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Electric quantity balancing method and system for battery pack

A balancing method and technology of balancing system, applied in charge balancing circuit, battery circuit device, arrangement of multiple synchronous batteries, etc., can solve the problems of slow battery balancing efficiency, increasing battery life time, affecting battery performance, etc. Achieve the effect of balancing power, improving performance and improving efficiency

Inactive Publication Date: 2017-07-25
SUNWODA ELECTRONICS
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AI Technical Summary

Problems solved by technology

[0002] The battery pack is composed of several single cells (hereinafter referred to as batteries) connected in series or in parallel. Due to the inconsistent characteristics of battery voltage, internal resistance, and power, the power of some batteries decays too quickly during the charging and discharging process, resulting in the entire battery pack being the most attenuated. The service time of the fast battery is the same, that is, the barrel effect appears. In order to solve the above problem, that is, to increase the service time of the battery pack, a balancing circuit is generally used to balance the power of the batteries in the battery pack, which is affected by the volume and cost of the battery pack. , generally multiple batteries or all batteries in the battery pack share a balancing circuit, so the quality of the balancing method directly affects the power balancing efficiency, and then affects the performance of the battery pack. In the existing balancing methods, the efficiency of power balancing Slower, seriously affecting the performance of the battery pack

Method used

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  • Electric quantity balancing method and system for battery pack
  • Electric quantity balancing method and system for battery pack
  • Electric quantity balancing method and system for battery pack

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Embodiment Construction

[0036] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] refer to figure 1 According to an embodiment of the present invention, a method for equalizing battery capacity of a battery pack includes the following steps:

[0038] S1. The control system calculates the power of each battery in the battery pack in real time.

[0039] S2. Select the first battery to transfer power to the second battery, and use a heuristic search algorithm to search for the shortest path of power transfer between the first battery and the second battery.

[0040] S3. Using the shortest path to transfer the electric power of the first battery to the second battery.

[0041] In this embodiment, by calculating the power of the batteries in the battery pack, the first battery is selected to transfer power to the second battery, and a heuristic search algorithm is used to search the shortest pa...

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Abstract

The invention reveals an electric quantity balancing method and system for a battery pack, and the method comprises the steps: enabling a control system to calculate the electric quantity of each battery of the battery pack in real time; selecting the first battery for transferring the electric quantity to the second battery, and searching the shortest path for the electric quantity transfer between the first battery and the second battery through a heuristic search algorithm; and transferring the electric quantity of the first battery to the second battery through the shortest path. The method searches the shortest path for the electric quantity transfer between the first battery and the second battery through the heuristic search algorithm, greatly improves the efficiency through the directed searching, achieves the quick transfer of electric quantity from the battery with the higher electric quantity to the battery with the lower electric quantity, balances the electricity quantity in the battery pack, and improves the performance of the battery pack.

Description

technical field [0001] The invention relates to the field of power balance of battery packs, in particular to a method and system for power balance of battery packs. Background technique [0002] The battery pack is composed of several single batteries (hereinafter referred to as batteries) connected in series or in parallel. Due to the inconsistent characteristics of battery voltage, internal resistance, and power, the power of some batteries decays too quickly during the charging and discharging process, resulting in the entire battery pack being the lowest attenuation. The service time of the fast battery is the same, that is, the barrel effect appears. In order to solve the above problem, that is, to increase the service time of the battery pack, a balancing circuit is generally used to balance the battery power in the battery pack, which is affected by the volume and cost of the battery pack. , generally a plurality of batteries or all batteries in the battery pack use ...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0014
Inventor 徐智慧易行云袁佑诗
Owner SUNWODA ELECTRONICS
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