CN207651585U - Battery - Google Patents

Abstract

The purpose of this utility model is to provide a kind of batteries, with generating element, shell and block, it is characterized in that, the generating element has anode and cathode, the shell stores the generating element, the external terminal of a side is constituted by being electrically connected with some electrode in above-mentioned positive or negative pole, the opening portion of the shell is closed in the block, it is electrically connected by the opposite electrode of the electrode being connect with the shell among the anode and cathode with the generating element, and constitute the external terminal of another party, the battery also has dead ring, the dead ring is arranged on the edge part of the opening portion in the block Yu the shell, by the shell and the block at least in the radially electric insulation of battery.

Description

Battery

Technical field

The utility model is related to a kind of batteries.

Background technology

In recent years, such as the electronic equipments such as laptop, mobile phone, camera need light-weight and high-energy density two Primary cell.As such secondary cell, have lead battery, nickel-cadmium cell, Ni-MH battery etc. and the higher lithium of energy density from Sub- secondary cell.

As shown in figure 8, such secondary cell 100 for example with：Cell device 101, storage including anode and cathode Cell device 101 and constituted by being electrically connected with cathode external negative terminal bottomed tube shell 102, closing shell 102 opening portion and the block 103 that external positive terminals are constituted by being electrically connected with anode.

Block 103 is pressed into the opening portion of shell 102 and then by ca(u)lk process by block 103 via washer 104 It is fixed on the opening portion of shell 102 and closes the opening portion, cell device 101 is sealed in shell 102 as a result,.This When, battery 100 is exhausted by the block 103 of the shell 102 of external negative terminal and external positive terminals by the washer 104 of insulating properties Edge.

As shown in figure 8, the caulking 106 of shell 102 is only separated by between block 103 at a distance from washer 104, very closely, Battery is easy to happen external short circuit.Therefore, as shown in figure 8, as the countermeasure for preventing external short circuit, in the platform of block 103 Dead ring 108 is placed on the lower position portion of scalariform end 103a and caulking 106, and by being made of insulative resin film Heat-shrinkable T bush 109 cover shell 102 the peripheral surface 102b and dead ring 108 including caulking 106.

Nonetheless, as shown in figure 9, if attaching is bad, there are when gap between dead ring 108 and caulking 106, When thering are the foreign matters such as sharp object to pierce through heat-shrinkable T bush 109, and entering from the gap space between dead ring and block 103, still In the presence of the risk for causing external short-circuit of battery.

Patent document 1：JP2004-158303A

Utility model content

The purpose of this utility model is to provide a kind of batteries that can reliably prevent external short circuit.

The battery of the utility model has generating element, shell and block, which is characterized in that the generating element has Anode and cathode, the shell stores the generating element, by being electrically connected with some electrode in above-mentioned positive or negative pole And constitute the external terminal of a side, the block closes the opening portion of the shell, by anode with the generating element and The electrode opposite with the electrode that the shell is connected electrical connection among cathode, and the external terminal of another party is constituted, the electricity Also there is dead ring, the dead ring to be arranged on the edge part of the opening portion in the block Yu the shell in pond, will be described Shell is with the block at least in the radially electric insulation of battery.

The battery of the utility model can also be that the block is pressed into the opening of the shell via insulating properties washer Thus portion closes the opening portion of the shell.

The battery of the utility model can also be that the block has closes the opening portion via the insulating properties washer Terminal board and the axially external portion of terminal outstanding towards battery that is arranged on the terminal board.

The battery of the utility model can also be that the insulating properties washer extends on the terminal board, compare the shell The edge part of the opening portion of body is closer to the portion of terminal.

The battery of the utility model can also be that the dead ring forms cricoid protruding portion outstanding in lower surface.

The battery of the utility model can also be that the dead ring forms cricoid protruding portion outstanding, institute in lower surface It states protruding portion and fills up the space between the dead ring and the terminal board and the portion of terminal.

The battery of the utility model can also be, and the protruding portion and extend to the insulating properties pad on the terminal board Circle contact.

The battery of the utility model can also be the plastic part that the protruding portion is integrally constituted with the dead ring.

The battery of the utility model can also be the sky between the dead ring and the terminal board and the portion of terminal Between fill up insulating properties solid glue.

Battery according to the present utility model, the dead ring are reliably prevented from the risk of external short-circuit of battery, even if There is impurity to puncture insulating properties casing, due to being provided with protruding portion or insulating properties solid glue between dead ring and terminal board, because This can prevent impurity from making the terminal board as anode and the shell short circuit as cathode.

Description of the drawings

Fig. 1 is the perspective view of the battery of the utility model.

Fig. 2 is the assembling stereogram of the dead ring of the battery of the utility model.

Fig. 3 be the utility model battery in be completed after stereogram.

Fig. 4 A and Fig. 4 B are the stereogram of the dead ring of the battery of the utility model.

Fig. 5 is the partial sectional view of the battery of the utility model.

Fig. 6 is the partial sectional view of the battery of the utility model.

Fig. 7 is the partial sectional view of the battery of another embodiment of the utility model.

Fig. 8 is the battery of the prior art.

Fig. 9 is the battery partial sectional view of the prior art.

Specific implementation mode

In the following, referring to Fig.1, the battery to being applicable in the utility model illustrates.

As shown in Figure 1, battery 2 has the cell device 20 for constituting power generation element, the outside for preventing cell device 20 Dead ring 21, the insulating sleeve 22 of short circuit.

Cell device 20 has the generating element 24 for generating electricity and namely generating electricity, so that ion is moved in generating element 24 The shell 26 of dynamic electrolyte (not shown), storage generating element 24 and electrolyte and the lid for the opening portion for closing shell 26 27。

Generating element 24 is the band-like anode that will use positive active material, is born using the band-like of negative electrode active material Pole is laminated via partition board, and is wound and is constituted in the longitudinal direction.By making such as lithium ion positive, negative Move back and forth between pole, to carry out cell reaction.Such generating element 24 constitutes the power generation element of cell device 20.

In generating element 24, as described above, anode and cathode are laminated and wind via partition board, from the one of winding axis direction Positive terminal is drawn in a end face, and negative terminal is drawn from another end face of winding axis direction.

Shell 26 is, for example, the bottomed tube container being made of conductive metals such as iron, aluminium, stainless steel etc., cylinder bottom 26a The shapes such as rounded, certainly, which, which can also be the other shapes such as rectangular, bottom container.

The negative terminal drawn from another above-mentioned end face of generating element 24 is electrically connected to a bottom by welding etc. 26a, to constitute the external negative terminal of battery 2.

It is provided on the shell 26 near the opening portion of shell 26 around the necking part of whole circumference retraction inwardly 37.When block 27 is closed via the opening portion of the indentation shell 26 of washer 38, which, which is constituted, accepts block 27 Thus the carrier of pedestal determines that block 27 is configured at the position of the opening portion of shell 26, and prevents from being accommodated in shell 26 Interior generating element 24 flies out.

In the shell 26, is storing generating element 24 and block 27 has been pressed into the state of opening portion via washer 38 Under, the edge part 26b of the shell 26 of 27 top of necking part is nearby subjected to bending machining, that is, ca(u)lk inwardly and is processed, constitutes and holds back Seam portion 26c (end of the opening portion of shell).Block 27 is fixedly secured to the member that will hermetically generate electricity by caulking 26c Part 24 is enclosed in shell 26.Here, after implementing ca(u)lk processing, washer 38 is compared in the whole circumference of caulking 26c In caulking 26c, more extend to the sides portion of terminal 41a of block on aftermentioned terminal board 41, to make caulking 26c and block 27 do not contact, to realize insulation.

At least formed with terminal board 41 and portion of terminal 41a in block 27.Terminal board 41 be for via washer 38 by shell The component of 26 opening portion sealing, substantially in disk-shaped (referring to Fig. 4 A and Fig. 4 B).On terminal board 41, it is provided with portion of terminal 41a, portion of terminal 41a for example, by punch process etc. is implemented to discoid metallic plate and formed to be accommodated in shell 26 The axially external section convex shape outstanding of 24 opposite sides of generating element, that is, battery.The diameter of portion of terminal 41a is less than terminal board 41 Diameter, therefore the edge of portion of terminal 41a forms step on terminal board 41.By the matrix part 21a of insulation board 21, washer 38, The lateral edges of terminal board 41 and portion of terminal 41a form certain space.Portion of terminal 41a is the anode that block 27 is connect with the external world The interconnecting piece of side, from external connection terminal such as can by crimping or welding be connected on portion of terminal 41a.Terminal Be formed with space between portion 41a and terminal board 41, such as be accommodated with current cut-off mechanism part, safety valve, PTC element etc..

In addition, being provided with the venthole 41b for escapes such as supplied gas on terminal board 41, the gas etc. is, for example, due to electricity Pond internal pressure rises and breaks through gas etc. of the safety valve (not shown) to outside discharge.Safety valve is provided in block, Chang Shiyong It is made in the component for blocking venthole 41b, such as by rubber etc..

In such cell device 20, as shown in Figure 1, the caulking as the shell of negative outer terminal 26 in order to prevent 26c or shell peripheral surface contact with the block 27 as positive external terminal and cause external short circuit, need to install dead ring 21 And insulating sleeve 22.

Dead ring 21 is configured in the top of the terminal board 41 of block 27, such as by structures such as insulative resin, YuPo synthetic papers At.The dead ring 21 includes the discoid matrix part 21a roughly equal with the outer diameter of the caulking 26c of shell 26 and from base The lower surface protruding portion 21b outstanding of body portion 21a.The thickness of the matrix part 21c of dead ring 21 is formed as compared to portion of terminal 41a It will not be more to axially external prominent.

Dead ring 21 also has central aperture portion 21c (referring to Fig. 2) in center, and dead ring 21 is being placed into terminal board 41 When top, portion of terminal 41a exposes from central aperture portion 21c.

Protruding portion 21b is formed in the lower surface of the matrix part 21a of dead ring 21, is formed as circular, protruding portion 21b's The big and diameter less than matrix part 21 of diameter of the diameter than central aperture portion 21c.Preferably, dead ring 21 is being placed into edge part When on the caulking 26c of 26b, the lower end of protruding portion 21b is abutted with terminal board 41.

Insulating sleeve 22 is such as the tubular film constituted by insulative resin, in the accompanying drawings for convenience's sake, only Illustrate the insulating sleeve 22 of top half.But in fact, the insulating sleeve 22 at least covers the one of the peripheral surface 26d of shell 26 A part for part and caulking 26c and dead ring 21, so that the peripheral surface 26d of the block 27 of anode and the shell 26 of cathode It is spatially segregated from as far as possible, and dead ring 21 can be fixed on cell device 20.In this way, the end with block 27 The lead that daughter board 41 connects will not contact with the peripheral surface 26d of shell 26 or caulking 26c and external short circuit occurs.

Insulating sleeve 22 is to be inserted into cell device 20 by insulating properties tree along the winding axis direction of generating element 24 Among the tubular membrane of the compositions such as fat, by being exposed in defined temperature atmosphere, tubular membrane is shunk, to be close-coupled at battery On the periphery of element 20.In addition, the generally requirement of insulating sleeve 22 is as thin as possible, such as thickness is arrived at several μm between tens of μm, with Just there can be compact structure and save space.

Since the thickness of insulating sleeve 22 is very thin, when battery is impacted, the insulating sleeve 22 is easy breakage.Moreover, As shown in figure 9, dead ring 108 may be tilted because of being impacted.That is, in fig.9, dead ring 108 and caulking 106 it Between generate gap.Conductive impurities etc. may be entered from the gap dead ring 108 and block 103 and stepped end 103a it Between space.At this moment, non-when the thickness or so for being only separated by washer 104 between the caulking of cathode 106 and the block 103 of anode It is often close apart from when, the caulking 106 and block 103 or stepped end 103a may be because above-mentioned conductive impurities and electric Connection, causes the external short circuit of battery.

As shown in Figure 1, the protruding portion 21b of dead ring 21 has been filled up between dead ring 21 and terminal board 41 and portion of terminal 41a Space, by the terminal board 41 of caulking 26c and block 27 or portion of terminal 41a at least in the radially electric insulation of battery. Even if in this way, the gap that conductive impurities generate between dead ring 21 and the caulking 26c of edge part 26b enters dead ring In space between 21 and terminal board 41 and portion of terminal 41a, it can also be stopped by protruding portion 21b and be difficult to and terminal board 41 or end Sub-portion 41a contacts.External short circuit is effectively prevented as a result,.

Fig. 2 and Fig. 3 show the three-dimensional installation diagrams that the dead ring 21 of the utility model is assembled to battery 2.As shown in the drawing, The portion of terminal 41a of the anode of the central aperture portion 21c alignment batteries 2 of dead ring 21 is set to be assembled to battery 2, after the completion of assembling The portion of terminal 41a of the anode of battery 2 exposes from the central aperture portion 21c of dead ring 21 to outside.

Fig. 4 A and Fig. 4 B show the isometric front view and reverse side stereogram of the dead ring 21 of the present invention.

Fig. 5 shows the partial perspective view for the battery 2 that assembly is completed.In the figure, the protruding portion 21b of dead ring 21 fills up exhausted Space between edge ring 21 and the terminal board 41 and portion of terminal 41a of anode.It is excellent to further increase the effect for preventing external short circuit It selects protruding portion 21b and extends to the EDGE CONTACT of the washer 38 on terminal board 41, thus contacted with terminal board 41 in dead ring 21 An insulating point except, and form another insulating point for contacting and generating between protruding portion 21b and washer 38.

As shown in fig. 6, even if being impacted in battery 2, gap is generated between dead ring 21 and caulking 26c, it is external Conductive impurities enter between dead ring 21 and terminal board 41, also can be by the contact point between protruding portion 21b and washer 38 Blocking, to not contacted with terminal board 41.

Above to be illustrated for protruding the dead ring 21 of protruding portion 21b from the lower surface of matrix part 21a, but not It is defined in this, such as can be with as shown in fig. 7, insulating properties solid is filled up in the space between dead ring 21 and the terminal board 41 of anode Glue 32.

As shown in fig. 7, by injecting glue tool on terminal board 41, between portion of terminal 41a and edge part 26b and washer 38 Space fill insulating properties solid glue 32, then, dead ring 31 is configured to caulking 26c and insulating properties solid glue 32 On.It is filled up as a result, by insulating properties solid glue 32 between the terminal board 41, washer 38, portion of terminal 41a of dead ring 21 and anode Space, and dead ring 31 is sticked securely.The insulating properties solid glue 32 can stop that foreign conducting matter etc. enters absolutely Space between the terminal board 41 of edge ring 21 and anode, washer 38, portion of terminal 41a, is reliably prevented external short circuit.In addition, should Insulating properties solid glue 32 can also stick dead ring 31 securely, to prevent dead ring 31 from warpage occurs.

The unlimited specific implementation mode mentioned in this manual of the utility model, without departing from the master of the utility model Purport can carry out various modifications.

Claims (9)

1. a kind of battery has generating element, shell and block, which is characterized in that

The generating element has anode and cathode,

The shell stores the generating element, and one is constituted by being electrically connected with some electrode in above-mentioned positive or negative pole The external terminal of side,

The opening portion of the shell is closed in the block, by with the generating element anode and cathode among with the shell The opposite electrode electrical connection of the electrode that is connected, and the external terminal of another party is constituted,

Also there is the battery dead ring, the dead ring edge part of the opening portion in the block Yu the shell is arranged On, by the shell and the block at least in the radially electric insulation of battery.

2. battery as described in claim 1, which is characterized in that

The block is pressed into the opening portion of the shell via insulating properties washer, thus closes the opening portion of the shell.

3. battery as claimed in claim 2, which is characterized in that

The block, which has, to be closed the terminal board of the opening portion via the insulating properties washer and is arranged on the terminal board The axially external portion of terminal outstanding towards battery.

4. battery as claimed in claim 3, which is characterized in that

The insulating properties washer extends on the terminal board, compared to the shell the opening portion edge part closer to institute State portion of terminal.

5. battery as described in claim 1, which is characterized in that

The dead ring forms cricoid protruding portion outstanding in lower surface.

6. battery as claimed in claim 3, which is characterized in that

The dead ring forms cricoid protruding portion outstanding in lower surface, and the protruding portion fills up the dead ring and the end Space between daughter board and the portion of terminal.

7. battery as claimed in claim 6, which is characterized in that

The protruding portion and extend to the insulating properties washer contacts on the terminal board.

8. battery as claimed in claim 5, which is characterized in that

The plastic part that the protruding portion is integrally constituted with the dead ring.

9. battery as claimed in claim 3, which is characterized in that

Insulating properties solid glue is filled up in space between the dead ring and the terminal board and the portion of terminal.