CN2665940Y

CN2665940Y - Alkaline secondary cell capable of collecting current effectively

Info

Publication number: CN2665940Y
Application number: CNU2003201180333U
Authority: CN
Inventors: 刘斌; 刘菊; 彭全旺; 王中明
Original assignee: JIASHIDE BATTERY CO Ltd SHENZHEN CITY
Current assignee: JIASHIDE BATTERY CO Ltd SHENZHEN CITY
Priority date: 2003-11-11
Filing date: 2003-11-11
Publication date: 2004-12-22
Anticipated expiration: 2013-11-11

Abstract

The utility model discloses an alkaline secondary battery that can effectively collect the current, and the utility model is characterized in that a strip notch (31) is arranged on a confluence conductive disk (3) that is connected with a negative plate at the bottom of an electrical core (2) and a metal shell (1) in the alkaline secondary battery, the connecting between line between the two ends of the strip notch (31) forms a sharp corner with a positive tangent that goes through the outer end of the strip notch and points to the inward coiling direction of the electrical core (2); the confluence conductive disk is connected with the negative plate through the furls (32) along the two sides of the strip notch. As the strip notch does not directly point to the circle center of the confluence conductive disk, but deviates with an certain angle, when the electrical core rotates, the furl which is connected with the negative plate and is arranged on the strip notch maintains or strengthens the tightness of the electrical core winding, therefore, the contact resistance in the battery can not rise and the stability and security of the battery electrochemical performance are maintained.

Description

The alkaline secondary cell that can effectively compile electric current

Technical field

The utility model relates to a kind of high-multiplying power discharge alkaline secondary cell, specially refers to the conductive plate that confluxes of alkaline secondary cell.

Background technology

Existing alkaline secondary cell generally comprises metal shell, and place parts such as electric core that are wound into by positive plate, negative plate and the diaphragm paper between positive plate and negative plate in the metal shell, positive plate and the negative plate segment distance that need stagger when reeling, draw positive pole with a end easily from positive plate, correspondingly draw negative pole from the other end at electric core.In order to make the negative pole and the current delivery usefulness between the metal shell of drawing higher, generally between negative plate and metal shell, also be provided with the conductive plate that confluxes that all is connected with negative plate and metal shell, by the conductive plate delivered current that confluxes.Usually,, also to a plurality of apertures be arranged, can utilize the burr of a plurality of apertures to guarantee negative plate and the current delivery between the conductive plate of confluxing with contacting of negative plate in the conductive plate upper punch of confluxing for the negative pole that makes electric in-core is connected with the conductive plate that confluxes or contacts.

But, the defective of the alkaline secondary cell of this structure mainly is: because the burr height that punching forms is uneven, negative pole distributes with the conductive plate contact point that confluxes and is inhomogeneous, in fact, because the hole is very little, negative plate is similar to a contact with contacting of the conductive plate that confluxes, the contact performance of feasible conflux conductive plate and negative plate is also bad, electric current confluxes inhomogeneous, produce defectives such as internal resistance of cell rising, especially needing the occasion of high-multiplying power discharge, when using on electric tool, the aforementioned currents uneven shortcoming of confluxing will be more obvious, even can occur causing causing phenomenons such as potential safety hazard because of part conduction heat accumulation.For this reason, the patent No. is 4529675, open day be that the american documentation literature on July 16th, 1985 discloses a kind of conductive plate that confluxes, on the conductive plate that confluxes, evenly be provided with four bar shaped notches that directly point to the center of circle of the conductive plate that confluxes, and each bar shaped notch turned up along its edge, the conductive plate that confluxes is turned up with negative plate by this and is connected.

Yet, this structure improved battery is defectiveness also: because when assembling, the electricity core generally is to rotate along himself coiling direction to fill in the metal shell, negative plate in electric core bottom rotates in the process that contacts with the burr of spot distribution, the active force that burr gives negative plate is positive tangential force, the elasticity of electric core winding is strengthened, and in the process that battery uses, outside vibration also can have influence on the electric core of inside battery, obviously, keep or guarantee that the elasticity of electric core winding can make the performance parameter of battery more stable, and the battery of existing this structure does not have such effect.

Summary of the invention

Technical problem to be solved in the utility model is intended to propose a kind of in assembling or the process used, can either keep or guarantee that the elasticity of electric core winding also can effectively compile the alkaline secondary cell of electric current.

According to the utility model, a kind of alkaline secondary cell that can effectively compile electric current, comprise metal shell, and place the electric core that is wound into by positive plate, negative plate and the diaphragm paper between positive plate and negative plate in the described metal shell, described positive plate and negative plate stagger mutually so that described electric core can be drawn the positive pole of battery at the top, draw negative pole in the bottom; Between the bottom of described electric core and metal shell, also be provided with the conductive plate that confluxes that all is connected with negative plate and metal shell, the described conductive plate that confluxes is provided with the bar shaped notch, it is characterized in that: the line between two ends of described bar shaped notch and through the outer end of bar shaped notch and point between the positive tangent of the direction that involves in of described electric core a wedge angle is arranged, the described conductive plate that confluxes joins by the turning up with described negative plate of both sides along described bar shaped notch.

After adopting the utility model, the negative plate of battery is to join by the folding up of both sides along the bar shaped notch with the conductive plate that confluxes, because this is turned up itself is continuous strip, like this, contacting of that negative plate and the conductive plate that confluxes are actually wire rather than point-like, when the vibration influence in the external world arrives electric core, can not reduce the negative plate and the excellent contact between the conductive plate of confluxing; Simultaneously, because the bar shaped notch does not directly point to the center of circle of the conductive plate that confluxes, but certain angle is arranged partially, like this, in the process of assembling or use, when electric core rotates, can make the elasticity of electric core winding can not change with turning up of joining of electric core or negative plate on the bar shaped notch, even also can be strengthened, thereby can not influence the contact of negative plate and the conductive plate that confluxes or be connected effect, alkaline secondary cell of the present utility model is needing the occasion of high-multiplying power discharge, and performance is more stable.

The purpose of this utility model, feature and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.

Description of drawings

Fig. 1 is a decomposition texture schematic diagram of the present utility model;

Fig. 2 is the position simplified schematic diagram of bar shaped notch described in the utility model on the conductive plate that confluxes;

Fig. 3 is the structural representation of the conductive plate that confluxes described in the utility model.

Concrete execution mode

With reference to accompanying drawing 1, alkaline secondary cell described in the utility model, comprise metal shell 1, and place in the described metal shell 1 by positive plate, negative plate and be inserted in positive plate and negative plate between the electric core 2 that is wound into of diaphragm paper, positive plate and negative plate stagger mutually in common mode so that described electric core can be drawn the positive pole of battery at its top, draw negative pole in its bottom; Generally speaking, negative plate below electric core 2 (or bottom) stretches out or projection, correspondingly, positive plate stretches out or projection in the above, because these characteristics do not have the different of essence with prior art, thereby, negative plate, positive plate and diaphragm paper are not shown among the figure especially; Between the bottom of described electric core and metal shell 1, also be provided with the conductive plate 3 that confluxes that all is connected with negative plate and metal shell 1, the conductive plate that confluxes is provided with bar shaped notch 31, line between two ends of described bar shaped notch 31 and through the outer end of bar shaped notch and point between the positive tangent of the direction that involves in of described electric core a wedge angle is arranged, conflux conductive plate 3 by 32 joining with negative plate (being exactly electric core bottom as shown in fig. 1) along turning up of the both sides of bar shaped notch 31, when especially electric core is subjected to vertical forces, turning up of bar shaped notch both sides can be inserted in the negative plate, like this, the negative plate that is positioned at the bottom of electric core 2 has just been realized contacting with the wire of the conductive plate 3 that confluxes by turning up 32, connect, extraneous vibrations and electric core the moving in metal shell that can not cause, the contact condition that the bottom that also just can not destroy or reduce electric core 2 is original with the conductive plate 3 of confluxing, the contact resistance that is inside battery can not raise, the stability and the security performance that keep battery performance, these advantages are needing the occasion of high-multiplying power discharge, and are particularly useful when using alkaline secondary cell in the electric tool.

For further improving Practical Performance of the present utility model, aforesaid bar shaped notch is provided with three, four at least, also can have more a plurality of, four bar shaped notches have been shown among Fig. 3, described each bar shaped notch is evenly distributed on the described conductive plate that confluxes, certainly, aforesaid uniformity also need not be absolute, as long as make electric core 2 can roughly ajust not deflection and stably supported in metal shell 1, on the conductive plate 3 that confluxing.

In the process for feasible assembling or use battery, keep the elasticity of electric core winding, the utility model is especially with the line between two ends of described bar shaped notch and through the outer end of bar shaped notch and point between the positive tangent of the direction that involves in of described electric core and be provided with a wedge angle A, concrete structure can be with reference to shown in Figure 2, involute among the figure is for the positive plate in the electric core is shown, the coiling direction of negative plate and diaphragm paper, the described direction that involves in is meant the direction of arrow that is indicated among Fig. 2 on this involute, be that described bar shaped notch is an oblique bar shaped notch, and no longer be to resemble the conflux center of circle of conductive plate of the direct sensing described in the aforesaid U.S. Patent document, making this improved purpose is to rotate at electric core to fill in the metal shell, when the negative plate of electric core bottom with turn up 32 when contacting, it also is oblique turning up 32 active forces that give negative plate, in fact this skew force can resolve into two component: one is the opposite resistance of tangent direction to that indicated in the drawings, and this component also has in the prior art; Also one is exactly the component that points to the conductive plate center of confluxing, and this is to produce not come out in the aforesaid U.S. Patent document and on the burr of spot distribution, also this component can strengthen can keeping at least the elasticity of electric core winding just, and, in the process of using battery, identical effect when giving electric core, the shock transfer in the external world is arranged also.Described wedge angle A preferably is chosen in 45 °～85 °, and is too big, and component entad is too small, is difficult to show aforementioned effect; The too little negative plate that can reduce be connected the strong degree that contacts with the conductive plate that confluxes.

In order to make negative plate be connected the more tight of contact with the conductive plate that confluxes, as shown in Figure 3, can with described turn up 32 meet to described electric core the direction that involves in (being the direction of arrow shown in Figure 3) and and the plane at the described conductive plate place of confluxing between an oblique angle B is arranged, purpose also is to reduce the contact resistance of battery, fill in the metal shell because rotating at electric core, perhaps when downward pressure that electric core is subjected to that the external world applies, aforesaidly turn up 32 and can more easily inlay in the negative plate of into electric core bottom, make conflux conductive plate and negative plate in conjunction with more tight, thereby the internal resistance that guarantees battery is not because of the variation of behaviour in service raises, and improves the high-multiplying power discharge characteristic of battery.Described oblique angle B preferably is chosen as 50 °～85 °.Because, B is excessive when the oblique angle, even become the right angle, when electric core precession, turn up 32 and can stir along the direction of electric core rotation, like this, might make oblique angle B become the obtuse angle and do not reach the purpose of inlaying or lunging negative plate, and then the compactness of influence contact, and oblique angle B is too small, when being stressed, insert depth is also undesirable.

Need to prove; the utility model is when having a plurality of bar shaped notch; in fact do not need each bar shaped notch shape and structure in full accord; what comprise bar shaped notch both sides turns up 32; as long as even have and on one side also can reach the utility model purpose substantially, should these simple conversion all still within protection range of the present utility model.

Claims

1. alkaline secondary cell that can effectively compile electric current, comprise metal shell (1), and place in the described metal shell (1) by positive plate, negative plate and be inserted in positive plate and negative plate between the electric core (2) that is wound into of diaphragm paper, described positive plate and negative plate stagger mutually so that described electric core (2) can be drawn the positive pole of battery at the top, draw negative pole in the bottom; Between the bottom of described electric core (2) and metal shell (1), also be provided with the conductive plate that confluxes (3) that all is connected with negative plate and metal shell (1), the described conductive plate that confluxes is provided with bar shaped notch (31), it is characterized in that: the line between two ends of described bar shaped notch (31) and through the outer end of bar shaped notch and point between the positive tangent of the direction that involves in of described electric core (1) wedge angle is arranged, the described conductive plate that confluxes joins with described negative plate by turn up (32) along the both sides of described bar shaped notch.

2. the alkaline secondary cell that can effectively compile electric current as claimed in claim 1 is characterized in that: described bar shaped notch (31) has three at least, and described each bar shaped notch is evenly distributed on the described conductive plate that confluxes (3).

3. the alkaline secondary cell that can effectively compile electric current as claimed in claim 1 or 2 is characterized in that: described wedge angle is 45 °～85 °.

4. the alkaline secondary cell that can effectively compile electric current as claimed in claim 3 is characterized in that: described turning up (32) meet to the direction that involves in of described electric core (1) and and the plane at the described conductive plate that confluxes (3) place between an oblique angle is arranged.

5. the alkaline secondary cell that can effectively compile electric current as claimed in claim 4 is characterized in that: described oblique angle is 50 °～85 °.