Battery charging and power distribution integrated box, vehicle large-current charging device and vehicle charging method

Abstract

The invention provides a battery charging and power distribution integrated box, a vehicle large-current charging device and an automobile charging method, and relates to the technical field of new energy automobiles, the battery charging and power distribution integrated box comprises a box body, a charging socket and a shunt relay; the charging socket is arranged on the side wall of the box body and is used for plugging a charging gun; the shunt relays are arranged in the accommodating cavity in pairs, one end of one shunt relay is connected with the positive electrode of the charging socket, the other end of the shunt relay is used for being connected with the positive electrode of the battery pack, one end of the other shunt relay is connected with the negative electrode of the charging socket, and the other end of the shunt relay is used for being connected with the negative electrode of the battery pack; the charging socket is arranged in the box body and is directly connected with the shunt relay, so that the charging socket is connected with the battery pack without wiring harness connection, and the problems that in the prior art, when an automobile charging device meets the large-current high-voltage charging requirement, high-voltage cables are heated seriously, large heat loss is caused, damage to different degrees or function failure often occurs, and the service life of the automobile charging device is prolonged are solved. And the maintenance cost is high.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a battery charging and distribution integrated box, a vehicle high-current charging device and a vehicle charging method. Background Art

[0002] The car charging distribution box is an important part of the electric vehicle charging system, mainly used to ensure the transmission and safety of power during the charging process. It is usually waterproof and dustproof to adapt to various outdoor environments. The distribution box is equipped with a power socket and a charging interface to facilitate the owner to charge. At the same time, it also has safety functions such as overload protection and short circuit protection to ensure the safety and reliability of the charging process.

[0003] The current vehicle charging device, especially the charging device of the new energy off-road dump truck, generally has a battery distribution box and the connection between the controller and the charging power socket is connected by a high-voltage cable. The vehicle power socket is arranged outside the battery distribution box and is independently installed on the vehicle. When charging with a small current, the cable diameter is small, and the high-voltage connector can meet the overcurrent capacity. This structure is simple and easy to implement.

[0004] However, when existing automobile charging devices are used to cope with high-current and high-voltage charging requirements, the high-voltage cables generate severe heat, resulting in large heat losses, often causing varying degrees of damage or functional failure, and high maintenance costs. Summary of the invention

[0005] The purpose of the present invention is to provide a battery charging and distribution integrated box, a vehicle high-current charging device and a car charging method, so as to solve the technical problems in the prior art that when the car charging device responds to the high-current and high-voltage charging requirements, the high-voltage cable generates serious heat, causes large heat loss, often suffers varying degrees of damage or functional failure, and has high maintenance costs.

[0006] In a first aspect, the present invention provides a battery charging and distribution integrated box, comprising:

[0007] A box body, wherein the box body is hollow and has a receiving cavity;

[0008] A charging socket, which is arranged on a side wall of the box body and is used to plug in a charging gun;

[0009] A shunt relay, wherein two shunt relays are arranged in the accommodating cavity, wherein one end of one of the shunt relays is connected to the positive pole of the charging socket, and the other end is used to be connected to the positive pole of the battery pack, and one end of the other shunt relay is connected to the negative pole of the charging socket, and the other end is used to be connected to the negative pole of the battery pack.

[0010] Furthermore, the battery charging and distribution integrated box also includes a power distribution control board, and the power distribution control board is electrically connected to the two shunt relays respectively to control the opening and closing of the shunt relays.

[0011] Furthermore, the battery charging and distribution integrated box also includes a mounting bracket, the mounting bracket is arranged in the accommodating cavity, and the power distribution control board is fixed to a side of the mounting bracket away from the shunt relay.

[0012] Furthermore, the battery charging and distribution integrated box also includes a low-voltage socket, which is arranged on the side wall of the box body, one end of the low-voltage socket is connected to the power distribution control board, and the other end of the low-voltage socket is used to connect to the power supply.

[0013] Furthermore, a remote communication module is provided on the power distribution control board, and the communication module can transmit charging data remotely.

[0014] Furthermore, the battery charging and distribution integrated box also includes a positive copper sheet and a negative copper sheet, one end of the positive copper sheet is connected to the positive pole of the charging socket, and the other end of the positive copper sheet is connected to the shunt relay connected to the positive pole of the charging socket, one end of the negative copper sheet is connected to the negative pole of the charging socket, and the other end of the negative copper sheet is connected to the shunt relay connected to the negative pole of the charging socket.

[0015] Furthermore, the battery charging and distribution integrated box also includes a current transformer, which is fixed in the shell, and the induction ring of the current transformer is sleeved on the middle part of the negative copper sheet, and the current transformer is connected to the power distribution control board.

[0016] Furthermore, the charging socket includes a socket body and a socket protection cover, the socket body is fixed to the side wall of the box body, and one side of the socket protection cover is hinged to the socket body so that the socket protection cover can be buckled on the socket body.

[0017] Furthermore, the charging socket also includes a sealing strip, and the sealing strip is arranged in the gap between the socket body and the box body.

[0018] Furthermore, a plurality of the charging sockets are arranged at intervals on the side wall of the box body, and a plurality of groups of the shunt relays are connected to the charging sockets in a one-to-one correspondence.

[0019] Furthermore, the battery charging and distribution integrated box also includes an output interface, which is arranged on the outer wall of the box body, and the output interfaces are connected to one of the shunt relays in groups of two.

[0020] Furthermore, the battery charging and distribution integrated box also includes a high-voltage cable, which is arranged in a one-to-one correspondence with the output interface, one end of the high-voltage cable is connected to the output interface, and the other end of the high-voltage cable is used to connect to the battery pack.

[0021] In a second aspect, the present invention further provides a high-current charging device for a vehicle, comprising the battery pack, the charging gun and the above-mentioned battery charging and distribution integrated box, wherein the battery pack is connected to the shunt relay, and the charging gun is connected to the charging interface.

[0022] In a third aspect, the present invention further provides a vehicle charging method, which is applied to the vehicle high-current charging device as described above, comprising:

[0023] Step 1: Power the power distribution control board through the low-voltage socket and turn on the power distribution control board;

[0024] Step 2: Plug in the charging gun and check the vehicle status through the current transformer;

[0025] Step three, when the vehicle is in a chargeable state, a high voltage command is sent to close the shunt relay; when the vehicle is in a non-chargeable state, fault information is fed back.

[0026] Furthermore, when a high voltage command is sent and the shunt relay is closed, the automobile cooling module is turned on.

[0027] Compared with the prior art, the present invention provides a battery charging and distribution integrated box, comprising a box body, a charging socket and a shunt relay; the box body is hollowly provided with a receiving cavity, the charging socket is arranged on the side wall of the box body, and the charging socket is used to plug in the charging gun; the shunt relays are arranged in a group of two in the receiving cavity, one end of one shunt relay is connected to the positive pole of the charging socket, and the other end is used to connect to the positive pole of the battery pack, and one end of the other shunt relay is connected to the negative pole of the charging socket, and the other end is used to connect to the negative pole of the battery pack; by arranging the charging socket in the box body and directly connecting it to the shunt relay, and thus connecting it to the battery pack without the need for wiring harness connection, the technical problems in the prior art that when the automobile charging device copes with the high-current and high-voltage charging demand, the high-voltage cable generates serious heat, causes large heat loss, often suffers different degrees of damage or functional failure, and has high maintenance cost are solved, and at the same time, two shunt relays are provided to shunt the high-voltage current, further reducing the heat loss of various components of the battery charging and distribution integrated box, reducing the risk of plug-in failure, and improving product stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the overall structure of a battery charging and distribution integrated box provided in an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of a positive copper sheet, a negative copper sheet and a current transformer in a battery charging and distribution integrated box provided in an embodiment of the present invention;

[0031] Figure 3 This is a structural schematic diagram of the box body, charging socket and output interface in the battery charging and distribution integrated box provided in an embodiment of the present invention.

[0032] Reference numerals:

[0033] 100, box body;

[0034] 200, charging socket; 210, socket body; 220, socket protection cover;

[0035] 300, shunt relay;

[0036] 400, power distribution control panel; 410, mounting bracket;

[0037] 500, low voltage socket;

[0038] 600, positive copper sheet;

[0039] 700, negative electrode copper sheet;

[0040] 800, current transformer;

[0041] 900. Output interface. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0049] like Figures 1 to 3As shown, an embodiment of the present invention provides a battery charging and distribution integrated box, including a box body 100, a charging socket 200 and a shunt relay 300. The box body 100 is hollow and has a receiving cavity; the charging socket 200 is arranged on the side wall of the box body 100, and the charging socket 200 is used to plug the charging gun; the shunt relays 300 are arranged in a group of two in the receiving cavity, one end of one shunt relay 300 is connected to the positive pole of the charging socket 200, and the other end is used to connect to the positive pole of the battery pack, and one end of the other shunt relay 300 is connected to the negative pole of the charging socket 200, and the other end is used to connect to the negative pole of the battery pack.

[0050] That is, the present invention provides a battery charging and distribution integrated box, which is connected to the battery pack by setting the charging socket 200 in the box body 100 and directly connecting it to the shunt relay 300 without the need for wiring harness connection. This solves the technical problems in the prior art that when the automobile charging device is required to cope with large current and high voltage charging, the high-voltage cable generates severe heat, causing large heat loss, often resulting in varying degrees of damage or functional failure, and high maintenance costs. At the same time, two shunt relays 300 are provided to shunt the high-voltage current, thereby further reducing the heat loss of various components of the battery charging and distribution integrated box, reducing the risk of plug-in failure, and improving product stability.

[0051] Specifically, the battery charging and distribution integrated box provided in this embodiment has a box body 100 made of hard plastic and is square in shape as a whole. The charging socket 200 is embedded in the side wall of the box body 100, one side is used to plug in the charging gun, and the other side is connected to the shunt relay 300. The shunt relay 300 is fixed in the box body 100 by bolts, and in this embodiment, two shunt relays 300 are provided. The shunt relay 300 is respectively connected to the positive and negative poles of the charging socket 200 through connectors such as copper sheets, and the output end of the shunt relay 300 is connected to the positive and negative poles of the battery pack through cables. Thus, the battery pack can be connected to the charging gun by controlling the opening and closing of the shunt relay 300. Since the charging socket 200 is directly arranged on the shell of the battery charging and distribution integrated box, it can be directly connected to the shunt relay 300, which avoids the need to set a long high-voltage cable between the charging socket 200 and the charging and distribution integrated box, thereby increasing heat loss. The output end of the shunt relay 300 can output two branches, namely, two positive branches and two negative branches, so as to share the high voltage current and further reduce the heat loss during the conduction process.

[0052] Furthermore, the battery charging and distribution integrated box also includes a power distribution control board 400 , which is electrically connected to the two shunt relays 300 respectively to control the opening and closing of the shunt relays 300 .

[0053] Specifically, the power distribution control board 400 is specifically configured as a rectangular circuit board, on which a control chip and a control circuit are provided, and a control program is stored in the control chip. The shunt relay 300 is connected to the power distribution control board 400 through a wire, so that the opening and closing of the shunt relay 300 can be controlled by the power distribution control board 400, thereby controlling whether the charging gun is connected to the battery pack to complete charging.

[0054] Preferably, the battery charging and distribution integrated box further includes a mounting bracket 410 , which is disposed in the accommodating cavity, and the power distribution control board 400 is fixed to a side of the mounting bracket 410 away from the shunt relay 300 .

[0055] Specifically, the mounting bracket 410 is configured as a rectangular flat plate, which is fixed in the receiving cavity by bolts. In this embodiment, the shunt relay 300 is arranged at the bottom of the box body 100, while the mounting bracket 410 is suspended, and the power distribution control board 400 is fixed to the top of the mounting bracket 410 by bolts. In this way, the power distribution control board 400 can be fixed by the mounting bracket 410, and the shunt relay 300 and the power distribution control board 400 can be separated by the mounting bracket 410 to avoid accidental contact between the two.

[0056] Furthermore, the battery charging and distribution integrated box also includes a low-voltage socket 500, which is arranged on the side wall of the box body 100, one end of the low-voltage socket 500 is connected to the power distribution control board 400, and the other end of the low-voltage socket 500 is used to connect to the power supply.

[0057] Specifically, the low voltage socket 500 is embedded in the side wall of the box body 100 and connected to the power distribution control board 400 through a wire. The low voltage socket 500 is provided with a power interface, which can be connected to the CAN power supply, and can not only supply power to the power distribution control board 400, but also transmit signals, so that the user can update the program of the power distribution control board 400.

[0058] Preferably, the power distribution control board 400 is provided with a remote communication module, which can transmit charging data remotely.

[0059] Specifically, the remote communication module is fixed on the power distribution control board 400 and is connected to the chip on the power distribution control board 400 through a circuit. The remote communication module can remotely transmit the data in the chip, so that the user can detect the charging status of the battery charging and distribution integrated box in real time and remotely control it.

[0060] Furthermore, the battery charging and distribution integrated box also includes a positive copper sheet 600 and a negative copper sheet 700, one end of the positive copper sheet 600 is connected to the positive pole of the charging socket 200, and the other end of the positive copper sheet 600 is connected to the shunt relay 300 connected to the positive pole of the charging socket 200, one end of the negative copper sheet 700 is connected to the negative pole of the charging socket 200, and the other end of the negative copper sheet 700 is connected to the shunt relay 300 connected to the negative pole of the charging socket 200.

[0061] Specifically, the two ends of the positive copper sheet 600 are respectively fixed to the positive electrode of the charging socket 200 and the shunt relay 300 by bolts, and correspondingly, the two ends of the negative copper sheet 700 are respectively fixed to the negative electrode of the charging socket 200 and another shunt relay 300 by bolts. Thus, the connection between the relay and the charging socket 200 is completed by replacing the wiring harness with the positive copper sheet 600 and the negative copper sheet 700, which can effectively reduce the heat loss of the wiring harness during high-current charging.

[0062] Preferably, the battery charging and distribution integrated box also includes a current transformer 800 , which is fixed in the shell, and the induction ring of the current transformer 800 is sleeved in the middle of the negative copper sheet 700 , and the current transformer 800 is connected to the power distribution control board 400 .

[0063] Specifically, the current transformer 800 is fixed to the bottom plate of the shell by bolts. The current transformer 800 is an instrument that converts a large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. It consists of a closed iron core and a winding. The primary winding has few turns and is connected in series in the circuit of the current to be measured, so it often has the entire current of the circuit flowing through it. The secondary winding has more turns and is connected in series in the measuring instrument and the protection circuit. When the current transformer 800 is working, its secondary circuit is always closed, so the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer 800 is close to a short circuit. In this embodiment, the induction ring of the current transformer 800 is set in the middle of the negative copper sheet 700 to detect the current in the negative copper sheet 700. At the same time, the current transformer 800 is connected to the distribution control board 400 through a wire, so that the detected data can be input into the distribution control board 400 and compared with the data collected by the accessory control board from the shunt relay 300 to determine the stable operation of the battery charging and distribution integrated box.

[0064] Furthermore, the charging socket 200 includes a socket body 210 and a socket protection cover 220 . The socket body 210 is fixed to the side wall of the box body 100 , and one side of the socket protection cover 220 is hinged to the socket body 210 so that the socket protection cover 220 can be buckled on the socket body 210 .

[0065] Specifically, in this embodiment, a circular through hole is provided on the side wall of the box body 100, and the socket body 210 is cylindrical and is fixed in the circular through hole. One side of the socket body 210 is connected to the positive copper sheet 600 and the negative copper sheet 700 by bolts respectively. A plug interface is provided on the other side of the socket body 210 for the charging gun to be plugged in. The socket protection cover 220 is circular as a whole, and a rotating shaft is provided on one side thereof, so as to be hinged to the socket body 210. When the socket protection cover 220 is rotated around the rotating shaft, it can be buckled on the socket body 210 to prevent dust and other debris from entering the plug interface, and also to prevent the plug interface from being accidentally touched, causing safety hazards.

[0066] Preferably, the charging socket 200 further includes a sealing strip, which is disposed in the gap between the socket body 210 and the box body 100 .

[0067] Specifically, the sealing strip is a rubber sealing strip, which is in a circular shape as a whole and fills the gap between the socket body 210 and the box body 100. By providing the sealing strip, the gap between the socket body 210 and the box body 100 can be effectively sealed to ensure the overall sealing of the battery charging and distribution integrated box, and prevent the battery charging and distribution integrated box from being short-circuited due to water ingress.

[0068] Furthermore, a plurality of charging sockets 200 are arranged at intervals on the side wall of the box body 100 , and a plurality of groups of shunt relays 300 are connected to the charging sockets 200 in a one-to-one correspondence.

[0069] Specifically, in this embodiment, two charging sockets 200 are provided, both of which are fixed on the side wall of the box body 100. Correspondingly, two groups of shunt relays 300 are also provided, which are respectively connected to the two charging sockets 200. In this way, the battery charging and distribution integrated box can be plugged with two charging guns at the same time, further improving the charging efficiency of the battery charging and distribution integrated box.

[0070] Furthermore, the battery charging and distribution integrated box further includes an output interface 900 , which is disposed on the outer wall of the box body 100 , and the output interfaces 900 are connected to a shunt relay 300 in groups of two.

[0071] Specifically, the output interface 900 is fixed to the outer wall of the box body 100 by bolts, and is connected to the shunt relay 300 in the box body 100. In the present embodiment, four output interfaces 900 are provided, of which two output interfaces 900 are connected to the two output ports of the shunt relay 300 connected to the positive copper sheet 600, and are connected to the positive pole of the battery pack as positive pole interfaces. The other two output interfaces 900 are connected to the two output ports of the shunt relay 300 connected to the negative copper sheet 700, and are connected to the negative pole of the battery pack as negative pole interfaces. Therefore, by arranging the output interface 900 outside the box body 100, the connection between the shunt relay 300 and the battery pack can be facilitated, and the shunt relay 300 is avoided from being exposed outside the box body 100, thereby ensuring the safety of the battery charging and distribution integrated box.

[0072] Preferably, the battery charging and distribution integrated box also includes a high-voltage cable, which is arranged in a one-to-one correspondence with the output interface 900, one end of the high-voltage cable is connected to the output interface 900, and the other end of the high-voltage cable is used to connect to the battery pack.

[0073] Specifically, the high-voltage cable is arranged at the outlet end of the output interface 900 and is formed integrally with the output interface 900, and includes from the inside to the outside: conductor, insulation, inner sheath, filler and outer insulation, copper or aluminum is used as the conductor material, and the insulation layer uses cross-linked polyethylene or oil paper insulation. Therefore, connecting the output interface 900 and the battery pack through the high-voltage cable can ensure the safety of the connection between the two.

[0074] The present invention also provides a high-current charging device for a vehicle, comprising a battery pack, a charging gun and the above-mentioned battery charging and distribution integrated box, wherein the battery pack is connected to a shunt relay 300, and the charging gun is connected to a charging interface.

[0075] That is, the present invention provides a high-current vehicle charging device, which is connected to the battery pack by setting the charging socket 200 in the box body 100 and directly connecting it to the shunt relay 300 without the need for wiring harness connection. This solves the technical problems in the prior art that when the automobile charging device is required to cope with high-current and high-voltage charging, the high-voltage cable generates severe heat, causing large heat loss, often resulting in varying degrees of damage or functional failure, and high maintenance costs. At the same time, two shunt relays 300 are set to shunt the high-voltage current, further reducing the heat loss of various components of the battery charging and distribution integrated box, reducing the risk of plug-in failure, and improving product stability.

[0076] The present invention also provides a car charging method, which is applied to the vehicle high-current charging device as mentioned above, and includes the following steps: supplying power to the distribution control board 400 through the low-voltage socket 500, and turning on the distribution control board 400; plugging in the charging gun, and checking the vehicle status through the current transformer 800; when the vehicle is in a chargeable state, sending a high-voltage command, closing the shunt relay 300, and when the vehicle is in a non-chargeable state, feeding back fault information.

[0077] Specifically, first, the power distribution control board 400 is powered by the low-voltage socket 500, and the power distribution control board 400 is turned on. At this time, the CAN charging connection signal can be transmitted through the low-voltage socket 500 to indicate the working status of the power distribution control board 400. At this time, the current sensor works to detect in real time whether there is current passing through the negative copper sheet 700. Then plug in the charging gun, and use the current sensor to sense whether there is current passing to determine whether the vehicle is in a rechargeable pile state. When the vehicle is in a rechargeable state, the system sends a high-voltage command, and the power distribution control board 400 closes the shunt relay 300. When the vehicle is in a non-rechargeable state, the fault information is fed back through the remote transmission module to alarm. In this way, the safety of car charging can be guaranteed.

[0078] Preferably, when the high voltage instruction is sent and the shunt relay 300 is closed, the automobile cooling module is turned on.

[0079] Specifically, when a high-voltage instruction is sent and the shunt relay 300 is closed, the charging gun is connected to the battery pack for charging, and the heat dissipation module of the car is turned on, thereby ensuring good heat dissipation during charging of the car and reducing safety hazards during charging.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery charging and distribution integrated box, characterized in that: include: A box body (100), wherein the box body (100) is hollow and has a receiving cavity; A charging socket (200), the charging socket (200) being arranged on a side wall of the box body (100), and the charging socket (200) being used to plug in a charging gun; A shunt relay (300), wherein two shunt relays (300) are arranged in a group in the accommodating cavity, wherein one end of one of the shunt relays (300) is connected to the positive pole of the charging socket (200), and the other end is used to connect to the positive pole of the battery pack, and another end of the shunt relay (300) is connected to the negative pole of the charging socket (200), and the other end is used to connect to the negative pole of the battery pack.

2. The battery charging and distribution integrated box according to claim 1, characterized in that: The battery charging and distribution integrated box further comprises a power distribution control board (400), wherein the power distribution control board (400) is electrically connected to the two shunt relays (300) respectively to control the opening and closing of the shunt relays (300).

3. The battery charging and distribution integrated box according to claim 2, characterized in that: The battery charging and distribution integrated box further comprises a mounting bracket (410), wherein the mounting bracket (410) is arranged in the accommodating cavity, and the power distribution control board (400) is fixed to a side of the mounting bracket (410) away from the shunt relay (300).

4. The battery charging and distribution integrated box according to claim 2, characterized in that: The battery charging and distribution integrated box further comprises a low-voltage socket (500), wherein the low-voltage socket (500) is arranged on a side wall of the box body (100), one end of the low-voltage socket (500) is connected to the power distribution control board (400), and the other end of the low-voltage socket (500) is used to connect to a power source.

5. The battery charging and distribution integrated box according to claim 2, characterized in that: The power distribution control board (400) is provided with a remote communication module, and the remote communication module can remotely transmit charging data.

6. The battery charging and distribution integrated box according to any one of claims 2 to 5, characterized in that: The battery charging and distribution integrated box further comprises a positive copper sheet (600) and a negative copper sheet (700), one end of the positive copper sheet (600) being connected to the positive electrode of the charging socket (200), and the other end of the positive copper sheet (600) being connected to the shunt relay (300) connected to the positive electrode of the charging socket (200), one end of the negative copper sheet (700) being connected to the negative electrode of the charging socket (200), and the other end of the negative copper sheet (700) being connected to the shunt relay (300) connected to the negative electrode of the charging socket (200).

7. The battery charging and distribution integrated box according to claim 6, characterized in that: The battery charging and distribution integrated box further comprises a current transformer (800), the current transformer (800) being fixed in the box body (100), the induction ring of the current transformer (800) being sleeved on the middle part of the negative copper sheet (700), and the current transformer (800) being connected to the power distribution control board (400).

8. The battery charging and distribution integrated box according to any one of claims 2 to 5, characterized in that: The charging socket (200) comprises a socket body (210) and a socket protection cover (220); the socket body (210) is fixed to the side wall of the box body (100); one side of the socket protection cover (220) is hinged to the socket body (210) so that the socket protection cover (220) can be buckled on the socket body (210).

9. The battery charging and distribution integrated box according to claim 8, characterized in that: The charging socket (200) further comprises a sealing strip, wherein the sealing strip is arranged in the gap between the socket body (210) and the box body (100).

10. The battery charging and distribution integrated box according to any one of claims 2 to 5, characterized in that: A plurality of the charging sockets (200) are arranged at intervals on the side wall of the box body (100), and a plurality of groups of the shunt relays (300) are connected to the charging sockets (200) in a one-to-one correspondence.

11. The battery charging and distribution integrated box according to any one of claims 2 to 5, characterized in that: The battery charging and distribution integrated box further comprises an output interface (900), wherein the output interface (900) is arranged on the outer wall of the box body (100), and the output interfaces (900) are connected to one of the shunt relays (300) in groups of two.

12. The battery charging and distribution integrated box according to claim 11, characterized in that: The battery charging and distribution integrated box also includes a high-voltage cable, which is arranged in a one-to-one correspondence with the output interface (900), one end of the high-voltage cable is connected to the output interface (900), and the other end of the high-voltage cable is used to connect to the battery pack.

13. A vehicle high current charging device, characterized in that: It comprises the battery pack, the charging gun and the battery charging and distribution integrated box as described in any one of claims 1 to 12, the battery pack is connected to the shunt relay (300), and the charging gun is connected to the charging socket (200).

14. A method for charging a car, characterized in that: The high-current vehicle charging device as claimed in claim 13 comprises: Step 1: supply power to the power distribution control board (400) through the low voltage socket (500) and turn on the power distribution control board (400); Step 2: plug in the charging gun and check the vehicle status through the current transformer (800); Step three, when the vehicle is in a chargeable state, send a command to close the shunt relay (300); when the vehicle is in a non-chargeable state, feedback fault information.

15. The vehicle charging method according to claim 14, characterized in that: When sending the instruction to close the shunt relay (300), the automobile cooling module is turned on.

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