CN102263256B

CN102263256B - Negative plate and battery

Info

Publication number: CN102263256B
Application number: CN201110173724.2A
Authority: CN
Inventors: 李文良; 苏养湘; 秦保太; 李兴松; 孔令坤
Original assignee: Shenzhen Highpower Technology Co Ltd
Current assignee: Shenzhen Highpower Technology Co Ltd
Priority date: 2011-06-24
Filing date: 2011-06-24
Publication date: 2014-06-18
Anticipated expiration: 2031-06-24
Also published as: CN102263256A

Abstract

The invention relates to a negative plate which has two ends along a winding direction, wherein one end is a winding starting end and the other end is a tail end; and the width of the negative plate is gradually increased along the winding direction from the winding starting end to the tail end. The negative plate provided by the invention is characterized in that the width of the negative plate is gradually increased along the winding direction from the winding starting end to the tail end and the width of the winding starting end is less than the width of the rest part of the negative plate. When a nickel hydrogen battery is in a charged/discharging process and the negative plate swells and grows tall, since the width of the winding starting end is less than the width of the rest part of the negative plate and a certain height difference exists, the winding starting end of the negative plate after swelling can hardly contact with a current collector, a positive cap and the like and cannot be burnt, thereby efficiently preventing a battery from being damaged and scrapped.

Description

Negative plate and battery

[technical field]

The present invention relates to a kind of negative plate and battery.

[background technology]

At present, Ni-MH battery is in charge and discharge process, and the situation that expands and grow tall easily appears in negative plate, especially grows tall even more serious near near negative plate negative plate roll set end.After negative pole grows tall, easily contact with collector, positive electrode cap etc. and occur burning, causing battery to damage, battery cannot be used and scrap.

[summary of the invention]

In view of this, be necessary to provide a kind of negative plate that prevents that battery from damaging.

A kind of negative plate, has two ends along coiling direction, and wherein one end is roll set end, and the other end is tail end, and described negative plate width becomes large gradually along coiling direction from roll set end to tail end.

Preferably, described negative plate is domatic along coiling direction, and width is progressively increased by described roll set end to tail end.

Preferably, described negative plate is notch cuttype along coiling direction, the ladder of described roll set end in width minimum.

Preferably, described negative plate forms by the different sub-negative plate of multiple width is end to end, and the sub-negative plate of width minimum is in roll set end.

Preferably, described roll set end width is 32 to 49 millimeters, and described aftermost breadth scope is 42 to 50 millimeters, and between described roll set end and tail end, stand out is 0.1 millimeter to 10 millimeters.

A kind of battery, comprises positive plate, barrier film and negative plate, and described negative plate has two ends along coiling direction, wherein one end roll set end, and the other end is tail end, described negative plate width becomes large gradually along coiling direction from roll set end to tail end.

Above-mentioned negative plate and battery, negative plate width becomes large gradually along coiling direction from roll set end to tail end, the width of roll set end is less than the width of negative plate remainder, when Ni-MH battery is in charge and discharge process, negative plate occurs expanding while growing tall, because the width of roll set end is less than the width of negative plate remainder, there is certain difference in height, after negative plate roll set end grows tall, be difficult for contacting with collector, positive electrode cap etc. and burning, thereby effectively prevent from causing battery to damage, avoid battery to scrap.

[brief description of the drawings]

Fig. 1 is the structural representation of negative plate in an embodiment;

Fig. 2 is the structural representation of negative plate in another embodiment;

Fig. 3 is the structural representation of negative plate in another embodiment;

Fig. 4 is the structural representation of negative plate in another embodiment.

[embodiment]

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.

This negative plate has two ends along coiling direction, and wherein one end is the roll set end while reeling, and the other end is tail end, negative plate Width is vertical with coiling direction, negative plate broad ways has both sides, is respectively the upside relative with positive electrode cap, and with the opposing downside of positive electrode cap.This negative plate width becomes greatly gradually along coiling direction from roll set end to tail end, and the width of roll set end is less than the width of negative plate remainder.

Fig. 1 is the structural representation of negative plate in an embodiment.For making negative plate 100 be convenient to the neat degree of reeling and reeling, this negative plate 100 is domatic along coiling direction, and width is progressively increased to tail end 120 by roll set end 110, and the width of roll set end 110 is less than the width of negative plate 100 remainders.Simultaneously, can not cause battery to scrap for ensureing that negative plate 100 width meet after the normal requirement using of battery and negative plate 100 grow tall, in a preferred embodiment, negative plate downside 140 levels are unchanged, upside 130 is domatic and broadens gradually, roll set end 110 width ranges are 32 to 49 millimeters, and tail end 120 width ranges are 42 to 50 millimeters, and between roll set end 110 and tail end 120, stand out is 0.1 millimeter to 10 millimeters.

Fig. 2 is the structural representation of negative plate in another embodiment.This negative plate 200 is stairstepping along coiling direction, the ladder of roll set end 210 in width minimum.Can not cause battery to scrap for ensureing that negative plate 200 width meet after the normal requirement using of battery and negative plate 200 grow tall, in a preferred embodiment, this negative plate is secondary ladder, negative plate downside 240 levels are unchanged, upside 230 is stairstepping and broadens gradually, and roll set end 210 and tail end 220 are respectively in one-level ladder.Roll set end 210 width are 32 to 49 millimeters, and tail end 220 width ranges are 42 to 50 millimeters, and between roll set end 210 and tail end 220, stand out is 0.1 millimeter to 10 millimeters.

Fig. 3 is negative plate structure schematic diagram in another embodiment.Shown in this negative plate 300 and Fig. 1, negative plate difference is, negative plate 300 width are progressively increased by roll set end 310 to negative plate middle part, are domatic layout, and the gradient is 0 to 90 degree; Negative plate 300 width are identical to tail end 320 by negative plate middle part.

Fig. 4 is the structural representation of negative plate in another embodiment.This negative plate 400 is with negative plate difference shown in Fig. 2, is provided with the above ladder of two-stage between roll set end 410 and tail end 420.

Negative plate described in Fig. 1 to Fig. 4 is all one-body molded by the mode such as die-cut, to cut.

This negative plate, the width of roll set end is less than the width of negative plate remainder, when Ni-MH battery is in charge and discharge process, negative plate occurs expanding while growing tall, because the width of roll set end is less than the width of negative plate remainder, there is certain difference in height, after growing tall, negative plate roll set end is difficult for contacting with collector, positive electrode cap etc. and burning, thereby effectively prevent from causing battery to damage, avoid battery to scrap.

In other embodiments, negative plate also can form by the different sub-negative plate of multiple width is end to end, and the sub-negative plate of width minimum is in roll set end.

In addition, also provide a kind of battery, this battery comprises positive electrode cap, positive plate, negative plate, barrier film etc., and wherein, negative plate is above-mentioned negative plate.

The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims

1. a negative plate, there are two ends along coiling direction, wherein one end is roll set end, the other end is tail end, it is characterized in that, described negative plate Width is vertical with coiling direction, and the both sides of described negative plate broad ways are relative and opposing respectively with positive electrode cap, and described negative plate width becomes large gradually along coiling direction from roll set end to tail end; Described negative plate forms by the different sub-negative plate of multiple width is end to end, and the sub-negative plate of width minimum is in roll set end.

2. negative plate according to claim 1, is characterized in that, described negative plate is domatic along coiling direction, and width is progressively increased by described roll set end to tail end.

3. negative plate according to claim 1, is characterized in that, described negative plate is notch cuttype along coiling direction, the ladder of described roll set end in width minimum.

4. according to the arbitrary described negative plate of claims 1 to 3, it is characterized in that, described roll set end width is 32 to 49 millimeters, and described aftermost breadth scope is 42 to 50 millimeters, and between described roll set end and tail end, stand out is 0.1 millimeter to 10 millimeters.

5. a battery, comprise positive plate, barrier film and negative plate, described negative plate has two ends along coiling direction, wherein one end roll set end, the other end is tail end, it is characterized in that, described negative plate Width is vertical with coiling direction, the both sides of described negative plate broad ways are relative and opposing respectively with positive electrode cap, and described negative plate width becomes large gradually along coiling direction from roll set end to tail end; Described negative plate forms by the different sub-negative plate of multiple width is end to end, and the sub-negative plate of width minimum is in roll set end.

6. battery according to claim 5, is characterized in that, described negative plate is domatic along coiling direction, and width is progressively increased by described roll set end to tail end.

7. battery according to claim 5, is characterized in that, described negative plate is notch cuttype along coiling direction, the ladder of described roll set end in width minimum.

8. according to the arbitrary described battery of claim 5 to 7, it is characterized in that, described roll set end width is 32 to 49 millimeters, and described aftermost breadth scope is 42 to 50 millimeters, and between described roll set end and tail end, stand out is 0.1 millimeter to 10 millimeters.