WO2020191932A1 - Low-voltage discharge circuit and low-voltage discharge method and apparatus - Google Patents

Low-voltage discharge circuit and low-voltage discharge method and apparatus Download PDF

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Publication number
WO2020191932A1
WO2020191932A1 PCT/CN2019/092812 CN2019092812W WO2020191932A1 WO 2020191932 A1 WO2020191932 A1 WO 2020191932A1 CN 2019092812 W CN2019092812 W CN 2019092812W WO 2020191932 A1 WO2020191932 A1 WO 2020191932A1
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Prior art keywords
discharge
voltage
low
discharge voltage
module
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PCT/CN2019/092812
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French (fr)
Chinese (zh)
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毛广甫
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深圳市瑞能实业股份有限公司
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Publication of WO2020191932A1 publication Critical patent/WO2020191932A1/en

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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
    • 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
    • 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

Definitions

  • This solution belongs to the technical field of batteries, and particularly relates to a low-voltage discharge circuit, a low-voltage discharge method and device.
  • the existing battery testing equipment has impedances in its own circuits and semiconductors, or the capacitors used in the testing equipment are polar capacitors, so that the battery testing equipment cannot implement low-voltage discharge and negative-voltage discharge experiments.
  • the purpose of this solution is to provide a low-voltage discharge circuit, a low-voltage discharge method and device, which are designed to solve the problem that the existing battery testing equipment has impedance due to its own circuit and semiconductor, or the capacitor used in the testing equipment is a polar capacitor.
  • the battery testing equipment cannot realize the problem of low-voltage discharge and negative-voltage discharge experiments.
  • the embodiment of the solution provides a low-voltage discharge circuit, which is connected to the battery core, and the low-voltage discharge circuit includes:
  • the discharge module is used to drive the battery to discharge and obtain the discharge voltage signal output by the battery.
  • the positive current terminal of the discharge module and the positive voltage terminal of the discharge module are both connected to the positive terminal of the battery ,
  • the voltage negative terminal of the discharge module is connected to the negative terminal of the battery;
  • the discharge voltage adjustment module is configured to receive the discharge voltage signal and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
  • the current negative terminal of the discharge voltage adjustment module is connected to the current negative terminal of the discharge module,
  • the positive current terminal of the discharge voltage regulating module is connected with the negative electrode of the battery core.
  • the discharge module is also used for:
  • the battery is controlled to discharge at a first voltage threshold.
  • the discharge module is a battery detection device.
  • the discharge module is also used for:
  • This solution also provides a low-voltage discharge method applied to any one of the above-mentioned low-voltage discharge circuits, and the low-voltage discharge method includes:
  • a discharging module to drive the battery to discharge, and obtain a discharge voltage signal output by the battery
  • the discharge voltage adjustment module receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
  • the receiving the discharge voltage signal through the discharge voltage adjustment module and outputting the corresponding auxiliary discharge voltage signal according to the discharge voltage signal includes:
  • the voltage value of the auxiliary discharge voltage signal is adjusted according to the discharge voltage adjustment threshold.
  • the obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
  • the discharge voltage adjustment threshold value is 0V
  • the discharge voltage adjustment threshold value is a first preset discharge voltage adjustment threshold value
  • the discharge voltage adjustment threshold is a second preset discharge voltage adjustment threshold.
  • the obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
  • the sum of the discharge voltage adjustment threshold value and the discharge voltage value is set as the first voltage threshold value.
  • the low-voltage discharge method further includes:
  • the voltage value of the auxiliary discharge voltage signal is set to be the same as the first voltage threshold to control the battery cell to perform negative voltage discharge.
  • This solution also provides a low-voltage discharge device, which includes:
  • the low-voltage discharge circuit is connected to the battery core.
  • This solution provides a low-voltage discharge circuit, a low-voltage discharge method and device.
  • the low-voltage discharge circuit is connected to the cell, drives the cell to discharge through the discharge module, and obtains the discharge voltage signal output by the cell, and passes the discharge voltage
  • the adjustment module receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
  • the positive current terminal of the discharge module and the positive voltage terminal of the discharge module are both the same as those of the battery cell.
  • the voltage negative terminal of the discharge module is connected to the negative terminal of the battery
  • the current negative terminal of the discharge voltage regulation module is connected to the current negative terminal of the discharge module
  • the current of the discharge voltage regulation module is positive
  • the extreme is connected to the negative pole of the battery, which solves the problem that the existing battery testing equipment has impedance due to its own circuit and semiconductor, or the capacitor used in the testing equipment is a polar capacitor, which causes the battery testing equipment to fail to achieve low-voltage discharge and negative The problem of voltage discharge experiment.
  • Figure 1 is a schematic structural diagram of a low-voltage discharge circuit provided by an embodiment of the solution.
  • FIG. 2 is a schematic flowchart of a low-voltage discharge method applied to a low-voltage discharge circuit according to an embodiment of the solution.
  • FIG. 3 is a schematic flowchart of a low-voltage discharge method applied to a low-voltage discharge circuit according to another embodiment of the solution.
  • the embodiment of the solution provides a low-voltage discharge circuit, which is connected to the cell 10, and the low-voltage discharge circuit includes:
  • the discharge module 20 is used to drive the battery core 10 to discharge and obtain the discharge voltage signal output by the battery core 10.
  • the positive current terminal I2+ of the discharge module 20 and the positive voltage terminal V2+ of the discharge module are both equal to The positive pole V+ of the battery is connected, and the voltage negative terminal V2- of the discharge module 20 is connected with the negative V- of the battery;
  • the discharge voltage adjustment module 30 is configured to receive the discharge voltage signal and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
  • the current negative terminal V3- of the discharge voltage adjustment module 30 and the discharge module 20 The current negative terminal V2- is connected, and the current positive terminal I3+ of the discharge voltage regulating module 30 is connected to the negative electrode V- of the battery core 10.
  • the discharge module 20 drives the cell 10 to discharge, and monitors the voltage value of the discharge voltage signal output by the cell 10 in real time through the voltage positive terminal V+ and the voltage negative terminal V- in parallel with the cell 10, and another
  • the positive current terminal I2+ of the discharge module 20 is connected to the positive electrode V+ of the cell 10, and the discharge module 20 performs reverse discharge to discharge the cell 10, and adjusts the discharge of the discharge voltage adjustment module 30 according to the discharge voltage of the cell.
  • the voltage enables the battery cell 10 to continue to discharge under low voltage.
  • the existing battery detection equipment is a multi-channel device, and each detection channel can complete the conventional detection function of the battery.
  • Both the discharge module 20 and the discharge voltage adjustment module 30 can use the battery detection equipment. Detection channel.
  • the discharging module 20 is a battery detection device.
  • the discharge voltage regulating module 30 may be a constant voltage regulating source.
  • the discharging module 20 is further configured to obtain a discharge current signal of the battery cell, and when the discharge current signal is greater than a preset current limit threshold, turn off the discharge output of the battery cell.
  • the discharge module 20 is also used for:
  • the battery cell 10 is controlled to discharge at a first voltage threshold.
  • the discharge module 20 can control the discharge voltage of the battery cell 10, so that the battery cell 10 is discharged according to a preset first voltage threshold.
  • the first voltage threshold is performed according to the type of the battery cell 10. Set up.
  • the first voltage threshold may be set to 3V.
  • the discharge voltage adjustment module 30 is further used for:
  • the voltage value of the auxiliary discharge voltage signal is adjusted according to the discharge voltage adjustment threshold.
  • the discharge voltage adjustment module 30 is provided with a discharge voltage adjustment relationship table.
  • the discharge voltage value corresponds to the discharge voltage adjustment threshold value one-to-one.
  • the discharge voltage adjustment module 30 may first determine the 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 a discharge voltage adjustment threshold.
  • the discharge voltage adjustment relationship table preset in the discharge voltage adjustment module in this embodiment includes:
  • the discharge voltage adjustment threshold value is 0V
  • the discharge voltage adjustment threshold value is a first preset discharge voltage adjustment threshold value
  • the discharge voltage adjustment threshold is a second preset discharge voltage adjustment threshold.
  • the second voltage threshold may be 2V
  • the third voltage threshold may be 1V
  • the first preset discharge voltage adjustment threshold may be 1V
  • the second preset discharge voltage adjustment threshold may be 2V.
  • the discharge voltage adjustment relationship table preset in the discharge voltage adjustment module in this embodiment includes:
  • the sum of the discharge voltage adjustment threshold value and the discharge voltage value is set as the first voltage threshold value.
  • the first voltage threshold diischarge voltage adjustment threshold+discharge voltage value, so as to achieve the cell discharge balance.
  • the discharge voltage adjustment module 30 is further used for:
  • the voltage value of the auxiliary discharge voltage signal is set to be the same as the first voltage threshold to control the battery cell to perform negative voltage discharge.
  • FIG. 2 is a schematic flowchart of a low-voltage discharge method applied to the low-voltage discharge circuit described in any one of the above embodiments according to an embodiment of the solution. As shown in FIG. 2, the low-voltage discharge method in this embodiment includes:
  • Step S10 Use a discharging module to drive the battery to discharge, and obtain a discharge voltage signal output by the battery;
  • Step S20 Receive the discharge voltage signal through the discharge voltage adjustment module, and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
  • step S20: receiving the discharge voltage signal through the discharge voltage adjustment module, and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal includes:
  • Step S21 Obtain the discharge voltage value of the discharge voltage signal through the discharge voltage adjustment module
  • Step S22 Acquire a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value;
  • Step S23 Adjust the voltage value of the auxiliary discharge voltage signal according to the discharge voltage adjustment threshold.
  • the discharge voltage adjustment module is provided with a discharge voltage adjustment relationship table.
  • the discharge voltage value corresponds to the discharge voltage adjustment threshold value one-to-one.
  • the discharge voltage adjustment module may first determine the 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 a discharge voltage adjustment threshold.
  • obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
  • the discharge voltage adjustment threshold value is 0V
  • the discharge voltage adjustment threshold value is a first preset discharge voltage adjustment threshold value
  • the discharge voltage adjustment threshold is a second preset discharge voltage adjustment threshold.
  • the first voltage threshold may be set to 3V.
  • the second voltage threshold may be 2V
  • the third voltage threshold may be 1V
  • the first preset discharge voltage adjustment threshold may be 1V
  • the second preset discharge voltage adjustment threshold may be 2V.
  • the obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
  • the sum of the discharge voltage adjustment threshold value and the discharge voltage value is set as the first voltage threshold value.
  • the low-voltage discharge method further includes:
  • the voltage value of the auxiliary discharge voltage signal is set to be the same as the first voltage threshold to control the battery cell to perform negative voltage discharge.
  • the embodiment of the solution also provides a low-voltage discharge device, which includes:
  • the low-voltage discharge circuit is connected to the battery core.
  • This solution provides a low-voltage discharge circuit, a low-voltage discharge method and device.
  • the low-voltage discharge circuit is connected to the cell, drives the cell to discharge through the discharge module, and obtains the discharge voltage signal output by the cell, and passes the discharge voltage
  • the adjustment module receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
  • the positive current terminal of the discharge module and the positive voltage terminal of the discharge module are both the same as those of the battery cell.
  • the voltage negative terminal of the discharge module is connected to the negative terminal of the battery
  • the current negative terminal of the discharge voltage regulation module is connected to the current negative terminal of the discharge module
  • the current of the discharge voltage regulation module is positive
  • the extreme is connected to the negative pole of the battery, which solves the problem that the existing battery testing equipment has impedance due to its own circuit and semiconductor, or the capacitor used in the testing equipment is a polar capacitor, which causes the battery testing equipment to fail to achieve low-voltage discharge and negative The problem of voltage discharge experiment.

Abstract

Disclosed are a low-voltage discharge circuit and a low-voltage discharge method and apparatus, falling within the technical field of batteries. The low-voltage discharge circuit is connected to a cell (10), wherein a discharge module (20) drives the cell (10) to discharge electricity, and acquires a discharge voltage signal of the cell (10); and a discharge voltage regulation module (30) receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal. A current positive electrode end of a discharge channel and a voltage positive electrode end of the discharge channel are both connected to a positive electrode of the cell (10), and a voltage negative electrode end of the discharge channel is connected to a negative electrode of the cell (10); and a current negative electrode end of the discharge voltage regulation module (30) is connected to a current negative electrode end of the discharge module (20), and a current positive electrode end of the discharge voltage regulation module (30) is connected to a negative electrode of the cell (10), thereby solving the problem of an existing battery detection device not being capable of implementing a low-voltage discharge or a negative-voltage discharge test due to a line and a semiconductor of the battery detection device both having impedance or a capacitor used in the detection device being a polarized capacitor.

Description

一种低压放电电路、低压放电方法及装置Low-voltage discharge circuit, low-voltage discharge method and device 技术领域Technical field
本方案属于电池技术领域，尤其涉及一种低压放电电路、低压放电方法及装置。This solution belongs to the technical field of batteries, and particularly relates to a low-voltage discharge circuit, a low-voltage discharge method and device.
背景技术Background technique
在一些特殊情况下，需要对电芯进行破坏性实验，如电芯极限性能数据检测、电芯故障还原、电芯爆炸模拟等，这种实验会涉及到低压放电甚至负压放电问题。In some special cases, it is necessary to conduct destructive experiments on the cells, such as cell limit performance data detection, cell failure restoration, cell explosion simulation, etc. Such experiments may involve low-voltage discharge or even negative-voltage discharge.
然而，现有的电池检测设备由于自身线路、半导体都存在阻抗，或者检测设备中使用的电容为有极性电容，导致电池检测设备无法实现低压放电及负压放电实验。However, the existing battery testing equipment has impedances in its own circuits and semiconductors, or the capacitors used in the testing equipment are polar capacitors, so that the battery testing equipment cannot implement low-voltage discharge and negative-voltage discharge experiments.
技术问题technical problem
本方案的目的在于提供一种低压放电电路、低压放电方法及装置，旨在解决现有的电池检测设备由于自身线路、半导体都存在阻抗，或者检测设备中使用的电容为有极性电容，导致电池检测设备无法实现低压放电及负压放电实验的问题。The purpose of this solution is to provide a low-voltage discharge circuit, a low-voltage discharge method and device, which are designed to solve the problem that the existing battery testing equipment has impedance due to its own circuit and semiconductor, or the capacitor used in the testing equipment is a polar capacitor. The battery testing equipment cannot realize the problem of low-voltage discharge and negative-voltage discharge experiments.
技术解决方案Technical solutions
本方案实施例提供了一种低压放电电路，与电芯连接，所述低压放电电路包括：The embodiment of the solution provides a low-voltage discharge circuit, which is connected to the battery core, and the low-voltage discharge circuit includes:
放电模块，用于驱动所述电芯放电，并获取所述电芯输出的放电电压信号，所述放电模块的电流正极端和所述放电模块的电压正极端均与所述电芯的正极连接，所述放电模块的电压负极端与所述电芯的负极连接；The discharge module is used to drive the battery to discharge and obtain the discharge voltage signal output by the battery. The positive current terminal of the discharge module and the positive voltage terminal of the discharge module are both connected to the positive terminal of the battery , The voltage negative terminal of the discharge module is connected to the negative terminal of the battery;
放电电压调节模块，用于接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，所述放电电压调节模块的电流负极端与所述放电模块的电流负极端连接，所述放电电压调节模块的电流正极端与所述电芯的负极连接。The discharge voltage adjustment module is configured to receive the discharge voltage signal and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal. The current negative terminal of the discharge voltage adjustment module is connected to the current negative terminal of the discharge module, The positive current terminal of the discharge voltage regulating module is connected with the negative electrode of the battery core.
可选的，所述放电模块还用于：Optionally, the discharge module is also used for:
控制所述电芯以第一电压阈值进行放电。The battery is controlled to discharge at a first voltage threshold.
可选的，所述放电模块为电芯检测设备。Optionally, the discharge module is a battery detection device.
可选的，所述放电模块还用于：Optionally, the discharge module is also used for:
获取所述电芯的放电电流信号，并在所述放电电流信号大于预设限流阈值时，关断所述电芯的放电输出。Obtain the discharge current signal of the battery cell, and turn off the discharge output of the battery cell when the discharge current signal is greater than a preset current limit threshold.
本方案还提供了一种应用于上述任一项所述的低压放电电路的低压放电方法，所述低压放电方法包括：This solution also provides a low-voltage discharge method applied to any one of the above-mentioned low-voltage discharge circuits, and the low-voltage discharge method includes:
采用放电模块驱动所述电芯放电，并获取所述电芯输出的放电电压信号；Using a discharging module to drive the battery to discharge, and obtain a discharge voltage signal output by the battery;
通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号。The discharge voltage adjustment module receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
可选的，所述通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，包括：Optionally, the receiving the discharge voltage signal through the discharge voltage adjustment module and outputting the corresponding auxiliary discharge voltage signal according to the discharge voltage signal includes:
通过放电电压调节模块获取所述放电电压信号的放电电压值；Obtaining the discharge voltage value of the discharge voltage signal through a discharge voltage adjustment module;
根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值；Acquiring a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value;
根据所述放电电压调节阈值调节所述辅助放电电压信号的电压值。The voltage value of the auxiliary discharge voltage signal is adjusted according to the discharge voltage adjustment threshold.
可选的，所述根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值，包括：Optionally, the obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
当所述放电电压值小于第一电压阈值，且大于或等于第二电压阈值时，所述放电电压调节阈值为0V；When the discharge voltage value is less than the first voltage threshold value and greater than or equal to the second voltage threshold value, the discharge voltage adjustment threshold value is 0V;
当所述放电电压值小于所述第二电压阈值，且大于或等于第三电压阈值时，所述放电电压调节阈值为第一预设放电电压调节阈值；When the discharge voltage value is less than the second voltage threshold value and greater than or equal to the third voltage threshold value, the discharge voltage adjustment threshold value is a first preset discharge voltage adjustment threshold value;
当所述放电电压值小于所述第三电压阈值，且大于或等于0V时，所述放电电压调节阈值为第二预设放电电压调节阈值。When the discharge voltage value is less than the third voltage threshold and greater than or equal to 0V, the discharge voltage adjustment threshold is a second preset discharge voltage adjustment threshold.
可选的，所述根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值，包括：Optionally, the obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
将所述放电电压调节阈值与所述放电电压值之和设置为所述第一电压阈值。The sum of the discharge voltage adjustment threshold value and the discharge voltage value is set as the first voltage threshold value.
可选的，所述低压放电方法还包括：Optionally, the low-voltage discharge method further includes:
将所述辅助放电电压信号的电压值设置为与所述第一电压阈值相同，以控制所述电芯进行负压放电。The voltage value of the auxiliary discharge voltage signal is set to be the same as the first voltage threshold to control the battery cell to perform negative voltage discharge.
本方案还提供了一种低压放电装置，所述低压放电装置包括:This solution also provides a low-voltage discharge device, which includes:
电芯；以及Battery cell; and
如上述任一项所述的低压放电电路，所述低压放电电路与所述电芯连接。In the low-voltage discharge circuit according to any one of the above, the low-voltage discharge circuit is connected to the battery core.
有益效果Beneficial effect
本方案提供了一种低压放电电路、低压放电方法及装置，所述低压放电电路与电芯连接，通过放电模块驱动电芯放电，并获取所述电芯输出的放电电压信号，并通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，其中，所述放电模块的电流正极端和所述放电模块的电压正极端均与所述电芯的正极连接，所述放电模块的电压负极端与所述电芯的负极连接，所述放电电压调节模块的电流负极端与所述放电模块的电流负极端连接，所述放电电压调节模块的电流正极端与所述电芯的负极连接，解决了现有的电池检测设备由于自身线路、半导体都存在阻抗，或者检测设备中使用的电容为有极性电容，导致电池检测设备无法实现低压放电及负压放电实验的问题。This solution provides a low-voltage discharge circuit, a low-voltage discharge method and device. The low-voltage discharge circuit is connected to the cell, drives the cell to discharge through the discharge module, and obtains the discharge voltage signal output by the cell, and passes the discharge voltage The adjustment module receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal. The positive current terminal of the discharge module and the positive voltage terminal of the discharge module are both the same as those of the battery cell. Positive connection, the voltage negative terminal of the discharge module is connected to the negative terminal of the battery, the current negative terminal of the discharge voltage regulation module is connected to the current negative terminal of the discharge module, and the current of the discharge voltage regulation module is positive The extreme is connected to the negative pole of the battery, which solves the problem that the existing battery testing equipment has impedance due to its own circuit and semiconductor, or the capacitor used in the testing equipment is a polar capacitor, which causes the battery testing equipment to fail to achieve low-voltage discharge and negative The problem of voltage discharge experiment.
附图说明Description of the drawings
图1为本方案的一个实施例提供的低压放电电路的结构示意图。Figure 1 is a schematic structural diagram of a low-voltage discharge circuit provided by an embodiment of the solution.
图2为本方案的一个实施例提供的应用于低压放电电路的低压放电方法的流程示意图。FIG. 2 is a schematic flowchart of a low-voltage discharge method applied to a low-voltage discharge circuit according to an embodiment of the solution.
图3为本方案的另一个实施例提供的应用于低压放电电路的低压放电方法的流程示意图。FIG. 3 is a schematic flowchart of a low-voltage discharge method applied to a low-voltage discharge circuit according to another embodiment of the solution.
本发明的实施方式Embodiments of the invention
为了使本方案的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本方案进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本方案，并不用于限定本方案。In order to make the purpose, technical solution, and advantages of the solution clearer, the solution will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the solution, and are not used to limit the solution.
本方案实施例提供了一种低压放电电路，与电芯10连接，所述低压放电电路包括：The embodiment of the solution provides a low-voltage discharge circuit, which is connected to the cell 10, and the low-voltage discharge circuit includes:
放电模块20，用于驱动所述电芯10放电，并获取所述电芯10输出的放电电压信号，所述放电模块20的电流正极端I2+和所述放电模块的电压正极端V2+均与所述电芯的正极V+连接，所述放电模块20的电压负极端V2-与所述电芯的负极V-连接；The discharge module 20 is used to drive the battery core 10 to discharge and obtain the discharge voltage signal output by the battery core 10. The positive current terminal I2+ of the discharge module 20 and the positive voltage terminal V2+ of the discharge module are both equal to The positive pole V+ of the battery is connected, and the voltage negative terminal V2- of the discharge module 20 is connected with the negative V- of the battery;
放电电压调节模块30，用于接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，所述放电电压调节模块30的电流负极端V3-与所述放电模块20的电流负极端V2-连接，所述放电电压调节模块30的电流正极端I3+与所述电芯10的负极V-连接。The discharge voltage adjustment module 30 is configured to receive the discharge voltage signal and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal. The current negative terminal V3- of the discharge voltage adjustment module 30 and the discharge module 20 The current negative terminal V2- is connected, and the current positive terminal I3+ of the discharge voltage regulating module 30 is connected to the negative electrode V- of the battery core 10.
在本实施例中，放电模块20驱动电芯10放电，并通过电压正极端V+和电压负极端V-与电芯10并联对电芯10输出的放电电压信号的电压值进行实时监测，另一方面，放电模块20的电流正极端I2+与电芯10的正极V+连接，通过放电模块20进行反向放电，以使电芯10放电，并根据电芯的放电电压调节放电电压调节模块30的放电电压，使得电芯10在低压下能够继续放电。In this embodiment, the discharge module 20 drives the cell 10 to discharge, and monitors the voltage value of the discharge voltage signal output by the cell 10 in real time through the voltage positive terminal V+ and the voltage negative terminal V- in parallel with the cell 10, and another On the other hand, the positive current terminal I2+ of the discharge module 20 is connected to the positive electrode V+ of the cell 10, and the discharge module 20 performs reverse discharge to discharge the cell 10, and adjusts the discharge of the discharge voltage adjustment module 30 according to the discharge voltage of the cell. The voltage enables the battery cell 10 to continue to discharge under low voltage.
在一个实施例中，现有的电芯检测设备为多通道设备，每个检测通道均可完成电芯的常规检测功能，放电模块20和放电电压调节模块30均可以采用电芯检测设备中的检测通道。In one embodiment, the existing battery detection equipment is a multi-channel device, and each detection channel can complete the conventional detection function of the battery. Both the discharge module 20 and the discharge voltage adjustment module 30 can use the battery detection equipment. Detection channel.
在一个实施例中，所述放电模块20为电芯检测设备。In one embodiment, the discharging module 20 is a battery detection device.
在一个实施例中，所述放电电压调节模块30可以为恒压调压源。In an embodiment, the discharge voltage regulating module 30 may be a constant voltage regulating source.
在一个实施例中，所述放电模块20还用于获取所述电芯的放电电流信号，并在所述放电电流信号大于预设限流阈值时，关断所述电芯的放电输出。In one embodiment, the discharging module 20 is further configured to obtain a discharge current signal of the battery cell, and when the discharge current signal is greater than a preset current limit threshold, turn off the discharge output of the battery cell.
在一个实施例中，所述放电模块20还用于：In an embodiment, the discharge module 20 is also used for:
控制所述电芯10以第一电压阈值进行放电。The battery cell 10 is controlled to discharge at a first voltage threshold.
在本实施例中，放电模块20可以对电芯10的放电电压进行控制，以使电芯10按照预设的第一电压阈值进行放电，具体的，第一电压阈值根据电芯10的类型进行设置。In this embodiment, the discharge module 20 can control the discharge voltage of the battery cell 10, so that the battery cell 10 is discharged according to a preset first voltage threshold. Specifically, the first voltage threshold is performed according to the type of the battery cell 10. Set up.
在一个实施例中，第一电压阈值可以设置为3V。In one embodiment, the first voltage threshold may be set to 3V.
在一个实施例中，所述放电电压调节模块30还用于：In an embodiment, the discharge voltage adjustment module 30 is further used for:
获取所述放电电压信号的放电电压值；Acquiring the discharge voltage value of the discharge voltage signal;
根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值；Acquiring a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value;
根据所述放电电压调节阈值调节所述辅助放电电压信号的电压值。The voltage value of the auxiliary discharge voltage signal is adjusted according to the discharge voltage adjustment threshold.
在本实施例中，放电电压调节模块30内设有放电电压调节关系表，该放电电压调节关系表中，放电电压值与放电电压调节阈值一一对应。放电电压调节模块30可以先根据放电电压值确定放电电压值所位于的放电电压阈值范围，其中，每个放电电压阈值范围对应一个放电电压调节阈值。In this embodiment, the discharge voltage adjustment module 30 is provided with a discharge voltage adjustment relationship table. In the discharge voltage adjustment relationship table, the discharge voltage value corresponds to the discharge voltage adjustment threshold value one-to-one. The discharge voltage adjustment module 30 may first determine the 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 a discharge voltage adjustment threshold.
在一个实施例中，本实施例中的放电电压调节模块内预设的放电电压调节关系表包括：In an embodiment, the discharge voltage adjustment relationship table preset in the discharge voltage adjustment module in this embodiment includes:
当所述放电电压值小于所述第一电压阈值，且大于或等于第二电压阈值时，所述放电电压调节阈值为0V；When the discharge voltage value is less than the first voltage threshold value and greater than or equal to the second voltage threshold value, the discharge voltage adjustment threshold value is 0V;
当所述放电电压值小于所述第二电压阈值，且大于或等于第三电压阈值时，所述放电电压调节阈值为第一预设放电电压调节阈值；When the discharge voltage value is less than the second voltage threshold value and greater than or equal to the third voltage threshold value, the discharge voltage adjustment threshold value is a first preset discharge voltage adjustment threshold value;
当所述放电电压值小于所述第三电压阈值，且大于或等于0V时，所述放电电压调节阈值为第二预设放电电压调节阈值。When the discharge voltage value is less than the third voltage threshold and greater than or equal to 0V, the discharge voltage adjustment threshold is a second preset discharge voltage adjustment threshold.
在一个实施例中，第二电压阈值可以为2V，第三电压阈值可以为1V，第一预设放电电压调节阈值可以为1V。In an 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.
在一个实施例中，第二预设放电电压调节阈值可以为2V。In an embodiment, the second preset discharge voltage adjustment threshold may be 2V.
在一个实施例中，本实施例中的放电电压调节模块内预设的放电电压调节关系表包括，包括：In an embodiment, the discharge voltage adjustment relationship table preset in the discharge voltage adjustment module in this embodiment includes:
将所述放电电压调节阈值与所述放电电压值之和设置为所述第一电压阈值。具体的，第一电压阈值=放电电压调节阈值+放电电压值，从而达到电芯放电平衡。The sum of the discharge voltage adjustment threshold value and the discharge voltage value is set as the first voltage threshold value. Specifically, the first voltage threshold=discharge voltage adjustment threshold+discharge voltage value, so as to achieve the cell discharge balance.
在一个实施例中，所述放电电压调节模块30还用于：In an embodiment, the discharge voltage adjustment module 30 is further used for:
将所述辅助放电电压信号的电压值设置为与所述第一电压阈值相同，以控制所述电芯进行负压放电。The voltage value of the auxiliary discharge voltage signal is set to be the same as the first voltage threshold to control the battery cell to perform negative voltage discharge.
图2为本方案的一个实施例提供的应用于上述任一项实施例所述的低压放电电路的低压放电方法的流程示意图，如图2所示，本实施例中的低压放电方法包括：FIG. 2 is a schematic flowchart of a low-voltage discharge method applied to the low-voltage discharge circuit described in any one of the above embodiments according to an embodiment of the solution. As shown in FIG. 2, the low-voltage discharge method in this embodiment includes:
步骤S10：采用放电模块驱动所述电芯放电，并获取所述电芯输出的放电电压信号；Step S10: Use a discharging module to drive the battery to discharge, and obtain a discharge voltage signal output by the battery;
步骤S20：通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号。Step S20: Receive the discharge voltage signal through the discharge voltage adjustment module, and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
在一个实施例中，参见图3所示，步骤S20：所述通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，包括：In one embodiment, referring to FIG. 3, step S20: receiving the discharge voltage signal through the discharge voltage adjustment module, and outputting a corresponding auxiliary discharge voltage signal according to the discharge voltage signal, includes:
步骤S21：通过放电电压调节模块获取所述放电电压信号的放电电压值；Step S21: Obtain the discharge voltage value of the discharge voltage signal through the discharge voltage adjustment module;
步骤S22：根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值；Step S22: Acquire a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value;
步骤S23：根据所述放电电压调节阈值调节所述辅助放电电压信号的电压值。Step S23: Adjust the voltage value of the auxiliary discharge voltage signal according to the discharge voltage adjustment threshold.
在本实施例中，放电电压调节模块内设有放电电压调节关系表，该放电电压调节关系表中，放电电压值与放电电压调节阈值一一对应。放电电压调节模块可以先根据放电电压值确定放电电压值所位于的放电电压阈值范围，其中，每个放电电压阈值范围对应一个放电电压调节阈值。In this embodiment, the discharge voltage adjustment module is provided with a discharge voltage adjustment relationship table. In the discharge voltage adjustment relationship table, the discharge voltage value corresponds to the discharge voltage adjustment threshold value one-to-one. The discharge voltage adjustment module may first determine the 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 a discharge voltage adjustment threshold.
在一个实施例中，根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值，包括：In an embodiment, obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
当所述放电电压值小于第一电压阈值，且大于或等于第二电压阈值时，所述放电电压调节阈值为0V；When the discharge voltage value is less than the first voltage threshold value and greater than or equal to the second voltage threshold value, the discharge voltage adjustment threshold value is 0V;
当所述放电电压值小于所述第二电压阈值，且大于或等于第三电压阈值时，所述放电电压调节阈值为第一预设放电电压调节阈值；When the discharge voltage value is less than the second voltage threshold value and greater than or equal to the third voltage threshold value, the discharge voltage adjustment threshold value is a first preset discharge voltage adjustment threshold value;
当所述放电电压值小于所述第三电压阈值，且大于或等于0V时，所述放电电压调节阈值为第二预设放电电压调节阈值。When the discharge voltage value is less than the third voltage threshold and greater than or equal to 0V, the discharge voltage adjustment threshold is a second preset discharge voltage adjustment threshold.
在一个实施例中，第一电压阈值可以设置为3V。In one embodiment, the first voltage threshold may be set to 3V.
在一个实施例中，第二电压阈值可以为2V，第三电压阈值可以为1V，第一预设放电电压调节阈值可以为1V。In an 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.
在一个实施例中，第二预设放电电压调节阈值可以为2V。In an embodiment, the second preset discharge voltage adjustment threshold may be 2V.
在一个实施例中，所述根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值，包括：In an embodiment, the obtaining the discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value includes:
将所述放电电压调节阈值与所述放电电压值之和设置为所述第一电压阈值。具体的，电芯在放电过程中，放电电压信号的电压值为第一电压阈值，第一电压阈值=放电电压调节阈值+放电电压值，从而达到电芯放电平衡。The sum of the discharge voltage adjustment threshold value and the discharge voltage value is set as the first voltage threshold value. Specifically, during the discharging process of the cell, the voltage value of the discharge voltage signal is the first voltage threshold, and the first voltage threshold=discharge voltage adjustment threshold+discharge voltage value, so as to achieve the cell discharge balance.
在一个实施例中，所述低压放电方法还包括：In an embodiment, the low-voltage discharge method further includes:
将所述辅助放电电压信号的电压值设置为与所述第一电压阈值相同，以控制所述电芯进行负压放电。The voltage value of the auxiliary discharge voltage signal is set to be the same as the first voltage threshold to control the battery cell to perform negative voltage discharge.
本方案实施例还提供了一种低压放电装置，所述低压放电装置包括:The embodiment of the solution also provides a low-voltage discharge device, which includes:
电芯；以及Battery cell; and
如上述任一项所述的低压放电电路，所述低压放电电路与所述电芯连接。In the low-voltage discharge circuit according to any one of the above, the low-voltage discharge circuit is connected to the battery core.
本方案提供了一种低压放电电路、低压放电方法及装置，所述低压放电电路与电芯连接，通过放电模块驱动电芯放电，并获取所述电芯输出的放电电压信号，并通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，其中，所述放电模块的电流正极端和所述放电模块的电压正极端均与所述电芯的正极连接，所述放电模块的电压负极端与所述电芯的负极连接，所述放电电压调节模块的电流负极端与所述放电模块的电流负极端连接，所述放电电压调节模块的电流正极端与所述电芯的负极连接，解决了现有的电池检测设备由于自身线路、半导体都存在阻抗，或者检测设备中使用的电容为有极性电容，导致电池检测设备无法实现低压放电及负压放电实验的问题。This solution provides a low-voltage discharge circuit, a low-voltage discharge method and device. The low-voltage discharge circuit is connected to the cell, drives the cell to discharge through the discharge module, and obtains the discharge voltage signal output by the cell, and passes the discharge voltage The adjustment module receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal. The positive current terminal of the discharge module and the positive voltage terminal of the discharge module are both the same as those of the battery cell. Positive connection, the voltage negative terminal of the discharge module is connected to the negative terminal of the battery, the current negative terminal of the discharge voltage regulation module is connected to the current negative terminal of the discharge module, and the current of the discharge voltage regulation module is positive The extreme is connected to the negative pole of the battery, which solves the problem that the existing battery testing equipment has impedance due to its own circuit and semiconductor, or the capacitor used in the testing equipment is a polar capacitor, which causes the battery testing equipment to fail to achieve low-voltage discharge and negative The problem of voltage discharge experiment.
以上所述仅为本方案的较佳实施例而已，并不用以限制本方案，凡在本方案的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本方案的保护范围之内。The above descriptions are only the preferred embodiments of this scheme, and are not used to limit this scheme. Any modification, equivalent replacement and improvement made within the spirit and principle of this scheme shall be included in the protection of this scheme. Within range.

Claims (10)

  1. 一种低压放电电路，与电芯连接，其特征在于，所述低压放电电路包括：A low-voltage discharge circuit connected to a battery cell, wherein the low-voltage discharge circuit includes:
    放电模块，用于驱动所述电芯放电，并获取所述电芯输出的放电电压信号，所述放电模块的电流正极端和所述放电模块的电压正极端均与所述电芯的正极连接，所述放电模块的电压负极端与所述电芯的负极连接；The discharge module is used to drive the battery to discharge and obtain the discharge voltage signal output by the battery. The positive current terminal of the discharge module and the positive voltage terminal of the discharge module are both connected to the positive terminal of the battery , The voltage negative terminal of the discharge module is connected to the negative terminal of the battery;
    放电电压调节模块，用于接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，所述放电电压调节模块的电流负极端与所述放电模块的电流负极端连接，所述放电电压调节模块的电流正极端与所述电芯的负极连接。The discharge voltage adjustment module is configured to receive the discharge voltage signal and output a corresponding auxiliary discharge voltage signal according to the discharge voltage signal. The current negative terminal of the discharge voltage adjustment module is connected to the current negative terminal of the discharge module, The positive current terminal of the discharge voltage regulating module is connected with the negative electrode of the battery core.
  2. 如权利要求1所述的低压放电电路，其特征在于，所述放电模块还用于：3. The low-voltage discharge circuit of claim 1, wherein the discharge module is further used for:
    控制所述电芯以第一电压阈值进行放电。The battery is controlled to discharge at a first voltage threshold.
  3. 如权利要求1所述的低压放电电路，其特征在于，所述放电模块为电芯检测设备。8. The low-voltage discharge circuit of claim 1, wherein the discharge module is a battery detection device.
  4. 如权利要求1所述的低压放电电路，其特征在于，所述放电模块还用于：3. The low-voltage discharge circuit of claim 1, wherein the discharge module is further used for:
    获取所述电芯的放电电流信号，并在所述放电电流信号大于预设限流阈值时，关断所述电芯的放电输出。Obtain the discharge current signal of the battery cell, and turn off the discharge output of the battery cell when the discharge current signal is greater than a preset current limit threshold.
  5. 一种应用于权利要求1-4任一项所述的低压放电电路的低压放电方法，其特征在于，所述低压放电方法包括：A low-voltage discharge method applied to the low-voltage discharge circuit of any one of claims 1 to 4, wherein the low-voltage discharge method comprises:
    采用放电模块驱动所述电芯放电，并获取所述电芯输出的放电电压信号；Using a discharging module to drive the battery to discharge, and obtain a discharge voltage signal output by the battery;
    通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号。The discharge voltage adjustment module receives the discharge voltage signal, and outputs a corresponding auxiliary discharge voltage signal according to the discharge voltage signal.
  6. 如权利要求5所述的低压放电方法，其特征在于，所述通过放电电压调节模块接收所述放电电压信号，并根据所述放电电压信号输出对应的辅助放电电压信号，包括：7. The low-voltage discharge method of claim 5, wherein the receiving the discharge voltage signal through the discharge voltage adjustment module and outputting the corresponding auxiliary discharge voltage signal according to the discharge voltage signal comprises:
    通过放电电压调节模块获取所述放电电压信号的放电电压值；Obtaining the discharge voltage value of the discharge voltage signal through a discharge voltage adjustment module;
    根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值；Acquiring a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value;
    根据所述放电电压调节阈值调节所述辅助放电电压信号的电压值。The voltage value of the auxiliary discharge voltage signal is adjusted according to the discharge voltage adjustment threshold.
  7. 如权利要求6所述的低压放电方法，其特征在于，所述根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值，包括：7. The low-voltage discharge method according to claim 6, wherein the obtaining a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value comprises:
    当所述放电电压值小于第一电压阈值，且大于或等于第二电压阈值时，所述放电电压调节阈值为0V；When the discharge voltage value is less than the first voltage threshold value and greater than or equal to the second voltage threshold value, the discharge voltage adjustment threshold value is 0V;
    当所述放电电压值小于所述第二电压阈值，且大于或等于第三电压阈值时，所述放电电压调节阈值为第一预设放电电压调节阈值；When the discharge voltage value is less than the second voltage threshold value and greater than or equal to the third voltage threshold value, the discharge voltage adjustment threshold value is a first preset discharge voltage adjustment threshold value;
    当所述放电电压值小于所述第三电压阈值，且大于或等于0V时，所述放电电压调节阈值为第二预设放电电压调节阈值。When the discharge voltage value is less than the third voltage threshold and greater than or equal to 0V, the discharge voltage adjustment threshold is a second preset discharge voltage adjustment threshold.
  8. 如权利要求6所述的低压放电方法，其特征在于，所述根据所述放电电压值从预设的放电电压调节关系表中获取与所述放电电压值对应的放电电压调节阈值，包括：7. The low-voltage discharge method according to claim 6, wherein the obtaining a discharge voltage adjustment threshold corresponding to the discharge voltage value from a preset discharge voltage adjustment relationship table according to the discharge voltage value comprises:
    将所述放电电压调节阈值与所述放电电压值之和设置为所述第一电压阈值。The sum of the discharge voltage adjustment threshold value and the discharge voltage value is set as the first voltage threshold value.
  9. 如权利要求5所述的低压放电方法，其特征在于，所述低压放电方法还包括：7. The low-voltage discharge method of claim 5, wherein the low-voltage discharge method further comprises:
    将所述辅助放电电压信号的电压值设置为与所述第一电压阈值相同，以控制所述电芯进行负压放电。The voltage value of the auxiliary discharge voltage signal is set to be the same as the first voltage threshold to control the battery cell to perform negative voltage discharge.
  10. 一种低压放电装置，其特征在于，所述低压放电装置包括:A low-voltage discharge device, characterized in that the low-voltage discharge device includes:
    电芯；以及Battery cell; and
    如权利要求1-4任一项所述的低压放电电路，所述低压放电电路与所述电芯连接。The low-voltage discharge circuit according to any one of claims 1 to 4, wherein the low-voltage discharge circuit is connected to the battery core.
PCT/CN2019/092812 2019-03-22 2019-06-25 Low-voltage discharge circuit and low-voltage discharge method and apparatus WO2020191932A1 (en)

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