WO2010015213A1

WO2010015213A1 - Battery and its assembly method

Info

Publication number: WO2010015213A1
Application number: PCT/CN2009/073155
Authority: WO
Inventors: 郭春泰; 刘方; 朱礼仁
Original assignee: 深圳市比克电池有限公司
Priority date: 2008-08-08
Filing date: 2009-08-10
Publication date: 2010-02-11
Also published as: CN101645520A

Abstract

A battery comprises a battery core (8), a cover (1) and a shell (9). An elastic conductive ring (5) is set on an insulation ring (6) which is laid at the end of the battery core (8). An electrode tab (7) is extended from the end of the batter core (8) and passes through the hole (601) of the insulation ring (6).The electrode tab and the elastic conductive ring (5) are electrically connected. The elastic conductive ring (5) and the cover (1) are also electrically connected. The electrode tab (7), the elastic conductive ring (5) and the cover (1) are connected through a pressing force without welding.

Description

Manual battery and assembly method thereof

Technical field

[1] The present invention relates to a battery and an assembly method.

Background technique

[2] A lithium ion secondary battery consists of a negative electrode plate, a positive electrode plate, an electrolyte, and a separator that prevents short circuit between the positive and negative plates. The positive electrode plate and the negative electrode plate are formed into a thin plate or a foil shape, and then the positive and negative electrode plates and the separator interposed therebetween are sequentially laminated or spirally wound to form a battery core, and then the battery core is filled with stainless steel, nickel-plated iron, In an aluminum metal casing or a laminated flexible packaging film battery container, an electrolyte is injected and sealed to form a battery. The electrical conduction between the cell and the outside is achieved by the connection of the tabs and the poles or cover plates connected to the plates.

[3] The current universal connection method is to connect a plurality of tabs on a plate by ultrasonic welding or metal fusion welding, and then connect the connected plurality of tabs to one end of a metal conductor, the metal conductor The other end of the battery is electrically connected to the upper and lower end covers of the battery case, thereby achieving a conductive connection between the plate tab and the battery case conductive post. However, in the production of batteries, the method is complicated to operate, especially in the case of melting and soldering, which is prone to splashing of metal particles, which has a great influence on the safety and performance of the batteries, and the mutual penetration welding is also inconvenient due to mechanical vibration and operation. The connection between the tab and the plate forms a strain and affects the performance of the battery.

Disclosure of invention

technical problem

[4] The technical problem to be solved by the present invention is to provide a battery which does not require soldering and which has high assembly efficiency and a method of assembling the same.

Technical solution

[5] The technical solution adopted by the present invention to solve the technical problem thereof is: a battery comprising a battery core, a cover plate and a casing, the end of the battery core projecting with a tab, the end of the battery core An insulating spacer and an elastic conductive crucible disposed on the insulating spacer, the tab passing through the aperture on the insulating spacer and electrically connected to the elastic conductive crucible, the elastic conductive crucible and the cover The board is electrically connected. [6] The electrical connection of the elastic conductive crucible to the cover is a contact electrical connection.

[7] The battery is further provided with an elastic pressing piece, and the elastic pressing piece presses the elastic conductive crucible, and the elastic conductive crucible is electrically connected to the cover plate through the elastic pressing piece.

[8] The insulating spacer is provided with a mounting step, and the outer edges of the elastic conductive cymbal and the elastic pressing piece are locked in the mounting step.

[9] The mounting step is a plurality of mounting buckles disposed on an inner wall of the insulating spacer. The mounting step is an annular mounting groove disposed on an inner wall of the insulating spacer.

[10] The battery is further provided with a staple, one end of the staple is provided with a pressing surface, and the elastic pressing piece is pressed on the elastic conductive raft by the pressing surface, the staple The other end is provided with a card slot, and the insulating spacer is provided with an elastic hook, and the elastic hook cooperates with the card slot.

[11] A retractable conductor is further disposed between the cover plate and the staple, and the elastic pressing piece is electrically connected to the cover plate by a staple and a retractable conductor.

[12] There are multiple poles.

[13] A battery assembly method comprising the following steps:

[14] a)

The insulating spacer is placed at the end of the cell in the battery case, and the tab of the end of the cell is passed through the aperture in the insulating spacer and protrudes to the upper surface of the insulating spacer;

[15] b)

Extending the portion of the tab extending from the upper surface of the insulating spacer to the insulating spacer, fixing the elastic conductive crucible on the upper surface of the insulating spacer, and pressing the elastic conductive crucible to press the tab;

[16] c) Press the battery cover against the upper surface of the flexible conductive bead and seal the perimeter of the battery cover to the battery case.

Beneficial effect

[17] The beneficial effects of the invention are: 1. Using an insulating barrier and an elastic conductive crucible, the tab is connected to the elastic conductive crucible and the cover by a pressing force, and the tab and the elastic conductive crucible are formed by a simple assembly method. The cover is electrically connected without soldering, thereby eliminating the influence of the splash of metal particles on the performance and safety of the battery during the welding process, and improving the assembly efficiency; the insulating barrier can effectively prevent the connected metal conductor and the casing or A short circuit caused by contact between the plates.

[18] 2. Assembled, the elastic conductive sheet is pressed on the insulating spacer by elastic pressing piece to ensure the ear and elastic guide. The reliable connection between the electric cymbals increases the contact area between the tabs and the elastic conductive cymbals, and overcomes the problem of excessive internal resistance of the battery caused by poor soldering in the existing soldering process.

[19] 3. Assembling 吋 Fix the elastic pressing piece and the elastic conductive cymbal on the insulating spacer with the staples, resist the deformation of the elastic pressing piece, strengthen the connection, and eliminate the contact failure caused by the deformation of the elastic pressing piece.

DRAWINGS

Figure 1 is a structural view of a specific embodiment of the present invention;

2 is an exploded view of a specific embodiment of the present invention;

[22] Figure 3 is a structural view of the insulating barrier of Figure 1;

[23] Figure 4 is a left side view of Figure 3;

[24] Figure 5 is a structural view of another insulating barrier;

[25] Figure 6 is a structural view of the staple of Figure 1;

[26] Figure 7 is a structural view of the elastic pressing piece of Figure 1;

[27] Figure 8 is a structural view of another elastic pressing piece;

9 to 9-8 are exploded views of the assembly process of the embodiment of the present invention.

Embodiments of the invention

As shown in FIG. 1 to FIG. 3, the battery of the embodiment includes a cover plate 1, a retractable conductor 2, a staple 3, an elastic pressing piece 4, an elastic conductive crucible 5, an insulating spacer 6, a battery core 8, and a battery. Housing 9. The end of the battery cell 8 has a tab 7 extending from the positive and negative ears, and the positive and negative ears are respectively located at the two ends of the battery 8.

[30] The overall shape of the battery core 8 is cylindrical and is housed in a circular outer casing 9. Of course, the shape of the cell and the casing can also be designed into other shapes as required.

[31] The outer peripheral wall of the insulating spacer 6 is shaped to fit the inner cavity of the battery case 9, and the bottom surface thereof is placed on the end face of the battery cell 8. The insulating spacer 6 is provided with an aperture 601 which allows the tab 7 of the cell to pass therethrough and extend from the bottom surface to the other side.

[32] The insulating spacer 6 is superposed with an elastic conductive cymbal 5, and the elastic conductive cymbal 5 is superposed on the elastic conductive cymbal 5. A mounting step 602 is disposed on the inner side wall of the outer edge of the insulating spacer 6, and the outer edges of the elastic conductive cymbal 5 and the elastic pressing piece 4 are locked in the mounting step 602 for fast assembly of the tabs and ensuring the electrical conductor Reliable contact. As shown in FIG. 4, the mounting step 602 is a plurality of mounting buckles distributed on the inner side wall of the insulating spacer 6; as shown in FIG. 5, the mounting step 602 is an annular mounting groove formed on the inner side wall of the insulating spacer 6. . As shown in FIG. 6, one end of the staple 3 has a pressing surface 301, and the elastic pressing piece 4 is pressed against the elastic conductive crucible 5 by the pressing surface 301, and the other end of the staple 3 has a card slot 302. A resilient hook 603 (shown in FIG. 3) is disposed on the insulating spacer 6 at a position corresponding to the slot 302. The slot 302 cooperates with the elastic hook 603 to cooperate with the pressing surface 301 to elastically compress the sheet. 4 is pressed against the elastic conductive crucible 5 for resisting deformation of the elastic conducting voltage sheet 4 to strengthen the connection. The elastic conductive crucible 5 can press the tab 7 to make full contact, and on the other hand, it can connect the connecting lug 7 and the elastic pressing piece 4, and the elastic pressing piece 4 is stuck inside the outer edge of the insulating spacer 6 The mounting step 602 is fixed and applies a pre-stress to the filled elastic conductive crucible 5.

[34] The structure of the elastic pressing piece 4 is as shown in Fig. 7, and its center hole 41 passes through the staple 3.

[35] The structure of the other elastic pressing piece 4 is as shown in FIG. 8, which is provided with a notch 401 communicating with the central hole 41, and mounting holes 402 are formed on both sides of the notch, when the staple 3 is inserted into the center hole. That is, the tool can be inserted into the mounting hole 402 to open the notch 401, thereby expanding the center hole, facilitating the jam 3 to be caught.

[36] The retractable conductor 2 is connected between the positive and negative lead posts on the clip 3 and the cover plate 1, or between the positive and negative lead posts on the elastic pressing piece 4 and the cover plate 1 to realize the tab 7 Electrically connected to the cover plate 1.

[37] As shown in Figures 9-1 to 9-8, the assembly process of the above battery is:

1) Insulation barriers 6. The insulating spacer 6 is placed at the end of the battery cell 8, and the tab 7 is passed through the hole 601 of the insulating spacer and protrudes to the upper surface of the insulating spacer 6.

2) Press the tab 7 and fill the elastic conductive 圏 5. The portion of the tab 7 extending beyond the upper surface of the insulating spacer 6 is bent, and the elastic conductive cymbal 5 is filled thereon to electrically connect the tab 7 to the elastic conductive cymbal 5.

3) Card elastic tablet 4. The elastic pressing piece 4 is pressed into the insulating spacer 6 and placed on the upper surface of the elastic conductive cymbal 5, and is inserted into the mounting step 602 of the insulating spacer 6 to realize electrical connection between the elastic conductive cymbal 5 and the elastic pressing piece 4, and The elastic conductive crucible 5 is pressed against the upper surface of the insulating spacer 6.

4) Insert the staples 3. The card slot 302 at the lower end of the staple 3 is engaged with the elastic hook 603, and the upper pressing surface 301 presses the elastic pressing piece 4. The cover plate 1 and the staples 3 are connected by the retractable conductor 2 or the cover plate 1 and the elastic pressing piece 4 are connected by the retractable conductor 2, and the electrical connection between the tab 7 and the cover 1 is finally achieved.

[42] 5) The battery case 9 is sealed to the periphery of the cover 1.

[43] The above staples 3, elastic compression 4, elastic conductive 圏 5, insulating barrier 6 and tab 7 are contact connections

Through the contact pressure between the parts, the contact is tight and no welding is required.

[44] The above is a further detailed description of the present invention in connection with a specific preferred embodiment, and cannot be recognized. The specific implementation of the invention is limited only to these descriptions. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

Claim

[1] A battery, comprising: a battery core (8), a cover plate (1) and a casing (9), the end of the battery core (8) projecting with a tab (7), The end of the battery cell (8) is provided with an insulating spacer (6) and an elastic conductive crucible (5) placed on the insulating spacer (6), the tab (7) passing through the insulating spacer (6) The upper aperture (601) is then electrically connected to the elastic conductive crucible ( ₅ ), and the elastic conductive crucible (5) is electrically connected to the cover plate (1).

[2] The battery according to claim 1, wherein: the elastic conductive crucible (5) and the cover

The electrical connection of (1) is a contact type electrical connection.

[3] The battery according to claim 1 or 2, further comprising: an elastic pressing piece (4), the elastic pressing piece (4) pressing the elastic conductive cymbal (5), the elastic conductive cymbal (5) Electrically connected to the cover plate (1) by the elastic pressing piece (4).

[4] The battery according to claim 3, wherein: the insulating spacer (6) is provided with a mounting step (602), the elastic conductive cymbal (5) and the elastic pressing piece (4) The edge is secured in the mounting step (602).

[5] The battery according to claim 4, wherein the mounting step (602) is a plurality of mounting clips disposed on an inner wall of the insulating spacer (6).

[6] The battery according to claim 4, wherein the mounting step (602) is an annular mounting groove provided in an inner wall of the insulating spacer (6).

[7] The battery according to claim 4, further comprising: a staple (3), one end of the staple (3) is provided with a pressing surface (301), and the pressing surface is passed through (301) pressing the elastic pressing piece (4) on the elastic conductive cymbal (5), the other end of the staple (3) is provided with a card slot (302), and the insulating spacer (6) is provided The elastic hook (603) is matched with the card slot (302).

[8] The battery according to claim 7, wherein: the cover plate (1) and the staple (3) are further provided with a retractable conductor (2), and the elastic pressing piece (4) passes the card The nail (3) and the retractable conductor (2) are electrically connected to the cover (1).

[9] The battery according to claim 1 or 2, wherein the plurality of tabs (7) are plural.

[10] A battery assembly method, comprising: the following steps: a) placing the insulating barrier at the end of the cell in the battery casing, passing the tab of the end of the cell through the aperture in the insulating spacer and extending to the upper surface of the insulating barrier;

b) pressing the portion of the tab extending from the upper surface of the insulating spacer to the insulating spacer, fixing the elastic conductive crucible on the upper surface of the insulating spacer, and pressing the elastic conductive crucible to press the tab;

c) Press the battery cover against the upper surface of the elastic conductive bead and seal the periphery of the battery cover to the battery case.

[11] The battery assembly method according to claim 10, wherein: the step c) is implemented by the following steps:

Cl) placing an elastic pressing piece on the upper surface of the elastic conductive crucible;

C2) locking the elastic pressing piece and the elastic conductive cymbal on the insulating spacer with a staple so that the elastic conductive cymbal is pressed against the upper surface of the insulating spacer;

C3) Connect the battery cover to the staples and seal the battery cover around the battery cover.

[12] The battery assembly method according to claim 11, wherein in the step cl), the edges of the elastic conductive crucible and the elastic pressing sheet are also stuck in the mounting step of the insulating spacer.

[13] The battery assembly method according to claim 11, wherein the step c3) is: connecting the battery cover to the elastic pressing piece, and sealing the periphery of the battery cover to the battery case.

[14] The battery assembly method according to claim 11, wherein: in the step c3), the battery cover and the staple are connected by a retractable electric conductor.