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Charging device and method

A technology of a charging device and a charging method, which is applied to secondary battery charging/discharging, secondary battery repair/maintenance, etc., and can solve problems such as inconsistent battery packs and unbalanced battery capacity

Active Publication Date: 2008-06-25
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when using such a charging device, due to the large or small differences of each battery, this will inevitably cause the capacity of a single battery in the battery pack to be unbalanced, and then the capacity of each battery pack will be inconsistent within its life cycle.

Method used

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  • Charging device and method
  • Charging device and method
  • Charging device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment one: see figure 1 , a charging device for an electric vehicle battery pack, comprising a series fast charger 161, a main manager 162, a plurality of equalizing chargers 1, 2, 3...80 and a plurality of equalizing managers 81, 82, 83 ...160. The output terminals of the series fast charger 161 are connected to the two power terminals of the battery packs BT1, BT2, BT3, BT4...BT80 connected in series to charge the battery packs BT1, BT2, BT3, BT4...BT80; the main The control terminal of the manager 162 is connected to the series fast charger 161, and the series fast charger (161) receives the shutdown control signal from the main manager 162; each equalizing charger 1, 2, 3...80 The output terminal and the two monitoring terminals of each equalizing charge manager are connected to the two power supply terminals of one of the batteries, and the control end of the equalizing charge manager is connected to the control of the equalizing charger 1, 2, 3...80 end. T...

Embodiment 2

[0017] Embodiment 2: The difference from Embodiment 1 is that: the two power terminals of each battery are respectively connected to the monitoring terminal of the main manager 162 .

[0018] The difference in its working principle is as follows: the main manager 162 monitors the voltage of each battery cell of the battery pack BT1, BT2, BT3, BT4... BT80 to ensure that the battery pack BT1, BT2, BT3, BT4... The voltage of each battery of BT80 is not fully charged. When the main manager 162 measures that one of the batteries is full, the main manager 162 communicates with other equal charge managers through the bus, and the main manager 162 sends a control signal to shut down the battery. Turn on the series charger, and at the same time, the equalizing charge manager sends a start signal to the corresponding charger to start the equalizing charger.

Embodiment 3

[0019] Embodiment three: as Figure 3 to Figure 4 As shown, a charging method includes the following steps: 1) each equalizing charge manager 81, 82, 83...160 collects the charging voltage of each single battery, 2) judges the charging voltage of any battery BT1, BT2, BT3, BT4 ...Whether BT80 is full, 3a) if it is full, the main manager 162 sends a shutdown signal, and the series fast charger 161 is disconnected; at the same time, the equalization charge managers 81, 82, 83...160 send a start signal to start Equalizing charger, 3b) If it is not fully charged, return to step 1), 4) Continue equalizing for a period of time, 5) Equalizing manager 81, 82, 83...160 sends a control signal to disconnect the equalizing charger 1, 2, 3...80.

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PUM

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Abstract

This invention discloses a charger and charging method, which contains series connected quick charger, main manager, plurality of uniform chargers and uniform charge managers, wherein every output terminal of uniform charger and two monitor terminals of every uniform charge manager connected with two ends of one battery, the control end of manager connected with that of charger, main manager connected with each uniform charge manager to obtain the start communication information, the control end of main manager connected with series connected quick charger for control the on / off of charger. Said invention can keep quick and uniform electricity charge.

Description

technical field [0001] The invention relates to a charging device and a charging method thereof, in particular to a charging device and a charging method thereof for an electric vehicle battery pack. Background technique [0002] At present, in the existing battery pack products, the method of fast charging in series is usually adopted, that is, the battery pack is charged by a series fast charger, and the series fast charger includes a series charging current regulating device, and the device includes a control button and the regulating circuit, the control end of the control button is connected to the input end of the regulating circuit, and the magnitude of the charging current can be adjusted manually or automatically. [0003] However, when using such a charging device, due to the large or small difference of each battery, it will inevitably cause the unbalanced capacity of the single battery of the battery pack, and then make the capacity of each battery pack inconsist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44
CPCY02E60/12Y02E60/10
Inventor 张建华张金涛
Owner BYD CO LTD