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AssigneeContemporary Amperex Technology Co., Limited
InventorsQichang Cai, Chengyou Xing, Libin Zhong, Wenwei Chen, Quankun Li, Peng Wang
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The present application provides an end cover assembly, a secondary battery, a battery module, a device, a liquid-injection method and a device thereof. The end cover assembly for the secondary battery includes: an end cover, provided with a through hole for injecting electrolyte, and including a connecting portion; a sealing assembly, configured to seal the through hole; a locking-fixing member, configured to be movable relative to the connecting portion in a radial direction of the through hole, so as to realize switching between a locked state and an unlocked state of the locking-fixing member and the connecting portion. In the locked state, the locking-fixing member presses against the sealing assembly to restrict the end cover to be separated from the sealing assembly; in the unlocked state, the end cover and the sealing assembly are separable to allow electrolyte to be injected from the through hole.
An end cover assembly for a secondary battery, comprising an end cover, provided with a through hole for injecting electrolyte therethrough and comprising a connecting portion;
A liquid-injection method for a secondary battery, comprising providing an end cover that comprises a through hole and a connecting portion, injecting electrolyte through the through hole;
Dependencies are inferred from the claim text.