WO2008145045A1 - Lithium ion battery explosion proof device - Google Patents

Lithium ion battery explosion proof device Download PDF

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Publication number
WO2008145045A1
WO2008145045A1 PCT/CN2008/070939 CN2008070939W WO2008145045A1 WO 2008145045 A1 WO2008145045 A1 WO 2008145045A1 CN 2008070939 W CN2008070939 W CN 2008070939W WO 2008145045 A1 WO2008145045 A1 WO 2008145045A1
Authority
WO
WIPO (PCT)
Prior art keywords
explosion
concave ring
explosion proof
battery
proof membrane
Prior art date
Application number
PCT/CN2008/070939
Other languages
French (fr)
Chinese (zh)
Inventor
Dianquan Song
Bing Huang
Chuntao Zhang
Tiejian Liu
Meng Chen
Changliang Sun
Hua Zhang
Dongmei Miao
Original Assignee
Harbin Coslight Power Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harbin Coslight Power Co., Ltd filed Critical Harbin Coslight Power Co., Ltd
Publication of WO2008145045A1 publication Critical patent/WO2008145045A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the beneficial effects of the invention are:
  • the explosion-proof device has a compact structure, and the protective cover does not cause accidental damage of the explosion-proof membrane during assembly and use, thereby achieving an increase in internal pressure when the battery fails, exceeding the pressure relief value of the protective film.
  • the protective film is broken to prevent the electrolyte inside the battery from being sprayed to the user.
  • the manufacturing process of the invention is simple, and can be used as a safety device fitting for various series, various specifications and various types of batteries, and can be welded or bonded to the battery cover or the battery case, so it can be applied to various specifications. In the battery.
  • Embodiment 3 Referring to FIG. 1 and FIG. 2, the difference between this embodiment and the first embodiment is that the outer periphery of the lower end surface of the explosion-proof membrane 2 is bonded to the outer side of the inner surface of the recess of the concave ring 3. On the periphery, the side wall surface of the shield 1 is bonded to the inner side wall of the recess of the concave ring 3.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

A lithium ion battery explosion proof device has through holes at a bottom of the concave ring (3), and a shield (1) with a sidewall end connected with an upper inside wall of a groove of the concave ring (3). An explosion proof film (2) is provided between the shield (1) and the concave ring (3), and an outer edge of the explosion proof film (2) is connected with an outer edge of the groove of the concave ring (3). Breaches (4) are provided at the edge of the shield (1). The shield (1) protects the explosion proof film (2) from unexpected damage, and protects a user from injuring by the inside spouting electrolyte when the explosion proof film (2) breaks. The device provides safety for any type of a battery, and can be directly fixed on the battery cover or the battery case.

Description

说明书 锂离子电池防爆装置  Instructions Lithium-ion battery explosion-proof device
[1] 技术领域  [1] Technical field
[2] 本发明涉及一种电池防爆装置。  [2] The present invention relates to a battery explosion-proof device.
[3] 背景技术  [3] Background Art
[4] 目前， 随着锂离子电池的不断发展， 锂电池新材料的不断出现， 大容量锂离子 动力电池技术日渐成熟， 为防止锂离子电池爆炸， 确保电池的使用安全。 现有 电动自行车、 电动汽车用锂离子电池在电池盖板的中间位置设有一个开启压力 为 0.3Mpa~0.6Mpa的防爆膜， 由于防爆膜的厚度只有 40μηι左右， 非常的薄， 因 此在动力电池制造、 使用过程中防爆膜容易被碰触造成损坏； 此外， 当电池失 效内压增大， 致使防爆膜破裂吋， 会造成电池内部的电解液喷出， 易对使用者 造成伤害。  [4] At present, with the continuous development of lithium-ion batteries, new materials for lithium batteries continue to emerge, and large-capacity lithium-ion battery technology is becoming more and more mature. To prevent the explosion of lithium-ion batteries, ensure the safety of batteries. The existing lithium-ion battery for electric bicycles and electric vehicles is provided with an explosion-proof membrane with an opening pressure of 0.3Mpa~0.6Mpa in the middle of the battery cover. Since the thickness of the explosion-proof membrane is only about 40μηι, it is very thin, so the power battery During the manufacturing and use, the explosion-proof membrane is easily damaged by contact; in addition, when the internal pressure of the battery fails, the explosion-proof membrane is broken, which may cause the electrolyte inside the battery to be ejected, which may cause damage to the user.
[5] 发明内容  [5] Summary of the invention
[6] 本发明为解决现有锂离子电池的防爆膜在制造和使用过程中易损坏、 当电池失 效内压增大、 防爆膜破裂吋造成电池内部的电解液喷出， 易对使用者造成伤害 的问题， 而提供一种锂离子电池防爆装置。 它由防护罩、 防爆膜和凹形环组成 ， 凹形环的底部开有通孔， 防护罩的侧壁面连接在凹形环的凹槽内侧圆壁的上 端， 防爆膜设置在防护罩和凹形环之间， 防爆膜下侧端面的外侧周边连接在凹 形环的凹槽底面的外侧周边上， 防护罩的边缘开有多个豁口。  [6] The invention solves the problem that the explosion-proof membrane of the existing lithium ion battery is easy to be damaged during manufacture and use, the internal pressure of the battery is increased, and the explosion-proof membrane is broken, causing the electrolyte inside the battery to be ejected, which is easy to cause to the user. The problem of injury, while providing a lithium-ion battery explosion-proof device. The utility model is composed of a protective cover, an explosion-proof membrane and a concave ring. The bottom of the concave ring is provided with a through hole, and the side wall surface of the protective cover is connected to the upper end of the inner wall of the groove of the concave ring, and the explosion-proof membrane is disposed on the protective cover and the concave Between the rings, the outer periphery of the lower end surface of the explosion-proof membrane is connected to the outer periphery of the bottom surface of the recess of the concave ring, and the edge of the shield is provided with a plurality of slits.
[7] 本发明的有益效果是： 防爆装置的结构紧凑， 防护罩使装配和使用过程中不会 造成防爆膜的意外损坏， 从而达到当电池失效内压增大， 超过防护膜的泄压值 ， 防护膜破裂吋防止电池内部的电解液喷出对使用者造成伤害的目的。 另外本 发明的制造工艺简单， 既可以作为各种系列、 各种规格、 各种型号电池的安全 装置配件， 又可焊接或粘接于电池盖板或电池壳上， 因此可以应用于各种规格 的电池中。  [7] The beneficial effects of the invention are: The explosion-proof device has a compact structure, and the protective cover does not cause accidental damage of the explosion-proof membrane during assembly and use, thereby achieving an increase in internal pressure when the battery fails, exceeding the pressure relief value of the protective film. The protective film is broken to prevent the electrolyte inside the battery from being sprayed to the user. In addition, the manufacturing process of the invention is simple, and can be used as a safety device fitting for various series, various specifications and various types of batteries, and can be welded or bonded to the battery cover or the battery case, so it can be applied to various specifications. In the battery.
[8] 附图说明  [8] BRIEF DESCRIPTION OF THE DRAWINGS
[9] 图 1是本发明的整体结构示意图， 图 2是图 1的 Α-Α剖视图。 [10] 具体实施方式 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the entire structure of the present invention, and Fig. 2 is a cross-sectional view taken along line Α-Α of Fig. 1. [10] Specific implementation
[11] 具体实施方式一： 参见图 1和图 2， 本实施方式由防护罩 1、 防爆膜 2和凹形环 3 组成， 凹形环 3的底部开有通孔 5， 防护罩 1的侧壁面连接在凹形环 3的凹槽内侧 圆壁的上端， 防爆膜 2设置在防护罩 1和凹形环 3之间， 防爆膜 2下侧端面的外侧 周边连接在凹形环 3的凹槽底面的外侧周边上， 防护罩 1的边缘开有多个豁口 4。 防爆膜 2设置在防护罩 1和凹形环 3之间， 可使防爆膜 2避免在装配或使用过程中 损坏； 本发明的防爆装置设置在电池盖上， 当电池失效内压增大吋， 电池内部 的电解液从通孔 5流入凹形环 3内并接触到防爆膜 2， 达到防爆膜 2的开启压力吋 防爆膜 2被挤破， 电池内部的电解液从防爆膜 2被挤破的缺口处喷出， 电解液喷 射到防护罩 1上吋速度减缓并改变方向， 从防护罩 1边缘的豁口 4流出， 不会对使 用者造成伤害。  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring to FIG. 1 and FIG. 2, the present embodiment is composed of a protective cover 1, an explosion-proof membrane 2 and a concave ring 3. The bottom of the concave ring 3 is provided with a through hole 5, and the side of the protective cover 1 The wall is connected to the upper end of the inner wall of the groove of the concave ring 3, the explosion-proof membrane 2 is disposed between the shield 1 and the concave ring 3, and the outer periphery of the lower end surface of the explosion-proof membrane 2 is connected to the groove of the concave ring 3. On the outer periphery of the bottom surface, a plurality of slits 4 are formed in the edge of the shield 1. The explosion-proof membrane 2 is disposed between the protective cover 1 and the concave ring 3, so that the explosion-proof membrane 2 can be prevented from being damaged during assembly or use; the explosion-proof device of the present invention is disposed on the battery cover, and when the battery fails, the internal pressure increases, The electrolyte inside the battery flows from the through hole 5 into the concave ring 3 and contacts the explosion-proof membrane 2, and reaches the opening pressure of the explosion-proof membrane 2, the explosion-proof membrane 2 is squeezed, and the electrolyte inside the battery is squeezed from the explosion-proof membrane 2. The gap is ejected, and the electrolyte is sprayed onto the shield 1 to slow down and change direction, and flows out from the gap 4 at the edge of the shield 1 without causing damage to the user.
[12] 具体实施方式二： 参见图 1和图 2， 本实施方式与具体实施方式一的不同点在于 防爆膜 2下侧端面的外侧周边焊接在凹形环 3的凹槽内底面的外侧周边上， 防护 罩 1的侧壁面焊接在凹形环 3的凹槽内侧圆壁上。 所述的焊接方式为激光焊接。  [12] Embodiment 2: Referring to FIG. 1 and FIG. 2, the difference between this embodiment and the first embodiment is that the outer periphery of the lower end surface of the explosion-proof membrane 2 is welded to the outer periphery of the bottom surface of the recess of the concave ring 3. Above, the side wall surface of the shield 1 is welded to the inner wall of the groove of the concave ring 3. The welding method described is laser welding.
[13] 具体实施方式三： 参见图 1和图 2， 本实施方式与具体实施方式一的不同点在于 防爆膜 2下侧端面的外侧周边粘接在凹形环 3的凹槽内底面的外侧周边上， 防护 罩 1的侧壁面粘接在凹形环 3的凹槽内侧圆壁上。  [13] Embodiment 3: Referring to FIG. 1 and FIG. 2, the difference between this embodiment and the first embodiment is that the outer periphery of the lower end surface of the explosion-proof membrane 2 is bonded to the outer side of the inner surface of the recess of the concave ring 3. On the periphery, the side wall surface of the shield 1 is bonded to the inner side wall of the recess of the concave ring 3.

Claims

权利要求书 Claim
[1] 1、 一种锂离子电池防爆装置， 它由防护罩 (1)、 防爆膜 (2)和凹形环 (3)组成 [1] 1. A lithium-ion battery explosion-proof device consisting of a protective cover (1), an explosion-proof membrane (2) and a concave ring (3)
， 其特征在于凹形环 (3)的底部开有通孔 (5)， 防护罩 (1)的侧壁面连接在凹形 环 (3)的凹槽内侧圆壁的上端， 防爆膜 (2)设置在防护罩 (1)和凹形环 (3)之间 ， 防爆膜 (2)下侧端面的外侧周边连接在凹形环 (3)的凹槽底面的外侧周边上 ， 防护罩 (1)的边缘开有多个豁口 (4)。 , characterized in that the bottom of the concave ring (3) is provided with a through hole (5), and the side wall surface of the protective cover (1) is connected to the upper end of the inner wall of the groove of the concave ring (3), the explosion-proof membrane (2) It is disposed between the protective cover (1) and the concave ring (3), and the outer periphery of the lower end surface of the explosion-proof membrane (2) is connected to the outer periphery of the bottom surface of the groove of the concave ring (3), the protective cover (1) The edge has a plurality of slits (4).
2、 根据权利要求 1所述的锂离子电池防爆装置， 其特征在于防爆膜 (2)下侧 端面的外侧周边焊接在凹形环 (3)的凹槽内底面的外侧周边上， 防护罩 (1)的 侧壁面焊接在凹形环 (3)的凹槽内侧圆壁上。  2. The lithium ion battery explosion-proof device according to claim 1, wherein the outer periphery of the lower end surface of the explosion-proof membrane (2) is welded to the outer periphery of the inner bottom surface of the recess of the concave ring (3), the protective cover ( The side wall surface of 1) is welded to the inner wall of the groove of the concave ring (3).
3、 根据权利要求 1所述的锂离子电池防爆装置， 其特征在于防爆膜 (2)下侧 端面的外侧周边粘接在凹形环 (3)的凹槽内底面的外侧周边上， 防护罩 (1)的 侧壁面粘接在凹形环 (3)的凹槽内侧圆壁上。  3. The lithium ion battery explosion-proof device according to claim 1, characterized in that the outer periphery of the lower end surface of the explosion-proof membrane (2) is adhered to the outer periphery of the inner bottom surface of the recess of the concave ring (3), the protective cover The side wall surface of (1) is bonded to the inner wall of the groove of the concave ring (3).
PCT/CN2008/070939 2007-05-25 2008-05-12 Lithium ion battery explosion proof device WO2008145045A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200720116271.9 2007-05-25
CNU2007201162719U CN201038197Y (en) 2007-05-25 2007-05-25 Lithium ion cell explosion-proof device

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WO2008145045A1 true WO2008145045A1 (en) 2008-12-04

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WO (1) WO2008145045A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201038197Y (en) * 2007-05-25 2008-03-19 哈尔滨光宇电源股份有限公司 Lithium ion cell explosion-proof device
CN104319360B (en) * 2014-11-11 2017-01-25 东莞新能源科技有限公司 Lithium ion battery and battery pack

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2270276Y (en) * 1996-09-16 1997-12-10 吕紫良 Secondary battery explosion-protection equipment
JPH11283600A (en) * 1998-03-31 1999-10-15 Sanyo Electric Co Ltd Sealed battery
JP2005123060A (en) * 2003-10-17 2005-05-12 Matsushita Electric Ind Co Ltd Manufacturing method of sealed battery
CN2747712Y (en) * 2004-08-06 2005-12-21 刘毅 Explosion proof safety valve for battery
JP2006125559A (en) * 2004-10-29 2006-05-18 Power System:Kk Gas bleeding valve
CN201038197Y (en) * 2007-05-25 2008-03-19 哈尔滨光宇电源股份有限公司 Lithium ion cell explosion-proof device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2270276Y (en) * 1996-09-16 1997-12-10 吕紫良 Secondary battery explosion-protection equipment
JPH11283600A (en) * 1998-03-31 1999-10-15 Sanyo Electric Co Ltd Sealed battery
JP2005123060A (en) * 2003-10-17 2005-05-12 Matsushita Electric Ind Co Ltd Manufacturing method of sealed battery
CN2747712Y (en) * 2004-08-06 2005-12-21 刘毅 Explosion proof safety valve for battery
JP2006125559A (en) * 2004-10-29 2006-05-18 Power System:Kk Gas bleeding valve
CN201038197Y (en) * 2007-05-25 2008-03-19 哈尔滨光宇电源股份有限公司 Lithium ion cell explosion-proof device

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