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Parallel direct hanging control method for multi-branch power battery system

A power battery and control method technology, applied in battery/fuel cell control devices, battery circuit devices, battery/battery traction, etc., can solve problems such as inrush current damage to lines and batteries, safety hazards, etc., and achieve a perfect software control strategy Effect

Pending Publication Date: 2022-04-05
CRRC ZIYANG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve the balance of each branch, the power batteries of each branch should be connected in parallel. The traditional parallel connection scheme is easy to generate inrush current, damage the circuit and battery, and cause safety hazards.

Method used

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  • Parallel direct hanging control method for multi-branch power battery system
  • Parallel direct hanging control method for multi-branch power battery system
  • Parallel direct hanging control method for multi-branch power battery system

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Embodiment Construction

[0053] All features disclosed in all embodiments in this specification, or steps in all implicitly disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined and / or extended and replaced in any way.

[0054] like Figure 1 to Figure 12 As shown, a parallel direct connection control method for a multi-branch power battery system includes the steps of: comparing the voltage of each branch power battery and calculating the voltage difference of each branch power battery before the parallel connection of power batteries, and then based on each branch The comparison results of the power battery and the calculation results of the power battery pressure difference of each branch are used for parallel direct connection control in various working conditions.

[0055] In an optional embodiment of the present invention, it includes the step of: comparing the calculation result of the power battery pressure difference of each branch with the set t...

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Abstract

The invention discloses a parallel connection and direct connection control method for a multi-branch power battery system, and the method comprises the steps: comparing the voltage of each branch power battery and calculating the voltage difference of each branch power battery before the parallel connection and direct connection of power batteries; then, parallel direct hanging control of various working conditions is carried out based on the comparison result of the power of the power batteries of the branches and the calculation result of the voltage difference of the power batteries of the branches; according to the method, multi-branch energy division is achieved, impact-free direct hanging control is achieved, no large circulation is generated, a perfect software control strategy is provided, and parallel direct hanging of all working conditions is achieved.

Description

technical field [0001] The present invention relates to the technical field of new energy shunting locomotives, and more specifically, relates to a control method for parallel connection and direct connection of a multi-branch power battery system. Background technique [0002] The existing technology generally uses a single-branch power battery for traction power supply, and some multi-branch power battery systems use diodes in parallel. Although this method does not generate circulating currents, the balance of each branch is poor. [0003] In order to achieve energy division and improve the safety of the power battery system, the locomotive needs to use a power battery system with multiple branches. In order to achieve the balance of each branch, the power batteries of each branch should be connected in parallel. The traditional parallel connection scheme is easy to generate inrush current to damage the circuit and battery, and cause safety hazards. Contents of the inve...

Claims

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Application Information

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IPC IPC(8): B60L58/12B60L58/18B60L50/64H02J7/34
CPCY02T10/70H02J7/34B60L58/12B60L50/64B60L58/18H02J7/00B60L58/22
Inventor 李茹华王永杨波马晓媛冯坷欣邓伯勇
Owner CRRC ZIYANG CO LTD
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