Lithium battery cover plate and lithium battery

Abstract

The utility model relates to the technical field of batteries, and discloses a lithium battery cover plate and a lithium battery, the lithium battery cover plate comprises a base plate, a mounting seat, an insulating plate and a pole assembly, the base plate is provided with a first boss and a first groove, the first boss is located on the outer side of the first groove, a reinforcing rib is arranged in the first groove, the bottom of the mounting seat is provided with a second groove and a second boss, and the second boss is located in the second groove. The reinforcing rib is arranged in the first groove, the first boss is correspondingly arranged in the second groove, the second boss is correspondingly arranged in the first groove, and the two pole assemblies are respectively arranged in the first mounting hole, the second mounting hole and the third mounting hole. The first mounting hole is prevented from collapsing and twisting at a high temperature, and meanwhile, the first boss is arranged on the outer side of the first groove, so that the sectional area of the mounting seat for supporting the pole assembly is increased, the bending resistance is enhanced, the stability of the pole assembly is improved, and the pole assembly is prevented from collapsing in a high-temperature environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to lithium battery cover plate and lithium battery. BACKGROUND

[0002] Lithium battery is a kind of battery by lithium metal or lithium alloy as positive or negative electrode material, using non-aqueous electrolyte solution.Lithium battery is gradually widely applied due to its high energy density, no memory effect, long cycle life, environment-friendly and response rate fast advantage.

[0003] The cell of lithium battery is usually placed in a shell to form battery unit, cover plate is arranged on the shell to be closed, and electrical conduction is realized through electrical element arranged on the cover plate.

[0004] In prior art, in the manufacturing process of lithium battery, in order to remove the moisture in the cell, high-temperature baking treatment is needed.In this process, the light aluminum plate in the cover plate is deformed due to high temperature, which will cause the phenomenon of pole post down. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a kind of lithium battery cover plate and lithium battery to solve the problem that the light aluminum plate in the cover plate is deformed due to high temperature in prior art, which will cause the phenomenon of pole post down.

[0006] In the first aspect, the utility model provides a kind of lithium battery cover plate, comprising:

[0007] The substrate is provided with two first mounting holes, and the outer side of the first mounting hole on the substrate is provided with a first boss and a first groove, the first boss is located on the outer side of the first groove, and a reinforcing rib is arranged in the first groove;

[0008] The mounting seat is arranged above the first mounting hole, and the mounting seat is provided with a second mounting hole matched with the first mounting hole, and the bottom of the mounting seat is provided with a second groove and a second boss, the first boss is arranged in the second groove, and the second boss is arranged in the first groove;

[0009] The insulating plate is arranged below the substrate, and the insulating plate is provided with two third mounting holes matched with the first mounting hole;

[0010] The pole post assembly is arranged in the first mounting hole, the second mounting hole and the third mounting hole.

[0011] Beneficial effects: the utility model discloses a reinforcing rib is set up in the first recess, and the structural support and axial tension and compression of base plate are increased, the collapse and torsion of first mounting hole at high temperature are prevented, the first boss is set up at the outside of the first recess, the cross section of mounting seat to the support of pole column assembly is increased, and the bending capacity is strengthened, thereby the stability of pole column assembly is improved, and the collapse of pole column assembly under high temperature environment is avoided.

[0012] In an alternative embodiment, the reinforcing ribs are evenly arranged in the first recess.

[0013] Beneficial effects: the utility model discloses that the reinforcing rib is evenly arranged in the first recess, can increase the support and axial tension and compression of base plate at the edge of second mounting hole, thereby the support capacity to pole column assembly is improved, and the collapse of pole column assembly under high temperature environment is avoided.

[0014] In an alternative embodiment, the pole column assembly comprises a bottom plate and a pole column, the bottom plate is located at the side of the insulating plate away from the base plate, and the pole column is arranged on the bottom plate and installed in the first mounting hole, the second mounting hole and the third mounting hole.

[0015] In an alternative embodiment, a third boss is arranged on the inner wall of the mounting seat, a third recess matched with the third boss is arranged on the outer wall of the pole column, and the third boss is installed in the third recess.

[0016] Beneficial effects: the utility model discloses that the third boss and the third recess are matched and clamped, and the pole column can be stably installed in the mounting seat.

[0017] In an alternative embodiment, the pole column assembly further comprises a sealing member, the sealing member is arranged on the outer side of the pole column, and the sealing member abuts against the base plate and the mounting seat.

[0018] Beneficial effects: the utility model discloses that the sealing member is arranged, and the sealing property between the pole column and the base plate.

[0019] In an alternative embodiment, a mounting groove is arranged on the bottom of the base plate, a mounting portion is arranged on the top of the insulating plate, the mounting portion is installed in the mounting groove, and the third mounting hole is arranged on the mounting portion.

[0020] In an alternative embodiment, a step portion is arranged in the mounting groove, a flange is arranged at the edge of the third mounting hole, and the flange abuts against the step portion.

[0021] Beneficial effects: the utility model discloses that the flange of the insulating plate is clamped on the step portion, and the insulating plate can be stably installed with the fan.

[0022] In an alternative embodiment, a fourth mounting hole is arranged on the base plate, the fourth mounting hole is located between the two first mounting holes, a plurality of through holes are arranged on the insulating plate, the through holes are communicated with the fourth mounting hole, and an explosion-proof assembly is installed on the fourth mounting hole.

[0023] Beneficial effects: the utility model discloses a prevent explosion subassembly when lithium battery temperature exceeds certain threshold value, and prevent explosion subassembly will open automatically, release battery internal gas and heat, effectively prevent lithium battery overheat and cause explosion accident.

[0024] In an alternative embodiment, the first liquid injection hole is provided on the substrate, and the second liquid injection hole is provided on the insulating plate.

[0025] Beneficial effects: the utility model discloses the first liquid injection hole and second liquid injection hole fill in electrolyte liquid to the lithium battery inside conveniently.

[0026] Secondly, the utility model also provides a lithium battery, including the body and the lithium battery cover plate, and the lithium battery cover plate is installed on one side of the body.

[0027] Since the lithium battery adopts the lithium battery cover plate in the utility model, it has the same beneficial effects as the lithium battery cover plate, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings.

[0029] Figure 1 It is the explosion diagram of the lithium battery cover plate of the utility model embodiment;

[0030] Figure 2 It is the top view of the lithium battery cover plate of the utility model embodiment;

[0031] Figure 3 It is Figure 2 The sectional view of A-A direction in the middle;

[0032] Figure 4 Figure 3 The enlarged schematic view at B in the middle;

[0033] Figure 5 It is the bottom view of the lithium battery cover plate of the utility model embodiment;

[0034] Figure 6 It is the top view of the substrate in the lithium battery cover plate of the utility model embodiment;

[0035] Figure 7 Figure 6 The enlarged schematic view at C in the middle;

[0036] Figure 8 A bottom view of a base plate in a lithium battery cover plate according to an embodiment of the present application;

[0037] Figure 9 A perspective view of a mounting seat in a lithium battery cover plate according to an embodiment of the present application;

[0038] Figure 10 Another perspective view of the mounting seat in the lithium battery cover plate according to an embodiment of the present application;

[0039] Figure 11 A perspective view of a pole assembly in a lithium battery cover plate according to an embodiment of the present application;

[0040] Figure 12 A perspective view of an insulating plate in a lithium battery cover plate according to an embodiment of the present application.

[0041] Explanation of reference signs:

[0042] 1, base plate; 101, first mounting hole; 102, first boss; 103, first groove; 104, reinforcing rib; 105, mounting groove; 106, step portion; 107, fourth mounting hole; 108, first liquid injection hole;

[0043] 2, mounting seat; 201, second mounting hole; 202, second groove; 203, second boss; 204, third boss;

[0044] 3, insulating plate; 301, third mounting hole; 302, mounting portion; 303, flange; 304, through hole; 305, second liquid injection hole;

[0045] 4, pole assembly; 401, bottom plate; 402, pole; 403, third groove;

[0046] 5, sealing member;

[0047] 6, explosion-proof assembly. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0049] The embodiments of the present application will be described below in combination with Figures 1 to 12 the drawings.

[0050] According to embodiments of the present invention, on the one hand, such as Figures 1 to 12 As shown, a lithium battery cover is provided, including a substrate 1, a mounting base 2, an insulating plate 3, and an electrode assembly 4. The substrate 1 has two first mounting holes 101. The substrate 1 has a first boss 102 and a first groove 103 located outside the first mounting holes 101. The first boss 102 is located outside the first groove 103. The first groove 103 has a reinforcing rib 104. The two mounting bases 2 are correspondingly installed above the first mounting holes 101. The mounting base 2 has a second mounting hole 201 that matches the first mounting hole 101. The bottom of the mounting base 2 has a second groove 202 and a second boss 203. The first boss 102 is correspondingly installed in the second groove 202, and the second boss 203 is correspondingly installed in the first groove 103. The insulating plate 3 is disposed below the substrate 1. The insulating plate 3 has two third mounting holes 301 that match the first mounting holes 101. The two electrode assemblies 4 are respectively installed in the first mounting hole 101, the second mounting hole 201, and the third mounting hole 301.

[0051] Specifically, in this embodiment, the substrate 1 is not specifically limited. For example, in this embodiment, the substrate 1 is a rectangular aluminum plate. The substrate 1 has two symmetrically arranged first mounting holes 101. Two mounting seats 2 are installed on the same side of the substrate 1. The second mounting hole 201 corresponds to the first mounting hole 101. In this embodiment, the mounting seat 2 is not specifically limited. For example, in this embodiment, the mounting seat 2 is made of insulating plastic material. An insulating plate 3 is installed on the other side of the substrate 1 away from the mounting seat 2. The insulating plate 3 has two symmetrically arranged third mounting holes 301. In this embodiment, the insulating plate 3 is not specifically limited. For example, in this embodiment, the insulating plate 3 is made of insulating plastic material. The size of the insulating plate 3 matches the size of the substrate 1. In this embodiment, there are two pole post assemblies 4, one of which is a positive pole and the other is a negative pole. The two pole post assemblies 4 are respectively installed in the first mounting hole 101, the second mounting hole 201 and the third mounting hole 301 on the same side.

[0052] In this embodiment, as Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, a first boss 102 and a first groove 103 are provided on the outer side of the first mounting hole 101 on one side of the mounting base 2 on the substrate 1. The first boss 102 is located outside the first groove 103, and a reinforcing rib 104 is provided in the first groove 103. Correspondingly, as shown... Figure 9 and Figure 10As shown, the second groove 202 and the second boss 203 are arranged on the side of the mounting seat 2 in contact with the base plate 1, the first boss 102 is arranged in the second groove 202 in a corresponding manner, and the second boss 203 is arranged in the first groove 103 in a corresponding manner.

[0053] The utility model discloses a reinforcing rib 104 is arranged in the first groove 103, and the structural support and axial tension and compression of the base plate 1 are increased, the first mounting hole 101 is prevented from collapsing and twisting under high temperature, the first boss 102 is arranged on the outside of the first groove 103, the sectional area of the mounting seat 2 supporting the pole column assembly 4 is increased, and the bending resistance is enhanced, so that the stability of the pole column assembly 4 is improved, and the pole column assembly 4 is prevented from collapsing under high temperature.

[0054] In one embodiment, as shown in Figure 7 A plurality of reinforcing ribs 104 are evenly arranged in the first groove 103.

[0055] Specifically, in the first groove 103, a plurality of reinforcing ribs 104 are arranged circumferentially.

[0056] The utility model discloses a plurality of reinforcing ribs 104 are evenly arranged in the first groove 103, and the support and axial tension and compression of the base plate 1 at the edge of the second mounting hole 201 can be increased, so that the support ability of the pole column assembly 4 is improved, and the pole column assembly 4 is prevented from collapsing under high temperature.

[0057] In one embodiment, as shown in Figure 4 And Figure 11 As shown, the pole column assembly 4 includes a bottom plate 401 and a pole column 402, the bottom plate 401 is located on the side of the insulating plate 3 away from the base plate 1, the pole column 402 is arranged on the bottom plate 401, and the pole column 402 is arranged in the first mounting hole 101, the second mounting hole 201 and the third mounting hole 301.

[0058] Specifically, in the embodiment, the pole column 402 is in a cylindrical shape, the outer diameter of the pole column 402 matches the inner diameter of the first mounting hole 101, the second mounting hole 201 and the third mounting hole 301, the bottom plate 401 is in a rectangular shape, and one end of the pole column 402 is fixed to the bottom plate 401.

[0059] In one embodiment, as shown in Figures 9 to 11As shown, the inner wall of the mounting seat 2 is provided with a third boss 204, and the outer wall of the pole 402 is provided with a third groove 403 matched with the third boss 204, and the third boss 204 is installed in the third groove 403.

[0060] Specifically, in the embodiment, the third boss 204 and the third groove 403 are matched and clamped, so that the axial displacement of the pole 402 is limited.

[0061] The third boss 204 and the third groove 403 are matched and clamped, so that the pole 402 is stably installed in the mounting seat 2.

[0062] In one embodiment, as shown in Figure 1 , Figure 3 and Figure 4 , the pole assembly 4 further comprises a sealing piece 5, which is arranged on the outer side of the pole 402, and the sealing piece 5 abuts against the base plate 1 and the mounting seat 2.

[0063] Specifically, in the embodiment, the sealing piece 5 is arranged on the outer side of the pole 402 above the bottom plate 401, the cross section of the sealing piece 5 is in the shape of "L", the side of the first mounting hole 101 on the base plate 1 abuts against the side of the sealing piece 5, and the bottom of the mounting seat 2 abuts against the top of the sealing piece 5.

[0064] The sealing piece 5 is arranged between the pole 402 and the base plate 1.

[0065] In one embodiment, as shown in Figure 8 and Figure 12 , the bottom of the base plate 1 is provided with a mounting groove 105, the top of the insulating plate 3 is provided with a mounting portion 302, the mounting portion 302 is installed in the mounting groove 105, and the third mounting hole 301 is arranged on the mounting portion 302.

[0066] Specifically, in the embodiment, the bottom of the base plate 1 is provided with a mounting groove 105 recessed towards one side of the mounting seat 2, the top of the insulating plate 3 is provided with a mounting portion 302 protruding towards one side of the mounting seat 2, the mounting portion 302 is installed in the mounting groove 105, and the mounting portion 302 and the mounting groove 105 are matched to realize the positioning and installation between the base plate 1 and the insulating plate 3; the third mounting hole 301 is arranged on the mounting portion 302, and the bottom of the insulating plate 3 is provided with a second mounting groove, the size of the second mounting groove is matched with the bottom plate 401, and the bottom plate 401 is installed in the second mounting groove.

[0067] In one embodiment, as shown in Figure 8 and Figure 12 , the mounting groove 105 is provided with a stepped portion 106, and the edge of the third mounting hole 301 is provided with a flange 303 abutting against the stepped portion 106.

[0068] Specifically, the third mounting hole 301 in the embodiment is provided with a flange 303 protruding upward at the edge of the third mounting hole 301, and the flange 303 is in abutment with the stepped portion 106.

[0069] The flange 303 of the insulation plate 3 is clamped on the stepped portion 106, so that the insulation plate 3 is stably installed with the fan.

[0070] In one embodiment, as shown in Figure 1 , Figure 2 and Figure 8 , the fourth mounting hole 107 is arranged on the substrate 1 and located between the two first mounting holes 101, the insulation plate 3 is provided with a plurality of through holes 304 in communication with the fourth mounting hole 107, and the explosion-proof assembly 6 is installed on the fourth mounting hole 107.

[0071] Specifically, the fourth mounting hole 107 in the embodiment is not limited, for example, the fourth mounting hole 107 in the embodiment is in the shape of a waist, the fourth mounting hole 107 is located at the middle position of the substrate 1, the insulation plate 3 is provided with a plurality of through holes 304 in communication with the fourth mounting hole 107, and the explosion-proof assembly 6 is installed in the fourth mounting hole 107.

[0072] The explosion-proof assembly 6 in the embodiment is not limited, for example, the explosion-proof assembly 6 is an explosion-proof valve.

[0073] The explosion-proof assembly 6 is arranged in the utility model, when the temperature of the lithium battery exceeds a certain threshold value, the explosion-proof assembly 6 will automatically open to release the gas and heat inside the battery, effectively preventing the explosion accident caused by overheating of the lithium battery.

[0074] In one embodiment, as shown in Figure 6 , Figure 8 and Figure 12 , the first liquid injection hole 108 is arranged on the substrate 1, the second liquid injection hole 305 is arranged on the insulation plate 3, and the first liquid injection hole 108 is in communication with the second liquid injection hole 305.

[0075] Specifically, the first liquid injection hole 108 is arranged between the one first mounting hole 101 and the fourth mounting hole 107 on the substrate 1, and the second liquid injection hole 305 is correspondingly arranged on the insulation plate 3.

[0076] The first liquid injection hole 108 and the second liquid injection hole 305 are arranged in the utility model, which facilitates the filling of electrolyte liquid into the lithium battery.

[0077] According to the embodiment of the utility model, on the other hand, a lithium battery is also provided, which comprises a body and the above-mentioned lithium battery cover plate, and the lithium battery cover plate is installed on one side of the body.

[0078] Specifically, the body is internally provided with an electric core, a lithium battery cover plate is installed on one side of the body, and the electric core is electrically connected with a pole 402 on the lithium battery cover plate.

[0079] The utility model discloses a reinforcing rib 104 is set up in the first recess 103, and the structure supportability and axial tension and compression of base plate 1 are increased, prevent the first mounting hole 101 from appearing collapse and twist under high temperature, and first boss 102 is set up in the outside of first recess 103, and the section area that mounting seat 2 supports to pole column assembly 4 is increased, and the bending ability is strengthened, thereby improve the stability of pole column assembly 4, avoid the collapse of pole column assembly 4 under high temperature environment, and further guarantee the reliability of lithium battery.

[0080] Although the embodiments of the utility model are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A lithium battery cover plate, characterized in that, The utility model relates to a kind of battery terminal, including: Substrate (1), two first mounting holes (101) are provided on the substrate (1), first boss (102) and first groove (103) are provided on the substrate (1) outside the first mounting hole (101), the first boss (102) is located outside the first groove (103), reinforcing rib (104) is provided in the first groove (103); Mounting seat (2), two mounting seat (2) are correspondingly installed above the first mounting hole (101), second mounting hole (201) is provided on the mounting seat (2) and matched with the first mounting hole (101), second groove (202) and second boss (203) are provided on the bottom of mounting seat (2), the first boss (102) is correspondingly installed in the second groove (202), the second boss (203) is correspondingly installed in the first groove (103); Insulating plate (3), the insulating plate (3) is arranged below the substrate (1), two third mounting holes (301) matched with the first mounting hole (101) are provided on the insulating plate (3); Pole assembly (4), two pole assemblies (4) are respectively installed in the first mounting hole (101), the second mounting hole (201) and the third mounting hole (301).

2. The lithium battery cover plate of claim 1, wherein, Several reinforcing ribs (104) are evenly arranged in the first groove (103).

3. The lithium battery cover plate according to claim 1 or 2, characterized in that, The pole assembly (4) includes: Bottom plate (401), the bottom plate (401) is located on the side of the insulating plate (3) away from the substrate (1); Pole (402), the pole (402) is arranged on the bottom plate (401), and the pole (402) is installed in the first mounting hole (101), the second mounting hole (201) and the third mounting hole (301).

4. The lithium battery cover plate of claim 3, wherein, Third boss (204) is provided on the inner wall of the mounting seat (2), third groove (403) matched with the third boss (204) is provided on the outer wall of the pole (402), and the third boss (204) is installed in the third groove (403).

5. The lithium battery cover plate of claim 3, wherein, The pole assembly (4) further includes: Sealing element (5), the sealing element (5) is arranged on the outside of the pole (402), and the sealing element (5) is in abutment with the substrate (1) and the mounting seat (2).

6. The lithium battery cover plate of claim 1, wherein, The bottom of the substrate (1) is provided with a mounting groove (105), the top of the insulating plate (3) is provided with a mounting portion (302), the mounting portion (302) is installed in the mounting groove (105), and the third mounting hole (301) is arranged on the mounting portion (302).

7. The lithium battery cover plate of claim 6, wherein, Step portion (106) is provided in the mounting groove (105), flange (303) is provided at the edge of the third mounting hole (301), and the flange (303) is in abutment with the step portion (106).

8. The lithium battery cover plate of claim 1, wherein, The fourth mounting hole (107) is located between the two first mounting holes (101), the insulating plate (3) is provided with a plurality of through holes (304), the through holes (304) are communicated with the fourth mounting hole (107), and the anti-explosion assembly (6) is mounted on the fourth mounting hole (107).

9. The lithium battery cover plate of claim 1, wherein, The first liquid injection hole (108) is arranged on the substrate (1), and the second liquid injection hole (305) is arranged on the insulating plate (3).

10. A lithium battery, characterized by, Comprise: A body; The lithium battery cover plate in any one of claims 1 to 9 is mounted on one side of the body.

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