Battery system capable of being separated from vehicle body, control method of battery system and new energy vehicle

By designing a battery system that can be separated from the vehicle body in a new energy vehicle, and using a low-voltage battery module and a DCDC module to drive the vehicle power module, the problem of insufficient power when the high-voltage battery is disengaged and the vehicle cannot be disengaged after disengagement in the prior art is solved, and the effect of safely disengaged and away from the high-voltage battery pack is achieved.

CN119659336APending Publication Date: 2025-03-21WANXIANG 123 CO LTD
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Patent Information

Application Number
CN202411937199.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

In the prior art, the power of the power battery comes from the power battery itself. When thermal runaway occurs, the probability of the battery failure is high, and it cannot provide power for the lock mechanism. The escape action is high after the disengagement is completed. Moreover, the vehicle cannot be further away after the out-of-control battery is disengaged, and there is still a certain risk.

Method used

A battery system that can be separated from the vehicle body is designed, including a high-voltage battery module, a low-voltage battery module, a DCDC module, a lock-out mechanism and a BMS system. The status of the high-voltage battery module is monitored through the BMS system, and the high-voltage signal is cut off when the escape strategy is triggered. The lock-out mechanism is controlled to disengage the high-voltage battery module, and the low-voltage battery module and the DCDC module drive the driving module to power the vehicle, so that the vehicle can be away from the falling high-voltage battery pack.

Benefits of technology

Powered by low-voltage batteries, the safe separation of high-voltage batteries can be achieved, the risk of heat spreading is reduced, the safety of vehicles and personnel is ensured, and after disengagement, the vehicle can travel a distance away from the high-voltage battery pack, reducing the losses of the entire vehicle.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention discloses a battery system capable of being separated from a vehicle body, a control method of the battery system and a new energy vehicle, the battery system comprises a high-voltage battery module, a low-voltage battery module, a DCDC module, an unlocking mechanism, a driving module and a BMS system, the DCDC module is electrically connected with the low-voltage battery module and the high-voltage battery module, the low-voltage battery module is electrically connected with the unlocking mechanism, and the driving module is electrically connected with the BMS system. The high-voltage battery module is electrically connected with the driving module, and the BMS system is electrically connected with the low-voltage battery module, the DCDC module, the unlocking mechanism, the driving module and the high-voltage battery module. When dangerous situations such as battery thermal runaway occur, the low-voltage battery can cut off connection between a high-voltage battery power source and a vehicle body through the unlocking mechanism, meanwhile, electric power is provided for separation of the high-voltage battery, the risk of heat spreading is greatly reduced, the safety of the vehicle and personnel is guaranteed, in addition, the low-voltage battery can further provide electric power for the driving module, and the safety of the vehicle is improved. And the vehicle keeps power after the high-voltage battery is cut off, so that the risk is further reduced.
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