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Battery pack parallel management method, use method and management system, subcontracting subsystem and energy storage system, electric vehicle

A management method and management system technology, which are applied in the fields of electric vehicles, usage methods and management systems, and battery pack parallel management methods, can solve problems such as over-discharge, energy utilization discount, and excessive battery loss, so as to reduce circulating current charging, The effect of prolonging the charging time and reducing the SOC discharge difference

Active Publication Date: 2022-06-28
苏州联胜新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because if you continue to discharge, you will also discharge 20% of the electricity, and the least 4# battery will be completely dead. If you continue to discharge, it will lead to over-discharge, which will cause a lot of battery loss.
But at most the battery still has 60% of the electricity not discharged, resulting in a greatly reduced energy utilization rate

Method used

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  • Battery pack parallel management method, use method and management system, subcontracting subsystem and energy storage system, electric vehicle
  • Battery pack parallel management method, use method and management system, subcontracting subsystem and energy storage system, electric vehicle
  • Battery pack parallel management method, use method and management system, subcontracting subsystem and energy storage system, electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A battery pack parallel management method is used for charge and discharge management after a plurality of battery packs are connected in parallel. In order to improve the power utilization rate when the battery packs are connected in parallel, refer to figure 1 , methods include:

[0059] S101: Acquire the identification information of each connected battery pack and the current SOC value;

[0060] S102: According to the SOC value of each battery pack, query the preset corresponding energy output level, and match the battery pack corresponding to each identification information with the energy output level corresponding to the query;

[0061] S103: According to each battery pack and the currently matched energy output level, calculate the maximum energy usage level supported by the output after the battery packs are connected in parallel, and feed back the maximum energy usage level to the load;

[0062] S104: Before each battery pack is unmatched with its respective...

Embodiment 2

[0090] A battery pack parallel management system can be understood as the central control terminal of parallel battery packs. refer to figure 2, the battery pack parallel management system includes a first processor and a first memory, the first memory stores an instruction set for the first processor to call to realize the management of parallel battery packs disclosed in the battery pack parallel management method in Embodiment 1 and control functions.

Embodiment 3

[0092] A method for using battery packs in parallel is applied to each battery pack that can be connected and used in parallel, and is used for controlling each battery pack itself. refer to image 3 , methods include:

[0093] Step S201: continuously and accumulatively obtain the charge and discharge currents after the parallel connection of the battery packs;

[0094] Step S202: Calculate the current SOC value of the battery pack and transmit it to the battery pack parallel management system by using the SOC energy calculation model, based on the accumulation of the charge and discharge current, and corrected by the temperature factor of the current battery pack and the full energy cycle attenuation factor;

[0095] Step S203: During parallel output, the battery pack parallel management system outputs the energy output level based on the battery pack SOC value matching, so that the battery pack and the parallel output sum of other parallel connected battery packs meet the e...

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Abstract

The invention discloses a battery pack parallel management method. Aiming at the problem of low power utilization rate of the existing parallel battery packs, the following technical solutions are provided, including obtaining the SOC value of each connected battery pack and querying the preset and SOC values The corresponding energy output level, and match the battery pack with the corresponding energy output level after query; calculate the maximum energy usage level supported by the output of the battery pack in parallel, and feed back the maximum energy usage level to the load; load-based energy usage Request, control the output of each battery pack within the matching energy output level, so that the output energy supported by parallel connection meets the energy usage request of the load. The invention discharges the battery pack with a higher SOC value in a higher power mode, and discharges the battery pack with a smaller SOC value in a low power mode, thereby delaying the energy discharge of the battery pack with less energy or delaying reaching the preset parking state, and then Delay the arrival of the "barrel effect" and make full use of the energy of parallel battery packs.

Description

technical field [0001] The invention relates to the field of battery energy storage, and more particularly, to a battery pack parallel management method, use method and management system, subcontracting subsystem, energy storage system, and electric vehicle. Background technique [0002] The multi-pack parallel connection of lithium batteries is widely used in energy storage systems, which can effectively increase the storage capacity of the battery system. Combined with the battery management system and thermal management system, the power stored in the battery system can be used more efficiently and safely. The vehicle can increase the cruising range of the electric vehicle, support quick battery replacement, avoid charging waiting, and bring great convenience to the use. [0003] The barrel effect refers to the fact that the final water level of the barrel is determined by the lowest board, and so is the battery. A battery module consists of a lot of cells. BMS generally...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/44
CPCH01M10/42H01M10/44H01M10/4207H01M2010/4271Y02E60/10
Inventor 潘键锋岳维陆士云王圩张颖
Owner 苏州联胜新能源科技有限公司