Built-in constant-voltage protection structural member and rechargeable battery using same

The invention provides a built-in constant-voltage protection structural member. An insulation elastic part is arranged on each of the two surfaces of a printed circuit board (PCB), at least one penetrating hole is formed in the insulation elastic part, and the PCB comprises a substrate, a voltage converter, a protective integrated circuit (IC), an inductor, a diode, a first resistor (R1), a second resistor (R2), a third resistor (R3), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a fourth capacitor (C4) and a fifth capacitor (C5). The invention also provides a rechargeable battery using the built-in constant-voltage protection structural member arranged between a battery cell and a punching groove position of a shell The rechargeable battery is novel in structure and is convenient to fabricate, the voltage output can be limited according to demands, and the market demand is met. 本发明提供了种内置式恒压保护结构部件，在PCB板的两面分别设置绝缘弹性部件，绝缘弹性部件上开有至少个穿孔，PCB板包括基板、电压转换器、保护IC、电感、二极管、第电阻(R1)、第二电阻(R2)、第三电阻(R3