CN2914349Y

CN2914349Y - Secondary battery

Info

Publication number: CN2914349Y
Application number: CNU200520121336XU
Authority: CN
Inventors: 刘卫平; 肖宏; 何昱臣
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2005-12-30
Filing date: 2005-12-30
Publication date: 2007-06-20
Anticipated expiration: 2015-12-30

Abstract

The utility model relates to a secondary battery. The secondary battery includes an electrode core consisting of a positive electrode, a separation membrane and a negative electrode; an insulating tape adhered on upper end surface and two opposite lateral surfaces of the electrode core; a gap arranged on the insulating tape at the position corresponding to upper end surface of the electrode core; and a first and a second pole ear respectively lead out from the electrode core. The first pole ear is lead out from upper surface of the electrode core, and isolated from the electrode core through the gap. The secondary battery has simple structure and good safety.

Description

A kind of secondary cell

Technical field

The utility model is about a kind of secondary cell, particularly a kind of simple in structure, secondary cell that security performance is excellent.

Background technology

Present flourish along with information technology, and to the improving constantly of environmental protection attention degree, people need the power source of little, in light weight, the safe and reliable power supply of energy height, volume as portable type electronic product and motor vehicle.Secondary cell has obtained huge development with its high-energy-density, high voltage, advantage such as volume is little, in light weight, fail safe is good over past ten years, become one of main energy sources of communication class electronic product.

Yet, just secondary cell obtain increasingly extensive universal in, people also have higher requirement to the fail safe of its use.Now, because the competition of mobile phone market is growing more intense, each mobile phone producer wish to mobile phone provide battery that the energy supports can various environments for use in, higher relatively fail safe is all arranged, so corresponding customer complaint and complaint will reduce even not have, thereby the brand of oneself is benefited in competition.Certainly, the more important thing is that as the designer of battery, we must take into full account user's safety from user's angle, if after all the user is caused personal injury, loss is irremediable.

Summary of the invention

At foregoing, the utility model purpose promptly is to provide a kind of simple in structure, secondary cell that security performance is excellent.

The purpose of this utility model is achieved through the following technical solutions:

A kind of secondary cell of the utility model comprises: the electrode core body is made of positive pole, barrier film and negative pole; Insulating tape, cover is affixed on the upper surface and the two relative side of electrode core body; Insulating tape is provided with hole seam, is positioned at the position, upper surface of comparative electrode core body; First and second lug is drawn from the electrode core body respectively, and first lug is drawn from the upper surface of electrode core body, and it is isolated with the electrode core body to pass the hole seam.

In a kind of secondary battery construction of the above, wherein:

Described second lug is drawn from the side of electrode core body, and described insulating tape makes second lug and electrode core body isolated.Wherein, the described electrode core body takeup type electrode core body that positive pole, barrier film and negative pole are reeled and formed of serving as reasons.

The position, upper surface of comparative electrode core body also is provided with second hole seam on the described insulating tape, and described second lug is drawn from the upper surface of electrode core body, and it is isolated with the electrode core body to pass second hole seam.Wherein, the described electrode core body takeup type electrode core body that positive pole, barrier film and negative pole are reeled and formed of serving as reasons; The described in other words electrode core body stacked successively stacked electrode core body that forms of positive pole, barrier film and negative pole of serving as reasons.

Described secondary cell also comprises:

Second insulating tape, cover is affixed on the lower surface and the two relative side of electrode core body;

Second insulating tape is provided with hole seam, is positioned at the position, lower surface of comparative electrode core body;

Second lug is drawn from the lower surface of electrode core body, and the hole seam that passes on second insulating tape is isolated with the electrode core body.Wherein, the described electrode core body stacked successively stacked electrode core body that forms of positive pole, barrier film and negative pole of serving as reasons.

Also be provided with the hole that is used for capillary electrolysis liquid on the described insulating tape.Wherein, the hole that is used for capillary electrolysis liquid on the described insulating tape is positioned at the position, upper surface of comparative electrode core body.

The described electrode core body takeup type electrode core body that positive pole, barrier film and negative pole are reeled and formed of serving as reasons.

The described electrode core body stacked successively stacked electrode core body that forms of positive pole, barrier film and negative pole of serving as reasons.

The adhesive plaster at a kind of secondary cell of the utility model and former battery top is compared, adopt adhesive plaster to hide the whole end face of letter battery, not only guaranteed on the basis of the pole piece contact in the lug discord battery of battery outer ring, and prevented the pole piece of battery inside again owing to rock or beat and mutual dislocation, and then be in contact with one another and cause short circuit, the pole piece that perhaps misplaces contacts with shell wall and causes short circuit; In addition, having prevented also that lug in the middle of the battery from contacting with the battery inner pole piece from the end face of battery causes short circuit; And the end that has also prevented battery contacts with battery cover board and causes short circuit.Therefore, the utility model is with respect to former battery battery core structure, and the fail safe of battery is had better guarantee.

Description of drawings

In order to be easy to explanation, the utility model is done to describe in detail by following preferred embodiment and accompanying drawing.

Fig. 1 is the schematic perspective view of the battery of a kind of secondary cell of the utility model.

Fig. 2 is the schematic diagram after the adhesive plaster of a kind of secondary cell of the utility model launches.

Fig. 3 is the schematic diagram of another kind of structure embodiment of the battery of a kind of secondary cell of the utility model.

Fig. 4 is the schematic diagram of another structure embodiment of the battery of a kind of secondary cell of the utility model.

Fig. 5 is the schematic perspective view of the battery of secondary cell in the prior art.

Embodiment

Please together referring to figs. 1 to Fig. 2, a kind of secondary cell of the utility model, mainly comprise by positive pole, the stacked successively battery 1 after the coiling operation is finished of barrier film and negative pole, lead to first lug 12 and second lug 14 of drawing in this battery 1 end from the outer ring, end, post the adhesive plaster 2 that second lug 14 that makes battery 1 outer ring and the pole piece in the battery 1 are isolated, especially described adhesive plaster 2 is that cover is affixed on battery 1 end and two relative side 16, the height H that adhesive plaster 2 is coated on battery 1 two relative side is 1/3rd of battery 1 total height, and relative battery 1 end is provided with porose seam 24 on the adhesive plaster 2, pass for the lug 12 in the middle of the battery 1, also be provided with on this adhesive plaster 2 if battery 1 inside is infiltrated for electrolyte in a hole 22.

Please together with reference to figure 3, wherein, second lug 14 is positioned at the other end of battery 1 with respect to first lug 12, therefore, holds in addition also in battery 1 that card is provided with adhesive plaster 2.

Please together with reference to figure 4, the utility model is by positive pole, barrier film and the stacked successively Stackable batteries core 1 that forms of negative pole, its two lug 14 is not positioned at battery 1 outer ring, adhesive plaster 2 ' is gone up relative battery 1 end porose seam 24 is set, also be provided with second hole seam 24 ', pass second hole seam 24 ' for second lug 14, isolated with the upper surface of electrode core body 1.

Be that example specifies with lithium rechargeable battery model more specifically below:

First embodiment: the width according to the LP063048A battery has designed a adhesive plaster, as shown in Figure 2, is used for the operation of manufacturing of LP063048A size battery.Battery is after the coiling operation is finished, use the bottom of clamp battery earlier, make the battery top expose anchor clamps (exposed portions serve be about battery total height 1/3), get the adhesive plaster of the above-mentioned shape of a slice then, be enclosed within on the battery, the lug that battery is middle passes the oval strip aperture on the adhesive plaster, and whether visual adhesive plaster is uniformly distributed in the battery both sides, press down adhesive plaster then, adhesive plaster is adjacent on battery.

Second embodiment: former battery structure is example (please join Fig. 3), and its battery 1 only is provided with the adhesive plaster 2 ' that is used to isolate between outer ring lug 14 and battery 1, now uses it for the operation of manufacturing of LP063048A size battery.

Be the result who falls the security performance contrast test of two kinds of batteries below:

First embodiment:

Model: LP063048A falling height: 1.5m (concrete floor)
Model: LP063048A falling height: 1.5m (concrete floor)									Numbering	Initial voltage (V)	Fall 6 voltages (V)	Fall 12 voltages (V)	Fall 18 voltages (V)	Initial internal resistance (m Ω)	Fall 6 internal resistances (m Ω)	Fall 12 internal resistances (m Ω)	Fall 18 internal resistances (m Ω)
1#	4.19	4.19	4.19	4.19	36	38	39	39	Numbering	Initial voltage (V)	Fall 6 voltages (V)	Fall 12 voltages (V)	Fall 18 voltages (V)	Initial internal resistance (m Ω)	Fall 6 internal resistances (m Ω)	Fall 12 internal resistances (m Ω)	Fall 18 internal resistances (m Ω)
1#	4.19	4.19	4.19	4.19	36	38	39	39	2#	4.19	4.19	4.19	4.19	37	39	39	40
3#	4.19	4.19	4.19	4.19	39	40	42	41	2#	4.19	4.19	4.19	4.19	37	39	39	40
3#	4.19	4.19	4.19	4.19	39	40	42	41	4#	4.18	4.18	4.18	4.18	38	38	38	38
5#	4.18	4.18	4.18	4.18	37	37	38	37	4#	4.18	4.18	4.18	4.18	38	38	38	38
5#	4.18	4.18	4.18	4.18	37	37	38	37	6#	4.19	4.19	4.19	4.18	35	35	36	37
7#	4.18	4.18	4.18	4.18	40	41	41	42	6#	4.19	4.19	4.19	4.18	35	35	36	37
7#	4.18	4.18	4.18	4.18	40	41	41	42	8#	4.19	4.19	4.19	4.19	43	43	43	44
9#	4.19	4.19	4.19	4.19	40	42	42	42	8#	4.19	4.19	4.19	4.19	43	43	43	44
9#	4.19	4.19	4.19	4.19	40	42	42	42	10#	4.19	4.19	4.18	4.19	38	40	40	41
11#	4.19	4.19	4.19	4.19	36	37	39	39	10#	4.19	4.19	4.18	4.19	38	40	40	41
11#	4.19	4.19	4.19	4.19	36	37	39	39	12#	4.19	4.19	4.19	4.19	39	39	39	40
Max.	4.19	4.19	4.19	4.19	43	43	43	44	12#	4.19	4.19	4.19	4.19	39	39	39	40
Max.	4.19	4.19	4.19	4.19	43	43	43	44	Min.	4.18	4.18	4.18	4.18	35	35	36	37
Ave.	4.19	4.19	4.19	4.19	38	39	40	40	Min.	4.18	4.18	4.18	4.18	35	35	36	37
Ave.	4.19	4.19	4.19	4.19	38	39	40	40	Phenomenon	Battery does not generate heat, anomaly such as breach, leakage except that slight swell

Second comparative example:

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To sum up test can find that the lithium rechargeable battery structure-improved of the utility model mode is compared with original lithium rechargeable battery, and more reliable relatively security performance has been arranged.

Claims

1, a kind of secondary cell comprises electrode core body, insulating tape and first and second lug, it is characterized in that:

The electrode core body is made of positive pole, barrier film and negative pole;

Insulating tape, cover is affixed on the upper surface and the two relative side of electrode core body;

Insulating tape is provided with the hole seam, is positioned at the position, upper surface of comparative electrode core body;

First and second lug is drawn from the electrode core body respectively, and first lug is drawn from the upper surface of electrode core body, and it is isolated with the upper surface of electrode core body to pass the hole seam.

According to the described a kind of secondary cell of claim 1, it is characterized in that 2, described second lug is drawn from the side of electrode core body, described insulating tape makes that the upper surface of second lug and electrode core body is isolated.

3, according to the described a kind of secondary cell of claim 1, it is characterized in that, the position, upper surface of comparative electrode core body also is provided with second hole seam on the described insulating tape, and described second lug is drawn from the upper surface of electrode core body, and it is isolated with the upper surface of electrode core body to pass second hole seam.

4, according to the described a kind of secondary cell of claim 1, it is characterized in that, also comprise:

Second lug is drawn from the lower surface of electrode core body, and the hole seam that passes on second insulating tape is isolated with the lower surface of electrode core body.

5, according to the described a kind of secondary cell of claim 1, it is characterized in that, also be provided with the hole that is used for capillary electrolysis liquid on the described insulating tape.

According to the described a kind of secondary cell of claim 5, it is characterized in that 6, the hole that is used for capillary electrolysis liquid on the described insulating tape is positioned at the position, upper surface of comparative electrode core body.

7, according to claim 1,2 or 3 described a kind of secondary cells, it is characterized in that the described electrode core body takeup type electrode core body that positive pole, barrier film and negative pole are reeled and formed of serving as reasons.

8, according to claim 1,3 or 4 described a kind of secondary cells, it is characterized in that the described electrode core body stacked successively stacked electrode core body that forms of positive pole, barrier film and negative pole of serving as reasons.