CN111722126B - Low-voltage discharge circuit, low-voltage discharge method and device - Google Patents
Low-voltage discharge circuit, low-voltage discharge method and device Download PDFInfo
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- CN111722126B CN111722126B CN201910222603.9A CN201910222603A CN111722126B CN 111722126 B CN111722126 B CN 111722126B CN 201910222603 A CN201910222603 A CN 201910222603A CN 111722126 B CN111722126 B CN 111722126B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000007599 discharging Methods 0.000 claims description 23
- 239000004065 semiconductor Substances 0.000 abstract description 5
- 239000003990 capacitor Substances 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to the technical field of batteries, and mainly provides a low-voltage discharge circuit, a low-voltage discharge method and a low-voltage discharge device, wherein the low-voltage discharge circuit is connected with a battery core, the battery core is driven to discharge through a discharge module, a discharge voltage signal of the battery core is obtained, the discharge voltage signal is received through a discharge voltage regulation module, and a corresponding auxiliary discharge voltage signal is output according to the discharge voltage signal, wherein a current positive end of a discharge channel and a voltage positive end of the discharge channel are both connected with a positive electrode of the battery core, a voltage negative end of the discharge channel is connected with a negative electrode of the battery core, a current negative end of the discharge voltage regulation module is connected with a current negative end of the discharge module, and the current positive end of the discharge voltage regulation module is connected with a negative electrode of the battery core, so that the problems that the existing battery detection equipment has impedance due to a circuit and a semiconductor, the battery detection equipment cannot realize low-voltage discharge and negative-voltage discharge experiments.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a low-voltage discharge circuit, a low-voltage discharge method and a low-voltage discharge device.
Background
In some special cases, destructive experiments, such as detection of limit performance data of the battery cell, failure recovery of the battery cell, simulation of explosion of the battery cell, etc., need to be performed on the battery cell, and such experiments may involve the problem of low-voltage discharge and even negative-voltage discharge.
However, the existing battery detection equipment cannot realize low-voltage discharge and negative-voltage discharge experiments because the self circuit and the semiconductor of the existing battery detection equipment have impedance or the capacitor used in the detection equipment is a polar capacitor.
Disclosure of Invention
The invention aims to provide a low-voltage discharge circuit, a low-voltage discharge method and a low-voltage discharge device, and aims to solve the problem that the battery detection equipment cannot realize low-voltage discharge and negative-voltage discharge experiments due to the fact that the existing circuit and semiconductor of the existing battery detection equipment have impedance or a capacitor used in the detection equipment is a polar capacitor.
The embodiment of the invention provides a low-voltage discharge circuit, which is connected with a battery cell, and comprises:
the discharging module is used for driving the battery cell to discharge and acquiring a discharging voltage signal output by the battery cell, a current positive end of the discharging module and a voltage positive end of the discharging module are both connected with a positive electrode of the battery cell, and a voltage negative end of the discharging module is connected with a negative electrode of the battery cell;
and the discharge voltage regulating module is used for receiving the discharge voltage signal and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal, a current negative electrode end of the discharge voltage regulating module is connected with a current negative electrode end of the discharge module, and a current positive electrode end of the discharge voltage regulating module is connected with a negative electrode of the battery cell.
Optionally, the discharge module is further configured to:
and controlling the battery cell to discharge at a first voltage threshold.
Optionally, the discharge module is a battery cell detection device.
Optionally, the discharge module is further configured to:
and obtaining a discharge current signal of the battery cell, and switching off the discharge output of the battery cell when the discharge current signal is greater than a preset current-limiting threshold value.
The present invention also provides a low-voltage discharge method applied to any one of the above low-voltage discharge circuits, the low-voltage discharge method including:
driving the battery cell to discharge by adopting a discharge module, and acquiring a discharge voltage signal output by the battery cell;
and receiving the discharge voltage signal through a discharge voltage regulation module, and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
Optionally, the receiving, by the discharge voltage adjusting module, the discharge voltage signal, and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal includes:
acquiring a discharge voltage value of the discharge voltage signal through a discharge voltage adjusting module;
acquiring a discharge voltage regulation threshold corresponding to the discharge voltage value from a preset discharge voltage regulation relation table according to the discharge voltage value;
and adjusting the voltage value of the auxiliary discharge voltage signal according to the discharge voltage adjusting threshold value.
Optionally, the obtaining, according to the discharge voltage value, a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table includes:
when the discharge voltage value is smaller than a first voltage threshold value and larger than or equal to a second voltage threshold value, the discharge voltage regulation threshold value is 0V;
when the discharge voltage value is smaller than the second voltage threshold and is larger than or equal to a third voltage threshold, the discharge voltage regulation threshold is a first preset discharge voltage regulation threshold;
and when the discharge voltage value is smaller than the third voltage threshold and is greater than or equal to 0V, the discharge voltage regulation threshold is a second preset discharge voltage regulation threshold.
Optionally, the obtaining, according to the discharge voltage value, a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table includes:
setting the sum of the discharge voltage adjustment threshold and the discharge voltage value as the first voltage threshold.
Optionally, the low-voltage discharging method further includes:
and setting the voltage value of the auxiliary discharge voltage signal to be the same as the first voltage threshold value so as to control the battery cell to perform negative-voltage discharge.
The present invention also provides a low-voltage discharge device, including:
an electric core; and
the low-voltage discharge circuit of any one of the preceding claims, wherein the low-voltage discharge circuit is connected to the battery cell.
The invention provides a low-voltage discharge circuit, a low-voltage discharge method and a low-voltage discharge device, wherein the low-voltage discharge circuit is connected with a battery cell, the battery cell is driven to discharge through a discharge module, a discharge voltage signal output by the battery cell is obtained, the discharge voltage signal is received through a discharge voltage regulation module, and a corresponding auxiliary discharge voltage signal is output according to the discharge voltage signal, wherein a current positive end of the discharge module and a voltage positive end of the discharge module are both connected with a positive electrode of the battery cell, a voltage negative end of the discharge module is connected with a negative electrode of the battery cell, a current negative end of the discharge voltage regulation module is connected with a current negative end of the discharge module, and a current positive end of the discharge voltage regulation module is connected with a negative electrode of the battery cell The problem that the battery detection equipment cannot realize low-voltage discharge and negative-voltage discharge experiments is caused by the fact that the semiconductor has impedance or the capacitor used in the detection equipment is a polar capacitor.
Drawings
Fig. 1 is a schematic structural diagram of a low-voltage discharge circuit according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a low-voltage discharging method applied to a low-voltage discharging circuit according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of a low-voltage discharging method applied to a low-voltage discharging circuit according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the present invention provides a low voltage discharge circuit, which is connected to a battery cell 10, and the low voltage discharge circuit includes:
the discharge module 20 is configured to drive the battery cell 10 to discharge and obtain a discharge voltage signal output by the battery cell 10, a current positive end I2+ of the discharge module 20 and a voltage positive end V2+ of the discharge module are both connected to a positive electrode V + of the battery cell, and a voltage negative end V2-of the discharge module 20 is connected to a negative electrode V-of the battery cell;
the discharge voltage adjusting module 30 is configured to receive the discharge voltage signal and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal, a current negative terminal V3-of the discharge voltage adjusting module 30 is connected to a current negative terminal V2-of the discharge module 20, and a current positive terminal I3+ of the discharge voltage adjusting module 30 is connected to a negative terminal V-of the battery cell 10.
In the present embodiment, the discharge module 20 drives the battery cell 10 to discharge, and is connected in parallel with the battery cell 10 through the voltage positive terminal V + and the voltage negative terminal V-to monitor the voltage value of the discharge voltage signal output by the battery cell 10 in real time, on the other hand, the current positive terminal I2+ of the discharge module 20 is connected with the positive terminal V + of the battery cell 10, and is subjected to reverse discharge through the discharge module 20, so as to discharge the battery cell 10, and adjust the discharge voltage of the discharge voltage adjustment module 30 according to the discharge voltage of the battery cell, so that the battery cell 10 can continue to discharge at a low voltage.
In one embodiment, the existing cell detection device is a multi-channel device, each detection channel can perform a conventional detection function of a cell, and both the discharge module 20 and the discharge voltage adjustment module 30 can adopt the detection channel in the cell detection device.
In one embodiment, the discharge module 20 is a cell detection device.
In one embodiment, the discharge voltage regulation module 30 may be a constant voltage regulated source.
In an embodiment, the discharge module 20 is further configured to obtain a discharge current signal of the battery cell, and shut off the discharge output of the battery cell when the discharge current signal is greater than a preset current-limiting threshold.
In one embodiment, the discharge module 20 is further configured to:
and controlling the battery cell 10 to discharge at a first voltage threshold.
In this embodiment, the discharge module 20 may control the discharge voltage of the battery cell 10, so that the battery cell 10 discharges according to a preset first voltage threshold, specifically, the first voltage threshold is set according to the type of the battery cell 10.
In one embodiment, the first voltage threshold may be set to 3V.
In one embodiment, the discharge voltage regulation module 30 is further configured to:
acquiring a discharge voltage value of the discharge voltage signal;
acquiring a discharge voltage regulation threshold corresponding to the discharge voltage value from a preset discharge voltage regulation relation table according to the discharge voltage value;
and adjusting the voltage value of the auxiliary discharge voltage signal according to the discharge voltage adjusting threshold value.
In the present embodiment, a discharge voltage regulation relation table in which discharge voltage values are in one-to-one correspondence with discharge voltage regulation threshold values is provided in the discharge voltage regulation module 30. The discharge voltage adjusting module 30 may determine a discharge voltage threshold range in which the discharge voltage value is located according to the discharge voltage value, where each discharge voltage threshold range corresponds to one discharge voltage adjusting threshold.
In one embodiment, the discharge voltage regulation relationship table preset in the discharge voltage regulation module in this embodiment includes:
when the discharge voltage value is smaller than the first voltage threshold and larger than or equal to a second voltage threshold, the discharge voltage regulation threshold is 0V;
when the discharge voltage value is smaller than the second voltage threshold and is larger than or equal to a third voltage threshold, the discharge voltage regulation threshold is a first preset discharge voltage regulation threshold;
and when the discharge voltage value is smaller than the third voltage threshold and is greater than or equal to 0V, the discharge voltage regulation threshold is a second preset discharge voltage regulation threshold.
In one embodiment, the second voltage threshold may be 2V, the third voltage threshold may be 1V, and the first preset discharge voltage adjustment threshold may be 1V.
In one embodiment, the second preset discharge voltage adjustment threshold may be 2V.
In one embodiment, the discharge voltage regulation relationship table preset in the discharge voltage regulation module in this embodiment includes:
setting the sum of the discharge voltage adjustment threshold and the discharge voltage value as the first voltage threshold. Specifically, the first voltage threshold is the discharge voltage adjustment threshold + the discharge voltage value, so that the cell discharge balance is achieved.
In one embodiment, the discharge voltage regulation module 30 is further configured to:
and setting the voltage value of the auxiliary discharge voltage signal to be the same as the first voltage threshold value so as to control the battery cell to perform negative-voltage discharge.
Fig. 2 is a schematic flow chart of a low-voltage discharging method applied to the low-voltage discharging circuit according to any one of the above embodiments, as shown in fig. 2, the low-voltage discharging method in this embodiment includes:
step S10: driving the battery cell to discharge by adopting a discharge module, and acquiring a discharge voltage signal output by the battery cell;
step S20: and receiving the discharge voltage signal through a discharge voltage regulation module, and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
In one embodiment, referring to fig. 3, step S20: the receiving of the discharge voltage signal by the discharge voltage regulation module and the outputting of a corresponding auxiliary discharge voltage signal according to the discharge voltage signal include:
step S21: acquiring a discharge voltage value of the discharge voltage signal through a discharge voltage adjusting module;
step S22: acquiring a discharge voltage regulation threshold corresponding to the discharge voltage value from a preset discharge voltage regulation relation table according to the discharge voltage value;
step S23: and adjusting the voltage value of the auxiliary discharge voltage signal according to the discharge voltage adjusting threshold value.
In this embodiment, a discharge voltage regulation relation table is provided in the discharge voltage regulation module, and in the discharge voltage regulation relation table, the discharge voltage values correspond to the discharge voltage regulation thresholds one to one. The discharge voltage adjusting module may determine a discharge voltage threshold range in which the discharge voltage value is located according to the discharge voltage value, where each discharge voltage threshold range corresponds to one discharge voltage adjusting threshold.
In one embodiment, obtaining a discharge voltage regulation threshold corresponding to the discharge voltage value from a preset discharge voltage regulation relation table according to the discharge voltage value includes:
when the discharge voltage value is smaller than a first voltage threshold value and larger than or equal to a second voltage threshold value, the discharge voltage regulation threshold value is 0V;
when the discharge voltage value is smaller than the second voltage threshold and is larger than or equal to a third voltage threshold, the discharge voltage regulation threshold is a first preset discharge voltage regulation threshold;
and when the discharge voltage value is smaller than the third voltage threshold and is greater than or equal to 0V, the discharge voltage regulation threshold is a second preset discharge voltage regulation threshold.
In one embodiment, the first voltage threshold may be set to 3V.
In one embodiment, the second voltage threshold may be 2V, the third voltage threshold may be 1V, and the first preset discharge voltage adjustment threshold may be 1V.
In one embodiment, the second preset discharge voltage adjustment threshold may be 2V.
In one embodiment, the obtaining of the discharge voltage regulation threshold corresponding to the discharge voltage value from a preset discharge voltage regulation relation table according to the discharge voltage value includes:
setting the sum of the discharge voltage adjustment threshold and the discharge voltage value as the first voltage threshold. Specifically, in the discharge process of the battery cell, the voltage value of the discharge voltage signal is a first voltage threshold, and the first voltage threshold is the discharge voltage adjustment threshold + the discharge voltage value, so that the discharge balance of the battery cell is achieved.
In one embodiment, the low voltage discharge method further comprises:
and setting the voltage value of the auxiliary discharge voltage signal to be the same as the first voltage threshold value so as to control the battery cell to perform negative-voltage discharge.
An embodiment of the present invention further provides a low voltage discharge device, where the low voltage discharge device includes:
an electric core; and
the low-voltage discharge circuit of any one of the preceding claims, wherein the low-voltage discharge circuit is connected to the battery cell.
The invention provides a low-voltage discharge circuit, a low-voltage discharge method and a low-voltage discharge device, wherein the low-voltage discharge circuit is connected with a battery cell, the battery cell is driven to discharge through a discharge module, a discharge voltage signal output by the battery cell is obtained, the discharge voltage signal is received through a discharge voltage regulation module, and a corresponding auxiliary discharge voltage signal is output according to the discharge voltage signal, wherein a current positive end of the discharge module and a voltage positive end of the discharge module are both connected with a positive electrode of the battery cell, a voltage negative end of the discharge module is connected with a negative electrode of the battery cell, a current negative end of the discharge voltage regulation module is connected with a current negative end of the discharge module, and a current positive end of the discharge voltage regulation module is connected with a negative electrode of the battery cell The problem that the battery detection equipment cannot realize low-voltage discharge and negative-voltage discharge experiments is caused by the fact that the semiconductor has impedance or the capacitor used in the detection equipment is a polar capacitor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A low-voltage discharge method applied to a low-voltage discharge circuit, the low-voltage discharge circuit comprising:
the discharging module is used for driving the battery cell to discharge and acquiring a discharging voltage signal output by the battery cell, a current positive end of the discharging module and a voltage positive end of the discharging module are both connected with a positive electrode of the battery cell, and a voltage negative end of the discharging module is connected with a negative electrode of the battery cell;
the discharge voltage adjusting module is used for receiving the discharge voltage signal and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal, a current negative electrode end of the discharge voltage adjusting module is connected with a current negative electrode end of the discharge module, and a current positive electrode end of the discharge voltage adjusting module is connected with a negative electrode of the battery cell;
the low-voltage discharge method includes:
driving the battery cell to discharge by adopting a discharge module, and acquiring a discharge voltage signal output by the battery cell;
receiving the discharge voltage signal through a discharge voltage adjusting module, and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal;
the receiving of the discharge voltage signal by the discharge voltage regulation module and the outputting of a corresponding auxiliary discharge voltage signal according to the discharge voltage signal include:
acquiring a discharge voltage value of the discharge voltage signal through a discharge voltage adjusting module;
acquiring a discharge voltage regulation threshold corresponding to the discharge voltage value from a preset discharge voltage regulation relation table according to the discharge voltage value;
adjusting the voltage value of the auxiliary discharge voltage signal according to the discharge voltage adjustment threshold;
the obtaining of the discharge voltage regulation threshold corresponding to the discharge voltage value from a preset discharge voltage regulation relation table according to the discharge voltage value includes:
when the discharge voltage value is smaller than a first voltage threshold value and larger than or equal to a second voltage threshold value, the discharge voltage regulation threshold value is 0V;
when the discharge voltage value is smaller than the second voltage threshold and is larger than or equal to a third voltage threshold, the discharge voltage regulation threshold is a first preset discharge voltage regulation threshold;
and when the discharge voltage value is smaller than the third voltage threshold and is greater than or equal to 0V, the discharge voltage regulation threshold is a second preset discharge voltage regulation threshold.
2. The low-voltage discharging method according to claim 1, wherein the obtaining of the discharging voltage regulation threshold corresponding to the discharging voltage value from a preset discharging voltage regulation relation table according to the discharging voltage value comprises:
setting the sum of the discharge voltage adjustment threshold and the discharge voltage value as the first voltage threshold.
3. The low voltage discharge method of claim 1, further comprising:
and setting the voltage value of the auxiliary discharge voltage signal to be the same as the first voltage threshold value so as to control the battery cell to perform negative-voltage discharge.
4. The low voltage discharge method of claim 1, wherein the discharge module is further configured to:
and controlling the battery cell to discharge at a first voltage threshold.
5. The low-voltage discharge method of claim 1, wherein the discharge module is a cell detection device.
6. The low voltage discharge method of claim 1, wherein the discharge module is further configured to:
and obtaining a discharge current signal of the battery cell, and switching off the discharge output of the battery cell when the discharge current signal is greater than a preset current-limiting threshold value.
7. A low-voltage discharge device for performing the low-voltage discharge method according to any one of claims 1 to 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910222603.9A CN111722126B (en) | 2019-03-22 | 2019-03-22 | Low-voltage discharge circuit, low-voltage discharge method and device |
| PCT/CN2019/092812 WO2020191932A1 (en) | 2019-03-22 | 2019-06-25 | Low-voltage discharge circuit and low-voltage discharge method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910222603.9A CN111722126B (en) | 2019-03-22 | 2019-03-22 | Low-voltage discharge circuit, low-voltage discharge method and device |
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| CN111722126A CN111722126A (en) | 2020-09-29 |
| CN111722126B true CN111722126B (en) | 2021-07-02 |
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| WO (1) | WO2020191932A1 (en) |
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| CN112557923A (en) * | 2020-12-01 | 2021-03-26 | 上海电器科学研究所（集团）有限公司 | Battery overdischarge test method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554374A (en) * | 2010-12-17 | 2012-07-11 | 财团法人工业技术研究院 | Self-adjusting discharge machining energy-saving power supply device and method thereof |
| CN205595844U (en) * | 2016-04-18 | 2016-09-21 | 深圳Tcl数字技术有限公司 | Capacitor discharge circuit, communication interface power supply loop and electronic equipment |
| CN106787081A (en) * | 2016-11-22 | 2017-05-31 | 中车株洲电力机车有限公司 | A kind of electric discharge device and method for electric locomotive |
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| US10629563B2 (en) * | 2015-05-03 | 2020-04-21 | Kaijo Corporation | Ball forming device for wire bonder |
| CN107171030B (en) * | 2016-03-08 | 2022-02-11 | 松下知识产权经营株式会社 | Power storage system and control method for power storage system |
| CN205544236U (en) * | 2016-04-07 | 2016-08-31 | 无锡中感微电子股份有限公司 | Improved generation battery protection circuit and system |
| CN108414936B (en) * | 2017-02-10 | 2019-10-29 | 宁德时代新能源科技股份有限公司 | Method and device for calibrating state of charge of energy storage system |
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- 2019-03-22 CN CN201910222603.9A patent/CN111722126B/en active Active
- 2019-06-25 WO PCT/CN2019/092812 patent/WO2020191932A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554374A (en) * | 2010-12-17 | 2012-07-11 | 财团法人工业技术研究院 | Self-adjusting discharge machining energy-saving power supply device and method thereof |
| CN205595844U (en) * | 2016-04-18 | 2016-09-21 | 深圳Tcl数字技术有限公司 | Capacitor discharge circuit, communication interface power supply loop and electronic equipment |
| CN106787081A (en) * | 2016-11-22 | 2017-05-31 | 中车株洲电力机车有限公司 | A kind of electric discharge device and method for electric locomotive |
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| CN111722126A (en) | 2020-09-29 |
| WO2020191932A1 (en) | 2020-10-01 |
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