Electric bicycle battery electrical scheme capable of accurately displaying electric quantity

The invention discloses an electric scheme of an electric bicycle battery capable of accurately displaying electric quantity, and aims to solve the problem that the electric quantity displayed by an instrument is inaccurate after an original lead-acid battery is replaced by a lithium battery by a user. Comprising a BMS module, a DCDC conversion module, a battery module and a connector, the BMS module has a communication function and is responsible for communicating with the DCDC conversion module, the DCDC conversion module has dormancy and wake-up functions and is communicated with the BMS module to convert battery electric quantity into voltage to be output, and the battery module is formed by connecting lithium batteries in series and in parallel. The two connectors are used for battery charging and discharging and instrument electric quantity display, the BMS module, the DCDC conversion module and the battery module are installed in the battery shell and fixed through screws, pressing plates or glue, and