Secondary battery
AssigneeSamsung SDI Co., Ltd.
InventorsKiwoong KIM, Jaehoon CHOI, Kyungjae SHIN
Life of this patent
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Abstract
A secondary battery includes a bare cell and a protective circuit module. The protective circuit module includes a protective circuit board, a first terminal, and a second terminal. The first and second terminals are electrically connected to positive and negative electrode tabs of the bare cell. The positive electrode tab and the negative electrode tab are respectively soldered to the first terminal and the second terminal, solder layers are on respective surfaces of the positive electrode tab soldered to the first terminal, and a solder layer is on one or more of the second terminal or the negative electrode tab.
Claims20
A secondary battery, comprising:
- a bare cell including an electrode assembly, electrode tabs, and a case accommodating the electrode assembly, the electrode assembly including a separator between a positive electrode plate and a negative electrode plate, the electrode tabs including positive and negative electrode tabs respectively extending from the positive and negative electrode plates;
- and
- a protective circuit module outside the case and including a protective circuit board, a first terminal, and a second terminal, the first and second terminals on the protective circuit board and electrically connected to the positive and negative electrode tabs, respectively, wherein:
- the positive electrode tab and the negative electrode tab are respectively soldered to the first terminal and the second terminal,
- solder layers are on respective surfaces of the positive electrode tab soldered to the first terminal, and
- a solder layer is on one or more of the second terminal or the negative electrode tab.
A method for forming a secondary battery, comprising:
- applying a solder layer to a first electrode tab of the battery;
- aligning the first electrode tab and a second electrode tab of the battery with respective first and second terminals;
- and
- applying heat to solder the first and second electrode tabs to the first and second terminals, respectively, wherein the first electrode tab includes a first metal and the second electrode tab includes a second metal different from the first metal, and wherein the second electrode tab excludes a solder layer before heat when the first and second electrode tabs are aligned with the first and second terminals.
An electrode tab arrangement for a secondary battery, comprising:
- a first electrode tab;
- a second electrode tab;
- a first terminal attached to the first electrode tab;
- and
- a second terminal attached to the second electrode tab, wherein the first electrode tab includes a solder layer at a first time when the first terminal is soldered to the first electrode tab, and wherein the second electrode tab excludes a solder layer at a second time when the second terminal is soldered to the second electrode tab.
Dependencies are inferred from the claim text.