Method, system and vehicle for preventing power interruption caused by power battery CAN communication loss
A CAN communication and power interruption technology, which is applied in electric vehicles, vehicle parts, vehicle energy storage, etc., can solve problems such as power interruption, deep battery power feeding, and impact on driver's life and property safety, so as to avoid power interruption of the whole vehicle , The effect of battery safety improvement
Active Publication Date: 2022-07-01
深蓝汽车科技有限公司
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Problems solved by technology
If its communication is lost, inappropriate handling measures may cause power interruption during driving, or deep battery power feeding, affecting the driver's life and property safety
Method used
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Embodiment Construction
[0032] The present invention will be further described below in conjunction with the accompanying drawings.
[0033] In the present embodiment, a method for preventing power interruption caused by the loss of CAN communication of a power battery, includes the following steps:
[0034] (1) Divide the vehicle speed into a plurality of vehicle speed segments in turn, and the maximum speed limit values of different vehicle speed segments are different.
[0035] like figure 1 As shown, in this embodiment, the vehicle speed is divided into three speed segments: 0-30km / h, 30km / h-60km / h, and above 60km / h; when the current vehicle speed is less than or equal to 30km / h, the maximum speed limit value=30km / h; when the current vehicle speed is greater than 30km / h, the maximum vehicle speed limit value=max (current vehicle speed, 60km / h).
[0036] (2) The effective battery power is divided into a plurality of power intervals in turn, and the motor drive power limit values are differe...
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The invention discloses a method, a system and a vehicle for preventing power interruption caused by CAN communication loss of a power battery. It is divided into multiple power ranges, and the motor drive power limit values are different in different power ranges; according to the maximum vehicle speed limit value and the current vehicle speed, the motor maximum drive torque limit value A under the current maximum vehicle speed limit is calculated; according to the motor drive power limit value, The motor speed and motor efficiency calculate the maximum motor drive torque limit value B under the current motor drive power limit value; according to the motor maximum drive torque limit value A and the motor maximum drive torque limit value B, the driver demand torque is limited to obtain the motor drive torque demand. The present invention formulates different processing measures for different usage scenarios, thereby greatly improving driving safety and battery safety.
Description
technical field [0001] The invention belongs to the technical field of pure electric vehicles, and in particular relates to a method, a system and a vehicle for preventing power interruption caused by the loss of CAN communication of a power battery. Background technique [0002] Affected by the energy crisis, environmental pollution and greenhouse effect, new energy vehicles, especially pure electric vehicles, will become an inevitable trend. Pure electric vehicles have the advantages of energy saving, environmental protection, strong power, simple structure, etc., and are widely concerned by scientific research institutions and enterprises. [0003] Power battery is the power source of pure electric vehicle. The CAN communication of power battery includes critical signals such as battery power, maximum charging power and maximum discharging power. The drive system limits the driving torque and energy recovery torque according to these signals. If its communication is lost...
Claims
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IPC IPC(8): B60L3/00B60L58/14B60L15/20
CPCB60L3/0046B60L58/14B60L15/20B60L2240/423B60L2240/12B60L2240/421Y02T90/16
Inventor 刘小俊夏永光李宗华严钦山杨官龙
Owner 深蓝汽车科技有限公司