Junction box and vehicle

Abstract

The utility model provides a junction box and a vehicle, and the junction box comprises a power positive electrode interface, a power negative electrode interface, a first switch, a second switch, a first interface, a second interface, a third interface, a fourth interface, and a control interface. The power supply anode interface is connected with the first end of the first switch and the first end of the second switch, the second end of the first switch is connected with the first interface, the second end of the second switch is connected with the third interface, and the first end of the power supply cathode interface is connected with the second interface and the fourth interface. Loads are connected between the first interface and the second interface and between the third interface and the fourth interface, a power source is connected between the power source positive electrode interface and the power source negative electrode interface, the control interface is connected into a controller, and the controller is used for controlling the first switch and the second switch. The types of the electronic devices in the junction box are few, the connection relation is simple, so that the circuit structure is simple, and the whole control response time is short due to the fact that the number of the electronic devices involved in the control process is small.

Description

Technical Field

[0001] The utility model relates to the technical field of junction boxes, in particular to a junction box and a vehicle. Background Art

[0002] Junction boxes are often used in power systems. They are a type of equipment used for power control and power distribution. The role of junction boxes in power systems is usually to distribute the current from the main power supply to multiple loads. Junction boxes are usually controlled by specialized operators to achieve current distribution. When the circuit structure of the junction box is complex and the types of electronic components are diverse, the junction box will have higher technical requirements for the operator. Moreover, due to the complex circuit structure of the junction box, after the operator controls the junction box, the current from the main power supply needs to pass through more electronic components in the junction box before reaching the load. The control response time will be longer, which cannot meet the user's demand for short control response time.

[0003] However, the circuit structures of the currently commonly used junction boxes are relatively complex, so there is an urgent need to provide a junction box with a simple circuit structure and a short control response time. Utility Model Content

[0004] The utility model provides a junction box and a vehicle, wherein the junction box comprises a small number of electronic components, a small number of types, and a simple connection relationship, so the circuit structure thereof is simple, and in the above-mentioned junction box, a controller controls a switch to further control whether a load is powered, and this process involves a small number of electronic components, so the overall control response time of the junction box is also short.

[0005] In the first aspect, the utility model provides a junction box, which includes: a positive power interface, a negative power interface, a first switch, a second switch, a first interface, a second interface, a third interface, a fourth interface and a control interface; the first end of the positive power interface is connected to the first end of the first switch and the first end of the second switch, the second end of the first switch is connected to the first end of the first interface, the second end of the second switch is connected to the first end of the third interface, the second end of the first interface is used to connect the first end of the first load, the second end of the third interface is used to connect the first end of the second load, the first switch and the second switch are connected in parallel, the first load and the second load are connected in parallel, and the second end of the positive power interface is used to connect the positive pole of the power supply; the first end of the negative power interface is connected to the first end of the second interface and the first end of the fourth interface, the second end of the second interface is connected to the second end of the first load, the second end of the fourth interface is connected to the second end of the second load, and the second end of the negative power interface is used to connect the negative pole of the power supply; the first switch and the second switch are both connected to the control interface, the control interface is used to connect to a controller, and the first switch and the second switch are both controlled by the controller.

[0006] The above-mentioned junction box only includes a first switch and a second switch. The two ends of the first switch are respectively connected to the first load and the power supply, and the two ends of the second switch are respectively connected to the second load and the power supply. Therefore, the structure of the junction box circuit is very simple. In addition, since the first load and the second load are respectively connected to the power supply through a switch, the operator can control the closing and opening of the first switch and the second switch through a controller to achieve control of the current flowing into the first load and the second load. Therefore, the junction box also has low technical requirements for the operator.

[0007] In addition, since the operator controls the opening and closing of the first switch and the second switch through the controller, and then controls whether the first load and the second load are powered, in this process, the control response time of the junction box is only related to the response time of the first switch and the second switch. Therefore, the above-mentioned junction box circuit also has the advantage of short control response time.

[0008] In a possible implementation manner of the first aspect, the first switch and the second switch are both relays, or the first switch and the second switch are both contactors.

[0009] In the junction box provided by the utility model, the first switch and the second switch can be adjusted according to the specific application scenario of the junction box. For example, when the power supply is a DC power supply and the first load and the second load require DC current, the first switch and the second switch in the junction box can be set as relays, so that the junction box distributes DC current to the first load and the second load; when the power supply is an AC power supply and the first load and the second load require AC current, the first switch and the second switch in the junction box can be set as contactors, so that the junction box distributes AC current to the first load and the second load.

[0010] In a possible implementation of the first aspect, the junction box circuit also includes a third switch; the third switch is connected in series between the first end of the negative power interface and the second end of the second interface; the third switch is also connected to the control interface, and the third switch is also controlled by the controller.

[0011] Since there are risks when a single switch controls whether a load is powered, for example, when only the first switch controls whether the first load is powered, assuming that the first switch cannot be disconnected or is short-circuited, the power supply is directly connected to the first load, and the first load is no longer controlled by the first switch. Regardless of whether the first load needs to be powered in an actual scenario, the first load will always be powered, causing unnecessary energy loss. Moreover, the fact that the first load is always powered means that the first load is always in working condition, which will also reduce the life of the first load. Therefore, a third switch is provided between the first end of the negative electrode interface of the power supply and the second end of the second interface. Whether the first load can be powered depends on whether the first switch and the third switch are closed at the same time.

[0012] Similarly, a fourth switch may be provided between the first end of the negative power supply interface and the second end of the fourth interface, or a fourth switch may be provided between the first source of the positive power supply interface and the first end of the second switch. The fourth switch is connected to the controller and is controlled by the controller. Whether the second load can be powered at this time depends on whether the second switch and the fourth switch are closed at the same time. In this way, when the second switch cannot be disconnected or is short-circuited, it can be avoided that the second load is powered all the time, causing unnecessary energy loss and reducing the life of the second load.

[0013] In a possible implementation manner of the first aspect, when the first switch is a relay, the third switch is also a relay; and when the first switch is a contactor, the third switch is also a contactor.

[0014] In the above junction box, the types of all switches should be consistent to ensure the normal operation of the circuit. For example, when the power supply is a DC power supply, the first switch, the second switch and the third switch should all be relays. When the power supply is an AC power supply, the first switch, the second switch and the third switch should all be contactors.

[0015] It is explained here that the above junction box only limits the types of the first switch, the second switch and the third switch to be the same, but the accuracy specifications of different switches can be different. For example, the accuracy of the first switch is greater than that of the second switch, and the accuracy of the second switch is greater than that of the third switch. By selecting relays with different accuracy specifications, the junction box can be "multiple-purpose", that is, to provide corresponding services for loads with different control response time requirements, taking into account both the economy and practicality of the junction box.

[0016] In a possible implementation manner of the first aspect, the relay is a reed switch relay.

[0017] Since the control response time of the above-mentioned junction box is related to the response time of the first switch and the second switch, the selection of the first switch and the second switch affects the control response time of the junction box. When the power supply is a DC power supply and the first switch and the second switch are reed switch relays, since the response time of the reed switch relay is very short, as low as 1ms, the control response time of the above-mentioned junction box circuit can be further shortened.

[0018] In a possible implementation manner of the first aspect, the first end of the first interface includes two pins, and the two pins are connected to the second end of the first switch in parallel.

[0019] If the first end of the first interface is connected to the second end of the first switch through a single pin, if the single pin fails (such as the pin falls off) or the connection line between the single pin and the second end of the first switch is disconnected, the first load cannot be powered even if the first switch is closed. Therefore, by providing two pins at the first end of the first interface, the two pins are connected to the second end of the first switch in parallel. In this way, when one of the pins fails or the connection line between the pin and the second end of the first switch is disconnected, the power supply can continue to power the first load.

[0020] Similarly, the second interface, the third interface, the fourth interface, the control interface, the positive power supply interface and the negative power supply interface can all be provided with two pins at their first ends, and the two pins are connected in parallel to the electronic devices connected to these interfaces. When one of the pins at the above interfaces fails or the connection line between the pin and the connected device is disconnected, the power supply can continue to supply power to each load.

[0021] Taking the third interface as an example, two pins can be set for the first end of the third interface, and the two pins are connected to the second end of the second switch in parallel. In this way, when one of the pins at the first end of the third interface fails or the connection line between the pin and the second switch is disconnected, the power supply can continue to supply power to the second load.

[0022] In a second aspect, the utility model provides a vehicle, comprising the junction box described in the first aspect and any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a commonly used junction box.

[0025] Figure 2 The utility model provides a junction box;

[0026] Figure 3 This is a schematic diagram of the connection relationship between a switch and a controller in a junction box provided by the utility model;

[0027] Figure 4 This is a schematic diagram of the connection relationship between a switch and a controller in another junction box provided by the utility model;

[0028] Figure 5 The utility model is a top view schematic diagram of a junction box with a shell and a circuit board. DETAILED DESCRIPTION

[0029] The technical solutions involved in the utility model are described clearly and completely below in conjunction with the accompanying drawings. The embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, products or devices.

[0031] It should be noted that the terms of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0032] Junction boxes are often used in power systems. They are a type of equipment used for power control and power distribution. The role of junction boxes in power systems is usually to distribute the current from the main power supply to multiple loads. Junction boxes are usually controlled by specialized operators to achieve current distribution. If the circuit structure of the junction box is complex and the types of electronic components are diverse, the junction box will require a higher level of technical skills from the operator. Moreover, due to the complex circuit structure of the junction box, after the operator controls the junction box, the current from the main power supply needs to pass through more electronic components in the junction box before it can reach the load. The control response time will be longer, which cannot meet the user's demand for short control response time.

[0033] However, the circuit structures of the currently commonly used junction boxes are relatively complex. Figure 1 , Figure 1 It is a commonly used junction box, such as Figure 1 As shown, the junction box includes a DC voltage detection unit, a DC current detection unit, a relay control unit, a microcontroller unit (MCU) main control, an indication circuit, a communication circuit and a power supply circuit. The specific process of the operator controlling the junction box to distribute current to multiple loads is as follows: when there is current input (i.e. Figure 1 When the DC input is shown in the figure, the operator obtains the relevant parameters (such as the main circuit voltage intensity and the main circuit current intensity) collected by the communication circuit, the indication circuit, the power supply circuit and the DC current detection unit through the MCU main control, and analyzes these parameters to obtain the control parameters of the relay control unit, and then adjusts the relay control unit by using the control parameters to control the output of the current (i.e. Figure 1The DC output shown in the figure shows that the junction box requires the operator to have a certain understanding or knowledge of the MCU main control, communication circuit, and indication circuit, so it requires a high level of technical skills of the operator. Moreover, after the operator controls the junction box, the current from the main power supply needs to pass through the DC voltage detection unit, DC current detection unit, and relay control unit in the junction box to reach the load. The current transmission path is long, so Figure 1 The junction box shown also has the problem that after the operator operates, it takes a long time for the load to be powered, that is, there is a problem that the control response time of the junction box is long.

[0034] Therefore, there is an urgent need to provide a junction box with a simple circuit structure and a short control response time.

[0035] In view of the problems existing in the above junction box, the utility model provides a junction box, see Figure 2 , Figure 2 The utility model provides a junction box, such as Figure 2 As shown, the junction box includes a positive power interface HV, a negative power interface LV, a first switch KA1, a second switch KA2, a first interface P1, a second interface N1, a third interface P2, a fourth interface N2 and a control interface. Here, Figure 2 ① represents the first end of each device and interface, and ② represents the second end of each device and interface. Taking the first interface P1 as an example, ① at the first interface P1 represents the first end of the first interface P1, and ② at the first interface P1 represents the second end of the first interface P1.

[0036] The first end of the positive power interface HV is connected to the first end of the first switch KA1 and the first end of the second switch KA2, the second end of the first switch KA1 is connected to the first end of the first interface P1, the second end of the second switch KA2 is connected to the first end of the third interface P2, the second end of the first interface P1 is used to connect the first end of the first load, the second end of the third interface P2 is used to connect the first end of the second load, the first switch KA1 and the second switch KA2 are connected in parallel, the first load and the second load are connected in parallel, and the second end of the positive power interface HV is used to connect the positive pole of the power supply; the first end of the negative power interface LV is connected to the first end of the second interface N1 and the first end of the fourth interface N2, the second end of the second interface N1 is connected to the second end of the first load, the second end of the fourth interface N2 is connected to the second end of the second load, and the second end of the negative power interface LV is used to connect the negative pole of the power supply; the first switch KA1 and the second switch KA2 are both connected to the control interface, the control interface is used to connect to the controller, and the first switch KA1 and the second switch KA2 are both controlled by the controller.

[0037] Here, the first switch KA1 and the second switch KA2 are both relays, or both are contactors. In the junction box provided by the utility model, the types of the first switch KA1 and the second switch KA2 can be adjusted according to the specific application scenario of the junction box. For example, when the power supply is a DC power supply and the first load and the second load require DC current, the first switch KA1 and the second switch KA2 in the junction box can be set as relays, so that the junction box distributes DC current to the first load and the second load; when the power supply is an AC power supply and the first load and the second load require AC current, the first switch KA1 and the second switch KA2 in the junction box can be set as contactors, so that the junction box distributes AC current to the first load and the second load.

[0038] It should be noted that the above content only limits the types of the first switch KA1 and the second switch KA2 to be the same, but the accuracy specifications of different switches can be different. For example, the accuracy of the first switch KA1 is greater than the accuracy of the second switch KA2. By selecting relays with different accuracy specifications, the junction box can be "multiple-purpose", that is, to provide corresponding services for loads with different control response time requirements, taking into account both the economy and practicality of the junction box.

[0039] In a possible embodiment, a third switch KA3 is further provided between the first end of the negative power interface LV and the second end of the second interface N1. Since there are risks when a single switch controls whether the load is powered, for example, when only the first switch KA1 controls whether the first load is powered, if the first switch KA1 cannot be disconnected or is short-circuited, the power supply is directly connected to the first load, and the first load is no longer controlled by the first switch KA1. Regardless of whether the first load needs to be powered in the actual scenario, the first load will always be powered, causing unnecessary energy loss. Moreover, the first load is always powered, which means that the first load is always in working state, which will also reduce the life of the first load. Therefore, by providing a third switch KA3 between the first end of the negative power interface LV and the second end of the second interface N1, whether the first load can be powered depends on whether the first switch KA1 and the third switch KA3 are closed at the same time.

[0040] Similarly, a fourth switch KA4 may be provided between the first end of the negative power interface LV and the second end of the fourth interface N2, or a fourth switch KA4 may be provided between the first source of the positive power interface HV and the first end of the second switch KA2. The fourth switch KA4 is connected to the controller and is controlled by the controller. Whether the second load can be powered at this time depends on whether the second switch KA2 and the fourth switch KA4 are closed at the same time. In this way, when the second switch KA2 cannot be disconnected or is short-circuited, it can prevent the second load from being powered all the time, causing unnecessary energy loss and reducing the life of the second load.

[0041] In a possible embodiment, the first switch KA1 and the second switch KA2 are reed switch relays. Since the control response time of the junction box is related to the response time of the first switch KA1 and the second switch KA2, the selection of the first switch KA1 and the second switch KA2 affects the control response time of the junction box. When the power supply is a DC power supply, and the first switch KA1 and the second switch KA2 are reed switch relays, since the response time of the reed switch relay is very short, as low as 1ms, the control response time of the junction box circuit can be further shortened.

[0042] In a possible embodiment, the first end of the first interface P1 is provided with two pins. If the first end of the first interface P1 is connected to the second end of the first switch KA1 through a single pin, if the single pin fails (such as the pin falls off) or the connection line between the single pin and the second end of the first switch KA1 is disconnected, even if the first switch KA1 is closed, the first load cannot be powered. Therefore, by providing two pins at the first end of the first interface P1, the two pins are connected to the second end of the first switch KA1 in parallel. In this way, when one of the pins fails or the connection line between the pin and the second end of the first switch KA1 is disconnected, the power supply can continue to power the first load.

[0043] Similarly, the second interface N1, the third interface P2, the fourth interface N2, the control interface, the positive power interface HV and the negative power interface LV can all be provided with two pins at their first ends, and the two pins are connected in parallel to the electronic devices connected to these interfaces. When one of the pins at the above interfaces fails or the connection line between the pin and the connected device is disconnected, the power supply can continue to supply power to each load.

[0044] Taking the third interface P2 as an example, two pins can be set at the first end of the third interface P2, and the two pins are connected to the second end of the second switch KA2 in parallel. In this way, when one of the pins at the first end of the third interface P2 fails or the connection line between the pin and the second switch KA2 is disconnected, the power supply can continue to supply power to the second load.

[0045] In order to more clearly understand the control process of the first switch KA1 and the second switch KA2 by the controller, Figure 3 to be described in detail.

[0046] See also Figure 3 , Figure 3 This is a schematic diagram of the connection relationship between a switch and a controller in a junction box provided by the utility model. Figure 3As shown, the control circuit 300 includes a first switch KA1 and a second switch KA2, and the controller includes a switch K1, a switch K2, a switch K3 and a switch K4. The controller can control the closing and opening of the switches (K1, K2, K3 and K4).

[0047] The first switch KA1 and the second switch KA2 include 4 ports: Figure 2 The first end ① and the second end ② shown, and Figure 3 The third terminal ③ and the fourth terminal ④ are shown in the control circuit 300, wherein only the third terminal ③ and the fourth terminal ④ are embodied in the control circuit 300. The description of the first terminal and the second terminal of the first switch KA1 and the second switch KA2 can be referred to above. Figure 2 The first switch KA1 and the second switch KA2 are connected to the Figure 2 Whether the junction box shown in the figure is closed and connected depends on the type of the first switch KA1 and the second switch KA2 and the power supply of the first switch KA1 and the second switch KA2. For example, when the first switch KA1 is a normally open relay, when the third terminal and the fourth terminal of the first switch KA1 are powered, the first switch KA1 is closed and connected. Figure 2 The junction box shown is closed and conductive; when the first switch KA1 is a normally closed relay, when the third and fourth terminals of the first switch KA1 are energized, the first switch KA1 is Figure 2 The junction box shown is disconnected and not conductive.

[0048] In the control circuit 300, the third end of the first switch KA1 is connected to the switch K1 through the control interface, and the fourth end of the first switch KA1 is connected to the switch K2 through the control interface; the third end of the second switch KA2 is connected to the switch K3 through the control interface, and the fourth end of the second switch KA2 is connected to the switch K4 through the control interface.

[0049] After the control interface is connected to the controller, the controller controls the first switch KA1 and the second switch KA2 to open and close by controlling the switches (K1, K2, K3 and K4). Figure 2 Closure and opening in junction box shown.

[0050] Need to explain, Figure 3 The control circuit 300 shown is only an example. In a specific implementation, a suitable number of switches can be selected according to the actual scenario. For example, a third switch KA3 and a fourth switch KA4 can be added.

[0051] pass Figure 2 as well as Figure 3It can be seen that since the above junction box only includes the first switch KA1 and the second switch KA2, the two ends of the first switch KA1 are respectively connected to the first load and the power supply, and the two ends of the second switch KA2 are respectively connected to the second load and the power supply, the structure of the junction box circuit is very simple, and since the first load and the second load are each connected to the power supply through a switch, the operator can control the current flowing into the first load and the second load by controlling the closing and opening of the first switch KA1 and the second switch KA2 through the controller, so the junction box also has low technical requirements for the operator. In addition, since the operator controls the opening and closing of the first switch KA1 and the second switch KA2 through the controller, and then controls whether the first load and the second load are powered, in this process, the control response time of the junction box is only related to the response time of the first switch KA1 and the second switch KA2, so the above junction box circuit also has the advantage of short control response time.

[0052] It should be understood that Figure 2 As an example of the junction box provided by the present invention, in a specific implementation, the junction box provided by the present invention may include more switches connecting the power supply and the controller, such as the fifth switch KA5, the sixth switch KA6, etc. These switches can be used to control whether more loads are powered. For example, the junction box provided by the present invention also includes the fifth switch KA5 for controlling whether the third load is powered. Figure 4 , Figure 4 It is a schematic diagram of the connection relationship between a switch and a controller in another junction box provided by the utility model.

[0053] Combination Figure 2 It can be seen that Figure 4 The circuit shown is Figure 2 The circuits shown differ only in that: Figure 4 The circuit shown has a fifth switch KA5, a third load, a fifth interface P3 and a sixth interface N3. Figure 4 and Figure 2 For the same parts, see Figure 2 Related description, the following only describes Figure 4 and Figure 2 Different parts.

[0054] exist Figure 4 In the figure, the first end of the positive power interface HV is connected to the first end of the fifth switch KA5, and the first end of the fifth interface P3 is connected to the second end of the fifth switch KA5; the second end of the fifth interface P3 is used to connect to the first end of the third load; the first end of the negative power interface LV is connected to the first end of the sixth interface N3, and the second end of the sixth interface N3 is used to connect to the second end of the third load; the fifth switch KA5 is connected to the control interface.

[0055] It can be understood that in a specific implementation, the junction box should also have a housing and a printed circuit board (PCB). The circuit in the junction box is usually arranged on the PCB. Figure 5 , Figure 5 The utility model is provided with a schematic top view of a junction box having a housing and a circuit board.

[0056] exist Figure 5 In the junction box shown in the figure, four output interfaces (P1, P2, N1, N2) are arranged on the housing (i.e. Figure 2 The first interface P1, the second interface N1, the third interface P2 and the fourth interface N2 shown in FIG. 1 ), two input interfaces (HV, LV) (i.e., the above Figure 2 The positive power interface HV and the negative power interface LV) and the control interface shown in the figure, specifically, these interfaces can be arranged on the same side of the housing, or on different sides. Figure 5 In the example, 2 input interfaces and a control interface are arranged on the same side of the shell, and 4 output interfaces and a control interface and 2 input interfaces are arranged on the other side of the shell.

[0057] The circuit board can be set Figure 2 The first switch KA1 and the second switch KA2 are shown, as well as the lines between the first switch KA1, the second switch KA2 and the positive and negative power supply interfaces LV, the positive power supply interface HV, and the first interface P1 to the fourth interface N2.

[0058] In a possible embodiment, the junction box can be used together with an insulation impulse tester (which can be regarded as a controller) to detect the condition of a workpiece, which specifically includes the following steps (1)-(3):

[0059] (1) Line connection: Connect the workpiece to be tested to the input terminal of the insulation pulse tester, connect the output terminal of the insulation pulse tester to the control interface of the above-mentioned junction box, connect the positive pole of the DC adjustable power supply to the positive power supply interface HV in the above-mentioned junction box, connect the negative pole of the DC adjustable power supply to the negative power supply interface LV in the above-mentioned junction box, and finally connect the light bulb 1 as the first load between the first interface P1 and the second interface N1 in the above-mentioned junction box, and connect the light bulb as the second load between the third interface P2 and the fourth interface N2 in the above-mentioned junction box.

[0060] (2) Measurement: Start the insulation pulse tester and observe the changes of Bulb 1 and Bulb 2 at the same time.

[0061] (3) Obtaining results: The state of the workpiece to be tested is determined based on the internal logic of the insulation pulse tester and the power supply status of bulbs 1 and 2.

[0062] The internal logic of the insulation pulse tester may be to limit a certain voltage range. When the pulse voltage of the workpiece to be tested exceeds the range, the insulation pulse tester controls the first switch KA1 or the second switch KA2 in the junction box through the control interface.

[0063] The internal logic of the above insulation pulse tester is explained with an example.

[0064] Assuming that the certain voltage range limited by the above internal logic is -5V to 5V, the initial state of the first switch KA1 and the second switch KA2 in the junction box is disconnected. When the insulation pulse tester detects that the pulse voltage of the workpiece to be tested exceeds 5V, the first switch KA1 in the junction box is controlled to be closed through the control interface, and the bulb 1 is electrically illuminated. When the insulation pulse tester detects that the pulse voltage of the workpiece to be tested is lower than -5V, the second switch KA2 in the junction box is controlled to be closed through the control interface, and the bulb 2 is electrically illuminated.

[0065] After the internal logic of the insulation pulse tester is determined, the state of the workpiece to be tested can be judged according to the power supply status of bulbs 1 and 2. Taking the internal logic mentioned above as an example, when bulb 1 is energized and illuminated, it means that the insulation pulse tester has controlled the first switch KA1 to be in a closed state, which means that the insulation pulse tester has detected that the pulse voltage of the workpiece to be tested exceeds 5V, and it can be concluded that the high voltage of the workpiece to be tested is too high; when bulb 2 is energized and illuminated, it means that the insulation pulse tester has controlled the second switch KA2 to be in a closed state, which means that the insulation pulse tester has detected that the pulse voltage of the workpiece to be tested is lower than -5V, and it can be concluded that the low voltage of the workpiece to be tested is too low.

[0066] The utility model also provides a vehicle, which comprises the above Figure 2 , Figure 4 and Figure 5 A junction box as shown in any one or more of the figures.

[0067] In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For the part that is not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0068] Those of ordinary skill in the art will appreciate that the modules and circuits of the various examples described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different circuit structures to implement the described functions for each specific application scenario, but such implementation should not be considered to be beyond the scope of the present utility model.

[0069] In the several embodiments provided by the present utility model, it should be understood that the disclosed circuits and devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0070] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0071] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0072] The above is a detailed introduction to the disclosed embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A junction box, characterized in that: The junction box includes: a positive power supply interface, a negative power supply interface, a first switch, a second switch, a first interface, a second interface, a third interface, a fourth interface and a control interface; The first end of the positive power interface is connected to the first end of the first switch and the first end of the second switch, the second end of the first switch is connected to the first end of the first interface, the second end of the second switch is connected to the first end of the third interface, the second end of the first interface is used to connect to the first end of the first load, the second end of the third interface is used to connect to the first end of the second load, the first switch and the second switch are connected in parallel, the first load and the second load are connected in parallel, and the second end of the positive power interface is used to connect to the positive electrode of the power supply; The first end of the power supply negative electrode interface is connected to the first end of the second interface and the first end of the fourth interface, the second end of the second interface is connected to the second end of the first load, the second end of the fourth interface is connected to the second end of the second load, and the second end of the power supply negative electrode interface is used to connect the negative electrode of the power supply; The first switch and the second switch are both connected to the control interface, the control interface is used to connect to a controller, and the first switch and the second switch are both controlled by the controller.

2. The junction box according to claim 1, characterized in that: The first switch and the second switch are both relays, or the first switch and the second switch are both contactors.

3. The junction box according to claim 1, characterized in that: The first end of the first interface includes two pins, and the two pins are connected in parallel to the second end of the first switch.

4. The junction box according to any one of claims 1 to 3, characterized in that: The junction box circuit also includes a third switch; The third switch is connected in series between the first end of the negative power supply interface and the second end of the second interface; The third switch is also connected to the control interface, and the third switch is also controlled by the controller.

5. The junction box according to claim 4, characterized in that: When the first switch is a relay, the third switch is also a relay. When the first switch is a contactor, the third switch is also a contactor.

6. The junction box according to claim 5, characterized in that: The relay is a reed switch relay.

7. A vehicle, characterized in that: The vehicle comprises the junction box according to any one of claims 1 to 6.

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