A battery charging and discharging equipment accuracy and line sequence calibration tooling system

Abstract

The invention discloses a battery charging and discharging equipment precision and line sequence calibration tooling system, comprising a structural main body, wherein the structural main body comprises a needle bed and a tooling, the structural main body also comprises a battery charging and discharging calibration tooling system, the battery charging and discharging calibration tooling system comprises a host computer PC, a switch, a middle computer, a power cabinet, a calibration tooling, a multimeter, a power supply chassis, and a needle bed, the battery charging and discharging calibration tooling system also comprises a tooling main control board, a tooling switching adjustment logic, a current crimping probe, a tooling crimping copper table, a voltage adapter board, a needle bed control, a current line adapter row, a current line, a sampling switching adjustment logic, and a channel control logic.

Description

Technical Field

[0001] The invention relates to the field of battery charging and discharging, and in particular to a tooling system for calibrating the accuracy and line sequence of battery charging and discharging equipment. Background Art

[0002] With the rapid development of electric vehicles, more and more car companies are joining the new energy vehicle market. At the same time, with the support of policies, new energy vehicles have increased significantly, which has prompted lithium-ion power batteries to enter a period of rapid development. During the production process of batteries, battery charging and discharging equipment is needed to charge and discharge the batteries, so as to realize the battery's chemical composition and activation. At present, in order to ensure that the voltage and current accuracy of battery charging and discharging equipment meet the requirements, it needs to be calibrated regularly;

[0003] In the existing calibration for battery charging and discharging, the channel on the battery charging and discharging device that needs to be calibrated, that is, the channel on the battery charging and discharging device used to connect the battery, is generally directly connected to the calibration tooling, and an external resistor box is used as a load to consume the electrical energy on the calibration channel, so as to obtain the current and voltage of the calibration channel. When the current and voltage on the calibration channel do not meet the requirements, the output voltage is adjusted by the battery charging and discharging device to achieve the correction of the voltage and current on the calibration channel. This method requires an external resistor box, which easily causes the calibration tooling of the battery charging and discharging device to be large in size and waste resources, and increases the calibration cost of the battery charging and discharging device. Therefore, the existing technology needs to be improved and developed. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art solutions, the present invention provides a battery charging and discharging equipment accuracy and line sequence calibration tooling system.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a battery charging and discharging equipment accuracy and line sequence calibration tooling system, including a structural main body, the structural main body includes a needle bed and a tooling, the structural main body also includes a battery charging and discharging calibration tooling system, the battery charging and discharging calibration tooling system includes a host computer PC, a switch, a middle computer, a power cabinet, a calibration tooling, a multimeter, a power supply chassis and a needle bed, the battery charging and discharging calibration tooling system also includes a tooling main control board, a tooling switching adjustment logic, a current crimping probe, a tooling crimping copper table, a voltage transfer board, a needle bed control, a current line transfer row, a current line, a sampling switching adjustment logic and a channel control logic;

[0006] The tooling main control board includes an RS232 communication module, an RS485 communication module and a WAN network communication module. The tooling main control board is connected to the tooling switching adjustment logic to realize the function switching of controlling the entire tooling;

[0007] The upper computer is connected to the intermediate computer for communication, the intermediate computer is connected to the power cabinet for communication via a WAN network communication module, the intermediate computer is connected to the calibration tooling for communication via an RS485 communication module, the intermediate computer is connected to the needle bed for communication via an RS485 communication module, and the tooling main control board is connected to the multimeter via a WAN network communication module;

[0008] The current crimping probe is crimped with the tool crimping copper platform, and the current crimping probe completes the connection between the needle bed and the tool by crimping with the tool crimping copper platform;

[0009] The tooling has multiple positive channels and negative channels, and each channel is equipped with an independent isolated MOS drive switch. The channel control logic is connected to the isolated MOS drive switch control, and the channel control logic transmits signal control by mutual plugging with the tooling main control board;

[0010] The needle bed has multiple current probe modules, each of which is provided with three sampling lines, namely a current line, a voltage sampling line and a main voltage sampling line. The current line is used to connect the positive and negative poles of the probe and the power output part of the power cabinet power chassis, while the voltage sampling line and the main voltage sampling line mainly sample the output voltage of the probe part for voltage mode adjustment data collection of the charging and discharging equipment. The voltage sampling line is used to connect the positive and negative poles of the battery cell, and the purpose of sampling the positive and negative voltage output of the battery equipment can be used for the calibration and adjustment of the battery equipment, as well as the detection of the cable of the battery needle bed equipment. The sampling point of the main voltage sampling line and the voltage sampling line is the same place, which is used to collect the port voltage for uploading data, which is of great help to the calibration of the battery equipment.

[0011] The voltage adapter board is connected to the voltage sampling line and the dual voltage sampling line. The voltage adapter board performs an adapter operation on the voltage sampling line and the dual voltage sampling line on each channel and then directly connects to the power supply chassis.

[0012] Preferably, the host computer PC is connected to a switch, and the intermediate computer is connected to the switch.

[0013] Preferably, the power cabinet is also provided with a pneumatic control, and the intermediate machine is communicatively connected with the pneumatic control.

[0014] Preferably, the current line is connected to a current line adapter bar, and the current line adapter bar is connected to a power supply chassis.

[0015] Preferably, the intermediate machine is connected to the tooling main control board.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A switch is provided between each port and the adjustable power supply. The docking port is used to connect the battery charging and discharging channel on the battery charging and discharging device. The multimeter feeds back the values ​​fed back by the current sampling module and the values ​​collected by the multimeter itself to the intermediate computer; the intermediate computer receives the current value and voltage value uploaded by the multimeter on the tooling equipment, and uploads it to the host computer. The host computer collects the current and voltage on the charging and discharging device, and generates calibration parameters after comparing the current and voltage with the values ​​fed back by the multimeter to feed back the calibration parameters to the battery charging and discharging device. When calibrating the current or voltage, the current and voltage on the current calibration channel on the battery charging and discharging device flow to the uncalibrated channel on the battery charging and discharging device through the docking port, the current sampling module, and the docking port in sequence, or the current and voltage on the uncalibrated channel on the battery charging and discharging device flow to the current calibration channel on the battery charging and discharging device through the docking port, the current sampling module, and the docking port in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a connection schematic diagram of the present invention;

[0020] Figure 3 It is a flow chart of the control logic of the power calibration and line sequence detection tooling system of the present invention;

[0021] Figure 4 It is a flow chart of the line sequence detection logic of the power calibration and line sequence detection tooling system of the present invention;

[0022] Figure 5 It is a flow chart of current calibration of the power supply calibration and line sequence detection tooling system of the present invention;

[0023] Figure 6 The present invention is a flowchart of voltage calibration of the power calibration and line sequence detection tooling system.

[0024] Numbers in the figure:

[0025] Upper computer PC1, middle computer 2, voltage adapter board 3, needle bed 4, current line 5, voltage sampling line 6, main voltage sampling line 7, current crimping probe 8, tooling crimping copper table 9, isolated MOS drive switch 10, tooling switching adjustment logic 12, channel control logic 13, tooling main control board 14, Agilent multimeter 15, power supply chassis 16, power supply cabinet 17. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-6 As shown, the present invention provides a battery charging and discharging equipment accuracy and line sequence calibration tooling system, including a structural body, the structural body includes a needle bed 4 and a tooling, the tooling is mainly used for voltage and current accuracy calibration of battery equipment and line sequence detection of equipment cables, the structural body also includes a battery charging and discharging calibration tooling system, the battery charging and discharging calibration tooling system includes a host computer PC1, a switch, a middle computer 2, a power cabinet 17, a calibration tooling, a multimeter, a power supply chassis 16 and a needle bed 4, the battery charging and discharging calibration tooling system also includes a tooling main control board 14, a tooling switching adjustment logic 12, a current crimping probe 8, a tooling crimping copper table 9, a voltage adapter board 3, a needle bed control, a current line adapter row, a current line 5, a sampling switching adjustment logic and a channel control logic 13;

[0028] The sampling switching adjustment logic designs the adjustment method in the tooling according to the requirements of the adjustment plan, switches the required channels and loops to complete the adjustment and calibration of the battery equipment. The adjustment logic module uses chip MOS for current-type switch control, and the sampling switching part uses an optocoupler switch for switching;

[0029] The channel control logic 13 is used for the output of the channel control signal to control the switch of the isolated MOS driver module. The extended part uses two 74 series chips, one is an 8-bit serial input and parallel output displacement buffer, and the other is an octal output transparent latch, the output is a three-state gate, which is a high-performance silicon gate CMOS device, and an 8-channel Darlington current driver. This chip is used in logic level digital circuits to control the independent output of the channel module to open and close;

[0030] The tooling main control board 14 includes an RS232 communication module, an RS485 communication module and a WAN network communication module. The tooling main control board 14 is connected to the tooling switch adjustment logic 12 to realize the function switching of the entire tooling. The tooling main control board 14 is the main control center of the tooling. The selected chip is a high-density performance ARM 32-bit microcontroller. The tooling main control board 14 also includes a key display module and a sampling switch module;

[0031] The upper computer is connected to the intermediate computer 2 for communication, the intermediate computer 2 is connected to the power cabinet 17 for communication via the WAN network communication module, the intermediate computer 2 is connected to the calibration tooling for communication via the RS485 communication module, the intermediate computer 2 is connected to the needle bed 4 for communication via the RS485 communication module, the tooling main control board 14 is connected to the multimeter via the WAN network communication module, the multimeter is an Agilent multimeter 15, the Agilent multimeter 15 is a six-and-a-half-digital voltmeter for displaying and transmitting the voltage and current data of the charging and discharging battery equipment, the device communicates with the main board via the WAN, and has sampling interfaces in the front and rear directions, as well as various types of data sampling;

[0032] The host computer has a built-in host computer module, which controls the tooling switching channel by issuing instructions. It is the system's general command center, and all instructions are issued by the host computer;

[0033] The intermediate machine 2 has a built-in intermediate machine module, which connects the upper machine and the needle bed 4. The intermediate machine module communicates with the tooling, and the intermediate machine module transmits data through the RS485 communication module.

[0034] The current crimping probe 8 is crimped with the tool crimping copper platform 9, and the current crimping probe 8 completes the connection between the needle bed 4 and the tool by crimping with the tool crimping copper platform 9;

[0035] The tooling has multiple positive channels and negative channels, and each channel is equipped with an independent isolated MOS drive switch 10. The channel control logic 13 is controlled and connected with the isolated MOS drive switch 10. At the same time, the channel control logic 13 transmits signal control by mutual plugging with the tooling main control board 14;

[0036] The needle bed 4 has a plurality of current probe modules, each of which is provided with three sampling lines, namely a current line 5, a voltage sampling line 6 and a main voltage sampling line 7. The current line 5 is used to transmit the output of the power module, while the voltage sampling line 6 and the main voltage sampling line 7 are mainly used to sample the output voltage of the probe part for voltage mode adjustment data collection of the charging and discharging equipment;

[0037] The voltage adapter board 3 is connected to the voltage sampling line 6 and the dual voltage sampling line. The voltage adapter board 3 performs an adapter on the voltage sampling line 6 and the dual voltage sampling line on each channel and then directly connects to the power supply chassis 16. The voltage adapter board 3 is mainly used for the voltage sampling line 6 of the positive and negative poles of the battery cell, the auxiliary voltage sampling line 6, and the current sampling line voltage adapter. Because there are too many battery cell sampling lines, it is inconvenient to directly connect to the power supply cabinet 17 through the crimping pole ear part, so the voltage adapter module is used to reduce the number of cables and facilitate wiring;

[0038] The needle bed control mainly includes the needle bed control part including pneumatic control, power connection and communication connection of the whole equipment;

[0039] The host computer PC1 is connected to the switch, and the intermediate computer 2 is connected to the switch.

[0040] The power cabinet 17 is also provided with a pneumatic control, and the intermediate machine 2 is communicatively connected with the pneumatic control.

[0041] The current line 5 is connected to a current line adapter bar, and the current line adapter bar is connected to a power supply chassis 16 .

[0042] The intermediate machine 2 is connected to the tooling main control board 14 .

[0043] A switch is provided between each port and the adjustable power supply. The docking port is used to connect the battery charging and discharging channel on the battery charging and discharging device. The multimeter feeds back the values ​​fed back by the current sampling module and the values ​​collected by the multimeter itself to the intermediate computer; the intermediate computer receives the current value and voltage value uploaded by the multimeter on the tooling equipment, and uploads it to the host computer. The host computer collects the current and voltage on the charging and discharging device, and generates calibration parameters after comparing the current and voltage with the values ​​fed back by the multimeter to feed back the calibration parameters to the battery charging and discharging device. When calibrating the current or voltage, the current and voltage on the current calibration channel on the battery charging and discharging device flow to the uncalibrated channel on the battery charging and discharging device through the docking port, the current sampling module, and the docking port in sequence, or the current and voltage on the uncalibrated channel on the battery charging and discharging device flow to the current calibration channel on the battery charging and discharging device through the docking port, the current sampling module, and the docking port in sequence.

[0044] The power calibration and line sequence detection tooling system adjustment control logic is as follows:

[0045] Step 1: Start testing;

[0046] Step 2: The host computer sends a channel switching command to control the tooling to switch the corresponding channel and the corresponding mode. The battery charging and discharging system test has four modes in total, including charging voltage mode (CV), charging current mode (CC), discharging current mode (DC), and line sequence detection mode (VC).

[0047] Step 3: The host computer controls the power cabinet to start the corresponding channel and corresponding mode;

[0048] Step 4: Wait for the data to stabilize;

[0049] Step 5: The host computer collects power cabinet data;

[0050] Step 6: The host computer collects multimeter data;

[0051] Step 7: The host computer saves the power cabinet data and multimeter data;

[0052] Step 8: The host computer determines whether all adjustment points have been completed;

[0053] Step 9: The host computer calculates the adjustment code through the power cabinet data and the multimeter data;

[0054] Step 10: The host computer sends the adjustment code to the power cabinet;

[0055] Step 11: End of test;

[0056] The power calibration and line sequence detection tooling system line sequence detection logic is as follows:

[0057] Step 1: Start testing;

[0058] Step 2: The host computer sends a channel switching command to control the tooling to switch the corresponding channel and corresponding mode, line sequence detection mode (VC), and provide voltage;

[0059] Step 3: Wait for 1S;

[0060] Step 4: The host computer samples the main voltage, dual voltage, and power line voltage of the power cabinet and saves the data;

[0061] Step 5: The host computer determines the wiring conditions of the main voltage sampling line, dual voltage sampling line, and current line according to the data of the main voltage, dual voltage, and power line voltage of the power cabinet;

[0062] Step 6: Determine whether the initial voltage sampling is normal;

[0063] Step 7: The log list displays the test results, and PASS is displayed if passed;

[0064] Step 8: Confirm that all channels have been tested. If the test is completed, the process returns to step 2, and the host computer sends a channel switching command to control the tooling to switch the corresponding channel and the corresponding mode, and continue to perform steps 2 to 7;

[0065] Step 9: Display that all channel detection is completed and the line sequence detection process is completed;

[0066] The voltage calibration method of the power calibration and line sequence detection tooling system is as follows:

[0067] Figure 5It represents the voltage calibration method of the tooling system. Each channel has an independent isolated MOS driver module, one side is an independent channel copper platform, and the other side is connected by copper bars. Its function is to cooperate with the adjustment method made by the power cabinet to control the switching of the tooling and create an environment for it. The voltage mode calibration method is to add a load resistor to the positive and negative channels for voltage adjustment. The S6 switch in the figure is the normally closed overcurrent protection board switching switch, and S4 and S5 are the voltage mode adjustment switching switches. The voltage calibration mainly connects the output voltage of the power cabinet to the resistor. The output is stable. The power cabinet collects the voltage on the copper platform. At the same time, the six-and-a-half-digit voltmeter will also collect the voltage output on the copper platform. The calibration data is obtained by calculating the sampling voltage of the six-and-a-half-digit multimeter and the sampling voltage of the power cabinet, and then returned to the power cabinet;

[0068] During the re-inspection, the power supply cabinet provides voltage output in the same way, and the power supply cabinet and the six-and-a-half-digit multimeter take samples at the same time, and compare whether the error between the multimeter sampling value and the power supply cabinet sampling value is within the accuracy range;

[0069] The details are as follows:

[0070] Voltage adjustment: As shown in the figure, switches S4 and S5 are closed and the load resistor is connected;

[0071] Conduct line sequence detection: As shown in the figure, switches S1 and S2 are closed, and the constant voltage output switching power supply V1 is connected in series between the positive and negative electrodes. The channels are cut individually. When a group of channels is cut through, the V1 voltage will be sampled at the crimping point on the same platform.

[0072] The current calibration method of the power supply calibration and line sequence detection tooling system is as follows:

[0073] Figure 6 It represents the current calibration method of the tooling system. Each channel has an independent isolated MOS driver module, one side is an independent channel copper platform, and the other side is connected by copper bars. The function of the module is to cooperate with the adjustment method made by the power cabinet to control the switching of the tooling to create an environment for it. There are two current mode calibration methods. One is the current calibration during charging. The current calibration method is to directly short-circuit the positive and negative channels to adjust the charging current. The other is the discharge current calibration. The current calibration method is to connect a constant voltage output switching power supply V1 between the positive channel and the negative channel. In the figure, the S6 switch is a normally closed overcurrent protection board switching switch, S1 and S2 are discharge current mode adjustment switching switches, and S3 is a charging current mode adjustment switching switch;

[0074] The calibration of current mainly involves short-circuiting the output of the power supply cabinet, and the output is stable. The power supply cabinet collects the current on the copper table, and at the same time, the six-and-a-half-digit voltmeter also collects the current output of the Hall transmission. The calibration data is obtained by calculating the sampling current of the six-and-a-half-digit multimeter and the sampling current of the power supply cabinet, and then returned to the power supply cabinet;

[0075] During the re-inspection, the power supply cabinet provides current output in the same way, and the power supply cabinet and the six-and-a-half-digit multimeter simultaneously sample, and compare whether the error between the multimeter sampling value and the power supply cabinet sampling value is within the accuracy range;

[0076] The details are as follows:

[0077] Charging current adjustment: As shown in the figure, switch S3 is closed, and the positive channel and the negative channel are short-circuited;

[0078] Discharge current adjustment: As shown in the figure, switches S1 and S2 are closed, and the constant voltage output switching power supply V1 is connected in series between the positive and negative electrodes. The channels are cut individually, and when a group of channels is cut through, the power supply V1 voltage will be connected to the same stage crimping point for adjustment.

[0079] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A battery charging and discharging equipment accuracy and line sequence calibration tooling system, characterized in that: The invention comprises a structural main body, wherein the structural main body comprises a needle bed and a tool, and the structural main body also comprises a battery charge and discharge calibration tool system, wherein the battery charge and discharge calibration tool system comprises a host computer PC, a switch, a middle computer, a power cabinet, a calibration tool, a multimeter, a power chassis and a needle bed, and the battery charge and discharge calibration tool system also comprises a tool main control board, a tool switching adjustment logic, a current crimping probe, a tool crimping copper table, a voltage transfer board, a needle bed control, a current line transfer row, a current line, a sampling switch adjustment logic and a channel control logic; The tooling main control board includes an RS232 communication module, an RS485 communication module and a WAN network communication module. The tooling main control board is connected to the tooling switching adjustment logic to realize the function switching of controlling the entire tooling; The upper computer is connected to the intermediate computer for communication, the intermediate computer is connected to the power cabinet for communication via a WAN network communication module, the intermediate computer is connected to the calibration tooling for communication via an RS485 communication module, the intermediate computer is connected to the needle bed for communication via an RS485 communication module, and the tooling main control board is connected to the multimeter via a WAN network communication module; The current crimping probe is crimped with the tool crimping copper platform, and the current crimping probe completes the connection between the needle bed and the tool by crimping with the tool crimping copper platform; The tooling has multiple positive channels and negative channels, and each channel is equipped with an independent isolated MOS drive switch. The channel control logic is connected to the isolated MOS drive switch control, and the channel control logic transmits signal control by mutual plugging with the tooling main control board; The needle bed has multiple current probe modules, each of which is provided with three sampling lines, namely a current line, a voltage sampling line and a main voltage sampling line. The current line is used to transmit the output of the power module, while the voltage sampling line and the main voltage sampling line mainly sample the output voltage of the probe part for voltage mode adjustment data collection of the charging and discharging equipment; The voltage adapter board is connected to the voltage sampling line and the dual voltage sampling line. The voltage adapter board performs an adapter operation on the voltage sampling line and the dual voltage sampling line on each channel and then directly connects to the power supply chassis.

2. A battery charging and discharging equipment accuracy and line sequence calibration tooling system according to claim 1, characterized in that: The host computer PC is connected to the switch, and the intermediate computer is connected to the switch.

3. A battery charging and discharging equipment accuracy and line sequence calibration tooling system according to claim 1, characterized in that: The power cabinet is also provided with a pneumatic control, and the intermediate machine is communicatively connected with the pneumatic control.

4. A battery charging and discharging equipment accuracy and line sequence calibration tooling system according to claim 1, characterized in that: The current line is connected to a current line adapter bar, and the current line adapter bar is connected to a power supply chassis.

5. A battery charging and discharging equipment accuracy and line sequence calibration tooling system according to claim 1, characterized in that: The intermediate machine is connected to the tooling main control board.

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