Testing system capable of meeting hot plug of connector under large-voltage and large-current conditions
By constructing a test system for high-voltage power battery packs, low-voltage high-current power supplies, and power resistors, and combining it with Hall effect sensors to monitor current, the high cost and energy waste of connector hot-plug testing under high voltage and high current conditions were solved, achieving low-cost and high-efficiency testing results.
Patent Information
- Application Number
- CN202422840293.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Existing technologies for connector hot-plug testing under high voltage and high current conditions are expensive and bulky, and they also waste a lot of electrical energy during the testing process, making it difficult to achieve efficient and low-cost testing.
The test system consists of a high-voltage power battery pack, a low-voltage high-current power supply, a low-voltage high-current electronic load, and a power resistor. It achieves hot-plug testing of connectors through switch control, monitors current using Hall sensors, and optimizes voltage and current parameters in conjunction with a battery management system.
It enables low-cost, simple-structure connector hot-plug testing, reducing testing costs and difficulty, and improving testing efficiency and environmental friendliness.
Smart Images
Figure CN223471141U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the test technical field, especially relate to a kind of test system of connector hot plug under the condition of meeting large voltage, large current. BACKGROUND
[0002] The live hot plug test of connector is one of the basic test items of connector, and when the connector needs to be used in data center, charging pile and other scenarios requiring live connection module, live hot plug is one of the necessary test items of connector. With the increasing power of electrical equipment, the current flowing through the connector is also increasing, and the voltage applied to the two ends of the connector when the connector is disconnected is also increasing. In GBT 20234.1-2023, the recommended charging voltage has reached 1500VDC, and the maximum charging current has reached 1000A, and the maximum charging power is 800KW.
[0003] If the open circuit voltage is 1500VDC and the short circuit current is 1000A, the live hot plug test of the connector requires a 1500KW power supply and a 1500KW electronic load. Such equipment is very expensive and bulky, which makes the test cost high. Due to the large size of the test equipment, the test is also very inconvenient.
[0004] In actual testing, when the connector is open, the current in the circuit is zero, and the output power of the power supply is zero. When the connector is in the connected state, although the output power of the power supply is as high as 1500KW, the contact resistance of the connector is very small, generally in the order of milliohm or even smaller. Although the current flowing through the connector is large, the voltage applied to the two ends of the connector is small, and the power consumed by the connector is also small, generally in the order of tens to hundreds of watts. The power output by the power supply is mostly consumed by the electronic load, which does not contribute to the test and wastes electricity. UTILITY MODEL CONTENTS
[0005] The utility model aims to provide a test system of connector hot plug under the condition of meeting large voltage, large current, which is simple in structure, low in cost, easy to operate and more power-saving.
[0006] The technical scheme provided by the utility model is as follows:
[0007] The measured connector;
[0008] The high-voltage power battery pack is connected to the measured connector through the first switch at one end;
[0009] The low-voltage high-current power supply is connected to the other end of the high-voltage power battery pack at one end, and connected to the measured connector through the second switch at the other end;
[0010] A low-voltage large-current electronic load is connected in series between the low-voltage large-current power supply and the measured connector, and the low-voltage large-current electronic load is connected with the measured connector through a third switch.
[0011] The first switch and the second switch are connected at the same end of the measured connector, and the third switch is connected at the other end of the measured connector.
[0012] A power resistor is connected between the third switch and the measured connector at one end, and connected between the high-voltage power battery pack and the low-voltage large-current power supply at the other end.
[0013] Preferably, the high-voltage power battery pack is 37.5KWH.
[0014] Preferably, the high-voltage power battery pack is externally connected with a battery management system.
[0015] Preferably, the first switch, the second switch, and the third switch are all large-power IGBT modules.
[0016] Preferably, the first switch, the second switch, and the third switch are respectively connected with a first diode, a second diode, and a third diode at the end close to the measured connector.
[0017] Preferably, the power of the power resistor is 40KW.
[0018] One end of the measured connector is connected with a Hall sensor.
[0019] Preferably, the Hall sensor is externally connected with a circuit control system.
[0020] The beneficial effects of the utility model are:
[0021] The utility model discloses a kind of test systems that can satisfy connector hot plug under the condition of large voltage, large current, simple structure, low cost, easy operation, more power saving. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 A kind of circuit structure schematic diagram of the utility model described can satisfy connector hot plug under the condition of large voltage, large current. DETAILED DESCRIPTION
[0023] The utility model is further described in detail in conjunction with drawings, so that the person skilled in the art can implement according to the description text.
[0024] As Figure 1The utility model provides a kind of test system of connector hot plug under the condition of meeting high voltage, large current, comprising: measured connector;High-voltage power battery pack, one end is connected with the measured connector through first switch;Low-voltage large current power supply, one end is connected with the other end of the high-voltage power battery pack, the other end is connected with measured connector through second switch;Low-voltage large current electronic load, it is connected between the low-voltage large current power supply and the measured connector in series, the low-voltage large current electronic load is connected with the measured connector through third switch;Wherein, the first switch and the second switch are connected in the same end of the measured connector, the third switch is connected in the other end of the measured connector;Power resistance, one end is connected between the third switch and the measured connector, the other end is connected in high-voltage power battery pack and low-voltage large current power supply connection one end.
[0025] As Figure 1As shown, when the test starts, the connector under test is in the closed state, switches K2 and K3 are closed, and switch K1 is open, and the low-voltage and high-current power supply and the low-voltage and high-current electronic load circuit provide the working current required by the test to the connector. When the connector under test starts to change from the closed state to the open state, switches K2 and K3 are open, switch K1 is closed, the high-voltage power battery pack and the current-limiting power resistor R1 circuit are turned on, and the high-voltage stress and the large current stress required by the test are applied to the connector in the open instant and after the connector is opened. The power resistor R1 limits the maximum current discharged by the battery pack to the rated current of the connector under test. After the connector is completely opened, the high-voltage power battery pack no longer outputs current, and the output power is zero. When the connector under test completes the opening stroke and enters the closing stroke, the two ends of the connector are about to be in contact, the high-voltage power battery pack and the current-limiting power resistor R1 circuit apply the high-voltage stress and the large current stress required by the test to the connector in the closing instant and after the connector is closed. When the two ends of the connector under test are in stable contact, the current in the monitoring circuit is monitored through the Hall sensor connected in series with the connector. When the current is stable at the working current of the connector under test (the stable time can be determined according to the specific test parameters, and is generally about 200 ms), or the connector has run to the completely closed position, switches K2 and K3 are closed, and switch K1 is open. The low-voltage and high-current power supply and the low-voltage and high-current electronic load provide the large current stress required by the test to the connector under test. Thus, one test cycle is completed. The time from the completely open state to the completely closed state of the connector or from the completely closed state to the completely open state is 4 seconds, and the insertion and extraction speed is 0.8 m / s. The time during which the high-voltage power battery pack and the current-limiting power resistor R1 circuit are turned on is not more than 0.2 seconds in one "plug or connector insertion and extraction from the socket or appliance input socket" stroke, and the time during which the circuit is turned on per minute is 1.5 seconds. If the working voltage is 1500V, the working current is 1000A, and the high-power hot plug test is performed a general number of times, which is not more than 500, only 37.5 KWH of the battery pack is required to meet the test, and the power of the power resistor R1 is only 40KW.
[0026] The series and parallel connection inside the battery pack can be managed through the battery management system, so as to adjust the working voltage and working current of the high-voltage power battery pack and adapt to different voltage and current parameters of the connector under test.
[0027] The utility model discloses a kind of test systems of connector hot plug under the condition of large voltage, large current, simple structure, low cost, more safe and environmental protection, so that test cost and test difficulty are greatly reduced.
[0028] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.
Claims
1. A test system capable of satisfying the hot plug of a connector under a large voltage and a large current condition, characterized by, The utility model relates to a high-voltage power battery pack test system, including: a measured connector; a high-voltage power battery pack, one end of which is connected with the measured connector through a first switch; a low-voltage large-current power supply, one end of which is connected with the other end of the high-voltage power battery pack, and the other end of which is connected with the measured connector through a second switch; a low-voltage large-current electronic load, which is connected in series between the low-voltage large-current power supply and the measured connector, and is connected with the measured connector through a third switch; wherein the first switch and the second switch are connected at the same end of the measured connector, and the third switch is connected at the other end of the measured connector; a power resistor, one end of which is connected between the third switch and the measured connector, and the other end of which is connected at the end where the high-voltage power battery pack is connected with the low-voltage large-current power supply.
2. The test system capable of satisfying the connector hot plug under the condition of high voltage and high current according to claim 1, wherein, The high-voltage power battery pack is 37.5KWH.
3. The test system capable of meeting the connector hot plug under high voltage and high current conditions according to claim 1 or 2, characterized in that, The high-voltage power battery pack is externally connected with a battery management system.
4. The test system capable of satisfying the connector hot plug under the condition of high voltage and high current of claim 1, wherein, The first switch, the second switch and the third switch all use high-power IGBT modules.
5. The test system capable of meeting the connector hot plug condition under high voltage and high current according to claim 1 or 4, characterized in that, The first switch, the second switch and the third switch are respectively connected with a first diode, a second diode and a third diode at the end close to the measured connector.
6. The test system capable of satisfying the connector hot plug under the condition of high voltage and high current of claim 1, wherein, The power of the power resistor is 40KW.
7. The test system capable of meeting the connector hot plug condition under high voltage and high current according to claim 1, wherein, One end of the measured connector is connected with a Hall sensor.
8. The test system capable of meeting the connector hot plug condition under a large voltage and a large current according to claim 7, wherein, The Hall sensor is externally connected with a circuit control system.