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 structure and secondary battery

technical field

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

Background technique

With the development of electric vehicles and the promotion of policies, the market demand for batteries is increasing. In recent years, various battery factories have continued to expand production to meet market demand and seize the market. Batteries account for most of the cost of electric vehicles, and with the increase in demand, companies are paying more and more attention to the cost of batteries, and are constantly working on cost reduction.

And how to reduce the production cost and production efficiency of the battery cover structure of the secondary battery core is undoubtedly also very important. At present, the existing battery cover structure connects various components together by stamping and riveting in the production process, but Since the upper plastic in the battery cover structure (including positive electrode resistors and negative electrode insulators) is made of resin injection molded parts, it is very easy to crack during the stamping and riveting process, resulting in waste of materials, which in turn leads to increased costs and battery cover structure. The problem that the work efficiency of production falls occurs.

In view of this, there is an urgent need to invent a battery to solve the problem that the upper plastic in the existing battery cover structure cracks during the stamping and riveting process, resulting in increased cost and reduced production efficiency.

Utility model content

In view of this, the utility model proposes a battery cover structure and a secondary battery to solve the problem that the upper plastic of the battery cover structure in the battery cracks during the stamping and riveting process.

In one aspect, the utility model provides a battery cover structure, including:

A light aluminum sheet, the middle of which is provided with an explosion-proof valve, and the upper side of the light aluminum sheet is provided with a first groove, and the first groove is arranged on opposite sides of the explosion-proof valve;

upper plastic, clamped in the first groove,

The terminal is clamped in the upper plastic, and the pole is connected to the terminal after passing through the light aluminum sheet and the upper plastic; 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 structure also includes:

The lower plastic is connected to the lower side of the light aluminum sheet; wherein,

The opposite sides of the upper side of the lower plastic are provided with receiving grooves, the lower side of the light aluminum sheet is provided with a first protrusion, and the first protrusion is arranged opposite to the receiving groove, so that the first protrusion A protrusion is fixed in the accommodating groove.

Further, the terminal includes a positive terminal and a negative terminal, and the upper plastic includes a positive plastic and a negative plastic; wherein

The middle part of the plastic upper side of the positive electrode is provided with a second groove, and the middle part of the lower side of the positive terminal is provided with a second protrusion;

The positive terminal is clamped in the second groove, and the lower side of the second protrusion is in contact with the inner bottom surface of the second groove, and the lower side of the positive terminal is in contact with the second concave. The second gap is formed between the inner bottom surfaces of the grooves, and the second gap is located at the side of the second protrusion.

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

The negative terminal is clamped in the third groove, and the lower side of the third protrusion is in contact with the inner bottom surface of the third groove, and the lower side of the negative terminal is in contact with the third concave The second gap is formed between the inner bottom surfaces of the grooves, and the second gap is located at the side of the third protrusion.

Further, a preset distance is maintained between the side wall of the positive terminal and the inner side wall of the second groove to form the first gap;

A predetermined distance is maintained between the sidewall of the negative terminal and the inner sidewall of the third groove to form the first gap.

Further, a fourth protrusion is provided in the middle of the inner bottom surface of the third groove, and a through hole is opened in the middle of the fourth protrusion to allow the pole to pass through;

The middle part of the lower side of the third protrusion is provided with a fourth groove, and the fourth groove is arranged opposite to the fourth protrusion, so that the fourth protrusion is clamped in the fourth recess. in the slot.

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

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

Further, the opposite sides of the lower side of the lower plastic are provided with locking grooves, the locking grooves are arranged opposite to the receiving grooves, and the lower part of the pole is locked in the locking grooves.

On the other hand, the utility model also provides a secondary battery, which includes the above-mentioned battery cover structure.

Compared with the prior art, the utility model has the beneficial effect that, by clamping the upper plastic in the first groove, a protrusion is provided on the lower side of the terminal to contact the inner groove of the upper plastic, so that the lower side of the terminal is in contact with the upper groove. The second gap is formed between the inner bottom surface of the plastic inner groove, which avoids direct contact between the lower side of the terminal and the inner bottom surface of the upper plastic groove, and further avoids excessive stamping force of the terminal on the upper plastic during the stamping and riveting process. Causes the problem of plastic cracking.

Further, in the utility model, by setting a preset distance between the side wall of the terminal and the inner wall of the upper plastic groove, the resistance between the end plate and the upper plastic is ensured to be more stable after the terminal and the upper plastic are stamped and riveted.

Description of 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 embodiment. The drawings are only for the purpose of illustrating preferred embodiments, and are not considered to limit the present invention. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

Figure 1 is a perspective view of a battery cover structure provided by an embodiment of the present invention;

Fig. 2 is a structural diagram of a battery cover structure provided by an embodiment of the present invention;

Fig. 3 is a cross-sectional view of a battery cover structure provided by an embodiment of the present invention;

Fig. 4 is the enlarged view of part A of the utility model embodiment;

Fig. 5 is an enlarged view of part B of the embodiment of the present invention.

In the figure, 100, light aluminum sheet; 101, first protrusion; 110, positioning piece; 120, explosion-proof valve; 130, first groove; 210, negative terminal; 211, third protrusion; 212, first card 220, the positive terminal; 221, the second protrusion; 310, the plastic on the negative pole; 311, the positioning hole; 312, the fourth protrusion; 313, the second clamping protrusion; 320, the plastic on the positive pole; 321 , the second groove; 400, the lower plastic; 410, the receiving groove; 500, the negative pole; 600, the positive pole; 710, the first gap; 720, the second gap.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application.

The terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , a battery cover structure in a preferred embodiment of the present invention includes: a light aluminum sheet 100 , upper plastic, terminals and lower plastic 400 .

Specifically, an explosion-proof valve 120 is arranged in the middle of the bare aluminum sheet 100 , and a first groove 130 is arranged on the upper side of the bare aluminum sheet 100 , and the first groove 130 is arranged on opposite sides of the explosion-proof valve 120 .

Specifically, the upper plastic is clamped in the first groove 130 .

Specifically, the terminal is clamped in the upper plastic, and the pole is connected to the terminal after passing through the light 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 the terminal A second gap 720 is formed between the bottom surface of the upper plastic and the inner bottom surface of the upper plastic.

Specifically, the lower plastic 400 is connected to the lower side of the light aluminum sheet 100, wherein the upper side of the lower plastic 400 is provided with a receiving groove 410 on both sides opposite to the upper side, and the lower side of the light aluminum sheet 100 is provided with a first protrusion 101, The first protrusion 101 is opposite to the receiving groove 410 , so that the first protrusion 101 is locked in the receiving groove 410 .

It can be seen that the structure of the battery cover plate in the utility model is composed of a light aluminum sheet 100, an upper plastic, a terminal and a lower plastic 400. By setting an explosion-proof valve 120 in the middle of the light aluminum sheet 100, an Plastic is placed in the first groove 130, and the terminal is clamped in the upper plastic. After the pole is passed through the light aluminum sheet 100 and the upper plastic, the terminal is used to fix the pole. The first protrusion 101 is provided with accommodating grooves 410 opposite to the first protrusion 101 on both sides of the upper side of the lower plastic 400 , and the first protrusion 101 is clamped in the accommodating groove 410 to further fix the pole.

Preferably, the light aluminum sheet 100 is made of light aluminum, a corrosion-resistant material.

It can be understood that the battery cover in the utility model is provided with grooves for placing the upper plastic on both sides of the light aluminum sheet 100, and the terminals are clamped in the upper plastic, and the side walls of the terminals are aligned with the inner sides of the upper plastic. A first gap 710 is formed between the walls, and a second gap 720 is formed between the bottom surface of the terminal and the inner bottom surface of the upper plastic, through which the pole passes through the light aluminum plate, the upper plastic is then welded and fixed by the terminal, and through the lower side of the light aluminum plate The first protrusion 101 is set and clamped in the receiving groove 410 of the lower plastic 400. When it is made by stamping and riveting to ensure the stability of the pole when the battery cover is made, it can further ensure the stability and avoidance of resistance in the upper plastic and the terminal. During the stamping and riveting process, the stamping force of the terminal against the upper plastic is too large, which causes the problem of cracking of the upper plastic.

Referring to Fig. 4 and Fig. 5, in the present embodiment, the terminal includes a positive terminal 220 and a negative terminal 210, and the upper plastic includes a positive plastic 320 and a negative plastic 310, wherein the middle part of the upper side of the positive plastic 320 is provided with a second In the groove 321 , a second protrusion 221 is disposed in the middle of the lower side of the positive terminal 220 .

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

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

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

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

It can be seen that the terminals in this embodiment include the positive terminal 220 and the negative terminal 210, the upper plastic includes the positive plastic 320 and the negative plastic 310, and the plastic 320 on the positive is provided with a groove on the lower side of the positive terminal 220. Protrusion, when the positive terminal 220 is installed with the plastic 320 on the positive pole, a second gap 720 is formed between the lower side of the positive terminal 220 and the inner bottom surface of the plastic 320 on the positive pole, so as to prevent the positive end plate from facing the plastic 320 on the positive pole during stamping and riveting. Excessive pressure causes the plastic 320 on the positive pole to crack. By opening a groove on the plastic 310 on the negative pole, a protrusion is provided on the underside of the negative pole terminal 210. A second gap 720 is formed between the inner bottom surfaces of the plastic 310 on the negative electrode to avoid cracking of the plastic 320 on the positive electrode due to excessive pressure of the negative end plate on the plastic 310 on the negative electrode during stamping 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 oppositely arranged, and the plastic 320 on the positive electrode and the plastic 310 on the negative electrode are respectively fixed on the light 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 on the positive electrode is made of conductive plastic material, so that the plastic 320 on the positive electrode has a resistance and can conduct electricity during use.

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

It can be understood that, when the plastic 320 on the positive electrode and the plastic 310 on the negative electrode are provided with opposite positioning holes 311, when the plastic 320 on the positive electrode and the plastic 310 on the negative electrode are installed on the light aluminum sheet 100, the plastic 320 on the positive electrode and the plastic 310 on the negative electrode The upper plastic 310 will not be offset. When improving the work efficiency of installing the positive upper plastic 320 and the negative upper plastic 310, it can also ensure that during the stamping and riveting process, the positive upper plastic 320 and the negative upper plastic 310 will not be on the bare aluminum. Offset on the sheet 100 leads to the problem of pole fracture and damage; and by using conductive plastic material for the plastic 320 on the positive electrode, it is ensured that the resistance in the plastic 320 on the positive electrode is more stable, and the conduction of the positive pole 600 is more stable during use.

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

Specifically, a predetermined distance 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 0.1 mm˜0.3 mm.

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

Preferably, the side walls of the positive terminal 220 and the negative terminal 210 are respectively provided with first clamping protrusions 212, and the inner walls of the grooves of the plastic 320 on the positive pole and the inner walls of the grooves of the plastic 310 on the negative pole are respectively provided with second clamping protrusions. Connect the protrusion 313.

It can be understood that in this embodiment, the terminal is provided with a snap-in protrusion, and the inner wall of the upper plastic groove is provided with a snap-in protrusion, so that the terminal and the upper plastic are installed to ensure that the terminal will not leave the upper plastic, and then When the positive terminal 220 and the plastic 320 on the positive pole are stamped and riveted, the battery cover will not be damaged due to the displacement of the positive terminal 220 and the manufacturing cost will be increased.

Specifically, a fourth protrusion 312 is provided in the middle of the inner bottom surface of the third groove, and a through hole is opened in the middle of the fourth protrusion 312 to allow the pole to pass through.

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

It can be seen that the middle part of the inner bottom surface of the plastic 310 on the negative pole is provided with a protrusion, and the middle part of the protrusion is provided with a through hole to ensure that the pole passes through. The contact further ensures that the plastic 310 on the negative electrode and the negative terminal 210 will not crack during stamping and riveting.

Specifically, two opposite sides of the lower plastic 400 are provided with locking grooves, the locking grooves are opposite to the receiving groove 410 , and the lower part of the pole is locked in the locking grooves.

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

In summary, it can be seen that a battery cover plate in a preferred embodiment of the utility model embodiment is made by passing the upper part of the positive pole 600 and the upper part of the negative pole 500 through a corrosion-resistant material such as a light aluminum plate. Light aluminum sheet 100, fix the top of the positive pole 600 through the plastic 320 on the positive pole and the positive pole terminal 220, fix the top of the negative pole 500 through the plastic 310 on the negative pole and the negative pole terminal 210, and clamp the positive pole through the lower side of the lower plastic 400 plate 600 and the negative pole 500 are connected with the bare aluminum sheet 100, and then made by stamping and riveting.

Specifically, compared with the prior art in this embodiment, the utility model has the beneficial effect that by snapping the upper plastic into the first groove 130, a protrusion is provided on the lower side of the terminal to contact with the inner groove of the upper plastic. , so that a second gap 720 is formed between the lower side of the terminal and the inner bottom of the upper plastic inner groove, which avoids direct contact between the lower side of the terminal and the inner bottom of the upper plastic groove, and further avoids the pairing of the terminal during the stamping and riveting process. The stamping force of the upper plastic is too large to cause the problem of cracking of the upper plastic.

Specifically, in the present invention, a preset distance is set between the side wall of the terminal and the inner wall of the upper plastic groove, so that the resistance between the end plate and the upper plastic is more stable after the terminal and the upper plastic are stamped and riveted.

In the embodiments of the present application, a secondary battery is also provided, and the secondary battery includes the battery cover in the above-mentioned embodiments. Specifically, the battery cover plate in the preferred embodiments of the above-mentioned embodiments is installed on the upper part of the secondary battery to be assembled as a secondary battery for use. By adopting the above-mentioned battery cover plate for the secondary battery, not only can the plastic on the battery cover plate be deformed during the assembly process, causing its resistance to be unstable, resulting in waste of materials and danger to assemblers, but also reducing production to a certain extent. Cost, while improving the efficiency of production and the safety of construction personnel.

Specifically, the above-mentioned secondary battery can be used to supply power to vehicles, trains, aircraft, ships, and the like.

Those of ordinary skill in the art can understand that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art However, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A battery cover structure, characterized in that, comprising: A light aluminum sheet (100), the middle of which is provided with an explosion-proof valve (120), the upper side of the light aluminum sheet (100) is provided with a first groove (130), and the first groove (130) is arranged on the The opposite sides of the explosion-proof valve (120); upper plastic, stuck in the first groove (130), The terminal is clamped in the upper plastic, and the pole is connected to the terminal after passing through the light 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. 2. The battery cover structure according to claim 1, further comprising: The lower plastic (400) is connected to the lower side of the light aluminum sheet (100); wherein, The opposite sides of the upper side of the lower plastic (400) are provided with accommodating grooves (410), and the lower side of the light aluminum sheet (100) is provided with a first protrusion (101), and the first protrusion ( 101) is arranged opposite to the accommodating groove (410), so that the first protrusion (101) is locked in the accommodating groove (410). 3. The battery cover structure according to claim 1, characterized in that, The terminal includes a positive terminal (220) and a negative terminal (210), and the upper plastic includes a positive plastic (320) and a negative plastic (310); wherein A second groove (321) is provided in the middle of the upper side of the positive plastic (320), and a second protrusion (221) is provided in the middle of the lower side of the positive terminal (220); The positive terminal (220) is clamped in the second groove (321), and the lower side of the second protrusion (221) is in contact with the inner bottom surface of the second groove (321), so The second gap (720) is formed between the lower side of the positive terminal (220) and the inner bottom surface of the second groove (321), and the second gap (720) is located at the second protrusion side of (221). 4. The battery cover structure according to claim 3, characterized in that, The middle part of the upper side of the plastic (310) on the negative electrode is provided with a third groove, and the middle part of the lower side of the negative terminal (210) is provided with a third protrusion (211); The negative terminal (210) is clamped in the third groove, and the lower side of the third protrusion (211) is in contact with the inner bottom surface of the third groove, and the negative terminal (210) The second gap (720) is formed between the lower side of the bottom surface of the third groove and the inner bottom surface of the third groove, and the second gap (720) is located at the side of the third protrusion (211). 5. The battery cover structure according to claim 4, characterized in that, A preset distance is maintained between the side wall of the positive terminal (220) and the inner side wall of the second groove (321) to form the first gap (710); A predetermined distance is maintained between the side wall of the negative terminal (210) and the inner side wall of the third groove to form the first gap (710). 6. The battery cover structure according to claim 5, characterized in that, The middle part of the inner bottom surface of the third groove is provided with a fourth protrusion (312), and a through hole is opened in the middle part of the fourth protrusion (312), so that the pole can pass through; The middle part of the lower side of the third protrusion (211) is provided with a fourth groove, and the fourth groove is arranged opposite to the fourth protrusion (312), so that the fourth protrusion (312) ) is set in the fourth groove. 7. The battery cover structure according to claim 5, characterized in that, The width of the first gap (710) is 0.1mm˜0.3mm. 8. The battery cover structure according to claim 5, characterized in that, The height of the second gap (720) is 0.1mm˜0.5mm. 9. The battery cover structure according to claim 2, characterized in that, The opposite sides of the lower side of the lower plastic (400) are provided with clamping grooves, the clamping grooves are arranged opposite to the receiving groove (410), and the lower part of the pole is clamped in the clamping grooves Inside. 10. A secondary battery, characterized by comprising the battery cover structure according to any one of claims 1-9.

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