CN219163535U - Battery cover plate structure and secondary battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery cover plate structure and a secondary battery, wherein the battery cover plate structure comprises the following components: an explosion-proof valve is arranged in the middle of the aluminum sheet, a first groove is arranged on the upper side surface of the aluminum sheet, and the first groove is arranged on two opposite sides of the explosion-proof valve; the upper plastic is clamped in the first groove; the terminal card is established in last plastic, and the utmost point post passes light aluminum sheet and goes up the plastic and be connected with the terminal after, wherein, is formed with first clearance between the lateral wall of terminal and the inside wall of last plastic, is formed with the second clearance between the bottom surface of terminal and the interior bottom surface of last plastic. Through setting up the arch in first recess with last plastic joint at the terminal downside and going up the plastic inner groove and contact, make between its terminal downside and the interior bottom surface of going up the plastic inner groove be formed with the second clearance, avoided terminal downside and the interior bottom surface direct contact of last plastic recess, further avoided the terminal to the too big problem that leads to the fact last plastic fracture of stamping force of last plastic at punching press riveting in-process.

Description

Battery cover plate structure and secondary battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cover plate structure and a secondary battery.

Background

With the development of electric vehicles, the demand of batteries in the market is increasing with the promotion of policies. In recent years, various battery factories are continuously expanded to meet market demands and occupy the market. The battery occupies most of the cost of the electric automobile, and along with the increase of the demand, the enterprise pays more and more attention to the cost of the battery, and the work of reducing the cost is continuously carried out.

But how to reduce the production cost and production efficiency of the battery cover plate structure of the secondary battery core is very important, at present, the existing battery cover plate structure connects all parts together in a stamping and riveting mode in the production process, but because the upper plastic (including the anode resistor and the cathode insulator) in the battery cover plate structure is made of resin injection molding pieces, cracking is very easy to occur in the stamping and riveting process, material waste is caused, and further the problems of cost increase and reduction of the working efficiency of the battery cover plate structure production occur.

In view of the above, it is highly desirable to provide a battery for solving the problems of increased cost and reduced production efficiency caused by cracking of the upper plastic in the process of punching and riveting in the existing battery cover plate structure.

Disclosure of Invention

In view of this, the present utility model provides a battery cover structure and a secondary battery, which aims to solve the problem that the upper plastic of the battery cover structure in the battery is cracked in the process of punching and riveting.

In one aspect, the present utility model provides a battery cover plate structure comprising:

the anti-explosion valve is arranged in the middle of the light aluminum sheet, a first groove is formed in the upper side surface of the light aluminum sheet, and the first groove is formed in two opposite sides of the anti-explosion valve;

the upper plastic is clamped in the first groove,

the terminal is clamped in the upper plastic, and the pole post penetrates through the aluminum sheet and the upper plastic and then is connected with the terminal; wherein,,

a first gap is formed between the side wall of the terminal and the inner side wall of the upper plastic, and a second gap is formed between the bottom surface of the terminal and the inner bottom surface of the upper plastic.

Further, the battery cover plate structure further includes:

the lower plastic is connected with the lower side surface of the aluminum sheet; wherein,,

the accommodating groove is formed in two opposite sides of the upper side face of the lower plastic, a first protrusion is arranged on the lower side face of the aluminum sheet, and the first protrusion is arranged opposite to the accommodating groove, so that the first protrusion is clamped in the accommodating groove.

Further, the terminals comprise a positive terminal and a negative terminal, and the upper plastic comprises a positive plastic and a negative plastic; wherein the method comprises the steps of

A second groove is formed in the middle of the upper side surface of the positive electrode, and a second bulge is arranged in the middle of the lower side surface of the positive electrode terminal;

the positive terminal is clamped in the second groove, the lower side face of the second protrusion is in contact with the inner bottom face of the second groove, a second gap is formed between the lower side face of the positive terminal and the inner bottom face of the second groove, and the second gap is located at the side portion of the second protrusion.

Further, a third groove is formed in the middle of the upper side surface of the negative electrode upper plastic body, and a third protrusion is arranged in the middle of the lower side surface of the negative electrode terminal;

the negative terminal is clamped in the third groove, the lower side face of the third protrusion is in contact with the inner bottom face of the third groove, a second gap is formed between the lower side face of the negative terminal and the inner bottom face of the third groove, and the second gap is located at the side portion of the third protrusion.

Further, a preset interval is kept between the side wall of the positive electrode terminal and the inner side wall of the second groove, so that the first gap is formed;

a preset interval is kept between the side wall of the negative electrode terminal and the inner side wall of the third groove so as to form the first gap.

Further, a fourth bulge is arranged in the middle of the inner bottom surface of the third groove, and a through hole is formed in the middle of the fourth bulge so that the pole passes through;

a fourth groove is formed in the middle of the lower side face of the third protrusion, and the fourth groove and the fourth protrusion are arranged opposite to each other, so that the fourth protrusion is clamped in the fourth groove.

Further, the width of the first gap is 0.1mm to 0.3mm.

Further, the height of the second gap is 0.1 mm-0.5 mm.

Further, clamping grooves are formed in two opposite sides of the lower side face of the lower plastic, the clamping grooves are opposite to the containing grooves, and the lower portions of the pole posts are clamped in the clamping grooves.

On the other hand, the utility model also provides a secondary battery, which comprises the battery cover plate structure.

Compared with the prior art, the utility model has the beneficial effects that the upper plastic is clamped in the first groove, the bulge is arranged on the lower side surface of the terminal and is contacted with the upper plastic inner groove, so that the second gap is formed between the lower side surface of the terminal and the inner bottom surface of the upper plastic inner groove, the direct contact between the lower side surface of the terminal and the inner bottom surface of the upper plastic groove is avoided, and the problem of upper plastic cracking caused by overlarge stamping force of the terminal on the upper plastic in the stamping and riveting process is further avoided.

Furthermore, the preset distance is arranged between the side wall of the terminal and the inner side wall of the upper plastic groove, so that the terminal and the upper plastic are punched and riveted, and the resistance between the end plate and the upper plastic is ensured to be more stable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 is a perspective view of a battery cover plate structure according to an embodiment of the present utility model;

fig. 2 is a construction diagram of a battery cover structure according to an embodiment of the present utility model;

fig. 3 is a cross-sectional view of a battery cover structure according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of portion A according to an embodiment of the present utility model;

fig. 5 is an enlarged view of part B of an embodiment of the present utility model.

In the figure, 100, a light aluminum sheet; 101. a first protrusion; 110. a positioning piece; 120. an explosion-proof valve; 130. a first groove; 210. a negative electrode terminal; 211. a third protrusion; 212. a first clamping protrusion; 220. a positive electrode terminal; 221. a second protrusion; 310. plastic is arranged on the negative electrode; 311. positioning holes; 312. a fourth protrusion; 313. a second clamping protrusion; 320. plastic cement is arranged on the anode; 321. a second groove; 400. lower plastic; 410. a receiving groove; 500. a negative electrode column; 600. a positive electrode post; 710. a first gap; 720. and a second gap.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

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

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, 2 and 3, a battery cover structure according to a preferred embodiment of the present utility model includes: aluminum sheet 100, upper plastic, terminals and lower plastic 400.

Specifically, the photo-aluminum sheet 100 is provided with an explosion-proof valve 120 in the middle thereof, the upper side of the photo-aluminum sheet 100 is provided with a first groove 130, and the first groove 130 is provided at opposite sides of the explosion-proof valve 120.

Specifically, the upper plastic card is disposed in the first groove 130.

Specifically, the terminal is clamped in the upper plastic, and the post is connected with the terminal after passing through the aluminum sheet 100 and the upper plastic, wherein a first gap 710 is formed between the side wall of the terminal and the inner side wall of the upper plastic, and a second gap 720 is formed between the bottom surface of the terminal and the inner bottom surface of the upper plastic.

Specifically, the lower plastic 400 is connected with the lower side of the aluminum flake 100, wherein the two opposite sides of the upper side of the lower plastic 400 are provided with receiving grooves 410, the lower side of the aluminum flake 100 is provided with first protrusions 101, and the first protrusions 101 are opposite to the receiving grooves 410, so that the first protrusions 101 are clamped in the receiving grooves 410.

It can be seen that the battery cover plate structure of the present utility model is composed of the aluminum sheet 100, the upper plastic, the terminal and the lower plastic 400, wherein the explosion-proof valve 120 is disposed in the middle of the aluminum sheet 100, the first grooves 130 are disposed at both sides of the explosion-proof valve 120 to place the upper plastic, the terminal is clamped in the upper plastic, the terminal is fixed by the terminal after the terminal is inserted into the aluminum sheet 100 and the upper plastic, the first protrusions 101 are disposed at the lower side of the aluminum sheet 100, the accommodating grooves 410 are disposed at both sides of the upper side of the lower plastic 400 opposite to the first protrusions 101, the first protrusions 101 are clamped in the accommodating grooves 410, and the terminal is further fixed.

Preferably, the aluminum flake 100 is made of aluminum flake, a corrosion resistant material.

It can be understood that the battery cover plate in the present utility model is formed by arranging grooves for placing the upper plastic on two sides of the aluminum sheet 100, clamping the terminals in the upper plastic, forming a first gap 710 between the side wall of the terminals and the inner side wall of the upper plastic, forming a second gap 720 between the bottom surface of the terminals and the inner bottom surface of the upper plastic, passing through the aluminum sheet through the terminal, welding and fixing the upper plastic by the terminals, arranging the first protrusions 101 on the lower side surface of the aluminum sheet and clamping the lower plastic 400 in the accommodating groove 410, when the battery cover plate is made by stamping and riveting, the stability of the upper plastic and the resistance in the terminals is further ensured, and the problem of cracking of the upper plastic caused by overlarge stamping force of the terminals on the upper plastic in the stamping and riveting process is avoided.

Referring to fig. 4 and 5, in this embodiment, the terminal includes a positive terminal 220 and a negative terminal 210, the upper plastic includes a positive plastic 320 and a negative plastic 310, wherein a second groove 321 is formed in the middle of the upper side surface of the positive plastic 320, and a second protrusion 221 is formed in the middle of the lower side surface of the positive terminal 220.

Specifically, the positive electrode terminal 220 is clamped in the second groove 321, the lower side surface of the second protrusion 221 contacts the inner bottom surface of the second groove 321, a second gap 720 is formed between the lower side surface of the positive electrode terminal 220 and the inner bottom surface of the second groove 321, and the second gap 720 is located at the side part of the second protrusion 221.

Specifically, a third groove is formed in the middle of the upper side surface of the plastic 310 on the negative electrode, and a third protrusion 211 is formed in the middle of the lower side surface of the negative electrode terminal 210.

Specifically, the negative terminal 210 is clamped in the third groove, the lower side surface of the third protrusion 211 contacts with the inner bottom surface of the third groove, a second gap 720 is formed between the lower side surface of the negative terminal 210 and the inner bottom surface of the third groove, and the second gap 720 is located at the side part of the third protrusion 211.

Specifically, the height of the second gap 720 is 0.1mm to 0.5mm.

It can be seen that, in this embodiment, the terminal includes the positive terminal 220 and the negative terminal 210, the upper plastic includes the positive plastic 320 and the negative plastic 310, the recess is formed on the positive plastic 320, the protrusion is disposed at the lower side of the positive terminal 220, when the positive terminal 220 is mounted on the positive plastic 320, the second gap 720 is formed between the lower side of the positive terminal 220 and the inner bottom surface of the positive plastic 320, so as to avoid the positive plastic 320 cracking caused by the excessive pressure of the positive end plate on the positive plastic 320 during punching and riveting, the protrusion is disposed at the lower side of the negative terminal 210 by forming the recess on the negative plastic 310, and the second gap 720 is formed between the lower side of the negative terminal 210 and the inner bottom surface of the negative plastic 310 when the negative terminal 210 is mounted on the negative plastic 310, so as to avoid the positive plastic 320 cracking caused by the excessive pressure of the negative end plate on the negative plastic 310 during punching and riveting.

Preferably, the plastic 320 on the positive electrode and the plastic 310 on the negative electrode are respectively provided with positioning holes 311 which are oppositely arranged, the plastic 320 on the positive electrode and the plastic 310 on the negative electrode are respectively fixed on the aluminum sheet 100 through the positioning piece 110, and the positioning piece 110 is made of insulating materials such as ceramic materials.

Preferably, the plastic 320 is made of conductive plastic, so that the plastic 320 has a resistor for conducting electricity during use.

Preferably, the negative terminal 210 is made of insulating plastic material, so that the later use process can play an insulating role.

It can be understood that, by respectively forming the positioning holes 311 on the plastic 320 on the positive electrode and the plastic 310 on the negative electrode, when the plastic 320 on the positive electrode and the plastic 310 on the negative electrode are installed on the aluminum sheet 100, the plastic 320 on the positive electrode and the plastic 310 on the negative electrode can not deviate, and when the working efficiency of installing the plastic 320 on the positive electrode and the plastic 310 on the negative electrode is improved, the problem that the post is broken and damaged due to the deviation of the plastic 320 on the positive electrode and the plastic 310 on the negative electrode on the aluminum sheet 100 can be avoided during the punching and riveting process; by adopting the conductive plastic material for the plastic 320 on the positive electrode, the resistance existing in the plastic 320 on the positive electrode is ensured to be more stable, and the conductivity of the positive electrode post 600 in the use process is ensured to be more stable.

Specifically, a predetermined interval is maintained between the sidewall of the positive electrode terminal 220 and the inner sidewall of the second groove 321 to form the first gap 710.

Specifically, a preset interval is maintained between the sidewall of the negative terminal 210 and the inner sidewall of the third groove to form the first gap 710.

Specifically, the width of the first gap 710 is 0.1mm to 0.3mm.

It can be seen that, in this embodiment, by keeping a gap with a width of 0.1mm to 0.3mm between the side wall of the positive electrode terminal 220 and the inner side wall of the plastic 320 groove on the positive electrode and by keeping a gap with a width of 0.1mm to 0.3mm between the side wall of the negative electrode terminal 210 and the inner side wall of the plastic 310 groove on the negative electrode, the internal resistance of the plastic 320 groove on the positive electrode and the positive electrode is more stable, and the insulation between the negative electrode terminal 210 and the plastic 310 on the negative electrode is better.

Preferably, the side walls of the positive terminal 220 and the negative terminal 210 are respectively provided with a first clamping protrusion 212, and the inner side wall of the plastic 320 groove on the positive electrode and the inner side wall of the plastic 310 groove on the negative electrode are respectively provided with a second clamping protrusion 313.

It can be appreciated that, in this embodiment, by providing the clamping protrusion on the terminal, the clamping protrusion is provided on the inner side wall of the upper plastic groove, so that the terminal and the upper plastic are not separated from the upper plastic after being mounted, and further, when the positive terminal 220 and the positive upper plastic 320 are riveted by punching, the damage of the battery cover plate caused by the displacement of the positive terminal 220 is avoided, and the manufacturing cost is increased.

Specifically, a fourth protrusion 312 is disposed at the middle of the inner bottom surface of the third groove, and a through hole is formed at the middle of the fourth protrusion 312 to allow the pole to pass through.

Specifically, a fourth groove is formed in the middle of the lower side surface of the third protrusion 211, and the fourth groove is opposite to the fourth protrusion 312, so that the fourth protrusion 312 is clamped in the fourth groove.

It can be seen that the middle part of the inner bottom surface of the plastic 310 on the negative electrode is provided with a bulge, and the middle part of the bulge is provided with a through hole to ensure that the pole passes through, and the plastic 310 on the negative electrode is further ensured not to crack when the plastic 310 on the negative electrode is riveted with the negative electrode terminal 210 by making the bulge on the lower side surface of the negative electrode terminal 210 contact with the bulge of the groove of the plastic 310 on the negative electrode.

Specifically, the two opposite sides of the lower side surface of the lower plastic 400 are provided with clamping grooves, the clamping grooves are opposite to the accommodating grooves 410, and the lower parts of the polar posts are clamped in the clamping grooves.

It can be seen that the lower sides of the left and right sides of the lower plastic 400 are respectively provided with a clamping groove for placing the lower part of the pole, and further fixing the pole.

In summary, it can be seen that in the battery cover plate according to the preferred embodiment of the present utility model, the upper portion of the positive electrode post 600 and the upper portion of the negative electrode post 500 are made of aluminum sheets 100 made of corrosion-resistant materials such as aluminum sheets, the top of the positive electrode post 600 is fixed by the positive electrode upper plastic 320 and the positive electrode terminal 220, the top of the negative electrode post 500 is fixed by the negative electrode upper plastic 310 and the negative electrode terminal 210, the positive electrode post 600 and the negative electrode post 500 are clamped by the lower side surface of the lower plastic 400 plate and are connected with the aluminum sheets 100, and then the battery cover plate is made by punching and riveting.

Specifically, compared with the prior art, the embodiment of the utility model has the beneficial effects that the upper plastic is clamped in the first groove 130, the protrusion is arranged on the lower side surface of the terminal and contacts with the upper plastic inner groove, so that the second gap 720 is formed between the lower side surface of the terminal and the inner bottom surface of the upper plastic inner groove, the direct contact between the lower side surface of the terminal and the inner bottom surface of the upper plastic groove is avoided, and the problem of upper plastic cracking caused by overlarge stamping force of the terminal on the upper plastic in the stamping and riveting process is further avoided.

Specifically, the preset distance is arranged between the side wall of the terminal and the inner side wall of the upper plastic groove, so that the terminal and the upper plastic are punched and riveted, and the resistance between the end plate and the upper plastic is ensured to be more stable.

In the embodiments of the present application, there is also provided a secondary battery including the battery cover plate in each of the above embodiments. Specifically, the battery cover plate in the preferred embodiment of each of the above embodiments is mounted on the upper portion of the secondary battery to be assembled for use as the secondary battery. By adopting the battery cover plate, the secondary battery can not only avoid the problems that the upper plastic of the battery cover plate is unstable in resistance due to deformation in the assembly process, and causes material waste and danger to assembly staff, but also reduce the production cost to a certain extent, and improve the production working efficiency and the safety of construction staff.

Specifically, the secondary battery described above may be used to supply power to a vehicle, a train, an aircraft, a ship, or the like.

Those of ordinary skill in the art will appreciate that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A battery cover plate structure, characterized by comprising:

the anti-explosion device comprises a light aluminum sheet (100), wherein an anti-explosion valve (120) is arranged in the middle of the light aluminum sheet, a first groove (130) is formed in the upper side surface of the light aluminum sheet (100), and the first groove (130) is formed in two opposite sides of the anti-explosion valve (120);

the upper plastic is clamped in the first groove (130),

the terminal is clamped in the upper plastic, and the pole post penetrates through the aluminum sheet (100) and the upper plastic and is connected with the terminal; wherein,,

a first gap (710) is formed between the side wall of the terminal and the inner side wall of the upper plastic, and a second gap (720) is formed between the bottom surface of the terminal and the inner bottom surface of the upper plastic.

2. The battery cover structure of claim 1, further comprising:

the lower plastic (400) is connected with the lower side surface of the aluminum sheet (100); wherein,,

the utility model discloses a light aluminum sheet, including plastic (400) under, holding groove (410) have been seted up to the both sides that the upside is relative of lower plastic (400), the downside of light aluminum sheet (100) is provided with first arch (101), first arch (101) with holding groove (410) set up relatively, so that first arch (101) card is established in holding groove (410).

3. The battery cover structure of claim 1, wherein,

the terminals include a positive terminal (220) and a negative terminal (210), the upper plastic including a positive upper plastic (320) and a negative upper plastic (310); wherein the method comprises the steps of

A second groove (321) is formed in the middle of the upper side surface of the plastic (320) on the positive electrode, and a second protrusion (221) is arranged in the middle of the lower side surface of the positive electrode terminal (220);

the positive terminal (220) is clamped in the second groove (321), the lower side face of the second protrusion (221) is in contact with the inner bottom face of the second groove (321), a second gap (720) is formed between the lower side face of the positive terminal (220) and the inner bottom face of the second groove (321), and the second gap (720) is located at the side portion of the second protrusion (221).

4. The battery cover structure of claim 3, wherein,

a third groove is formed in the middle of the upper side surface of the negative electrode upper plastic (310), and a third protrusion (211) is arranged in the middle of the lower side surface of the negative electrode terminal (210);

the negative terminal (210) is clamped in the third groove, the lower side surface of the third protrusion (211) is in contact with the inner bottom surface of the third groove, a second gap (720) is formed between the lower side surface of the negative terminal (210) and the inner bottom surface of the third groove, and the second gap (720) is located at the side part of the third protrusion (211).

5. The battery cover structure of claim 4, wherein,

a preset interval is kept between the side wall of the positive electrode terminal (220) and the inner side wall of the second groove (321) so as to form the first gap (710);

a predetermined spacing is maintained between the side wall of the negative terminal (210) and the inner side wall of the third recess to form the first gap (710).

6. The battery cover structure of claim 5, wherein,

a fourth bulge (312) is arranged in the middle of the inner bottom surface of the third groove, and a through hole is formed in the middle of the fourth bulge (312) so that the pole passes through;

a fourth groove is formed in the middle of the lower side face of the third protrusion (211), and the fourth groove is opposite to the fourth protrusion (312), so that the fourth protrusion (312) is clamped in the fourth groove.

7. The battery cover structure of claim 5, wherein,

the width of the first gap (710) is 0.1mm to 0.3mm.

8. The battery cover structure of claim 5, wherein,

the height of the second gap (720) is 0.1 mm-0.5 mm.

9. The battery cover structure of claim 2, wherein,

clamping grooves are formed in two opposite sides of the lower side face of the lower plastic (400), the clamping grooves are opposite to the containing grooves (410), and the lower portions of the pole posts are clamped in the clamping grooves.

10. A secondary battery comprising the battery cover plate structure according to any one of claims 1 to 9.

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