Charging and discharging battery pack system, movable battery pack storage bin equipment and charging station

Abstract

The embodiment of the invention discloses a charging and discharging battery pack system, movable battery pack storage bin equipment and a charging station. In the charging and discharging battery pack system, each battery pack is connected with a plurality of main loop terminals on a battery high-low voltage junction box, and is electrically connected with an interface unit through a main loop; the interface unit comprises at least four charging sockets and at least two power conversion connector sockets; when the charging and discharging battery pack system is in a discharging state, each battery pack is communicated with each power conversion connector socket through the main loop, and supplies power to electric equipment through the power conversion connector; when the charging and discharging battery pack system is in a charging state, each battery pack is communicated with each charging socket through the main loop, and the charging power supply is communicated with the main loop through the charging sockets to charge the charging and discharging battery pack system. The technical problems of low charging speed, long charging waiting time and low energy complementing efficiency of a charging and discharging battery pack system in the prior art are solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of charging and discharging batteries, and in particular to a charging and discharging battery pack system, a movable battery pack storage bin device, and a charging station. Background Art

[0002] In recent years, new energy sources have gradually been applied to mining trucks, but the operating environment of mining trucks is often in remote areas, where charging and battery replacement are inconvenient. Therefore, mobile battery replacement devices have emerged. Mobile battery replacement devices can realize flexible movement of battery replacement stations by setting the battery pack system and battery replacement equipment on trailers.

[0003] However, in the existing mobile battery exchange device, there is no charging compartment on the trailer, and the battery pack system cannot be charged through the charging compartment like in a fixed battery exchange station. It can only be charged through two direct charging ports by a charging gun. The charging speed is slow, the charging waiting time is long, and the energy replenishment efficiency is low. Summary of the invention

[0004] The embodiments of the present invention provide a charging and discharging battery pack system, a movable battery pack storage bin device and a charging station, which solve the technical problems of slow charging speed, long charging waiting time and low energy replenishment efficiency of the charging and discharging battery pack system in the prior art.

[0005] An embodiment of the present invention provides a charging and discharging battery pack system, the charging and discharging battery pack system comprising at least four battery packs, an interface unit, a battery high and low voltage junction box, and a battery replacement connector;

[0006] A plurality of battery packs are connected in parallel, and a plurality of single cells are connected in series to form a battery pack, and the battery packs are electrically connected to the battery high and low voltage junction box through the interface unit, wherein each battery pack is connected to a plurality of main circuit terminals provided on the battery high and low voltage junction box, and is electrically connected to the interface unit through the main circuit;

[0007] The interface unit includes at least four charging sockets and at least two battery replacement connector sockets;

[0008] When the charging and discharging battery pack system is in a discharging state, each of the battery packs is connected to each of the power-changing connector sockets through the main circuit, and supplies power to the electrical equipment through the power-changing connector;

[0009] When the charge-discharge battery pack system is in a charging state, each of the battery packs is connected to each of the charging sockets via the main circuit, and the charging power source charges the charge-discharge battery pack system via the charging socket through the main circuit.

[0010] Further, the battery high and low voltage junction box is provided with a plurality of battery total connection terminals, and the plurality of battery total connection terminals at least include a first battery total positive terminal, a second battery total positive terminal, a third battery total positive terminal, a fourth battery total positive terminal, a first battery total negative terminal, a second battery total negative terminal, a third battery total negative terminal, and a fourth battery total negative terminal;

[0011] The battery high and low voltage junction box is also provided with an MSD unit and a relay unit;

[0012] The positive end of each of the battery main connection terminals of the battery high and low voltage junction boxes is connected to the positive end of each of the battery packs according to the numbering sequence, and the negative end of each of the battery main connection terminals of the battery high and low voltage junction boxes is connected to the negative end of each of the battery packs according to the numbering sequence;

[0013] All positive terminals in the battery main terminal are electrically connected to the main circuit terminal in sequence through the MSD unit and the relay unit.

[0014] Furthermore, the main circuit connection terminal includes at least three main circuit positive terminals, three main circuit negative terminals, two DC charging positive terminals and two DC charging negative terminals;

[0015] The relay unit includes a main circuit positive relay, a main circuit negative relay, a pre-charge relay, a pre-charge resistor, two DC charging positive relays, two DC charging negative relays and a water-cooled positive relay;

[0016] The positive ends of the three main circuits are connected in parallel and electrically connected to the MSD unit through the main circuit positive relay, pre-charging resistor and pre-charging relay; the pre-charging resistor is connected in series with the pre-charging relay and then connected in parallel with the main circuit positive relay;

[0017] One of the DC charging positive terminals is electrically connected to the MSD unit via one of the DC charging positive relays; two of the DC charging positive relays and the water-cooled positive relay are connected in parallel;

[0018] The negative terminals of the three main circuits are connected in parallel and electrically connected to the negative terminal of the battery main connection terminal through the main circuit negative relay;

[0019] One of the DC charging negative terminals is electrically connected to the negative terminal of the battery main terminal through one of the DC charging negative relays.

[0020] Further, the MSD unit includes a first positive electrode MSD, a second positive electrode MSD, a third positive electrode MSD, a fourth positive electrode MSD and a fifth positive electrode MSD, and the rear ends of each positive electrode MSD are connected in parallel.

[0021] Furthermore, the battery high and low voltage junction box is also provided with a vehicle low voltage terminal, a first low voltage output terminal, a second low voltage output terminal, a first low voltage input terminal, and a second low voltage input terminal;

[0022] The first low-voltage output terminal is electrically connected to the positive terminal of the battery box of the first battery in the first battery group; the first low-voltage input terminal is electrically connected to the negative terminal of the battery box of the last battery in the second battery group; the second low-voltage output terminal is electrically connected to the positive terminal of the battery box of the first battery in the third battery group; the second low-voltage input terminal is electrically connected to the negative terminal of the battery box of the last battery in the fourth battery group.

[0023] Furthermore, the charging and discharging battery pack system also includes a combiner box;

[0024] The combiner box is arranged between the battery high and low voltage junction box and the interface unit;

[0025] In the combiner box, the first positive terminal of the first power-changing connector socket is electrically connected to the positive terminal of the first main circuit, and the first negative terminal of the first power-changing connector socket is electrically connected to the negative terminal of the first main circuit; the second positive terminal of the first power-changing connector socket is electrically connected to the positive terminal of the second main circuit, and the second negative terminal of the first power-changing connector socket is electrically connected to the negative terminal of the second main circuit; the second positive terminal of the second power-changing connector socket is electrically connected to the positive terminal of the third main circuit, and the second negative terminal of the second power-changing connector socket is electrically connected to the negative terminal of the third main circuit;

[0026] The right end of the positive terminal of the first main circuit and the positive terminal of the second main circuit connected in parallel is electrically connected to the left end of the positive terminals of the first charging socket, the second charging socket, the third charging socket, and the fourth charging socket connected in parallel; the right end of the negative terminal of the first main circuit and the negative terminal of the second main circuit are electrically connected to the left end of the negative terminals of the first charging socket, the second charging socket, the third charging socket, and the fourth charging socket connected in parallel; the positive terminal of the third main circuit is electrically connected to the negative terminal of the third main circuit.

[0027] Furthermore, the charging and discharging battery pack system further includes a main water cooling unit, a secondary water cooling unit, a first expansion water tank and a second expansion water tank;

[0028] The high-voltage positive terminal of the main water-cooling unit and the high-voltage positive terminal of the slave water-cooling unit are respectively connected to the battery high- and low-voltage junction boxes, and are connected in parallel to the MSD unit through a water-cooled positive relay. The high-voltage negative terminal of the main water-cooling unit and the high-voltage negative terminal of the slave water-cooling unit are respectively connected to the battery high- and low-voltage junction boxes, and are connected in parallel to the negative terminals of the battery main terminal;

[0029] The first expansion water tank is electrically connected to the main water cooling unit, the second expansion water tank is electrically connected to the slave water cooling unit, the main water cooling unit is connected to the low-voltage end of the vehicle of the battery high and low voltage junction box; the main water cooling unit is electrically connected to the interface unit; the main water cooling unit is electrically connected to the slave water cooling unit.

[0030] An embodiment of the present invention further provides a movable battery pack storage bin device, the movable battery pack storage bin device comprising a plurality of battery pack storage bins, the battery pack storage bins being used to store the charging and discharging battery pack system described in any of the above embodiments;

[0031] A battery pack storage bin device has at least seven direct charging ports, each of which includes four DC charging sockets.

[0032] Furthermore, the movable battery pack storage bin device also includes a driving device; and a plurality of the battery pack storage bins are arranged on the driving device.

[0033] An embodiment of the present invention further provides a charging station, which includes a plurality of movable battery pack storage bin devices described in any of the above embodiments, and is used to charge the charging and discharging battery pack systems stored in the movable battery pack storage bin devices.

[0034] The embodiment of the present invention discloses a charging and discharging battery pack system, a movable battery pack storage bin device and a charging station. The charging and discharging battery pack system includes at least four battery packs, an interface unit and a battery high and low voltage junction box; each battery pack is connected to a plurality of main circuit terminals arranged on the battery high and low voltage junction box, and is electrically connected to the interface unit through the main circuit; the interface unit includes at least four charging sockets and at least two power exchange connector sockets; when the charging and discharging battery pack system is in a discharging state, each battery pack is connected to each power exchange connector socket through the main circuit, and supplies power to the electrical equipment through the power exchange connector; when the charging and discharging battery pack system is in a charging state, each battery pack is connected to each charging socket through the main circuit, and the charging power source charges the charging and discharging battery pack system through the charging socket through the main circuit. This application solves the technical problems of slow charging speed, long charging waiting time and low energy replenishment efficiency of the charging and discharging battery pack system in the prior art by setting at least four charging sockets and charging and discharging the battery pack system through the main circuit, and achieves the technical effect of improving the charging speed and energy replenishment efficiency of the charging and discharging battery pack system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a structural diagram of a charging and discharging battery pack system provided by an embodiment of the present invention;

[0036] Figure 2 is a structural diagram of a battery high and low voltage junction box provided by an embodiment of the present invention;

[0037] Figure 3 It is a schematic diagram of connecting a battery pack and a battery high and low voltage junction box provided by an embodiment of the present invention;

[0038] Figure 4 is a structural diagram of a power replacement connector socket provided in an embodiment of the present invention;

[0039] Figure 5 is an internal circuit diagram of a combiner box provided by an embodiment of the present invention;

[0040] Figure 6 is a schematic diagram of a discharge circuit of a rechargeable battery system provided by an embodiment of the present invention;

[0041] Figure 7 is a schematic diagram of a charging circuit of a rechargeable battery system provided by an embodiment of the present invention;

[0042] Figure 8 It is a structural diagram of a charging socket provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0044] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to limit a specific order. The following embodiments of the present invention can be implemented separately, or in combination with each other, and the embodiments of the present invention do not impose specific limitations on this.

[0045] Figure 1 It is a structural diagram of a charging and discharging battery pack system provided in an embodiment of the present invention.

[0046] like Figure 1 As shown, the charging and discharging battery pack system includes at least four battery packs 10, an interface unit 20, a battery high and low voltage junction box 30 and a battery replacement connector ( Figure 1 No illustration of the battery replacement connector is given in the figure);

[0047] Multiple battery packs 10 are connected in parallel, and multiple single cells are connected in series to form a battery pack. For example, Figure 1A schematic diagram of a charging and discharging battery pack system having four battery packs 10 is given, each battery pack 10 being formed by four batteries connected in series, and each battery pack 10 is electrically connected to a battery high and low voltage junction box 30 through an interface unit 20, wherein each battery pack 10 is connected to a plurality of main circuit terminals 311 provided on the battery high and low voltage junction box 30, and is electrically connected to the interface unit 20 through the main circuit; the interface unit 20 includes at least four charging sockets and at least two battery replacement connector sockets.

[0048] When the charging and discharging battery pack system is in the discharging state, each battery pack 10 is connected to each power exchange connector socket through the main circuit, and supplies power to the electrical equipment through the power exchange connector; when the charging and discharging battery pack system is in the charging state, each battery pack 10 is connected to each charging socket through the main circuit, and the charging power supply ( Figure 1 The charging power source is not shown in the figure) and the charging and discharging battery pack system is charged through the charging socket through the main circuit.

[0049] Specifically, the charging and discharging battery pack system is provided with at least four charging sockets, and four charging guns simultaneously charge the charging and discharging battery pack system through the four charging sockets through the main circuit. The charging current through each charging socket is 228A, and the total current charged through the main circuit is 912A, thereby charging the charging and discharging battery pack system with a large current, greatly improving the charging speed. According to the capacity of the battery pack 10, the charging time is usually only one hour, which effectively shortens the charging waiting time. It should be noted that in order to improve the charging efficiency, each charging socket works simultaneously to charge the charging and discharging battery pack system during charging.

[0050] In addition, the main circuit is the circuit of the electrical equipment on the vehicle where the battery pack system is located. When the battery pack system needs to be charged, the main circuit is reused to charge the battery pack system, which not only reduces the layout of dedicated charging lines, but also improves charging efficiency.

[0051] The present application solves the technical problems of slow charging speed, long charging waiting time and low energy replenishment efficiency of the charging and discharging battery pack system in the prior art by providing at least four charging sockets and using the main circuit as a charging and discharging battery pack system, thereby achieving the technical effect of improving the charging speed and energy replenishment efficiency of the charging and discharging battery pack system.

[0052] Figure 2 It is a structural diagram of a battery high and low voltage junction box provided by an embodiment of the present invention. Figure 3 It is a schematic diagram of the connection between the battery pack and the battery high and low voltage junction boxes provided by an embodiment of the present invention.

[0053] See also Figure 3In order to distinguish the four battery packs 10, they are named as the first battery pack 10 (including battery box 1-T01, battery box 2-T02, battery box 3-T03, battery box 4-T04), the second battery pack 10 (including battery box 5-T05, battery box 6-T06, battery box 7-T07, battery box 8-T08), the third battery pack 10 (including battery box 9-T09, battery box 10-T10, battery box 11-T11, battery box 12-T12), and the fourth battery pack 10 (including battery box 13-T13, battery box 14-T14, battery box 15-T15, battery box 16-T16). Among them, the battery box of each battery includes a positive terminal of the battery box, a negative terminal of the battery box, a CAN low-voltage input terminal, and a CAN low-voltage output terminal. The second battery box in the first battery pack 10 is also provided with an MSD with insurance, while the first battery box, the third battery box, and the fourth battery box are provided with an MSD without insurance.

[0054] like Figure 3 As shown, in the first battery pack 10, the negative end of the electric box 1-T01 is connected to the positive end of the electric box 2-T02, the negative end of the electric box 2-T02 is connected to the positive end of the electric box 3-T03, and the negative end of the electric box 3-T03 is connected to the positive end of the electric box 4-T04; the CAN low-voltage output end of the electric box 1-T01 is connected to the CAN low-voltage input end of the electric box 2-T02, the CAN low-voltage output end of the electric box 2-T02 is connected to the CAN low-voltage input end of the electric box 3-T03, and the CAN low-voltage output end of the electric box 3-T03 is connected to the CAN low-voltage input end of the electric box 4-T04. Similarly, the structures of the other three battery packs 10 are the same as the first battery pack 10.

[0055] The positive ends of the four battery packs 10 are respectively connected to the total positive terminal of the battery set on the battery high and low voltage junction box 30, and the negative ends of the four battery packs 10 are respectively connected to the total negative terminal of the battery set on the battery high and low voltage junction box 30. The CAN low-voltage output end and the CAN low-voltage input end in the four battery packs 10 are connected in series to form a CAN low-voltage path. The charging current of the four battery packs 10 is 228A.

[0056] Alternatively, if Figure 2 and Figure 3 As shown, a plurality of battery total connection terminals are arranged on the battery high and low voltage junction box 30, and the plurality of battery total connection terminals at least include a first battery total positive terminal 301, a second battery total positive terminal 302, a third battery total positive terminal 303, a fourth battery total positive terminal 304, a first battery total negative terminal 305, a second battery total negative terminal 306, a third battery total negative terminal 307, and a fourth battery total negative terminal 308; an MSD (Maintenance Switch Disconnector) unit 309 and a relay unit 310 are also arranged inside the battery high and low voltage junction box.

[0057] See also Figure 2 , the positive terminals of the battery total connection terminals of the battery high and low voltage junction box 30 are connected to the positive terminals of the battery packs 10 according to the numbering sequence, and the negative terminals of the battery total connection terminals of the battery high and low voltage junction box 30 are connected to the negative terminals of the battery packs 10 according to the numbering sequence. Specifically, the first battery total positive terminal 301 is electrically connected to the positive terminal of the first battery pack 10, and the first battery total negative terminal 305 is electrically connected to the negative terminal of the first battery pack 10; the second battery total positive terminal 302 is electrically connected to the positive terminal of the second battery pack 10, and the second battery total negative terminal 306 is electrically connected to the negative terminal of the second battery pack 10; the third battery total positive terminal 303 is electrically connected to the positive terminal of the third battery pack 10, and the third battery total negative terminal 307 is electrically connected to the negative terminal of the third battery pack 10; the fourth battery total positive terminal 304 is electrically connected to the positive terminal of the fourth battery pack 10, and the fourth battery total negative terminal 308 is electrically connected to the negative terminal of the fourth battery pack 10.

[0058] All positive terminals in the battery main terminal are electrically connected to the main circuit terminal 311 through the MSD unit 309 and the relay unit 310 in sequence.

[0059] Optionally, the main circuit connection terminal 311 includes at least three main circuit positive terminals, three main circuit negative terminals, two DC charging positive terminals and two DC charging negative terminals.

[0060] For example, see Figure 2 The main circuit connection terminal 311 includes a first main circuit positive terminal 40, a second main circuit positive terminal 41, a third main circuit positive terminal 42, a first main circuit negative terminal 43, a second main circuit negative terminal 44, a third main circuit negative terminal 45, a first DC charging positive terminal 46, a second DC charging positive terminal 47, a first DC charging negative terminal 48 and a second DC charging negative terminal 49.

[0061] The relay unit 310 includes a main circuit positive relay 50, a main circuit negative relay 51, a pre-charging relay 52, a pre-charging resistor 53, two DC charging positive relays (represented in the figure as a first DC charging positive relay 54 and a second DC charging positive relay 55), two DC charging negative relays (represented in the figure as a first DC charging negative relay 56 and a second DC charging negative relay 57) and a water-cooled positive relay 58.

[0062] After the positive ends of the three main circuits are connected in parallel, they are electrically connected to the MSD unit 309 through the main circuit positive relay 50, the pre-charging resistor 53, and the pre-charging relay 52; after the pre-charging resistor 53 is connected in series with the pre-charging relay 52, it is connected in parallel with the main circuit positive relay 50.

[0063] A DC charging positive terminal is electrically connected to the MSD unit 309 through a DC charging positive relay; two DC charging positive relays and a water-cooled positive relay 58 are connected in parallel. Figure 2 , the first DC charging positive terminal 46 is electrically connected to the MSD unit 309 through the first DC charging positive relay 54; the second DC charging positive terminal 47 is electrically connected to the MSD unit 309 through the second DC charging positive relay 55; the first DC charging positive relay 54, the second DC charging positive relay 55, and the water-cooled positive relay 58 are connected in parallel;

[0064] The negative terminals of the three main circuits are connected in parallel and electrically connected to the negative terminal of the battery main terminal through the main circuit negative relay 51; a DC charging negative terminal is electrically connected to the negative terminal of the battery main terminal through a DC charging negative relay. Figure 2 After the first main circuit negative terminal 43, the second main circuit negative terminal 44, and the third main circuit negative terminal 45 are connected in parallel, they are electrically connected to the negative terminal in the battery main terminal through the main circuit negative relay 51; the first DC charging negative terminal 48 is electrically connected to the negative terminal in the battery main terminal through the first DC charging negative relay 56; the second DC charging negative terminal 49 is electrically connected to the negative terminal in the battery main terminal through the second DC charging negative relay 57.

[0065] Specifically, by controlling the on / off of the charging circuit and the on / off of the discharging circuit through the relays in the relay unit 310 , the occurrence of safety hazards such as overcurrent and fire can be effectively reduced.

[0066] Alternatively, if Figure 2 As shown, the MSD unit 309 includes a first positive MSD (ie Figure 2 The positive electrode MSD1 shown in FIG. 1 ), the second positive electrode MSD (ie Figure 2 The positive electrode MSD2 shown in FIG. 2 ), the third positive electrode MSD (ie Figure 2 The positive electrode MSD3 shown in FIG. 3), the fourth positive electrode MSD (ie Figure 2 The positive electrode MSD4 shown in FIG. 4) and the fifth positive electrode MSD (ie Figure 2 The positive electrode MSD5 shown in the figure, the rear ends of each positive electrode MSD are connected in parallel.

[0067] Alternatively, if Figure 2 As shown, the battery high and low voltage junction box 30 is also provided with a vehicle low voltage terminal 61 , a first low voltage output terminal 62 , a second low voltage output terminal 63 , a first low voltage input terminal 64 , and a second low voltage input terminal 65 .

[0068] The first low voltage output terminal 62 is connected to the positive terminal of the battery box 1-T01 of the first battery in the first battery group 10 (i.e. Figure 3The first low voltage input terminal 64 is electrically connected to the negative terminal of the last battery of the second battery pack 10 (i.e., the CAN low voltage input of the electric box 1-T01 shown in FIG. 1 ); the first low voltage input terminal 64 is electrically connected to the negative terminal of the electric box 8-T08 of the last battery of the second battery pack 10 (i.e., Figure 3 The second low-voltage output terminal 63 is electrically connected to the positive terminal of the first battery of the third battery pack 10 (i.e., the positive terminal of the CAN low-voltage output of the electric box 8-T08 shown in FIG. 1 ); Figure 3 The second low voltage input terminal 64 is electrically connected to the negative terminal of the last battery of the fourth battery pack 10 (i.e., the CAN low voltage input of the electric box 9-T09 shown in FIG. 1 ); the second low voltage input terminal 64 is electrically connected to the negative terminal of the electric box 16-T16 of the last battery of the fourth battery pack 10 (i.e., Figure 3 CAN low voltage output of the electrical box 16-T16 shown in the electrical connection.

[0069] Figure 4 It is a structural diagram of the power replacement connector socket provided in an embodiment of the present invention.

[0070] Alternatively, if Figure 4 As shown, the first power-changing connector socket 21 is provided with a fixing structure 211, a guide structure 212, a sealing structure 213, a spring structure ( Figure 4 The first power-swap connector socket 21 is a square structure with six screw holes 2110. The first power-swap connector socket 21 is fixed to the charging and discharging battery pack system through the screw holes 2110. The guide structure 212 is provided with two metal grooves. The guide structure 212 is used to ensure that the plug of the power-swap connector is correctly inserted into the power-swap connector socket and remains connected. The sealing structure 213 includes a sealing ring. The sealing structure 213 is used to prevent dust and water. The spring structure is used to ensure that the power-swap connector plug and the power-swap connector socket maintain good contact. The second power-swap connector socket 22 is consistent with the first power-swap connector socket 21. The stable connection between the power-swap connector socket and the power-swap connector plug can effectively reduce the occurrence of safety hazards.

[0071] Figure 5 It is an internal circuit diagram of a combiner box provided in an embodiment of the present invention.

[0072] Alternatively, if Figure 1 As shown, the charging and discharging battery pack system further includes a combiner box 70 ; the combiner box 70 is disposed between the battery high and low voltage junction box 30 and the interface unit 20 .

[0073] like Figure 4 and Figure 5As shown, in the combiner box 70, the first positive terminal 215 of the first power exchange connector socket 21 is electrically connected to the positive terminal 40 of the first main circuit, and the first negative terminal 216 of the first power exchange connector socket 21 is electrically connected to the negative terminal 43 of the first main circuit; the second positive terminal 217 of the first power exchange connector socket 21 is electrically connected to the positive terminal 41 of the second main circuit, and the second negative terminal 218 of the first power exchange connector socket 21 is electrically connected to the negative terminal 44 of the second main circuit; the second positive terminal 217 of the second power exchange connector socket 22 is electrically connected to the positive terminal 42 of the third main circuit, and the second negative terminal 218 of the second power exchange connector socket 22 is electrically connected to the negative terminal 45 of the third main circuit;

[0074] The right end of the first main circuit positive terminal 40 and the second main circuit positive terminal 41 connected in parallel is electrically connected to the left end of the positive terminals of the first charging socket 23, the second charging socket 24, the third charging socket 25, and the fourth charging socket 26 connected in parallel; the right end of the first main circuit negative terminal 43 and the second main circuit negative terminal 44 connected in parallel is electrically connected to the left end of the negative terminals of the first charging socket 23, the second charging socket 24, the third charging socket 25, and the fourth charging socket 26 connected in parallel; the third main circuit positive terminal 42 is electrically connected to the third main circuit negative terminal 45.

[0075] Alternatively, if Figure 1 As shown, the charging and discharging battery pack system also includes a main water cooling unit 81, a slave water cooling unit 82, a first expansion water tank 83 and a second expansion water tank 84;

[0076] The high-voltage positive terminal of the main water-cooling unit 81 and the high-voltage positive terminal of the slave water-cooling unit 82 are respectively connected to the battery high-voltage and low-voltage junction boxes 30, and are connected in parallel to the MSD unit 309 through the water-cooled positive relay 58. The high-voltage negative terminal of the main water-cooling unit 81 and the high-voltage negative terminal of the slave water-cooling unit 82 are respectively connected to the battery high-voltage and low-voltage junction boxes 30, and are connected in parallel to the negative terminals of the battery main terminal;

[0077] The first expansion water tank 83 is electrically connected to the main water cooling unit 81, the second expansion water tank 84 is electrically connected to the slave water cooling unit 82, the main water cooling unit 81 is connected to the vehicle low-pressure end 61 of the battery high and low voltage junction box 30; the main water cooling unit 81 is electrically connected to the interface unit 20; the main water cooling unit 81 is electrically connected to the slave water cooling unit 82.

[0078] Figure 6 Schematic diagram of a discharge circuit of a rechargeable battery system provided in an embodiment of the present invention.

[0079] Specifically, Figure 2 and 6As shown, when the charging and discharging battery pack system is discharging on the driving equipment, the main circuit positive relay 50 and the main circuit negative relay 51 are closed, the pre-charging relay 52 is disconnected, the first DC charging positive relay 54, the second DC charging positive relay 55, the first DC charging negative relay 56 and the second DC charging negative relay 57 are disconnected; inside the combiner box 70, the first positive terminal 215 of the first power exchange connector socket 21 is connected to the first main circuit positive terminal 40, and the first negative terminal 216 of the first power exchange connector socket 21 is connected to the first main circuit negative terminal 43; the second positive terminal 217 of the first power exchange connector socket 21 is connected to the second main circuit positive terminal 41, and the second negative terminal 218 of the first power exchange connector socket 21 is connected to the second main circuit negative terminal 44; the second positive terminal 217 of the second power exchange connector socket 22 is connected to the third main circuit positive terminal 42, and the second negative terminal 218 of the second power exchange connector socket 22 is connected to the third main circuit negative terminal 45, forming a discharge circuit.

[0080] When discharging is required, the first power exchange connector socket 21 is connected to the first power exchange connector plug, and the first power exchange connector plug is connected to the energy storage PCS (Power Conversion System, energy storage inverter), where the PCS is used to control the charging and discharging process of the battery and perform AC / DC conversion; the second power exchange connector socket 22 is connected to the second power exchange connector plug, and the second power exchange connector plug is connected to the energy storage PCS.

[0081] Figure 7 Schematic diagram of a charging circuit of a rechargeable battery system provided in an embodiment of the present invention.

[0082] Specifically, Figure 2 and 7 As shown, when the charging and discharging battery pack system is charged on the movable battery pack storage bin device, the main circuit positive relay 50 and the main circuit negative relay 51 are closed, the pre-charging relay 52 is closed, and the first DC charging positive relay 54, the second DC charging positive relay 55, the first DC charging negative relay 56 and the second DC charging negative relay 57 are disconnected; inside the junction box 70, the right end of the first main circuit positive terminal 40 and the second main circuit positive terminal 41 in parallel are connected to the left end of the positive terminals of the first charging socket 23, the second charging socket 24, the third charging socket 25 and the fourth charging socket 26 in parallel; the right end of the first main circuit negative terminal 43 and the second main circuit negative terminal 44 in parallel are connected to the left end of the negative terminals of the first charging socket 23, the second charging socket 24, the third charging socket 25 and the fourth charging socket 26 in parallel; the third main circuit positive terminal 42 is connected to the third main circuit negative terminal 45 to form a charging circuit.

[0083] When charging is required, the first charging socket 23, the second charging socket 24, the third charging socket 25 and the fourth charging socket 26 are connected to the energy storage PCS through the charging plug, and then connected to the charging power source.

[0084] Figure 8 It is a structural diagram of a charging socket provided in an embodiment of the present invention.

[0085] Alternatively, if Figure 8 As shown, the first charging socket 23 includes a fixing structure 231, a protective shell 232, a sealing structure 233 and a charging component 234; four screw holes 2310 are provided on the fixing structure 231, and the fixing structure 231 fixes the first charging socket 23 on the charging and discharging battery pack system by passing bolts through the screw holes 2310. The protective shell 232 is connected to the fixing structure 231 through a hinge device 235 with threads. The protective shell 232 is circular and is used to protect the charging component 234. The sealing structure 233 is arranged inside the protective shell 232, and the material of the sealing structure 233 is insulating rubber.

[0086] The charging assembly 234 includes a DC positive terminal jack DC+, a DC negative terminal jack DC-, an A positive terminal jack A+, an A negative terminal jack A-, a GND terminal jack GND, an S positive terminal jack S+, and an S negative terminal jack S-; the first charging socket 23 is connected to the charging plug through the DC positive terminal jack DC+, the DC negative terminal jack DC-, the A positive terminal jack A+, the A negative terminal jack A-, the GND terminal jack GND, the S positive terminal jack S+, and the S negative terminal jack S-. The second charging socket 24, the third charging socket 25, and the fourth charging socket 26 have the same structure as the first charging socket 23; the charging rated current of the first charging socket 23, the second charging socket 24, the third charging socket 25, and the fourth charging socket 26 are all 228A.

[0087] An embodiment of the present invention further provides a movable battery pack storage bin device, which includes a plurality of battery pack storage bins, and the battery pack storage bins are used to store the charging and discharging battery pack system in any of the above embodiments.

[0088] A battery pack storage compartment device has at least seven direct charging ports, each of which contains four DC charging sockets.

[0089] Optionally, the movable battery pack storage bin device also includes a driving device; and a plurality of battery pack storage bins are arranged on the driving device.

[0090] Specifically, the movable battery pack storage bin device is provided with multiple battery pack storage bins, each battery pack storage bin device is provided with at least seven direct charging ports, each direct charging port includes four DC charging sockets, so that the charging and discharging battery pack system placed in the battery pack storage bin can be charged through the four DC charging sockets.

[0091] It should be noted that the movable battery pack storage warehouse equipment is used to centrally store the charging and discharging battery pack systems on new energy vehicles (such as mining vehicles) in remote areas where charging and battery replacement cannot be carried out, and transport them to the charging power source. The charging and discharging battery pack systems can then be charged directly using the direct charging port without the need for secondary movement.

[0092] The removable battery pack storage bin device provided in the embodiment of the present invention is used to store the charging and discharging battery pack system in the above embodiment. Therefore, the removable battery pack storage bin device provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0093] An embodiment of the present invention also provides a charging station, characterized in that the charging station includes multiple movable battery pack storage bin devices in any of the above embodiments, and the charging station is used to charge the charging and discharging battery pack system stored in the movable battery pack storage bin devices.

[0094] The charging station provided in the embodiment of the present invention includes the movable battery pack storage bin device in the above embodiment. Therefore, the charging station provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0095] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0096] Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A charging and discharging battery pack system, characterized in that: The charging and discharging battery pack system includes at least four battery packs, an interface unit, a battery high and low voltage junction box, and a battery replacement connector; A plurality of battery packs are connected in parallel, and a plurality of single cells are connected in series to form a battery pack. The battery packs are electrically connected to the battery high and low voltage junction boxes through an interface unit, wherein each battery pack is connected to a plurality of main circuit terminals provided on the battery high and low voltage junction boxes, and is electrically connected to the interface unit through the main circuit; The interface unit includes at least four charging sockets and at least two battery replacement connector sockets; When the charging and discharging battery pack system is in a discharging state, each of the battery packs is connected to each of the power-changing connector sockets through the main circuit, and supplies power to the electrical equipment through the power-changing connector; When the charge-discharge battery pack system is in a charging state, each of the battery packs is connected to each of the charging sockets via the main circuit, and the charging power source charges the charge-discharge battery pack system via the charging socket through the main circuit.

2. The charging and discharging battery pack system according to claim 1, characterized in that: The battery high and low voltage junction box is provided with a plurality of battery total connection terminals, and the plurality of battery total connection terminals at least include a first battery total positive terminal, a second battery total positive terminal, a third battery total positive terminal, a fourth battery total positive terminal, a first battery total negative terminal, a second battery total negative terminal, a third battery total negative terminal, and a fourth battery total negative terminal; The battery high and low voltage junction box is also provided with an MSD unit and a relay unit; The positive end of each of the battery main connection terminals of the battery high and low voltage junction boxes is connected to the positive end of each of the battery packs according to the numbering sequence, and the negative end of each of the battery main connection terminals of the battery high and low voltage junction boxes is connected to the negative end of each of the battery packs according to the numbering sequence; All positive terminals in the battery main terminal are electrically connected to the main circuit terminal in sequence through the MSD unit and the relay unit.

3. The charging and discharging battery pack system according to claim 2, characterized in that: The main circuit connection terminal includes at least three main circuit positive terminals, three main circuit negative terminals, two DC charging positive terminals and two DC charging negative terminals; The relay unit includes a main circuit positive relay, a main circuit negative relay, a pre-charge relay, a pre-charge resistor, two DC charging positive relays, two DC charging negative relays and a water-cooled positive relay; The positive ends of the three main circuits are connected in parallel and electrically connected to the MSD unit through the main circuit positive relay, pre-charging resistor and pre-charging relay; the pre-charging resistor is connected in series with the pre-charging relay and then connected in parallel with the main circuit positive relay; One of the DC charging positive terminals is electrically connected to the MSD unit through one of the DC charging positive relays; two of the DC charging positive relays and the water-cooled positive relay are connected in parallel; The negative terminals of the three main circuits are connected in parallel and electrically connected to the negative terminal of the battery main connection terminal through the main circuit negative relay; One of the DC charging negative terminals is electrically connected to the negative terminal of the battery main terminal through one of the DC charging negative relays.

4. The charging and discharging battery pack system according to claim 2, characterized in that: The MSD unit comprises a first positive electrode MSD, a second positive electrode MSD, a third positive electrode MSD, a fourth positive electrode MSD and a fifth positive electrode MSD, and the rear ends of each positive electrode MSD are connected in parallel.

5. The charging and discharging battery pack system according to claim 2, characterized in that: The battery high and low voltage junction box is also provided with a vehicle low voltage terminal, a first low voltage output terminal, a second low voltage output terminal, a first low voltage input terminal, and a second low voltage input terminal; The first low-voltage output terminal is electrically connected to the positive terminal of the battery box of the first battery in the first battery group; the first low-voltage input terminal is electrically connected to the negative terminal of the battery box of the last battery in the second battery group; the second low-voltage output terminal is electrically connected to the positive terminal of the battery box of the first battery in the third battery group; the second low-voltage input terminal is electrically connected to the negative terminal of the battery box of the last battery in the fourth battery group.

6. The charging and discharging battery pack system according to claim 3, characterized in that: The charging and discharging battery pack system also includes a combiner box; The combiner box is arranged between the battery high and low voltage junction box and the interface unit; In the combiner box, the first positive terminal of the first power-changing connector socket is electrically connected to the positive terminal of the first main circuit, and the first negative terminal of the first power-changing connector socket is electrically connected to the negative terminal of the first main circuit; the second positive terminal of the first power-changing connector socket is electrically connected to the positive terminal of the second main circuit, and the second negative terminal of the first power-changing connector socket is electrically connected to the negative terminal of the second main circuit; the second positive terminal of the second power-changing connector socket is electrically connected to the positive terminal of the third main circuit, and the second negative terminal of the second power-changing connector socket is electrically connected to the negative terminal of the third main circuit; The right end of the positive terminal of the first main circuit and the positive terminal of the second main circuit connected in parallel is electrically connected to the left end of the positive terminals of the first charging socket, the second charging socket, the third charging socket, and the fourth charging socket connected in parallel; the right end of the negative terminal of the first main circuit and the negative terminal of the second main circuit are electrically connected to the left end of the negative terminals of the first charging socket, the second charging socket, the third charging socket, and the fourth charging socket connected in parallel; the positive terminal of the third main circuit is electrically connected to the negative terminal of the third main circuit.

7. The charging and discharging battery pack system according to claim 5, characterized in that: The charging and discharging battery pack system also includes a main water cooling unit, a slave water cooling unit, a first expansion water tank and a second expansion water tank; The high-voltage positive terminal of the main water-cooling unit and the high-voltage positive terminal of the slave water-cooling unit are respectively connected to the battery high- and low-voltage junction boxes, and are connected in parallel to the MSD unit through a water-cooled positive relay. The high-voltage negative terminal of the main water-cooling unit and the high-voltage negative terminal of the slave water-cooling unit are respectively connected to the battery high- and low-voltage junction boxes, and are connected in parallel to the negative terminals of the battery main terminal; The first expansion water tank is electrically connected to the main water cooling unit, the second expansion water tank is electrically connected to the slave water cooling unit, the main water cooling unit is connected to the low-voltage end of the vehicle of the battery high and low voltage junction box; the main water cooling unit is electrically connected to the interface unit; the main water cooling unit is electrically connected to the slave water cooling unit.

8. A removable battery pack storage device, characterized in that: The movable battery pack storage bin device comprises a plurality of battery pack storage bins, and the battery pack storage bins are used to store the charging and discharging battery pack system according to any one of claims 1 to 7 above; A battery pack storage bin device has at least seven direct charging ports, each of which includes four DC charging sockets.

9. The movable battery pack storage bin device according to claim 8, characterized in that: The movable battery pack storage bin device also includes a driving device; a plurality of the battery pack storage bins are arranged on the driving device.

10. A charging station, characterized in that: The charging station comprises a plurality of movable battery pack storage bin devices as described in any one of claims 8 to 9 above, and the charging station is used to charge the charging and discharging battery pack systems stored in the movable battery pack storage bin devices.

Images