High-voltage connector and vehicle-mounted charger

Abstract

Disclosed in the present invention are a high-voltage connector and a vehicle-mounted charger. The high-voltage connector comprises: a first housing internally provided with a plurality of insertion pieces, and a second housing internally provided with contact members corresponding to the insertion pieces. A first conductive member is further provided in the first housing, and the first conductive member is connected to a plurality of first thermistors arranged in parallel; a second conductive member is further provided in the second housing, the second conductive member is connected to a plurality of second thermistors arranged in parallel, and the first conductive member is further connected to a control unit; when the first conductive member is connected to the corresponding second conductive member, the first conductive member, the first thermistors, the second conductive member, and the second thermistors form a conductive loop; and the first thermistors and the second thermistors are arranged in parallel. The control unit can detect whether the total resistance value of the first thermistors and the second thermistors arranged in parallel is within a preset interval to determine whether the temperature rise of the high-voltage connector is abnormal, and if yes, cuts off the output voltage, thereby avoiding damage to the high-voltage connector.

Description

A high-voltage connector and on-board charger Technical Field

[0001] The present invention relates to the technical field of electrical components, and in particular to a high-voltage connector and an on-board charger. Background Art

[0002] To ensure that electric vehicles have sufficient power performance, they are equipped with high-voltage systems, which are connected through high-voltage connectors. The voltage of the high-voltage system is usually as high as 300V. According to current market demand, the voltage of the high-voltage system is showing an upward trend. It is worth noting that while high voltage improves the power performance of electric vehicles, it also brings the following safety hazards:

[0003] 1. When hot plugging or unplugging a high-voltage connector, it may generate high-voltage arcs and electric shocks. If the human body comes into contact with these high-voltage arcs, it may cause electrocution or serious electric shock injuries. Hot plugging or unplugging may also damage the high-voltage connector, thereby affecting its performance and lifespan.

[0004] 2. High-voltage connectors are prone to excessive temperature rise under certain abnormal circumstances. Disconnecting the connector manually is extremely dangerous. Furthermore, users may not be able to detect abnormal temperature rises in time, and long-term high-temperature conditions pose a risk of damage to connector components, which can even cause fires. Current solutions include increasing the heat resistance of various component materials, but these efforts have had limited success and do not allow for temperature monitoring of high-voltage connectors.

[0005] Therefore, there is an urgent need for a high-voltage connector that can solve the above problems at the same time. Summary of the Invention

[0006] In view of this, the present invention provides a high-voltage connector and an on-board charger, which are used to solve the problem that the high-voltage connector in the prior art cannot solve the problem of temperature rise monitoring.

[0007] To achieve one, part, or all of the above objectives or other objectives, the technical solution of the present invention is a high-voltage connector, comprising a first housing and a second housing;

[0008] The first housing is provided with a plurality of inserts, and the second housing is provided with contact members corresponding to the inserts; the first housing is also provided with a first conductive member, connected to a plurality of first thermistors arranged in parallel; the second housing is also provided with a second conductive member, connected to a plurality of second thermistors arranged in parallel, the second conductive member corresponding to the first conductive member, and the first conductive member is also connected to a control unit;

[0009] When the first conductive member is engaged with the second conductive member, the first conductive member, the first thermistor, the second conductive member and the second thermistor form a conductive loop; the first thermistor and the second thermistor are arranged in parallel;

[0010] The control unit is used to detect the electrical parameters of the conductive circuit; the control unit is also used to determine that the temperature rise of the high-voltage connector is abnormal when the electrical parameters are not within a preset range, and cut off the output voltage of the high-voltage connector.

[0011] Furthermore, the electrical parameter is a total resistance Rn of the first thermistor and the second thermistor in the conductive loop connected in parallel, and the calculation formula of Rn is:

[0012] 1 / Rn=1 / R1+···+1 / Rm (m≥2).

[0013] Furthermore, the first conductive member is provided with two first thermistors in parallel; the second conductive member is provided with two second thermistors in parallel;

[0014] The total resistance Rn of the two first thermistors and the two second thermistors connected in parallel is calculated as follows:

[0015] 1 / Rn=1 / R1+1 / R2+1 / R3+1 / R4;

[0016] R1 and R2 are the resistance values ​​of two first thermistors, and R3 and R4 are the resistance values ​​of two second thermistors.

[0017] Furthermore, there are four inserts;

[0018] Two inserting pieces are provided at intervals along the vertical direction on both sides of the first shell.

[0019] Furthermore, the length of the first conductive member is shorter than the length of the insert and / or the length of the second conductive member is shorter than the length of the contact member.

[0020] Furthermore, the first shell is provided with a planar portion;

[0021] One end of each of the inserts away from the contact piece extends out of the plane portion to form a first contact point, and the first contact point is used to connect to a load;

[0022] One end of the first conductive member away from the second conductive member extends out of the plane portion to form a second contact point, and the second contact point is used to connect to a control unit.

[0023] Furthermore, the outer wall of the first shell is provided with a buckle, and the outer wall of the second shell is provided with a slot corresponding to the buckle;

[0024] The second conductive member is provided with a connecting member at one end thereof facing the first conductive member;

[0025] When the first shell is inserted into the second shell, the buckle is engaged with the corresponding slot, the insert is detachably inserted into the corresponding contact member, and the first conductive member is connected to the second conductive member by being detachably inserted into the connecting member.

[0026] Furthermore, the first thermistor is any one of an NTC resistor and a PTC resistor.

[0027] Furthermore, the second thermistor is any one of an NTC resistor and a PTC resistor.

[0028] A vehicle-mounted charger uses the high-voltage connector described above as a high-voltage power supply device.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] When the high-voltage connector of the present invention is connected to a load with a control unit, the control unit can monitor whether the total resistance of the first and second thermistors connected in parallel is within a preset range, and then determine whether the temperature rise of the high-voltage connector is abnormal. If the total resistance of the first and second thermistors connected in parallel is not within the preset range, it is determined that the temperature rise of the high-voltage connector is abnormal, and the control unit directly cuts off the output voltage of the high-voltage connector, causing the high-voltage connector to stop working, thereby avoiding damage to the high-voltage connector and preventing the high-voltage connector from being plugged in while powered on. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of the present invention and the accompanying drawings are used to distinguish different objects, not to describe a specific order.

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] FIG1 is an exploded schematic diagram of a high-voltage connector of the present invention;

[0034] FIG2 is an enlarged schematic diagram of the reference numeral A in FIG1 ;

[0035] FIG3 is a cross-sectional view of a high-voltage connector of the present invention;

[0036] FIG4 is a schematic structural diagram of a high-voltage connector according to the present invention;

[0037] FIG5 is a circuit diagram of a conductive loop in one embodiment of the present invention;

[0038] FIG6 is a circuit diagram of a conductive loop in another embodiment of the present invention;

[0039] FIG7 is a control flow chart of the present invention.

[0040] Reference numerals:

[0041] 10. First shell;

[0042] 11. Insert; 111. First contact;

[0043] 12. First conductive member; 121. Second contact point;

[0044] 13. First thermistor;

[0045] 14. Plane portion; 141. First through hole; 142. Second through hole;

[0046] 15. Buckle;

[0047] 20. Second shell;

[0048] 21. Contact member; 211. Abutment member;

[0049] 22. Second conductive member; 221. Connecting member;

[0050] 23. Second thermistor;

[0051] 24. Card slot;

[0052] 30. Cables. DETAILED DESCRIPTION

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting. In addition, "several" in the present invention refers to "one or more".

[0054] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0055] In one embodiment, referring to FIG. 1-2 and FIG. 7 , the present invention provides a high-voltage connector, including a first housing 10 and a second housing 20 .

[0056] A plurality of inserts 11 are provided in the first shell 10, and contacts 21 corresponding to the inserts 11 are provided in the second shell 20; wherein, two inserts 11 are provided at intervals along the vertical direction on both sides of the first shell 10, and two contacts 21 are provided at intervals along the vertical direction on both sides of the corresponding inserts 11 in the second shell 20. A first conductive member 12 is further provided in the first shell 10, and the first conductive member 12 is connected to a plurality of first thermistors 13 arranged in parallel; a second conductive member 22 is further provided in the second shell 20, and the second conductive member 22 is connected to a plurality of second thermistors 23 arranged in parallel. Each first thermistor 13 and each second thermistor 23 preferably has a resistance variation range of 1.135KΩ-1600KΩ. The second conductive member 22 corresponds to the first conductive member 12. When the first shell 10 and the second shell 20 are engaged, the insert 11 is engaged with the contact member 21, and the insert 11 and the contact member 21 form a high-voltage circuit; the first conductive member 12 is engaged with the second conductive member 22, and the first conductive member 12, the first thermistor 13, the second conductive member 22 and the second thermistor 23 form a conductive circuit; the first conductive member 12 is engaged with the second conductive member 22, and the first thermistor 13 and the second thermistor 23 are arranged in parallel.

[0057] In addition, the length of the first conductive member 12 is less than that of the insert 11, and / or the length of the second conductive member 22 is less than that of the contact 21. Thus, when the first housing 10 and the second housing 20 are joined, the insert 11 and the contact 21 are connected before the first conductive member 12 and the second conductive member 22 are connected. The control unit connects the high-voltage circuit output voltage after the first conductive member 12 and the second conductive member 22 are connected. This ensures that the output voltage is turned on only after the insert 11 and the contact 21 are stably connected, thereby improving electrical safety. When the first housing 10 and the second housing 20 are separated, the first conductive member 12 and the second conductive member 22 separate before the insert 11 and the contact 21 separate. The control unit disconnects the high-voltage circuit output voltage after the first conductive member 12 and the second conductive member 22 separate. This ensures that the output voltage is disconnected after the insert 11 and the contact 21 are separated, thereby improving electrical safety. The end of the contact 21, away from the insert 11, is used to connect to a cable 30, which is used to connect to an external power source. Under normal use, the temperature range of the environment in which the high-voltage connector is located is preferably -40°C to 140°C.

[0058] The first conductive member 12 is also connected to a control unit. Specifically, the first housing 10 has a planar portion 14. The end of each insert 11, distal from the contact member 21, extends from the planar portion 14 to form a first contact 111 for connecting to a load. The end of the first conductive member 12, distal from the second conductive member 22, extends from the planar portion 14 to form a second contact 121 for connecting to the control unit. This control unit controls the load connected to the first conductive member 12. The control unit includes an electrical parameter monitoring chip with preset ranges programmed into it. This chip may be an ACS712, ACS758, TLI4970, INA210, LEM LAH series, or other chip with on / off functionality. The control unit is configured to detect the electrical parameters of the conductive circuit. If the electrical parameters are outside the preset range, the control unit is configured to determine that the high-voltage connector has an abnormal temperature rise and to disconnect the output voltage of the high-voltage connector (i.e., disconnect the output voltage of the high-voltage circuit).

[0059] Specifically, the control flow of the control unit is shown in FIG7 :

[0060] Step 1: Detect the electrical parameters of the conductive circuit;

[0061] Step 2: Determine whether the electrical parameter is within a preset range; if the electrical parameter is within the preset range, determine that the temperature rise of the high-voltage connector is normal, and execute step 301; if the electrical parameter is not within the preset range, determine that the temperature rise of the high-voltage connector is abnormal, and execute step 302;

[0062] Step 301: The high-voltage connector operates normally, maintaining normal voltage output of the high-voltage circuit; and skipping to step 1.

[0063] Step 302: Cut off the voltage output of the high-voltage circuit, and the high-voltage connector stops working.

[0064] The electrical parameter is preferably the total resistance Rn of the conductive circuit, 1 / Rn=1 / R1+···+1 / Rm (m≥2), where R1-Rm are both thermistors on the conductive circuit; the preset interval corresponds to the interval of electrical parameters corresponding to the high-voltage connector when operating under normal temperature rise conditions.

[0065] Since a thermistor is connected in parallel to the conductive circuit in the high-voltage connector, the temperature of the high-voltage connector can affect the electrical parameters of the conductive circuit (the affected electrical parameters include but are not limited to the total resistance, current and voltage). That is, the electrical parameters of the conductive circuit reflect the temperature rise of the high-voltage connector. Based on this, this solution realizes temperature rise monitoring of the high-voltage connector and immediately cuts off the voltage output of the high-voltage connector in the event of abnormal temperature rise. This can not only avoid continuous abnormal temperature rise, but also avoid hot plugging and unplugging of the high-voltage connector.

[0066] In one embodiment, a connection anomaly in the high-voltage connector includes: a problem (e.g., deformation or bending) with at least one of the insert 11, first conductive member 12, and first thermistor 13 within the first housing 10; and / or a problem (e.g., deformation or bending) with at least one of the contact member 21, second conductive member 22, and second thermistor 23 within the second housing 20. These connection anomalies can cause an abnormal temperature rise within the high-voltage connector.

[0067] Because the total resistance Rn of the first and second thermistors 13 and 23 connected in parallel in the conductive circuit varies with the temperature within the high-voltage connector, when the aforementioned connection anomaly occurs, the abnormal temperature rise within the high-voltage connector will cause the electrical parameters of the conductive circuit (preferably the total resistance Rn of the first and second thermistors 13 and 23 connected in parallel in the conductive circuit, the same applies hereinafter) to fall outside the preset range. At this point, the electrical parameter monitoring chip detects the electrical parameters of the conductive circuit and determines that they are outside the preset range, thus determining that the high-voltage connector is operating abnormally. The chip then directly cuts off the voltage output, causing the high-voltage connector to cease operation, preventing damage to the connector and preventing subsequent maintenance personnel from unplugging the high-voltage connector while it is powered on.

[0068] In one embodiment, referring to FIG1 and FIG5 , the first thermistor 13 specifically includes R1 and R2; the second thermistor 23 specifically includes R3 and R4. The total resistance of the conductive loop is Rn, and the calculation formula of Rn is:

[0069] 1 / Rn=1 / R1+1 / R2+1 / R3+1 / R4.

[0070] In one embodiment, the number of thermistors included in the first thermistor 13 is the same as the number of thermistors included in the second thermistor 23. Preferably, as shown in FIG6 , the first thermistor 13 includes only one thermistor R5, and the second thermistor 23 also includes only one thermistor R6.

[0071] In one embodiment (not shown in the figures), the number of thermistors included in the first thermistor 13 is different from the number of thermistors included in the second thermistor 23 .

[0072] In one embodiment, referring to Figures 1 and 3, the outer wall of the first shell 10 is provided with a snap 15, and the outer wall of the second shell 20 is provided with a slot 24 corresponding to the snap 15; the second conductive member 22 is provided with a connecting member 221 at one end facing the first conductive member 12.

[0073] When the first shell 10 is inserted into the second shell 20 , the buckle 15 is engaged with the corresponding slot 24 , the insert 11 is detachably inserted into the corresponding contact member 21 , and the first conductive member 12 is connected to the second conductive member 22 by being detachably inserted into the connecting member 221 .

[0074] Among them, the connecting member 221 is a hollow insulating sleeve, and the establishment of the connecting member 221 can limit the connection between the first conductive member 12 and the second conductive member 22, ensure the reliable connection between the first conductive member 12 and the second conductive member 22, and prevent the first conductive member 12 and the second conductive member 22 from having poor contact.

[0075] An abutment piece 211 made of a conductive material is provided at one end of the contact 21 facing the insert 11 . The insert 11 can be detachably inserted into the corresponding abutment piece 211 and connected to the contact 21 .

[0076] In other embodiments (not shown in the figures), the first shell 10 and the second shell 20 can also be integrally formed.

[0077] In one embodiment, the first thermistor 13 is either an NTC resistor or a PTC resistor. The second thermistor 23 is either an NTC resistor or a PTC resistor. When the high-voltage connector is properly assembled and used, the electrical parameter monitoring chip, the first conductive member 12, and the second conductive member 22 in the load form a conductive loop, and the thermistors R1, R2, R3, and R4 are arranged in parallel. The total resistance of the conductive loop is Rn, which is calculated as follows: 1 / Rn = 1 / R1 + 1 / R2 + 1 / R3 + 1 / R4. The electrical parameter monitoring chip determines whether the high-voltage connector is abnormal by determining whether the total resistance Rn of the conductive loop is within a preset range (preferably 0.28375 kΩ to 400 kΩ, corresponding to a temperature range of -40°C to 140°C inside the high-voltage connector).

[0078] Preferably, referring to FIG. 5 , when thermistor R1, thermistor R2, thermistor R3 and thermistor R4 are all PTC resistors:

[0079] When the high-voltage connector is in an environment of -40°C to 140°C, the high-voltage connector can be used normally, and at this time, the preset range of the total resistance Rn of the conductive circuit is 0.28375KΩ to 400KΩ.

[0080] If the high-voltage connector is in an abnormal state, the temperature of the high-voltage connector itself will continue to rise. Once the temperature of the high-voltage connector itself rises to above 140°C, the total resistance Rn of the conductive circuit will be greater than 400KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn of the conductive circuit is greater than 400KΩ, it will cut off the connection circuit between the load and the high-voltage connector, causing the high-voltage connector to stop working. As a result, the temperature of the high-voltage connector will no longer rise, avoiding damage to the high-voltage connector. In this way, subsequent maintenance personnel can avoid the situation of hot plugging and unplugging the high-voltage connector when performing maintenance.

[0081] If the high-voltage connector is connected to a load in a low-temperature environment, where the temperature is below -40°C, the temperature of the high-voltage connector itself will drop below -40°C due to external temperature factors, causing the total resistance Rn of the conductive circuit to be less than 0.28375KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn of the conductive circuit is less than 0.28375KΩ, it will cut off the connection circuit between the load and the high-voltage connector, causing the high-voltage connector to stop working. The high-voltage connector will not function normally until the user raises the temperature of the environment in which the high-voltage connector is located to above -40°C through other means.

[0082] Preferably, when the thermistor R1, thermistor R2, thermistor R3 and thermistor R4 are all PTC resistors and all NTC resistors:

[0083] When the high-voltage connector is in an environment of -40°C to 140°C, the high-voltage connector can be used normally, and at this time, the preset range of the total resistance Rn of the conductive circuit is 0.28375KΩ to 400KΩ.

[0084] If the high-voltage connector is in an abnormal state, the temperature of the high-voltage connector itself will continue to rise. Once the temperature of the high-voltage connector itself rises to above 140°C, the total resistance Rn of the conductive circuit will be less than 0.28375KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn of the conductive circuit is less than 0.28375KΩ, it will cut off the connection circuit between the load and the high-voltage connector, causing the high-voltage connector to stop working. As a result, the temperature of the high-voltage connector will no longer rise, avoiding damage to the high-voltage connector. In this way, subsequent maintenance personnel can avoid the situation of hot plugging and unplugging the high-voltage connector when performing maintenance.

[0085] If the high-voltage connector is connected to a load in a low-temperature environment, where the temperature is below -40°C, the temperature of the high-voltage connector itself will drop below -40°C due to external temperature factors, causing the total resistance Rn of the conductive circuit to exceed 400KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn of the conductive circuit is greater than 400KΩ, it will cut off the connection circuit between the load and the high-voltage connector, causing the high-voltage connector to stop working. The high-voltage connector will not function normally until the user uses other means to raise the temperature of the environment in which the high-voltage connector is located to above -40°C.

[0086] In other embodiments, referring to FIG. 6 , the first thermistor 13 is the thermistor R5 , the second thermistor 23 is the thermistor R6 , and both the thermistor R5 and the thermistor R6 are PTC resistors.

[0087] When the high-voltage connector is correctly assembled and used, the electrical parameter monitoring chip in the load and the first conductive member 12 and the second conductive member 22 form a conductive loop, and the thermistor R5 and the thermistor R6 are arranged in parallel, resulting in a total resistance of the conductive loop of Rn', which is calculated as 1 / Rn'=1 / R5+1 / R6.

[0088] In this way, the electrical parameter monitoring chip can determine whether the high-voltage connector is abnormal by checking whether the total resistance Rn' of the conductive circuit is within a preset range (the preset range is 0.5675KΩ-800KΩ at this time, and the temperature range corresponding to the preset range is -40℃-140℃).

[0089] Determine if the high voltage connector is abnormal:

[0090] If the high-voltage connector is in an abnormal state, the temperature of the high-voltage connector itself will continue to rise. Once the temperature of the high-voltage connector itself rises to above 140°C, the total resistance Rn' of the conductive circuit will be greater than 800KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn' of the conductive circuit is greater than 800KΩ, it will cut off the circuit, so that the high-voltage connector will no longer supply power to the load, causing the high-voltage connector to stop working. As a result, the temperature of the high-voltage connector will no longer rise, avoiding damage to the high-voltage connector. In this way, subsequent maintenance personnel can avoid the situation of hot plugging and unplugging the high-voltage connector during maintenance.

[0091] If the high-voltage connector is connected to a load in a low-temperature environment, where the temperature is below -40°C, the temperature of the high-voltage connector itself will drop below -40°C due to external temperature factors, causing the total resistance Rn' of the conductive circuit to be less than 0.5675KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn' of the conductive circuit is less than 0.5675KΩ, it will cut off the connection between the load and the high-voltage connector, causing the high-voltage connector to stop working. The high-voltage connector will not function normally until the user raises the temperature of the environment in which the high-voltage connector is located to above -40°C through other means.

[0092] When thermistor R5 and thermistor R6 are both NTC resistors, the abnormality of the high-voltage connector is determined as follows:

[0093] If the high-voltage connector is in an abnormal state, the temperature of the high-voltage connector itself will continue to rise. Once the temperature of the high-voltage connector itself rises to above 140°C, the total resistance Rn' of the conductive circuit will be less than 0.5675KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn' of the conductive circuit is less than 0.5675KΩ, it will cut off the circuit, so that the high-voltage connector will no longer supply power to the load, causing the high-voltage connector to stop working. As a result, the temperature of the high-voltage connector will no longer rise, avoiding damage to the high-voltage connector. In this way, subsequent maintenance personnel can avoid the situation of hot plugging and unplugging the high-voltage connector when performing maintenance.

[0094] If the high-voltage connector is connected to a load in a low-temperature environment, where the temperature is below -40°C, the high-voltage connector itself will fall below -40°C due to external temperature factors, causing the total resistance Rn' of the conductive circuit to exceed 800KΩ. When the load's electrical parameter monitoring chip detects that the total resistance Rn' of the conductive circuit is greater than 800KΩ, it will cut off the circuit and stop the high-voltage connector from working. The high-voltage connector will not function normally until the user uses other means to raise the temperature of the environment in which the high-voltage connector is located to above -40°C.

[0095] In one embodiment, referring to Figures 1-2 , there are four inserting pieces 11 ; two inserting pieces 11 are provided at intervals along the vertical direction on both sides of the first shell 10 .

[0096] Two contacts 21 are also provided at intervals along the vertical direction on both sides of the second housing 20, so that each contact 21 can be connected to a corresponding plug 11. In this way, the connection of the high-voltage circuit can be achieved.

[0097] In one embodiment, the length of the first conductive member 12 is less than the length of the insert 11, and / or the length of the second conductive member 22 is less than the length of the contact 21. This ensures that when the first housing 10 and the second housing 20 are connected, the first and second conductive members 12, 22 are connected after the insert 11 and the contact 21. This ensures that the first and second conductive members 12, 22 are connected to form a conductive circuit only after the insert 11 and the contact 21 are securely connected (i.e., after the insert 11 and the contact 21 form a high-voltage circuit), and the output voltage of the high-voltage circuit is connected via the control unit. Furthermore, the first and second conductive members 12, 22 are disconnected before the insert 11 and the contact 21. In this way, the control unit can interrupt the voltage output of the high-voltage circuit after the first and second conductive members 12, 22 are disconnected but before the insert 11 and the contact 21 are disconnected, thereby avoiding the dangerous situation of hot plugging and unplugging the high-voltage connector.

[0098] In one embodiment, referring to Figures 1 and 4, the first shell 10 is provided with a planar portion 14; one end of each of the inserts 11 away from the contact member 21 extends out of the planar portion 14 to form a first contact 111, which is used to connect to a load and supply power to it.

[0099] One end of the first conductive member 12 away from the second conductive member 22 extends out of the planar portion 14 to form a second contact 121 . The second contact 121 is used to connect to a control unit in a load.

[0100] The planar portion 14 facilitates stable connection with a load having an electrical parameter monitoring chip.

[0101] The planar portion 14 is square in shape, with a first through hole 141 defined at each corner. The first contact 111 extends out of the planar portion 14 through the first through hole 141. Two second through holes 142 are symmetrically defined in the middle of the planar portion 14. The second contact 121 extends out of the planar portion 14 through the second through holes 142.

[0102] In one embodiment, the insert 11 , the contact member 21 , the first conductive member 12 , and the second conductive member 22 are all made of conductive materials.

[0103] In one embodiment, the first housing 10 and the second housing 20 are both made of insulating materials, so as to reduce the risk of electric shock when a worker removes a high-voltage connector in operation.

[0104] The present invention also provides an on-board charger, which uses the high-voltage connector described above as a high-voltage power supply device.

[0105] Among them, the control unit is integrated into the on-board charger.

[0106] In one embodiment, a usage process of the high-voltage connector of the present invention is provided:

[0107] First, correctly assemble the high-voltage connector. Then, connect the high-voltage connector to a load equipped with an electrical parameter monitoring chip and supply power. If the electrical parameter monitoring chip detects that the total resistance of the parallel-connected first and second thermistors 13 and 23 is outside a preset range, it determines that the high-voltage connector is abnormal and directly cuts off the output voltage of the high-voltage circuit.

[0108] After the staff discovered the abnormal high-voltage connector, they used detection tools to detect the location of the abnormality in the high-voltage connector, and then performed corresponding repairs based on the corresponding abnormal situation. After the repair, the high-voltage connector can be used normally again.

[0109] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A high voltage connector, characterized in that: It comprises a first shell (10) and a second shell (20); A plurality of plug-ins (11) are provided in the first shell (10), and a contact piece (21) corresponding to the plug-ins (11) is provided in the second shell (20); a first conductive piece (12) is also provided in the first shell (10), and the first conductive piece (12) is connected to a plurality of first thermistors (13) arranged in parallel; a second conductive piece (22) is also provided in the second shell (20), and the second conductive piece (22) is connected to a plurality of second thermistors (23) arranged in parallel, and the second conductive piece (22) corresponds to the first conductive piece (12), and the first conductive piece (12) is also connected to a control unit; When the first conductive member (12) is joined to the second conductive member (22), the first conductive member (12), the first thermistor (13), the second conductive member (22) and the second thermistor (23) form a conductive loop; the first thermistor (13) and the second thermistor (23) are arranged in parallel; The control unit is used to detect the electrical parameters of the conductive circuit; the control unit is also used to determine that the temperature rise of the high-voltage connector is abnormal and cut off the output voltage of the high-voltage connector when the electrical parameters are not within a preset range.

2. The high voltage connector according to claim 1, characterized in that: The electrical parameter is the total resistance Rn of the first thermistor (13) and the second thermistor (23) in the conductive loop connected in parallel, and the calculation formula of Rn is: 1 / Rn=1 / R1+···+1 / Rm (m≥2).

3. The high voltage connector according to claim 2, characterized in that: The first conductive member (12) is provided with two first thermistors (13) in parallel; the second conductive member (22) is provided with two second thermistors (23) in parallel; The total resistance of the two first thermistors (13) and the two second thermistors (23) connected in parallel is Rn, and the calculation formula of Rn is: 1 / Rn=1 / R1+1 / R2+1 / R3+1 / R4; Wherein, R1 and R2 are respectively the resistance values ​​of two first thermistors (13), and R3 and R4 are respectively the resistance values ​​of two second thermistors (23).

4. The high voltage connector according to claim 1, characterized in that: There are four inserts (11); Two inserting pieces (11) are respectively arranged at intervals along the vertical direction on both sides of the first shell (10).

5. The high voltage connector according to claim 1, characterized in that: The length of the first conductive member (12) is smaller than the length of the insert (11) and / or the length of the second conductive member (22) is smaller than the length of the contact member (21).

6. The high voltage connector according to claim 1, characterized in that: The first shell (10) is provided with a planar portion (14); One end of each of the inserts (11) away from the contact piece (21) extends out of the plane portion (14) to form a first contact point (111), and the first contact point (111) is used to connect a load; One end of the first conductive member (12) away from the second conductive member (22) extends out of the plane portion (14) to form a second contact point (121), and the second contact point (121) is used to connect to a control unit.

7. The high voltage connector according to claim 1, characterized in that: The outer wall of the first shell (10) is provided with a buckle (15), and the outer wall of the second shell (20) is provided with a slot (24) corresponding to the buckle (15); One end of the second conductive member (22) facing the first conductive member (12) is provided with a connecting member (221); When the first shell (10) is inserted into the second shell (20), the buckle (15) is engaged with the corresponding slot (24), the insert piece (11) is detachably inserted into the corresponding contact piece (21), and the first conductive piece (12) is connected to the second conductive piece (22) by being detachably inserted into the connecting piece (221).

8. The high voltage connector according to any one of claims 1 to 7, characterized in that: The first thermistor (13) is any one of an NTC resistor and a PTC resistor.

9. The high voltage connector according to any one of claims 1 to 7, characterized in that: The second thermistor (23) is any one of an NTC resistor and a PTC resistor.

10. A vehicle charger, characterized in that: The on-board charger uses the high-voltage connector described in any one of claims 1 to 9 as a high-voltage power supply device.

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