1. WO2026174422 - BATTERY CELL, BATTERY APPARATUS AND ELECTRICAL APPARATUS

Publication Number WO/2026/174422

Publication Date 27.08.2026

International Application No. PCT/CN2025/077856

International Filing Date 18.02.2025

IPC

H01M 50/342 2021.1

H	ELECTRICITY
01	ELECTRIC ELEMENTS
M	PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50	Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
30	Arrangements for facilitating escape of gases
342	Non-re-sealable arrangements

H01M 50/375 2021.1

H	ELECTRICITY
01	ELECTRIC ELEMENTS
M	PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50	Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
30	Arrangements for facilitating escape of gases
375	Vent means sensitive to or responsive to temperature

H01M 50/342 2021.1

H	ELECTRICITY
01	ELECTRIC ELEMENTS
M	PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50	Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
30	Arrangements for facilitating escape of gases
342	Non-re-sealable arrangements

H01M 50/375 2021.1

H	ELECTRICITY
01	ELECTRIC ELEMENTS
M	PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50	Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
30	Arrangements for facilitating escape of gases
375	Vent means sensitive to or responsive to temperature

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Applicants

• 宁德时代新能源科技股份有限公司 CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED [CN]/[CN]

Inventors

• 陈圣旺 CHEN, Shengwang
• 周文林 ZHOU, Wenlin
• 叶钢平 YE, Gangping
• 郭志君 GUO, Zhijun

Agents

• 北京维飞联创知识产权代理有限公司 BEIJING WEIFEI LIANCHUANG INTELLECTUAL PROPERTY AGENCY CO., LTD.

Priority Data

Publication Language Chinese (zh)

Filing Language Chinese (zh)

Designated States

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AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CV, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IQ, IR, IS, IT, JM, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, MG, MK, MN, MU, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UY, UZ, VC, VN, WS, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, CV, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SC, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)

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Title

(EN) BATTERY CELL, BATTERY APPARATUS AND ELECTRICAL APPARATUS

(FR) CELLULE DE BATTERIE, APPAREIL DE BATTERIE ET APPAREIL ÉLECTRIQUE

(ZH) 电池单体、电池装置及用电装置

Abstract

(EN) Provided in the present application are a battery cell, a battery apparatus and an electrical apparatus. The battery cell comprises a casing, an electrode assembly and a pressure relief mechanism. The casing has a first wall, and the material of the first wall comprises steel. The electrode assembly is accommodated within the casing. The pressure relief mechanism is arranged on the first wall and is welded to the first wall. The pressure relief mechanism has a weak portion, the weak portion being configured to at least partially rupture when the inner pressure of the casing reaches a threshold, so as to relieve the inner pressure of the casing. The first wall comprises at least one buffer portion, the buffer portion being arranged around the pressure relief mechanism, and the buffer portion can absorb at least part of welding stress generated by the welding of the pressure relief mechanism to the first wall, thereby reducing the risk of premature rupture of the weak portion of the pressure relief mechanism within a normal cycle period under the effect of the welding stress, prolonging the service life of the pressure relief mechanism, and prolonging the service life of the battery cell.

(FR) La présente demande concerne une cellule de batterie, un appareil de batterie et un appareil électrique. La cellule de batterie comprend un boîtier, un ensemble électrode et un mécanisme de décompression. Le boîtier a une première paroi, et le matériau de la première paroi comprend de l'acier. L'ensemble électrode est reçu dans le boîtier. Le mécanisme de décompression est disposé sur la première paroi et est soudé à la première paroi. Le mécanisme de décompression a une partie faible, la partie faible étant configurée pour se rompre au moins partiellement lorsque la pression interne du boîtier atteint un seuil, de manière à relâcher la pression interne du boîtier. La première paroi comprend au moins une partie tampon, la partie tampon étant disposée autour du mécanisme de décompression, et la partie tampon peut absorber au moins une partie de la contrainte de soudage générée par le soudage du mécanisme de décompression à la première paroi, ce qui permet de réduire le risque de rupture prématurée de la partie faible du mécanisme de décompression dans une période de cyclage normale sous l'effet de la contrainte de soudage, de prolonger la durée de vie du mécanisme de décompression et de prolonger la durée de vie de la cellule de batterie.

(ZH) 本申请提供了一种电池单体、电池装置及用电装置。电池单体包括外壳、电极组件和泄压机构。外壳具有第一壁，第一壁的材质包括钢。电极组件容纳于外壳内。泄压机构设置于第一壁，并与第一壁焊接连接，泄压机构具有薄弱部，薄弱部被配置为在外壳的内部压力达到阈值时至少部分被破坏，以泄放外壳的内部压力。其中，第一壁包括至少一个缓冲部，缓冲部环绕泄压机构设置。缓冲部能够吸收泄压机构与第一壁焊接所产生的焊接应力的至少一部分，降低了泄压机构的薄弱部在焊接应力的影响下，在正常循环周期内提前被破坏的风险，提高了泄压机构的使用寿命，进而提高了电池单体的使用寿命。

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