DCIR large-current calibration device

Abstract

The utility model discloses a DCIR large-current calibration device which comprises a controller, a sensor, a universal meter, a contactor, a switching power supply, a power board, a switching board and an adapter board. The controller is respectively connected with the sensor, the universal meter, the contactor and the switching board; the sensor is respectively connected with the contactor and the power board; the switching power supply is connected with the contactor; the power board is respectively connected with the switching board and the adapter board; the switching power supplies are 5V switching power supplies, and three 5V switching power supplies are adopted; the positive electrodes of the three 5V switching power supplies are connected in parallel through a copper bar to output a large-current total positive electrode, and the negative electrodes of the three 5V switching power supplies are connected in parallel through a copper bar to output a switching power supply large-current total negative electrode; 5V total positive output points of the three 5V switching power supplies are connected to the 1 + side of a normally open contact of the contactor; according to the device, the function of compatibility of high-rate and low-rate charge and discharge is realized, and the calibration problem of DCIR large-current equipment is solved by a large-current 5V power supply output by a plurality of switching power supplies in parallel.

Description

Technical Field

[0001] The utility model relates to the technical field of DCIR equipment, in particular to a DCIR high-current calibration device. Background Art

[0002] In recent years, battery production equipment has been developing rapidly, not only requiring higher and higher automation, but also higher and higher precision requirements for the equipment; DCIR tests are required during the battery production process to obtain the impedance of the battery during operation, and then evaluate the battery health. DCIR equipment needs to be calibrated before leaving the factory and after being used for a long time to improve accuracy. In order to ensure the reliability of DCIR equipment, an accurate calibration and measurement tooling needs to be used to calibrate it regularly.

[0003] Currently, a formation and grading calibration device is used for DCIR tests, but DCIR equipment often requires a relatively high charge and discharge rate for the battery, and the existing formation and grading equipment calibration device cannot bear it.

[0004] In view of this, it is an urgent technical problem for those skilled in the art to provide a DCIR high-current calibration device that can achieve compatibility of high and low rate charge and discharge and perform calibration. Summary of the Utility Model

[0005] To solve the above technical problems, the purpose of the utility model is to provide a DCIR high-current calibration device; through this device, the function of compatibility of high and low rate charge and discharge is realized, and the calibration problem of DCIR high-current equipment is solved by a large-current 5V power supply output in parallel by multiple switching power supplies.

[0006] The technical solution provided by the utility model is as follows:

[0007] A DCIR high-current calibration device includes: a controller, a sensor, a multimeter, a contactor, a switching power supply, a power board, a switching board, and an adapter board;

[0008] The controller is respectively connected to the sensor, the multimeter, the contactor, and the switching board;

[0009] The sensor is respectively connected to the contactor and the power board;

[0010] The switching power supply is connected to the contactor;

[0011] The power board is respectively connected to the switching board and the adapter board;

[0012] The switching power supply is a 5V switching power supply, and 3 of the 5V switching power supplies are used;

[0013] The positive poles of the three 5V switching power supplies are connected in parallel through a copper bar to output a total positive of a large current of the switching power supply, and the negative poles of the three 5V switching power supplies are connected in parallel through a copper bar to output a total negative of a large current of the switching power supply;

[0014] The 5V total positive output points of the three 5V switching power supplies are all connected to the normally open contact 1+ side of the contactor.

[0015] Preferably, the contactor is a DC contactor, and four DC contactors are used;

[0016] The normally open contact 1+ side of the first DC contactor KM1, the normally open contact 1+ side of the second DC contactor KM2, the normally open contact 2- side of the third DC contactor KM3, and the normally open contact 2- side of the fourth DC contactor KM4 are all connected to the B side of the current sensor;

[0017] The normally open contact 2- side of the first DC contactor KM1 and the normally open contact 2- side of the second DC contactor KM2 are both connected to the negative copper bar, and the normally open contact 1+ side of the third DC contactor KM3 and the normally open contact 1+ side of the fourth DC contactor KM4 are both connected to the switching power supply.

[0018] Preferably, 36 power boards are used, and two power boards are connected to one channel;

[0019] The positive contact of the power board is connected to the positive copper block of the adapter board;

[0020] All the negative poles of the power board are connected to the A side of the current sensor;

[0021] The coil of the power board is connected to the switching board.

[0022] Preferably, two switching boards are used;

[0023] The P2-P3 terminal blocks of the switching board 1 and the switching board 2 are both connected to the tooling control board;

[0024] The P4-P5 terminal blocks of the switching board 1 are all connected to the positive copper block of the adapter board, and the P4-P5 terminal blocks of the switching board 2 are all connected to the power board.

[0025] Preferably, the positive and negative copper blocks on the adapter board are used to simulate the positive and negative pole ears of the battery;

[0026] All the negative copper blocks of the adapter board are short-circuited to the total negative of the large current of the switching power supply through a copper bar.

[0027] The utility model provides a DCIR high current calibration device, comprising: a controller, a sensor, a multimeter, a contactor, a switching power supply, a power board, a switching board and an adapter board; the controller is respectively connected to the sensor, the multimeter, the contactor and the switching board; the sensor is respectively connected to the contactor and the power board; the switching power supply is connected to the contactor; the power board is respectively connected to the switching board and the adapter board; the switching power supply is a 5V switching power supply, and three 5V switching power supplies are used; the positive poles of the three 5V switching power supplies are connected in parallel through a copper busbar to output a switching power supply high current total positive, and the negative poles of the three 5V switching power supplies are connected in parallel through a copper busbar to output a switching power supply high current total negative; the 5V total positive output points of the three 5V switching power supplies are all connected to the normally open contact 1+ side of the contactor; the device realizes the function of high and low rate charge and discharge compatibility, and the high current 5V power supply output by multiple switching power supplies in parallel solves the calibration problem of DCIR high current equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A topological structure diagram of a DCIR high current calibration device in an embodiment of the utility model;

[0030] Figure 2 This is an electrical schematic diagram of another DCIR high current calibration device in an embodiment of the utility model. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1 As shown, the embodiment of the utility model provides a DCIR high current calibration device, including: a controller 1, a sensor 2, a multimeter 3, a contactor 4, a switching power supply 5, a power board 6, a switching board 7 and an adapter board 8;

[0033] The controller 1 is respectively connected to the sensor 2, the multimeter 3, the contactor 4, and the switching board 7;

[0034] The sensor 2 is respectively connected to the contactor 4 and the power board 6;

[0035] The switching power supply 5 is connected to the contactor 4;

[0036] The power board 6 is respectively connected to the switching board 7 and the adapter board 8;

[0037] The switching power supply 5 is a 5V switching power supply, and 3 such 5V switching power supplies are adopted;

[0038] The positive poles of the 3 5V switching power supplies are connected in parallel through a copper bar to output a total positive of the switching power supply large current, and the negative poles of the 3 5V switching power supplies are connected in parallel through a copper bar to output a total negative of the switching power supply large current;

[0039] The 5V total positive output points of the 3 5V switching power supplies are all connected to the normally open contact 1+ side of the contactor 4.

[0040] In the actual application process, the controller is set to be respectively connected to the sensor, the multimeter, and the contactor; the sensor is respectively connected to the contactor and the power board; the switching power supply is connected to the contactor; the power board is connected to the adapter board; the switching board is respectively connected to the controller, the adapter board, and the power board; in terms of hardware, 3 5V switching power supplies are adopted. The positive poles of the 3 5V switching power supplies are connected in parallel through a copper bar to output a total positive of the switching power supply large current, and the negative poles of the 3 5V switching power supplies are connected in parallel through a copper bar to output a total negative of the switching power supply large current. The 5V total positive output points of the 3 5V switching power supplies are all connected to the normally open contact 1+ side of the contactor. And when paralleling at the output end, using the built-in active current sharing function of the switching power supply can improve the output power, thereby solving the calibration problem of DCIR large current equipment by the large current 5V power supply output by paralleling multiple switching power supplies.

[0041] Its working principle is that when the controller receives the calibration command sent by the master computer to the device to be calibrated through RS485 communication, it controls the contactor to switch to the corresponding working state according to the charge / discharge instruction. During the discharge process, 3 switching power supplies supply large current, and at the same time, it controls the switching board and the power board to switch channels; then the master computer issues a charge / discharge instruction to the external power supply. The controller uses the Ethernet communication method to read the voltage or current data measured by the multimeter and transmits the data to the master computer through RS485 communication; finally, the master computer uploads the actual data of the multimeter and the data collected by the external power supply module to the upper computer system, and the upper computer compares whether the actual value of the multimeter, the external power supply sampling value, and the issued command value meet the accuracy requirements; the function of compatible high and low rate charge and discharge is realized through this device; such as Figure 2As shown in the figure, in this embodiment, the tooling control board is denoted by KZB1; the current sensor is denoted by HE1; the multimeter is denoted by WYB; the switching power supplies are denoted by G5 - G7; the power boards are denoted by GLB1 - 36; the switching boards are denoted by QHB1 - 2; and the adapter board is denoted by ZJB. And 18 channels are adopted, and the number of channels is not limited and can be adjusted according to the actual equipment requirements.

[0042] Preferably, the controller 1 is the tooling control board.

[0043] In the actual operation process, the controller adopted is the tooling control board, and the tooling control board is used as the control center of the entire calibration tooling.

[0044] Preferably, the sensor is the current sensor.

[0045] In the actual operation process, the sensor adopted is the current sensor. The A side of the current sensor is connected to the short - circuit point of the negative - pole outputs of all power boards, and the B side of the current sensor is connected to the contactor for measuring the channel current; the current sensor is connected to the tooling control board to transmit the channel measurement data.

[0046] Preferably, the contactor 4 is a DC contactor, and 4 such DC contactors are adopted;

[0047] The normally - open contact 1+ side of the first DC contactor KM1, the normally - open contact 1+ side of the second DC contactor KM2, the normally - open contact 2 - side of the third DC contactor KM3, and the normally - open contact 2 - side of the fourth DC contactor KM4 are all connected to the B side of the current sensor;

[0048] The normally - open contact 2 - side of the first DC contactor KM1 and the normally - open contact 2 - side of the second DC contactor KM2 are both connected to the negative - pole copper bar, and the normally - open contact 1+ side of the third DC contactor KM3 and the normally - open contact 1+ side of the fourth DC contactor KM4 are both connected to the switching power supply.

[0049] In the actual operation process, 4 DC contactors are adopted, denoted by KM1, KM2, KM3, and KM4 respectively. As Figure 2 shown, the coils of the DC contactors are all connected to the tooling control board. The tooling control board sends commands to switch the charge - discharge function. The normally - open contact 1+ side of the first DC contactor KM1, the normally - open contact 1+ side of the second DC contactor KM2, the normally - open contact 2 - side of the third DC contactor KM3, and the normally - open contact 2 - side of the fourth DC contactor KM4 are all connected to the B side of the current sensor. The normally - open contact 2 - sides of the DC contactors KM1 and KM2 are both connected to the negative - pole copper bar, and the normally - open contact 1+ sides of the DC contactors KM3 and KM4 are both connected to the switching power supply.

[0050] Preferably, 36 pieces of the power boards 6 are adopted, and two of the power boards 6 are connected to one channel;

[0051] The positive contact of the power board 6 is connected to the positive copper block of the adapter board 7;

[0052] All the negative poles of the power board 6 are connected to the A side of the current sensor;

[0053] The coil of the power board 6 is connected to the switching board 8.

[0054] In actual operation, 36 power boards are adopted, and two power boards are connected to one channel, simultaneously meeting the calibration mode for the high and low charge-discharge rates of the battery. During low-rate charge-discharge, only one power board is used; during high-rate charge-discharge, two power boards are enabled simultaneously. Among them, the positive contact of the power board is connected to the adapter board, all the negative poles are connected to the A side of the current sensor, and the coil of the power board is connected to the switching board.

[0055] Preferably, the positive and negative copper blocks on the adapter board 7 are used to simulate the positive and negative electrode tabs of the battery;

[0056] All the negative copper blocks of the adapter board 7 are short-circuited to the large-current total negative of the switching power supply by a copper busbar.

[0057] In actual operation, the positive and negative copper blocks on the adapter board are used to simulate the positive and negative electrode tabs of the battery, all the negative copper blocks are short-circuited to the large-current total negative of the switching power supply by a copper busbar, and the positive contact of the power board is connected to the copper block on the adapter board that simulates the positive electrode tab of the battery.

[0058] Preferably, 2 pieces of the switching boards 8 are adopted;

[0059] The P2 - P3 terminal blocks of the switching board 1 and the switching board 2 are both connected to the tooling control board;

[0060] The P4 - P5 terminal blocks of the switching board 1 are both connected to the positive copper block of the adapter board, and the P4 - P5 terminal blocks of the switching board 2 are both connected to the power board.

[0061] In actual operation, the P2 - P3 terminal blocks of the switching boards QHB1 and QHB2 are connected to the tooling control board. The tooling control board controls the on-off of the channels of the switching boards. The P4 - P5 terminal blocks of the switching board QHB1 are connected to the positive copper block of the adapter board to complete the function of line sequence calibration, and the P4 - P5 terminal blocks of the switching board QHB2 are connected to the power board to turn on and off the power board for current testing of the switching channels.

[0062] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0063] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0064] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" or "several" is two or more, unless otherwise specifically and clearly defined.

[0065] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A DCIR large current calibration device, characterized in that, Including: A controller, a sensor, a multimeter, a contactor, a switching power supply, a power board, a switching board, and an adapter board; The controller is respectively connected to the sensor, the multimeter, the contactor, and the switching board; The sensor is respectively connected to the contactor and the power board; The switching power supply is connected to the contactor; The power board is respectively connected to the switching board and the adapter board; The switching power supply is a 5V switching power supply, and three such 5V switching power supplies are adopted; The positive poles of the three 5V switching power supplies are connected in parallel through a copper bar to output a total positive of the switching power supply large current, and the negative poles of the three 5V switching power supplies are connected in parallel through a copper bar to output a total negative of the switching power supply large current; The 5V total positive output points of the three 5V switching power supplies are all connected to the normally open contact 1+ side of the contactor.

2. The DCIR high current calibration device according to claim 1, characterized in that, The controller is a tooling control board.

3. The DCIR high-current calibration device according to claim 1, characterized in that The sensor is a current sensor.

4. The DCIR high-current calibration device according to claim 3, characterized in that, The contactor is a DC contactor, and four such DC contactors are adopted; The normally open contact 1+ sides of the first DC contactor KM1, the second DC contactor KM2, the normally open contact 2- side of the third DC contactor KM3, and the normally open contact 2- side of the fourth DC contactor KM4 are all connected to the B side of the current sensor; The normally open contact 2- sides of the first DC contactor KM1 and the second DC contactor KM2 are both connected to the negative copper bar, and the normally open contact 1+ sides of the third DC contactor KM3 and the fourth DC contactor KM4 are both connected to the switching power supply.

5. The DCIR large current calibration device according to claim 3, characterized in that, Thirty-six such power boards are adopted, and two power boards are connected to one channel; The positive pole contact of the power board is connected to the positive copper block of the adapter board; All the negative poles of the power board are connected to the A side of the current sensor; The coil of the power board is connected to the switching board.

6. The DCIR high-current calibration device according to claim 2, characterized in that, Two such switching boards are adopted; The P2-P3 terminal blocks of the switching board 1 and the switching board 2 are both connected to the tooling control board; The P4-P5 terminal blocks of the switching board 1 are all connected to the positive copper block of the adapter board, and the P4-P5 terminal blocks of the switching board 2 are all connected to the power board.

7. The DCIR high-current calibration device according to claim 1, wherein The positive and negative copper blocks on the adapter board are used to simulate the positive and negative ear tabs of the battery; All the negative copper blocks of the adapter board are short-circuited to the total negative of the switching power supply large current through a copper bar.

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