Lower plastic assembly, end cover assembly, energy-storage apparatus, and electronic device

An end cover assembly, comprising an upper cover and a lower plastic assembly, wherein

• the lower plastic assembly is applicable to an energy-storage apparatus and comprises a first lower plastic member, wherein the first lower plastic member comprises a first-lower-plastic-member body, wherein the first-lower-plastic-member body has a first top surface and a first bottom surface opposite the first top surface, and further comprises a first part, and a second part;
• the first part and the second part cooperatively define a first deformation portion in a length direction of the first-lower-plastic-member body, a ratio of a depth h1 of the first deformation portion to a height h2 of the first part ranges from 0.05 to 0.42 in a thickness direction of the first-lower-plastic-member body, and a ratio of the depth h1 of the first deformation portion to a height h3 of the second part ranges from 0.16 to 0.6;
• and
• the first deformation portion has a first notch and a first sub-notch, wherein the first sub-notch extends through the first top surface and the first bottom surface and is in communication with the first notch, the first sub-notch extends away from the first notch in a width direction of the first-lower-plastic-member body, and an orthogonal projection of the first notch on the first top surface falls within an orthogonal projection of the first sub-notch on the first top surface;
• and
• the lower plastic assembly comprises a second lower plastic member, wherein the first lower plastic member and the second lower plastic member are stacked to one side of the upper cover, one end of the first lower plastic member faces and abuts against one end of the second lower plastic member, the first lower plastic member and the second lower plastic member are arranged side by side in a length direction of the upper cover, and in the length direction of the upper cover, a dimension L2 of the second lower plastic member is greater than a dimension L1 of the first lower plastic member.

An energy-storage apparatus, comprising a housing, an electrode assembly, and an end cover assembly, wherein the housing defines an opening and an accommodation cavity, the electrode assembly is accommodated in the accommodation cavity, and the end cover assembly covers the opening, wherein the end cover assembly comprises an upper cover and a lower plastic assembly, and wherein

• the lower plastic assembly is applicable to an energy-storage apparatus and comprises a first lower plastic member, wherein the first lower plastic member comprises a first-lower-plastic-member body, wherein the first-lower-plastic-member body has a first top surface and a first bottom surface opposite the first top surface, and further comprises a first part, and a second part;
• the first deformation portion is located between the first part and the second part in a length direction of the first lower plastic member body the first part and the second part cooperatively define a first deformation portion in a length direction of the first-lower-plastic-member body, a ratio of a depth h1 of the first deformation portion to a height h2 of the first part ranges from 0.05 to 0.42 in a thickness direction of the first-lower-plastic-member body, and a ratio of the depth h1 of the first deformation portion to a height h3 of the second part ranges from 0.16 to 0.6;
• and
• the first deformation portion has a first notch and a first sub-notch, wherein the first sub-notch extends through the first top surface and the first bottom surface and is in communication with the first notch, the first sub-notch extends away from the first notch in a width direction of the first-lower-plastic-member body, and an orthogonal projection of the first notch on the first top surface falls within an orthogonal projection of the first sub-notch on the first top surface;
• and
• the lower plastic assembly comprises a second lower plastic member, wherein the first lower plastic member and the second lower plastic member are stacked to one side of the upper cover, one end of the first lower plastic member faces and abuts against one end of the second lower plastic member, the first lower plastic member and the second lower plastic member are arranged side by side in a length direction of the upper cover, and in the length direction of the upper cover, a dimension L2 of the second lower plastic member is greater than a dimension L1 of the first lower plastic member.