CN101877416B

CN101877416B - Battery

Info

Publication number: CN101877416B
Application number: CN200910136227A
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: 2012-10-17
Anticipated expiration: 2029-04-29
Also published as: CN101877416A

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 (10) and a second electrode end which are respectively connected with the first electrode and the second electrode electrically; the first electrode end is electrically connected with the first electrode of the battery cell (1) by a connecting piece (9); and one end of the connecting piece (9) is electrically connected with the first electrode end (10) of the protective circuit board (4) and the other end thereof compresses the first electrode of the battery cell (1) tightly. 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 conventional battery reliability, and a kind of higher battery of reliability that connects is provided.

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; This protection circuit plate has respectively first electrode tip and second electrode tip that is connected with second electrode electricity with said first electrode, and wherein, said first electrode tip is connected with first electrode electricity of said electric core through connector; One end of this connector is electrically connected with first electrode tip of said protection circuit plate, and the other end is pressed in first electrode of said electric core.

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 reason that battery can not reliably working.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, also be provided with connector; One end of this connector is electrically connected with first electrode tip of said protection circuit plate, and the other end is pressed in first electrode of said electric core.Thereby, need not connector to be connected with first electrode electricity of electric core through welding, 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 sketch map 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;

Fig. 6 is the sketch map of the connector that is connected with the contact of protection circuit plate among Fig. 5.

Embodiment

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

According to the embodiment of the present invention; A kind of battery is provided; Battery wherein provided by 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; For other structure of battery can with existing various secondary cells etc., identical like lithium rechargeable 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 6 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, and 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 10 and second electrode tip that is connected with second electrode electricity with said first electrode; Wherein, Said first electrode tip is connected with first electrode electricity of said electric core 1 through connector 9, and an end of this connector 9 is electrically connected with first electrode tip 10 of said protection circuit plate 4, and the other end is pressed in first electrode of said electric core 1.

As shown in Figure 1; In traditional battery; Utilize first connecting band 7 (like the first electrode connecting band) and second connecting band 5 (like the negative pole connecting band) respectively; Realizing that through welding (spot welding) () is connected between first electrode tip 10 (like first electrode tip) of first electrode (like first electrode) and the protection circuit plate 4 of electricity core 1, also is to realize that through welding () is connected between second electrode (like negative pole) of electric core 1 and second electrode tip (like negative pole end) of protection circuit plate 4.

Yet; In battery provided by the present invention; Syndeton 2 has the connector that extends to first electrode of electric core 1 from first electrode tip 10 of protection circuit plate 4, and an end of this connector is electrically connected with first electrode tip of protection circuit plate 4, and the other end is pressed on first electrode of electric core 1.After the assembling of accomplishing protection circuit plate 4 and electric core 1, this connector can be realized the electrical connection between first electrode tip 10 and first electrode naturally, and need not traditional welding operation.Therefore, in terms of existing technologies, have between comparatively easy and first electrode tip 10 of assembly manipulation and first electrode and be electrically connected advantage comparatively reliably.

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 respectively first electrode tip 10 and the negative pole end (unmarked) that is connected with negative electricity with first electrode of electric core 1; The part of this first electrode tip 10 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; Contact 11,22 and 23 as shown in Figure 3, and the contact shown in Fig. 6 15,22 and 23, wherein under normal conditions; Terminal (contact) 11 or (contact) 15 belong to first electrode tip 10 (as as positive terminal); Terminal 23 belongs to second electrode tip (as as negative terminal), and other terminal 22 can be the signal that is used to detect 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 25 of connector 3 and be electrically connected with the electrode tip (comprising 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, can the electrical contact of electric core 1 with power consumption equipment (like mobile phone) be electrically connected, to supply power to this power consumption equipment through this protection circuit plate 4.

According to one embodiment of the present invention; To shown in Figure 4, first electrode tip 10 is for being fixedly installed on the protection circuit plate 4 and protruding in the contact 11 of this protection circuit plate 4 (as shown in Figure 3, this contact 11 extends along opposite direction from protection circuit plate 4 respectively with connector 9 like Fig. 2; Contact 11 is towards connector 3; And connector 9 is towards electric core 1), 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 10 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 25 that on connector 3, is provided with, thereby allows the electrical contact of power consumption equipment to pass the opening 25 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.

Like Fig. 3 and shown in Figure 4, an end of connector 9 is electrically connected with the footing 13 of contact 11, and extends to electric core 1 from the end of this footing 13.Specifically; The footing 13 of contact 11 inserts in the protection circuit plate 4, and an end of connector 9 is connected with footing 13, perhaps can be regarded as the extension of footing 13; And the other end of connector 9 extends to electric core 1 from protection circuit plate 4, on first electrode that is pressed in this electricity core 1.

Connector 9 can be independent of contact 11 to be made, and when assemble, can connector 9 be connected in contact 11; Perhaps, preferably, connector 9 forms with footing 13 integral body of contact 11, thereby reduces number of parts, is convenient to the assembling of battery, to reduce cost.

According to another embodiment of the invention, like Fig. 5 and shown in Figure 6, first electrode tip 10 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 25 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.

Like Fig. 5 and shown in Figure 6, a said end of connector 9 is electrically connected with the contact 15 of protection circuit plate 4, and stretches out in protection circuit plate 4 and extend towards electric core 1, to be connected with first electrode electricity of this electricity core 1.The main distinction part of this execution mode and execution mode shown in Figure 3 is that first electrode tip 10 of protection circuit plate 4 has different forms.

One end of connector 9 is electrically connected with first electrode tip 10 of protection circuit plate 4; And the other end stretches out in protection circuit plate 4 and extend towards electric core 1; Thereby be pressed on first electrode of electric core 1, with being electrically connected between first electrode tip 10 that utilizes first electrode that this connector 9 realizes electric core 1 and protection circuit plate 4.

Connector 9 is processed by the metal material as conductor, like steel, iron, nickel etc., as long as can realize the electrical connection effect.

Owing to the said other end of connector 9 is realized being electrically connected with tight contact of first electrode of electric core 1; Thereby first electrode tip of connector 9 and protection circuit plate 4 contact the effect (compressing) that is under pressure; Contact the effect (compressing) that also is under pressure between first electrode of connector 9 and electric core 1, thereby make connector 9 more reliable, tight with being electrically connected of electric core 1 and protection circuit plate 4.

Connector 9 can be multiple shape and structure, as long as can realize its electrical connection effect and be pressed between electric core 1 and the protection circuit plate 4.According to one embodiment of the present invention; Like Fig. 4 and shown in Figure 6; Connector 9 is a conductor rods 16, and this conductor rods 16 is at least one (be preferably a plurality of, to obtain reliable electrical connection); One end of conductor rods 16 is electrically connected with first electrode tip of protection circuit plate 4, and the other end 17 is pressed on first electrode of said electric core 1.

In this embodiment, the conductor rods 16 of connector 9 for processing by conductor, this conductor rods 16 extends to electric core 1 from footing 13.In order to ensure reliable connection the between first electrode tip of first electrode of electric core 1 and protection circuit plate, be a plurality of as the conductor rods 16 of connector 9, be preferably 2.Thereby, if during the bad connection of some conductor rods 16, can also realize the electrical connection effects through additional conductors bar 16, thereby improve the reliability of battery.

Preferably, be connected comparatively smooth and easyly in order to make between conductor rods 16 and the electric core 1, the said other end 17 of conductor rods 16 has arcuate structure 18.Like this; Be being connected between first electrode of conductor rods 16 and electric core 1 to realize through contacting between the plane at this arcuate structure 18 and first electrode place of electric core 1; This arcuate structure 18 can not cause damage to this plane; And with the contacted contrast in plane and plane, always can guarantee to have reliable the connection between conductor rods 16 and the electric core 1.

Certainly, the contacted end of first electrode of conductor rods 16 and electric core 1 can also have the structure of other any appropriate, exceeds can realize the reliable effect that is electrically connected, and for example, in execution mode shown in Figure 6, conductor rods 16 is merely the capable rod-like element of cylinder.Preferably, conductor rods 16 elastic spring or the spring for being processed by metallic conductor can rely on the elasticity of this pieces 16 between conductor rods 16 and the electric core 1 and reliably be electrically connected thereby make.

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 (like the negative pole connecting band) and fuse 6 are connected in second electrode 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 electrode tip of protection circuit plate 4; Thereby being electrically connected of second electrode tip of second electrode of realizing electric core 1 and protection circuit plate 4; End owing to connector 9 is electrically connected with first electrode tip of protection circuit plate 4 simultaneously; And the other end is pressed on first electrode of electric core 1, thus being electrically connected between first electrode tip of first electrode of realizing electric core 1 and 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 (for example, screw 26 can pass the through hole 21 of connector 3, protection circuit plate 4 and be fixed in electric core 1, thereby realizes the assembling of syndeton and 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.

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, and 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 (10) and second electrode tip that is connected with second electrode electricity with said first electrode; Wherein

Said first electrode tip is connected with first electrode electricity of said electric core (1) through connector (9); One end of this connector (9) is electrically connected with first electrode tip (10) of said protection circuit plate (4), and the other end is pressed in first electrode of said electric core (1);

Said first electrode tip (10) 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);

A said end of said connector (9) is electrically connected with the footing (13) of said contact (11);

Said connector (9) forms with the footing (13) of said contact (11) is whole.

2. battery according to claim 1, wherein, said first electrode tip (10) is for being arranged on the lip-deep contact (15) of said protection circuit plate (4).

3. battery according to claim 2, wherein, an end of said connector (9) is electrically connected with said contact (15), and the other end of this connector (9) stretches out in said protection circuit plate (4) and is pressed in first electrode of said electric core (1).