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Battery equalization strategy of hybrid power system and hybrid power vehicle

A battery balancing and hybrid technology, applied in the field of vehicles, can solve the problems that the hybrid system cannot carry out the battery, increase the battery balancing scene and balancing of the hybrid system, and achieve the increase of the battery balancing scene, the reduction of production consistency requirements, and the improvement of usage. effect of life

Pending Publication Date: 2022-01-14
东风汽车有限公司东风日产乘用车公司
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AI Technical Summary

Problems solved by technology

[0004] Based on the above problems, the present invention proposes a battery balancing strategy for a hybrid system and a hybrid vehicle, which solves the technical problem that the hybrid system cannot perform battery balancing in the prior art, and adopts the battery balancing strategy of the hybrid system provided by this embodiment The strategy greatly increases the battery balancing scenarios of the hybrid system, enables battery balancing to be fully carried out, and improves battery life

Method used

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  • Battery equalization strategy of hybrid power system and hybrid power vehicle
  • Battery equalization strategy of hybrid power system and hybrid power vehicle
  • Battery equalization strategy of hybrid power system and hybrid power vehicle

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings. It is only intended to describe the specific implementation of the present invention in detail, and does not impose any limitation on the present invention, and the scope of protection of the present invention shall be determined by the claims.

[0028] refer to figure 1 , the present invention proposes a battery balancing strategy for a hybrid system, including:

[0029] Step S001, if the voltage difference between the cell with the highest capacity and the cell with the lowest capacity in the battery pack is greater than the preset voltage difference, then further determine whether the remaining capacity of the cell with the highest capacity is greater than the preset remaining capacity;

[0030] Step S002, if the remaining power of the battery with the highest battery capacity is greater than the preset remaining power, the battery bal...

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Abstract

The invention provides a battery equalization strategy of a hybrid power system and a hybrid power vehicle. The battery equalization strategy comprises the steps that whether the residual electric quantity of a battery cell with the highest electric quantity is greater than a preset residual electric quantity or not is further judged if the voltage difference between the battery cell with the highest electric quantity and a battery cell with the lowest electric quantity in a battery pack is greater than a preset voltage difference; if the residual electric quantity of the battery cell with the highest electric quantity is larger than the preset residual electric quantity, the battery equalization action starts, during the battery equalization action, the hybrid power system judges whether a motor executes a power consumption action or a power generation action according to the voltage of the battery pack, and the power consumption action and the power generation action correspond to discharging and charging of the battery pack; and if the equalization ending condition is met, the battery equalization action is ended. The technical problem that the hybrid power system in the prior art cannot perform battery equalization is solved, the battery equalization scene of the hybrid power system is greatly increased by adopting the battery equalization strategy of the hybrid power system provided by the invention, the battery equalization can be fully performed, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a battery balancing strategy of a hybrid system and a hybrid vehicle. Background technique [0002] In the prior art, a vehicle using an electric system will balance the power of the lithium battery pack of the vehicle. The current balancing strategy is: when the power of the lowest battery cell in the battery pack is less than 30%, the battery pack in the lithium battery pack will be prohibited. The purpose is to avoid over-discharge of the lithium battery caused by the balance of electricity. Since the battery in the EV system of a pure electric vehicle is often fully charged, the balance condition is easy to meet and can protect the battery. The flow chart of the battery balance strategy in the prior art is as follows image 3 shown. [0003] But for a hybrid system, the battery needs to maintain a state that can accept braking energy recovery and power assist energy output, so the po...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0014H02J7/0025H02J7/0048H02J7/007182H02J7/0029
Inventor 迟帅陈少锋何旭阳季发举
Owner 东风汽车有限公司东风日产乘用车公司
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