Battery pack simulation sampling module and device for testing battery management system

Abstract

The invention provides a battery pack simulation sampling module for testing a battery management system, which comprises a PCB (Printed Circuit Board), a plurality of battery cells, a plurality of voltage sampling loop switches, a plurality of temperature sampling loop switches, a plurality of voltage sampling wiring terminals and a plurality of temperature sampling wiring terminals are arranged on the front surface of the PCB, a plurality of battery cells are sequentially connected in series, each battery cell is connected with a corresponding voltage sampling loop switch in series and connected with a voltage sampling wiring terminal in series, a plurality of NTC resistors are arranged on the back face of the PCB, the NTC resistors and the battery cells are arranged in a one-to-one correspondence mode, and each NTC resistor is connected with a corresponding temperature sampling loop switch in series and connected with a temperature sampling wiring terminal in series. Compared with the prior art, the testing device is miniaturized, the cost is reduced, and the testing process is more convenient and safer. The invention further discloses a battery pack simulation sampling device for testing the battery management system.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery management system testing, and in particular relates to a battery pack simulation sampling module and device for testing a battery management system. Background Art

[0002] At present, the laboratory needs to use multiple battery packs to string together into a battery cluster to build an energy storage system during the functional verification of battery management system (BMS) products to verify the charging and discharging functions of the entire system, the single cell voltage and temperature sampling functions, single point failure functions, etc. The energy storage system (215kWh) built with rated battery capacity weighs more than 1T, and the system construction environment will be limited due to its own load-bearing capacity; the rated capacity energy storage system has safety risks in the process of cooperating with BMS for various functional verifications and debugging during the R&D stage, and the loss of system control will lead to irreversible consequences; the standard energy storage system assembled in normal production has operational difficulties when setting up abnormal working conditions, and it is easy to increase safety risks in the test.

[0003] In order to solve the above technical problems, the present invention designs a battery pack simulation sampling module and device for testing a battery management system. Summary of the invention

[0004] The present invention provides a battery pack simulation sampling module and device for testing a battery management system, which is intended to be convenient and safe while satisfying multi-channel voltage, temperature sampling simulation functions and sampling fault simulation functions.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a battery pack simulation sampling module for testing a battery management system, comprising a PCB board, wherein the front side of the PCB board is provided with a battery cell, a voltage sampling loop switch, a temperature sampling loop switch, a voltage sampling terminal and a temperature sampling terminal, wherein the number of the battery cells, the voltage sampling loop switch and the temperature sampling loop switch is multiple, and the multiple battery cells are connected in series in sequence, and each battery cell is connected in series with the corresponding voltage sampling loop switch and the voltage sampling terminal, and the back side of the PCB board is provided with a plurality of NTC resistors, wherein the plurality of NTC resistors are arranged in one-to-one correspondence with the plurality of battery cells, and each NTC resistor is connected in series with the corresponding temperature sampling loop switch and the temperature sampling terminal.

[0006] Based on the above technical solution, the number of the voltage sampling loop switches is one more than the number of the battery cells, and the number of the temperature sampling loop switches is two more than the number of the battery cells.

[0007] Based on the above technical solution, a serpentine fuse and a patch nut are provided on the back of the PCB board, the serpentine fuse is connected in series in the voltage sampling circuit, and the patch nut is arranged corresponding to the positive electrode of the battery cell.

[0008] Based on the above technical solution, a battery cell installation groove is provided on the front side of the PCB board, the number of the battery cell installation grooves is multiple, and the battery cells are arranged in the battery cell installation grooves.

[0009] Based on the above technical solution, a fuse holder is provided on the front side of the PCB board, a fuse is provided in the fuse holder, and the fuse is connected in series between two adjacent battery cells.

[0010] Based on the above technical solution, the voltage sampling terminal and the temperature sampling terminal are both double-layer plug-in terminals.

[0011] On the basis of the above technical solution, the battery pack simulation sampling module for testing the battery management system also includes a battery management unit, and the battery management unit is connected to the voltage sampling terminal and the temperature sampling terminal.

[0012] On the basis of the above technical solution, the PCB board is also provided with module series wiring terminals, the number of which is two, and the two module series wiring terminals are respectively arranged at both ends of the PCB board, one module series wiring terminal is connected to the positive electrode of the battery cell at one end, and the other module series wiring terminal is connected to the negative electrode of the battery cell at the other end.

[0013] In a second aspect, the present invention provides a battery pack simulation sampling device for testing a battery management system, comprising a movable stand and a plurality of battery pack simulation sampling modules for testing a battery management system as described in any one of the above embodiments, wherein the plurality of sampling modules are arranged on the movable stand, and when a module series connection terminal is provided on a PCB board, the plurality of sampling modules are connected in series in sequence through the module series connection terminals.

[0014] On the basis of the above technical solution, the battery pack simulation sampling device for testing the battery management system further includes a battery cluster management unit, and the battery cluster management unit is arranged on a movable stand.

[0015] Compared with the related art, the beneficial effects of the present invention are as follows: The present invention forms a voltage sampling loop by connecting a battery cell, a voltage sampling loop switch and a voltage sampling wiring terminal in series, so as to perform voltage sampling simulation and voltage sampling loop fault simulation. The present invention forms a temperature sampling loop by connecting an NTC resistor, a temperature sampling loop switch and a temperature sampling wiring terminal in series, so as to perform temperature sampling simulation and temperature sampling loop open circuit or short circuit fault simulation, and also small current charge and discharge simulation. Compared with the related art, the test device is miniaturized and visualized in design, so as to reduce the cost and make the simulation test process more convenient and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of a battery pack simulation sampling module for testing a battery management system provided by the present invention; Figure 2 is a structural schematic diagram of another battery pack simulation sampling module for testing a battery management system provided by the present invention; Figure 3 It is a working circuit diagram of a battery pack simulation sampling module for testing a battery management system provided by the present invention; Figure 4 It is a structural schematic diagram of a battery pack simulation sampling device for testing a battery management system provided by the present invention.

[0018] In the figure: 1. Battery pack simulation sampling module; 2. PCB board; 21. Battery cell; 211. Battery cell mounting slot; 22. Voltage sampling loop switch; 23. Temperature sampling loop switch; 24. Voltage sampling terminal; 25. Temperature sampling terminal; 26. NTC resistor; 27. Snake fuse; 28. SMD nut; 29. ​​Fuse holder; 30. Module series terminal; 31. Battery management unit; 4. Movable stand; 41. Wiring trough; 5. Battery cluster management unit. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and examples: Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be understood as a limitation on the present invention.

[0022] Combination Figure 1-3 As shown, the embodiment of the present disclosure provides a battery pack simulation sampling module 1 for testing a battery management system, including a PCB board 2, wherein the front of the PCB board 2 is provided with a battery cell 21, a voltage sampling loop switch 22, a temperature sampling loop switch 23, a voltage sampling terminal 24 and a temperature sampling terminal 25, wherein the number of the battery cell 21, the voltage sampling loop switch 22 and the temperature sampling loop switch 23 is multiple, and the multiple battery cells 21 are connected in series in sequence, and each battery cell 21 is connected in series with the corresponding voltage sampling loop switch 22 and the voltage sampling terminal 24, and the back of the PCB board 2 is provided with a plurality of NTC resistors 26, and the plurality of NTC resistors 26 are arranged in a one-to-one correspondence with the plurality of battery cells 21, and each NTC resistor 26 is connected in series with the corresponding temperature sampling loop switch 23 and the temperature sampling terminal 25.

[0023] The battery pack simulation sampling module 1 for testing the battery management system provided by the embodiment of the present disclosure is used, as shown in FIG. Figure 1-3 As shown, by connecting the battery cell 21, the voltage sampling loop switch 22 and the voltage sampling terminal 24 in series to form a voltage sampling loop, voltage sampling simulation and voltage sampling loop fault simulation can be performed; by connecting the NTC resistor 26, the temperature sampling loop switch 23 and the temperature sampling terminal 25 in series to form a temperature sampling loop, temperature sampling simulation and temperature sampling loop open circuit or short circuit fault simulation can be performed, and small current charging and discharging simulation can also be performed. Compared with the related art, the test device is miniaturized and visualized in design, which reduces costs and makes the simulation test process more convenient and safer.

[0024] Based on the above technical solution, the number of the voltage sampling loop switches 22 is one more than the number of the battery cells 21 , and the number of the temperature sampling loop switches 23 is two more than the number of the battery cells 21 .

[0025] This application does not limit the number of battery cells 21, voltage sampling circuit switches 22, and temperature sampling circuit switches 23. The disclosed embodiment takes the number of battery cells 21 as 18 as an example, and the number of voltage sampling circuit switches 22 is 19, of which 18 voltage sampling circuit switches 22 correspond to the 18 battery cells 21 one by one, respectively collecting the positive terminal voltage of the 18 battery cells 21, and using the same negative pole as the voltage reference, and the remaining voltage sampling circuit switch 22 corresponds to the negative pole of the power supply. There are 20 temperature sampling circuit switches 23, of which 18 temperature sampling circuit switches 23 correspond to the 18 battery cells 21 one by one, and the remaining two correspond to fuses.

[0026] Specifically, the battery cell 21 in the embodiment of the present disclosure adopts a lithium iron phosphate battery cell 21 with a model number of 18650. The rated capacity of the battery cell 21 is 1.5Ah and the voltage is 3.2V. The battery cell 21 can better meet the needs of miniaturization. The material of lithium iron phosphate makes the analog sampling module safer. The setting of the small-capacity battery cell 21 also fully considers the safety factor to avoid uncontrollable phenomena in the event of thermal runaway.

[0027] Based on the above technical solution, Figure 2 As shown, a serpentine fuse 27 and a patch nut 28 are provided on the back of the PCB board 2. The serpentine fuse 27 is connected in series in the voltage sampling circuit, and the patch nut 28 is arranged corresponding to the positive pole of the battery cell 21.

[0028] The setting of the serpentine fuse 27 can ensure the circuit safety under abnormal conditions and improve the overall safety of use. The setting of the patch nut 28 can expand the scope of use of the analog sampling module. When the number of cells 21 required for testing a special battery management system is less than the number of installed cells 21, the excess cells 21 can be removed, and the positive pole of the circuit can be directly connected to the patch nut 28 corresponding to the target cell 21, which can ensure the normal progress of subsequent tests and avoid the situation where the residual capacity inside the cell 21 of the analog sampling module is different.

[0029] Based on the above technical solution, Figure 1 As shown, the front side of the PCB board 2 is provided with a battery cell 21 mounting groove, the number of the battery cell 21 mounting grooves is multiple, and the battery cell 21 is arranged in the battery cell 21 mounting groove.

[0030] Optionally, a nylon handle is further provided on the front side of the PCB board 2. There are two nylon handles, which are respectively arranged at both ends of the PCB board 2. The setting of the nylon handle can facilitate the taking and moving of the sampling module while taking into account the insulation and anti-static effects.

[0031] Based on the above technical solution, Figure 1As shown, a fuse holder 29 is provided on the front of the PCB board 2, and a fuse is provided in the fuse holder 29, and the fuse is connected in series between two adjacent battery cells 21. The setting of the fuse can fully guarantee the breaking capacity in abnormal situations such as loop or short circuit.

[0032] Based on the above technical solution, the voltage sampling terminal 24 and the temperature sampling terminal 25 are both double-layer plug-in terminals. The double-layer plug-in terminals can be conveniently connected to the battery management unit 31 for data transmission.

[0033] Based on the above technical solution, Figure 1 As shown, the battery pack simulation sampling module 1 for testing the battery management system also includes a battery management unit 31, which is connected to the voltage sampling terminal 24 and the temperature sampling terminal 25. The battery management unit 31 is mainly responsible for monitoring the basic parameters of the simulation sampling module, such as voltage, temperature, etc. It has high-precision sensors and data acquisition circuits, and can obtain accurate battery cell 21 status information in real time. By analyzing and processing this information, it provides basic data support for the entire battery management system.

[0034] Based on the above technical solution, the PCB board 2 is also provided with a module series terminal 30, and the number of the module series terminal 30 is two. The two module series terminal 30 are respectively arranged at both ends of the PCB board 2, one module series terminal 30 is connected to the positive electrode of the battery cell 21 at one end, and the other module series terminal 30 is connected to the negative electrode of the battery cell 21 at the other end.

[0035] like Figure 4 As shown, the present invention also provides a battery pack simulation sampling device for testing a battery management system, comprising a movable stand 4 and a plurality of battery pack simulation sampling modules 1 for testing a battery management system as described in any one of the above embodiments, wherein the plurality of sampling modules are arranged on the movable stand 4, and when the PCB board 2 is provided with a module series connection terminal 30, the plurality of sampling modules are connected in series in sequence through the module series connection terminal 30.

[0036] The battery pack simulation sampling device for testing the battery management system provided by the embodiment of the present disclosure can simulate the test environment of an entire cluster of BMS systems, realize the integration of more channel voltage and temperature sampling environments, and has a high degree of integration, which greatly improves the convenience of testing, saves laboratory testing space, improves test safety, and reduces the limitations on the test environment construction site.

[0037] On the basis of the above technical solution, the battery pack simulation sampling device for testing the battery management system further includes a battery cluster management unit 5 , and the battery cluster management unit 5 is arranged on the movable stand 4 .

[0038] Optionally, the analog sampling device is further provided with a wiring groove 41, which extends in the horizontal direction of the stand and is used to hide the wiring between the analog sampling module and the battery management unit 31 and the battery cluster management unit 5, thereby improving the aesthetics and safety.

[0039] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications made based on the present invention belong to the scope of protection claimed by the present invention.

Claims

1. A battery pack simulation sampling module for testing a battery management system, characterized in that: It comprises a PCB board, wherein the front side of the PCB board is provided with a battery cell, a voltage sampling loop switch, a temperature sampling loop switch, a voltage sampling terminal and a temperature sampling terminal, the number of the battery cells, the voltage sampling loop switch and the temperature sampling loop switch is multiple, the multiple battery cells are connected in series in sequence, each battery cell is connected in series with the corresponding voltage sampling loop switch and the voltage sampling terminal, and the back side of the PCB board is provided with a plurality of NTC resistors, the plurality of NTC resistors are arranged in one-to-one correspondence with the plurality of battery cells, each NTC resistor is connected in series with the corresponding temperature sampling loop switch and the temperature sampling terminal.

2. The battery pack simulation sampling module for testing a battery management system according to claim 1, characterized in that: The number of the voltage sampling loop switches is one more than the number of the battery cells, and the number of the temperature sampling loop switches is two more than the number of the battery cells.

3. The battery pack simulation sampling module for testing a battery management system according to claim 1, characterized in that: A serpentine fuse and a patch nut are provided on the back of the PCB board. The serpentine fuse is connected in series in the voltage sampling circuit, and the patch nut is arranged corresponding to the positive pole of the battery cell.

4. The battery pack simulation sampling module for testing a battery management system according to claim 1, characterized in that: The front side of the PCB board is provided with a battery cell installation groove, the number of the battery cell installation grooves is multiple, and the battery cells are arranged in the battery cell installation grooves.

5. The battery pack simulation sampling module for testing a battery management system according to claim 1, characterized in that: A fuse holder is arranged on the front side of the PCB board, a fuse is arranged in the fuse holder, and the fuse is connected in series between two adjacent battery cells.

6. The battery pack simulation sampling module for testing a battery management system according to any one of claims 1 to 5, characterized in that: The voltage sampling wiring terminal and the temperature sampling wiring terminal are both double-layer plug-in wiring terminals.

7. The battery pack simulation sampling module for testing a battery management system according to any one of claims 1 to 5, characterized in that: It also includes a battery management unit, which is connected to the voltage sampling terminal and the temperature sampling terminal.

8. The battery pack simulation sampling module for testing a battery management system according to any one of claims 1 to 5, characterized in that: The PCB board is also provided with module series wiring terminals, the number of which is two, and the two module series wiring terminals are respectively arranged at both ends of the PCB board, one module series wiring terminal is connected to the positive electrode of the battery cell at one end, and the other module series wiring terminal is connected to the negative electrode of the battery cell at the other end.

9. A battery pack simulation sampling device for testing a battery management system, characterized in that: It comprises a movable stand and a plurality of battery pack simulation sampling modules for testing a battery management system as described in any one of claims 1 to 8, wherein the plurality of sampling modules are arranged on the movable stand, and when a module series connection terminal is provided on a PCB board, the plurality of sampling modules are connected in series in sequence through the module series connection terminal.

10. The battery pack simulation sampling device for testing a battery management system according to claim 9, characterized in that: The utility model also comprises a battery cluster management unit, wherein the battery cluster management unit is arranged on a movable stand.

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