Check patentability & draft patents in minutes with Patsnap Eureka AI!

Series-parallel battery SOC determination method and device, electronic equipment and storage medium

A method for determining the state of charge of a battery, a technique used in measuring devices, measuring electricity, measuring electrical variables, etc.

Pending Publication Date: 2022-02-18
SVOLT ENERGY TECHNOLOGY CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because two different batteries have different battery parameters and performance, the SOC estimation of the battery system has become one of the difficulties of the hybrid battery.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Series-parallel battery SOC determination method and device, electronic equipment and storage medium
  • Series-parallel battery SOC determination method and device, electronic equipment and storage medium
  • Series-parallel battery SOC determination method and device, electronic equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 of the present invention provides a method for determining the SOC of a hybrid battery. figure 1 It is a schematic flow chart of the method for determining the SOC of the hybrid battery in Example 1 of the present invention, as figure 1 As shown, the method for determining the SOC of the hybrid battery in Example 1 of the present invention includes the following steps:

[0025] S101: Estimate the state of charge of the battery in the current state of the ternary lithium-ion battery to obtain a first current state of charge SOC_S of the ternary lithium-ion battery.

[0026] As an example, the parameters of the hybrid battery system mainly composed of ternary lithium-ion battery (NCM) and lithium iron phosphate battery (LFP) are obtained. The ternary lithium-ion battery and the lithium iron phosphate battery form a hybrid battery system. The number of ternary lithium-ion batteries is defined as m, and the number of lithium iron phosphate batteries is n. Con...

Embodiment 2

[0078] Corresponding to Embodiment 1 of the present invention, Embodiment 2 of the present invention provides a device for determining the SOC of a hybrid battery. Figure 4 It is a schematic structural diagram of the device for determining the SOC of a hybrid battery in Example 2 of the present invention, as shown in image 3 As shown, the device for determining the SOC of a hybrid battery according to Embodiment 2 of the present invention includes a first estimation module 20 , an acquisition module 21 , a first processing module 22 , a second estimation module 23 and a second processing module 24 .

[0079] Specifically, the first estimation module 20 is configured to estimate the state of charge of the battery in the current state of the ternary lithium-ion battery to obtain the first current state of charge SOC_S of the ternary lithium-ion battery.

[0080] The obtaining module 21 is configured to obtain the average temperature of all cells in the parallel battery in the ...

Embodiment 3

[0086] An embodiment of the present invention also provides an electronic device, which may include a processor and a memory, where the processor and the memory may be connected through a bus or in other ways.

[0087] The processor may be a central processing unit (Central Processing Unit, CPU). The processor can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application-specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate array (Field-Programmable Gate Array, FPGA) or other Chips such as programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above-mentioned types of chips.

[0088] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs, non-transitory computer-executable programs and modules, such as program instructions / module (for example,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a series-parallel battery SOC determination method and device, electronic equipment and a storage medium. The series-parallel battery SOC determination method comprises the following steps of estimating a battery state of charge of a ternary lithium ion cell in a current state to obtain a first current state of charge SOC_S of the ternary lithium ion cell, acquiring the average temperature of all battery cells in the series-parallel battery in the current state, and determining the capacity ratio Ka of the ternary lithium ion battery cell to the lithium iron phosphate battery cell at the average temperature, determining a second current state of charge (SOC_L) of the lithium iron phosphate cell in the current state based on the SOC_S and the Ka, and determining the SOC of the series-parallel battery in the current state according to the SOC_S and the SOC_L, so that the SOC of the series-parallel battery can be estimated.

Description

technical field [0001] The present invention relates to the technical field of battery management, in particular to a method, device, electronic equipment and storage medium for determining the SOC of a hybrid battery. Background technique [0002] In recent years, with the increasingly prominent energy crisis and environmental problems, electric vehicles have become an important development direction of the automobile industry. As an important part of new energy electric vehicles, the control technology of BMS (Battery Management System) directly affects the safety and reliability of the vehicle. The battery state of charge (SOC for short) is an important parameter of the remaining power of the power battery of an electric vehicle, and it is also one of the difficulties in BMS estimation. Especially for battery packs with lithium iron phosphate cells as units, due to the stability of its voltage, SOC is difficult to estimate accurately. The accuracy of SOC during the actu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01R31/388G01R31/396G01R31/367
CPCG01R31/388G01R31/396G01R31/367Y02T10/70
Inventor 赵龙灿李东江宋泽宇张旭于洪泽
Owner SVOLT ENERGY TECHNOLOGY CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com