Movable alternating-current and direct-current charging and discharging device supporting direct connection of power grid

Abstract

The invention discloses a movable alternating current and direct current charging and discharging device supporting direct connection of a power grid, and relates to the technical field of mobile charging, the movable alternating current and direct current charging and discharging device comprises a charging box body, the outer surface of the charging box body is fixedly connected with two socket modules, and the outer surface of the charging box body is fixedly connected with two take-up frames corresponding to the socket modules in position; the charging box body is fixedly connected with an interface module, the interface module is fixedly connected with a charging gun, the charging box body is rotatably connected with a door plate, and the door plate is fixedly connected with two display screens. A gap is reserved between every two battery boxes, so that heat dissipation of the storage batteries in the battery boxes can be guaranteed, the gap between the two battery boxes can also serve as a physical barrier, meanwhile, one storage battery is independently stored in each battery box, the situation that one storage battery discharges abnormally or is on fire and other storage batteries break down is avoided, and the service life of the storage batteries is prolonged. And the situation that a larger fire disaster is caused by the storage battery with other storage batteries after the storage battery breaks down is reduced, so that the safety of the storage battery in the using process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile charging, in particular to a mobile AC / DC charging and discharging device supporting power grid direct access. BACKGROUND

[0002] With the rapid development of new energy vehicle industry, the mobile AC / DC charging and discharging device as an emergency power supply, outdoor operation power supply and key equipment for new energy vehicle energy supplement, its application scenarios are increasingly widespread. The existing mobile charging and discharging device usually adopts integrated battery design, and realizes energy interaction between power grid and load through a unified charging and discharging management system. After discharging, the AC / DC charging and discharging device needs to be charged by the ground AC power grid.

[0003] The core problem of the existing mobile charging and discharging device is concentrated in the design defects of the battery cabin structure and operation and maintenance mechanism, which specifically manifests in two aspects: first, all batteries are stored in one battery cabin, and the series connection path is realized by the positive and negative poles of each battery. If one of the batteries is short-circuited or accidentally damaged, it will cause abnormal discharge or fire, which will in turn cause abnormal discharge or fire of other batteries. If the abnormal discharge or fire battery is the innermost one, the external batteries need to be removed one by one to avoid the spread of abnormal discharge or fire. If the abnormal discharge or fire battery is not removed in time, the mobile charging and discharging device will be burned. Second, the batteries in the existing mobile charging and discharging device adopt bolt or tool type disassembly design, so that the battery replacement needs to be operated by professional personnel, and the disassembly of a single battery takes several minutes, which seriously delays the equipment recovery time in the emergency power supply scene. SUMMARY

[0004] To solve the above technical problems, the present application provides a mobile AC / DC charging and discharging device supporting power grid direct access.

[0005] The technical scheme is as follows:

[0006] A mobile AC / DC charging and discharging device supporting power grid direct access, comprising a charging box body, two socket modules are fixedly connected to the outer surface of the charging box body, two take-up frames corresponding in position to the socket modules are fixedly connected to the outer surface of the charging box body, an interface module is fixedly connected to the charging box body, a charging gun is fixedly connected to the interface module, a door plate is rotatably connected to the charging box body, two display screens are fixedly connected to the door plate, two prompt lights are fixedly connected to the door plate, a switch button is fixedly connected to the door plate, four fixed rollers are fixedly installed at the four corners of the bottom of the charging box body, and a power-on assembly is arranged in the charging box body.

[0007] The power supply assembly comprises two fixed plates fixedly connected inside the charging box, and a plurality of battery boxes arranged in a linear array are fixedly connected to the ends of the two fixed plates away from each other, two conductive blocks are fixedly connected to the inner wall of each battery box near the fixed plate, a connecting wire is fixedly connected to each of the two fixed plates, the connecting wire is connected to the conductive block through the fixed plate, one storage battery is inserted into the inside of each battery box, and a conductive groove is formed in one end of each storage battery near the conductive block.

[0008] Further, the charging gun is composed of a cable and a gun body, wherein the cable of the charging gun is wound on one of the wire winding frames, and the gun body of the charging gun is inserted into the inside of one of the socket modules.

[0009] Further, the inside of the charging box is provided with a control panel, wherein the control panel is integrated with a charge-discharge conversion module, a bidirectional switching unit, a control system, a battery temperature control system and a power grid direct-through module, and the charge-discharge conversion module is divided into an AC / DC module and a DC / DC module.

[0010] Further, the two sides of each battery box are designed to be hollow, and a gap is left between every two battery boxes, and a plurality of support rods arranged in a linear array are fixedly connected to the ends of every two battery boxes away from the fixed plate, and a conductive sheet is arranged in the inside of the conductive groove wall.

[0011] Further, the several connecting wires at the top are connected with one of the conductive blocks in the two battery boxes respectively, the two connecting wires at the bottom are connected with the interface module away from the conductive block, and the storage battery adopts a 62.59KWh lithium iron phosphate power battery.

[0012] Further, the battery box is provided with a quick release assembly, the quick release assembly comprises two clamping holes formed in the end of each battery box away from the fixed plate, an active slot is formed in each storage battery, two clamping rods are slidably connected in the inside of the active slot, a slot is formed in the middle of each clamping rod, two limiting plates corresponding to the slots are fixedly connected in the inside of the active slot, the two limiting plates and the two slots are slidably connected, and a spring one is fixedly connected between the slot walls of the two limiting plates and the two slots.

[0013] Further, the quick release assembly further comprises two active holes one formed on the outer surface of the storage battery, each active hole one is communicated with the adjacent active slot, a handle is slidably connected in the two active holes one, an active hole two is formed on the outer surface of each storage battery, each active hole two is communicated with the inside of the adjacent active slot, an active pipe is fixedly connected to the surface of the handle near the storage battery, the handle and the active slot are fixedly connected with a spring two, and the spring two is located in the inside of the active pipe.

[0014] Further, the two clamping rods are provided with inclined surface one at the end far away from each other, and are provided with inclined surface two at the end close to each other, the handle is in the shape of a V, and the two ends of the handle are provided with inclined angles matched with the inclined surface two of the two clamping rods.

[0015] From the above, the beneficial effects of the movable AC / DC charging and discharging device supporting power grid direct access in the application are as follows:

[0016] By leaving a gap between every two battery boxes, the heat dissipation of the storage batteries in the battery boxes can be ensured, and the gap between the two battery boxes can also serve as a physical barrier. In addition, each battery box stores one storage battery separately, which can prevent abnormal discharge or fire of one storage battery from causing failure of other storage batteries, reduce the risk of a larger fire caused by failure of one storage battery, and improve the safety of the storage batteries during use.

[0017] By inserting the clamping rod into the inner part of the clamping hole, the storage battery can be locked in the inner part of the battery box, which ensures the stability of the storage battery after being inserted into the battery box, prevents the storage battery from being separated from the battery box due to bumps during transportation, ensures uninterrupted charging or discharging process, and ensures that the conductive groove on the storage battery is in close contact with the conductive block after locking, which reduces the contact resistance and avoids local heating, short circuit or reduced charging efficiency caused by poor contact during charging with the ground AC power grid or vehicle charging.

[0018] By no longer inserting the clamping rod into the clamping hole, the storage battery can be quickly disassembled. If the battery overheats, bulges or has other failures, the quick disassembly can allow the maintenance personnel to remove the abnormal storage battery in the first time, which can prevent the spread of the failure. In addition, if the charging box needs to be temporarily moved or transported, the quick disassembly of the storage battery can be individually carried, which can avoid the difficulty in carrying caused by the fixed storage battery. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic view of the overall components of the application;

[0020] Figure 2 It is a three-dimensional schematic view of the conductive block, storage battery, conductive groove and other components of the application;

[0021] Figure 3 It is a three-dimensional schematic view of the battery box and other components of the application;

[0022] Figure 4 It is a three-dimensional schematic view of the fixed plate, battery box and other components of the application;

[0023] Figure 5 It is a sectional three-dimensional schematic view of the overall components of the application;

[0024] Figure 6 It is a sectional three-dimensional schematic view of the overall components of the application; Figure 5Enlarged view of the component at A;

[0025] Figure 7 Schematic view of the component at A;

[0026] Figure 8 Schematic view of the component at A;

[0027] Figure 9 Schematic view of the component at A;

[0028] Figure 10 Schematic view of the component at A; Figure 9 Enlarged view of the component at B.

[0029] In the present application, the reference signs are as follows:

[0030] 1, charging box; 11, socket module; 12, take-up frame; 13, interface module; 14, charging gun; 2, door panel; 21, display screen; 22, prompt light; 23, switch button; 3, fixed roller;

[0031] Power-on assembly: 41, fixed plate; 42, battery box; 43, conductive block; 44, connecting wire; 45, storage battery; 46, conductive groove;

[0032] Quick-release assembly: 51, clamping hole; 52, movable slot; 53, clamping rod; 54, strip-shaped slot; 55, limiting plate; 56, spring one; 57, movable hole one; 58, handle; 59, movable hole two; 510, movable tube; 511, spring two. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0034] The embodiments provided by the present application will be described in detail below:

[0035] As Figure 1 , Figure 3 , Figure 7 and Figure 8As shown, a movable AC / DC charging and discharging device supporting power grid direct access, comprising a charging box 1, two socket modules 11 are fixedly connected to the outer surface of the charging box 1, two take-up reels 12 are fixedly connected to the outer surface of the charging box 1 corresponding to the position of the socket modules 11, an interface module 13 is fixedly connected to the charging box 1, a charging gun 14 is fixedly connected to the interface module 13, a door plate 2 is rotatably connected to the charging box 1, two display screens 21 are fixedly connected to the door plate 2, two prompt lights 22 are fixedly connected to the door plate 2, a switch button 23 is fixedly connected to the door plate 2, four fixed rollers 3 are fixedly installed at the bottom corners of the charging box 1, and a power-on assembly is arranged in the charging box 1.

[0036] It should be noted that the charging gun 14 is composed of a cable and a gun body, the cable of the charging gun 14 is wound on one of the take-up reels 12, the gun body of the charging gun 14 is inserted into one of the socket modules 11, and a control panel is arranged in the charging box 1, wherein the control panel is integrated with a charging and discharging conversion module, a bidirectional switching unit, a control system, a battery temperature control system, heating and cooling, and a power grid direct access module, wherein the charging and discharging conversion module is divided into an AC / DC module and a DC / DC module, the AC / DC module can perform conversion functions of AC power grid→AC / DC→device energy storage, AC power grid→AC / DC→power supply for DC equipment, and AC to DC conversion in power grid direct access, in addition, the DC / DC module can perform conversion functions of DC charging pile→DC / DC→device energy storage and device energy storage→DC / DC→power supply for DC equipment, the bidirectional switching unit is connected with the energy storage unit, the charging and discharging conversion module, and the power grid / load, and realizes bidirectional energy flow switching through the control system, during charging, the control system coordinates battery energy transmission, during discharging, the control system controls battery→load or power grid→load energy output, the control system takes a high-performance industrial controller as the core, integrates multiple types of sensors such as voltage, current, temperature, and position, and collects real-time device state data, the battery temperature control system intelligently starts and stops the heating / cooling system according to the real-time temperature of the battery, so as to ensure that the battery works in the appropriate interval of 25-40℃, the power grid direct access module is independent of the battery charging and discharging circuit, when the battery fails, is under maintenance, or has special needs such as short-time power supply for large loads, the power grid direct access module directly converts ground AC power grid energy into DC or maintains AC output through the AC / DC module to supply power for the load, realizes power grid and load "direct access", and ensures power supply continuity.

[0037] Specifically, for some vehicles that need emergency power supply outdoors, the staff can transport the charging box 1 through a truck or a forklift that can carry the charging box 1. When the charging box 1 is transported to the vicinity of the vehicle, the charging box 1 is lowered so that the fixed roller 3 is in contact with the ground. Then the staff can push the charging box 1 so that the charging box 1 rolls on the ground through the fixed roller 3 to move to adjust the position of the charging box 1 to supply power to the vehicle. Then the staff can first pull out the gun body of the charging gun 14 from the socket module 11, and then take off the cable of the charging gun 14 from the take-up rack 12. Then the gun body of the charging gun 14 is inserted into the charging port of the vehicle. Finally, after pressing the switch button 23, the overall equipment is started, that is, the circuit in the charging box 1 is turned on, and the vehicle is powered through the charging gun 14. In addition, the display screen 21 displays the capacity of the battery and the voltage of the current in real time. The above is only a description of one of the cases of charging the vehicle, and different power transmission charging modes are also described.

[0038] It should be noted that mode 1 AC power grid→AC / DC→device energy storage: the device is connected to the AC power grid, and the control system identifies that the power grid state is normal. The AC / DC module is started to convert AC power into DC power suitable for the battery. The BMS monitors the battery parameters in real time to regulate the charging current and power. The temperature control system starts and stops heating / cooling according to the environment and battery temperature to ensure safe and efficient charging of the battery.

[0039] Mode 2 DC charging pile→DC / DC→device energy storage: connect to a DC charging pile. The DC / DC module adapts to the high voltage and large current output parameters of the charging pile and converts them into a charging curve acceptable to the battery. The BMS cooperates with the monitoring to avoid overcharging. The temperature control system dynamically adjusts the cooling / heating according to the charging heat to ensure the stability of the battery during fast charging.

[0040] Mode 3 device energy storage→DC / DC→power supply for DC equipment: the control system receives the power supply demand of DC equipment and controls the bidirectional switching unit to connect the battery and the DC / DC module. The battery DC power is converted into a voltage and current parameter suitable for the equipment. The equipment power consumption is monitored in real time, and the output is dynamically adjusted to ensure stable power supply. The temperature control system cooperates with the regulation according to the change of the battery discharge temperature.

[0041] Mode 4 AC power grid→AC / DC→power supply for DC equipment: without relying on the battery, the AC / DC module directly converts the AC power grid power into DC to power the DC equipment. The control system monitors the power grid and equipment parameters to adapt the output power. If the power grid is abnormal, it can automatically switch to the battery power supply mode 3 or the power grid direct mode if the AC equipment is supported to ensure continuity.

[0042] The power grid direct mode can realize the battery failure, maintenance or load demand special, the control system switches the bidirectional switching unit, skips the battery link, and directly delivers the power grid power to the load through the AC / DC module or the adaptive alternating current output, realizes the direct mode of "power grid-load", and meets the emergency or special power supply demand.

[0043] As shown in Figures 1 to 9 The power supply assembly includes two fixed plates 41 fixedly connected inside the charging box 1. The ends of the two fixed plates 41 away from each other are fixedly connected with a plurality of battery boxes 42 arranged in a linear array. The inner wall of each battery box 42 near the fixed plate 41 is fixedly connected with two conductive blocks 43. The two fixed plates 41 are fixedly connected with connecting lines 44. The connecting lines 44 are connected with the conductive blocks 43 through the fixed plates 41. The inside of each battery box 42 is inserted with one storage battery 45. The end of each storage battery 45 near the conductive block 43 is provided with a conductive groove 46. The conductive block 43 is inserted into the inside of the conductive groove 46.

[0044] It should be noted that the two sides of each battery box 42 are hollow, and there is a gap between every two battery boxes 42. The ends of every two battery boxes 42 away from the fixed plate 41 are fixedly connected with a plurality of support rods arranged in a linear array. The inside of the groove wall of the conductive groove 46 is provided with a conductive sheet. After the conductive block 43 is inserted into the inside of the conductive groove 46, it can contact the conductive sheet inside the conductive block 43. The top several connecting lines 44 are connected with one of the conductive blocks 43 in the two battery boxes 42. The ends of the bottom two connecting lines 44 away from the conductive block 43 are connected with the interface module 13, that is, for connecting all the storage batteries 45 inserted into the battery box 42 in series, which can realize the power transmission to the interface module 13. The storage battery 45 adopts a 62.59KWh iron phosphate lithium power battery with high energy density and cycle life, and is matched with a battery management system BMS to monitor parameters such as voltage, current, SOC state of charge, SOH state of health, temperature and the like in real time, so as to provide data support for safe and efficient operation of the battery.

[0045] Specifically, before the above-mentioned power transmission through the charging gun 14, the storage battery 45 can be inserted into the inside of the battery box 42. Since the two sides of each battery box 42 are hollow, and there is a gap between every two battery boxes 42, the storage battery 45 can be cooled in the battery box 42, and the gap between the two battery boxes 42 can also serve as a physical barrier. At the same time, each battery box 42 stores one storage battery 45, which can prevent abnormal discharge or fire of one storage battery 45 from causing failure of other storage batteries 45, reduce the risk of larger fire caused by failure of the storage battery 45, and improve the safety of the storage battery 45 during use.

[0046] Further, when the battery 45 is inserted into the inside of the battery box 42, at this time, the conductive groove 46 on the battery 45 will be in contact with the conductive block 43 in the battery box 42, through the contact of the conductive block 43 and the conductive groove 46, and then the conductive block 43 is conductive, the conductive block 43 is charged at this time, and is conducted through the connecting line 44, the current between the plurality of batteries 45 forms a series circuit through the connecting line 44, and is connected in series with the interface module 13, and then the charging gun 14 is powered.

[0047] It should be noted that the above is only the series step of the battery 45, and the specific charging and other operations are mainly based on the operations in the foregoing.

[0048] As shown in Figure 3 , Figure 4 and Figure 10 , the battery box 42 is provided with a quick release assembly for locking and quickly disassembling the battery 45, the quick release assembly comprises two clamping holes 51 opened at one end of each battery box 42 away from the fixed plate 41, each battery 45 is provided with a movable groove 52, the movable groove 52 is slidably connected with two clamping rods 53, the middle part of the two clamping rods 53 is provided with a slot 54, the movable groove 52 is fixedly connected with two limiting plates 55 corresponding to the position of the slot 54, the two limiting plates 55 and the two slots 54 are slidably connected, the spring 56 is fixedly connected between the groove wall of the two limiting plates 55 and the two slots 54, the outer surface of the battery 45 is provided with two movable holes 157, each movable hole 157 is communicated with the adjacent movable groove 52, the two movable holes 157 are slidably connected with a handle 58, the outer surface of each battery 45 is provided with a movable hole 259, each movable hole 259 is communicated with the inside of the adjacent movable groove 52, the surface of the handle 58 close to the battery 45 is fixedly connected with a movable pipe 510, the movable pipe 510 slides in the inside of the movable hole 259, the handle 58 and the groove wall of the movable groove 52 are fixedly connected with a spring 511, and the spring 511 is located in the inside of the movable pipe 510.

[0049] It should be noted that the two clamping rods 53 are provided with inclined surfaces one away from each other, which can abut against the battery box 42 and retract into the inside of the movable groove 52 during the process of inserting the battery 45 into the inside of the battery box 42, and the two clamping rods 53 are provided with inclined surfaces two close to each other, the handle 58 is in the shape of a V, the two ends of the handle 58 are provided with inclined angles matched with the inclined surfaces two of the two clamping rods 53, the handle 58 can push the inclined surfaces two of the clamping rods 53 through the inclined angles, so that the clamping rods 53 move to both sides in the inside of the movable groove 52, the inclined angles of the handle 58 are in abutment with the inclined surfaces two of the clamping rods 53, so that the clamping rods 53 can stretch the spring 156 through the slot 54.

[0050] Specifically, when the above-mentioned worker inserts the battery 45 into the battery 45 for installation, the worker needs to hold the handle 58, and then the carrying work of the battery 45 can be realized. When the battery 45 moves horizontally in the inside of the battery box 42, at this time, the inclined surface one of the clamping rod 53 in the movable slot 52 will be in contact with the side wall of the battery box 42, and after the inclined surface one of the clamping rod 53 is limited by the battery box 42, it will enter the inside of the clamping rod 53. The clamping rod 53 will push and squeeze the handle 58 through the inclined surface two, so that the handle 58 moves outward in the inside of the movable hole one 57. The handle 58 drives the movable pipe 510 to move outward synchronously in the inside of the movable hole two 59, and at the same time, the handle 58 also stretches the spring two 511. In addition, the movement of the clamping rod 53 will make the spring one 56 contract for a short distance. When the battery 45 is completely inserted into the inside of the battery box 42, that is, the clamping rod 53 coincides with the position of the clamping hole 51, under the elastic reset action of the spring two 511, the handle 58 moves inward in the inside of the movable hole one 57. The inclined angle of the handle 58 will push and squeeze the inclined surface two of the clamping rod 53, so that the clamping rod 53 moves to both sides in the inside of the movable slot 52. The movement of the clamping rod 53 will further stretch the spring one 56 for a short distance. At this time, the clamping rod 53 will be inserted into the inside of the clamping hole 51. At this time, the battery 45 can be locked in the inside of the battery box 42, which ensures the stability of the battery 45 after being inserted into the inside of the battery box 42, avoids the battery 45 and the battery box 42 from being separated due to bumps during transportation, ensures that the charging or discharging process is not interrupted, and after locking, the conductive groove 46 on the battery 45 and the conductive block 43 are in close contact, which reduces the contact resistance and avoids the charging device from causing local heating, short circuit or charging efficiency reduction due to poor contact when charging with the ground AC power grid or vehicle.

[0051] In addition, when it is necessary to remove the battery 45, at this time, the handle 58 can be pulled to make the handle 58 move outward in the inside of the movable hole one 57. The handle 58 will drive the movable pipe 510 to move outward in the inside of the movable hole two 59. At the same time, the handle 58 will also stretch the spring two 511. At this time, the inclined angle of the handle 58 will no longer be in contact with the inclined surface two of the clamping rod 53, that is, the handle 58 will no longer push and squeeze the clamping rod 53. Under the elastic reset action of the spring one 56, the clamping rod 53 moves to the middle of the movable slot 52 in the inside of the movable slot 52. The clamping rod 53 is no longer inserted into the clamping hole 51. At this time, the worker can pull the handle 58 again to drive the battery 45 to move outward in the inside of the battery box 42 through the cooperation of the handle 58 and the movable pipe 510, that is, the quick disassembly operation of the battery 45 can be completed. If the battery overheats, bulges or other faults occur, quick disassembly can allow the operation and maintenance personnel to remove the abnormal battery 45 in the first time to avoid the spread of faults such as fire risk. In addition, when the charging box 1 needs to be temporarily moved or transported, the battery 45 can be quickly disassembled for separate carrying, which avoids the difficulty of carrying caused by the fixation of the battery 45.

[0052] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A portable AC / DC charging and discharging device supporting direct grid connection, comprising a charging housing (1), two socket modules (11) fixedly connected to the outer surface of the charging housing (1), two cable trays (12) corresponding to the positions of the socket modules (11) fixedly connected to the outer surface of the charging housing (1), an interface module (13) fixedly connected to the charging housing (1), a charging gun (14) fixedly connected to the interface module (13), a door panel (2) rotatably connected to the charging housing (1), two display screens (21) fixedly connected to the door panel (2), two indicator lights (22) fixedly connected to the door panel (2), and a switch button (23) fixedly connected to the door panel (2), characterized in that, Four fixed rollers (3) are fixedly installed at the four corners of the bottom of the charging box (1), and a power supply component is installed inside the charging box (1). The power supply assembly includes two fixed plates (41) fixedly connected inside the charging box (1). At the ends of the two fixed plates (41) that are far apart from each other, multiple battery boxes (42) are fixedly connected in a linear array. Each battery box (42) has two conductive blocks (43) fixedly connected to the inner wall of the side near the fixed plate (41). A connecting wire (44) is fixedly connected to both fixed plates (41). The connecting wire (44) passes through the fixed plate (41) and connects to the conductive block (43). Each battery box (42) has a battery (45) inserted inside. Each battery (45) has a conductive groove (46) opened at the end near the conductive block (43). The conductive block (43) is inserted into the conductive groove (46).

2. The portable AC / DC charging and discharging device supporting grid connection according to claim 1, characterized in that, The charging gun (14) consists of a cable and a gun body, wherein the cable of the charging gun (14) is wound on one of the cable take-up frames (12), and the gun body of the charging gun (14) is inserted into the interior of one of the socket modules (11).

3. The portable AC / DC charging and discharging device supporting grid connection according to claim 1, characterized in that, The charging box (1) is equipped with a control panel, which integrates a charge / discharge conversion module, a bidirectional switching unit, a control system, a battery temperature control system (heating + cooling) and a grid connection module. The charge / discharge conversion module is divided into an AC / DC module and a DC / DC module.

4. The portable AC / DC charging and discharging device supporting grid connection according to claim 1, characterized in that, Each battery box (42) has a hollow design on both sides, and there is a gap between each two battery boxes (42). Each two battery boxes (42) are fixedly connected to a number of support rods arranged in a linear array at the end away from the fixing plate (41). The conductive groove (46) has conductive sheets inside its groove wall.

5. The portable AC / DC charging and discharging device supporting grid connection according to claim 1, characterized in that, Several connecting wires (44) at the top are connected to one of the conductive blocks (43) in the two battery boxes (42), and the two connecting wires (44) at the bottom are connected to the interface module (13) at the end away from the conductive block (43). The battery (45) is a 62.59KWh lithium iron phosphate power battery.

6. The portable AC / DC charging and discharging device supporting grid connection according to claim 1, characterized in that, The battery box (42) is provided with a quick-release assembly, which includes two locking holes (51) opened at the end of each battery box (42) away from the fixing plate (41). Each battery (45) is provided with a movable groove (52). Two locking rods (53) are slidably connected inside each movable groove (52). A strip groove (54) is opened in the middle of each of the two locking rods (53). Two limiting plates (55) corresponding to the position of the strip groove (54) are fixedly connected inside each movable groove (52). The two limiting plates (55) are slidably connected to the two strip grooves (54). A spring (56) is fixedly connected between the two limiting plates (55) and the groove wall of the two strip grooves (54).

7. The portable AC / DC charging and discharging device supporting grid connection according to claim 6, characterized in that, The quick-release assembly also includes two movable holes (57) on the outer surface of the battery (45), each movable hole (57) is connected to a nearby movable groove (52), and a handle (58) is slidably connected in the two movable holes (57). Each battery (45) has a movable hole (59) on its outer surface, and each movable hole (59) is connected to the interior of a nearby movable groove (52). A movable tube (510) is fixedly connected to the surface of the handle (58) near the battery (45), and the movable tube (510) slides inside the movable hole (59). A spring (511) is fixedly connected between the handle (58) and the groove wall of the movable groove (52), and the spring (511) is located inside the movable tube (510).

8. The portable AC / DC charging and discharging device supporting grid connection according to claim 6, characterized in that, The ends of the two levers (53) that are far apart from each other are both set with a first slope, and the ends of the two levers (53) that are close to each other are both set with a second slope. The handle (58) is U-shaped, and both ends of the handle (58) are set with an angle that matches the second slope of the two levers (53).

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