CN202142600U - Lithium-ion battery cover and battery pole unit connecting structure - Google Patents

Abstract

The utility model provides a lithium-ion battery cover and battery pole unit connecting structure, which consists of a battery cover and a battery pole unit. The lithium-ion battery cover and battery pole unit connecting structure is characterized in that: the battery cover consists of connecting lead pieces and battery cover plates, wherein the connecting lead piece consists of overlapped battery lead pieces; the battery pole unit consists of battery pole posts and current collectors; the quantity of the current collectors is same with the quantity of the connecting lead pieces; the connecting lead pieces are riveted together with the battery cover plates through the battery pole posts and are welded and fixed with the current collectors; and with the lithium-ion battery cover and battery pole unit connecting structure, the contact area between the current collector and the battery cover in the battery pole unit is increased and the large-power charging-discharging property and safety property of the battery are increased, thus improving the reliability of lithium-ion power battery during welding and assembling processes. The lithium-ion battery cover and battery pole unit connecting structure is suitable for the demands of large-scale industrialized production.

Description

A kind of lithium-ion battery and battery utmost point group syndeton

Technical field

The utility model relates to technical field of lithium-ion battery, especially a kind of lithium-ion battery and battery utmost point group syndeton.

Background technology

Along with the development of lithium ion battery industry, the maturation of electric vehicle engineering and perfect day by day, the application of power lithium-ion battery also more and more widely, the thing followed is the concerns of people to the lithium ion battery power-performance.

The battery cover of existing lithium-ion-power cell connects with generally all adopting the single lug of a plurality of utmost point groups being connected of battery utmost point group; When high current charge-discharge,, the collector cross section increases owing to causing the battery caloric value for a short time; Thereby battery is caused great damage; Also influenced the high-power efficient that discharges and recharges simultaneously greatly, so a kind of new syndeton of specialized designs has very important production practices meaning to improve the assembly performance of lithium-ion-power cell.

The utility model content

The utility model technical problem to be solved is to provide a kind of lithium-ion battery and battery utmost point group syndeton.

For solving the problems of the technologies described above, the technical scheme of the utility model is:

A kind of lithium-ion battery and battery utmost point group syndeton are made up of battery cover and battery utmost point group, and said battery cover is formed by connecting leader and battery cover board, wherein connects leader and is made up of the battery leader of range upon range of placement; Said battery utmost point group is made up of battery electrode column and collector, and the quantity of collector is identical with the quantity that is connected leader, and said connection leader is riveted together through battery electrode column and battery cover board, and fixing with the collector welding through the excusing from death welding.

Preferably, above-mentioned lithium-ion battery and battery utmost point group syndeton, said connection leader quantity is two, each quantity that connects battery leader in the leader is four.

Preferably, above-mentioned lithium-ion battery and battery utmost point group syndeton, two adjacent in said connection leader battery leaders are orthogonal fixing, or

The battery leader of both sides overlap to be placed in the said connection leader, and all the other battery leaders are symmetrically distributed between the battery leader of these both sides, and with the battery leader vertical fixing in the outside.

Preferably, above-mentioned lithium-ion battery and battery utmost point group syndeton, the said anodal material that connects leader is an aluminium foil, and the material that negative pole connects leader is copper nickel plating, and the material of plus plate current-collecting body is an aluminium strip, and the material of negative current collector is a copper strips.

Preferably, above-mentioned lithium-ion battery and battery utmost point group syndeton applicable to multiple lithium-ion-power cell, are particularly useful for the square high power type lithium ion cell.

The utility model structure has following beneficial effect:

Above-mentioned lithium-ion battery and battery utmost point group syndeton; Increased the contact area of collector and battery cover in the battery utmost point group; The high-power charge-discharge performance and the security performance of battery have been increased; Thereby improved the reliability in lithium-ion-power cell welding and the assembling process, be fit to the needs of large-scale industrial production.

Description of drawings

Fig. 1 is the structural representation of said lithium-ion battery of the utility model and battery utmost point group syndeton;

Fig. 2 be the said lithium-ion battery of the utility model with battery utmost point group syndeton in be connected the structural representation of leader.

Among the figure: 1-connects leader 1-1-battery leader

2-collector 3-battery cover board 4-battery electrode column

Embodiment

For further specifying the utility model, existing conjunction with figs. is set forth in detail:

As depicted in figs. 1 and 2; Said lithium-ion battery and battery utmost point group syndeton are made up of battery cover and battery utmost point group, and said battery cover connects leader 1 by two and forms with battery cover board 3; Wherein each connection leader 1 is made up of four battery leader 1-1 of range upon range of placement; The battery leader 1-1 of both sides overlap to place in the said connection leader 1, and all the other battery leader 1-1 are symmetrically distributed between the battery leader 1-1 of these both sides, and with the battery leader 1-1 vertical fixing in the outside; Said battery utmost point group is made up of battery electrode column 4 and collector 2; The quantity of collector 2 is identical with the quantity that is connected leader 1; Each collector 2 welds together with four battery leader 1-1 of corresponding connection leader 1 through ultra-sonic welded, and 1 of said connection leader is riveted together through battery electrode column 4 and battery cover board 3.

In wherein above-mentioned lithium-ion battery and the battery utmost point group syndeton, anodal connection leader 1 is an aluminium foil, and it is copper nickel plating that negative pole connects leader 1, and plus plate current-collecting body 2 is aluminium strip (two side by side), and negative current collector 2 is copper strips (two side by side).

It is thus clear that; Owing to connect the stacked on top of one another formula design of leader 1; Make an anodal leader 1 that connects to have children outside the state plan welding with four plus plate current-collecting bodies 2, a negative pole connects leader 1 and can have children outside the state plan welding with four negative current collectors 2, has guaranteed the intensity of welding; Effectively increase collector 2 and the contact area that is connected leader 1, thereby improved the performance when battery is high-power to discharge and recharge; Be riveted together closely through battery electrode column 4 and battery cover board 3 and connect leader 1, guaranteed further that again collector 2 is connected with the firm of battery electrode column 4.

The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.

Claims (4)

1. lithium-ion battery and battery utmost point group syndeton are made up of battery cover and battery utmost point group, it is characterized in that: said battery cover is formed by connecting leader and battery cover board, wherein connects leader and is made up of the battery leader of range upon range of placement; Said battery utmost point group is made up of battery electrode column and collector, and the quantity of collector is identical with the quantity that is connected leader, and said connection leader is riveted together through battery electrode column and battery cover board, and fixing with the collector welding.

2. lithium-ion battery according to claim 1 and battery utmost point group syndeton; It is characterized in that: the said anodal material that connects leader is an aluminium foil; The material that negative pole connects leader is copper nickel plating, and the material of plus plate current-collecting body is an aluminium strip, and the material of negative current collector is a copper strips.

3. lithium-ion battery according to claim 1 and 2 and battery utmost point group syndeton is characterized in that: said connection leader quantity is two, and each quantity that connects battery leader in the leader is four.

4. lithium-ion battery according to claim 3 and battery utmost point group syndeton is characterized in that: two adjacent in said connection leader battery leaders are orthogonal fixing, or

The battery leader of both sides overlap to be placed in the said connection leader, and all the other battery leaders are symmetrically distributed between the battery leader of these both sides, and with the battery leader vertical fixing in the outside.

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