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Battery pack parallel charging device and parallel charging method thereof

A technology of a charging device and a charging method, which is applied to battery circuit devices, secondary battery charging/discharging, circuit devices, etc., can solve problems such as large circulating currents in parallel charging of battery packs, and achieves reduction of circulating currents between battery packs, reliable operation, and high reliability. Ensure the effect of safe charging

Active Publication Date: 2012-05-30
BYD CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The invention provides a battery pack parallel charging device and a parallel charging method thereof which are reliable in operation and reduce the circulating current between battery packs in order to solve the technical problem of relatively large circulating currents when the existing battery packs are charged in parallel.

Method used

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  • Battery pack parallel charging device and parallel charging method thereof
  • Battery pack parallel charging device and parallel charging method thereof
  • Battery pack parallel charging device and parallel charging method thereof

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Embodiment Construction

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] figure 1 For the structural block diagram of an embodiment provided for the battery pack parallel charging device of the present invention, refer to figure 1 , the battery pack parallel charging device includes n groups of charging branches 1, the n groups of charging branches 1 include the first charging branch (including battery pack 1 and switch k1), the second charging branch (including battery pack 2 and switch K2), the third charging branch (including battery pack 3 and switch K3), ..., the nth charging branch (including battery pack n and switch Kn) are co...

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Abstract

A battery pack parallel charging device comprises n groups of charging branches, a power module and a battery manager. The charging branches are connected parallelly, each charging branch consists of a battery pack and a switch which are serially connected, and n is the number of the branches of the charging branches; the power module is respectively connected with the switches of the charging branches; and the battery manager is respectively connected with the battery packs and the switches of the charging branches, is used for acquiring voltage of the battery packs in the charging branches, and controls the switches in the corresponding charging branches to be sequentially switched on according to the voltage of the battery packs in the charging branches from low to high. The shortcoming that high ring current is generated among existing battery packs when the existing battery packs are parallelly charged, harmful effects on the existing battery packs and devices in branches are generated, and the existing battery packs and the devices can even be damaged is overcome. By the aid of the battery pack parallel charging device, ring current among the battery packs is greatly reduced, and accordingly safety charging of the battery packs is guaranteed.

Description

technical field [0001] The invention relates to the field of energy storage battery packs, in particular to a battery pack parallel charging device and a parallel charging method thereof. Background technique [0002] The battery pack is the energy carrier of electric vehicles and a key component that affects the performance of electric vehicles. The battery pack is composed of batteries. Due to the limitations of the characteristics of the battery materials, the current battery pack voltage will not be very high. With the development of the industry, the voltage required by industry is getting higher and higher. To solve the problem of low battery power supply voltage, it is natural to think of methods such as series and parallel connection of battery packs. The purpose of series connection is to increase the voltage of the battery, while parallel connection The purpose is to increase the capacity of the battery and increase the output current. [0003] When multiple batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/12Y02E60/10
Inventor 刘宇沈晓峰张建华
Owner BYD CO LTD
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