Multi-branch parallel battery system and vehicle

By designing a multi-branch parallel battery system, the power distribution unit and BMS are used to achieve independent control of the battery branch, the problems of battery cell consistency and energy attenuation are solved, and the operation efficiency and battery life of commercial vehicles are improved.

CN119705120APending Publication Date: 2025-03-28SHANGHAI GUOXUAN NEW ENERGY CO LTD
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Patent Information

Application Number
CN202510057560.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-14
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In commercial vehicle battery systems, battery cells are difficult to ensure consistency, resulting in energy attenuation and mileage reduction, and battery failure affects operational efficiency.

Method used

A multi-branch parallel battery system is designed, including a power distribution unit PDU, a second BMS and an N-branch parallel battery branch. Each battery branch is equipped with a first BMS, a relay and a battery cell module, and independent charge and discharge and control are realized through a communication interface and a polarity interface.

Benefits of technology

It improves the consistency of the battery cell and charge and discharge energy, ensures that the vehicle can drive in a short time, does not affect normal operation, improves operating efficiency and extends the battery life.

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Abstract

The invention discloses a multi-branch parallel battery system and a vehicle, and relates to the technical field of new energy vehicles, the multi-branch parallel battery system comprises a power distribution unit PDU, a second BMS arranged in the power distribution unit PDU and N battery branches arranged in parallel; n + 1 communication interfaces are arranged on the power distribution unit PDU, all the communication interfaces are electrically connected with the second BMS, one communication interface is connected to the whole vehicle VCU, and the remaining N communication interfaces are connected to the N battery branches respectively; the power distribution unit PDU is provided with 2N polarity interfaces which are respectively connected to the positive / negative electrodes of the N battery branches; the power distribution unit PDU is provided with an output interface so as to output state information of the N battery branches. According to the multi-branch parallel battery system and the vehicle, the consistency, the charging and discharging energy and the operation efficiency of the battery cells are improved.
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