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Intelligent balance device of power batteries of electric vehicle

A technology for power batteries and electric vehicles, which is applied in electric vehicles, battery circuit devices, circuit devices, etc., can solve the problems of shortening the life of the battery pack and reducing the capacity of the battery, and achieves large balanced current, increased capacity, and small loss. Effect

Active Publication Date: 2013-09-18
HANGZHOU EV TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that if the single cells in the battery pack are unbalanced, the capacity of the entire battery pack will be greatly reduced.
If this state is not improved, the life of the battery pack will be greatly shortened

Method used

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  • Intelligent balance device of power batteries of electric vehicle
  • Intelligent balance device of power batteries of electric vehicle
  • Intelligent balance device of power batteries of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Below in conjunction with accompanying drawing, the present invention will be further described:

[0028] Such as figure 1 As shown, the electric vehicle power battery intelligent equalization device is composed of a sampling module 1, an intelligent control module 2, a drive module 3, and an equalization module 4.

[0029] The sampling module 1 is connected to the battery pack, and collects information such as voltage, temperature, connection status and battery pack current of each single battery in the battery pack;

[0030] The intelligent control module 2 is composed of a microcontroller, an input circuit and an output circuit. The input circuit is connected to the acquisition module, and the collected data is transmitted to the microcontroller. The output circuit is connected to the drive module, and the control signal of the microcontroller is transmitted to the drive. module, the control signal is a high-frequency PWM signal, which is applied to the power switch...

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Abstract

The invention relates to an intelligent balance device of power batteries of an electric vehicle. A sampling module is connected with a battery pack and is used for acquiring information such as voltage, temperature and the like of each single battery in the battery pack; an intelligent control module judges whether the charge state of each single battery is in a specified balance range when the battery pack is charged or discharged according to a sampling value of the sampling module; a control drive module is used for charging a low-voltage single battery or discharging a high-voltage single battery; a drive module is used for isolating and amplifying control signals output by the intelligent control module; and a balance module realizes energy exchange between the battery pack and the single batteries, and each single battery corresponds to one balance unit. The intelligent balance device provided by the invention can be used for carrying out active lossless balance on the power battery pack of the electric vehicle, has the advantages of large balance current, high efficiency and little loss, and can effectively and rapidly ensure that the battery pack with the single batteries of unbalance states reaches a batter balance state, thus the actual use capacity of the whole battery pack is increased, and the service life of the battery pack is prolonged.

Description

technical field [0001] The invention belongs to the field of active equalization of power battery packs of electric vehicles, in particular to an intelligent equalization device for power batteries of electric vehicles. Background technique [0002] Compared with traditional batteries, power lithium-ion batteries have higher energy mass density, energy volume density and power density, so they are more and more widely used. In the field of electric vehicle power batteries, lithium-ion batteries are considered to be the most promising power batteries due to their excellent performance. The current power lithium-ion battery has a single voltage of 3.2V and a capacity of tens of ampere-hours to hundreds of ampere-hours. In practical applications, lithium batteries are generally used in series or in parallel to provide more energy and greater power. Due to the inconsistency of parameters such as capacity and internal resistance in the manufacturing process of lithium-ion batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 梁一桥刘大亮倪斌
Owner HANGZHOU EV TECH CO LTD
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