CN112104053A - Converter system for retired power battery, control method thereof and storage medium - Google Patents
Converter system for retired power battery, control method thereof and storage medium Download PDFInfo
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- CN112104053A CN112104053A CN202011013089.7A CN202011013089A CN112104053A CN 112104053 A CN112104053 A CN 112104053A CN 202011013089 A CN202011013089 A CN 202011013089A CN 112104053 A CN112104053 A CN 112104053A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/106—Parallel operation of dc sources for load balancing, symmetrisation, or sharing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a conversion system for retired power batteries, a control method thereof and a storage medium, wherein the conversion system comprises a direct current converter, a converter and a control module, one end of the direct current converter is used for being connected with the retired power batteries, one end of the converter is connected to a power supply and distribution system, the other end of the converter is connected with the other end of the direct current converter, the control module acquires state parameters of the retired power batteries, and controls working parameters of the converter and the direct current converter according to the state parameters. The converter system can be connected to a power supply and distribution system and different retired power batteries, so that an electric power energy storage system is formed; through an improved converter system topological structure, each converter system can be independently discharged or charged, retired power batteries of different models or different state parameters can be prevented from mutual interference, and high stability is achieved. The invention is widely applied to the technical field of retired power battery utilization.
Description
Technical Field
The invention relates to the technical field of retired power battery utilization, in particular to a current transformation system for a retired power battery, a control method of the current transformation system and a storage medium of the current transformation system.
Background
The retired power battery refers to a power battery which meets the retired standard but has a residual capacity value, and comprises a battery disassembled from an electric automobile. In the prior art, the retired power battery can be used as an electric power energy storage system, and the retired power battery is connected with a power supply and distribution system by using a converter system, so that the retired power battery can store electric power from the power supply and distribution system or transmit the electric power to the power supply and distribution system, the value of the retired power battery is fully utilized, and the environment protection is facilitated. However, since the retired power batteries come from electric vehicles of different models, and the technical standards of each retired power battery are different, even if the retired power batteries of the same model are different in use condition, parameters such as working voltage, internal resistance and residual capacity are different, and therefore when a plurality of retired power batteries form a battery pack, the problem of unbalanced operation of each retired power battery is likely to occur. In the prior art, due to the unreasonable structure of the converter system, the problem of unbalance cannot be effectively solved, and even the situation that a circuit is burnt out due to the fact that a loop current of hundreds of amperes appears in a retired power battery can occur.
Disclosure of Invention
In view of at least one of the above technical problems, the present invention provides a converter system for decommissioning a power battery, a control method thereof, and a storage medium.
On one hand, the embodiment of the invention comprises a converter system for a retired power battery, wherein the converter system comprises a control module and a plurality of converter modules; the converter module comprises a converter and a plurality of direct current converters;
one end of the direct current converter is used for connecting the retired power battery;
one end of the converter is used for being connected to a power supply and distribution system, and the other end of the converter is connected with the other end of each direct current converter;
the control module is used for acquiring state parameters of the retired power battery and controlling working parameters of the converter and each direct current converter according to the state parameters;
the converter modules are connected in parallel.
Further, the controlling the operating parameters of the converter and each of the dc converters according to the state parameters includes:
determining the working state to be a charging state or a discharging state;
determining the conversion directions of the converter and each direct current converter according to the working state;
the working voltage of the retired power battery is obtained, and the working parameters of the direct current converters are determined according to the working voltage, so that in the charging state, the direct current converters convert the voltage of a power supply and distribution system into the working voltage, or in the discharging state, the direct current converters convert the working voltage into the voltage of the power supply and distribution system.
Further, the variable flow system further comprises:
a human-computer interaction module; the human-computer interaction module is used for inputting the state parameters of the retired power battery and sending the state parameters of the retired power battery to the control module.
Further, the variable flow system further comprises:
a plurality of temperature sensitive switches; the temperature sensing switch is used for being connected between the direct current converter and the retired power battery; and the temperature sensing switch is used for switching off when the measured working temperature of the retired power battery is greater than a temperature threshold value.
Further, the variable flow system further comprises:
a plurality of thermistor devices; the thermistor device is used for being connected between the direct current converter and the retired power battery; the thermistor device is used for carrying out resistance change along with the working temperature of the retired power battery.
Further, the thermistor device comprises a positive temperature coefficient thermistor and a negative temperature coefficient thermistor, and the positive temperature coefficient thermistor and the negative temperature coefficient thermistor are connected in parallel or in series.
Further, the positive temperature coefficient thermistor has a first temperature coefficient, the negative temperature coefficient thermistor has a second temperature coefficient, and the absolute value of the first temperature coefficient is several times or one-half of the absolute value of the second temperature coefficient.
Furthermore, the control module is further configured to record a work load and a work duration of the retired power battery, and update a state parameter of the retired power battery according to the work load and the work duration.
On the other hand, the embodiment of the present invention further includes a control method, which is used for controlling the converter system in the embodiment, and the control method includes the following steps:
acquiring state parameters of the retired power battery; the state parameter comprises an operating voltage;
determining the working state to be a charging state or a discharging state;
determining the conversion directions of the converter and each direct current converter according to the working state;
the working voltage of the retired power battery is obtained, and the working parameters of the direct current converters are determined according to the working voltage, so that in the charging state, the direct current converters convert the voltage of a power supply and distribution system into the working voltage, or in the discharging state, the direct current converters convert the working voltage into the voltage of the power supply and distribution system.
In another aspect, the present invention further includes a storage medium, in which a program executable by a processor is stored, and the program executable by the processor is used for executing the method of the embodiment when being executed by the processor.
The invention has the beneficial effects that: the converter system in the embodiment can be connected to a power supply and distribution system and different retired power batteries, so that an electric power energy storage system is formed; through an improved topological structure of the converter system, each of the converter systems can be independently discharged or charged, so that retired power batteries of different types or different state parameters can be prevented from mutual interference, when a certain retired power battery fails, the connection between the retired power battery and the converter system can be timely disconnected, and other normal retired power batteries can still maintain work, so that the converter system has higher stability and improves the convenience of operation and maintenance; the loads of the retired power battery connected to the converter system are balanced, the service life of the retired power battery is effectively prolonged, the total service life of the battery pack of the retired power battery is enabled to be closer to the service life of a single battery, and the capacity utilization rate of the retired power battery can be improved.
Drawings
FIG. 1, FIG. 3 and FIG. 4 are schematic structural diagrams of a variable flow system in an embodiment, respectively;
FIG. 2 is a schematic diagram of connection of an inverter system with a decommissioned power battery and a power supply and distribution system in an embodiment;
fig. 5 and 6 are schematic structural views of thermistor devices in the embodiments, respectively.
Detailed Description
In this embodiment, as shown in fig. 1, the converter system includes a plurality of converter modules, each of which includes a converter and n dc converters, and the converter and the dc converters are connected to each other. In this embodiment, except for the parameters such as the power of the converters, etc., of each converter module, which are different or not completely different, the circuit structure and the operating principle of each converter module may be the same, so that one of the converter modules may be described in this embodiment. When the converter system is used, the converter system can be connected with the retired power battery and the power supply and distribution system respectively, and the connection structure is shown in fig. 2.
Referring to fig. 2, one end of the dc converter is connected to the retired power battery, i.e. one dc converter is connected to one retired power battery. In fig. 2, there are n retired power cells, and in other usage scenarios, there may be less than n retired power cells, i.e., some dc converters may not be connected to a retired power cell, and other dc converters are connected to a retired power cell respectively. Specifically, the anode and the cathode of the retired power battery are respectively connected with the anode and the cathode of one side of the direct current converter. And the positive electrode and the negative electrode of the other side of each direct current converter are respectively connected with the positive electrode and the negative electrode of the direct current side of the converter. And phase lines, neutral lines and the like on the alternating current side of the converter are connected with a power supply and distribution system.
In this embodiment, the DC converter may be referred to as a DC/DC converter in some scenarios, the DC converter is configured to perform DC-DC conversion, the DC converter has two sides, each of the two sides may input DC power and output DC power from the other side, and the input DC power and the output DC power may have different voltages, so as to increase or decrease the DC voltage.
In this embodiment, the converter may be referred to as a DC/AC converter in some scenarios, and functions to perform DC-AC conversion, and has two sides, one side being a DC side and the other side being an AC side, and outputs AC power from the AC side when DC power is input from the DC side, and outputs DC power from the DC side when AC power is input from the AC side, thereby converting DC power into AC power, or converts AC power into DC power from the other direction.
In this embodiment, the converter may be a single-phase or three-phase converter, that is, the converter may receive or output a single-phase or three-phase ac power. When the converter is a single-phase converter, the alternating current side of the converter comprises a phase line and a neutral line, and when the converter is a three-phase converter, the alternating current side of the converter comprises three phase lines and a neutral line, and the phase lines and the neutral line are connected with a power supply and distribution system.
In this embodiment, the power supply and distribution system may be an external power grid, such as a national power grid or a regional power grid, or an internal power supply and distribution system, such as a distribution box of a factory building. When the power supply and distribution system is a distribution box, the distribution box can also be connected with power supplies such as an external power grid or an internal generator.
In this embodiment, after the converter system, the retired power battery, and the power supply and distribution system are connected as shown in fig. 2, the directions of the dc converter and the converter can be configured. When the dc converters and the converters in fig. 2 have a conduction direction from right to left in fig. 2, and the dc converters perform voltage reduction, the converters receive ac input of the power distribution system, convert the ac into high-voltage dc, and output the high-voltage dc to each dc converter, and the dc converters reduce the high-voltage dc into low-voltage dc for output, so as to charge the connected retired power batteries. When the dc converters and the converters in fig. 2 have a conducting direction from left to right in fig. 2, and the dc converters boost voltages, each retired power battery discharges to output low-voltage dc, the dc converters connected to the retired power batteries boost the low-voltage dc to high-voltage dc to be output to the converters, and the converters convert the dc to ac to be output to the power supply and distribution system, thereby realizing the discharging of the retired power batteries and the power supply to the power supply and distribution system.
In this embodiment, through the structure shown in fig. 1 and the connection manner shown in fig. 2, the converter system can be connected to a power supply and distribution system and different retired power batteries, so as to form an electric power energy storage system; through an improved topological structure of the converter system, each power battery can be independently discharged or charged, the retired power batteries of different types or different state parameters can be prevented from mutual interference, when a certain retired power battery fails, the connection between the retired power battery and the converter system can be timely disconnected, other normal retired power batteries can still maintain working, and therefore high stability is achieved.
In this embodiment, on the basis of the converter and the dc converter, a control module and a human-computer interaction module may be further provided, where the control module may be a single chip microcomputer or a PLC, and the human-computer interaction module may be a touch screen. The man-machine interaction module is connected with the data interface of the control module. After a new retired power battery is connected into the converter system, a worker can input the state parameters of the newly connected retired power battery through the human-computer interaction module, the human-computer interaction module sends the state parameters to the control module, and the control module controls the working parameters of the converter and the direct current converters according to the state parameters.
In this embodiment, the state parameter of the retired power battery includes the operating voltage of the retired power battery. The control module executes the following steps to realize the control of the converter and the direct current converter:
s1, determining that the working state is a charging state or a discharging state;
s2, determining the conversion directions of the converter and each direct current converter according to the working state;
and S3, acquiring the working voltage of the retired power battery, and determining the working parameters of each direct current converter according to the working voltage, so that the direct current converter converts the voltage of the power supply and distribution system into the working voltage in a charging state, or converts the working voltage into the voltage of the power supply and distribution system in a discharging state.
In this embodiment, when the control module executes step S2, the control module outputs control signals to the converter and the dc converter when the operating state is the charging state, so that the dc converter and the converter in fig. 2 have a conversion direction from right to left in fig. 2; when the working state is a discharging state, the control module outputs control signals to the converter and the direct current converter, so that the direct current converter and the converter in the figure 2 have a conversion direction from left to right in the figure 2.
In this embodiment, the dc converter and the inverter realize voltage transformation and current transformation by PWM control. The control module changes the transformation ratio of the direct current converter by controlling the duty ratio of the PWM control signal, so that the direct current converter converts the voltage of the power supply and distribution system into the working voltage of the retired power battery in a charging state, and converts the working voltage into the voltage of the power supply and distribution system in a discharging state. When the control module is provided with a plurality of data interfaces, the duty ratio of the PWM control signal of each direct current converter can be independently controlled, so that different direct current converters can have different transformation ratios, and the state parameters of different retired power batteries are adapted.
In this embodiment, referring to fig. 3, the converter system further includes a plurality of temperature-sensing switches, and specifically, each dc converter is equipped with one temperature-sensing switch, one end of each temperature-sensing switch is connected to one end of the dc converter, and the other end of each temperature-sensing switch is connected to the retired power battery. The temperature sensing switch is in contact with a heating area of a connected retired power battery and is used for detecting the working temperature of the retired power battery, the temperature sensing switch has fusing or similar performance, when the retired power battery is abnormal, and the working temperature of the retired power battery is larger than a temperature threshold value, the temperature sensing switch is disconnected, the connection between the retired power battery and the direct current converter is cut off, and therefore the safety of a current conversion system and a power supply and distribution system is maintained.
In this embodiment, referring to fig. 4, the converter system further includes a plurality of thermistor devices, and specifically, each of the dc converters is provided with a thermistor device. When the temperature sensing switch and the thermistor device are arranged at the same time, one end of the thermistor device is connected with one end of the direct current converter through the temperature sensing switch, and the other end of the thermistor device is connected with the retired power battery, namely, the thermistor device is connected with the temperature sensing switch in series. The thermistor is in contact with a heating area of the connected retired power battery and is used for detecting the working temperature of the retired power battery, and resistance change is carried out along with the working temperature of the retired power battery, so that the connection resistance between the retired power battery and the direct current converter is changed. For example, when the ptc thermistor device is used, if the retired power battery generates heat due to abnormal operation, the connection resistance between the retired power battery and the dc converter becomes large, which has the effect of disconnecting the retired power battery from the dc converter, thereby maintaining the safety of the converter system and the power supply and distribution system.
In this embodiment, the structure of the thermistor device is shown in fig. 5. A thermistor device is composed of a positive temperature coefficient thermistor (PTC) and a negative temperature coefficient thermistor (NTC) connected in parallel, or as shown in fig. 6. A thermistor device is composed of a positive temperature coefficient thermistor and a negative temperature coefficient thermistor connected in series. In this embodiment, the ptc thermistor has a first temperature coefficient, the ptc thermistor has a second temperature coefficient, and the first temperature coefficient and the second temperature coefficient can be found in the product specification of the selected ptc thermistor and ptc thermistor. In some cases, the first temperature coefficient is represented by a positive number, the second temperature coefficient is represented by a negative number, and the positive temperature coefficient thermistor and the negative temperature coefficient thermistor used in the present embodiment satisfy the following conditions: the absolute value of the first temperature coefficient is several times or one-half of the absolute value of the second temperature coefficient, and preferably, the difference between the absolute value of the first temperature coefficient and the absolute value of the second temperature coefficient is at least one order of magnitude, which specifically includes the following cases:
or
In this embodiment, the selection is
That is, the sensitivity of the positive temperature coefficient thermistor to temperature changes is stronger than that of the negative temperature coefficient thermistor, so that the positive temperature coefficient thermistor and the negative temperature coefficient thermistor connected in parallel or in series have the characteristics of the positive temperature coefficient thermistor as a whole.
When the thermistor device shown in fig. 5 is used, both the positive temperature coefficient thermistor and the negative temperature coefficient thermistor are in contact with the heating area of the retired power battery, and the positive temperature coefficient thermistor and the negative temperature coefficient thermistor connected in parallel or in series are integrally characterized by the positive temperature coefficient thermistor. When the working temperature of the retired power battery changes, for example, the working temperature rises to a temperature threshold value, the resistance of the positive temperature coefficient thermistor becomes large, the effect of disconnecting the retired power battery from the direct current converter is achieved, and therefore the safety of the converter system and the power supply and distribution system is maintained. The temperature threshold can be determined by selecting the types of the positive temperature coefficient thermistor and the negative temperature coefficient thermistor, or customizing the special positive temperature coefficient thermistor and the special negative temperature coefficient thermistor, and selecting the proper first temperature coefficient and the proper second temperature coefficient.
In this embodiment, the positive temperature coefficient thermistor and the negative temperature coefficient thermistor are connected in series or in parallel, so that a device which integrally presents the positive temperature coefficient thermistor or the negative temperature coefficient thermistor can be obtained, and the thermistor with lower sensitivity to temperature change feeds back the resistance change generated by the temperature change, and can correct the resistance change generated by the temperature change of the other thermistor, so that the response to the temperature change is avoided from being too severe, and the effect of dynamic fine adjustment can be achieved.
In this embodiment, the control module measures and records the workload of the retired power battery through an internal or external voltage and current measurement module, where the workload may be a discharge current, a discharge voltage, or a discharge power; the control module records the working time of the retired power battery through an internal or external timing module. And the control module determines the state parameters of the retired power battery corresponding to the working load and the working time through querying a data table and the like according to the measured working load and the working time, so as to update the state parameters of the retired power battery, and controls the working parameters of the converter and each direct current converter according to the updated state parameters of the retired power battery. By updating the state parameters of the retired power battery, the refined control of the working parameters of the converter and the direct-current converter can be realized, the state of the retired power battery is better adapted, and the performance of the retired power battery is exerted.
In the present embodiment, a storage medium in which a program executable by a processor for executing the control method in the embodiment is stored, when the program is executed by the processor, achieves the same technical effects as described in the embodiment.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided with this embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
A computer program can be applied to input data to perform the functions described in the present embodiment to convert the input data to generate output data that is stored to a non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (10)
1. A converter system for a retired power battery is characterized by comprising a control module and a plurality of converter modules; the converter module comprises a converter and a plurality of direct current converters;
one end of the direct current converter is used for connecting the retired power battery;
one end of the converter is used for being connected to a power supply and distribution system, and the other end of the converter is connected with the other end of each direct current converter;
the control module is used for acquiring state parameters of the retired power battery and controlling working parameters of the converter and each direct current converter according to the state parameters;
the converter modules are connected in parallel.
2. The variable flow system of claim 1, wherein said controlling operating parameters of said converter and each of said dc converters based on said state parameters comprises:
determining the working state to be a charging state or a discharging state;
determining the conversion directions of the converter and each direct current converter according to the working state;
the working voltage of the retired power battery is obtained, and the working parameters of the direct current converters are determined according to the working voltage, so that in the charging state, the direct current converters convert the voltage of a power supply and distribution system into the working voltage, or in the discharging state, the direct current converters convert the working voltage into the voltage of the power supply and distribution system.
3. The variable flow system according to claim 1, further comprising:
a human-computer interaction module; the human-computer interaction module is used for inputting the state parameters of the retired power battery and sending the state parameters of the retired power battery to the control module.
4. The variable flow system according to claim 1, further comprising:
a plurality of temperature sensitive switches; the temperature sensing switch is used for being connected between the direct current converter and the retired power battery; and the temperature sensing switch is used for switching off when the measured working temperature of the retired power battery is greater than a temperature threshold value.
5. The variable flow system according to claim 4, further comprising:
a plurality of thermistor devices; the thermistor device is used for being connected between the direct current converter and the retired power battery; the thermistor device is used for carrying out resistance change along with the working temperature of the retired power battery.
6. The variable current system according to claim 5, wherein the thermistor device comprises a positive temperature coefficient thermistor and a negative temperature coefficient thermistor, the positive temperature coefficient thermistor and the negative temperature coefficient thermistor being connected in parallel or in series.
7. The variable current system according to claim 6, wherein the positive temperature coefficient thermistor has a first temperature coefficient and the negative temperature coefficient thermistor has a second temperature coefficient, and the absolute value of the first temperature coefficient is several times or a fraction of the absolute value of the second temperature coefficient.
8. The converter system according to any of claims 1 to 7, wherein the control module is further configured to record a workload and an operating duration of the decommissioned power battery, and update the state parameter of the decommissioned power battery according to the workload and the operating duration.
9. A control method for controlling the variable flow system of any of claims 1-8, comprising:
acquiring state parameters of the retired power battery; the state parameter comprises an operating voltage;
determining the working state to be a charging state or a discharging state;
determining the conversion directions of the converter and each direct current converter according to the working state;
the working voltage of the retired power battery is obtained, and the working parameters of the direct current converters are determined according to the working voltage, so that in the charging state, the direct current converters convert the voltage of a power supply and distribution system into the working voltage, or in the discharging state, the direct current converters convert the working voltage into the voltage of the power supply and distribution system.
10. A storage medium having stored thereon a program executable by a processor, wherein the program executable by the processor is adapted to perform the method of claim 9 when executed by the processor.
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| CN202011013089.7A CN112104053A (en) | 2020-09-24 | 2020-09-24 | Converter system for retired power battery, control method thereof and storage medium |
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| CN202011013089.7A CN112104053A (en) | 2020-09-24 | 2020-09-24 | Converter system for retired power battery, control method thereof and storage medium |
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