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Equalization control method of battery pack

A technology of equalization control and battery pack, applied in charge equalization circuit, arrangement of multiple synchronous batteries, secondary battery, etc., can solve problems such as inaccurate calculation of equalization information, achieve improved energy utilization rate, fast response speed, computing simple effect

Inactive Publication Date: 2020-03-13
江西恒动新能源有限公司
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if when calculating the balance information, only the voltage value is considered and the charge capacity of each single battery is not considered, it will lead to inaccurate calculation of the balance information

Method used

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  • Equalization control method of battery pack
  • Equalization control method of battery pack
  • Equalization control method of battery pack

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Embodiment Construction

[0026] Combine below Figure 1-3 The present invention is further described, but the protection scope of the present invention is not limited to the content.

[0027] For the sake of clarity, not all features of an actual embodiment are described. In the following description, well-known functions and constructions are not described in detail since they would obscure the invention with unnecessary detail and should be considered in the development of any actual embodiment. , a great deal of implementation detail must be worked out to achieve the developer's specific goals, such as changing from one embodiment to another in accordance with system-related or business-related constraints, and it should also be recognized that such development work may be complex and time-consuming Yes, but just routine work for those skilled in the art.

[0028] Take the passive equalization of lithium iron phosphate battery pack as an example.

[0029] Realized by the following scheme: a batte...

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Abstract

The invention discloses an equalization control method of a battery pack. The equalization of the battery pack is controlled through a preprocessing module, an equalization information calculation module based on the state of charge, an equalization information calculation module based on the voltage at a charging terminal and an equalization opening and closing control module. The method has theadvantages that an equalization control strategy takes the voltage and the state of charge of a battery as the equalization variables, because the voltage is used as the equalization variable, the voltage can be directly measured and obtained, the operation is simple, and the response speed is high; the fluctuation of the voltage in a working state is larger, so that the voltage cannot comprehensively measure the consistency of the battery; and meanwhile, the state of charge of the battery is used as the battery equalization variable, so that the dischargeable electric quantity of the batterycan be kept consistent, the energy utilization rate of the battery can be better improved, equalization is allowed to be started at the beginning of charging, and the equalization efficiency is improved.

Description

technical field [0001] The invention relates to an equalization control method of a battery pack, which belongs to the technical field of battery equalization. Background technique [0002] When lithium batteries are used in electric vehicles, energy storage systems and other fields, due to the limitation of the voltage and capacity of single batteries, they must be connected in series and parallel to form battery packs to increase the total voltage and capacity. Each single cell in the battery pack will inevitably produce inconsistencies, mainly due to the following two aspects: 1. Inconsistencies caused by the battery manufacturing process: This mainly refers to the inherent part of the inconsistency of the battery. As a chemical product, limited by factors such as materials and processes, there are certain inconsistencies when the battery leaves the factory. For example, different batches of battery raw materials may lead to certain inconsistencies in the chemical proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/44H02J7/00
CPCH01M10/4207H01M10/4257H01M10/441H02J7/0014H01M2010/4271H01M2010/4278Y02E60/10
Inventor 吴凯苏连旺程睿梁明华郑礼生
Owner 江西恒动新能源有限公司
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