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Battery management device

A technology of battery management and equipment, applied in the direction of secondary batteries, battery circuit devices, secondary battery repair/maintenance, etc., can solve problems such as power changes, errors, and difficulty in frequently measuring capacitor degradation, so as to prevent signal loss , The effect of reducing manufacturing time and cost

Pending Publication Date: 2022-04-08
LG ENERGY SOLUTION LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this, the motor must be stopped, and the system must also be stopped to cut off the power to the inverter, so it is difficult to measure the deterioration of the capacitor frequently
Also, if the motor is replaced with another motor after the initial value of the capacitance is measured, the power consumed by the load changes, so errors may occur

Method used

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Embodiment Construction

[0043] It should be understood that the terms used in the specification and appended claims should not be construed as being limited to common dictionary meanings, but are based on the principle of allowing the inventor to define the term for best description based on the technology of the present disclosure. The corresponding meanings and concepts of aspects are explained.

[0044] Therefore, the descriptions presented herein are preferred examples for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that other equivalents and modifications can be made without departing from the scope of the present disclosure. form.

[0045] Also, in describing the present disclosure, when it is considered that a detailed description of a related known element or function makes the key subject matter of the present disclosure obscure, the detailed description is omitted herein.

[0046] Terms including ordinal numbers s...

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Abstract

A battery management apparatus according to an embodiment of the present invention includes: an inverter connected to a battery cell and configured to convert a DC current output from the battery cell into an AC current and output the AC current according to an operation state of a plurality of switches provided therein; a measurement unit connected to a diagnostic line to which the AC current converted by the inverter is output, the measurement unit measuring a voltage of the diagnostic line and configured to output a measurement result; and a control unit having a plurality of capacitors connected to the diagnosis line, and configured to control an operation state of the plurality of switches, receive the measurement result output from the measurement unit, and diagnose a state of the plurality of capacitors based on the received measurement result.

Description

technical field [0001] This application claims priority from Korean Patent Application No. 10-2019-0123403 filed in Korea on October 4, 2019, the disclosure of which is incorporated herein by reference. [0002] The present invention relates to a battery management device, and more particularly, to a battery management device for diagnosing the state of a capacitor provided in a control unit. Background technique [0003] Recently, the demand for portable electronic products such as notebook computers, video cameras, and portable phones has increased dramatically, and electric vehicles, energy storage batteries, robots, satellites, etc. have been seriously developed. Therefore, high-performance batteries that allow repeated charging and discharging are actively being researched. [0004] Currently commercially available batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium batteries, and the like. Among them, lithium bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/48G01R1/20G01R31/3835G01R31/392
CPCG01R31/64G01R31/42H01M2010/4271H01M10/425H01M10/4257H01M10/4264H01M10/482G01R31/392G01R31/3835G01R1/203H02J2207/20H02J7/0013
Inventor 宋炫振
Owner LG ENERGY SOLUTION LTD
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