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Flexible control method and device for dynamically reconstructing battery module

A battery module and dynamic reconfiguration technology, which is applied to battery circuit devices, circuit devices, secondary batteries, etc., can solve problems such as the inability to solve the consistency of module units, and achieve the effect of ensuring performance consistency

Pending Publication Date: 2021-11-12
北京宝龙德科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem of consistency of module units existing in series battery modules applied in high-voltage scenarios that cannot be solved by existing dynamic reconfiguration technology

Method used

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  • Flexible control method and device for dynamically reconstructing battery module

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Embodiment approach 1

[0035] Implementation Mode 1, see figure 1 Describe this embodiment. This embodiment is a flexible charging / discharging control method for dynamically reconfigured battery modules. The battery module is a series battery module composed of n module units connected in series. The i-th module The unit is composed of Ni+Xi battery units connected in series, i=1, 2, 3,...n, and the charging / discharging control method includes:

[0036] During the charging / discharging process, Nx and Xx in each series module unit are dynamically iteratively adjusted, and each iteration adopts the method of synchronous equivalent reverse redundant quantity to adjust the module unit with the highest terminal voltage and the lowest terminal voltage module unit;

[0037] Iterations continue until all modules are filled / emptied.

[0038]The difference between the flexible charging / discharging control method described in this embodiment and the prior art is that in the charging / discharging process, the ...

Embodiment approach 2

[0049] Embodiment 2. This embodiment is a further limitation of the flexible charging / discharging control method for a dynamically reconfigured battery module described in Embodiment 1. The said each iteration adopts a synchronous equivalent reverse redundant quantity The process of adjusting the module unit with the highest terminal voltage and the module unit with the lowest terminal voltage is as follows:

[0050] Ni=Ni-j of the modular unit with the highest terminal voltage, and Xi=Xi+j at the same time;

[0051] Ni=Ni+j of the modular unit with the lowest terminal voltage, and Xi=Xi-j at the same time;

[0052] j=1 or 2.

[0053] During the charge and discharge process, according to the set time period, according to the virtual voltage value of the series module monomer, the Nx and Xx of the two series module monomers with the highest and lowest voltage values ​​are dynamically adjusted, and the adjustment configuration adopts Synchronous equivalent reverse redundant qu...

Embodiment approach 3

[0060] Embodiment 3. This embodiment is a further limitation of the flexible charge / discharge control method for a dynamically reconfigurable battery module described in Embodiment 1 or 2. In this embodiment, when the first charge / discharge ends, a step is added :

[0061] At the end of each charge / discharge, for the first w group of module units with the highest virtual voltage value Ni=Ni+1, and corresponding Xi=Xi-1, this parameter will be used as the next Startup parameters for the charge / discharge process.

[0062] In this embodiment, at the end of charging / discharging, the parameters of the first w group of module units with the highest virtual voltage among the module units are adjusted, and the adjusted parameters are used as the starting parameters for the next charging / discharging, so that the next The initial state of one charge and discharge is more suitable for the state of the battery module itself, which improves the charging efficiency of the next charge and a...

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Abstract

The invention discloses a flexible control method and device for dynamically reconstructing a battery module, relates to a battery pack control technology, and aims to solve the problem that an existing dynamic reconstruction technology cannot solve the problem of module unit consistency existing in a series battery module applied to a high-voltage scene. The battery module is a series battery module formed by connecting n module units in series, wherein the ith module unit is formed by connecting Ni+Xi battery units in series. The charging / discharging control method comprises the following steps: in a charging / discharging process, performing dynamic iteration adjustment on Nx and Xx in each series module unit; in each iteration, adjusting the module unit with the highest virtual voltage and the module unit with the lowest virtual voltage in a synchronous equivalent reverse redundancy number mode; for the series module single body with the highest virtual voltage value, increasing the Nx while reducing the Xx; for the series module single body with the lowest virtual voltage value, reducing the Nx while increasing the Xx; and continuously carrying out iteration until all module units are fully charged / emptied. The method is suitable for charging and discharging control of the battery module.

Description

technical field [0001] The invention relates to battery module control technology. Background technique [0002] The battery module is a battery system composed of multiple fixed single-battery connections. The charging / discharging voltage of the battery module is fixed at the number of batteries connected in series x battery single-cell voltages. Influenced by the range, the battery module voltage is charged / discharged within a wide range, which ultimately leads to low operating efficiency and complicated control of the battery system. [0003] In the existing technology, in order to ensure the corresponding effectiveness of the battery module control speed, the number of cells connected in series in the battery module is dynamically reconfigured. Multiple modules in series can meet the requirements of high-voltage and large-capacity battery modules, and dynamic reconfiguration technology can be used to solve the consistency problem of module units in series-connected modu...

Claims

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Application Information

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IPC IPC(8): H01M10/44H02J7/00
CPCH01M10/441H02J7/0068Y02E60/10
Inventor 刘铭新
Owner 北京宝龙德科技有限责任公司
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