Electrochemical device and electronic device

An electronic device, comprising an electrochemical device, the electrochemical device comprising:

• an electrode assembly;
• a housing comprising a main body portion for accommodating the electrode assembly and a sealing portion connected to the main body portion;
• a tab electrically connected to the electrode assembly and protruding from the sealing portion;
• and
• a sealing member, disposed between the tab and the sealing portion, to seal the tab with the housing,
• wherein
• at least a portion of the sealing member is disposed in the sealing portion,
• the sealing member comprises a first sealing member and a second sealing member, and the tab is arranged between the first sealing member and the second sealing member,
• each of the first sealing member and the second sealing member comprises a first sealing layer, a second sealing layer, and a third sealing layer,
• the third sealing layer is located between the tab and the first sealing layer and is adhered to the tab, the first sealing layer is disposed on the third sealing layer, and the second sealing layer is disposed on the first sealing layer and is adhered to the sealing portion, and
• a melting point of the first sealing layer is lower than a melting point of the second sealing layer or a melting point of the third sealing layer, and a difference in the melting point between the first sealing layer and the second sealing layer is 35° C. to 50° C.° C., and a difference in the melting point between the first sealing layer and the third sealing layer is 35° C. to 50° C.