Power battery monitoring method and system and electric vehicle
A power battery and electric vehicle technology, applied in electric vehicles, battery/fuel cell control devices, electrical devices, etc., can solve the problems of battery management system power supply, inability to monitor power batteries, and failure to ensure the safety of power batteries, etc., to achieve Energy-saving and safety-enhancing effects
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Embodiment 1
[0051] Embodiment 1 of the present application discloses a monitoring method for a power battery. The following combines figure 1 , to introduce Embodiment 1 of this application.
[0052] see figure 1, when the use state of the electric vehicle is switched to the stop state, the lead-acid battery in the electric vehicle will be powered off after a short delay, and the battery management system 102 will detect all The electric vehicle switches to the stop state, and sends a data message to the device 101 with voltage conversion function, and controls the voltage conversion device 101 to supply power to the battery management system 102 after a preset time, wherein the voltage of the power supply is the specified The voltage conversion device 101 converts the high voltage output by the power battery 103 to a target voltage, and after the preset time, uses the target voltage to supply power to the battery management system 102, so as to realize the power supply of the power batt...
Embodiment 2
[0055] Embodiment 2 of the present application discloses a monitoring method for a power battery. The following combines figure 2 Embodiment 2 of this application is introduced.
[0056] see figure 2 , a power battery monitoring method disclosed in Embodiment 2 of the present application, including:
[0057] Step 201: Obtain the state transition information of the electric vehicle through the battery management system;
[0058] The battery management system can obtain the use state of the electric vehicle, and when it detects that the use state of the electric vehicle has changed, it can obtain the state transition information of the electric vehicle;
[0059] The state transition information can be switching from driving state to stopped state, switching from charging state to stopping state, or switching from driving state to charging state, which is not limited here, and those skilled in the art can according to actual needs Make settings.
[0060] It should be noted ...
Embodiment 3
[0074] Embodiment 3 of the present application discloses a monitoring method for a power battery, which is combined below image 3 Embodiment 3 of this application is introduced. The third embodiment of the present application is introduced on the basis of the second embodiment of the present application, and the same or similar parts as the second embodiment of the present application will not be repeated.
[0075] For steps 301 to 303, refer to Embodiment 2 of this application.
[0076] Step 304: Detect abnormal information of the power battery through the battery management system, and adjust the timing cycle according to the abnormal information.
[0077] When the power battery detected by the battery management system has abnormal information, it is necessary to adjust the cycle of outputting the target voltage of the device with voltage conversion function, so as to improve the safety of the power battery.
[0078] As an implementation manner, when the battery manageme...
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