CN114421580A - Control device and control method for realizing butt joint of power battery and energy storage system - Google Patents
Control device and control method for realizing butt joint of power battery and energy storage system Download PDFInfo
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- CN114421580A CN114421580A CN202210321056.1A CN202210321056A CN114421580A CN 114421580 A CN114421580 A CN 114421580A CN 202210321056 A CN202210321056 A CN 202210321056A CN 114421580 A CN114421580 A CN 114421580A
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- power battery
- energy storage
- storage system
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention discloses a control device and a control method for realizing butt joint of a power battery and an energy storage system, wherein the control device for realizing butt joint of the power battery and the energy storage system comprises the following steps: the control module is connected with the confirmation circuit; the control module is respectively electrically connected with the energy storage system and the power battery, the acquisition end connected with the confirmation circuit is electrically connected with the control module, the output end connected with the confirmation circuit is electrically connected with the grounding end of the power battery, and the grounding end connected with the confirmation circuit is electrically connected with the grounding end of the power battery. The control device for realizing the butt joint of the power battery and the energy storage system can detect whether the control module is connected with the power battery or not through the connection confirmation circuit, can realize protocol conversion between the energy storage system and the power battery through the control module, so that the energy storage system and the power battery can identify information sent by the other side to carry out effective communication, and can realize the butt joint of the power battery and the energy storage system under the conditions of no need of additional non-standard development and complex disassembly and recombination of the power battery.
Description
Technical Field
The embodiment of the invention relates to the technical field of batteries, in particular to a control device and a control method for realizing butt joint of a power battery and an energy storage system.
Background
In order to realize the double-carbon target, the automobile electromotion of clean trips is more and more popular. The power battery of an automobile can gradually generate performance attenuation and other conditions along with use, the whole life cycle of the power battery is mainly divided into two stages, the power battery is used as an electric automobile power energy storage unit when the performance attenuation is 70% -80% of an initial State of Charge (SOC) to a certain degree from the beginning, the power battery after the SOC value is attenuated to 70% -80% is used as other energy storage units until the power battery is finally scrapped and disassembled, and the stage is generally called as a battery gradient utilization stage.
The existing power battery echelon utilization of electric automobile retirement generally adopts the mode of disassembly, re-screening and recombination, or software change is carried out on a battery control module of a battery pack or an inverter of an energy storage system is changed so that the power battery as the energy storage system is butted with the inverter, but the mode has large workload and is not good economically.
Disclosure of Invention
The invention provides a control device and a control method for realizing butt joint of a power battery and an energy storage system, which can realize butt joint of the power battery and the energy storage system without adding additional non-standard development and complicated disassembly and recombination of the power battery.
According to an aspect of the present invention, there is provided a control device for realizing the docking of a power battery and an energy storage system, including: the control module is connected with the confirmation circuit;
the control module is respectively electrically connected with the energy storage system and the power battery, the acquisition end of the connection confirmation circuit is electrically connected with the control module, the output end of the connection confirmation circuit is electrically connected with the grounding end of the power battery, and the grounding end of the connection confirmation circuit is electrically connected with the grounding end of the power battery;
the control module is used for determining whether the control device is successfully connected with the power battery according to a first voltage signal output by the acquisition end of the connection confirmation circuit;
the control module is used for converting first protocol information sent by the power battery into second protocol information to enable the energy storage system to identify after the control device is successfully connected with the power battery, and is also used for converting the second protocol information sent by the energy storage system into the first protocol information to enable the power battery to identify.
Optionally, the connection confirmation circuit includes a first resistor, a second resistor, a relay, and a first acquisition circuit;
a first end of the first resistor is connected to a first fixed potential, a second end of the first resistor is electrically connected with an input end of the first acquisition circuit, an output end of the first acquisition circuit is used as an acquisition end of the connection confirmation circuit, a second end of the first resistor is electrically connected with a first end of the second resistor, a first end of the second resistor is electrically connected with a first end of the relay, a second end of the relay is used as an output end of the connection confirmation circuit, a control end of the relay is electrically connected with the control module, and a second end of the second resistor is used as a grounding end of the connection confirmation circuit;
the first acquisition circuit is used for generating the first voltage signal according to the connection state of the control device and the power battery.
Optionally, the resistance of the first resistor is equal to the resistance of the second resistor.
Optionally, the control device for realizing the butt joint of the power battery and the energy storage system further comprises an interface module; the interface module comprises a third resistor;
the output end of the connection confirmation circuit is electrically connected with the first end of the third resistor, the grounding end of the connection confirmation circuit is electrically connected with the second end of the third resistor, and the second end of the third resistor is also electrically connected with the grounding end of the power battery.
Optionally, the control device for implementing the butt joint of the power battery and the energy storage system further includes a second detection circuit, the power battery includes a battery pack controller, a third detection circuit and a second acquisition circuit, an output end of the third detection circuit is electrically connected with an input end of the second detection circuit, an output end of the third detection circuit is further electrically connected with an input end of the second acquisition circuit, an output end of the second acquisition circuit is electrically connected with the battery pack controller, and an output end of the second detection circuit is electrically connected with a ground end of the connection confirmation circuit;
the second acquisition circuit is used for generating a second voltage signal according to the connection state of the power battery and the control device;
the battery pack controller is used for determining whether the power battery is successfully connected with the control device according to the second voltage signal.
Optionally, the second detection circuit includes a fourth resistor, the third detection circuit includes a fifth resistor, a first end of the fifth resistor is connected to the second fixed potential signal, a second end of the fifth resistor serves as an output end of the third detection circuit, a first end of the fourth resistor serves as an input end of the second detection circuit, and a second end of the fourth resistor serves as an output end of the second detection circuit.
Optionally, the control module includes a first communication end and a second communication end, the control module is connected with the energy storage system through the first communication end, the control module is connected with the power battery through the second communication end, the control module is used for acquiring first protocol information sent by the power battery through the second communication end, and the control module is further used for acquiring second protocol information sent by the energy storage system according to the first communication end.
According to another aspect of the present invention, there is provided a control method for implementing the docking of a power battery and an energy storage system, which is executed by the control device for implementing the docking of a power battery and an energy storage system according to any one of the first aspect, and the control method includes:
after the control module confirms that the control device is connected with the power battery, performing protocol conversion on first charging information generated when the power battery has a charging requirement, and converting the first charging information into second charging information so as to enable an energy storage system to identify and enable the energy storage system to charge the power battery;
the power battery sends charging data information to the energy storage system in real time through the control module;
when the energy storage system confirms that the power battery is charged to the set electric quantity according to the charging data information, a shutdown instruction is sent to the control module to stop the charging process;
in the charging process or after the charging process is stopped, when the energy storage system receives a discharging instruction, the self state is converted into a discharging state, the control module acquires set data information sent by the power battery to monitor the discharging state, and the set data information is the charging data information or the discharging data information.
Optionally, in the charging process or after the charging process is stopped, when the energy storage system receives a discharge instruction, the energy storage system switches its own state to a discharge state, and the control module acquires the set data information sent by the power battery to perform discharge state monitoring, including:
when the protocol of the power battery is not an extension protocol of a set protocol and the set electric quantity of the power battery is smaller than a first set value, if the energy storage system receives the discharge instruction in the charging process, the energy storage system converts the self state into a discharge state, and the control module acquires charge data information sent by the power battery to monitor the discharge state; if after the charging process stops, the energy storage system receives the discharging instruction, the energy storage system controls the control module to be connected with the power battery so that the power battery enters a charging state, after the power battery enters the charging state, the energy storage system converts the self state into a discharging state, the control module acquires charging data information of the power battery to monitor the discharging state, and the first set value is smaller than the electric quantity value of the fully charged power battery.
Optionally, in the charging process or after the charging process is stopped, when the energy storage system receives a discharge instruction, the energy storage system switches its own state to a discharge state, and the control module acquires the set data information sent by the power battery to perform discharge state monitoring, including:
when the protocol of the power battery is an extension protocol of a set protocol and the set electric quantity of the power battery is equal to a second set value, if the energy storage system receives the discharging instruction in the charging process or after the charging process is stopped, the energy storage system converts the self state into a discharging state, and the discharging instruction is sent to the power battery after being subjected to protocol conversion by the control module so that the power battery can identify the discharging instruction and discharge; and the control module acquires discharge data information sent by the power battery to monitor the discharge state, wherein the second set value is equal to the electric quantity value of the fully charged power battery.
The embodiment of the invention provides a control device and a control method for realizing butt joint of a power battery and an energy storage system, wherein the control device for realizing butt joint of the power battery and the energy storage system comprises the following steps: the control module is connected with the confirmation circuit; the control module is respectively electrically connected with the energy storage system and the power battery, the acquisition end connected with the confirmation circuit is electrically connected with the control module, the output end connected with the confirmation circuit is electrically connected with the grounding end of the power battery, and the grounding end connected with the confirmation circuit is electrically connected with the grounding end of the power battery; the control module is used for determining whether the connection with the power battery is successful according to a first voltage signal output by the acquisition end of the connection confirmation circuit; the control module is used for converting first protocol information sent by the power battery into second protocol information to enable the energy storage system to identify after the control module is successfully connected with the power battery, and is also used for converting the second protocol information sent by the energy storage system into the first protocol information to enable the power battery to identify. The control device for realizing the butt joint of the power battery and the energy storage system can detect whether the control module is connected with the power battery or not through the connection confirmation circuit, can realize protocol conversion between the energy storage system and the power battery through the control module, can enable the energy storage system and the power battery to identify information sent by the other side, can carry out effective communication, can realize the butt joint of the power battery and the energy storage system under the conditions of no need of additional non-standard development and complex disassembly and recombination of the power battery, saves the cost and reduces the complexity of the system.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a control device for implementing the docking of a power battery and an energy storage system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another control device for realizing the interface between a power battery and an energy storage system according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of another control device for interfacing a power battery with an energy storage system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another control device for interfacing a power battery with an energy storage system according to an embodiment of the present invention;
fig. 5 is a flowchart of a control method for interfacing a power battery with an energy storage system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a control device for implementing the docking of a power battery and an energy storage system according to an embodiment of the present invention, and referring to fig. 1, the control device 01 includes: control module 10, connection confirmation circuit 11.
The control module 10 is electrically connected with the energy storage system 02 and the power battery 03 respectively, the acquisition terminal a1 of the connection confirmation circuit 11 is electrically connected with the control module 10, the output terminal U1 of the connection confirmation circuit 11 is electrically connected with the grounding terminal PE1 of the power battery 03, and the grounding terminal PE2 of the connection confirmation circuit 11 is electrically connected with the grounding terminal PE1 of the power battery 03.
The control module 10 is configured to determine whether the control device 01 is successfully connected to the power battery 03 according to the first voltage signal output by the acquisition terminal a1 of the connection confirmation circuit 11.
The control module 10 is configured to, after determining that the control device 01 is successfully connected to the power battery 03, convert the first protocol information sent by the power battery 03 into second protocol information to identify the energy storage system 02, and convert the second protocol information sent by the energy storage system 02 into the first protocol information to identify the power battery 03.
The control module 10 may be a single chip microcomputer, and has functions of operation, control, storage and the like. The energy storage System 02 includes a bidirectional energy storage inverter (Power Conversion System, PCS), and can realize bidirectional Conversion of electric energy, that is, the bidirectional energy storage inverter can output the electric energy of the Power battery 03 to a load for use, and also can transmit the electric energy of the energy storage System 02 to the Power battery 03 through the bidirectional energy storage inverter so as to charge the Power battery 03. The protocol of the power battery 03 is generally 27930 standard protocol, the protocol of the energy storage system 02 is generally modbus protocol, and the first protocol information sent by the power battery 03 may be information such as a charging command, charging data information, discharging data information and the like under 27930 standard protocol. The second protocol information sent by the energy storage system 02 may be information such as a discharge instruction or stop charging under a modbus protocol. The protocols of the power battery 03 and the energy storage system 02 are different, information interaction cannot be directly performed between the two, and protocol conversion needs to be performed through the control module 10 to complete the charging and discharging process after the energy storage system 02 is in butt joint with the power battery 03 and data monitoring of the charging and discharging process.
After the control device 01 is successfully connected with the power battery 03, the energy storage system 02 performs protocol conversion through the control module 10 to realize information interaction with the power battery 03. It is noted that the control module 10 and the connection verification circuit 11 are integrated on the same PCB board. The PCB is connected with the energy storage system 02 and the power battery 03. When the control device 01 is successfully connected with the power battery 03 or the control device 01 is not successfully connected with the power battery 03, the voltages output by the acquisition end a1 of the connection confirmation circuit 11 are different, and the control module 10 can determine the connection state of the control device 01 and the power battery 03 through the acquired first voltage signal of the acquisition end a 1.
The control device for realizing the butt joint of the power battery and the energy storage system can detect whether the control module is connected with the power battery or not through the connection confirmation circuit, can realize protocol conversion between the energy storage system and the power battery through the control module, can enable the energy storage system and the power battery to identify information sent by the other side, can carry out effective communication, can realize the butt joint of the power battery and the energy storage system under the conditions of no need of additional non-standard development and complex disassembly and recombination of the power battery, saves the cost and reduces the complexity of the system.
Continuing to refer to fig. 1, optionally, the control module 10 includes a first communication terminal CAN1 and a second communication terminal CAN2, the control module 10 is connected to the energy storage system 02 through a first communication terminal CAN1, the control module 10 is connected to the power battery 03 through a second communication terminal CAN2, and the control module 10 is configured to obtain first protocol information sent by the power battery 03 through the second communication terminal CAN2 and further configured to obtain second protocol information sent by the energy storage system 02 according to the first communication terminal CAN 1.
The communication between the control module 10 and the energy storage system 02 and the power battery 03 may be a CAN communication, and each communication end of the control module 10 includes a CANH end and a CANL end, and communicates with the energy storage system 02 or the power battery 03 through the CANH end and the CANL end.
Fig. 2 is a schematic structural diagram of another control device for implementing the docking of a power battery and an energy storage system according to an embodiment of the present invention, and referring to fig. 2, optionally, the connection confirmation circuit 11 includes a first resistor R1, a second resistor R2, a relay Q1, and a first acquisition circuit 111;
a first end of the first resistor R1 is connected to a first fixed potential VC1, a second end of the first resistor R1 is electrically connected to an input end a2 of the first acquisition circuit 111, an output end U1 of the first acquisition circuit 111 serves as an acquisition end a1 of the connection confirmation circuit 11, a second end of the first resistor R1 is electrically connected to a first end of the second resistor R2, a first end of the second resistor R2 is electrically connected to a first end of the relay Q1, a second end of the relay Q1 serves as an output end U1 of the connection confirmation circuit 11, a control end of the relay Q1 is electrically connected to the control module 10, and a second end of the second resistor R2 serves as a PE ground 2 of the connection confirmation circuit 11.
The first acquisition circuit 111 is configured to generate a first voltage signal according to a connection state of the control device 01 and the power battery 03.
The first collecting circuit 111 may include at least one of a filter circuit or an amplifier circuit, and is configured to filter or amplify the voltage at the second end of the first resistor R1 and input the filtered or amplified voltage to the input terminal a2, so as to generate a first voltage signal. The first fixed potential VC1 is connected to a fixed voltage, wherein the voltage value of the first fixed potential VC1 can be set according to requirements, and the embodiment is not limited herein.
When the PCB 04 (the PCB 04 corresponds to the control device) integrated with the control module 10 and the connection confirmation circuit 11 is not connected to the power battery 03, the voltage at the input terminal a2 of the first collecting circuit 111 is a fixed voltage of the first fixed potential VC 1. When the connection between the PCB 04 and the power battery 03 is completed and the relay Q1 is not controlled by the control module 10 to be closed, the first fixed potential VC1, the first resistor R1, the second resistor R2, and the ground terminal PE1 of the power battery 03 form a closed loop, and at this time, the voltage at the input terminal a2 of the first acquisition circuit 111 is the voltage divided by the second resistor R2. When the PCB 04 is connected to the power battery 03 and the control module 10 controls the relay Q1 to be closed, the first fixed potential VC1, the first resistor R1, and the ground terminal PE1 of the power battery 03 form a closed loop, and at this time, the voltage of the input terminal a2 of the first acquisition circuit 111 is the voltage of the ground terminal PE1 of the power battery 03. The voltages of the input end a2 of the first collecting circuit 111 are different, so that the generated first voltage signals are different, and the control module 10 can determine the connection state of the control device 01 and the power battery 03 according to the different first voltage signals.
With continued reference to fig. 2, optionally, the resistance of the first resistor R1 is equal to the resistance of the second resistor R2.
When the resistance of the first resistor R1 is equal to the resistance of the second resistor R2, and when the connection between the PCB 04 and the power battery 03 is completed and the control module 10 does not control the relay Q1 to be closed, the first resistor R1 and the second resistor R2 are both fixed voltages of the first fixed potential VC1, and at this time, the voltage at the input end a2 of the first acquisition circuit 111 is half of the fixed voltage of the first fixed potential VC 1.
Fig. 3 is a schematic structural diagram of another control device for implementing the interface between the power battery and the energy storage system according to an embodiment of the present invention, and referring to fig. 3, optionally, the control device 01 further includes an interface module 05, and the interface module 05 includes a third resistor R3.
The output terminal U1 of the connection confirmation circuit 11 is electrically connected to the first terminal of the third resistor R3, the ground terminal PE2 of the connection confirmation circuit 11 is electrically connected to the second terminal of the third resistor R3, and the second terminal of the third resistor R3 is also electrically connected to the ground terminal PE1 of the power battery 03.
The embodiment exemplarily shows that the connection confirmation circuit 11 includes a first resistor R1, a second resistor R2, a relay Q1 and a first acquisition circuit 111, and the resistances of the first resistor R1, the second resistor R2 and the third resistor R3 are all 1000 Ω, and the fluctuation range of the resistances is 970 Ω -1030 Ω, the first fixed potential VC1 is 12V, and the fluctuation range is 11.2V-12.8V.
When the PCB 04 integrated with the control module 10 and the connection confirmation circuit 11 is not connected to the interface module 05, or the interface module 05 is not connected to the power battery 03, the voltage of the input terminal a2 of the first collection circuit 111 is 12V. When the connection between the PCB 04 and the interface module 05 is completed, the connection between the interface module 05 and the power battery 03 is completed, but the control module 10 does not control the closing of the relay Q1, the first fixed potential VC1, the first resistor R1, the second resistor R2, and the ground terminal PE1 of the power battery 03 form a loop, and the voltage of the input terminal a2 of the first acquisition circuit 111 is 6V. When the PCB 04 is connected to the interface module 05, the interface module 05 is connected to the power battery 03, and the control module 10 controls the relay Q1 to be closed, the second resistor R2 and the third resistor R3 are connected in parallel and then connected in series with the first resistor R1, and at this time, the voltage at the input end a2 of the first acquisition circuit 111 is 4V. The first collecting circuit 111 generates different first voltage signals according to different voltage values input by the input end a2 of the first collecting circuit, and the control module 10 confirms the connection state of the control device 01 and the power battery 03 according to the different first voltage signals.
Fig. 4 is a schematic structural diagram of another control device for implementing the butt joint of a power battery and an energy storage system according to an embodiment of the present invention, referring to fig. 4, optionally, the control device 01 further includes a second detection circuit 12, the power battery 03 includes a battery pack controller 031, a third detection circuit 032, and a second acquisition circuit 033, an output end of the third detection circuit 032 is electrically connected to an input end of the second detection circuit 12, an output end of the third detection circuit 032 is also electrically connected to an input end a3 of the second acquisition circuit 033, an output end of the second acquisition circuit 033 is electrically connected to the battery pack controller 031, and an output end of the second detection circuit 12 is electrically connected to a ground end PE2 of the connection confirmation circuit 11;
the second acquisition circuit 033 is configured to generate a second voltage signal according to a connection state of the power battery 03 and the control device 01;
the battery pack controller 031 is used for confirming whether the power battery 03 is successfully connected with the control device 01 according to the second voltage signal.
In the present embodiment, the control device 01 is further exemplarily shown to include an interface module 05. When the power battery 03 is connected with the control device 01 through the interface module 05, the connection is completed and is not completed, voltages of the input ends A3 of the corresponding second acquisition circuits 033 are different, the second acquisition circuits 033 generate different second voltage signals according to the difference of the voltages input by the input ends A3, and the battery pack controller 031 determines whether the power battery 03 is successfully connected with the control device 01 according to the different second voltage signals.
With reference to fig. 4, optionally, the second detection circuit 12 includes a fourth resistor R4, the third detection circuit 032 includes a fifth resistor R5, a first end of the fifth resistor R5 is connected to the second fixed potential signal VC2, a second end of the fifth resistor R5 serves as an output end of the third detection circuit 032, a first end of the fourth resistor R4 serves as an input end of the second detection circuit 12, and a second end of the fourth resistor R4 serves as an output end of the second detection circuit 12.
The second acquisition circuit 033 may include at least one of a filter circuit or an amplification circuit to filter or amplify the voltage at the second terminal of the fifth resistor R5 to generate a second voltage signal. In the embodiment, it is exemplarily shown that the fourth resistor R4 and the fifth resistor R5 have the same resistance, and both have 1000 Ω, and have a fluctuation range of 970 Ω -1000 Ω, and the fixed voltage applied at the second fixed potential VC2 is 12V, and has a fluctuation range of 11.2V-12.8V. When the power battery 03 is not connected to the control device 01, the voltage input from the input terminal a3 of the second collection circuit 033 is 12V. When the power battery 03 is connected with the control device 01, the second fixed potential VC2, the fifth resistor R5, the fourth fixed resistor R4, and the ground terminal PE1 of the power battery 03 form a closed loop, and the voltage input to the input terminal A3 of the second acquisition circuit 033 is 6V. The second collecting circuit 033 generates different second voltage signals according to different voltage values input from the input terminal a3, and the battery pack controller 031 determines whether the connection between the power battery 03 and the control device 01 is completed according to the different second voltage signals.
With continued reference to fig. 4, optionally, the control device 01 further includes a first control switch and a second control switch, the first control switch includes a first coil ZK1 and a first switch K1, the second control switch includes a second coil ZK2 and a second switch K2, one end of the first coil ZK1 is electrically connected to the control module 10, the other end of the first coil ZK1 is connected to the control terminal of the first switch K1, the first switch K1 is further connected between the negative terminal of the auxiliary power supply 06 and the negative terminal of the power battery 03, one end of the second coil ZK2 is electrically connected to the control module 10, the other end of the second coil ZK2 is connected to the control terminal, and the second switch K2 is further connected between the positive terminal of the auxiliary power supply and the positive terminal of the power battery 03. The control module 10 is also configured to control the first coil ZK1 and the second coil ZK2 to be energized to close the first switch and the second switch K2 so that the auxiliary power supply 06 supplies power to the power battery 03.
The embodiment of the present invention further provides a control method for implementing the docking between the power battery and the energy storage system, where the control method is executed by the control device for implementing the docking between the power battery and the energy storage system in any of the above embodiments, fig. 5 is a flowchart of the control method for implementing the docking between the power battery and the energy storage system, and referring to fig. 5, the control method includes:
s101: after the control module confirms that the control device is connected with the power battery, protocol conversion is carried out on first charging information generated when the power battery has a charging requirement, and the first charging information is converted into second charging information, so that the energy storage system can identify and charge the power battery.
The power battery comprises a battery pack controller and a battery pack, and the battery pack controller can acquire the electric quantity of the battery pack in real time. When the electric quantity of the battery pack acquired by the battery pack controller is smaller than a set value, the battery pack is determined to have a charging requirement, first charging information is generated, the protocol of the power battery is different from that of the energy storage system, and therefore the control module needs to convert the first charging information generated by the power battery into second charging information which can be identified by the energy storage system after protocol conversion. And after the energy storage system acquires the second charging information, controlling the self state to be a charging state so as to charge the power battery.
S102: and the power battery sends charging data information to the energy storage system in real time through the control module.
For example, the charging data information may include the power of the power battery, the current of the power battery, and the like. In the charging process of the power battery, the power battery sends charging data information to the energy storage system in real time through the control module.
S103: and when the energy storage system confirms that the power battery is charged to the set electric quantity according to the charging data information, a stopping instruction is sent to the control module to stop the charging process.
The set electric quantity can be set in advance according to the requirements of users, and according to the protocol of the power battery, the set electric quantity can be equal to or smaller than the electric quantity value of the fully charged power battery. And when the energy storage system confirms that the power battery is charged to the set electric quantity, a stop instruction is sent to the control module to stop the charging process.
S104: in the charging process or after the charging process is stopped, when the energy storage system receives a discharging instruction, the self state is converted into a discharging state, the control module acquires set data information sent by the power battery to monitor the discharging state, and the set data information is charging data information or discharging data information.
Optionally, when the protocol of the power battery is not an extension protocol of the set protocol and the set electric quantity of the power battery is smaller than a first set value, if the energy storage system receives a discharge instruction in the charging process, the energy storage system converts the self state into a discharge state, and the control module acquires charge data information sent by the power battery to monitor the discharge state; if the energy storage system receives a discharging instruction after the charging process is stopped, the energy storage system controls the control module to be connected with the power battery so as to enable the power battery to enter a charging state, the energy storage system converts the self state into a discharging state after the power battery enters the charging state, the control module acquires charging data information of the power battery to monitor the discharging state, and the first set value is smaller than the electric quantity value after the power battery is fully charged.
Illustratively, the set protocol is the 27930 standard protocol. When the protocol of the power battery is a non-27930 extended protocol, the power battery cannot identify the discharge command. If the energy storage system receives the discharging instruction in the charging process of the power battery, the energy storage system is directly and forcibly converted into the discharging state after receiving the discharging instruction because the power battery is completely butted with the energy storage system, and the power battery discharges outwards through the energy storage system. Although the power battery cannot identify the discharge instruction, the power battery still acquires the charge data information in the actual discharge process, but the charge data information includes the electric quantity and the current of the power battery, and for example, the electric quantity of the battery is 50% of the electric quantity value after the battery is fully charged, and the current is 1A. Although the control module acquires the charging data information, that is, the data information is set as the charging data information, the control module can still determine the electric quantity value and the current value of the power battery in the current discharging state according to the specific electric quantity value and the specific current value in the charging data information, and can still realize the monitoring of the discharging state. If the energy storage system receives a discharging instruction after the power battery is charged, the power battery and the energy storage system are disconnected at the moment, and the power battery and the energy storage system need to be reconnected when the power battery is discharged. Therefore, the set electric quantity is smaller than the electric quantity value after the power battery is fully charged, for example, the set electric quantity is 97% of the electric quantity value after the power battery is fully charged, the power battery can detect that the power battery has a charging requirement, an instruction can be sent to be in energy storage butt joint with the energy storage system again, after the butt joint is completed, the power battery can be charged, at the moment, the energy storage system can forcibly convert the self state into a discharging state, the power battery discharges outwards through the energy storage system, similarly, although the control module acquires charging data information, the control module can still determine the electric quantity value and the current value of the power battery in the current discharging state according to the specific electric quantity value and the current value in the charging data information, and the monitoring of the discharging state can still be realized.
Or when the protocol of the power battery is an extension protocol of the set protocol and the set electric quantity of the power battery is equal to a second set value, if the energy storage system receives a discharge instruction in the charging process or after the charging process is stopped, the energy storage system converts the self state into a discharge state, and sends the discharge instruction to the power battery after the protocol conversion of the control module so that the power battery identifies the discharge instruction and discharges; and the control module acquires discharge data information sent by the power battery to monitor the discharge state, wherein the second set value is equal to the electric quantity value of the fully charged power battery.
When the protocol of the power battery is 27930 extension protocol, the power battery can recognize the discharge command. In the charging process or after the charging process is stopped, after the energy storage system receives a discharging instruction, on one hand, the self state is converted into a discharging state, on the other hand, the discharging instruction is sent to the power battery after being subjected to protocol conversion through the control module, and at the moment, the data information is set to be discharging data information. The power battery sends discharge data information to the control module in real time, wherein the discharge data information comprises electric quantity, current and the like of the power battery.
The control method for realizing the butt joint of the power battery and the energy storage system provided by the embodiment can realize the process of charging and discharging the power battery through the energy storage system, and solves the problem that the power battery in the market at present does not have the discharge instruction identification.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A control device for realizing butt joint of a power battery and an energy storage system is characterized by comprising: the control module is connected with the confirmation circuit;
the control module is respectively electrically connected with the energy storage system and the power battery, the acquisition end of the connection confirmation circuit is electrically connected with the control module, the output end of the connection confirmation circuit is electrically connected with the grounding end of the power battery, and the grounding end of the connection confirmation circuit is electrically connected with the grounding end of the power battery;
the control module is used for determining whether the control device is successfully connected with the power battery according to a first voltage signal output by the acquisition end of the connection confirmation circuit;
the control module is used for converting first protocol information sent by the power battery into second protocol information to enable the energy storage system to identify after the control device is successfully connected with the power battery, and is also used for converting the second protocol information sent by the energy storage system into the first protocol information to enable the power battery to identify.
2. The control device for realizing the butt joint of the power battery and the energy storage system according to claim 1, wherein the connection confirmation circuit comprises a first resistor, a second resistor, a relay and a first acquisition circuit;
a first end of the first resistor is connected to a first fixed potential, a second end of the first resistor is electrically connected with an input end of the first acquisition circuit, an output end of the first acquisition circuit is used as an acquisition end of the connection confirmation circuit, a second end of the first resistor is electrically connected with a first end of the second resistor, a first end of the second resistor is electrically connected with a first end of the relay, a second end of the relay is used as an output end of the connection confirmation circuit, a control end of the relay is electrically connected with the control module, and a second end of the second resistor is used as a grounding end of the connection confirmation circuit;
the first acquisition circuit is used for generating the first voltage signal according to the connection state of the control device and the power battery.
3. The control device for realizing the butt joint of the power battery and the energy storage system as claimed in claim 2, wherein the resistance value of the first resistor is equal to the resistance value of the second resistor.
4. The control device for realizing the butt joint of the power battery and the energy storage system according to claim 1, further comprising an interface module; the interface module comprises a third resistor;
the output end of the connection confirmation circuit is electrically connected with the first end of the third resistor, the grounding end of the connection confirmation circuit is electrically connected with the second end of the third resistor, and the second end of the third resistor is also electrically connected with the grounding end of the power battery.
5. The control device for realizing the butt joint of the power battery and the energy storage system according to claim 1, further comprising a second detection circuit, wherein the power battery comprises a battery pack controller, a third detection circuit and a second acquisition circuit, an output end of the third detection circuit is electrically connected with an input end of the second detection circuit, an output end of the third detection circuit is further electrically connected with an input end of the second acquisition circuit, an output end of the second acquisition circuit is electrically connected with the battery pack controller, and an output end of the second detection circuit is electrically connected with a ground end of the connection confirmation circuit;
the second acquisition circuit is used for generating a second voltage signal according to the connection state of the power battery and the control device;
the battery pack controller is used for determining whether the power battery is successfully connected with the control device according to the second voltage signal.
6. The control device for realizing the docking of the power battery and the energy storage system according to claim 5, wherein the second detection circuit comprises a fourth resistor, the third detection circuit comprises a fifth resistor, a first end of the fifth resistor is connected to a second fixed potential signal, a second end of the fifth resistor is used as an output end of the third detection circuit, a first end of the fourth resistor is used as an input end of the second detection circuit, and a second end of the fourth resistor is used as an output end of the second detection circuit.
7. The control device for realizing the butt joint of the power battery and the energy storage system according to claim 1, wherein the control module comprises a first communication end and a second communication end, the control module is connected with the energy storage system through the first communication end, the control module is connected with the power battery through the second communication end, and the control module is configured to acquire first protocol information sent by the power battery through the second communication end and is further configured to acquire second protocol information sent by the energy storage system according to the first communication end.
8. A control method for realizing the docking of a power battery and an energy storage system, which is executed by the control device for realizing the docking of a power battery and an energy storage system according to any one of claims 1 to 7, is characterized by comprising the following steps:
after the control module confirms that the control device is connected with the power battery, performing protocol conversion on first charging information generated when the power battery has a charging requirement, and converting the first charging information into second charging information so as to enable an energy storage system to identify and enable the energy storage system to charge the power battery;
the power battery sends charging data information to the energy storage system in real time through the control module;
when the energy storage system confirms that the power battery is charged to the set electric quantity according to the charging data information, a shutdown instruction is sent to the control module to stop the charging process;
in the charging process or after the charging process is stopped, when the energy storage system receives a discharging instruction, the self state is converted into a discharging state, the control module acquires set data information sent by the power battery to monitor the discharging state, and the set data information is the charging data information or the discharging data information.
9. The method according to claim 8, wherein during the charging process or after the charging process is stopped, when the energy storage system receives a discharge command, the energy storage system switches its own state to a discharge state, and the control module obtains the set data information sent by the power battery to perform discharge state monitoring, including:
when the protocol of the power battery is not an extension protocol of a set protocol and the set electric quantity of the power battery is smaller than a first set value, if the energy storage system receives the discharge instruction in the charging process, the energy storage system converts the self state into a discharge state, and the control module acquires charge data information sent by the power battery to monitor the discharge state; if after the charging process stops, the energy storage system receives the discharging instruction, the energy storage system controls the control module to be connected with the power battery so that the power battery enters a charging state, after the power battery enters the charging state, the energy storage system converts the self state into a discharging state, the control module acquires charging data information of the power battery to monitor the discharging state, and the first set value is smaller than the electric quantity value of the fully charged power battery.
10. The method according to claim 8, wherein during the charging process or after the charging process is stopped, when the energy storage system receives a discharge command, the energy storage system switches its own state to a discharge state, and the control module obtains the set data information sent by the power battery to perform discharge state monitoring, including:
when the protocol of the power battery is an extension protocol of a set protocol and the set electric quantity of the power battery is equal to a second set value, if the energy storage system receives the discharging instruction in the charging process or after the charging process is stopped, the energy storage system converts the self state into a discharging state, and the discharging instruction is sent to the power battery after being subjected to protocol conversion by the control module so that the power battery can identify the discharging instruction and discharge; and the control module acquires discharge data information sent by the power battery to monitor the discharge state, wherein the second set value is equal to the electric quantity value of the fully charged power battery.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466918A (en) * | 2014-11-21 | 2015-03-25 | 新疆希望电子有限公司 | Energy storage battery polarity reverse connection protective circuit and recognition method thereof |
| CN204775069U (en) * | 2015-05-27 | 2015-11-18 | 重庆长帆新能源汽车有限公司 | Mains operated system of portable power source car |
| CN204807623U (en) * | 2015-07-16 | 2015-11-25 | 北京长城华冠汽车科技股份有限公司 | Acquisition circuit and contain this acquisition circuit's battery management system |
| CN204858582U (en) * | 2015-08-04 | 2015-12-09 | 上海煦达新能源科技有限公司 | Old and useless power battery unit network centralized control energy storage system of distributing type |
| CN108550930A (en) * | 2018-06-01 | 2018-09-18 | 安徽瑞赛克再生资源技术股份有限公司 | Bridging management device, bridge system and bridging method based on retired power battery pack |
| KR20200048913A (en) * | 2018-10-31 | 2020-05-08 | (주)도원 | Stand-alone household energy storage system based on waste battery |
-
2022
- 2022-03-30 CN CN202210321056.1A patent/CN114421580B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466918A (en) * | 2014-11-21 | 2015-03-25 | 新疆希望电子有限公司 | Energy storage battery polarity reverse connection protective circuit and recognition method thereof |
| CN204775069U (en) * | 2015-05-27 | 2015-11-18 | 重庆长帆新能源汽车有限公司 | Mains operated system of portable power source car |
| CN204807623U (en) * | 2015-07-16 | 2015-11-25 | 北京长城华冠汽车科技股份有限公司 | Acquisition circuit and contain this acquisition circuit's battery management system |
| CN204858582U (en) * | 2015-08-04 | 2015-12-09 | 上海煦达新能源科技有限公司 | Old and useless power battery unit network centralized control energy storage system of distributing type |
| CN108550930A (en) * | 2018-06-01 | 2018-09-18 | 安徽瑞赛克再生资源技术股份有限公司 | Bridging management device, bridge system and bridging method based on retired power battery pack |
| KR20200048913A (en) * | 2018-10-31 | 2020-05-08 | (주)도원 | Stand-alone household energy storage system based on waste battery |
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