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Device for equalizing charge of battery and method thereof

A battery balancing and charging device technology, applied in battery circuit devices, circuit devices, current collectors, etc., can solve the problems of energy loss, difficulty in popularization, and high failure rate, and achieve the effect of speeding up the balancing speed and reducing the energy consumption of charging

Inactive Publication Date: 2010-02-10
SHENZHEN HUIPU ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy transfer method is to transfer its energy to other lower voltage cells through the internal DC-DC (direct current) circuit when the voltage of a cell is too high. The conversion efficiency of this method depends on the DC-DC The efficiency and conversion algorithm of the conversion circuit, in extreme cases, if the energy of the first section of the battery needs to be transferred to the last section, almost all of its energy will be lost in the conversion circuit, and its circuit is complex and has a high failure rate, etc. Unfavorable factors also make it difficult to popularize the technology

Method used

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  • Device for equalizing charge of battery and method thereof
  • Device for equalizing charge of battery and method thereof
  • Device for equalizing charge of battery and method thereof

Examples

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] The present invention is mainly used for balanced charging of the battery. The battery to be charged, for example, can be a power lithium ion battery, which can contain one or more battery packs. In each battery pack, there are multiple batteries (single batteries) connected in series. .

[0029] see figure 1 and image 3 , image 3 The overall structure of the balanced charging device of the example of the present invention is shown, wherein the positive and negative poles of the main power supply 4 are respectively connected to a plurality of battery packs 1 connected in series (battery pack 1, battery pack 2 . . . , battery The positive and negative poles of the battery pack n) are used to charge the battery as a whole.

[0030] In order to achieve balanced charging, an auxiliary power supply 2 is set in the device...

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Abstract

The invention discloses a device for equalizing charge of a battery and a method thereof. The device is used for the charge of the battery comprising at least one battery pack. The battery pack is connected with a plurality of battery cells in series. The device comprises a main power supply used for the integral charge of the battery, an auxiliary power supply used for the compensating charge ofthe battery pack, a charge gating circuit used for connecting the auxiliary power supply to each battery cell in the battery pack in a gating manner, and a collection control circuit. The collection control circuit is used for collecting the voltage value of each battery cell in the battery pack and determining a to-be-equalized battery cell group according to a collection result. The to-be-equalized battery cell group comprises a battery cell in the battery pack or comprises two or more adjacent battery cells in the battery pack, and is used for controlling the charge gating circuit to connect the auxiliary power supply with the to-be-equalized battery cell group and controlling to adjust the voltage value output by the auxiliary power supply to be the charging voltage needed by the to-be-equalized battery cell group so as to charge the to-be-equalized battery cell group. The invention has low charge energy consumption and quick equalizing speed.

Description

technical field [0001] The invention relates to battery charging technology, in particular to a battery equalization charging device and method. Background technique [0002] Existing battery equalization techniques can be roughly divided into bypass method and energy transfer method. The bypass method is to add a bypass resistor to it when the voltage of a single cell is too high to release the excess energy and balance the overall voltage. This method is a complete energy loss type, and due to the bypass The heat generated by the circuit resistance cannot be applied to large-capacity batteries. This method is more common in small-capacity battery management systems, and the general bypass current is within 200mA. The energy transfer method is to transfer its energy to other lower voltage cells through the internal DC-DC (direct current) circuit when the voltage of a cell is too high. The conversion efficiency of this method depends on the DC-DC The efficiency and convers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 张诚王跃张海莹
Owner SHENZHEN HUIPU ENERGY TECH
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