CN101877415B

CN101877415B - Battery

Info

Publication number: CN101877415B
Application number: CN2009101362263A
Authority: CN
Inventors: 杨绍理; 张中林
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2009-04-29
Filing date: 2009-04-29
Publication date: 2012-12-19
Anticipated expiration: 2029-04-29
Also published as: CN101877415A

Abstract

The invention discloses a battery, comprising a battery cell (1) and a connection structure (2) connected with the battery cell (1), wherein the battery cell (1) is provided with a first electrode and a second electrode; the connection structure (2) comprises a connector (3) and a protective circuit board (4) fixedly connected with the connector (3); the protective circuit board (4) is provided with a first electrode end (9) and a second electrode end which are respectively connected with the first electrode and the second electrode electrically; the protective circuit board (4) is also provided with a through hole (10) and a conductor enclosing the through hole (10); the conductor part is electrically connected with the first electrode end (9) and the first electrode of the battery cell (1) by a fastener; and the fastener passes through the through hole (10). The battery provided by the invention can ensure connection between the battery cell and the connection structure to be simpler, more convenient and more reliable.

Description

A kind of battery

Technical field

The present invention relates to field of batteries, more particularly, relate to a kind of battery, like lithium rechargeable battery.

Background technology

In recent years; Fast development along with electronic terminal product; Like mobile phone, notebook computer, electric tool etc.; Battery to as power supply has proposed new requirement in all fields, for example, requires that battery structure is more compact, assembling is more simple, performance is more reliable and have bigger capacity etc.

As shown in Figure 1, battery comprise electric core 1 and with this electricity core 1 connection structure connecting 2, this syndeton 2 comprises connector 3 and the protection circuit plate 4 that is arranged in the connector 3.But the defective that conventional battery usually occurs is unreliable for being electrically connected, thereby causes the battery cisco unity malfunction and scrap.Therefore, the conventional battery reliability is not high.

Summary of the invention

The objective of the invention is to overcome the not high defective of reliability in the conventional battery, and provide a kind of reliability higher battery.

According to an aspect of the present invention, a kind of battery is provided, this battery comprise electric core and with this electricity core connection structure connecting; Said electric core has first electrode and second electrode; Said syndeton comprises connector and the protection circuit plate that is fixedly connected with this connector, and this protection circuit plate has respectively first electrode tip and second electrode tip that is connected with second electrode electricity with said first electrode, wherein; The pieces that said protection circuit plate also has through hole and is provided with around said through hole; This pieces is electrically connected with said first electrode tip, and said pieces is connected with first electrode electricity of said electric core through securing member, and said securing member passes said through hole.

The present inventor finds, in traditional battery, all realizes being electrically connected between protection circuit plate and the electric core through welding (like spot welding), and usually be that defective because of the welding position causes and cause battery to be electrically connected insecure reason.Therefore, not high and cause battery to be electrically connected insecure problem in order to overcome welding quality, in battery provided by the present invention, first electrode tip of said protection circuit plate is connected with first electrode electricity of said electric core with securing member through pieces.Thereby, through utilizing the connected mode of securing member, need not the welding operation between first electrode tip of first electrode and protection circuit plate of electric core, be connected insecure defective thereby can overcome in the conventional batteries between the electric core and syndeton.

Description of drawings

Fig. 1 is the decomposing schematic representation of conventional battery;

Fig. 2 is the sketch map according to a kind of execution mode of battery of the present invention;

The sketch map of Fig. 3 for being connected between the electric core of battery among Fig. 2 and the protection circuit plate;

Fig. 4 is the enlarged diagram of contact among Fig. 2;

Fig. 5 is the sketch map according to the another kind of execution mode of battery of the present invention;

The sketch map of Fig. 6 for being connected between the electric core of battery among Fig. 5 and the protection circuit plate;

Fig. 7 is for being arranged on the sketch map of first electrode tip of protection circuit plate among Fig. 5.

Embodiment

Carry out detailed description below in conjunction with the accompanying drawing specific embodiments of the invention.

Battery according to the embodiment of the present invention relates generally to the connected mode between electric core and the syndeton (being specially protection circuit plate 4) with respect to the improvements of prior art, can be similar or identical with existing various secondary cells (like lithium rechargeable battery) for other structure of battery.Therefore,, in the application's specification, emphatically the annexation of electric core and syndeton is described, and other contents that belong to prior art are carried out brief description or omitted for for simplicity.

Extremely shown in Figure 7 like Fig. 2; Battery according to the embodiment of the present invention comprise electric core 1 and with this electricity core 1 connection structure connecting 2; Said electric core 1 has first electrode and second electrode; Said syndeton 2 comprises connector 3 and the protection circuit plate 4 that is fixedly connected with this connector 3, and this protection circuit plate 4 has respectively first electrode tip 9 and second electrode tip that is connected with second electrode electricity with said first electrode, wherein; The pieces that said protection circuit plate 4 also has through hole 10 and is provided with around said through hole 10; This pieces is electrically connected with said first electrode tip 9, and said pieces is connected with first electrode electricity of said electric core 1 through securing member, and said securing member passes said through hole 10.

In traditional battery; As shown in Figure 1; Utilize first connecting band 7 and second connecting band 5 respectively; Realizing that through welding (spot welding) () is connected between first electrode tip 9 of first electrode and the protection circuit plate 4 of electricity core 1, also is to realize that through welding () is connected between second electrode of electric core 1 and second electrode tip of protection circuit plate 4.

Yet in battery provided by the present invention, the pieces that is connected with first electrode tip 9 is provided with around through hole 10, and this pieces is connected with first electrode of electric core 1 through securing member, and this securing member passes through hole 10.Thereby, need not desired traditionally first electrode tip and first electrode of electric core 1 through being welded to connect protection circuit plate 4.Like this, utilize this securing member to make things convenient for and reliably first electrode tip 9 of protection circuit plate 4 is connected in first electrode of electric core 1, realize being connected of protection circuit plate 4 and electric core 1.

Under the prerequisite that satisfies the application scenario requirement, connector 3 can be existing any connector and protection circuit plate with protection circuit plate 4.The housing that connector 3 is normally processed by insulating material, protection circuit plate 4 is fixedly connected on connector 3, thereby makes protection circuit plate 4 and connector 3 form an integral body (being syndeton 2), and is connected on the electric core 1, to accomplish the assembling of battery.

Protection circuit plate 4 has first electrode tip 9 and second electrode tip (unmarked) that is electrically connected with first electrode (like positive pole) and second electrode (like negative pole) of electric core 1 respectively; The part of this first electrode tip 9 and second electrode tip is positioned at protection circuit plate 4 on the surface of connector 3 (like Fig. 3 and shown in Figure 6); Thereby form a plurality of terminals; As 11,21,22,15,26 or 27; Wherein under normal conditions, terminal (contact) 11 or (contact) 15 are for belonging to first electrode tip 9 (as as positive terminal), and

terminal

21 or 26 belongs to second electrode tip (as can be used as negative terminal);

Other terminal

22 or 27 can be used to detect the signal of this battery, for example can confirm whether this battery is applicable to power consumption equipment (like mobile phone).Certainly, be not limited to this, can change to some extent according to practical application, for well known to those of ordinary skill in the art about the setting of these terminals.

As shown in Figure 2.In the time will assembling the battery of accomplishing and be used for the workplace (for example; Battery is installed in the mobile phone to supply power to mobile phone); The electrical contact of this power consumption equipment (does not show; Like the electrical contact that is used in the mobile phone being electrically connected with battery) can pass the opening 20 of connector 3 and be electrically connected with first electrode tip and second electrode tip of protection circuit plate 4, be pressed in first electrode tip of protection circuit plate 4 and the above-mentioned terminal of second electrode tip through electrical contact usually.Like this; First electrode tip of protection circuit plate 4 is connected with second electrode electricity with first electrode of electric core 1 respectively with the said terminal of second electrode tip (comprising positive terminal and negative terminal); Thereby can the electrical contact of electric core 1 with power consumption equipment (like mobile phone) be electrically connected through this protection circuit plate 4, to supply power to this power consumption equipment.

According to one embodiment of the present invention; Extremely shown in Figure 4 like Fig. 2; First electrode tip 9 is the contact 11 that is fixedly installed on the protection circuit plate 4 and protrudes in this protection circuit plate 4; This contact 11 has contact body 12 and the footing 13 that is fixedly connected with this contact body 12, and this footing 13 inserts in the protection circuit plate 4 securely.

In this embodiment, first electrode tip 9 of protection circuit plate 4 is for protruding in the contact 11 of protection circuit plate 4.After the assembling of accomplishing battery, this contact 11 is positioned at the space that protection circuit plate 4 and connector 3 are sealed, and the opening 20 that on connector 3, is provided with, thereby allows the electrical contact of power consumption equipment to pass the opening 20 of connector 3 and engage with this contact 11.

For this contact 11 is installed securely, preferably, contact 11 has contact body 12 and the footing 13 that is fixedly connected with this contact body 12, and through this footing 13 being inserted securely the firm installation that realizes this contact 11 in the protection circuit plate 4.In addition, for the ease of with the engaging of the electrical contact of power consumption equipment, preferably as shown in Figure 4, the contact body 12 of contact 11 has the open chamber 29 of the electrical contact of admitting power consumption equipment, and the electrical contact of contact 11 and power consumption equipment is snapped together.

According to another embodiment of the invention, like Fig. 6 and shown in Figure 7, first electrode tip 9 is for being arranged on the lip-deep contact 15 of protection circuit plate 4.In this embodiment; The electrical contact of power consumption equipment is pressed on the contact 15 of protection circuit plate 4 after passing the opening 20 of connector 3 usually; Thereby omitted the manufacturing of contact 11; To realize the reduction of cost, the electrical contact of while power consumption equipment is also very nearly the same with the mode that is electrically connected effect and contact 11 between the contact 15 of protection circuit plate 4.

Securing member passes the through hole 10 of protection circuit plate 4 and inserts in the hole 24 of electric core 1, to be connected with first electrode electricity of electric core 1.In addition, because the pieces that is connected with first electrode tip 9 is around through hole 10 settings, thereby when securing member passes through hole 10, can directly contact with pieces, thereby realize being electrically connected of this pieces and securing member.Like this, utilize being electrically connected between first electrode tip 9 of first electrode that securing member realized electric core 1 and protection circuit plate 4.This connected mode is compared with utilizing the method for welding traditionally, and obvious operation is more easy and connect more reliable.Preferably, the opening part in the hole 24 of connector 3 is sealed by insulating material (like fluid sealant), thereby can prevent that securing member is because of being exposed to the electric leakage that the outside possibly cause.

Securing member is processed by the metal material as conductor, and like steel, iron, nickel etc., this securing member can be multiple existing form, like pin, rivet or screw etc., as long as can realize the above-mentioned fastening effect and the electrical connection effect of securing member.

According to one embodiment of the present invention; Securing member can be contained in the connector 3 fully; Promptly do not stretch out in outside the housing of connector 3, so the effect that this securing member played is to pass the through hole 10 of protection circuit plate (insulated part) and insert in the electric core 1 (like, the hole 24 of inserting electric core 1); This securing member can play the effect of electrical connection, can also play the effect of firm protection circuit plate 4.In this embodiment, connector 3 can be fixed on the electric core 1 in several ways, for example through bonding, perhaps through trip bolt connector 3 is fixed in electric core 1.

According to another embodiment of the invention, securing member is not to be positioned at connector 3 fully, is anchored on electric core 1 but pass connector 3 successively from the outside with protection circuit plate 4.As shown in Figure 2, securing member (like screw 16) passes the hole 23 of connector 3 and the through hole 10 of protection circuit plate 4 successively from the outside.Thereby this securing member can also realize connector 3 is anchored on the effect of electric core 1 except that the effect with electrical connection, thereby has the advantage of compact conformation.

According to one embodiment of the present invention, securing member is a screw 16, like Fig. 2 and shown in Figure 5, utilizes the external screw thread of this screw 16 to help realizing reliable connection the between this screw 16 and the pieces.

Pieces realizes being electrically connected between first electrode tip 9 (like contact 11 or contact 15) of securing member (like screw 16) and protection circuit plate 4, and this pieces is processed by conductor material, like any suitable material that is used as conductor such as copper, iron or nickel.This pieces can be various ways, on the basis of through hole 10, to realize exceeding with being connected of securing member.

According to one embodiment of the present invention; Extremely shown in Figure 4 like Fig. 2; Pieces is the ring-shaped article 17 that is arranged on the surface of protection circuit plate 4 and extends around the opening of through hole 10, and this ring-shaped article 17 connects first electrode tip 9 and the securing member that passes the through hole 10 of protection circuit plate 4 of protection circuit plates 4.

This ring-shaped article 17 is fitted on the surface of protection circuit plate 4; And the opening that centers on through hole 10 extends; Thereby the endoporus 19 of this ring-shaped article 17 and the through hole 10 of protection circuit plate 4 are coincided; So that securing member (like screw 16) through this ring-shaped article 17 endoporus 19 and be electrically connected with this ring-shaped article 17, as shown in Figure 3.

Ring-shaped article 17 can be electrically connected with first electrode tip 9 of protection circuit plate 4 in several ways, and for example ring-shaped article 17 can be made as the part (as shown in Figure 4, ring-shaped article 17 links together through connecting portion and contact 11) of contact 11; Perhaps also can ring-shaped article 17 be made as the part of conducting wire in the protection circuit plate 4, after installing contact 11,17 spot welding are connected with ring-shaped article with contact 11.

Satisfying under ring-shaped article 17 and the prerequisite that first electrode tip 9 is electrically connected; This ring-shaped article 17 can be arranged in protection circuit plate 4 (like situation of Fig. 3) on the surface of connector 3; Also can be arranged on towards protection circuit plate 4 on the surface of electric core 1, can select according to concrete application scenario.

For the ease of being connected of screw 16 and ring-shaped article 17, preferably, has the internal thread that cooperates with the external screw thread of screw 16 on the circumferential surface of the endoporus 19 of ring-shaped article 17.

According to one embodiment of the present invention, pieces is the sleeve member 18 that is arranged on the inner surface of through hole 10, like Fig. 5 to shown in Figure 7.This sleeve member 18 is provided with around through hole 10, specifically, is arranged on the inner circumferential surface of this through hole 10 around through hole 10.

This sleeve member 18 is electrically connected (like the contact among Fig. 6 and Fig. 7 15) with first electrode tip 9 of protection circuit plate 4; For example; Can be embedded in the lead 28 in the protection circuit plate 4 through what metal (being generally copper) processed, this lead 28 can form when making protection circuit plate 4 simultaneously.

For the ease of realizing as reliable connection the between the sleeve member 18 of pieces and the screw that passes through hole 10 16; Preferably; Has the internal thread that cooperates with the external screw thread of screw 16 on the inner circumferential surface of sleeve member 18, so that have reliable the electrical connection and mechanical connection between screw 16 and the sleeve member 18.

According to another kind of execution mode, the inner circumferential surface of sleeve member 18 is smooth periphery, and the hardness of the material of screw 16 is greater than the hardness of the material of sleeve member 18.Thereby, when screw 16 process sleeve members 18, can produce the effect of similar tapping technology, that is to say that screw 16 can depict the internal thread that cooperates with the external screw thread of this screw 16 on the inner circumferential surface of sleeve member 18.Therefore, between screw 16 and sleeve member 18, can form more reliable fastening annexation.

More than combine accompanying drawing that battery of the present invention has been carried out detailed description.Below in conjunction with accompanying drawing the assembling process of the battery of one embodiment of the present invention is described, understood so that those of ordinary skills have more clearly the present invention, this assembling process is described below:

Second connecting band 5 and fuse 6 are connected in second electrode (like negative pole) of electric core 1;

Protection circuit plate 4 and connector 3 are assembled together;

The syndeton 2 that will comprise protection circuit plate 4 and connector 3 is arranged on the electric core 1; And second connecting band 5 is connected (as through electric welding) with second link of protection circuit plate 4; Being electrically connected of second electrode tip (like the negative pole end) thereby of second electrode of realizing electric core 1 and protection circuit plate 4; And make securing member pass connector 3 to be anchored on electric core 1, thereby being connected of first electrode tip of first electrode of realizing electric core 1 and protection circuit plate 4 with protection circuit plate 4; And

Can also be provided with in addition and play the screw of fastening effect, thereby guarantee that syndeton 2 is fixed in electric core 1.

The assembly method of battery of the present invention is not limited thereto, and on through the above basis that the structure of battery of the present invention is fully described, those of ordinary skills can make suitable change and/or replacement etc. to said assembly method.

In addition, can also the plastic cement bottom be pasted on the end face that electrode is not set of electric core 1,, with labeling power brick wrapped at last, thereby accomplish the final assembling of accomplishing battery product to play a protective role.But for the mode of bottom and labeling and applying thereof, all be known in those skilled in the art, repeat no more at this.

As shown in Figure 5, under preferred situation, be provided with liner 26 (like foam-rubber cushion) between protection circuit plate 4 and the electric core 1, this liner 26 is processed by the rubber-like material.This liner 26 can play the effect of support to protection circuit plate 4, thereby helps preventing that the defective of distortion from appearring in protection circuit plate 4.This technical characterictic is applicable to above-mentioned all execution modes.

Battery for some type; Because the positive pole zone 8 of electric core 1 occupies the major part of electric core 1 end surface; Thereby; It is more convenient to utilize securing member to connect the positive terminal of positive pole and protection circuit plate 4 of electric core 1, therefore first electrode of technical scheme provided by the present invention and positive pole that first electrode tip refers to electric core respectively and the positive terminal of protection circuit plate in the foregoing description.But in dissimilar batteries, first electrode and first electrode tip also can refer to the negative pole of electric core and the negative pole end of protection circuit plate respectively.

Though above-mentioned literal specific embodiments of the invention is described; But those of ordinary skill in the art should be understood that; The content that the present invention comprised is not limited thereto, and under the prerequisite that does not break away from essential scope of the present invention, can make various modifications, replacement and variation.

Claims

1. battery; This battery comprise electric core (1) and with this electricity core (1) connection structure connecting (2); Said electric core (1) has first electrode and second electrode; Said syndeton (2) comprises connector (3) and the protection circuit plate (4) that is fixedly connected with this connector (3), and this protection circuit plate (4) has respectively first electrode tip (9) and second electrode tip that is connected with second electrode electricity with said first electrode, wherein; Said first electrode tip (9) be can with the electrical contact electrodes in contact end of power consumption equipment; The pieces that said protection circuit plate (4) also has through hole (10) and is provided with around said through hole (10), this pieces is electrically connected with said first electrode tip (9), and said pieces is connected with first electrode electricity of said electric core (1) through securing member; Said securing member passes said through hole (10), and said securing member is a conductor.

2. battery according to claim 1; Wherein, Said first electrode tip (9) is the contact (11) that is fixedly installed on the said protection circuit plate (4) and protrudes in this protection circuit plate (4); This contact (11) has contact body (12) and the footing (13) that is fixedly connected with this contact body (12), and this footing (13) is fixing to be inserted in the said protection circuit plate (4).

3. battery according to claim 1, wherein, said first electrode tip (9) is for being arranged on the lip-deep contact (15) of said protection circuit plate (4).

4. battery according to claim 1, wherein, said securing member passes said connector (3) and protection circuit plate (4) successively and is anchored on said electric core (1) from the outside.

5. battery according to claim 4, wherein, said securing member is screw (16).

6. battery according to claim 5, wherein, the ring-shaped article (17) of said pieces for being arranged on the surface of said protection circuit plate (4) and extending around the opening of said through hole (10).

7. battery according to claim 6 wherein, has the internal thread that cooperates with the external screw thread of said screw (16) on the inner circumferential surface of said ring-shaped article (17).

8. battery according to claim 5, wherein, said pieces is the sleeve member (18) on the inner surface that is arranged on said through hole (10).

9. battery according to claim 8 wherein, has the internal thread that cooperates with the external screw thread of said screw (16) on the inner circumferential surface of said sleeve member (18).

10. battery according to claim 8, wherein, the inner circumferential surface of said sleeve member (18) is smooth periphery, the hardness of the material of said screw (16) is greater than the hardness of the material of said sleeve member (18).