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Bilaterally-driven battery charging relay safety control system and method

A battery charging and bilateral drive technology, applied in battery overcharge protection, battery circuit devices, electric vehicle charging technology, etc. Risk of overcharge and explosion, low cost of modification, and effect of improving safety performance

Pending Publication Date: 2021-07-23
HOZON NEW ENERGY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the patent is still only a simulation test of the BMS during the charging process, so when the BMS fails, the safety performance during the charging process is still not guaranteed
[0005] In addition, in the existing solution, only one relay is controlled by the BMS to cut off the charging circuit. Therefore, when the relay is not controlled, even if the BMS does not fail, the charging circuit cannot be cut off, which will also cause the battery pack to explode. ACCIDENT

Method used

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  • Bilaterally-driven battery charging relay safety control system and method
  • Bilaterally-driven battery charging relay safety control system and method
  • Bilaterally-driven battery charging relay safety control system and method

Examples

Experimental program
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Embodiment 1

[0048] refer to figure 1 , the present embodiment provides a bilaterally driven battery charging relay safety control system,

[0049] Including electric drive control module BMS, vehicle control module VCU, first relay 1, second relay 2, battery pack, charging pile;

[0050] The charging pile provides power for charging the battery pack;

[0051] The first relay 1 and the second relay 2 realize the on-off of the charging circuit;

[0052] The electric drive control module BMS and the vehicle control module VCU are respectively connected to both ends of the first relay 1, and a second relay 2 is arranged between the vehicle control module VCU and the first relay 1;

[0053] When an overcharging fault occurs in the battery pack, if the first relay 1 is in a normal state, the first relay 1 is cut off by the electric drive control module BMS or the vehicle control module VCU to stop charging; if the first relay 1 is in a fault state, Then, the second relay 2 is cut off by the ...

Embodiment 2

[0068] refer to Figure 7 , the present embodiment provides a bilaterally driven battery charging relay safety control method, based on the bilaterally driven battery charging relay safety control system described in Embodiment 1, comprising steps:

[0069] S1. Determine whether the first relay 1 is in a normal state, if so, proceed to step S2, otherwise proceed to step S6;

[0070] S2. Determine whether the electric drive control module BMS is faulty, if there is a fault, execute step S3, if there is no fault, execute step S4;

[0071] S3. The fault reporting module transmits the fault information to the vehicle control module VCU, and executes step S5;

[0072] S4. The first judging unit judges whether the battery pack has an overcharge failure. If so, the electric drive control module BMS cuts off the first relay 1 to stop charging and ends. If not, go back to step S1;

[0073] S5. The second judging unit judges whether the battery pack is overcharged. If so, the vehicle ...

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Abstract

The invention discloses a bilaterally-driven battery charging relay safety control system and method. The system comprises an electric driving control module BMS, a vehicle control module VCU, a first relay, a second relay, a battery pack and a charging pile, wherein the charging pile provides a power supply for charging the battery pack; the first relay and the second relay realize the on-off of the charging circuit; the electric driving control module BMS and the vehicle control module VCU are connected to the two ends of the first relay respectively, and the second relay is arranged between the vehicle control module VCU and the first relay; and when an overcharge fault occurs in the battery pack, if the first relay is in a normal state, the first relay is cut off through the electric driving control module BMS or the vehicle control module VCU to stop charging, and if the first relay is in a fault state, the second relay is cut off through the vehicle control module VCU to stop charging. The safety performance of the relay in the charging process of the new energy automobile is improved, and the change cost is low.

Description

technical field [0001] The invention belongs to the technical field of battery charging, and in particular relates to a safety control system and method for a battery charging relay driven by two sides. Background technique [0002] Due to the increasing scarcity of the world's oil resources and the environmental pollution caused by the emission of automobile exhaust, new energy vehicles have become the focus of research by various automobile manufacturers. Especially with the development of power batteries, electric vehicles have become a relatively common development direction. The pure electric vehicle has the advantages of low operating cost, zero emission, low noise, and can make full use of valley electricity. [0003] At present, the high-voltage architecture commonly used in new energy vehicle batteries is that a relay is arranged in the battery pack, and the work of the relay is controlled and driven by the battery pack controller BMS. When charging, there is a ri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60L53/60
CPCH02J7/00302B60L53/60Y02T10/70Y02T10/7072Y02T90/12
Inventor 李陈勇范大鹏薛国正杨慧萍邓晓光
Owner HOZON NEW ENERGY AUTOMOBILE CO LTD
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