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Bilaterally-driven battery charging relay safety control system and method
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A bilateral drive and battery charging technology, which is applied in battery overcharge protection, battery circuit devices, electric vehicle charging technology, etc., can solve problems such as inability to guarantee safety performance, reduce the risk of overcharging and explosion, and reduce the cost of modification. The effect of improving safety performance
Pending Publication Date: 2021-07-23
HOZON NEW ENERGY AUTOMOBILE CO LTD
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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
Method used
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Embodiment 1
[0040] refer to figure 1 , the present embodiment provides a bilaterally driven battery charging relay safety control system, including an electric drive control module BMS, a vehicle control module VCU, a relay, a battery pack, and a charging pile;
[0041] The charging pile provides power for charging the battery pack;
[0042] The relay realizes the on-off of the charging circuit;
[0043] The electric drive control module BMS and the vehicle control module VCU are respectively connected to both ends of the relay to realize bilateral driving of the relay;
[0044] When an overcharge failure occurs in the battery pack, the electric drive control module BMS or the vehicle control module VCU cuts off the relay to stop charging.
[0045] specific:
[0046] refer to figure 2 , 3 , In the traditional relay driving mode, the BMS can only control the high-side or low-side circuit driven by the relay, and the charging cannot be stopped when the BMS fails.
[0047] refer to ...
Embodiment 2
[0055] 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:
[0056] S1. Determine whether the electric drive control module BMS is faulty, if there is a fault, execute step S2, if not, execute step S3;
[0057] S2. The fault reporting module transmits the fault information to the vehicle control module VCU, and executes step S4;
[0058] S3. The first judging unit judges whether the battery pack is overcharged. If so, the electric drive control module BMS cuts off the relay to stop charging and ends. Otherwise, return to step S1;
[0059] S4. The second judging unit judges whether the battery pack is overcharged. If so, the vehicle control module VCU cuts off the relay to stop charging and ends. Otherwise, return to step S1.
[0060] specific:
[0061] In step S4, the second judging unit...
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Abstract
The invention discloses a bilaterally-driven battery charging relaysafety controlsystem and method. The system comprises an electric driving control module BMS, a vehicle control module VCU, a relay, a battery pack and a charging pile, wherein the charging pile provides a power supply for charging the battery pack; the relay realizes 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 relay correspondingly so as to achieve bilateral driving of the relay; and when the battery pack has an overcharge fault, the relay is cut off through the electric driving control module BMS or the vehicle control module VCU so as to stop charging. The safety performance of the relay in the charging process of the new energy automobile is improved. While the safety performance of the relay is improved, the scheme of the invention rarely changes the wire harness of the battery pack, only one wire harness is additionally arranged, and only one driving channel of the VCU is occupied, so that 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 controlsystem 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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