CN217062306U

CN217062306U - Electrode cover plate assembly of high-current lithium battery

Info

Publication number: CN217062306U
Application number: CN202220687299.2U
Authority: CN
Inventors: 施苏云
Original assignee: Suzhou Juhong Communication Computer Technology Co ltd
Current assignee: Bluepark System Branch Of Baic New Energy Motor Co ltd; Beijing Electric Vehicle Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-26
Anticipated expiration: 2032-03-28

Abstract

The utility model provides a heavy current lithium cell electrode cover plate assembly, is including the apron main part that is equipped with the electrode through-hole, and electrode pressing plate insulating connection is on the apron main part, and lower insulating pad is connected below the apron main part, and the utmost point post that lies in lower insulating pad below passes electrode through-hole connection electrode pressing plate, the electrode through-hole have more than two, the utmost point post quantity of same polarity also more than two and the one-to-one passes each electrode through-hole and connects same electrode pressing plate, forms multipolar post heavy current structure. The utility model discloses a rational in infrastructure, a apron assembly uses a plurality of homopolarity's utmost point post, makes the effective area that the electric current passes through increase by a wide margin, and electric current bearing capacity is strong, and the size of each utmost point post need not too big, and battery cover plate size also need not corresponding expansion, and lithium battery shell uses two apron assemblies of positive pole, negative pole simultaneously, and the volume size can keep compactlyer, and application scope is wider more nimble.

Description

Electrode cover plate assembly of high-current lithium battery

The technical field is as follows: the utility model relates to a lithium cell accessory, especially the apron assembly of lithium cell.

Background art: the pole of many power lithium batteries needs to pass a relatively large current, and generally, a pole with a relatively large diameter can be used to improve the current passing capacity. However, the size of the terminal increases, so that the size of the battery cover plate and the size of the battery shell need to be increased correspondingly, the structural size is not compact enough, and the limitation of the application range is increased due to the overlarge battery specification. Moreover, the sealing structure of the electrode assembly on the cover plate of the conventional power lithium battery is realized by a welding process and a high-strength plastic part, so that the assembly process requirement is high, the production is complicated, the sealing structure is possibly deformed and broken when the working condition temperature changes violently, the leakage risk exists, and the safety and reliability are not ideal enough.

The invention content is as follows: the utility model provides a compact structure is reasonable, and the current capacity is big heavy current lithium cell electrode apron assembly.

The utility model discloses a be equipped with the apron main part of electrode through-hole, electrode clamp plate insulating connection is on the apron main part, and lower insulating pad is connected below the apron main part, and the utmost point post that lies in lower insulating pad below passes electrode through-hole connection electrode clamp plate, the electrode through-hole have more than two, the utmost point post quantity of same polarity also is more than two and the one-to-one passes each electrode through-hole and connects same electrode clamp plate, forms multipolar post heavy current structure.

The utility model has the advantages of reasonable structure, a apron assembly uses a plurality of same polarity's utmost point post, makes the effective area that the electric current passes through increase by a wide margin, and electric current bearing capacity is strong, and the size of each utmost point post need not too big, and battery cover plate size also need not corresponding expansion, and lithium cell shell uses two apron assemblies of positive pole, negative pole simultaneously, and volume size can keep compactlyer, and application scope is wider more nimble.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Description of the drawings: fig. 1 is a schematic view of a main structure of a cover plate assembly of a positive electrode.

Fig. 2 is a perspective view of fig. 1.

Fig. 3 is an exploded perspective view of fig. 2.

Fig. 4 is an enlarged schematic view of a portion a of fig. 1.

Fig. 5 is a perspective view of a cover plate assembly of the negative electrode.

Fig. 6 is an exploded perspective view of fig. 5.

The specific implementation mode is as follows: as shown in fig. 1 to 3, the cover plate assembly of the positive electrode is provided with an electrode through hole 2, an electrode pressing plate 3 is connected to the upper surface of the cover plate body 1 through an upper insulating pad 13, a lower insulating pad 4 is connected to the lower surface of the cover plate body 1, and a pole 5 located below the lower insulating pad 4 passes through the electrode through hole 2 and is connected to the electrode pressing plate 3. The number of the electrode through holes 2 is more than two, three are shown in the figure, and the number of the polar columns 5 with the same polarity is also three, and the polar columns penetrate through the electrode through holes 2 one by one to be connected with the same electrode pressing plate 3, so that a multi-polar-column large-current structure is formed. The cover plate main body 1 of the power lithium battery is generally connected with two buckled side cushion bodies 14 below, so that the protection effect can be achieved.

Generally, each of the poles 5 has a structure of a thin upper part and a thick lower part, and the upper part of the pole 5 is riveted to the electrode holder 3. When the working condition temperature changes violently by utilizing the metal riveting mode, the sealing structure is good in stability, free of deformation and breakage and high in safety and reliability. As shown in fig. 4, a sealing ring 7 can be sleeved on each pole 5, a step 8 is arranged on the outer ring edge of the sealing ring 7, a flange 10 is correspondingly arranged at a through hole 9 in the lower insulating pad 4 for penetrating through the pole 5, and the flange 10 and the step 8 are overlapped up and down and pressed to contact with each other, so that a sealed staggered reinforcing structure is formed, and the leakage risk is further reduced.

The upper surface of the cover plate main body 1 can be connected with a drum nail 6 to form a battery state signal monitoring point. The battery monitoring system is connected with the drum nail 6, so that the service condition of the battery can be monitored in real time, the abnormality can be fed back in time, safety accidents caused by abnormal reasons can be effectively reduced, and the safety is improved. The cover plate assembly of the positive electrode is generally provided with a liquid injection hole 11 on the cover plate main body 1, and the drum nail 6 can cover the liquid injection hole 11 for plugging.

As shown in fig. 5 and 6, the structure of the cover plate assembly of the negative electrode is almost the same as that of the cover plate assembly of the positive electrode, and in the figure, three poles 5 of the same polarity are used and are riveted with the electrode holder 3, and the drum nail 6 is similarly connected to the upper surface of the cover plate body 1 as a battery state signal monitoring point. However, the negative electrode lid assembly is generally not provided with a liquid injection hole, and the explosion-proof valve 12 is provided in the lid body 1, so that gas can be released when the internal pressure of the battery is too high, thereby improving safety.

Claims

1. The utility model provides a heavy current lithium cell electrode cover plate assembly, is including the apron main part that is equipped with the electrode through-hole, and the insulating connection of electrode clamp plate is on the apron main part, and lower insulating pad is connected below the apron main part, and the utmost point post that is located lower insulating pad below passes electrode through-hole connection electrode clamp plate, characterized in that: the electrode through holes (2) are more than two, the number of the polar columns (5) with the same polarity is more than two, and the polar columns penetrate through the electrode through holes (2) one by one to be connected with the same electrode pressing plate (3), so that a multi-polar-column high-current structure is formed.

2. A high current lithium battery electrode cover plate assembly as claimed in claim 1, wherein: each pole post (5) is of a structure with a thin upper part and a thick lower part, and the upper part of each pole post (5) is riveted with the electrode pressing plate (3).

3. A high current lithium battery electrode cover plate assembly as claimed in claim 1 or 2, wherein: the upper surface of the cover plate main body (1) is connected with a drum nail (6) to form a battery state signal monitoring point.

4. A high current lithium battery electrode cover plate assembly as claimed in claim 1 or 2, wherein: and a sealing ring (7) is sleeved on each pole column (5), a step (8) is arranged at the edge of the outer ring of the sealing ring (7), a flange (10) is correspondingly arranged at the position of a through hole (9) which is used for penetrating through the pole column (5) in the lower insulating pad (4), and the flange (10) and the step (8) are overlapped up and down and pressed to contact to form a sealed staggered reinforcing structure.

5. A high current lithium battery electrode cover assembly as claimed in claim 3, wherein: each pole column (5) is further sleeved with a sealing ring (7), the edge of the outer ring of the sealing ring (7) is provided with a step (8), a through hole (9) which is used for penetrating the pole column (5) in the lower insulating pad (4) is correspondingly provided with a flange (10), and the flange (10) and the step (8) are overlapped and pressed to contact up and down to form a sealed staggered reinforcing structure.

6. A high current lithium battery electrode cover plate assembly as claimed in claim 3, wherein: the cover plate main body (1) is also provided with a liquid injection hole (11), and the drum nail (6) covers the liquid injection hole (11).

7. A high current lithium battery electrode cover plate assembly as claimed in claim 3, wherein: an explosion-proof valve (12) is also arranged on the cover plate main body (1).