. The battery module according to claim 4, wherein the third segment (133) is arc-shaped and protrudes in a direction away from the deformation space.

6. The battery module according to any one of claims 1 to 5, wherein a positioning opening (111) for positioning is formed in a surface of the end plate (11) facing away from the battery cell (10).

7. The battery module according to any one of claims 1 to 5, wherein the battery module (1) further comprises a heat dissipation plate (15), and the heat dissipation plate (15) is sandwiched between two adjacent cells (10).

8. The battery module according to claim 7, wherein a plurality of heat dissipation teeth (151) are provided in the heat dissipation plate (15).

9. Battery box, characterized in that it comprises a box body (2), and further comprises a battery module (1) according to any one of claims 1-8, wherein the battery module (1) is arranged in the box body (2).

10. The battery box according to claim 9, further comprising a liquid cooling module (3), wherein the liquid cooling module (3) is provided on a side wall of the box body (2).