CN101388462A

CN101388462A - Pole plate for battery pack

Info

Publication number: CN101388462A
Application number: CNA2007101454571A
Authority: CN
Inventors: 王晏; 方平福; 王为希
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-13
Filing date: 2007-09-13
Publication date: 2009-03-18

Abstract

The invention relates to a polar plate for a battery packet, which comprises a copper plate, a copper/aluminum composite plate or a nickel/copper/technological stainless steel composite plate. The invention is characterized in that the polar plate is connected or is welded with a folding polar ear, a bending polar ear or a double-tongue polar ear which is cut. And the polar ears are formed by copper plates, copper/aluminum composite plates or nickel/copper/technological stainless steel composite plates. The polar plate solves the problem of welding different materials, which can achieve duplex spot welding with a battery electrode, and improve the welding quality and conductive level.

Description

A kind of pole plate for battery pack

(1) technical field

The present patent application relates to a kind of pole plate for battery pack, is specifically related to a kind of electrokinetic cell bag pole plate.

(2) background technology

At present, domestic electric motor car generally adopts and can not realize that the above battery of the big capacity 50～100A of the LiMn2O4 of producing in batches carries out also, series connection, thereby the mode that forms the electrokinetic cell bag is the vehicle power supply, in safety, reliably, durable and level of informatization aspect control system all can not satisfy the basic need of urban public transport, especially its coefficient of safety is compared to lack effectively than LiFePO 4 high power capacity cell and is ensured, but for cylindrical LiFePO 4 high power capacity cell bag, the pole plates used material often material with battery electrode (male or female) is different, cause between unlike material to be electrically connected badly, influenced useful life of power brick.

In view of the above problems, the spy proposes a kind of pole plate of battery pack, LiFePO 4 high power capacity cell is used for the electrokinetic cell bag of electric motor car.

(3) summary of the invention

The purpose of this invention is to provide a kind of battery pack electrode pad that constitutes by composite material, to realize good being connected between pole plate and the battery;

Another object of the present invention provides a kind of pole plate that has two tongue lugs, and this pair tongue lug is to be made and be welded on the pole plate by composite material folding or bending, or a kind of pole plate of the two tongue lugs that punch out is provided.

The purpose of this invention is to provide a kind of pole plate that has the two tongue lugs that to realize the two point welding.

Be achieved through the following technical solutions above-mentioned purpose:

A kind of pole plate for battery pack, this pole plate is made of copper coin, aluminium sheet, copper/aluminum composite plate or nickel/copper/technology stainless steel clad plate, the lug that connects or be welded with collapsible lug, folding type lug or punch out on this pole plate; The lug that punches out is single tongue lug, two tongue lug or dovetail type lug, and intends making the welding job point on the welding position at lug.

Described lug also is to be made of copper coin, aluminium sheet, copper/aluminum composite plate or nickel/copper/technology stainless steel clad plate.Each lug is the electrode of a corresponding battery all.Employing between lug and electrode, lug and the battery is welded to connect.Being connected between lug and electrode, lug and the battery guaranteed with welding between the material.

Can expand according to vehicle-mounted space ampere/hour effective parallel connection, adapt to the automobile improvement of different model and purposes.The design of lug/pole plate one realizes the maximization of cell efficient, the current flow path equalization of the cell after the assurance parallel connection, and the ingenious Welding Problems of having avoided between the unlike material.Realize the 5C (multiplying power that 5C promptly discharges and recharges, 5C is exactly the electric weight that charges and discharge of five times of battery self rated capacities) discharge and recharge, can be full of in 15 minutes, life-span can reach 1700 times, 80%DOD (DOD is the load capacity of battery), fundamentally solve the contradiction between cost performance and safety durable, solved the technological difficulties problem that the world is managing to solve with the provisional capital.

(4) description of drawings

Fig. 1 is the sectional view that is connected with the pole plate of battery;

Fig. 2 is the pole plate that has two tongue lugs;

Fig. 3 is first embodiment that pole plate connects lug;

Fig. 4 is second embodiment that pole plate connects lug;

Fig. 5 is the 3rd embodiment that pole plate connects lug.

Fig. 6 is a kind of bending sectional view of lug;

Fig. 7 is the bending sectional view of another kind of lug.

(5) embodiment

Domestic electric motor car generally adopts and can not realize that the above battery of the big capacity 50～100A of the LiMn2O4 of producing in batches carries out and connects, at the basic need that can not satisfy urban public transport aspect the level of informatization of safety, reliable, durable and control system.When adopting the higher LiFePO 4 high power capacity cell of coefficient of safety, being electrically connected the useful life that tends to influence battery between pole plate and battery proposes a kind of brand-new pole plate for battery pack for this reason.

As shown in fig. 1, the inside of this electrokinetic cell bag is to be made of plate 1, cathode plate 2 and the lug 3 that is welded on the pole plate, be contained with a plurality of batteries 4 between plate (bus-bar) 1 and cathode plate (bus-bar) 2, it is chargeable dry cell that this battery 4 can adopt cylindrical (or cube or rectangle) LiFePO 4 high power capacity cell.Plate 1, cathode plate 2 and lug 3 all are to adopt copper coin, copper/aluminum composite plate or the stainless composite board of nickel/copper/technology to make, and also can adopt the design of lug 3 and

pole plate

1,2 one, realize the maximization of cell efficient.

As shown in fig. 1, wherein the terminals of the plate 1 of battery 4 are drawn from the left side (left side of accompanying drawing paper) of plate 1, and the terminals of the cathode plate 2 of battery 4 are drawn from the right side (right side of accompanying drawing paper) of cathode plate 2, like this for the flow through pole plate of same distance of each battery 4 its electric current wherein, the current flow path equalization of the cell after the assurance parallel connection, thereby balanced each battery 4 that uses.Design to lug 3 has been shown among Fig. 1 and Fig. 2.In Fig. 1 and Fig. 2, the Kong Yiduan that lug 3 passes on the

pole plate

1,2 is welded on the

pole plate

1,2, and the other end is welded on the battery 4.Material therefor is copper coin, copper/aluminum composite plate, nickel/copper/conductive plates such as technology stainless steel composite plate in lug 3 and the design of

pole plate

1,2 one, adopt folding in the welding or the bending processing, make the corresponding separately required material of both positive and negative polarity, thereby realize with the welding between the material, just can guarantee firmness with the spot welding of quality storeroom, solve the problem of welding between unlike material dexterously, made this power brick satisfy the use needs of city bus fully.So just can guarantee that described lug 3 is to be welded on plate 1 and/or the cathode plate 2 after folding, and guarantees with welding between the material.

Certainly, described lug 3 is also can adopt integrated mode with plate 1 and cathode plate 2.As shown in Fig. 2 a-2c, lug wherein is two tongue lugs 6, the production method of this lug is at pole plate 1, punch out a plurality of holes 5 on 2, and in hole 5, reserve two tongue lugs 6, free end at two tongue lugs 6 is that front end forms two ligule ends, these two ligule ends are used to be welded to battery electrode, lug wherein (is seen Fig. 2 a) for two tongue lugs, single tongue lug (seeing Fig. 2 c) or dovetail type lug (seeing Fig. 2 b), the production method of this lug is at pole plate 1, punch out a plurality of holes 5 on 2, and reserve two tongue lugs 6 or single tongue lug 6 and dovetail type lug 6, free end at two tongue lugs is that front end forms two ligule ends, and these two ligule ends are used to weld battery electrode.

See Fig. 3-5, show several different bending mode of lug 3 respectively.In Fig. 3, the pole plate that adopted 1,2 is composite plate, and lug 3 also is to adopt that composite plate is folding to form, and realizes connection or welding between the identical material like this when guaranteeing that lug 3 is connected or welded on

pole plate

1,2 and the battery 4 respectively.In Fig. 3, the anode of battery 4 and cathode side lug 3 all are to adopt folding mode, and are welded on the

pole plate

1,2; Then be to adopt flat folding and foldingly be welded on plate 1 and/or the cathode plate 2 after combined in Fig. 4 and Fig. 5, and guarantee with the welding between the material.

In order to increase the firmness of welding, we further propose to intend making the welding job point on the welding position at lug, are called for short " doing a little "., intend making the welding job point on the welding position at lug just when punching press one bus-bar (plate, cathode plate) as Fig. 6-7, be called for short and do a little 11, concrete bending mode can be referring to accompanying drawing 6-7.All electric conductivity good metal materials can produce problems such as rosin joint or firmness when carrying out the unlike material welding, the processing mode of doing has a little been avoided the problems referred to above.

The design of this pole plate be achieved its overall dimensions with fixed than being designed to the basic standard module, connect the priming line of force according to the different demands of different vehicle from X, Y, three directions of Z, guarantee can utilize maximum load in the space at vehicle.Invention be electrokinetic cell in practical field ' flex point ' though with prior art continuously but can not lead.

Above listed a series of detailed description only is specifying at feasibility embodiment of the present invention, but this embodiment is not in order to limit claim of the present invention, allly do not break away from equivalent embodiment or the change that skill spirit of the present invention is done, for example, equivalence embodiment Deng changing all should be contained within the claim of this case.

Claims

1. pole plate for battery pack, this pole plate is constituted, be it is characterized in that by copper coin, aluminium sheet, copper/aluminum composite plate or nickel/copper/technology stainless steel clad plate: the lug that connects or be welded with collapsible lug, folding type lug or punch out on this pole plate.

2. according to the pole plate for battery pack described in the claim 1, it is characterized in that: the lug that punches out is single tongue lug, two tongue lug or dovetail type lug, and intends making the welding job point on the welding position at lug.

3. according to the pole plate for battery pack described in the claim 1, it is characterized in that: described lug also is to be made of copper coin, aluminium sheet, copper/aluminum composite plate or nickel/copper/technology stainless steel clad plate.

4. according to the pole plate for battery pack described in the claim 1, it is characterized in that: each lug is the electrode of a corresponding battery all.

5. according to the battery pack electrode described in the claim 1,2 or 3, it is characterized in that: the employing between lug and electrode, lug and the battery is welded to connect.

6. according to the battery pack electrode described in the claim 1,2 or 3, it is characterized in that: being connected between lug and electrode, lug and the battery guaranteed with welding between the material.