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Method and system for battery cell

A battery unit and control system technology, applied in batteries, electrical components, secondary batteries, etc., can solve problems such as reducing battery life, reducing energy storage capacity, and accelerating battery aging.

Pending Publication Date: 2022-07-19
GM GLOBAL TECH OPERATIONS LLC
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Problems solved by technology

Operation of Li-ion batteries outside of this temperature range can accelerate battery aging, reduce battery life, and / or reduce its energy storage capacity

Method used

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  • Method and system for battery cell
  • Method and system for battery cell

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Embodiment Construction

[0069] Lithium-ion batteries generally work by reversibly transferring lithium ions between a negative electrode (sometimes called an anode) and a positive electrode (sometimes called a cathode). The negative and positive electrodes are located on opposite sides of a porous polymer separator impregnated with an electrolyte solution suitable for conducting lithium ions. Each of the negative and positive electrodes is also housed by a respective current collector. The current collectors associated with the two electrodes are connected by an interruptible external circuit that allows current to pass between the electrodes to electrically balance the associated migration of lithium ions. In addition, the negative electrode may include a lithium intercalation host material, and the positive electrode may include a lithium-based active material capable of storing lithium ions at a higher potential than the intercalation host material of the negative electrode.

[0070] Electric and...

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Abstract

A method, apparatus and control system for a battery cell includes a heat exchanger in thermal contact with the battery cell and a first controller. A first controller is connected to the heat exchanger and monitors the battery cells. The first controller includes a reduced order electrochemical model, a heating model, and a heating controller. The first controller determines a target parameter of the battery cell and determines a battery cell parameter. The reduced order electrochemical model determines internal ROM variables based on cell parameters. The heat generation model determines electrochemical heat generation parameters from the battery cell based on the internal ROM variables and target parameters of the battery cell. The heat generation controller determines a thermal work parameter based on the electrochemical heat generation of the battery cell and a target parameter. The heat exchanger is controlled based on the thermal work parameter.

Description

Background technique [0001] A DC power source, such as a battery, is an electrochemical device that can be used to store and release electrical power that can be used by a circuit or motor to perform work, such as for communication, display, or propulsion. Heat can be generated by the process of converting electrical energy into chemical potential energy (ie, charging the battery) and converting chemical potential energy into electrical energy (ie, discharging the battery). [0002] A lithium ion battery is an electrochemical device that works by reversibly transferring lithium ions between a negative electrode (or anode) and a positive electrode (or cathode). The negative and positive electrodes are located on opposite sides of a porous polymer separator impregnated with an electrolyte solution suitable for conducting lithium ions. Each of the negative and positive electrodes is also housed by a respective current collector. The current collectors associated with the two el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/65
CPCH01M10/65H01M10/425H01M10/0525H01M2220/20H01M10/633H01M10/6572H01M10/647H01M10/61H01M10/63H01M10/615H01M2250/20H01M10/482H01M10/625
Inventor T·R·加里克Y·戴
Owner GM GLOBAL TECH OPERATIONS LLC
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