CN211236027U

CN211236027U - Rotary resistance box

Info

Publication number: CN211236027U
Application number: CN201922131807.XU
Authority: CN
Inventors: 方晨; 王深思; 周正飞; 金华东
Original assignee: SAIC Volkswagen Automotive Co Ltd
Current assignee: SAIC Volkswagen Automotive Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-08-11
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses a rotation type resistance box, include: box body, circuit board subassembly and rotary switch. The box body is provided with a plug-in port. The circuit board assembly is installed in the box body, a plurality of parallel test circuits are arranged on the circuit board assembly, a resistor is connected in series on each test circuit, the resistors connected in series on different test circuits are different in resistance value, and the test circuits are electrically connected with the plug-in ports. The rotary switch is arranged on the box body, a conductive path is arranged on the rotary switch, the rotary switch rotates, the conductive path is communicated with one of the test circuits, and the resistors connected in series on the test circuits are connected into the circuits connected with the plug ports. The utility model discloses a rotation type resistance box can select the resistance value of resistance through rotary switch, realizes that one set of equipment carries out high-voltage system insulation resistance and measures and insulating alarming function verification. The test equipment is convenient to operate and maintain, the test cost can be reduced, and the test efficiency is improved.

Description

Rotary resistance box

Technical Field

The utility model relates to an automotive test equipment field, more specifically say, relate to an equipment that tests car high-pressure system.

Background

The voltage of a high-voltage electrical system of a new energy automobile is generally 300-400V, and the safety problem of the electrical system needs to be considered particularly in the development process. Therefore, the insulation resistance of the high-voltage system of the new energy automobile in the charged state can be measured in different stages, and the insulation alarm function of the whole automobile can be verified and tested. According to the test method in the prior art, for the insulation resistance measurement of the high-voltage system, a double-meter method is generally adopted to measure the insulation resistance of the high-voltage system, that is, a low internal resistance universal meter and a high internal resistance universal meter are respectively used, the low internal resistance universal meters and the high internal resistance universal meters are connected into a high-voltage loop of the new energy automobile to respectively measure the voltages between a positive electrode and a negative electrode and a vehicle electric platform, and then the insulation resistance value of the high-voltage system. The method needs two multimeters with different internal resistances, and is complex in operation and high in test cost. For the test of the insulation alarm function of the whole vehicle, a set of special variable resistance boxes are generally connected in parallel to a high-voltage system of the new energy vehicle, the change of the insulation resistance value between the high-voltage system and a level platform of the whole vehicle is realized by adjusting the resistance value, the insulation alarm function of the whole vehicle is activated when the insulation resistance is low to a certain degree, the operation is complex, special training is needed, the test is expensive and troublesome, and the test is not favorable for developing low-cost, high-frequency, multi-scenario and high-reliability tests.

SUMMERY OF THE UTILITY MODEL

The utility model provides an easy operation, car high-pressure system test equipment that test efficiency is high.

According to the utility model discloses an embodiment provides a rotation type resistance box, include: box body, circuit board subassembly and rotary switch. The box body is provided with a plug-in port. The circuit board assembly is installed in the box body, a plurality of parallel test circuits are arranged on the circuit board assembly, a resistor is connected in series on each test circuit, the resistors connected in series on different test circuits are different in resistance value, and the test circuits are electrically connected with the plug-in ports. The rotary switch is arranged on the box body, a conductive path is arranged on the rotary switch, the rotary switch rotates, the conductive path is communicated with one of the test circuits, and the resistors connected in series on the test circuits are connected into the circuits connected with the plug ports.

In one embodiment, a wiring board assembly comprises: circuit board, several resistance and array contact terminal. The circuit board is provided with a conductive circuit. The plurality of resistors are arranged on the back surface of the circuit board, and the resistance values of the plurality of resistors are different. The array of contact terminals are mounted on the front surface of the circuit board. The conductive line forms a plurality of parallel test lines, each of which has a resistor and a set of contact terminals connected in series, wherein the set of contact terminals are spaced apart such that the test lines are disconnected at the contact terminals. The conductive circuit also comprises a plug wire, and the plurality of test circuits are connected in parallel and then electrically connected with the plug port through the plug wire.

In one embodiment, a rotary switch includes: a turntable, a rotating handle and a conductive path. The rotating handle is arranged on the top surface of the rotating disc. The conductive path is installed on the bottom surface of the turntable, and comprises two contact heads and a connecting line for connecting the two contact heads, wherein the two contact heads are arranged on the circumference of the turntable and are positioned on the same diameter of the turntable.

In one embodiment, the periphery of the bottom surface of the turntable is formed with a raised circular ring, a conductor groove is arranged along the diameter direction of the turntable, two bosses are formed at the junction of the two ends of the conductor groove and the circular ring, the contact heads are arranged on the bosses, and the connecting wires are arranged in the conductor groove.

In one embodiment, the sets of contact terminals are arranged along a circumference having a diameter matching the diameter of the turntable, and two contact terminals of a same set are located on the same diameter of the circumference. The rotary switch rotates, two contact heads of the conductive path are respectively contacted with two contact terminals in the same group, and the two contact terminals are communicated through the conductive path, so that a test circuit where the group of connection terminals is located is communicated.

In one embodiment, a cassette body includes a cassette body and a cassette cover. The box body is the cuboid molding of open-top, and circuit board subassembly installs at the box originally internally, installs the grafting port on the lateral wall of box body. The box upper cover is arranged on the box body and closes the opening of the box body, and the rotary switch is arranged on the box upper cover.

In one embodiment, the upper cover of the box is provided with a circular switch hole, the rotary switch is installed in the switch hole, and an indicating area is arranged around the periphery of the switch hole.

In one embodiment, the circuit board assembly is fixed in the box body by screws, and the box upper cover is fixed on the box body by screws.

In one embodiment, 5 parallel test lines are arranged on the circuit board assembly, and the resistance values of the resistors connected in series on the 5 test lines are respectively 50K Ω, 100K Ω, 200K Ω, 500K Ω and 10M Ω.

The utility model discloses a rotation type resistance box can select the resistance value of resistance through rotary switch, realizes that one set of equipment carries out high-voltage system insulation resistance and measures and insulating alarming function verification. The test equipment is convenient to operate and maintain, the test cost can be reduced, and the test efficiency is improved.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout, and in which:

fig. 1 discloses a structure diagram of a rotary resistor box according to an embodiment of the present invention.

Fig. 2 shows a structure diagram of the box body and the circuit board assembly in the rotary resistance box according to an embodiment of the present invention.

Fig. 3 discloses a structure diagram of a circuit board assembly in a rotary resistance box according to an embodiment of the present invention.

Fig. 4 discloses a circuit diagram of a circuit board assembly in a rotary resistor box according to an embodiment of the present invention.

Fig. 5 shows a structure diagram of a rotary switch in a rotary resistor box according to an embodiment of the present invention.

Fig. 6 is a schematic diagram illustrating a structure of a circuit board assembly and a rotary switch in a rotary resistor box according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1, fig. 1 shows a structural diagram of a rotary resistance box according to an embodiment of the present invention. This rotation type resistance box includes: box body, circuit board subassembly and rotary switch.

The housing has a connector port 105. In the illustrated embodiment, the cartridge body includes a cartridge body 101 and a cartridge cover 102. The box body 101 is a rectangular parallelepiped shape with an open top, and the circuit board assembly is mounted in the box body. A plug port 105 is mounted on a side wall of the cartridge body 101. In the illustrated embodiment, the insertion ports 105 are mounted on both shorter side walls of the cartridge body 101. The number of the plug ports 105 is four, and two plug ports 105 are mounted on each of the two side walls of the cartridge body 101. A cartridge upper cover 102 is mounted on the cartridge body 101 and closes an opening of the cartridge body 101, and a rotary switch 103 is mounted on the cartridge upper cover 102. In the illustrated embodiment, the cartridge upper cover 102 is fixed to the cartridge body 101 by screws 108. Screw holes are respectively formed at the four corners of the upper box cover 102 and the box body 101, and screws 108 penetrate through the corresponding screw holes on the upper box cover and the box body to fix the upper box cover and the box body together.

The wiring board assembly is mounted in the box body 101. Fig. 2 shows a structure diagram of the box body and the circuit board assembly in the rotary resistance box according to an embodiment of the present invention. The cartridge upper cover 102 is removed in fig. 2, showing the cartridge body 101 in an open state and the circuit board assembly therein. A plurality of parallel test circuits are arranged on the circuit board assembly, each test circuit is connected with a resistor in series, the resistors connected in series on different test circuits are different in resistance value, and the test circuits are electrically connected with the plug-in ports 105. In the illustrated embodiment, the wiring board assembly includes: a wiring board 104, a plurality of resistors 111, and an array of contact terminals 106. Conductive traces are disposed on the wiring board 104. The wiring board 104 is typically a PCB board and the conductive traces are copper traces printed on the PCB board. Referring to fig. 2, the circuit board assembly is fixed in the box body 101 by screws 107, and specifically, the circuit board 104 is fixed in the box body 101 by screws 107. Screw holes are respectively formed in the positions of the four corners of the circuit board 104 and the corresponding positions of the box body 101, and screws 107 penetrate through the corresponding screw holes in the circuit board and the box body to fix the circuit board and the box body together. The plurality of resistors 111 are mounted on the back surface of the circuit board 104, and the plurality of resistors 111 have different resistance values. An array of contact terminals 106 are mounted on the front surface of the wiring board 104. The conductive line forms a plurality of parallel test lines each having a resistor 111 and a set of contact terminals 106 connected in series, wherein the set of contact terminals are spaced apart such that the test lines are disconnected at the contact terminals. The conductive circuit further includes a plug wire, and the plurality of test circuits are electrically connected to the plug port 105 through the plug wire after being connected in parallel. Fig. 4 discloses a circuit diagram of a circuit board assembly in a rotary resistor box according to an embodiment of the present invention. In the embodiment shown in fig. 4, 5 parallel test lines are arranged on the circuit board assembly, and each test line has a resistor 111 connected in series. The resistance values of the resistors connected in series on the 5 test lines are 50K Ω, 100K Ω, 200K Ω, 500K Ω and 10M Ω, respectively. The conductive circuit further includes

plug wires

112 and 113, and the 5 test lines are electrically connected to the plug ports 105 on both sides of the cartridge body 101 through the

plug wires

112 and 113, respectively, after being connected in parallel.

The rotary switch 103 is mounted on the box 101, and has a conductive path, and the rotary switch rotates, and the conductive path is connected to one of the test lines, and the resistor connected in series on the test line is connected to the circuit connected to the plug port. Fig. 5 shows a structure diagram of a rotary switch in a rotary resistor box according to an embodiment of the present invention. As shown in fig. 5, the rotary switch 103 includes: a dial 131, a rotating handle 132, and a conductive path. A rotating handle 132 is mounted on the top surface of the turntable 131. The conductive path is mounted on the bottom surface of the turntable 131. The conductive path comprises two contacts 109 and a connection line 110 connecting the two contacts, the two contacts 109 being arranged on the circumference of the turntable and the two contacts 109 being located on the same diameter of the turntable. In the embodiment shown in fig. 5, the outer circumference of the bottom surface of the turntable 131 is formed with a raised circular ring 133, a conductor groove 134 is arranged along the diameter direction of the turntable 131, two bosses 135 are formed where both ends of the conductor groove interface with the circular ring, the contact head 109 is arranged on the bosses, and the connection wire 110 is arranged in the conductor groove 134. Returning to fig. 1, the rotary switch 103 is mounted on the cartridge upper cover 102. The upper cover 102 of the box is provided with a circular switch hole 121, the rotary switch 103 is installed in the switch hole 121, an indication area 122 is arranged around the periphery of the switch hole, and the indication area 122 indicates the resistance value of the resistor connected in series in the test circuit switched on by the rotary switch. The rotary switch 103 is mated with a contact terminal in the circuit board assembly. In order to match the structure of the rotary switch, the contact terminals are arranged in the following form. Fig. 3 shows a structure diagram of a circuit board assembly in a rotary resistor box according to an embodiment of the present invention, in which an arrangement of contact terminals is shown: the sets of contact terminals 106 are arranged along a circumference having a diameter matching the diameter of the turntable 131, and two contact terminals of the same set are located on the same diameter of the circumference. Fig. 6 is a schematic diagram illustrating a structure of a circuit board assembly and a rotary switch in a rotary resistor box according to an embodiment of the present invention. Referring to fig. 6, when the rotary switch rotates, the two contact heads 109 of the conductive path are respectively contacted with the two contact terminals 106 in the same group, the two contact terminals 106 are connected through the contact heads 109 and the connection line 110 in the conductive path, so that the test line where the group of connection terminals is located is connected, and the resistor 111 connected in series in the test line is connected into the circuit for testing. Matching the circuit board provided with 5 resistors shown in fig. 4, the rotary switch 103 is correspondingly set to 6-th rotation position. Referring to fig. 1, the respective markings of the 6 th rotation position are respectively identified in an indication area 122 provided on the cartridge upper cover 102 around the periphery of the switch hole: 50K Ω, 100K Ω, 200K Ω, 500K Ω, 10M Ω and OFF indicating the resistance values of 5 resistors, respectively. When the rotary switch 103 is rotated to the position corresponding to the mark, the test line connected in series with the resistor having the corresponding resistance value is connected. When the rotating resistance box rotates to an OFF gear, no test circuit is connected, and the rotating resistance box is in an OFF state.

The utility model discloses a rotation type resistance box can be applied to high voltage system's insulation resistance simultaneously and measure and whole car insulation alarm function verification test, can replace traditional universal meter and the application of variable resistance case in the experiment.

Use the utility model discloses a when the insulation resistance of high-voltage system measures under the new energy automobile charged state is measured to rotation type resistance box, will connect and insert the connection port on the box body front side lateral wall with the wire of connecting whole car high-voltage system positive pole and level platform, insert two connecting plug of universal meter respectively and insert the connection port on the box body rear side lateral wall. And adjusting the gear of the rotary switch to 200K omega, switching on a test line connected with a 200K omega resistor in series, and measuring the voltage value of the test line. And then adjusting the gear of the rotary switch to 10M omega, switching on a test line connected with a 10M omega resistor in series, and measuring the voltage value of the test line again. And finally, calculating the insulation resistance value of the high-voltage system of the whole vehicle by a formula.

Use the utility model discloses a rotation type resistance box measures when new energy automobile insulation alarm function verification test, will connect and insert the connection on the box body front side lateral wall to put in order anodal and level platform's of car high-voltage system and insert the connection port, and adjustment rotary switch's gear is to 500K omega, and the test line that has 500K omega resistance concatenates is put through, observes whether new energy automobile instrument shows insulation resistance alarm prompt information. And then adjusting the gear of the rotary switch to 200K omega, connecting a test line serially connected with a 200K omega resistor, and observing whether the new energy automobile instrument displays insulation resistance alarm prompt information or not. And then adjusting the gear of the rotary switch to 100K omega, connecting a test circuit connected with a 100K omega resistor in series, and observing whether the new energy automobile instrument displays insulation resistance alarm prompt information or not. And finally, adjusting the gear of the rotary switch to 50K omega, connecting a test circuit serially connected with a 50K omega resistor, and observing whether the new energy automobile instrument displays the insulation resistance alarm prompt information or not. Whether the new energy automobile insulation alarm system works normally is verified by adjusting the resistance value connected to the high-voltage system for four times.

In summary, the utility model discloses a rotation type resistance box has following advantage:

1) aiming at a specific test scene, two functions of measuring the insulation resistance of the high-voltage system of the new energy automobile, verifying the insulation alarm function and the like can be realized. For the insulation resistance measurement of the high-voltage system, a double-meter method is generally adopted to measure the insulation resistance of the high-voltage system of the new energy automobile in a charged state, namely, a low internal resistance universal meter and a high internal resistance universal meter are respectively used, the low internal resistance universal meters and the high internal resistance universal meters are connected into a high-voltage loop of the new energy automobile to respectively measure the voltages between a positive electrode and a negative electrode and a vehicle electrical platform, and then the insulation resistance value of the high-voltage system is. The method needs two multimeters with different internal resistances, and is complex in operation and high in test cost. The utility model discloses can be through inserting the rated resistance value of adjustment in the new energy automobile high pressure return circuit system, realized that a universal meter can measure the high-voltage system insulation resistance value under the charged state. For the verification test of the insulation alarm function of the whole vehicle, a set of special variable resistance boxes are generally connected in parallel to a high-voltage system, the insulation resistance value between the high-voltage system and a level platform of the whole vehicle is realized by adjusting the resistance value, and the insulation alarm function of the whole vehicle is activated when the insulation resistance value is low to a certain degree. The utility model discloses an insert in the whole car high voltage system and adjust different resistance gears and realize insulating alarming function's verification, reduced test equipment cost and operation complexity.

2) The test equipment is convenient to operate and maintain. Because the utility model discloses to the isolated plant of specific test scene development, only need adjust rotary switch and realize that different resistance realizes, simplified test operation, reduced test cost, improved test efficiency.

The above-described embodiments are provided to enable persons skilled in the art to make or use the invention, and many modifications and variations may be made to the above-described embodiments by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of the invention is not limited by the above-described embodiments, but should be accorded the widest scope consistent with the innovative features set forth in the claims.

Claims

1. A rotary resistor cartridge, comprising:

the box body is provided with a plug port;

the circuit board assembly is arranged in the box body, a plurality of parallel test circuits are arranged on the circuit board assembly, each test circuit is connected with a resistor in series, the resistors connected in series on different test circuits are different in resistance value, and the test circuits are electrically connected with the plug-in ports;

the rotary switch is arranged on the box body, a conductive path is arranged on the rotary switch, the rotary switch rotates, the conductive path is communicated with one of the test circuits, and the resistors connected in series on the test circuits are connected into the circuits connected with the plug ports.

2. The rotary resistor cartridge of claim 1 wherein the circuit board assembly comprises:

the circuit board is provided with a conductive circuit;

the resistors are arranged on the back of the circuit board, and the resistors have different resistance values;

the array of contact terminals are arranged on the front surface of the circuit board;

the conductive circuit forms a plurality of parallel test circuits, each test circuit is connected with a resistor and a group of contact terminals in series, and the group of contact terminals are arranged in a separated mode so that the test circuits are disconnected at the contact terminals;

the conductive circuit also comprises a plug wire, and the plurality of test circuits are connected in parallel and then electrically connected with the plug port through the plug wire.

3. The rotary resistor cartridge of claim 2 wherein the rotary switch comprises:

a turntable;

the rotating handle is arranged on the top surface of the rotating disc;

the conductive path is arranged on the bottom surface of the turntable and comprises two contact heads and a connecting line for connecting the two contact heads, the two contact heads are arranged on the circumference of the turntable, and the two contact heads are located on the same diameter of the turntable.

4. The rotary resistance cartridge as claimed in claim 3, wherein the outer circumference of the bottom surface of the turntable is formed as a raised circular ring, a conductor groove is formed along the diameter direction of the turntable, two bosses are formed at the intersections of both ends of the conductor groove and the circular ring, the contact terminals are disposed on the bosses, and the connection wires are disposed in the conductor groove.

5. The rotary resistor cartridge of claim 3 wherein,

the contact terminals in the plurality of groups are arranged along a circumference, the diameter of the circumference is matched with that of the turntable, and the two contact terminals in the same group are positioned on the same diameter of the circumference;

the rotary switch rotates, two contact heads of the conductive path are respectively contacted with two contact terminals in the same group, and the two contact terminals are communicated through the conductive path, so that a test circuit where the group of connection terminals is located is communicated.

6. The rotary resistance cartridge of claim 1, wherein the cartridge body comprises a cartridge body and a cartridge cover;

the box body is in a cuboid shape with an opening at the top, the circuit board assembly is arranged in the box body, and the side wall of the box body is provided with an inserting port;

the box upper cover is arranged on the box body and closes the opening of the box body, and the rotary switch is arranged on the box upper cover.

7. The rotary resistor box according to claim 6, wherein the upper cover of the box is opened with a circular switch hole, the rotary switch is installed in the switch hole, and an indication area is provided around the outer circumference of the switch hole.

8. The rotary resistor box of claim 6 wherein the circuit board assembly is secured within the box body by screws and the box cover is secured to the box body by screws.

9. The rotary resistor box of claim 1, wherein the circuit board assembly has 5 parallel test circuits, and the resistors connected in series on the 5 test circuits have resistance values of 50K Ω, 100K Ω, 200K Ω, 500K Ω and 10M Ω, respectively.