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Cascade utilization battery pack control method and system

A control method and technology for battery packs, which are applied in parallel conversion of batteries, battery circuit devices, arrangement of multiple synchronous batteries, etc. The effect of circular economy, improving product economy and improving utilization rate

Active Publication Date: 2018-07-27
蓝谷智慧(北京)能源科技有限公司
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AI Technical Summary

Problems solved by technology

The problem brought about by this is that as the usage time increases, the inconsistency of retired battery packs will quickly appear. Due to the direct use of series-parallel connection for charging and discharging, the inconsistency between different battery packs will further increase, and it will not be possible to fully Play the actual performance of the echelon battery pack

Method used

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  • Cascade utilization battery pack control method and system
  • Cascade utilization battery pack control method and system

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Embodiment Construction

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to make a clearer and clearer definition of the protection scope of the present invention.

[0034] Such as figure 1 Shown: A control method for cascading use of battery packs, the steps used are:

[0035] Step 1: Collect electrical data such as battery pack voltage, temperature, capacity and power;

[0036] Step 2: According to the electrical data and the requirements of the power conversion unit, judge whether to enter the discharge or charge mode, and enter the discharge mode to enter the next step;

[0037] Step 3: Compare the voltages of the first battery pack group and the second battery pack group. If the voltage of the first battery pack group is greater than that of the second battery pack group, the first battery pack...

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Abstract

The invention discloses a cascade utilization battery pack group control method and system. The method comprises the following steps: I, acquiring battery pack group electrical data; II, judging whether to enter a discharging or charging mode according to the electrical data, and entering the next step if the discharging mode is entered; III, comparing the voltage of the first battery pack group with the voltage of the second battery pack group, discharging the first battery pack group if the voltage of the first battery pack group is greater than the voltage of the second battery pack group,otherwise discharging the second battery pack group; IV, comparing the voltage of the first battery pack group with the voltage of the second battery pack group once again, and discharging the first battery pack group and the second battery pack group in parallel if the voltage of the first battery pack group is the same as the voltage of the second battery pack group; and V, when one of the firstbattery pack group and the second battery pack group is detected to be lower than a discharging threshold, terminating discharging of the group, and ending discharging of the battery pack groups tillthe other battery pack group is also detected to be lower than the discharging threshold. The system is provided with two battery pack groups which are connected in parallel.

Description

Technical field [0001] The invention relates to the technical field of power battery reuse, and in particular to a method and system for controlling battery packs in cascade utilization. Background technique [0002] With the large-scale implementation of new energy vehicles, retired power battery packs have gradually developed into a problem that cannot be ignored. If the decommissioned battery pack is not properly disposed of, it will cause large-scale pollution to the environment, which is not conducive to the sustainable development of new energy vehicles. [0003] The current treatment of decommissioned battery packs is basically direct disassembly and recovery of internal precious metal elements. In fact, some of the retired battery packs still have about 80% of the energy. Although they do not meet the requirements of electric vehicles, they can be applied to other products that meet the requirements to give full play to the value of the remaining energy. When the remaining...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0014H02J7/0024
Inventor 李鹏飞韩春虎
Owner 蓝谷智慧(北京)能源科技有限公司
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