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Battery pack series-parallel switching control system and charge and discharge control method thereof

A control system and battery pack technology, applied to battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as power loss, low charging voltage, unfavorable fast charging, and loss, so as to avoid loss, speed up charging, and improve safe effect

Inactive Publication Date: 2013-04-17
王奉瑾 +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] Under normal circumstances, multiple battery packs of electric vehicles are charged and discharged in parallel, especially when charging, taking a 48V power supply battery pack as an example, the maximum charging voltage is 57.5V, and the maximum output voltage of the battery charger is 57.5V, so that It is necessary to rectify and reduce the voltage of the AC before it can be output to charge the battery pack. The low charging voltage is not conducive to fast charging, and it will also be accompanied by loss during the rectification and step-down process, resulting in the loss of electric energy.

Method used

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  • Battery pack series-parallel switching control system and charge and discharge control method thereof
  • Battery pack series-parallel switching control system and charge and discharge control method thereof

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Embodiment Construction

[0020] A further detailed description will be made below in conjunction with the accompanying drawings and embodiments of the present invention:

[0021] like figure 1 -2, a series-parallel switching control system between battery packs, including a series switch module 1 for realizing the series connection between the battery packs and a parallel switch module 2 for realizing the parallel connection between the battery packs, the series switch module 1 includes a number of series controllable switches 11 sequentially connected between the negative pole of the current battery pack and the positive pole of the lower battery pack, and a series switch drive unit 12 for driving the series controllable switch 11 to be turned on or off. The switch module 2 includes several parallel controllable positive electrode connection switches 21 sequentially connected between the positive pole of the current battery pack and the positive pole of the lower battery pack, and several parallel co...

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Abstract

The invention discloses a battery pack series-parallel switching control system and a charge and discharge control method thereof. The battery pack series-parallel switching control system comprises a controller, a series switch module and a parallel switch module, wherein the series switch module is used for realizing series connection of battery packs, and the parallel switch module is used for realizing parallel connection of battery packs. The invention aims to only control a series controllable switch to be turned on, or only control a parallel controllable anode connection switch or a parallel controllable cathode connection switch to be turned on at the same time. The switching between series connection and parallel connection of battery packs is realized as required, and better charge and discharge effects are achieved.

Description

[technical field] [0001] The present invention relates to the field of electric vehicle power lithium battery management systems, in particular to a series-parallel switching control system between battery packs and a charging and discharging control method thereof. [Background technique] [0002] Under normal circumstances, multiple battery packs of electric vehicles are charged and discharged in parallel, especially when charging, taking a 48V power supply battery pack as an example, the maximum charging voltage is 57.5V, and the maximum output voltage of the battery charger is 57.5V, so that It is necessary to rectify and reduce the voltage of the AC before it can be output to charge the battery pack. The low charging voltage is not conducive to fast charging. During the rectification and step-down process, it will also be accompanied by loss, resulting in the loss of electric energy. [0003] Therefore, it is necessary to solve the above problems. [Content of the inven...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 王奉瑾
Owner 王奉瑾
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