WO2021223596A1 - 动力电池壳体及动力电池 - Google Patents

动力电池壳体及动力电池 Download PDF

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Publication number
WO2021223596A1
WO2021223596A1 PCT/CN2021/088719 CN2021088719W WO2021223596A1 WO 2021223596 A1 WO2021223596 A1 WO 2021223596A1 CN 2021088719 W CN2021088719 W CN 2021088719W WO 2021223596 A1 WO2021223596 A1 WO 2021223596A1
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WO
WIPO (PCT)
Prior art keywords
notch
explosion
power battery
proof structure
score
Prior art date
Application number
PCT/CN2021/088719
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
励建炬
Original Assignee
深圳市科达利实业股份有限公司
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 深圳市科达利实业股份有限公司 filed Critical 深圳市科达利实业股份有限公司
Priority to JP2021600177U priority Critical patent/JP3241483U/ja
Publication of WO2021223596A1 publication Critical patent/WO2021223596A1/zh

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    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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

  • This application relates to the technical field of power batteries, for example, to a power battery casing and a power battery.
  • the existing power battery is generally arranged in an explosion-proof structure.
  • the explosion-proof structure of the power battery is usually provided on the battery cover plate.
  • Such a structure not only makes the manufacturing process of the battery cover plate more complicated, but also reduces the strength of the battery cover plate to a certain extent.
  • the electrolyte or air pressure inside the battery case is sprayed from the top cover explosion-proof valve, which can easily cause secondary accidents to the power battery or car, and discharge from the safety valve at the bottom of the power battery (bottom of the car) to improve the car. Safety in case of power battery failure.
  • This application proposes a power battery casing, which is provided with an explosion-proof structure, which better ensures the safe use of the power battery, indirectly simplifies the structure of the battery cover, and reduces the production of the entire power battery cost.
  • This application proposes a power battery, which has a relatively simple structure and high safety in use.
  • the present application discloses a power battery casing, comprising: a main body, in which a containing cavity is provided, and the containing cavity is configured to contain a battery; On the bottom wall of the main body.
  • the application also discloses a power battery, including: the above-mentioned power battery housing; a cover plate, the cover plate is buckled on the open end of the accommodating cavity to close the accommodating cavity; a battery cell, the battery core is arranged In the containing cavity.
  • FIG. 1 is a schematic diagram of the structure of the power battery casing in the first embodiment of the present application.
  • Fig. 2 is a schematic diagram of the explosion-proof structure on the power battery casing of Fig. 1.
  • FIG. 3 is a schematic diagram of the structure of the power battery casing of the second embodiment of the present application.
  • Fig. 4 is a schematic diagram of the explosion-proof structure on the power battery housing shown in Fig. 3.
  • first and second may explicitly or implicitly include one or more of these features, which are used to distinguish and describe the features, without ordering, and without priority.
  • plural means two or more.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the specific meanings of the above terms in this application can be understood under specific circumstances.
  • the power battery housing of the embodiment of the present application includes a main body 1 and an explosion-proof structure 2.
  • the main body 1 defines an accommodating cavity 11, the accommodating cavity 11 is configured to accommodate batteries, and the explosion-proof structure 2 is provided on the main body. 1 on the side wall or the bottom wall of the main body 1.
  • the explosion-proof structure 2 is provided on the side wall of the main body 1 or the bottom wall of the main body 1. Therefore, in the power battery using the power battery casing of this embodiment, the explosion-proof structure 2 is provided on the power battery casing. In this way, there is no need to provide an explosion-proof structure 2 on the cover plate of the power battery, which simplifies the structure of the power battery cover plate and improves the strength of the power battery cover plate.
  • the explosion-proof structure 2 is provided on the side wall of the main body 1 or the bottom wall of the main body 1, when the explosion-proof structure 2 is active, the electrolyte inside the accommodating cavity 11 is ejected from the explosion-proof structure 2, and the electrolyte will face the explosion-proof structure
  • the side wall or bottom wall of 2 sprays, and there will be no electrolyte pollution or corrosion of the power battery wiring, thus avoiding the phenomenon of secondary accidents caused by the electrolyte spraying and corroding the power battery wiring, and improving the use of the power battery Reliability and safety in use.
  • the explosion-proof structure 2 is provided on the side wall of the main body 1 or the bottom wall of the main body 1, the structure of the power battery cover plate is indirectly simplified, the strength of the power battery cover plate is improved, and the It can better avoid the occurrence of secondary accidents when the electrolyte is sprayed out and corrode the power battery wiring, and the reliability and safety of the power battery are improved.
  • the side wall or bottom wall of the main body 1 is provided with explosion-proof holes, and the explosion-proof structure 2 is fitted in the explosion-proof holes and is welded to the main body 1.
  • the explosion-proof structure 2 can be connected to the main body 1 stably, and on the other hand, it can be ensured to a certain extent that the explosion-proof structure 2 can explode well when the internal pressure of the accommodating cavity 11 is too high.
  • the explosion-proof structure 2 and the main body 1 are integral stamped and formed parts.
  • the integral stamping and forming method can simplify the manufacturing process of the explosion-proof structure 2, thereby reducing the manufacturing cost of the main body 1.
  • the processing waste rate of the explosion-proof structure 2 of the integral stamping and forming part is lower, thereby reducing the manufacturing cost of the power battery casing.
  • the explosion-proof structure 2 is provided with a first notch 21 and a second notch 22, the depth of the first notch 21 is smaller than the depth of the second notch 22, and the first notch 21 and the second notch 22 are arranged at intervals, and the second notch 22 is located inside the first notch 21, wherein: when the internal air pressure of the accommodating cavity 11 exceeds the first threshold, the explosion-proof structure 2 is removed from the second notch 22 When the internal air pressure of the containing cavity 11 exceeds the second threshold value, the explosion-proof structure 2 ruptures from the first score 21, and the first threshold value is smaller than the second threshold value.
  • the explosion-proof structure 2 is provided with two notches.
  • the depth of the first notch 21 is smaller than the depth of the second notch 22.
  • the explosion-proof structure 2 first ruptures from the second notch 22.
  • the explosion-proof structure 2 ruptures from the first notch 21. Therefore, the explosion-proof structure 2 of this embodiment realizes the function of detonating twice according to the pressure inside the containing cavity 11, ensuring the safety of the power battery.
  • the first notch 21 is located outside the second notch 22, not only the aesthetics of the explosion-proof structure 2 is improved, but also the initiation pressure of the explosion-proof structure 2 can be stabilized.
  • the width of the first notch 21 gradually decreases in the downward direction, or the width of the second notch 22 gradually decreases in the downward direction, or the first notch 21
  • the width of ⁇ gradually decreases in the downward direction
  • the width of the second score 22 gradually decreases in the downward direction.
  • the widths of the first score 21 and the second score 22 are gradually reduced. On the one hand, it ensures that when the pressure inside the accommodating cavity 11 exceeds the threshold, the explosion-proof structure 2 can be removed from the first score 21 or the second score 22 Rupture, so as to better ensure the safety of the explosion-proof structure 2.
  • the strength of the explosion-proof structure 2 is improved, and the explosion-proof structure 2 is reduced from the first notch under the external force of the pressure inside the non-accommodating cavity 11. 21 or the second notch 22 is broken, thereby ensuring the reliability of the explosion-proof structure 2.
  • the width of the first notch 21 gradually decreases in the downward direction, and the width of the second notch 22 gradually decreases in the downward direction; in some embodiments, the first The width of the notch 21 gradually decreases in the downward direction, and the width of the second notch 22 does not change; in some embodiments, the width of the first notch 21 does not change, and the width of the second notch 22 is It gradually decreases in the downward direction.
  • the cross-sectional shape of the first notch 21 and the second notch 22 can be selected according to actual conditions, and is not limited to the above-mentioned wedge shape with a gradually decreasing width.
  • the explosion-proof structure 2 is further provided with a third notch 23, and both ends of the third notch 23 are respectively connected to the first notch 21 and the second notch 22 .
  • adding the third score 23 can ensure the strength at the second score 22, thereby preventing the explosion-proof structure 2 from being inside. Under the impact of pressure, rupture occurs at the first score 21 and the second score 22 at the same time.
  • the strength of the explosion-proof structure 2 at the second notch 22 can be increased, thereby avoiding the phenomenon that the explosion-proof structure 2 is simultaneously broken at the first notch 21 and the second notch 22 under the impact of internal pressure.
  • the width of the third score 23 gradually decreases in the downward direction.
  • the width of the third notch 23 is gradually reduced in the downward direction, which improves the strength of the explosion-proof structure 2 and reduces the explosion-proof structure 2 from breaking from the third notch 23 under external force other than the internal pressure of the battery, thereby ensuring The reliability of the battery explosion-proof structure 2 is improved.
  • the cross-sectional shape of the third notch 23 can be selected according to actual conditions, and is not limited to the aforementioned shape with a gradually decreasing width.
  • the explosion-proof structure 2 is provided with a cross score 24 and an extension score 25.
  • the cross score 24 includes a plurality of scores, and there is at least one intersection point between the plurality of scores. The intersection point coincides with the geometric center of the upper surface of the explosion-proof structure 2, and the epitaxial notch 25 is located outside the cross notch 24.
  • this embodiment also includes an extension score 25 located outside of the cross score 24. The presence of the extension score 25 can quickly release the air pressure of the main body 1, thereby improving the safety of the power battery.
  • the explosion-proof structure 2 is provided with a score groove 26, and the cross score 24 and the extension score 25 are both provided on the bottom wall of the score groove 26.
  • the thickness of the explosion-proof structure 2 required for the power battery is thin, if the cross-cut 24 and the epitaxial notch 25 are directly processed on the explosion-proof structure 2, the raw materials for manufacturing the explosion-proof structure 2 will be very thin, which is not convenient for cutting and processing.
  • a notch groove 26 is provided on the explosion-proof structure 2, and the cross notch 24 and the epitaxial notch 25 are both located on the bottom wall of the notch groove 26. In this way, during the processing, a relatively thick plate can be selected as the raw material, thereby facilitating the processing of the explosion-proof structure 2 and reducing the scrap rate of the explosion-proof structure 2.
  • multiple scratches intersect at one point.
  • Multiple scratches intersect at a point, which coincides with the geometric center of the upper surface of the explosion-proof structure 2, making the explosion-proof structure 2 easier to explode from the geometric center of the upper surface of the explosion-proof structure 2, thereby improving the detonation of the explosion-proof structure 2 Sensitivity.
  • the intersecting score 24 is an axially symmetrical figure. Therefore, when the pressure inside the accommodating cavity 11 is too high, the explosion-proof structure 2 can be uniformly exploded at the cross notches 24, so that the air pressure inside the battery can be uniformly released, and the safety of the battery is improved.
  • the shape of the cross notch 24 can be selected according to actual needs, and is not limited to the axisymmetric figure of this embodiment.
  • the power battery housing of this embodiment includes a main body 1 and an explosion-proof structure 2.
  • the main body 1 defines a containing cavity 11, the containing cavity 11 is configured to contain the battery cell, and one end of the containing cavity 11 is open.
  • the open end of the accommodating cavity is matched with the cover plate of the power battery, and the explosion-proof structure 2 is arranged on the side wall of the main body 1.
  • the explosion-proof structure 2 is provided with a first score 21, a second score 22, and a third score 23.
  • the depth of the first score 21 is smaller than the depth of the second score 22.
  • the second notches 22 are arranged at intervals, and the second notches 22 are located inside the first notches 21, and the two ends of the third notches 23 are respectively communicated with the first notches 21 and the second notches 22.
  • the power battery housing of this embodiment includes a main body 1 and an explosion-proof structure 2.
  • the main body 1 defines an accommodating cavity 11.
  • the open end of the cavity 11 is matched with the cover plate of the power battery, and the explosion-proof structure 2 is provided on the bottom wall of the main body 1.
  • the explosion-proof structure 2 is provided with a score groove 26.
  • the bottom wall of the score groove 26 is provided with a cross score 24, an extension score 25 and a surrounding score 27.
  • the cross score 24 includes two scratches, two scratches There is an intersection point therebetween, the intersection point coincides with the geometric center of the upper surface of the explosion-proof structure 2, and the epitaxial score 25 is located outside the intersection score 24.
  • the surrounding notch 27 is located outside the epitaxial notch 25.
  • the application also discloses a power battery, which includes the aforementioned power battery casing, a cover plate and a battery core.
  • the cover plate is fastened on the open end of the accommodating cavity 11 to close the accommodating cavity 11, and the battery core is arranged in the accommodating cavity 11.
  • the power battery of the embodiment of the present application due to the power battery housing described above, simplifies the structure of the cover plate, improves the strength of the cover plate, and avoids corrosion of the electrolyte inside the containing cavity 11 after spraying from the explosion-proof structure 2
  • the phenomenon of power battery wiring improves the reliability and safety of the power battery.

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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)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
PCT/CN2021/088719 2020-05-07 2021-04-21 动力电池壳体及动力电池 WO2021223596A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021600177U JP3241483U (ja) 2020-05-07 2021-04-21 動力電池缶及び動力電池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010379185.7A CN111430638A (zh) 2020-05-07 2020-05-07 一种动力电池壳体及动力电池
CN202010379185.7 2020-05-07

Publications (1)

Publication Number Publication Date
WO2021223596A1 true WO2021223596A1 (zh) 2021-11-11

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JP (1) JP3241483U (hu)
CN (1) CN111430638A (hu)
DE (1) DE202021102439U1 (hu)
FR (1) FR3110029B3 (hu)
HU (1) HU5426U (hu)
WO (1) WO2021223596A1 (hu)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114284631A (zh) * 2021-12-09 2022-04-05 江苏恒驰动力科技有限公司 一种带防爆泄压功能的电池壳体及防爆片的设置方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111430638A (zh) * 2020-05-07 2020-07-17 深圳市科达利实业股份有限公司 一种动力电池壳体及动力电池
CN113140863B (zh) * 2021-03-10 2022-08-02 浙江吉利控股集团有限公司 一种电池阻燃盖板、锂离子电池及车辆
CN113594622A (zh) * 2021-07-21 2021-11-02 宁波小顶科技有限公司 一体式电池定向排气装置
CN113594621A (zh) * 2021-07-21 2021-11-02 宁波小顶科技有限公司 一种填充式电池排气装置
CN216354617U (zh) * 2021-11-30 2022-04-19 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN117242624A (zh) * 2022-03-18 2023-12-15 宁德时代新能源科技股份有限公司 泄压机构、电池单体、电池及用电设备
CN218274965U (zh) * 2022-06-13 2023-01-10 欣旺达惠州动力新能源有限公司 电池及电池模组
CN117254203A (zh) 2023-09-01 2023-12-19 晶科储能科技有限公司 电芯顶盖的防爆阀以及电芯顶盖

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CN102170011A (zh) * 2010-02-26 2011-08-31 日立车辆能源株式会社 二次电池
CN103155214A (zh) * 2010-10-13 2013-06-12 早出长野股份有限公司 电池壳体用盖及电池壳体用盖的制造方法
CN206098511U (zh) * 2016-01-06 2017-04-12 深圳市科达利实业股份有限公司 动力电池的防爆装置以及防爆电池
CN207183323U (zh) * 2017-07-28 2018-04-03 深圳市欣迪盟新能源科技股份有限公司 电池外壳
CN208014752U (zh) * 2018-04-27 2018-10-26 深圳市比克动力电池有限公司 一种圆柱锂离子电池防爆外壳及其成型模具
CN208460852U (zh) * 2018-03-30 2019-02-01 宁德时代新能源科技股份有限公司 防爆膜及二次电池顶盖
CN111430638A (zh) * 2020-05-07 2020-07-17 深圳市科达利实业股份有限公司 一种动力电池壳体及动力电池
CN212062550U (zh) * 2020-05-07 2020-12-01 深圳市科达利实业股份有限公司 一种动力电池壳体及动力电池

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102170011A (zh) * 2010-02-26 2011-08-31 日立车辆能源株式会社 二次电池
CN103155214A (zh) * 2010-10-13 2013-06-12 早出长野股份有限公司 电池壳体用盖及电池壳体用盖的制造方法
CN206098511U (zh) * 2016-01-06 2017-04-12 深圳市科达利实业股份有限公司 动力电池的防爆装置以及防爆电池
CN207183323U (zh) * 2017-07-28 2018-04-03 深圳市欣迪盟新能源科技股份有限公司 电池外壳
CN208460852U (zh) * 2018-03-30 2019-02-01 宁德时代新能源科技股份有限公司 防爆膜及二次电池顶盖
CN208014752U (zh) * 2018-04-27 2018-10-26 深圳市比克动力电池有限公司 一种圆柱锂离子电池防爆外壳及其成型模具
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CN212062550U (zh) * 2020-05-07 2020-12-01 深圳市科达利实业股份有限公司 一种动力电池壳体及动力电池

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114284631A (zh) * 2021-12-09 2022-04-05 江苏恒驰动力科技有限公司 一种带防爆泄压功能的电池壳体及防爆片的设置方法

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HU5426U (hu) 2022-04-28
FR3110029A3 (fr) 2021-11-12
FR3110029B3 (fr) 2022-06-10
JP3241483U (ja) 2023-04-05
CN111430638A (zh) 2020-07-17
DE202021102439U1 (de) 2021-07-28

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