WO2023035392A1 - Series detection system for formation and capacity grading of lithium power battery - Google Patents

Series detection system for formation and capacity grading of lithium power battery Download PDF

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Publication number
WO2023035392A1
WO2023035392A1 PCT/CN2021/128844 CN2021128844W WO2023035392A1 WO 2023035392 A1 WO2023035392 A1 WO 2023035392A1 CN 2021128844 W CN2021128844 W CN 2021128844W WO 2023035392 A1 WO2023035392 A1 WO 2023035392A1
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WIPO (PCT)
Prior art keywords
battery
module
series
switch
main circuit
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PCT/CN2021/128844
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French (fr)
Chinese (zh)
Inventor
张兴旺
孙君光
秦茂
赖前程
解建伟
杨康佳
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广州擎天实业有限公司
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Priority to KR1020247011285A priority Critical patent/KR20240058910A/en
Publication of WO2023035392A1 publication Critical patent/WO2023035392A1/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
    • G01R31/387—Determining ampere-hour charge capacity or SoC
    • G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0425—Test clips, e.g. for IC's
    • 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]
    • G01R31/3644—Constructional arrangements
    • 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]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables
    • 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]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • 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

  • the invention relates to the technical field of detection of composition and capacity of lithium ion secondary batteries, in particular to a series detection system of composition and capacity of lithium power batteries.
  • lithium power battery series detection technology can significantly improve battery series charging and discharging due to efficiency improvement and battery consistency.
  • the battery cells have gradually developed from a few ampere-hours, tens of ampere-hours to hundreds of ampere-hours, and the system capacity of series-connected batteries is getting larger and larger; other process requirements are also getting higher and higher, such as single
  • the battery is discharged to a very low voltage (below 1V, even to 0V), etc.
  • a new topology must be invented. For example, adopt multi-power module parallel mode, add power supply module, etc.
  • An embodiment of the present invention provides a series detection system for the composition and capacity of lithium power batteries, including:
  • a bidirectional power module includes at least one AC-DC module and at least one DC-DC module, and the bidirectional power module provides different power through different combinations of the AC-DC module and the DC-DC module , form a series circuit with different numbers of batteries to realize battery charging and discharging;
  • the battery series main circuit is connected to the bidirectional power module and the supplementary power supply.
  • the battery series main circuit includes several switch control modules and several batteries connected in series, each of the switch control modules is used to control a single battery connection or log out online;
  • the supplementary power supply is connected in series with the battery series main circuit, and is used to increase the voltage of the battery series main circuit, so as to continue charging and discharging when there is only one battery left in the battery series main circuit, until the formation is satisfied. Or the cut-off voltage of the sub-capacity process;
  • a press including a probe or a fixture, the probe or the fixture is connected to the switch control module through a cable, and the press also includes a pressing mechanism, and the pressing mechanism realizes the normalization of the battery through electrical control.
  • the negative electrode is in contact with the probe or the clamp, so that the battery is connected to the switch control module;
  • the control system is the hub of information collection, control, and interaction.
  • the control system controls the press-fitting mechanism to connect the battery with the probe or the fixture during the process of chemical composition and containment process, and through
  • the switch control module connects the battery in series to the battery series main circuit, controls the bidirectional power module to charge and discharge the battery on the battery series main circuit, collects battery data in real time, and controls the battery to exit online and /or perform security control operations for chemical composition and volumetric processes;
  • the monitoring center is used to issue execution instructions of the capacity-forming process flow, monitor the operation status of the capacity-dividing process flow according to the battery data, and store, count and analyze the battery data.
  • the battery capacity detection system provided by the embodiment of the present invention has at least the following beneficial effects: the embodiment of the present invention provides different power through different combinations of the AC-DC module and the DC-DC module in the bidirectional power module, and can cope with different A large number of batteries have different current requirements when performing series formation or capacity division processes, so as to adapt to the flexible and changeable detection requirements of batteries; in addition, the embodiment of the present invention also provides a supplementary power supply connected in series with the battery series main circuit, which can improve battery series connection. The voltage of the main circuit can continue to charge and discharge when there is only one battery left in the main circuit of the battery series, until it meets the cut-off voltage of the forming or capacity dividing process.
  • the AC-DC module includes a first input end and a first output end
  • the DC-DC module includes a second input end and a second output end
  • the first input end is connected to an AC grid
  • the first output end is connected to the second input end
  • the second output end is connected to the battery series main circuit.
  • the AC-DC includes two modes, one is a power frequency transformer-isolated AC-DC, the other is a high-frequency transformer-isolated AC-DC, and the AC-DC module is two Above, the AC-DC modules are connected in parallel, the control system adopts current sharing control between the AC-DC modules, the DC-DC modules are more than two, and the DC-DC modules connected in parallel, the control system adopts current sharing control between the DC-DC modules.
  • the probes include current probes and voltage probes
  • the clamps include current clamps and voltage clamps
  • the press system is used to connect the positive and negative electrodes of the batteries on the battery tray to the The current probe or the current clamp, the voltage probe or the voltage clamp are contacted by pressing.
  • the switch control module includes a direct switch module and a bypass switch module, the direct switch module is connected in series with the battery, and the bypass switch module is connected in parallel to the branch formed by the direct switch module and the battery,
  • Each of the switch control modules independently controls each of the batteries connected in series to the battery series main circuit or withdrawn from the battery series main circuit.
  • the direct switch module and the bypass switch module are obtained by combining several electronic switch tubes according to the battery series structure and charging and discharging requirements, and the direct switch module and the bypass switch module are interlocked Control to realize the function of preventing the battery from being reversed and the battery from being withdrawn online.
  • the direct switch module and the bypass switch module include electrical control switches, and diodes are connected in parallel to the electrical control switches.
  • the supplementary power supply is a bidirectional DC power supply capable of rectification and inversion
  • the detection system includes at least one supplementary power supply to increase the DC side voltage of the bidirectional power module.
  • control system further includes an acquisition module, the acquisition module includes a voltage detection module for detecting battery voltage, a current detection module for detecting battery current, and a temperature detection module for detecting battery temperature,
  • acquisition module includes a voltage detection module for detecting battery voltage, a current detection module for detecting battery current, and a temperature detection module for detecting battery temperature
  • the control system is also used for receiving the execution instruction issued by the monitoring center and uploading the battery data to the monitoring center, the battery data including battery voltage, battery current and battery temperature.
  • the press is used to control the probe or the clamp to contact or separate from the battery according to the execution instruction issued by the monitoring center.
  • Fig. 1 is a schematic diagram of the structural connection of a detection system provided by an embodiment of the present invention
  • Fig. 2 is a schematic circuit diagram of a direct switch and a bypass switch connected to a battery provided by an embodiment of the present invention
  • 3-5 are three circuit diagrams of a switch module provided by an embodiment of the present invention.
  • 6-9 are schematic diagrams of module connection of a bidirectional power module provided by an embodiment of the present invention.
  • Figures 10-12 are schematic diagrams of the connection between the two-way power module and the location configuration relationship provided by an embodiment of the present invention.
  • the formation and capacity separation equipment of lithium power batteries usually adopts the formation or capacity separation process in the form of batteries connected in parallel, and each channel corresponds to a battery for charging and discharging.
  • N power lines from the power supply to the battery lead to problems such as multiple power loops, large device and line losses, and high equipment costs. If the batteries are connected in series for formation or capacity division, only one series circuit and one power supply are needed to keep the current on the series circuit consistent, which is beneficial to improve the performance of the battery, save cables and reduce the lines on the cables loss.
  • the embodiment of the present invention provides a series detection system for lithium power battery composition and capacity. Based on the form of battery series composition and capacity, a set of full-process detection system for composition and capacity is constructed, and the current of different numbers of batteries In the case of different requirements, the combination of AC-DC module and DC-DC module is used to provide matching current for the battery to meet the requirements of different chemical capacity scenarios.
  • an embodiment of the present invention provides a detection system, including:
  • a bidirectional power module includes at least one AC-DC module and at least one DC-DC module, and the bidirectional power module provides different power through different combinations of the AC-DC module and the DC-DC module , form a series circuit with different numbers of batteries to realize battery charging and discharging;
  • the battery series main circuit is connected to the bidirectional power module and the supplementary power supply.
  • the battery series main circuit includes several switch control modules and several batteries connected in series, each of the switch control modules is used to control a single battery connection or log out online;
  • the supplementary power supply is connected in series with the battery series main circuit, and is used to increase the voltage of the battery series main circuit, so as to continue charging and discharging when there is only one battery left in the battery series main circuit, until the formation is satisfied. Or the cut-off voltage of the sub-capacity process;
  • a press including a probe or a fixture, the probe or the fixture is connected to the switch control module through a cable, and the press also includes a pressing mechanism, and the pressing mechanism realizes the normalization of the battery through electrical control.
  • the negative electrode is in contact with the probe or the clamp, so that the battery is connected to the switch control module;
  • the control system is the hub of information collection, control, and interaction.
  • the control system controls the press-fitting mechanism to connect the battery with the probe or the fixture during the process of chemical composition and containment process, and through
  • the switch control module connects the battery in series to the battery series main circuit, controls the bidirectional power module to charge and discharge the battery on the battery series main circuit, collects battery data in real time, and controls the battery to exit online and /or perform security control operations for chemical composition and volumetric processes;
  • the monitoring center is used to issue execution instructions of the capacity-forming process flow, monitor the operation status of the capacity-dividing process flow according to the battery data, and store, count and analyze the battery data.
  • the battery series main circuit is set in the storage space of the detection system.
  • the battery series main circuit is formed by connecting several switch control modules in series.
  • Each switch control module can be connected to a single battery to control the battery.
  • the battery is charged and discharged, so that the series connection of the battery is realized through the series switch control module. Due to the characteristics of the series circuit, the disconnection of a certain point in the series connection will cause the disconnection of the entire series circuit. Therefore, the capacity detection system of the battery series composition in the embodiment of the present invention has the function of battery online withdrawal.
  • the switch control module includes a direct switch and a bypass switch. When disconnected, the bidirectional power module can charge and discharge the battery.
  • the direct circuit switch and the bypass switch adopt interlocking control, which can prevent the short circuit of the battery and the open circuit of the series circuit during the online switching process of the current from the direct circuit to the bypass.
  • the direct switch and the bypass switch are combined by electronic switch tubes according to different battery structures and requirements, and can be placed in different positions. Please refer to the circuit connection schematic diagram in Figure 2.
  • the structures of the straight-through switch and the bypass switch are described below through specific examples.
  • the direct switch includes a first switch tube and a second switch tube
  • the bypass switch includes a third switch tube
  • the first switch tube, the second switch tube, and the third switch tube are all A body diode or a unidirectional diode is connected in parallel, the first switch tube and the second switch tube are connected in series, and the first switch tube and the third switch tube are connected at one pole.
  • the first switch tube, the second switch tube and the third switch tube as MOSFETs as an example, the first switch tube, the second switch tube and the third switch tube all have body diodes, and the direction of the body diodes is from source to drain In the direction of poles, in terms of circuit structure, the first switching tube and the second switching tube are in the same branch, and the first switching tube and the third switching tube are respectively in two branches connected by one pole. It can be seen from Figure 2 that when the battery has been connected to the direct circuit switch, the first switch tube and the second switch tube are turned on, and the third switch tube is cut off.
  • each switch control module can be independently controlled to realize the online withdrawal of the battery without affecting other batteries in the battery series main circuit.
  • MOSFET is only one implementation manner of the switch tube, and the above-mentioned switch tube can also be implemented by using an IGBT, a relay connected in parallel with a diode, and the like.
  • the direct switch includes a first switch tube and a second switch tube
  • the bypass switch includes a third switch tube and a fourth switch tube
  • Both the third switch tube and the fourth switch tube have a body diode or a one-way diode connected in parallel
  • the first switch tube and the second switch tube are connected in series
  • the first switch tube and the third switch tube are connected to one pole.
  • the first switching tube, the second switching tube, the third switching tube and the fourth switching tube as MOSFETs as an example
  • the first switching tube, the second switching tube, the third switching tube and the fourth switching tube all have body diodes
  • the direction of the body diode is from the source to the drain.
  • the first switch tube and the second switch tube are in the same branch, and the third switch tube and the fourth switch tube are in the same branch.
  • the first switch tube is in the same branch.
  • the switch tube and the third switch tube are respectively in two branches connected with one pole. It can be seen from Figure 3 that when the battery has been connected to the direct circuit switch, the first switch tube and the second switch tube are turned on, and the third switch tube is turned off.
  • each switch control module can be independently controlled to realize the online withdrawal of the battery. It will not affect other batteries in the battery series main circuit.
  • MOSFET is only one implementation manner of the switch tube, and the above-mentioned switch tube can also be implemented by using an IGBT, a relay connected in parallel with a diode, and the like.
  • the series position relationship between the first switch tube, the second switch tube and the battery can be adjusted as required.
  • the first switch tube, the battery and the second switch tube are connected in series in sequence.
  • the embodiment of the present invention does not limit the series positional relationship between the first switch tube and the second switch tube and the battery, nor does it limit the straight switch to only be composed of the first switch tube and the second switch tube, and of course does not limit the bypass switch It can only be composed of the third switching tube and the fourth switching tube. Since there are many ways of composition, they will not be listed here one by one. Realizing the battery online exit function through the electronic switch should be within the scope of protection of the present invention.
  • the installation combinations of the above switch control modules are diverse, and can be customized according to different battery requirements and the installation space of the storage location. They can be installed individually or in combination.
  • a single switch control module can be installed on the PCB board.
  • a single switch control module can also be packaged in one installation box, multiple switch control modules can be collectively installed on the PCB board, or multiple switch control modules can be packaged in one installation box.
  • the AC-DC in the bidirectional power module includes two modes, one is the power frequency transformer isolated AC-DC, and the other is the high frequency transformer isolated AC-DC.
  • the AC-DC module includes a first input end and a first output end
  • the DC-DC module includes a second input end and a second output end, the first input end is connected to an AC source, the first output end is connected to a second input end, and the second The output terminal is connected to the battery series main circuit. It should be noted that the bidirectional power module can be implemented in various ways, and several specific ways will be described below as examples.
  • the bidirectional power module includes an AC-DC module and a DC-DC module, the first input terminal of the AC-DC module is connected to the three-phase AC input, and the first output terminal of the AC-DC module is a DC output and connected to the DC - the second input terminal of the DC module, the second output terminal of the DC-DC module is also a DC output and connected to the input terminal of the battery series main circuit to provide a DC source for the battery series main circuit.
  • the bidirectional power module includes a plurality of AC-DC modules and a DC-DC module, the first input ends of the plurality of AC-DC modules are connected to the three-phase AC input, and the first output ends of the plurality of AC-DC modules Both are connected to the second input terminal of the DC-DC module, and the second output terminal of the DC-DC module is connected to the input terminal of the battery series main circuit, wherein a plurality of AC-DC modules are connected in parallel, and the AC-DC module Between the use of current control.
  • the bidirectional power module includes an AC-DC module and multiple DC-DC modules, the first input terminal of the AC-DC module is connected to the three-phase AC input, and the first output terminal of the AC-DC module separates multiple The first line is connected to the second input end of multiple DC-DC modules, and the second output end of multiple DC-DC modules is connected to the input end of the battery series main circuit in parallel, wherein the multiple DC-DC modules are connected in parallel, Current sharing control is adopted between DC-DC modules.
  • the bidirectional power module includes a plurality of AC-DC modules and a plurality of DC-DC modules, the first input ends of the plurality of AC-DC modules are connected to the three-phase AC input, and the first outputs of the plurality of AC-DC modules Multiple lines are separated from the terminal and connected to the second input terminals of multiple DC-DC modules, and the second output terminals of multiple DC-DC modules are connected to the input terminals of the battery series main circuit.
  • multiple AC-DC modules In parallel connection current sharing control is adopted between AC-DC modules; when multiple DC-DC modules are in parallel connection, current sharing control is adopted between DC-DC modules.
  • the embodiments of the present invention provide corresponding power through different combinations of AC-DC modules and DC-DC modules.
  • the input terminal of the bidirectional power module is connected to the AC grid (usually connected to 380V AC or 220V AC), which provides the functions of taking power from the AC grid and feeding back the power of the battery to the AC grid.
  • the above-mentioned supplementary power supply is a bidirectional DC power supply with rectification and inverter capabilities
  • the detection system includes at least one supplementary power supply (one or more than two connected in parallel) to increase the voltage of the battery series main circuit and realize battery In the series main circuit, when there is only one battery left, it can still continue to charge and discharge until the cut-off voltage of the formation or capacity separation process is met.
  • the supplementary power supply can be set in different positions in the battery series main circuit. For example, it is set between the battery and the battery of the battery series main circuit, and is set at the starting position or the end position of the battery series main circuit, etc. starting position), which is not limited here.
  • one bidirectional power module can correspond to one chemical storage location.
  • a bidirectional power module when there are multiple chemical storage locations, the chemical storage locations are connected in series through a battery series circuit, and the ACDC and DCDC combinations inside a bidirectional power module can refer to the one-to-one configuration shown in Figures 6 to 9 above. , many-to-one, one-to-many, and many-to-many combinations, if a bidirectional power module can provide enough power for the batteries in these composition storage locations, then one bidirectional power module can correspond to multiple composition storage locations . In some cases, if one bidirectional power module cannot provide enough power for the batteries in these compartmentalized storage locations, two or more bidirectional power modules can be used to combine these bidirectional power modules (such as connected in parallel via cables) to provide enough power for the battery.
  • the press includes a cylinder, a battery tray and a battery probe.
  • the cylinder is controlled electrically, and the position of the battery tray is controlled by the cylinder to control the contact between the battery probe and the positive and negative poles of the battery.
  • the battery probe includes a current probes and voltage probes.
  • the press is a working platform for mechanical transmission and crimping of battery automation production.
  • the control system sends control signals to the press, and the press can control the pallet to rise and fall according to the control signal, and control the contact between the battery probe and the positive and negative electrodes of the battery. , to complete the physical connection between the battery series main circuit and the battery, etc.
  • the press also includes functions such as negative pressure control, tray detection, cylinder position detection, and smoke alarm, which will not be described in detail here.
  • the press can also adopt a jig-type or other mechanical structure to meet the mechanical operation requirements of different chemical composition and capacity of the battery, which will not be listed here.
  • the battery probe in the above-mentioned press can be replaced by a battery clamp, and the battery clamp performs a process of dividing or dividing the battery by contacting the positive and negative electrodes of the battery.
  • the clamp includes a current clamp and a voltage clamp.
  • the detection system in the embodiment of the present invention also includes an information collection module, the information collection module includes a voltage detection module for detecting the battery voltage, the voltage detection module is connected to the control system signal, and the control system can monitor the battery in real time by receiving the voltage signal from the collection module operating conditions to avoid overvoltage and overcurrent of the battery.
  • the detection system in the embodiment of the present invention may also include other auxiliary modules, such as a temperature sensor that collects the temperature of the positive pole and the negative pole of the battery to provide over-temperature monitoring for the detection system.
  • auxiliary modules can be set by themselves according to monitoring needs, and will not be listed here.
  • the battery series main circuit of the embodiment of the present invention also has the function of preventing battery reverse connection.
  • the voltage detection module can learn the voltage situation in the battery series main circuit. In the normal voltage range (for example, the positive and negative voltages are reversed), the control system can issue an alarm or disconnect the switch control module currently connected to the battery to avoid the risk of battery reverse connection.
  • the specific connection relationship of the detection system in the embodiment of the present invention can refer to Figure 1, including multiple components, mainly monitoring center, control system, bidirectional power module, battery series main circuit, supplementary power supply, press (including battery tray),
  • the various parts are interconnected through the internal bus to complete functions such as command sending, execution and information interaction.
  • the monitoring center edits and distributes the process according to the needs of the battery formation and capacity process, including working step status, working step time, current, upper limit voltage, lower limit voltage, cut-off current, cut-off capacity, working step protection parameters and negative pressure parameters, etc.
  • Parameter setting is also responsible for data display and data analysis, that is, displaying the working step status, working step time, battery voltage, current, capacity, energy, current line voltage, auxiliary voltage, battery positive temperature, and battery negative temperature of each series battery In addition, it also monitors the operating conditions of the series batteries and displays fault alarms.
  • the control system is used for system control and information collection, information interaction with the monitoring center, and interactive control and command transmission with the bidirectional power module, battery series main circuit, power supply, press, etc. According to the technical process of component capacity, the on and off commands are sent to the battery series main circuit to realize the on-off control of the direct switch and the bypass switch.
  • the control system also receives the operating condition data of all batteries in the battery series main circuit, and performs data processing. After processing, it is sent to the monitoring center.
  • the detection system for the above-mentioned lithium power battery in series into capacity realizes the series connection of the batteries through the battery series main circuit in the capacity out storage position, and at the same time, the control system can independently control each battery in the capacity out process through a separate switch control module.
  • the bidirectional power module of the present invention provides different power by adopting different combinations of AC-DC modules and DC-DC modules, so as to meet different requirements when different numbers of batteries are used for the formation and capacity process. current demand.

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  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

Disclosed in the present invention is a series detection system for formation and capacity grading of a lithium power battery. The detection system comprises a battery series main circuit, a bidirectional power module, a charging power supply, a press machine, a control system, and a monitoring center, wherein the battery series main circuit comprises a plurality of batteries and switch control modules used for connecting the batteries in series; the bidirectional power module comprises at least one AC-DC module and at least one DC-DC module; and the press machine comprises a press fit mechanism and a probe or a clamp. The bidirectional power module of embodiments of the present invention provides different power by using different combination modes of the AC-DC module and the DC-DC module; series connection of the batteries is realized by means of the battery series main circuit; by means of cooperative control of the bidirectional power module, the battery series main circuit, the charging power supply, and the press machine, a series charge/discharge function of the plurality of batteries is realized, and online exit of a single battery is realized, such that process requirements of formation or capacity grading of the lithium power battery are satisfied, and particularly, requirements can still be satisfied when the discharge voltage of the single battery is required to be very low.

Description

一种锂动力电池化成分容的串联检测***A series detection system for the composition and capacity of lithium power batteries 技术领域technical field
本发明涉及锂离子二次电池化成分容检测技术领域，尤其涉及一种锂动力电池化成分容的串联检测***。The invention relates to the technical field of detection of composition and capacity of lithium ion secondary batteries, in particular to a series detection system of composition and capacity of lithium power batteries.
背景技术Background technique
锂离子二次电池生产工序繁多，在注液之后的后处理环节，化成、分容是电池后处理环节中最为关键的工序，需要检测设备来进行充放电。通过化成工序来激活电池；通过分容工序进行容量分选、性能筛选分级。传统的化成、分容检测***使用的是并联技术方案,即每个电池化成、分容采用独立的充放电电源，该方案在能效、精度等性能方面已经难以得到较大提升和突破。There are many production processes of lithium-ion secondary batteries. In the post-processing link after liquid injection, formation and capacity separation are the most critical processes in the post-processing link of batteries, and testing equipment is required for charging and discharging. The battery is activated through the formation process; capacity sorting and performance screening are performed through the capacity separation process. The traditional formation and capacity separation detection system uses a parallel technology solution, that is, each battery formation and capacity separation uses an independent charging and discharging power supply. This solution has been difficult to achieve major improvements and breakthroughs in terms of energy efficiency and accuracy.
锂动力电池串联检测技术作为一种新技术，能显著提高电池串联充放电由于效率提升和提升电池的一致性。随着锂电池容量的加大，电芯从几安时、几十安时逐步发展到几百安时，串联电池的***容量越来越大；另外一些工艺要求也越来越高，如单电池放电到电压很低(1V以下，甚至到0V)等，为适应这些新要求，必须发明全新的拓扑架构。如采用多功率模块并联模式，增加补电模块等。As a new technology, lithium power battery series detection technology can significantly improve battery series charging and discharging due to efficiency improvement and battery consistency. With the increase of lithium battery capacity, the battery cells have gradually developed from a few ampere-hours, tens of ampere-hours to hundreds of ampere-hours, and the system capacity of series-connected batteries is getting larger and larger; other process requirements are also getting higher and higher, such as single The battery is discharged to a very low voltage (below 1V, even to 0V), etc. In order to meet these new requirements, a new topology must be invented. For example, adopt multi-power module parallel mode, add power supply module, etc.
发明内容Contents of the invention
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.
本发明实施例提供了一种锂动力电池化成分容的串联检测***，包括：An embodiment of the present invention provides a series detection system for the composition and capacity of lithium power batteries, including:
双向功率模块，所述双向功率模块包括至少一个AC-DC模块和至少一个DC-DC模块，所述双向功率模块通过所述AC-DC模块与所述DC-DC模块的不同组合方式提供不同功率，与不同数量电池组成串联电路，实现电池充放电；A bidirectional power module, the bidirectional power module includes at least one AC-DC module and at least one DC-DC module, and the bidirectional power module provides different power through different combinations of the AC-DC module and the DC-DC module , form a series circuit with different numbers of batteries to realize battery charging and discharging;
电池串联主电路，连接所述双向功率模块和补电电源，所述电池串联主电路包括串联连接的若干个开关控制模块和若干个电池，每个所述开关控制模块用于控制单个所述电池的连接或在线退出；The battery series main circuit is connected to the bidirectional power module and the supplementary power supply. The battery series main circuit includes several switch control modules and several batteries connected in series, each of the switch control modules is used to control a single battery connection or log out online;
补电电源，与所述电池串联主电路串联连接，用于提高所述电池串联主电路的电压，实现在所述电池串联主电路仅剩一个所述电池的情况下继续充放电，直至满足化成或分容工艺的截止电压；The supplementary power supply is connected in series with the battery series main circuit, and is used to increase the voltage of the battery series main circuit, so as to continue charging and discharging when there is only one battery left in the battery series main circuit, until the formation is satisfied. Or the cut-off voltage of the sub-capacity process;
压床，包括探针或夹具，所述探针或所述夹具通过线缆与所述开关控制模块连接，所述压床还包括压合机构，所述压合机构通过电气控制实现电池的正负极与所述探针或所述夹具接触，以使所述电池接入到所述开关控制模块；A press, including a probe or a fixture, the probe or the fixture is connected to the switch control module through a cable, and the press also includes a pressing mechanism, and the pressing mechanism realizes the normalization of the battery through electrical control. The negative electrode is in contact with the probe or the clamp, so that the battery is connected to the switch control module;
控制***，是信息采集、控制、交互的枢纽，所述控制***在执行化成分容工艺流程的过程中，控制所述压合机构将所述电池与所述探针或所述夹具连接、通过所述开关控制模块将所述电池串联接入所述电池串联主电路、控制所述双向功率模块对所述电池串联主电路上的电池进行充放电，并实时采集电池数据，控制电池在线退出和/或执行化成分容工艺流程的 安全管控操作；The control system is the hub of information collection, control, and interaction. The control system controls the press-fitting mechanism to connect the battery with the probe or the fixture during the process of chemical composition and containment process, and through The switch control module connects the battery in series to the battery series main circuit, controls the bidirectional power module to charge and discharge the battery on the battery series main circuit, collects battery data in real time, and controls the battery to exit online and /or perform security control operations for chemical composition and volumetric processes;
监控中心，用于下发化成分容工艺流程的执行指令、根据所述电池数据监控分容工艺流程的运行状况以及存储、统计、分析所述电池数据。The monitoring center is used to issue execution instructions of the capacity-forming process flow, monitor the operation status of the capacity-dividing process flow according to the battery data, and store, count and analyze the battery data.
本发明实施例提供的电池串联化成分容的检测***，至少具有如下有益效果：本发明实施例通过双向功率模块中AC-DC模块与DC-DC模块不同的组合方式提供不同的功率，应对不同数量的电池进行串联化成或分容工艺时不同的电流需求，从而适应电池灵活多变的检测需求；另外，本发明实施例还提供与电池串联主电路串联连接的补电电源，可以提高电池串联主电路的电压，实现在电池串联主电路仅剩一个电池的情况下仍然能够继续充放电，直至满足化成或分容工艺的截止电压。The battery capacity detection system provided by the embodiment of the present invention has at least the following beneficial effects: the embodiment of the present invention provides different power through different combinations of the AC-DC module and the DC-DC module in the bidirectional power module, and can cope with different A large number of batteries have different current requirements when performing series formation or capacity division processes, so as to adapt to the flexible and changeable detection requirements of batteries; in addition, the embodiment of the present invention also provides a supplementary power supply connected in series with the battery series main circuit, which can improve battery series connection. The voltage of the main circuit can continue to charge and discharge when there is only one battery left in the main circuit of the battery series, until it meets the cut-off voltage of the forming or capacity dividing process.
在一些实施例中，所述AC-DC模块包括第一输入端和第一输出端，所述DC-DC模块包括第二输入端和第二输出端，所述第一输入端连接交流电网，所述第一输出端连接所述第二输入端，所述第二输出端连接所述电池串联主电路。In some embodiments, the AC-DC module includes a first input end and a first output end, the DC-DC module includes a second input end and a second output end, and the first input end is connected to an AC grid, The first output end is connected to the second input end, and the second output end is connected to the battery series main circuit.
在一些实施例中，所述AC-DC包括两种模式，一种是工频变压器隔离型AC-DC，另一种是高频变压器隔离型AC-DC，所述AC-DC模块为两个以上，所述AC-DC模块之间并联连接，所述控制***对所述AC-DC模块之间采用均流控制，所述DC-DC模块为两个以上，所述DC-DC模块之间并联连接，所述控制***对所述DC-DC模块之间采用均流控制。In some embodiments, the AC-DC includes two modes, one is a power frequency transformer-isolated AC-DC, the other is a high-frequency transformer-isolated AC-DC, and the AC-DC module is two Above, the AC-DC modules are connected in parallel, the control system adopts current sharing control between the AC-DC modules, the DC-DC modules are more than two, and the DC-DC modules connected in parallel, the control system adopts current sharing control between the DC-DC modules.
在一些实施例中，所述探针包括电流探针和电压探针，所述夹具包括电流夹具和电压夹具，所述压床***用于将电池托盘上的电池的正负极分别与所述电流探针或所述电流夹具、所述电压探针或所述电压夹具通过压合后接触。In some embodiments, the probes include current probes and voltage probes, the clamps include current clamps and voltage clamps, and the press system is used to connect the positive and negative electrodes of the batteries on the battery tray to the The current probe or the current clamp, the voltage probe or the voltage clamp are contacted by pressing.
在一些实施例中，所述开关控制模块包括直路开关模块和旁路开关模块，所述直路开关模块与电池串联，所述旁路开关模块并联于所述直路开关模块与电池组成的支路，每个所述开关控制模块独立控制每个所述电池串联接入所述电池串联主电路或者退出所述电池串联主电路。In some embodiments, the switch control module includes a direct switch module and a bypass switch module, the direct switch module is connected in series with the battery, and the bypass switch module is connected in parallel to the branch formed by the direct switch module and the battery, Each of the switch control modules independently controls each of the batteries connected in series to the battery series main circuit or withdrawn from the battery series main circuit.
在一些实施例中，所述直路开关模块和所述旁路开关模块根据电池串联结构和充放电需求，由若干个电子开关管组合得到，所述直路开关模块和所述旁路开关模块互锁控制，以实现防止电池放反、电池在线退出的功能。In some embodiments, the direct switch module and the bypass switch module are obtained by combining several electronic switch tubes according to the battery series structure and charging and discharging requirements, and the direct switch module and the bypass switch module are interlocked Control to realize the function of preventing the battery from being reversed and the battery from being withdrawn online.
在一些实施例中，所述直路开关模块和所述旁路开关模块包括电气控制开关，所述电气控制开关并联有二极管。In some embodiments, the direct switch module and the bypass switch module include electrical control switches, and diodes are connected in parallel to the electrical control switches.
在一些实施例中，所述补电电源为具备整流和逆变能力的双向直流电源，所述检测***包括至少一个所述补电电源，以提高所述双向功率模块的直流侧电压。In some embodiments, the supplementary power supply is a bidirectional DC power supply capable of rectification and inversion, and the detection system includes at least one supplementary power supply to increase the DC side voltage of the bidirectional power module.
在一些实施例中，所述控制***还包括采集模块，所述采集模块包括用于检测电池电压的电压检测模块、用于检测电池电流的电流检测模块和用于检测电池温度的温度检测模块，所述控制***还用于接收所述监控中心下发的所述执行指令和向所述监控中心上传所述电池数据，所述电池数据包括电池电压、电池电流和电池温度。In some embodiments, the control system further includes an acquisition module, the acquisition module includes a voltage detection module for detecting battery voltage, a current detection module for detecting battery current, and a temperature detection module for detecting battery temperature, The control system is also used for receiving the execution instruction issued by the monitoring center and uploading the battery data to the monitoring center, the battery data including battery voltage, battery current and battery temperature.
在一些实施例中，所述压床用于根据所述监控中心下发的所述执行指令控制所述探针或所述夹具与所述电池接触或分离。In some embodiments, the press is used to control the probe or the clamp to contact or separate from the battery according to the execution instruction issued by the monitoring center.
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
附图说明Description of drawings
附图用来提供对本发明技术方案的进一步理解，并且构成说明书的一部分，与本发明的示例一起用于解释本发明的技术方案，并不构成对本发明技术方案的限制。The accompanying drawings are used to provide a further understanding of the technical solution of the present invention, and constitute a part of the description, and are used to explain the technical solution of the present invention together with the examples of the present invention, and do not constitute a limitation to the technical solution of the present invention.
图1是本发明一个实施例提供的检测***的结构连接示意图；Fig. 1 is a schematic diagram of the structural connection of a detection system provided by an embodiment of the present invention;
图2是本发明一个实施例提供的直路开关和旁路开关与电池连接的电路示意图；Fig. 2 is a schematic circuit diagram of a direct switch and a bypass switch connected to a battery provided by an embodiment of the present invention;
图3-5是本发明一个实施例提供的开关模块的三种电路图；3-5 are three circuit diagrams of a switch module provided by an embodiment of the present invention;
图6-9是本发明一个实施例提供的双向功率模块的模块连接示意图；6-9 are schematic diagrams of module connection of a bidirectional power module provided by an embodiment of the present invention;
图10-12是本发明一个实施例提供的双向功率模块和库位配置关系的连接示意图。Figures 10-12 are schematic diagrams of the connection between the two-way power module and the location configuration relationship provided by an embodiment of the present invention.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明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用于解释本发明，并不用于限定本发明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了有利于本发明的说明，其本身没有特有的意义。因此，“模块”、“部件”或“单元”可以混合地使用。In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only to facilitate description of the present invention and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.
需要说明的是，说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。It should be noted that the terms "first" and "second" in the specification, claims and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence.
目前锂动力电池(锂二次电池)的化成分容设备通常采用电池并联的形式进行化成或分容工艺，每个通道对应一个电池进行充放电，那么对N个电池进行化成分容时就要N条从电源到电池的功率线，导致了功率回路多、器件和线路损耗较大、设备成本高等问题。如果采用电池串联的形式进行化成或分容，则只需要采用一条串联线路和一个电源，就能保持串联线路上的电流一致，有利于提升电池的性能，节约了电缆并减少了电缆上的线路损耗。At present, the formation and capacity separation equipment of lithium power batteries (lithium secondary batteries) usually adopts the formation or capacity separation process in the form of batteries connected in parallel, and each channel corresponds to a battery for charging and discharging. N power lines from the power supply to the battery lead to problems such as multiple power loops, large device and line losses, and high equipment costs. If the batteries are connected in series for formation or capacity division, only one series circuit and one power supply are needed to keep the current on the series circuit consistent, which is beneficial to improve the performance of the battery, save cables and reduce the lines on the cables loss.
基于此，本发明实施例提供了一种锂动力电池化成分容的串联检测***，基于电池串联化成分容的形式，构建一套化成分容的全流程检测***，并且针对不同数量电池的电流需求不同的情况，采用AC-DC模块和DC-DC模块组合为电池提供相匹配的电流，满足不同的化成分容场景需求。Based on this, the embodiment of the present invention provides a series detection system for lithium power battery composition and capacity. Based on the form of battery series composition and capacity, a set of full-process detection system for composition and capacity is constructed, and the current of different numbers of batteries In the case of different requirements, the combination of AC-DC module and DC-DC module is used to provide matching current for the battery to meet the requirements of different chemical capacity scenarios.
下面结合附图，对本发明实施例作进一步阐述。The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
参照图1，本发明实施例提供了一种检测***，包括：Referring to Fig. 1, an embodiment of the present invention provides a detection system, including:
双向功率模块，所述双向功率模块包括至少一个AC-DC模块和至少一个DC-DC模块，所述双向功率模块通过所述AC-DC模块与所述DC-DC模块的不同组合方式提供不同功率，与不同数量电池组成串联电路，实现电池充放电；A bidirectional power module, the bidirectional power module includes at least one AC-DC module and at least one DC-DC module, and the bidirectional power module provides different power through different combinations of the AC-DC module and the DC-DC module , form a series circuit with different numbers of batteries to realize battery charging and discharging;
电池串联主电路，连接所述双向功率模块和补电电源，所述电池串联主电路包括串联连接的若干个开关控制模块和若干个电池，每个所述开关控制模块用于控制单个所述电池的连接或在线退出；The battery series main circuit is connected to the bidirectional power module and the supplementary power supply. The battery series main circuit includes several switch control modules and several batteries connected in series, each of the switch control modules is used to control a single battery connection or log out online;
补电电源，与所述电池串联主电路串联连接，用于提高所述电池串联主电路的电压，实现在所述电池串联主电路仅剩一个所述电池的情况下继续充放电，直至满足化成或分容工艺的截止电压；The supplementary power supply is connected in series with the battery series main circuit, and is used to increase the voltage of the battery series main circuit, so as to continue charging and discharging when there is only one battery left in the battery series main circuit, until the formation is satisfied. Or the cut-off voltage of the sub-capacity process;
压床，包括探针或夹具，所述探针或所述夹具通过线缆与所述开关控制模块连接，所述压床还包括压合机构，所述压合机构通过电气控制实现电池的正负极与所述探针或所述夹具接触，以使所述电池接入到所述开关控制模块；A press, including a probe or a fixture, the probe or the fixture is connected to the switch control module through a cable, and the press also includes a pressing mechanism, and the pressing mechanism realizes the normalization of the battery through electrical control. The negative electrode is in contact with the probe or the clamp, so that the battery is connected to the switch control module;
控制***，是信息采集、控制、交互的枢纽，所述控制***在执行化成分容工艺流程的过程中，控制所述压合机构将所述电池与所述探针或所述夹具连接、通过所述开关控制模块将所述电池串联接入所述电池串联主电路、控制所述双向功率模块对所述电池串联主电路上的电池进行充放电，并实时采集电池数据，控制电池在线退出和/或执行化成分容工艺流程的安全管控操作；The control system is the hub of information collection, control, and interaction. The control system controls the press-fitting mechanism to connect the battery with the probe or the fixture during the process of chemical composition and containment process, and through The switch control module connects the battery in series to the battery series main circuit, controls the bidirectional power module to charge and discharge the battery on the battery series main circuit, collects battery data in real time, and controls the battery to exit online and /or perform security control operations for chemical composition and volumetric processes;
监控中心，用于下发化成分容工艺流程的执行指令、根据所述电池数据监控分容工艺流程的运行状况以及存储、统计、分析所述电池数据。The monitoring center is used to issue execution instructions of the capacity-forming process flow, monitor the operation status of the capacity-dividing process flow according to the battery data, and store, count and analyze the battery data.
为了实现电池串联化成或分容，检测***的化成分容库位中设置电池串联主电路，电池串联主电路通过若干个开关控制模块串联形成，每个开关控制模块都可以连接单个电池以对该电池进行充放电，从而通过串联的开关控制模块实现电池的串联连接。由于串联电路的特性，串联中某一点断开会导致整个串联电路断开，因此，本发明实施例的电池串联化成分容检测***具备电池在线退出的功能。具体来说，对于每个开关控制模块，开关控制模块包括直路开关和旁路开关，直路开关与电池串联，旁路开关并联于直路开关与电池组成的支路，直路开关接通而旁路开关断开时，双向功率模块可以对电池进行充放电，当某一个电池需要退出当前化成或分容工艺时，先关断其中一组直路开关，利用该直路开关上的体二极管或开关并联二极管续流，然后接通旁路开关而最后断开另外一组直路开关，完成电池串联主电路电流从直路到旁路的在线切换过程，即可在保持电池串联主电路连通的情况下，将相应的电池退出化成分容工艺。其中，直路开关和旁路开关采用互锁控制，电流从直路到旁路的在线切换过程中，可以防止电池短路和串联电路开路。In order to realize battery series formation or capacity division, the battery series main circuit is set in the storage space of the detection system. The battery series main circuit is formed by connecting several switch control modules in series. Each switch control module can be connected to a single battery to control the battery. The battery is charged and discharged, so that the series connection of the battery is realized through the series switch control module. Due to the characteristics of the series circuit, the disconnection of a certain point in the series connection will cause the disconnection of the entire series circuit. Therefore, the capacity detection system of the battery series composition in the embodiment of the present invention has the function of battery online withdrawal. Specifically, for each switch control module, the switch control module includes a direct switch and a bypass switch. When disconnected, the bidirectional power module can charge and discharge the battery. When a certain battery needs to exit the current formation or capacity separation process, first turn off one of the direct switches, and use the body diode on the direct switch or the parallel diode of the switch to continue. Then turn on the bypass switch and finally turn off another group of direct circuit switches to complete the online switching process of the battery series main circuit current from the direct circuit to the bypass, that is, while keeping the battery series main circuit connected, the corresponding The battery exits the formation and capacity process. Among them, the direct circuit switch and the bypass switch adopt interlocking control, which can prevent the short circuit of the battery and the open circuit of the series circuit during the online switching process of the current from the direct circuit to the bypass.
对于直路开关和旁路开关的结构，直路开关和旁路开关根据不同电池结构和需求，由电子开关管进行不同组合，并可以摆放在不同位置，可以参见图2的电路连接示意图。下面通过具体例子对直路开关和旁路开关的结构进行说明。For the structure of the direct switch and the bypass switch, the direct switch and the bypass switch are combined by electronic switch tubes according to different battery structures and requirements, and can be placed in different positions. Please refer to the circuit connection schematic diagram in Figure 2. The structures of the straight-through switch and the bypass switch are described below through specific examples.
第一个例子通过以下方式实现：参照图3，直路开关包括第一开关管和第二开关管，旁路开关包括第三开关管，第一开关管、第二开关管和第三开关管均具有体二极管或并联有单向二极管，第一开关管和第二开关管串联，第一开关管和第三开关管一极连接。以第一开关管、第二开关管和第三开关管均为MOSFET为例，第一开关管、第二开关管和第三开关管均具有体二极管，体二极管的方向为从源极到漏极的方向，在电路结构上，第一开关管和第二开关管处于同一支路，第一开关管和第三开关管分别处于一极连接的两个支路。由图2可知，在电池已接入直路开关的情况下，第一开关管和第二开关管导通，第三开关管截止，此时将电池退出，则先关断第二开关管，然后导通第三开关管，使得直路开关被旁路，电流改由第三开关管通过，最后关断第一开关管，即可将电池从电池串联主电路中退出。通过上述方法，对于每个开关控制模块，都可以单独控制实现对电池的在线退出，不会对电池串联主电路中的其他电池造成影响。可以理解的是，上述MOSFET仅为开关管的一种实现方式，上述开关管还可以采用IGBT、并联有二极管的继电器等实现。The first example is realized in the following manner: Referring to FIG. 3 , the direct switch includes a first switch tube and a second switch tube, the bypass switch includes a third switch tube, and the first switch tube, the second switch tube, and the third switch tube are all A body diode or a unidirectional diode is connected in parallel, the first switch tube and the second switch tube are connected in series, and the first switch tube and the third switch tube are connected at one pole. Taking the first switch tube, the second switch tube and the third switch tube as MOSFETs as an example, the first switch tube, the second switch tube and the third switch tube all have body diodes, and the direction of the body diodes is from source to drain In the direction of poles, in terms of circuit structure, the first switching tube and the second switching tube are in the same branch, and the first switching tube and the third switching tube are respectively in two branches connected by one pole. It can be seen from Figure 2 that when the battery has been connected to the direct circuit switch, the first switch tube and the second switch tube are turned on, and the third switch tube is cut off. At this time, when the battery is withdrawn, the second switch tube is turned off first, and then The third switching tube is turned on, so that the direct switch is bypassed, the current passes through the third switching tube, and finally the first switching tube is turned off, so that the battery can be withdrawn from the battery series main circuit. Through the above method, each switch control module can be independently controlled to realize the online withdrawal of the battery without affecting other batteries in the battery series main circuit. It can be understood that the above-mentioned MOSFET is only one implementation manner of the switch tube, and the above-mentioned switch tube can also be implemented by using an IGBT, a relay connected in parallel with a diode, and the like.
第二个例子通过以下方式实现：参照图4，直路开关包括第一开关管和第二开关管，旁路开关包括第三开关管和第四开关管，第一开关管、第二开关管、第三开关管和第四开关管 均具有体二极管或并联有单向二极管，第一开关管和第二开关管串联，第一开关管和第三开关管一极连接。以第一开关管、第二开关管、第三开关管和第四开关管均为MOSFET为例，第一开关管、第二开关管、第三开关管和第四开关管均具有体二极管，体二极管的方向为从源极到漏极的方向，在电路结构上，第一开关管和第二开关管处于同一支路，而第三开关管和第四开关管处于同一支路，第一开关管和第三开关管分别处于一极连接的两个支路。由图3可知，在电池已接入直路开关的情况下，第一开关管和第二开关管导通，第三开关管截止，此时将电池退出，则先关断第二开关管，电流通过第二开关管的体二极管或并联二极管续流，然后导通第三开关管，第四开关管可以导通或保持关断，使得直路开关被旁路，电流改由第三开关管通过，最后关断第一开关管，即可将电池从电池串联主电路中退出。通过上述方法，对于每个开关控制模块，都可以单独控制实现对电池的在线退出。不会对电池串联主电路中的其他电池造成影响。可以理解的是，上述MOSFET仅为开关管的一种实现方式，上述开关管还可以采用IGBT、并联有二极管的继电器等实现。The second example is realized in the following manner: Referring to Fig. 4, the direct switch includes a first switch tube and a second switch tube, the bypass switch includes a third switch tube and a fourth switch tube, the first switch tube, the second switch tube, Both the third switch tube and the fourth switch tube have a body diode or a one-way diode connected in parallel, the first switch tube and the second switch tube are connected in series, and the first switch tube and the third switch tube are connected to one pole. Taking the first switching tube, the second switching tube, the third switching tube and the fourth switching tube as MOSFETs as an example, the first switching tube, the second switching tube, the third switching tube and the fourth switching tube all have body diodes, The direction of the body diode is from the source to the drain. In the circuit structure, the first switch tube and the second switch tube are in the same branch, and the third switch tube and the fourth switch tube are in the same branch. The first switch tube is in the same branch. The switch tube and the third switch tube are respectively in two branches connected with one pole. It can be seen from Figure 3 that when the battery has been connected to the direct circuit switch, the first switch tube and the second switch tube are turned on, and the third switch tube is turned off. The freewheeling current passes through the body diode of the second switch tube or the parallel diode, and then the third switch tube is turned on, and the fourth switch tube can be turned on or kept off, so that the direct switch is bypassed, and the current passes through the third switch tube instead, Finally, the first switching tube is turned off, so that the battery can be withdrawn from the battery series main circuit. Through the above method, each switch control module can be independently controlled to realize the online withdrawal of the battery. It will not affect other batteries in the battery series main circuit. It can be understood that the above-mentioned MOSFET is only one implementation manner of the switch tube, and the above-mentioned switch tube can also be implemented by using an IGBT, a relay connected in parallel with a diode, and the like.
可以理解的是，第一开关管和第二开关管与电池之间的串联位置关系可根据需要调整，例如，参照图5，第一开关管、电池和第二开关管依次串联。本发明实施例不限定第一开关管和第二开关管与电池之间的串联位置关系，也不限定直路开关只能由第一开关管和第二开关管组成，当然也不限定旁路开关只能由第三开关管和第四开关管组成。由于组成方式很多，在此不一一列举，通过电子开关管实现电池在线退出功能均应在本发明的保护范围内。It can be understood that the series position relationship between the first switch tube, the second switch tube and the battery can be adjusted as required. For example, referring to FIG. 5 , the first switch tube, the battery and the second switch tube are connected in series in sequence. The embodiment of the present invention does not limit the series positional relationship between the first switch tube and the second switch tube and the battery, nor does it limit the straight switch to only be composed of the first switch tube and the second switch tube, and of course does not limit the bypass switch It can only be composed of the third switching tube and the fourth switching tube. Since there are many ways of composition, they will not be listed here one by one. Realizing the battery online exit function through the electronic switch should be within the scope of protection of the present invention.
上述开关控制模块的安装组合是多样的，可以根据不同的电池需求和库位的安装空间进行定制设计，既可以单独安装，也可以组合安装，例如，可以将单个开关控制模块安装在PCB板上，也可以单个开关控制模块封装在一个安装盒里，可以多个开关控制模块集中安装在PCB板上，也可以多个开关控制模块封装在一个安装盒里。The installation combinations of the above switch control modules are diverse, and can be customized according to different battery requirements and the installation space of the storage location. They can be installed individually or in combination. For example, a single switch control module can be installed on the PCB board. , a single switch control module can also be packaged in one installation box, multiple switch control modules can be collectively installed on the PCB board, or multiple switch control modules can be packaged in one installation box.
双向功率模块中AC-DC包括两种模式，一种是工频变压器隔离型AC-DC，另一种是高频变压器隔离型AC-DC。AC-DC模块包括第一输入端和第一输出端，DC-DC模块包括第二输入端和第二输出端，第一输入端连接交流源，第一输出端连接第二输入端，第二输出端连接电池串联主电路。值得注意的是，双向功率模块可以通过多种方式实现，下面以几种具体的方式进行举例说明。The AC-DC in the bidirectional power module includes two modes, one is the power frequency transformer isolated AC-DC, and the other is the high frequency transformer isolated AC-DC. The AC-DC module includes a first input end and a first output end, the DC-DC module includes a second input end and a second output end, the first input end is connected to an AC source, the first output end is connected to a second input end, and the second The output terminal is connected to the battery series main circuit. It should be noted that the bidirectional power module can be implemented in various ways, and several specific ways will be described below as examples.
参照图6，双向功率模块包括一个AC-DC模块和一个DC-DC模块，AC-DC模块的第一输入端连接三相交流输入，AC-DC模块的第一输出端为直流输出并连接DC-DC模块的第二输入端，DC-DC模块的第二输出端同样为直流输出并连接电池串联主电路的输入端，为电池串联主电路提供直流源。Referring to Figure 6, the bidirectional power module includes an AC-DC module and a DC-DC module, the first input terminal of the AC-DC module is connected to the three-phase AC input, and the first output terminal of the AC-DC module is a DC output and connected to the DC - the second input terminal of the DC module, the second output terminal of the DC-DC module is also a DC output and connected to the input terminal of the battery series main circuit to provide a DC source for the battery series main circuit.
参照图7，双向功率模块包括多个AC-DC模块和一个DC-DC模块，多个AC-DC模块的第一输入端均连接三相交流输入，多个AC-DC模块的第一输出端均连接到DC-DC模块的第二输入端，该DC-DC模块的第二输出端并接到电池串联主电路的输入端，其中，多个AC-DC模块处于并联连接，AC-DC模块之间采用均流控制。Referring to Figure 7, the bidirectional power module includes a plurality of AC-DC modules and a DC-DC module, the first input ends of the plurality of AC-DC modules are connected to the three-phase AC input, and the first output ends of the plurality of AC-DC modules Both are connected to the second input terminal of the DC-DC module, and the second output terminal of the DC-DC module is connected to the input terminal of the battery series main circuit, wherein a plurality of AC-DC modules are connected in parallel, and the AC-DC module Between the use of current control.
参照图8，双向功率模块包括一个AC-DC模块和多个DC-DC模块，该AC-DC模块的第一输入端连接三相交流输入，该AC-DC模块的第一输出端分离出多条线路连接到多个DC-DC模块的第二输入端，多个DC-DC模块的第二输出端并接到电池串联主电路的输入端，其中，多个DC-DC模块处于并联连接，DC-DC模块之间采用均流控制。Referring to Figure 8, the bidirectional power module includes an AC-DC module and multiple DC-DC modules, the first input terminal of the AC-DC module is connected to the three-phase AC input, and the first output terminal of the AC-DC module separates multiple The first line is connected to the second input end of multiple DC-DC modules, and the second output end of multiple DC-DC modules is connected to the input end of the battery series main circuit in parallel, wherein the multiple DC-DC modules are connected in parallel, Current sharing control is adopted between DC-DC modules.
参照图9，双向功率模块包括多个AC-DC模块和多个DC-DC模块，多个AC-DC模块的第 一输入端均连接三相交流输入，多个AC-DC模块的第一输出端分离出多条线路连接到多个DC-DC模块的第二输入端，多个DC-DC模块的第二输出端并接到电池串联主电路的输入端，其中，多个AC-DC模块处于并联连接，AC-DC模块之间采用均流控制，多个DC-DC模块处于并联连接，DC-DC模块之间采用均流控制。Referring to Fig. 9, the bidirectional power module includes a plurality of AC-DC modules and a plurality of DC-DC modules, the first input ends of the plurality of AC-DC modules are connected to the three-phase AC input, and the first outputs of the plurality of AC-DC modules Multiple lines are separated from the terminal and connected to the second input terminals of multiple DC-DC modules, and the second output terminals of multiple DC-DC modules are connected to the input terminals of the battery series main circuit. Among them, multiple AC-DC modules In parallel connection, current sharing control is adopted between AC-DC modules; when multiple DC-DC modules are in parallel connection, current sharing control is adopted between DC-DC modules.
对于化成分容库位中电池数量的限制，本发明实施例通过AC-DC模块和DC-DC模块不同的组合方式提供相应的功率。其中双向功率模块的输入端连接交流电网(通常接入到380V AC或220V AC)，提供了交流电网取电和将电池的电量回馈到交流电网功能。For the limitation of the number of batteries in the chemical storage location, the embodiments of the present invention provide corresponding power through different combinations of AC-DC modules and DC-DC modules. The input terminal of the bidirectional power module is connected to the AC grid (usually connected to 380V AC or 220V AC), which provides the functions of taking power from the AC grid and feeding back the power of the battery to the AC grid.
可以理解的是，上述补电电源为具备整流和逆变能力的双向直流电源，检测***包括至少一个补电电源(一个或两个以上并联连接)，以提高电池串联主电路的电压，实现电池串联主电路中在仅剩一个电池的情况下仍然能够继续充放电，直至满足化成或分容工艺的截止电压，值得注意的是，补电电源在电池串联主电路中可以设置在不同的位置，例如设置在电池串联主电路的电池和电池之间，设置在电池串联主电路的起始位置或末尾位置等等(下述图10至图12中仅举例补电电源设置在电池串联主电路的起始位置)，在此不作限定。It can be understood that the above-mentioned supplementary power supply is a bidirectional DC power supply with rectification and inverter capabilities, and the detection system includes at least one supplementary power supply (one or more than two connected in parallel) to increase the voltage of the battery series main circuit and realize battery In the series main circuit, when there is only one battery left, it can still continue to charge and discharge until the cut-off voltage of the formation or capacity separation process is met. It is worth noting that the supplementary power supply can be set in different positions in the battery series main circuit. For example, it is set between the battery and the battery of the battery series main circuit, and is set at the starting position or the end position of the battery series main circuit, etc. starting position), which is not limited here.
参照图10，当只有一个化成分容库位，且一个双向功率模块能够为该化成分容库位中的电池提供足够的功率，则可以一个双向功率模块对应一个化成分容库位。Referring to FIG. 10 , when there is only one chemical storage location, and a bidirectional power module can provide sufficient power for the batteries in the chemical storage location, then one bidirectional power module can correspond to one chemical storage location.
参照图11，当化成分容库位有多个，化成分容库位之间通过电池串联电路串接起来，一个双向功率模块内部的ACDC和DCDC组合可以参照上述图6至9中一对一、多对一、一对多和多对多组合方式，如果一个双向功率模块能够为这些化成分容库位中的电池提供足够的功率，则可以一个双向功率模块对应多个化成分容库位。在一些情况下，如果一个双向功率模块不能够为这些化成分容库位中的电池提供足够的功率，则可以采用两个或两个以上的双向功率模块，将这些双向功率模块组合起来(如通过线缆并联)为电池提供足够的功率。Referring to Figure 11, when there are multiple chemical storage locations, the chemical storage locations are connected in series through a battery series circuit, and the ACDC and DCDC combinations inside a bidirectional power module can refer to the one-to-one configuration shown in Figures 6 to 9 above. , many-to-one, one-to-many, and many-to-many combinations, if a bidirectional power module can provide enough power for the batteries in these composition storage locations, then one bidirectional power module can correspond to multiple composition storage locations . In some cases, if one bidirectional power module cannot provide enough power for the batteries in these compartmentalized storage locations, two or more bidirectional power modules can be used to combine these bidirectional power modules (such as connected in parallel via cables) to provide enough power for the battery.
参照图12，当电池数量过多，即使电池均处于同一个库位，如果一个双向功率模块无法为化成分容库位中的这些电池提供足够的功率，那么将在化成分容库位中构建多条电池串联主电路，每一条或者每两条以上电池串联主电路对应一个双向功率模块，此时则构成多个双向功率模块对应一个化成分容库位。Referring to Figure 12, when there are too many batteries, even if the batteries are all in the same storage location, if a bidirectional power module cannot provide enough power for these batteries in the chemical storage location, then it will be built in the chemical storage location Multiple batteries are connected in series to the main circuit, and each or every two or more batteries connected in series corresponds to a bidirectional power module. At this time, a plurality of bidirectional power modules are formed to correspond to a component storage location.
可以理解的是，上述仅为针对不同电池数量采用不同供电方式的举例，结合上述AC-DC模块和DC-DC模块组合的方式，当单个模块不能满足电流输出要求时，可采用两个或多个模块并联，实现均衡、高精度输出大电流，满足数量多或大容量电池充放电电流要求。It can be understood that the above is only an example of using different power supply methods for different numbers of batteries. Combined with the combination of the above-mentioned AC-DC module and DC-DC module, when a single module cannot meet the current output requirements, two or more can be used. The modules are connected in parallel to achieve balanced, high-precision output of large currents, meeting the charging and discharging current requirements of a large number or large-capacity batteries.
对于压床，压床包括气缸、电池托盘和电池探针，通过电气控制气缸动作，通过气缸动作控制电池托盘的位置，以控制电池探针与电池的正负极接触，其中电池探针包括电流探针和电压探针。压床是电池自动化生产的机械传送、压接的工作平台，控制***通过向压床发送控制信号，压床可以根据控制信号控制托盘上升、下降，以及控制电池探针与电池的正负极接触，完成电池串联主电路与电池的物理连接等，压床还包括负压控制、托盘检测、气缸位置检测和烟雾报警等功能，在此不展开一一详述。另外，压床还可以采用夹具式的或者其他形式的机械结构，以满足电池进行化成分容不同的机械操作需求，在此也不一一列举。可以理解的是，上述压床中的电池探针可以替换成电池夹具，电池夹具通过接触电池的正负极进行分成或分容工艺流程，这种情况下，夹具包括电流夹具和电压夹具。For the press, the press includes a cylinder, a battery tray and a battery probe. The cylinder is controlled electrically, and the position of the battery tray is controlled by the cylinder to control the contact between the battery probe and the positive and negative poles of the battery. The battery probe includes a current probes and voltage probes. The press is a working platform for mechanical transmission and crimping of battery automation production. The control system sends control signals to the press, and the press can control the pallet to rise and fall according to the control signal, and control the contact between the battery probe and the positive and negative electrodes of the battery. , to complete the physical connection between the battery series main circuit and the battery, etc. The press also includes functions such as negative pressure control, tray detection, cylinder position detection, and smoke alarm, which will not be described in detail here. In addition, the press can also adopt a jig-type or other mechanical structure to meet the mechanical operation requirements of different chemical composition and capacity of the battery, which will not be listed here. It can be understood that the battery probe in the above-mentioned press can be replaced by a battery clamp, and the battery clamp performs a process of dividing or dividing the battery by contacting the positive and negative electrodes of the battery. In this case, the clamp includes a current clamp and a voltage clamp.
本发明实施例的检测***还包括信息采集模块，信息采集模块包括用于检测电池电压的电压检测模块，电压检测模块与控制***信号连接，控制***通过接收采集模块的电压信号， 能够实时监控电池的运行工况，避免电池出现过压过流。The detection system in the embodiment of the present invention also includes an information collection module, the information collection module includes a voltage detection module for detecting the battery voltage, the voltage detection module is connected to the control system signal, and the control system can monitor the battery in real time by receiving the voltage signal from the collection module operating conditions to avoid overvoltage and overcurrent of the battery.
除了信息采集模块，本发明实施例的检测***还可以包括其他辅助模块，例如温度传感器采集电池的正极温度和负极温度，为检测***提供过温监测。其他辅助模块可以根据监控需要自行设置，在此不一一列举。In addition to the information collection module, the detection system in the embodiment of the present invention may also include other auxiliary modules, such as a temperature sensor that collects the temperature of the positive pole and the negative pole of the battery to provide over-temperature monitoring for the detection system. Other auxiliary modules can be set by themselves according to monitoring needs, and will not be listed here.
基于信息采集模块，本发明实施例的电池串联主电路同样具有电池防反接的功能，当电池以相反方向接入开关控制模块，电压检测模块可以获知电池串联主电路中的电压情况，当超过正常电压范围(如电压正负相反)，控制***即可发出警报或断开当前电池接入的开关控制模块，避免发生电池反接危险。Based on the information collection module, the battery series main circuit of the embodiment of the present invention also has the function of preventing battery reverse connection. When the battery is connected to the switch control module in the opposite direction, the voltage detection module can learn the voltage situation in the battery series main circuit. In the normal voltage range (for example, the positive and negative voltages are reversed), the control system can issue an alarm or disconnect the switch control module currently connected to the battery to avoid the risk of battery reverse connection.
本发明实施例的检测***的具体连接关系可以参照图1，包括多个组件，主要是监控中心、控制***、双向功率模块、电池串联主电路、补电电源、压床(包括电池托盘)，各个部分之间通过内部总线互联，完成命令发送、执行和信息交互等功能。例如，监控中心根据电池化成分容工艺需要进行工艺编辑和下发，包括工步状态、工步时间、电流、上限电压、下限电压、截止电流、截止容量、工步保护参数和负压参数等参数设置，同时，还负责数据显示和数据分析，即显示各串联电池的工步状态、工步时间、电池电压、电流、容量、能量、电流线电压、辅助电压、电池正极温度、电池负极温度等，另外还对串联电池的运行工况进行监视和故障报警显示。而控制***用于***控制和信息采集，与监控中心进行信息交互，同时还与双向功率模块、电池串联主电路、补电电源、压床等进行交互控制和指令发送，例如，控制***根据化成分容的工艺流程，发送开通和关断命令给电池串联主电路，实现直路开关和旁路开关的通断控制，控制***还接收电池串联主电路的所有电池的运行工况数据，对数据进行处理后发送给监控中心。The specific connection relationship of the detection system in the embodiment of the present invention can refer to Figure 1, including multiple components, mainly monitoring center, control system, bidirectional power module, battery series main circuit, supplementary power supply, press (including battery tray), The various parts are interconnected through the internal bus to complete functions such as command sending, execution and information interaction. For example, the monitoring center edits and distributes the process according to the needs of the battery formation and capacity process, including working step status, working step time, current, upper limit voltage, lower limit voltage, cut-off current, cut-off capacity, working step protection parameters and negative pressure parameters, etc. Parameter setting, at the same time, is also responsible for data display and data analysis, that is, displaying the working step status, working step time, battery voltage, current, capacity, energy, current line voltage, auxiliary voltage, battery positive temperature, and battery negative temperature of each series battery In addition, it also monitors the operating conditions of the series batteries and displays fault alarms. The control system is used for system control and information collection, information interaction with the monitoring center, and interactive control and command transmission with the bidirectional power module, battery series main circuit, power supply, press, etc. According to the technical process of component capacity, the on and off commands are sent to the battery series main circuit to realize the on-off control of the direct switch and the bypass switch. The control system also receives the operating condition data of all batteries in the battery series main circuit, and performs data processing. After processing, it is sent to the monitoring center.
上述锂动力电池串联化成分容的检测***，通过化成分容库位中的电池串联主电路实现电池的串联连接，同时控制***可以通过单独的开关控制模块独立控制每个电池在化成分容工艺过程中的在线退出；另一方面，本发明的双向功率模块通过采用AC-DC模块与DC-DC模块的不同组合方式提供不同的功率，从而满足不同数量的电池进行化成分容工艺时不同的电流需求。The detection system for the above-mentioned lithium power battery in series into capacity realizes the series connection of the batteries through the battery series main circuit in the capacity out storage position, and at the same time, the control system can independently control each battery in the capacity out process through a separate switch control module. On-line exit during the process; on the other hand, the bidirectional power module of the present invention provides different power by adopting different combinations of AC-DC modules and DC-DC modules, so as to meet different requirements when different numbers of batteries are used for the formation and capacity process. current demand.
以上是对本申请的较佳实施进行了具体说明，但本申请并不局限于上述实施方式，熟悉本领域的技术人员在不违背本申请精神的前提下还可作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。The above is a specific description of the preferred implementation of the application, but the application is not limited to the above-mentioned implementation, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the application. Equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims (10)

  1. 一种锂动力电池化成分容的串联检测***，其特征在于，包括：A series detection system for the composition and capacity of a lithium power battery, characterized in that it includes:
    双向功率模块，所述双向功率模块包括至少一个AC-DC模块和至少一个DC-DC模块，所述双向功率模块通过所述AC-DC模块与所述DC-DC模块的不同组合方式提供不同功率，与不同数量电池组成串联电路，实现电池充放电；A bidirectional power module, the bidirectional power module includes at least one AC-DC module and at least one DC-DC module, and the bidirectional power module provides different power through different combinations of the AC-DC module and the DC-DC module , form a series circuit with different numbers of batteries to realize battery charging and discharging;
    电池串联主电路，连接所述双向功率模块和补电电源，所述电池串联主电路包括串联连接的若干个开关控制模块和若干个电池，每个所述开关控制模块用于控制单个所述电池的连接或在线退出；The battery series main circuit is connected to the bidirectional power module and the supplementary power supply. The battery series main circuit includes several switch control modules and several batteries connected in series, each of the switch control modules is used to control a single battery connection or log out online;
    补电电源，与所述电池串联主电路串联连接，用于提高所述电池串联主电路的电压，实现在所述电池串联主电路仅剩一个所述电池的情况下继续充放电，直至满足化成或分容工艺的截止电压；The supplementary power supply is connected in series with the battery series main circuit, and is used to increase the voltage of the battery series main circuit, so as to continue charging and discharging when there is only one battery left in the battery series main circuit, until the formation is satisfied. Or the cut-off voltage of the sub-capacity process;
    压床，包括探针或夹具，所述探针或所述夹具通过线缆与所述开关控制模块连接，所述压床还包括压合机构，所述压合机构通过电气控制实现电池的正负极与所述探针或所述夹具接触，以使所述电池接入到所述开关控制模块；A press, including a probe or a fixture, the probe or the fixture is connected to the switch control module through a cable, and the press also includes a pressing mechanism, and the pressing mechanism realizes the normalization of the battery through electrical control. The negative electrode is in contact with the probe or the clamp, so that the battery is connected to the switch control module;
    控制***，是信息采集、控制、交互的枢纽，所述控制***在执行化成分容工艺流程的过程中，控制所述压合机构将所述电池与所述探针或所述夹具连接、通过所述开关控制模块将所述电池串联接入所述电池串联主电路、控制所述双向功率模块对所述电池串联主电路上的电池进行充放电，并实时采集电池数据，控制电池在线退出和/或执行化成分容工艺流程的安全管控操作；The control system is the hub of information collection, control, and interaction. The control system controls the press-fitting mechanism to connect the battery with the probe or the fixture during the process of chemical composition and containment process, and through The switch control module connects the battery in series to the battery series main circuit, controls the bidirectional power module to charge and discharge the battery on the battery series main circuit, collects battery data in real time, and controls the battery to exit online and /or perform security control operations for chemical composition and volumetric processes;
    监控中心，用于下发化成分容工艺流程的执行指令、根据所述电池数据监控分容工艺流程的运行状况以及存储、统计、分析所述电池数据。The monitoring center is used to issue execution instructions of the capacity-forming process flow, monitor the operation status of the capacity-dividing process flow according to the battery data, and store, count and analyze the battery data.
  2. 根据权利要求1所述的检测***，其特征在于，所述AC-DC模块包括第一输入端和第一输出端，所述DC-DC模块包括第二输入端和第二输出端，所述第一输入端连接交流电网，所述第一输出端连接所述第二输入端，所述第二输出端连接所述电池串联主电路。The detection system according to claim 1, wherein the AC-DC module includes a first input end and a first output end, the DC-DC module includes a second input end and a second output end, and the The first input end is connected to the AC grid, the first output end is connected to the second input end, and the second output end is connected to the battery series main circuit.
  3. 根据权利要求1所述的检测***，其特征在于，所述AC-DC包括两种模式，一种是工频变压器隔离型AC-DC，另一种是高频变压器隔离型AC-DC，所述AC-DC模块为两个以上，所述AC-DC模块之间并联连接，所述控制***对所述AC-DC模块之间采用均流控制，所述DC-DC模块为两个以上，所述DC-DC模块之间并联连接，所述控制***对所述DC-DC模块之间采用均流控制。The detection system according to claim 1, wherein the AC-DC includes two modes, one is a power frequency transformer-isolated AC-DC, and the other is a high-frequency transformer-isolated AC-DC. The AC-DC modules are more than two, the AC-DC modules are connected in parallel, the control system adopts current sharing control between the AC-DC modules, and the DC-DC modules are more than two, The DC-DC modules are connected in parallel, and the control system adopts current sharing control between the DC-DC modules.
  4. 根据权利要求1所述的检测***，其特征在于，所述探针包括电流探针和电压探针，所述夹具包括电流夹具和电压夹具，所述压床***用于将电池托盘上的电池的正负极分别与所述电流探针或所述电流夹具、所述电压探针或所述电压夹具通过压合后接触。The detection system according to claim 1, wherein the probes include a current probe and a voltage probe, the clamps include a current clamp and a voltage clamp, and the press system is used to place the battery on the battery tray The positive and negative poles of each contact with the current probe or the current fixture, the voltage probe or the voltage fixture respectively through press-fitting.
  5. 根据权利要求1所述的检测***，其特征在于，所述开关控制模块包括直路开关模块和旁路开关模块，所述直路开关模块与电池串联，所述旁路开关模块并联于所述直路开关模块与电池组成的支路，每个所述开关控制模块独立控制每个所述电池串联接入所述电池串联主电路或者退出所述电池串联主电路。The detection system according to claim 1, wherein the switch control module includes a direct switch module and a bypass switch module, the direct switch module is connected in series with the battery, and the bypass switch module is connected in parallel with the direct switch A branch circuit composed of modules and batteries, each of the switch control modules independently controls each of the batteries connected in series to the battery series main circuit or withdrawn from the battery series main circuit.
  6. 根据权利要求5所述的检测***，其特征在于，所述直路开关模块和所述旁路开关模块根据电池串联结构和充放电需求，由若干个电子开关管组合得到，所述直路开关模块和所 述旁路开关模块互锁控制，以实现防止电池放反、电池在线退出的功能。The detection system according to claim 5, wherein the direct switch module and the bypass switch module are obtained by combining several electronic switch tubes according to the battery series structure and charging and discharging requirements, and the direct switch module and The bypass switch module is interlocked and controlled to realize the functions of preventing the battery from being reversely placed and the battery being withdrawn online.
  7. 根据权利要求5所述的检测***，其特征在于，所述直路开关模块和所述旁路开关模块包括电气控制开关，所述电气控制开关并联有二极管。The detection system according to claim 5, wherein the direct circuit switch module and the bypass switch module include electrical control switches, and diodes are connected in parallel to the electrical control switches.
  8. 根据权利要求1所述的检测***，其特征在于，所述补电电源为具备整流和逆变能力的双向直流电源，所述检测***包括至少一个所述补电电源，以提高所述双向功率模块的直流侧电压。The detection system according to claim 1, wherein the supplementary power supply is a bidirectional DC power supply with rectification and inverter capabilities, and the detection system includes at least one supplementary power supply to improve the bidirectional power The DC side voltage of the module.
  9. 根据权利要求1所述的检测***，其特征在于，所述控制***还包括采集模块，所述采集模块包括用于检测电池电压的电压检测模块、用于检测电池电流的电流检测模块和用于检测电池温度的温度检测模块，所述控制***还用于接收所述监控中心下发的所述执行指令和向所述监控中心上传所述电池数据，所述电池数据包括电池电压、电池电流和电池温度。The detection system according to claim 1, wherein the control system further includes an acquisition module, the acquisition module includes a voltage detection module for detecting battery voltage, a current detection module for detecting battery current, and a A temperature detection module for detecting the temperature of the battery, the control system is also used to receive the execution instruction issued by the monitoring center and upload the battery data to the monitoring center, the battery data includes battery voltage, battery current and battery temperature.
  10. 根据权利要求1所述的检测***，其特征在于，所述压床用于根据所述监控中心下发的所述执行指令控制所述探针或所述夹具与所述电池接触或分离。The detection system according to claim 1, wherein the press is used to control the contact or separation of the probe or the clamp with the battery according to the execution instruction issued by the monitoring center.
PCT/CN2021/128844 2021-09-09 2021-11-05 Series detection system for formation and capacity grading of lithium power battery WO2023035392A1 (en)

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