Testing device for BMS insulation detection function

Abstract

The utility model relates to the technical field of battery management system detection, and provides a testing device for a BMS insulation detection function, which is characterized by comprising a box body and a resistor array arranged in the box body, the box body is provided with a direct current isolating switch, a resistor gear switch and a voltage gear change-over switch, the direct current isolating switch is connected with a power supply, and the resistor gear switch is connected with the voltage gear change-over switch. The resistor gear switches are connected with the direct current isolating switch, the resistor array comprises a first resistor string, a second resistor string, a third resistor string, a fourth resistor string and a fifth resistor string which are arranged on the printed circuit board, and the number of the voltage gear change-over switches is five. The five voltage gear change-over switches are respectively connected with the five resistor strings in a one-to-one correspondence manner, the resistor gear switch is connected with one of the voltage gear change-over switches, the number of each resistor string is four, the four resistor strings are connected in series to form four gears, and the voltage gear change-over switches are connected with one of the gears.

Description

Technical Field

[0001] This utility model belongs to the field of battery management system testing technology, and in particular relates to a testing device for BMS insulation testing function. Background Technology

[0002] Currently, when debugging and verifying the insulation resistance detection function of battery management systems (BMS) for power energy storage systems according to testing standards, it is necessary to adjust the resistance / voltage ratio under different input voltage ranges to measure the insulation resistance detection error. Existing technology lacks resistor arrays with suitable resistance values ​​corresponding to the voltage, requiring temporary soldering of resistors during product testing, which consumes significant time and material costs each time. Temporarily constructed resistor arrays cannot easily and quickly switch resistance values ​​between different arrays, affecting testing efficiency. Temporarily soldered resistor arrays pose safety hazards during use, easily causing high-voltage electric shock accidents. Furthermore, temporarily soldered resistor arrays have limited functionality and are prone to being idle.

[0003] To solve the above-mentioned technical problems, this utility model designs a testing device for BMS insulation detection function. Utility Model Content

[0004] This invention provides a testing device for BMS insulation detection function, aiming to solve the problem of not having a resistor array with suitable voltage and resistance values ​​when debugging and verifying the BMS insulation resistance detection function.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a testing device for BMS insulation detection function, comprising a housing and a resistor array disposed within the housing. The housing is equipped with a DC disconnect switch, a resistance range switch, and a voltage range selector switch. The DC disconnect switch is connected to a power supply, and the resistance range switch is connected to the DC disconnect switch. The resistor array includes a first resistor string, a second resistor string, a third resistor string, a fourth resistor string, and a fifth resistor string disposed on a printed circuit board. The number of voltage range selector switches is five, and each of the five voltage range selector switches is connected to one of the five resistor strings. Each resistance range switch is connected to one of the voltage range selector switches. Each resistor string contains four resistors, and the four resistor strings are connected in series to form four ranges. Each voltage range selector switch is connected to one of the ranges.

[0006] Based on the above technical solution, the resistance and voltage ratios of the first resistor string, the second resistor string, the third resistor string, the fourth resistor string, and the fifth resistor string are 30Ω / V, 80Ω / V, 100Ω / V, 500Ω / V, and 1000Ω / V, respectively.

[0007] Based on the above technical solution, the resistances of the first resistor string, the second resistor string, the third resistor string, the fourth resistor string, and the fifth resistor string are 11.25KΩ, 30KΩ, 37.5KΩ, 187.5KΩ, and 375KΩ, respectively.

[0008] Based on the above technical solution, the voltage of the four gears corresponding to each voltage gear selector switch is 375V, 750V, 1125V, and 1500V.

[0009] Based on the above technical solution, the number of printed circuit boards is four, and each printed circuit board is provided with a first resistor string, a second resistor string, a third resistor string, a fourth resistor string and a fifth resistor string. The four printed circuit boards are distributed in two layers, and are arranged in pairs.

[0010] Based on the above technical solution, each resistor string is provided with a corresponding terminal block, and the resistor string is connected to the voltage range selector switch through the terminal block.

[0011] Based on the above technical solution, a fuse is provided between the terminal block and the resistor string, and a fuse holder is provided around the fuse.

[0012] Based on the above technical solution, the DC disconnect switch, the resistance range switch and the voltage range selector switch are arranged side by side on the side wall of the enclosure and evenly spaced.

[0013] Based on the above technical solution, an insulating platform is provided on the top of the box.

[0014] Based on the above technical solution, a first support base and a second support base are provided above the insulating platform, and a current-carrying copper rod is provided between the first support base and the second support base. A Hall current sensor is provided on the current-carrying copper rod.

[0015] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0016] This invention enables the switching of different resistance levels by setting up a resistor array, a resistance level switch, and a voltage level switch. By setting up five sets of resistor strings with different resistances, and each set of resistor strings contains four resistors, it can quickly achieve the switching function of 20 different resistance levels, providing more convenient, safe and reliable test conditions for the insulation testing and debugging of the equipment and prototype under test. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a test device for BMS insulation detection function provided by this utility model;

[0019] Figure 2 This is a schematic diagram of another test device for BMS insulation detection function provided by this utility model;

[0020] Figure 3 This is a working circuit diagram of a test device for BMS insulation detection function provided by this utility model;

[0021] Figure 4 This is a schematic diagram of another test device for BMS insulation detection function provided by this utility model.

[0022] In the diagram: 1. Housing; 11. DC disconnect switch; 12. Resistance range switch; 13. Voltage range selector switch; 2. Resistor array; 21. Printed circuit board; 22. First resistor string; 23. Second resistor string; 24. Third resistor string; 25. Fourth resistor string; 26. Fifth resistor string; 27. Terminal block; 28. Fuse holder; 3. Insulating platform; 31. First support base; 32. Second support base; 33. Current-carrying copper rod; 34. Hall current sensor. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and examples:

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Combination Figure 1-4 As shown, this embodiment of the present disclosure provides a test device for BMS insulation detection function, including a housing 1 and a resistor array 2 disposed within the housing 1. The housing 1 is provided with a DC disconnect switch 11, a resistance range switch 12, and a voltage range selector switch 13. The DC disconnect switch 11 is connected to a power supply, and the resistance range switch 12 is connected to the DC disconnect switch 11. The resistor array 2 includes a first resistor string 22, a second resistor string 23, a third resistor string 24, a fourth resistor string 25, and a fifth resistor string 26 disposed on a printed circuit board 21. There are five voltage range selector switches 13, each of which is connected to one of the five resistor strings. Each resistance range switch 12 is connected to one of the voltage range selector switches 13. Each resistor string contains four resistors, which are connected in series to form four ranges. Each voltage range selector switch 13 is connected to one of the ranges.

[0028] The test apparatus for BMS insulation testing provided in the embodiments of this disclosure, such as Figure 3 As shown, by setting up resistor array 2, resistor range switch 12 and voltage range selector switch 13, it is possible to switch between different resistance ranges. By setting five sets of resistor strings with different resistances, and each set of resistor strings contains four resistors, it is possible to quickly achieve the switching function of 20 different resistance ranges, and provide more convenient, safe and reliable test conditions for the insulation testing and debugging of the equipment under test and the prototype.

[0029] Based on the above technical solution, the resistance and voltage ratios of the first resistor string 22, the second resistor string 23, the third resistor string 24, the fourth resistor string 25, and the fifth resistor string 26 are 30Ω / V, 80Ω / V, 100Ω / V, 500Ω / V, and 1000Ω / V, respectively.

[0030] Based on the above technical solution, the resistances of the first resistor string 22, the second resistor string 23, the third resistor string 24, the fourth resistor string 25 and the fifth resistor string 26 are 11.25KΩ, 30KΩ, 37.5KΩ, 187.5KΩ and 375KΩ, respectively.

[0031] Based on the above technical solution, the voltage of the four gears corresponding to each voltage level change switch 13 is 375V, 750V, 1125V, and 1500V.

[0032] Based on the above technical solutions, such as Figure 1 As shown, there are four printed circuit boards 21. Each printed circuit board 21 is equipped with a first resistor string 22, a second resistor string 23, a third resistor string 24, a fourth resistor string 25, and a fifth resistor string 26. The four printed circuit boards 21 are distributed in two layers, one above the other, and are arranged in pairs. The resistor array 2 adopts a modular design, consisting of four printed circuit boards 21, which are regularly distributed to facilitate later maintenance and replacement.

[0033] Based on the above technical solution, each resistor string is provided with a corresponding terminal 27, and the resistor string is connected to the voltage range selector switch 13 through the terminal 27.

[0034] Based on the above technical solution, a fuse is provided between the terminal 27 and the resistor string, and a fuse holder 28 is provided around the fuse.

[0035] Based on the above technical solutions, such as Figure 1 and Figure 4 As shown, the DC disconnect switch 11, the resistance range switch 12, and the voltage range selector switch 13 are arranged side by side on the side wall of the housing 1, with evenly spaced intervals.

[0036] Based on the above technical solutions, such as Figure 4 As shown, the top of the housing 1 is equipped with an insulating platform 3. The insulating platform 3 can be used as a test platform for safety regulations such as insulation resistance and insulation withstand voltage, thereby increasing the testing functionality of the testing device.

[0037] Based on the above technical solutions, such as Figure 4 As shown, a first support base 31 and a second support base 32 are provided above the insulating platform 3, and a current-carrying copper rod 33 is provided between the first support base 31 and the second support base 32. A Hall current sensor 34 is provided on the current-carrying copper rod 33.

[0038] Both the first support frame and the second support frame are provided with clamping parts, which are used to fix the current-carrying copper rod 33. The current-carrying copper rod 33 can be used for debugging and calibrating the Hall current sensor 34.

[0039] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A testing device for BMS insulation testing function, characterized in that, The device includes a housing and a resistor array housed within the housing. The housing is equipped with a DC disconnect switch, a resistance range switch, and a voltage range selector switch. The DC disconnect switch is connected to a power supply, and the resistance range switch is connected to the DC disconnect switch. The resistor array includes a first resistor string, a second resistor string, a third resistor string, a fourth resistor string, and a fifth resistor string mounted on a printed circuit board. There are five voltage range selector switches, each connected in a one-to-one correspondence with one of the five resistor strings. Each resistance range switch is connected to one of the voltage range selector switches. Each resistor string contains four resistors, and the four resistor strings are connected in series to form four ranges. Each voltage range selector switch is connected to one of the ranges.

2. The testing device for BMS insulation detection function according to claim 1, characterized in that, The resistance and voltage ratios of the first, second, third, fourth, and fifth resistor strings are 30Ω / V, 80Ω / V, 100Ω / V, 500Ω / V, and 1000Ω / V, respectively.

3. The testing device for BMS insulation testing function according to claim 2, characterized in that, The resistances of the first resistor string, the second resistor string, the third resistor string, the fourth resistor string, and the fifth resistor string are 11.25KΩ, 30KΩ, 37.5KΩ, 187.5KΩ, and 375KΩ, respectively.

4. The testing device for BMS insulation detection function according to claim 3, characterized in that, The voltage levels corresponding to the four voltage levels of each voltage level selector switch are 375V, 750V, 1125V, and 1500V.

5. The testing device for BMS insulation detection function according to claim 1, characterized in that, The number of printed circuit boards is four, and each printed circuit board is provided with a first resistor string, a second resistor string, a third resistor string, a fourth resistor string and a fifth resistor string. The four printed circuit boards are distributed in two layers, one above the other, and are arranged in pairs.

6. The testing apparatus for BMS insulation testing function according to any one of claims 1 to 5, characterized in that, Each resistor string has a corresponding terminal block, and the resistor string is connected to the voltage range selector switch via the terminal block.

7. The testing device for BMS insulation detection function according to claim 6, characterized in that, A fuse is provided between the terminal block and the resistor string, and a fuse holder is provided around the fuse.

8. The testing apparatus for BMS insulation testing function according to any one of claims 1 to 5, characterized in that, The DC disconnect switch, resistance range switch, and voltage range selector switch are arranged side by side on the side wall of the enclosure, with evenly spaced intervals.

9. The testing apparatus for BMS insulation testing function according to any one of claims 1 to 5, characterized in that, An insulating platform is provided on the top of the enclosure.

10. The testing device for BMS insulation testing function according to claim 9, characterized in that, The insulating platform is provided with a first support base and a second support base, and a current-carrying copper rod is provided between the first support base and the second support base. A Hall current sensor is provided on the current-carrying copper rod.

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