CN222581981U - Junction box and vehicle - Google Patents

Abstract

The utility model provides a junction box and a vehicle, wherein the junction box comprises a power anode interface, a power cathode 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 anode interface is connected with a first end of the first switch and a first end of the second switch, a second end of the first switch is connected with the first interface, a second end of the second switch is connected with the third interface, a first end of the power 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 anode interface and the power cathode interface, the control interface is connected with a controller, and the controller is used for controlling the first switch and the second switch. The branch box has the advantages that the types of electronic devices are fewer, the connection relation is simple, the circuit structure is simple, and the whole control response time is shorter because the electronic devices involved in the control process are fewer.

Description

Junction box and vehicle

Technical Field

The utility model relates to the technical field of junction boxes, in particular to a junction box and a vehicle.

Background

A junction box is often used in an electric power system, and is a device for controlling and distributing electric power, and the junction box generally has a function of distributing electric current from a power source to a plurality of loads in the electric power system. The junction boxes are typically controlled by a specialized operator to effect current distribution. When the circuit structure of the junction box is complex and the types of electronic devices are various, the technical level requirement of the junction box on operators is high, and moreover, due to the complex circuit structure of the junction box, after the operators control the junction box, the current from the main power supply needs to pass through more electronic devices in the junction box to reach the load, the control response time is long, and the requirement of short user control response time cannot be met.

However, the circuit structure of the current junction box is complex, so it is needed to provide a junction box with simple circuit structure and short control response time.

Disclosure of utility model

The utility model provides a junction box and a vehicle, wherein the junction box has the advantages of less electronic devices, less types and simple connection relation, so that the circuit structure formed by the junction box is simple, and a controller controls a switch in the junction box to further control whether a load is electrified or not, so that fewer electronic devices are involved in the process, and the control response time of the whole junction box is short.

The utility model provides a junction box, which 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, wherein the first end of the power positive electrode 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 end of the first interface, the second end of the second switch is connected with the first end of the third interface, the second end of the first interface is used for being connected with the first end of a first load, the second end of the third interface is used for being connected with the first end of a second load, the first switch is connected with the second switch in parallel, the first load is connected with the second load in parallel, the second end of the power positive electrode interface is used for being connected with the positive electrode of a power supply, the first end of the second switch is connected with the first end of the fourth interface, the second end of the second switch is connected with the second end of the second interface, the second end of the second switch is connected with the second switch, and the second end of the second switch is connected with the second switch is used for being connected with the negative electrode of the power supply.

The junction box only comprises the first switch and the second switch, the two ends of the first switch are respectively connected with the first load and the power supply, and the two ends of the second switch are respectively connected with the second load and the power supply, so that the junction box circuit is quite simple in structure, and because the first load and the second load are respectively connected with the power supply through one switch, an operator can control the closing and opening of the first switch and the second switch through the controller, the control of the current flowing into the first load and the second load can be realized, and therefore, the junction box has lower technical requirements on the operator.

In addition, because 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 electrified, in the process, the control response time of the junction box is only related to the response time of the first switch and the second switch, and therefore the junction box circuit has the advantage of short control response time.

In a possible implementation manner of the first aspect, the first switch and the second switch are each a relay, or the first switch and the second switch are each a contactor.

In the junction box provided by the utility model, the first switch and the second switch can be adjusted according to the specific application scene of the junction box, for example, when the power supply is a direct current power supply and the first load and the second load need direct current, the first switch and the second switch in the junction box can be set as relays, so that the junction box can distribute direct current for the first load and the second load, and when the power supply is an alternating current power supply and the first load and the second load need alternating current, the first switch and the second switch in the junction box can be set as contactors, so that the junction box can distribute alternating current for the first load and the second load.

In a possible implementation manner of the first aspect, the junction box circuit further includes a third switch, where the third switch is connected in series between the first end of the power supply negative electrode interface and the second end of the second interface, and the third switch is also connected to the control interface, and the third switch is also controlled by the controller.

Since there is a risk that whether the single switch controls the load to get electricity, for example, when only the first switch controls whether the first load gets electricity, it is assumed that the first switch cannot be opened or is shorted, at this time, the power supply is directly connected to the first load, the first load is no longer controlled by the first switch, no matter whether the first load needs to get electricity or not in an actual scenario, the first load always gets electricity, so that unnecessary energy loss is caused, and the first load always gets electricity, which means that the first load is always in an operating state, so that the service life of the first load is reduced, therefore, by setting a third switch between the first end of the negative electrode interface of the power supply and the second end of the second interface, at this time, the first load can get electricity or not, depending on whether the first switch and the third switch are closed at the same time.

Similarly, a fourth switch can be arranged between the first end of the power negative electrode interface and the second end of the fourth interface, or a fourth switch is arranged between the first source of the power positive electrode interface and the first end of the second switch, the fourth switch is connected with the controller, and is controlled by the controller, so that the second load can be powered on or not, and the second load can be powered off or not, depending on whether the second switch and the fourth switch are simultaneously powered on or not, and under the condition that the second switch cannot be disconnected or short-circuited, the second load can be prevented from being powered on all the time, unnecessary energy loss is caused, and the service life of the second load is reduced.

In a possible implementation manner of the first aspect, in case the first switch is a relay, the third switch is also a relay, and in case the first switch is a contactor, the third switch is also a contactor.

In the above junction box, the types of all the 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 be relays, and when the power supply is an ac power supply, the first switch, the second switch and the third switch should be contactors.

Here, the junction box is limited to the first switch, the second switch and the third switch, but the accuracy specifications of the switches may 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. The relay with different precision specifications is selected to provide corresponding service for loads with different control response time requirements, so that the economic efficiency of the junction box is considered, and the practicability of the junction box is also considered.

In one possible implementation manner of the first aspect, the relay is a reed switch relay.

The control response time of the junction box is related to the response time of the first switch and the second switch, so that the selection of the first switch and the second switch affects the control response time of the junction box, and when the power supply is a direct current power supply and the first switch and the second switch are reed-type relays, the control response time of the junction box circuit can be further shortened due to the fact that the response time of the reed-type relays is very short and as low as 1 ms.

In a possible implementation manner of the first aspect, the first end of the first interface includes two pins, and the two pins connect the second end of the first switch in parallel.

Since the first end of the first interface is connected to the second end of the first switch through the single pin, if a single pin fails (such as the pin falls off) or if a connection line between the single pin and the second end of the first switch is disconnected, the first load cannot be supplied with power even if the first switch is closed.

Similarly, the second interface, the third interface, the fourth interface, the control interface, the power supply positive electrode interface and the power supply negative electrode interface can be provided with two pins at the first end of the interface, the two pins are connected with the electronic devices connected with the interfaces in a parallel connection mode, and when one of the pins at the interfaces fails or a connecting line between the pin and the connected device is disconnected, the power supply can continuously supply power to each load.

Taking the third interface as an example, two pins may be provided for the first end of the third interface, where the two pins are connected to the second end of the second switch in parallel, so that the power supply may continue to supply power to the second load in case one of the pins at the first end of the third interface fails or a connection line between the pin and the second switch is disconnected.

In a second aspect, the present utility model provides a vehicle comprising a junction box as described in the first aspect and any possible implementation manner of the first aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a current junction box;

FIG. 2 is a junction box provided by the present utility model;

FIG. 3 is a schematic diagram showing a connection relationship between a switch and a controller in a junction box according to the present utility model;

FIG. 4 is a schematic diagram showing a connection relationship between a switch and a controller in another junction box according to the present utility model;

Fig. 5 is a schematic top view of a junction box with a housing and a circuit board according to the present utility model.

Detailed Description

The technical solutions to which the present utility model relates are clearly and completely described below with reference to the accompanying drawings. The embodiments described below are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may include other steps or elements not listed or inherent to such process, article, or apparatus.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms "a," "an," and "the" of this utility model are intended to include the plural forms as well, unless the context clearly indicates otherwise.

A junction box is often used in an electric power system, and is a device for controlling and distributing electric power, and the junction box generally has a function of distributing electric current from a power source to a plurality of loads in the electric power system. The junction boxes are typically controlled by a specialized operator to effect current distribution. If the circuit structure of the junction box is complex, when the types of electronic devices are various, the technical level requirement of the junction box on operators is higher, and moreover, because the circuit structure of the junction box is complex, after the operators control the junction box, the current from the main power supply needs to pass through more electronic devices in the junction box to reach the load, the control response time is longer, and the requirement of short user control response time cannot be met.

However, the current junction box is relatively complex in circuit structure, referring to fig. 1, fig. 1 is a current junction box, and as shown in fig. 1, the junction box includes a dc voltage detection unit, a dc current detection unit, a relay control unit, a micro control unit (Microcontroller Unit, MCU) main control, an indication circuit, a communication circuit and a power circuit. The specific process of controlling the junction box to distribute the current to the plurality of loads by the operator is that when the current is input (namely, the direct current input shown in fig. 1), the operator obtains related parameters (such as the voltage intensity of the main circuit and the current intensity of the main circuit) collected by the communication circuit, the indication circuit, the power supply circuit and the direct current detection unit through the MCU main control, analyzes the parameters to obtain the control parameters of the relay control unit, adjusts the relay control unit through the control parameters to further control the output of the current (namely, the direct current output shown in fig. 1), therefore, the junction box needs to know or recognize the MCU main control, the communication circuit and the indication circuit to a certain extent, the technical level requirement on the operator is higher, and after the operator controls the junction box, the current from the main power supply needs to reach the load through the direct current detection unit, the direct current detection unit and the relay control unit in the junction box, and the current transmission path is longer, so that the junction box shown in fig. 1 also has the problem that the load needs to be electrified after the operator operates, namely, the junction box needs to have longer response time.

Therefore, it is needed to provide a junction box with simple circuit structure and short control response time.

In view of the above problems in the junction box, referring to fig. 2, fig. 2 is a junction box according to the present utility model, as shown in fig. 2, the junction box includes a positive power supply interface H-V, a negative power supply interface L-V, 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, where ① in fig. 2 represents a first end of each device and interface, ② represents a second end of each device and interface, taking the first interface P1 as an example, ① at the first interface P1 represents a first end of the first interface P1, and ② at the first interface P1 represents a second end of the first interface P1.

The first end of the positive power interface H-V is connected with 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 with the first end of the first interface P1, the second end of the second switch KA2 is connected with the first end of the third interface P2, the second end of the first interface P1 is connected with 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, the second end of the positive power interface H-V is connected with the positive electrode of the power supply, the first end of the negative power interface L-V is connected with 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 with the second end of the first load, the second end of the fourth interface N2 is connected with the second end of the second load, the second end of the negative power interface L-V is connected with the negative electrode of the power supply, the first switch KA1 and the second switch KA2 are connected with the first control interface and the second controller, and the first controller KA2 are connected with the first controller.

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 scene of the junction box, for example, when the power supply is a direct current power supply and the first load and the second load need direct current, the first switch KA1 and the second switch KA2 in the junction box can be set as the relays, so that the junction box can distribute direct current for the first load and the second load, and when the power supply is an alternating current power supply and the first load and the second load need alternating current, the first switch KA1 and the second switch KA2 in the junction box can be set as the contactors, so that the junction box can distribute alternating current for the first load and the second load.

Here, the above description is only to limit the kinds of the first switch KA1 and the second switch KA2 to be identical, but the accuracy specifications may be different between different switches, for example, the accuracy of the first switch KA1 is greater than the accuracy of the second switch KA 2. The relay with different precision specifications is selected to provide corresponding service for loads with different control response time requirements, so that the economic efficiency of the junction box is considered, and the practicability of the junction box is also considered.

In a possible embodiment, a third switch KA3 is further provided between the first end of the negative power supply interface L-V and the second end of the second interface N1. Since there is a risk that whether the single switch controls the load to get electricity, for example, when only the first switch KA1 controls whether the first load gets electricity, if the first switch KA1 cannot be opened or is shorted, the power supply is directly connected to the first load, the first load is no longer controlled by the first switch KA1, no matter whether the first load needs to get electricity or not in an actual scene, the first load always gets electricity, which causes unnecessary energy loss, and the first load always gets electricity, which means that the first load is always in an operating state, so that the service life of the first load is reduced, therefore, by setting a third switch KA3 between the first end of the power supply negative electrode interface L-V and the second end of the second interface N1, at this time, the first load can get electricity or not, depending on whether the first switch KA1 and the third switch KA3 are closed at the same time.

Similarly, a fourth switch KA4 may be disposed between the first end of the negative power supply interface L-V and the second end of the fourth interface N2, or a fourth switch KA4 may be disposed between the first source of the positive power supply interface H-V and the first end of the second switch KA2, where the fourth switch KA4 is connected to the controller, and is controlled by the controller, and the second load can be powered up or not, depending on whether the second switch KA2 and the fourth switch KA4 are simultaneously closed, so that in the case that the second switch KA2 cannot be opened or short-circuited, the second load is prevented from being powered up all the time, causing unnecessary energy loss and reducing the service life of the second load.

In one possible embodiment, the first switch KA1 and the second switch KA2 are reed switches. Because 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, and when the power supply is a direct current power supply and the first switch KA1 and the second switch KA2 are reed-type relays, the control response time of the junction box circuit can be further shortened due to the fact that the response time of the reed-type relays is very short and as low as 1 ms.

In one possible embodiment, the first end of the first interface P1 is provided with two pins, and 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, the first load cannot be supplied even if the first switch KA1 is closed, so by providing the first end of the first interface P1 with two pins, the two pins are connected to the second end of the first switch KA1 in parallel, so that the power supply can continue to supply power to the first load in the case that one of the pins fails or the connection line between the pin and the second end of the first switch KA1 is disconnected.

Similarly, the second interface N1, the third interface P2, the fourth interface N2, the control interface, the power supply positive electrode interface H-V and the power supply negative electrode interface L-V may each be provided with two pins at the first end thereof, the two pins are connected with the electronic devices connected with the interfaces in parallel, and when one of the pins at the interfaces fails or the connection line between the pin and the connected device is disconnected, the power supply may continue to supply power to each load.

Taking the third interface P2 as an example, two pins may be disposed at the first end of the third interface P2, where the two pins are connected to the second end of the second switch KA2 in parallel, so that the power supply may continue to supply power to the second load in the case where one of the pins at the first end of the third interface P2 fails or a connection line between the pin and the second switch KA2 is disconnected.

In order to more clearly understand the control process of the controller for the first switch KA1 and the second switch KA2, the following description will be made in detail with reference to fig. 3.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating a connection relationship between a switch in a junction box and a controller, as shown in fig. 3, a 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, and the controller can control the switch (K1, K2, K3 and K4) to be turned on or turned off.

The first switch KA1 and the second switch KA2 comprise 4 ports, namely a first end ① and a second end ② shown in fig. 2, and a third end ③ and a fourth end ④ shown in fig. 3, wherein only the third end ③ and the fourth end ④ are embodied in the control circuit 300, and descriptions of the first end and the second end of the first switch KA1 and the second switch KA2 can be found in the related content in fig. 2, and are not described herein. Whether the first switch KA1 and the second switch KA2 are closed and conducted in the junction box shown in fig. 2 depends on the types of the first switch KA1 and the second switch KA2 and the power-on condition of the first switch KA1 and the second switch KA2, for example, when the first switch KA1 is a normally open relay, the first switch KA1 is closed and conducted in the junction box shown in fig. 2 when the third end and the fourth end of the first switch KA1 are energized, and when the first switch KA1 is a normally closed relay, the first switch KA1 is opened and non-conducted in the junction box shown in fig. 2 when the third end and the fourth end of the first switch KA1 are energized.

In the control circuit 300, a third end of the first switch KA1 is connected with the switch K1 through a control interface, a fourth end of the first switch KA1 is connected with the switch K2 through a control interface, a third end of the second switch KA2 is connected with the switch K3 through a control interface, and a fourth end of the second switch KA2 is connected with the switch K4 through a control interface.

After the control interface is connected to the controller, the controller controls the first switch KA1 and the second switch KA2 to be closed and opened in the junction box shown in FIG. 2 by controlling the opening and closing of the switches (K1, K2, K3 and K4).

It should be noted that the control circuit 300 shown in fig. 3 is merely an example, and in a specific implementation, an appropriate number of switches may be selected according to an actual scenario, for example, the third switch KA3 and the fourth switch KA4 may also be added.

As can be seen from fig. 2 and fig. 3, in the junction box, since the junction box only includes the first switch KA1 and the second switch KA2, the two ends of the first switch KA1 are respectively connected with the first load and the power supply, and the two ends of the second switch KA2 are respectively connected with 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 respectively connected with the power supply through one switch, an operator can control the current flowing into the first load and the second load by controlling the on/off of the first switch KA1 and the second switch KA2 through the controller, and therefore, the junction box has lower technical level requirements on the operator. In addition, because the operator controls the opening and closing of the first switch KA1 and the second switch KA2 through the controller, and further controls whether the first load and the second load are electrified, in the 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, and therefore the junction box circuit has the advantage of short control response time.

It should be understood that fig. 2 is only an example of a junction box provided by the present utility model, and in a specific implementation, the junction box provided by the present utility model may include more switches, such as a fifth switch KA5, a sixth switch KA6, etc., that connect the power source and the controller, and these switches may be used to control whether more loads get powered. Taking the fifth switch KA5 for controlling whether the third load is powered or not as an example, referring to fig. 4, fig. 4 is a schematic diagram of a connection relationship between a switch and a controller in another junction box according to the present utility model.

As can be seen in connection with fig. 2, the circuit shown in fig. 4 differs from the circuit shown in fig. 2 only in that the circuit shown in fig. 4 has more fifth switches KA5, third loads, fifth interfaces P3 and sixth interfaces N3. With respect to the same parts of fig. 4 as fig. 2, please refer to fig. 2 for a description, and only the parts of fig. 4 different from fig. 2 will be described below.

In fig. 4, a first end of a positive power supply interface H-V is connected to a first end of a fifth switch KA5, a first end of a fifth interface P3 is connected to a second end of the fifth switch KA5, a second end of the fifth interface P3 is used to connect to a first end of a third load, a first end of a negative power supply interface L-V is connected to a first end of a sixth interface N3, a second end of the sixth interface N3 is used to connect to a second end of the third load, and the fifth switch KA5 is connected to a control interface.

It will be appreciated that in a specific implementation, the junction box should also have a housing and a printed circuit board (Printed Circuit Board, PCB), and the circuits in the junction box are typically disposed on the PCB, and fig. 5 is a schematic top view of the junction box with the housing and the circuit board according to the present utility model.

In the junction box shown in fig. 5, 4 output interfaces (P1, P2, N1, N2) are provided on the housing (i.e., the first interface P1, the second interface N1, the third interface P2, and the fourth interface N2 shown in fig. 2 described above), 2 input interfaces (H-V, L-V) (i.e., the positive power supply interface H-V and the negative power supply interface L-V shown in fig. 2 described above), and control interfaces, specifically, these interfaces may be provided on the same side of the housing, or different sides, and in fig. 5, as an example, 2 input interfaces and control interfaces are provided on the same side of the housing, and 4 output interfaces and control interfaces and 2 input interfaces are provided on the other side of the housing.

The circuit board may be provided with a first switch KA1 and a second switch KA2 shown in fig. 2, and a circuit including the first switch KA1, a positive-negative power interface L-V, a positive power interface H-V, and first to fourth interfaces P1 to N2.

In one possible embodiment, the junction box may be used with an insulation pulse tester (which may be considered as a controller) to detect the condition of a workpiece, and specifically includes the following steps (1) - (3):

(1) Connecting a workpiece to be tested to the input end of an insulating pulse tester, connecting the output end of the insulating pulse tester to the control interface of the junction box, connecting the positive electrode of a direct current adjustable power supply to the positive electrode interface H-V of the power supply in the junction box, connecting the negative electrode of the direct current adjustable power supply to the negative electrode interface L-V of the power supply in the junction box, and finally connecting a bulb 1 serving as a first load to the junction box between the first interface P1 and the second interface N1 and connecting a bulb serving as a second load to the junction box between the third interface P2 and the fourth interface N2.

(2) The insulation pulse tester is started, and the change of the bulb 1 and the bulb 2 is observed at the same time.

(3) And obtaining a result, namely judging the state of the workpiece to be tested according to the internal logic of the insulated pulse tester and the power-on conditions of the bulb 1 and the bulb 2.

The internal logic of the insulating pulse tester can limit a certain voltage range, and when the pulse voltage of the workpiece to be tested exceeds the range, the insulating pulse tester controls the first switch KA1 or the second switch KA2 in the junction box through the control interface.

The internal logic of the above-described insulated pulse tester is illustrated.

Assuming that a certain voltage range defined by the internal logic is-5V to 5V, the initial states of the first switch KA1 and the second switch KA2 in the junction box are open, when the insulating pulse tester detects that the pulse voltage of the workpiece to be detected exceeds 5V, the first switch KA1 in the junction box is controlled to be closed through the control interface, the bulb 1 is electrified to emit light, and when the insulating pulse tester detects that the pulse voltage of the workpiece to be detected 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 electrified to emit light.

When the internal logic of the insulating pulse tester is determined, the state of the workpiece to be tested can be judged according to the electricity obtaining conditions of the bulb 1 and the bulb 2, and when the bulb 1 is electrified and emits light, the insulating pulse tester is used for controlling the first switch KA1 to be in a closed state, and further, the insulating pulse tester is used for detecting that the pulse voltage of the workpiece to be tested exceeds 5V, a conclusion can be drawn that the high voltage of the workpiece to be tested is too high, when the bulb 2 is electrified and emits light, the insulating pulse tester is used for controlling the second switch KA2 to be in a closed state, and further, the insulating pulse tester is used for detecting that the pulse voltage of the workpiece to be tested is lower than-5V, and a conclusion can be drawn that the low voltage of the workpiece to be tested is too low.

The present utility model also provides a vehicle comprising a junction box as shown in any one or more of the above figures 2, 4 and 5.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the modules and circuits of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various example components and steps have been described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different circuit configurations for each particular application scenario, but such implementation should not be considered to be beyond the scope of the present utility model.

In the several embodiments provided by the present utility model, it should be understood that the disclosed circuits and devices may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of 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.

In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing disclosure of embodiments of the utility model has been presented in a detailed description, and the principles and embodiments of the utility model have been described herein with reference to specific examples, the foregoing examples being provided to assist in the understanding of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (7)

1. A junction box, characterized in that the junction box comprises: 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 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 , wherein 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 , wherein the first end of the first interface comprises two pins, and the two pins are connected to the second end of the first switch in parallel. 4. The junction box according to any one of claims 1 to 3, characterized in that the junction box circuit further comprises 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 , wherein 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. 6 . The junction box according to claim 5 , wherein 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.