CN216529089U

CN216529089U - Battery cover plate assembly, battery and vehicle

Info

Publication number: CN216529089U
Application number: CN202122664493.7U
Authority: CN
Inventors: 魏剑锋; 王飞飞; 鄢勇; 汤道毅; 李强
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-05-13
Anticipated expiration: 2031-11-02

Abstract

The utility model belongs to the technical field of batteries, and relates to a battery cover plate assembly, a battery and a vehicle, which comprise a conductive terminal, an upper plastic part, a light cover plate and a pole column, wherein the upper plastic part is tightly pressed on the top surface of the light cover plate; go up the bottom of plastic part and encircle the second through-hole and be provided with a plurality of draw-in grooves, the top of light apron is provided with around the third through-hole and is provided with a plurality of bosss that the plastic part protrusion just spaced each other towards, in each boss card goes into the draw-in groove that corresponds, when conductive terminal receives external force, can drive plastic part and rotate together to the whole rotation together of battery cover plate subassembly, nevertheless because the opening part at the casing of battery is fixed to battery cover plate subassembly, take place relative rotation for the light apron in order to restrict conductive terminal.

Description

Battery cover plate assembly, battery and vehicle

Technical Field

The utility model belongs to the technical field of batteries, and relates to a battery cover plate assembly, a battery and a vehicle.

Background

The battery cover plate assembly is an important constituent of the battery and can protect the battery when the battery is short-circuited externally. In order to prevent the cover plate assembly from rotating and losing its function when being subjected to external force or internal force, thereby preventing the battery from having a short life or safety problem, some existing battery cover plate assemblies are provided with an anti-rotation structure.

For example, in an anti-rotation structure design of a conventional lithium battery cover plate structure with a safety protection structure, an upper portion of a cover plate assembly hole is provided with a flanging portion protruding outwards and turning over, an insulating pad comprises an inner shell and an outer shell, an annular clamping groove is formed by the inner shell and the outer shell in a surrounding mode, the flanging portion of the cover plate assembly hole is clamped into the annular clamping groove, and a supporting table surface for the flanging portion to be pressed downwards is arranged on the surface of the inner wall of the outer shell. The flanging part is an outward-flanged annular sawtooth-shaped flanging, and the supporting table top is provided with spaced protruding parts matched with the flanging part notch structure. The gear surface is arranged on the circumferential surface of the upper end of the positive pole rivet rod-shaped part, the gear ring matched with the gear surface is arranged on the surface of the inner ring of the positive pole insulating pad, and the positive pole insulating pad and the positive pole rivet are prevented from rotating relatively through the matching of the gear surface and the gear ring. The outward-turned sawtooth flanging is arranged on the cover plate to provide fastening pressure for the positive and negative insulating pads, tightly press the positive and negative insulating pads on the cover plate and provide torsion stopping force, so that the stability and firmness of the installation of the positive and negative assemblies are greatly improved; the torsion stopping is realized through gear faces arranged on the circumferential surfaces of the positive and negative rivets and a gear ring arranged inside the positive and negative insulating pads, the turn-up portion is arranged on the cover plate and is set into a turn-up annular sawtooth-shaped turn-up edge, and the torsion stopping is realized through interval protruding portions in annular supporting surfaces in the positive and negative insulating pads, so that the torsion stopping of the battery cover plate is obtained.

Although the existing anti-rotation structure of the cover plate assembly can improve the stability and the firmness of the cover plate assembly, the eversion annular sawtooth flanging structure is complex and can be produced only by adopting a machining mode, the material utilization rate is low, and the production cost is high. In addition, since the flanging structure is turned outwards, the assembly of the flanging structure and the insulating block is difficult, the assembly time is long, and the production efficiency is low. In addition, the gear ring on the rivet is matched with the gear ring of the insulating block, so that the precision requirement is high, the working procedures and the cost are increased, and the cost of the cover plate assembly is increased.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: aiming at the problem that the existing battery cover plate assembly is complex in outward-turned annular sawtooth-shaped flanging structure, the battery cover plate assembly, the battery and the vehicle are provided.

In order to solve the above technical problems, in one aspect, the present invention provides a battery cover plate assembly. The battery cover plate assembly comprises a conductive terminal, an upper plastic part, a light cover plate and a pole column, wherein the upper plastic part is tightly pressed on the top surface of the light cover plate, the top of the upper plastic part is provided with an installation groove, the conductive terminal is fixed in the installation groove, the conductive terminal is provided with a first through hole, the upper plastic part is provided with a second through hole, the light cover plate is provided with a third through hole, the first through hole, the second through hole and the third through hole are sequentially communicated, the pole column is inserted into the first through hole, the second through hole and the third through hole, and the top end of the pole column is fixed in the first through hole;

go up the bottom of plastic part and encircle the second through-hole is provided with a plurality of draw-in grooves, the top of light apron is encircleed the third through-hole is provided with the orientation go up the protruding and a plurality of bosss of mutual interval of plastic part, each the boss card is gone into correspondingly in the draw-in groove, with the restriction go up the relative rotation of plastic part and light apron.

Optionally, the top end of the pole is riveted in the first through hole; and/or the top end of the pole is welded with the inner wall of the first through hole.

Optionally, the position of the optical cover plate corresponding to the upper plastic part is thinned to form a thinned groove which is back to the recess of the upper plastic part, and the bottom of the upper plastic part is embedded and compressed in the thinned groove to realize the installation and positioning of the upper plastic part on the optical cover plate;

the third through hole is located the intermediate position of attenuate recess, the boss by the bottom of attenuate recess to it buckles to form to go up the plastic part.

Optionally, the battery cover plate assembly further comprises a lower plastic part and a battery core connecting sheet, the bottom end of the pole column is fixed on the battery core connecting sheet, the lower plastic part is arranged on the bottom surface of the optical cover plate, a mounting groove matched with the battery core connecting sheet in shape is formed in the bottom surface of the lower plastic part, and the battery core connecting sheet is mounted in the mounting groove.

Optionally, a fourth through hole is formed in the lower plastic part, a fifth through hole is formed in the battery cell connecting piece, the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole are communicated in sequence to form a pole mounting hole, and the pole is mounted in the pole mounting hole.

Optionally, the pole comprises a top end cylindrical part, a bottom end cylindrical part and a flange connected between the top end cylindrical part and the bottom end cylindrical part, the fifth through hole comprises a welding hole and an assembling hole connected to the bottom of the welding hole, the inner diameter of the welding hole is larger than that of the assembling hole so as to form a step surface at the connection position of the welding hole and the assembling hole, and the lower surface of the flange is pressed against the step surface and welded with the inner wall of the welding hole;

the top end cylindrical portion is accommodated in the first through hole, the second through hole, the third through hole, and the fourth through hole, the flange is accommodated in the welding hole, and the bottom end cylindrical portion is accommodated in the fitting hole.

Optionally, the battery cover plate assembly further includes a sealing ring, the sealing ring is sleeved on the periphery of the top end cylindrical portion and clamped between the top surface of the flange and the bottom surface of the optical cover plate, and the sealing ring is located in the fourth through hole.

Optionally, the battery cover plate assembly further comprises an explosion-proof valve and an explosion-proof valve protection pad, the optical cover plate is provided with an explosion-proof valve mounting hole, the explosion-proof valve is mounted on the explosion-proof valve mounting hole, and the explosion-proof valve protection pad is arranged on the top surface of the explosion-proof valve;

and a pressure relief hole is formed in the lower plastic part and is positioned below the explosion-proof valve mounting hole.

In the battery cover plate assembly provided by the embodiment of the utility model, the bottom of the upper plastic part is provided with a plurality of clamping grooves around the second through hole, the top of the optical cover plate is provided with a plurality of bosses which protrude towards the upper plastic part and are spaced from each other around the third through hole, each boss is clamped into the corresponding clamping groove, and when the conductive terminal is subjected to external force, the upper plastic part is driven to rotate together, so that the battery cover plate assembly integrally rotates together, but the battery cover plate assembly is fixed at the opening of the shell of the battery so as to limit the conductive terminal to rotate relative to the optical cover plate. Compared with the existing outward-turning annular sawtooth-shaped flanging, the structure is simple. And, a plurality of bosss can be realized through stamping forming, low in production cost, production efficiency is high. Go up plastic part and light apron and pass through the cooperation of boss and draw-in groove and realize, the equipment is easy, the assemble time is short.

On the other hand, the embodiment of the utility model also provides a battery, which comprises a shell, a battery core and the battery cover plate assembly, wherein the battery core is accommodated in the shell, and the battery cover plate assembly is arranged at the top opening of the shell.

On the other hand, the embodiment of the utility model also provides a vehicle which comprises the battery cover plate assembly.

Drawings

Fig. 1 is an exploded view of a battery cover plate assembly according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a battery cover plate assembly provided in accordance with one embodiment of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a schematic view of a light cover plate of a battery cover plate assembly according to an embodiment of the present invention;

FIG. 5 is an enlarged view at B in FIG. 4;

fig. 6 is a schematic view of an upper plastic part of a battery cover plate assembly according to an embodiment of the present invention;

FIG. 7 is an enlarged view at C of FIG. 6;

fig. 8 is a schematic diagram of a battery according to an embodiment of the utility model.

The reference numerals in the specification are as follows:

100. a battery cover plate assembly;

1. a conductive terminal; 11. a first through hole;

2. applying a plastic part; 21. installing a groove; 22. a second through hole; 23. a card slot;

3. a light cover plate; 31. a third through hole; 32. a boss; 33. thinning the groove;

4. a pole column; 41. a top cylindrical portion; 42. a bottom cylindrical portion; 43. a flange;

5. a plastic part is put; 51. a fourth via hole; 52. a pressure relief vent;

6. connecting the battery cell; 61. a fifth through hole; 611. welding the hole; 612. an assembly hole;

7. a seal ring; 8. an explosion-proof valve; 9. an explosion-proof valve protection pad;

200. a housing.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 1 to 7, a battery cover plate assembly 100 according to an embodiment of the present invention includes a conductive terminal 1, an upper plastic part 2, a light cover plate 3, and a terminal post 4, where the upper plastic part 2 is pressed against a top surface of the light cover plate 3, a mounting groove 21 is disposed at a top of the upper plastic part 2, the conductive terminal 1 is fixed in the mounting groove 21, the conductive terminal 1 is provided with a first through hole 11, the upper plastic part 2 is provided with a second through hole 22, the light cover plate 3 is provided with a third through hole 31, the first through hole 11, the second through hole 22, and the third through hole 31 are sequentially communicated, the terminal post 4 is inserted into the first through hole 11, the second through hole 22, and the third through hole 31, and a top end of the terminal post 4 is fixed in the first through hole 11.

Go up plastic part 2's bottom and encircle second through-hole 22 is provided with a plurality of draw-in grooves 23, the top of light apron 3 is encircleed third through-hole 31 is provided with the orientation go up 2 protruding and a plurality of bosss 32 of mutual spaced, each boss 32 card income corresponds in the draw-in groove 23, when conductive terminal 1 receives external force, can drive plastic part 2 and rotate together to battery cover plate subassembly 100 wholly rotates together, nevertheless because the opening part at the casing of battery is fixed to battery cover plate subassembly 100 to restriction conductive terminal 1 takes place relative rotation for light apron 3.

In one embodiment, the conductive terminal 1 is an aluminum block.

In one embodiment, each boss 32 is snapped into a corresponding slot 23 and secured by riveting.

In an embodiment, the top end of the pole 4 is riveted in the first through hole 11, and the top end of the pole 4 is welded with the inner wall of the first through hole 11. The terminal post 4 and the conductive terminal 1 can be completely fixed by adopting a riveting and welding mode.

Of course, in other embodiments, the top end of the pole may be riveted in the first through hole without welding. Or the top end of the pole is welded with the inner wall of the first through hole without riveting.

In an embodiment, light apron 3 corresponds go up the position attenuate of plastic part 2 to form dorsad go up the sunken attenuate recess 33 of plastic part 2, go up the bottom embedding of plastic part 2 and compress tightly in attenuate recess 33, in order to realize go up plastic part 2 and be in the installation location of light apron 3.

Third through hole 31 is located the intermediate position of attenuate recess 33, boss 32 by attenuate recess 33 the bottom to it buckles to form to go up plastic part 2. The thinning groove 33 is beneficial to punch forming of the boss 32, so that the bending thickness is reduced, and the bending R angle is also reduced.

In an embodiment, the battery cover plate assembly 100 further includes a lower plastic member 5 and a battery cell connecting plate 6, the bottom end of the pole 4 is fixed on the battery cell connecting plate 6, the lower plastic member 5 is disposed on the bottom surface of the optical cover plate 3, a mounting groove (not shown) having a shape matching the battery cell connecting plate 6 is disposed on the bottom surface of the lower plastic member 5, and the battery cell connecting plate 6 is mounted in the mounting groove.

In an embodiment, the lower plastic part 5 is provided with a fourth through hole 51, the cell connecting sheet 6 is provided with a fifth through hole 61, the first through hole 11, the second through hole 22, the third through hole 31, the fourth through hole 51 and the fifth through hole 61 are sequentially communicated with each other to form a pole mounting hole (not shown), and the pole 4 is mounted in the pole mounting hole.

In one embodiment, the pole 4 includes a top cylindrical portion 41, a bottom cylindrical portion 42, and a flange 43 connected between the top cylindrical portion 41 and the bottom cylindrical portion 42, the fifth through hole 61 includes a welding hole 611 and a fitting hole 612 connected to the bottom of the welding hole 611, the inner diameter of the welding hole 611 is larger than the inner diameter of the fitting hole 612, so as to form a step surface (not shown) at the connection position of the two, and the lower surface of the flange 43 is pressed against the step surface and welded to the inner wall of the welding hole 611.

When the electric core expands to transmit force to the electric core connecting sheet 6 connected with the electric core connecting sheet, the electric core connecting sheet 6 is welded with the pole column 4, so that the pole column 4 is driven to rotate, the conductive terminal 1 welded with the upper end of the pole column 4 is driven to rotate, the conductive terminal 1 drives the plastic part 2 to rotate, but the lug boss 32 is clamped into the corresponding clamping groove 23 and the battery cover plate component 100 is fixed at the opening of the shell of the battery, so that the electric core connecting sheet 6 is limited to rotate relative to the optical cover plate 3.

The top end cylindrical portion 41 is accommodated in the first through hole 11, the second through hole 22, the third through hole 31, and the fourth through hole 51, the flange 43 is accommodated in the welding hole 611, and the bottom end cylindrical portion 42 is accommodated in the fitting hole 612.

In an embodiment, the battery cover plate assembly 100 further includes a sealing ring 7, the sealing ring 7 is sleeved on the outer periphery of the top end cylindrical portion 41 and clamped between the top surface of the flange 43 and the bottom surface of the optical cover plate 3, and the sealing ring 7 is located in the fourth through hole 51. The sealing ring 7 is positioned below the thinning groove 33, so that the conductive terminal 1 can better compress the sealing ring 7, and a better sealing effect is achieved.

In an embodiment, the battery cover plate assembly 100 further includes an explosion-proof valve 8 and an explosion-proof valve protection pad 9, the optical cover plate 3 is provided with an explosion-proof valve mounting hole, the explosion-proof valve 8 is mounted on the explosion-proof valve mounting hole, and the explosion-proof valve protection pad 9 is disposed on the top surface of the explosion-proof valve 8.

And a pressure relief hole 52 is formed in the lower plastic part 5 below the mounting hole of the explosion-proof valve 8. The pressure release hole 52 communicates with the explosion-proof valve 8, and can discharge gas generated inside the battery through the explosion-proof valve 8.

According to the battery cover plate assembly provided by the embodiment of the utility model, the bottom of the upper plastic part is provided with the plurality of clamping grooves around the second through hole, the top of the optical cover plate is provided with the plurality of bosses which protrude towards the upper plastic part and are spaced from each other around the third through hole, each boss is clamped into the corresponding clamping groove, and when the conductive terminal is subjected to external force, the upper plastic part is driven to rotate together, so that the battery cover plate assembly integrally rotates together, but the battery cover plate assembly is fixed at the opening of the shell of the battery so as to limit the conductive terminal to rotate relative to the optical cover plate. Compared with the existing outward-turning annular sawtooth-shaped flanging, the structure is simple. And, a plurality of bosss can be realized through stamping forming, low in production cost, production efficiency is high. Go up plastic part and light apron and pass through the cooperation of boss and draw-in groove and realize, the equipment is easy, the assemble time is short.

In addition, an embodiment of the present invention further provides a battery, as shown in fig. 8, which includes a casing 200, a battery cell (not shown in the figure) accommodated in the casing 200, and the battery cover assembly 100 of the above embodiment, where the battery cover assembly 100 is disposed at a top opening of the casing 200.

In addition, an embodiment of the present invention further provides a vehicle, which includes the battery cover plate assembly 100 of the above embodiment.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A battery cover plate assembly is characterized by comprising a conductive terminal, an upper plastic part, a light cover plate and a pole, wherein the upper plastic part is tightly pressed on the top surface of the light cover plate, the top of the upper plastic part is provided with an installation groove, the conductive terminal is fixed in the installation groove, the conductive terminal is provided with a first through hole, the upper plastic part is provided with a second through hole, the light cover plate is provided with a third through hole, the first through hole, the second through hole and the third through hole are sequentially communicated, the pole is inserted in the first through hole, the second through hole and the third through hole, and the top end of the pole is fixed in the first through hole;

2. The battery cover plate assembly of claim 1, wherein the top end of the pole is riveted in the first through hole; and/or the top end of the pole is welded with the inner wall of the first through hole.

3. The battery cover plate assembly of claim 1, wherein the position of the optical cover plate corresponding to the upper plastic part is thinned to form a thinned groove which is recessed back to the upper plastic part, and the bottom of the upper plastic part is embedded and pressed in the thinned groove to realize the installation and positioning of the upper plastic part on the optical cover plate;

4. The battery cover plate assembly of claim 1, further comprising a lower plastic part and a battery cell connecting plate, wherein the bottom end of the pole is fixed on the battery cell connecting plate, the lower plastic part is disposed on the bottom surface of the optical cover plate, the bottom surface of the lower plastic part is provided with a mounting groove matched with the battery cell connecting plate in shape, and the battery cell connecting plate is mounted in the mounting groove.

5. The battery cover plate assembly according to claim 4, wherein a fourth through hole is formed in the lower plastic part, a fifth through hole is formed in the battery cell connecting piece, the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole are sequentially communicated with each other to form a pole mounting hole, and the pole is mounted in the pole mounting hole.

6. The battery cover plate assembly according to claim 5, wherein the pole comprises a top cylindrical part, a bottom cylindrical part and a flange connected between the top cylindrical part and the bottom cylindrical part, the fifth through hole comprises a welding hole and a fitting hole connected to the bottom of the welding hole, the inner diameter of the welding hole is larger than that of the fitting hole so as to form a step surface at the connection part of the welding hole and the fitting hole, and the lower surface of the flange is pressed against the step surface and welded with the inner wall of the welding hole;

7. The battery cover plate assembly of claim 6, further comprising a sealing ring sleeved on the periphery of the top cylindrical portion and clamped between the top surface of the flange and the bottom surface of the optical cover plate, the sealing ring being located in the fourth through hole.

8. The battery cover plate assembly of claim 4, further comprising an explosion-proof valve and an explosion-proof valve protection pad, wherein the optical cover plate is provided with an explosion-proof valve mounting hole, the explosion-proof valve is mounted on the explosion-proof valve mounting hole, and the explosion-proof valve protection pad is arranged on the top surface of the explosion-proof valve;

9. A battery comprising a housing, a cell contained within the housing, and the cell cover assembly of any of claims 1-8 disposed at a top opening of the housing.

10. A vehicle comprising the battery cover plate assembly of any one of claims 1-8.