Battery pack charging and discharging management system and method

A charging and discharging management and battery pack technology, applied in secondary battery charging/discharging, battery circuit devices, safety/protection battery circuits, etc., can solve problems such as inconsistency in battery degradation

Active Publication Date: 2018-08-14
刘铭新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention solves the problem that in the existing charging / discharging management system, the use of equalization technology cannot effectively solve the problem of inconsistency caused by battery degradation

Method used

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  • Battery pack charging and discharging management system and method
  • Battery pack charging and discharging management system and method
  • Battery pack charging and discharging management system and method

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specific Embodiment approach 1

[0033] Specific Embodiments 1. The charging / discharging management method of the battery pack described in this embodiment adopts a multi-stage, intermittent charging or discharging method;

[0034] In the charging method, a progressive charging method is adopted, different charging conditions are set at each stage, and the condition of monitoring and judging the state of each unit battery is used as a condition, so that all unit batteries are as synchronized as possible and fully charged;

[0035] In the discharge method, a progressive discharge method is adopted, different discharge conditions are set at each stage, and the condition of monitoring and judging the state of each unit battery is used, so that all unit batteries are synchronized as much as possible and reach the state of being discharged.

[0036] The switching time between adjacent stages is less than 10ms, and the optimal value is less than 5ms.

[0037] The charging or discharging duration of each stage is be...

specific Embodiment approach 2

[0039] Specific Embodiment 2. The battery pack charging / discharging management method described in this embodiment is a specific case of the battery pack charging / discharging management method described in Specific Embodiment 1. The battery pack charging / discharging management method described in this embodiment Method During the charging or discharging process, the number of unit cells maintained online is a fixed value n, and the number of unit cells offline is x, where n+x is the total number of unit cells contained in the battery pack;

[0040] In the charging method, in each stage, the terminal voltages of all unit cells in the battery pack are monitored in real time. When the average variation of the terminal voltages of the n unit cells online exceeds y, the charging at this stage is stopped, and the n unit cells online are The i unit cells with the highest voltage among the unit cells are cut off, and then the i unit cells with the lowest voltage among the offline x uni...

specific Embodiment approach 3

[0047] Specific Embodiment 3. The battery pack charging / discharging management method described in this embodiment is a specific case of the battery pack charging / discharging management method described in Specific Embodiment 1. The battery pack charging / discharging management method described in this embodiment In the method, the threshold of each stage is the terminal voltage threshold of the unit battery, and at the beginning of each stage, the unit battery that is cut into the line must be selected according to the threshold of the stage, and the corresponding charging or charging should be adjusted according to the total number of online unit batteries. Discharge voltage, specifically:

[0048] In the charging method, the threshold value of each stage is increased sequentially, and the maximum threshold is the terminal voltage when the unit battery is fully charged; at the beginning of each stage, all the unit batteries with terminal voltages less than the threshold value ...

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Abstract

A battery pack charging and discharging management system and a method thereof relate to charging and discharging control technology of storage batteries and belong to the technical field of control for storage batteries, for solving the problem that the adoption of the equalization technology in the existing charge and discharge management system still cannot effectively solve the problem of inconsistency caused by the deterioration of the battery. The management method adopts a multi-stage, intermittent charging or discharging method. In the charging / discharging process, a progressive charging method is adopted, different charging / discharging conditions are set in each stage, and the conditions are switched to the next stage until the condition is reached until the conditions of the laststage are satisfied. The switching time between adjacent stages is less than 10ms, and the charging / discharging duration of each stage is between 20 and 100s. The management system includes a switching control device for switching the unit cells and a bidirectional direct current converter for adjusting the charging / discharging circuit voltage. The invention overcomes bias in the prior art, ensures that each unit cell in the battery pack is fully charged or vented, and is capable of saving energy.

Description

technical field [0001] The invention relates to the charging / discharging control technology of storage batteries, belonging to the technical field of storage battery control. Background technique [0002] As a kind of electric energy storage device, the battery pack must be used as a battery pack after being connected in series because the voltage provided by the single battery is much lower than the power supply voltage requirement of the load equipment. Such as figure 1 shown [0003] Since all battery cells in the battery pack are directly connected in series, the charging / discharging currents of the series connected battery cells are exactly the same, and all the battery cells can be charged and discharged at the same time at the same time. Ideally, the voltages of the single cells are equal, so the charging / discharging voltage of the battery pack is the voltage of the single cells * the number of single cells; but in the actual use environment, due to the inconsistenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH01M10/441H01M2010/4271H02J7/0019H02J7/0026Y02E60/10
Inventor 刘铭新
Owner 刘铭新
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