A mobile energy storage system suitable for pure electric mobile service vehicles

Abstract

The present invention relates to a mobile energy storage system suitable for a pure electric mobile service vehicle, comprising an MCC main control module, an EPS module, an energy storage component, a mains input interface, a mains output interface, a DC interface and a charging interface. The EPS module is communicatively connected to the MCC main control module, and the energy storage component is communicatively connected to the MCC main control module. The energy storage component is a battery module, comprising a first battery module used as a power supply, a second battery module used as an auxiliary power supply and a third battery module used as a DC power supply. The mobile energy storage system is provided with an EPS mode switch K2, a charging switch K3, an inverter switch K4 and a DC charging switch K5, one end of the EPS mode switch K2, the charging switch K3, the inverter switch K4 and the DC charging switch K5 are all electrically connected to the MCC main control module 1, and the other end is electrically connected to the positive pole of the third battery module.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, and in particular to a mobile energy storage system suitable for a pure electric mobile service vehicle. Background Art

[0002] At present, daily emergency power generation of base stations uses traditional fuel generators, and inspection and maintenance use fuel vehicles. However, with the improvement of the environmental protection concept of the whole society, the use of pure electric mobile service vehicles has gradually increased. Pure electric mobile service vehicles can replace fuel vehicles for inspection and maintenance, and pure electric mobile service vehicles can be used for emergency silent power generation of communication base stations. Therefore, pure electric mobile service vehicles can meet the use needs of the communications industry, and pure electric mobile service vehicles can provide temporary emergency power supply in urban areas, large residential areas, highway service areas, holiday and tourist areas, etc. Pure electric mobile service vehicles can also meet the charging needs of electric vehicles in emergency situations. Pure electric mobile service vehicles generally have the following functions: 1. Mobile function; 2. Fast charging function; 3. Mains access function.

[0003] The pure electric mobile service vehicle uses advanced battery charging and discharging technology, which enables it to have functions such as mobile service (which can be widely used in emergency silent charging of communication base stations, inspection and maintenance of daily vehicles), mobile power replenishment (charging electric vehicles), and mobile tool vehicles (loading goods).

[0004] In order to improve the applicability and application scope of a pure electric mobile service vehicle, the present invention provides a mobile energy storage system suitable for a pure electric mobile service vehicle. Summary of the invention

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mobile energy storage system suitable for a pure electric mobile service vehicle, comprising a control component, an energy storage component, a DC interface, a charging interface, an EPS module, a mains input interface and a mains output interface.

[0006] The energy storage component is the battery module, and the control component is the MCC main control module.

[0007] The mobile energy storage system is provided with an EPS mode switch K2, a charging switch K3, an inverter switch K4 and a DC charging switch K5, and the operator can touch the above switches, and the operator can put the mobile energy storage system into different working modes by controlling the on and off of the above switches, so that it can be applied to different usage scenarios. The present invention is described according to the specific usage scenarios of the mobile energy storage system:

[0008] 1. The mobile energy storage system is connected to the mains and loads separately

[0009] When the mobile energy storage system is connected to the mains and the load respectively, the operator controls the EPS mode switch K2 to close, and the mobile energy storage system is in the "EPS power supply mode".

[0010] The AC power is electrically connected to the mobile energy storage system through the AC power input interface. The AC power output interface of the mobile energy storage system is used to electrically connect the load. The AC power is directly output to the load through the mobile energy storage system. The AC power input interface is electrically connected to the EPS module through switch Q4, and the AC power output interface is electrically connected to the EPS module through switch Q3. Switch Q4 is electrically connected to the MCC main control module through the second switch detection module, and switch Q3 is electrically connected to the MCC main control module through the first switch detection module. The EPS module and the MCC main control module are in communication connection.

[0011] The energy storage component is a battery module, including a first battery module used as a power source and a second battery module used as an auxiliary power source. The energy storage component is communicatively connected to the MCC main control module. The first battery module is electrically connected to the DC input terminal of the inverter M1. An AC contactor KM1 is provided between the positive output terminal of the first battery module and the inverter M1. An AC contactor KM2 is provided between the negative output terminal of the first battery module and the inverter M1. The AC output terminal of the inverter M1 is electrically connected to the AC input terminal of the inverter M2 and the EPS module through the switch Q2. The AC contactor KM1 and the AC contactor KM2 are both electrically connected to the MCC main control module to form a contactor control and feedback loop. The DC input terminal of the inverter M1 is electrically connected to the MCC main control module.

[0012] In one embodiment, a fuse FU1 is provided between the AC contactor KM1 and the inverter M1, and a fuse FU2 is provided between the AC contactor KM2 and the inverter M1. The fuse FU1 and the fuse FU2 are both electrically connected to the MCC main control module to form a fast-blow feedback circuit.

[0013] In the EPS power supply mode, the MCC main control module controls the start-up of the EPS module, and the EPS module detects in real time whether the connected AC power is input normally through the AC input interface: when the EPS module detects that the AC power input is normal, the EPS module feeds back to the MCC main control module, and the MCC main control module controls the closure of switches Q4 and Q3 through the first switch detection module and the second switch detection module respectively, and the AC power is output to supply power to the load; when the EPS module detects that the AC power input is abnormal, the EPS module feeds back to the MCC main control module, and the MCC main control module controls the switch Q4 to be disconnected through the first switch detection module, and the EPS module controls the switch Q2 to be closed. At this time, the first battery module is converted into AC power through the inverter M1 and then supplies power to the load through the EPS module; when the EPS module detects that the AC power resumes normal input, the EPS module feeds back to the MCC main control module, and the MCC main control module controls the switch Q4 to be closed through the first switch detection module, and the EPS module controls the switch Q2 to be disconnected, and the mobile energy storage system automatically switches back to the AC power output to supply power to the load.

[0014] 2. The mobile energy storage system is connected to the mains and the pure electric mobile service vehicle

[0015] When the mobile energy storage system is electrically connected to the mains and the pure electric mobile service vehicle, the operator controls the charging switch K3 to close, and the mobile energy storage system is in "charging mode".

[0016] The mobile energy storage system is electrically connected to the on-board power supply of the pure electric mobile service vehicle through a DC interface, and the DC interface is electrically connected to the DC input terminal of the inverter M2 through a switch Q1.

[0017] In the charging mode, after the AC power is normally connected through the AC power input interface, when the EPS module detects that the AC power input is normal, the EPS module feeds back to the MCC main control module, and the MCC main control module controls the switch Q4 to be closed through the first switch detection module, and the EPS module controls the switch Q2 to be closed, and the MCC main control module controls the DC input end of the inverter M2 to be connected, and the MCC main control module controls the AC contactor KM1 and the AC contactor KM2 to be closed, and the MCC main control module controls the DC input end of the inverter M2 to be connected. At this time, the mobile energy storage system is in the "charging mode", and the AC power is converted into DC power by the inverter M1 to charge the energy storage component, and the AC power is converted into DC power by the inverter M2 to charge the on-board power pack of the pure electric mobile service vehicle. When charging the on-board power supply of the pure electric mobile service vehicle, the BMS of the on-board power supply monitors the battery cell voltage and SOC value of the on-board power supply in real time. The BMS communicates with the MCC main control module through the CAN bus. When the highest cell voltage or SOC value reaches the protection set value, the BMS sends information to the MCC main control module. The MCC main control module controls the DC input terminal of the inverter M2 to disconnect, thereby stopping charging the on-board power supply.

[0018] If the operator controls the EPS mode switch K2 and the charging switch K2 to close at the same time, the mobile energy storage system is in the "EPS power supply mode" and "charging mode" at the same time, and the mains connected to the energy storage system will charge the load and the vehicle power pack at the same time. The mains output will give priority to the load, and the remaining power will be used to charge the vehicle power supply.

[0019] 3. Mobile energy storage system is connected to load and pure electric mobile service vehicle respectively

[0020] The mobile energy storage system is electrically connected to the load and the pure electric mobile service vehicle. The operator controls the inverter switch K4 to close. At this time, the mobile energy storage system is in "inverter power supply mode".

[0021] In the inverter power supply mode, the on-board power supply of the pure electric mobile service vehicle inputs DC power to the mobile energy storage system through the DC interface, and then converts it into AC power through the inverter M2, and then supplies power to the load through the EPS module.

[0022] 4. Mobile energy storage system connected to electric vehicles

[0023] The mobile energy storage system is provided with a charging interface, which is used to electrically connect the electric vehicle. After the electric vehicle is electrically connected to the mobile energy storage system, the operator controls the DC charging switch K5 to close. At this time, the mobile energy storage system is in "DC rescue charging mode".

[0024] The energy storage component also includes a third battery module used as a DC power supply, and the third battery module is used to power the electric vehicle.

[0025] In the DC rescue charging mode, the third battery module of the energy storage component is electrically connected to the charging interface through the switch K1, the positive electrode of the third battery module is connected to the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected to the charging interface. The diode D1 is used to ensure the unidirectional flow of current. The electric vehicle is electrically connected to the electric vehicle for communication. The mobile energy storage system is electrically connected to the electric vehicle. The electric vehicle will first establish a communication connection with the third battery module to determine whether the charging interface and the communication protocol are compatible. At the same time, the electric vehicle and the MCC main control module establish a communication connection. The third battery module supplies power to the electric vehicle through the charging interface.

[0026] In the mobile energy storage system, the second battery module is used as an auxiliary power supply. The second battery module is electrically connected to the PDU power interface of the MCC main control module through the DC / DC converter to power the MCC main control module. An intermediate relay KA1 is provided between the positive electrode of the second battery module and the DC / DC converter, and an intermediate relay KA2 is provided between the negative electrode of the second battery module and the DC / DC converter. The MCC main control module and the DC / DC converter are connected in communication. Intermediate relay KA1 and intermediate relay KA2 are both connected to the MCC main control module by wires to form a contactor control and feedback loop.

[0027] In the DC rescue charging mode, the positive electrode of the second battery module is electrically connected to the positive electrode of the diode D2 through the intermediate relay KA1 and the intermediate relay KA3, the negative electrode of the diode D2 is connected to the charging interface, and the negative electrode of the second battery module is electrically connected to the charging interface. The diode D2 is used to ensure the unidirectional flow of current. The intermediate relay KA3 is electrically connected to the MCC main control module, and the intermediate relay KA3 is connected to the MCC main control module by wire to form a contactor control and feedback loop. The mobile energy storage system is electrically connected to the electric vehicle, and the electric vehicle and the MCC main control module establish a communication connection. At this time, the MCC main control module controls the intermediate relay KA3 to close, and the second battery module supplies power to the electric vehicle through the charging interface.

[0028] In the DC rescue charging mode, the second battery module and the third battery module are connected in parallel to provide DC fast charging for the electric vehicle, so the mobile energy storage system can quickly charge the electric vehicle in an emergency.

[0029] The present invention provides a mobile energy storage system suitable for a pure electric mobile service vehicle, which improves the applicability and application scope of the pure electric mobile service vehicle. The mobile energy storage system can achieve the following functions:

[0030] 1. The mobile energy storage system is connected to the mains to supply power to the load equipment;

[0031] 2. The mobile energy storage system uses the onboard power supply of a pure electric mobile service vehicle;

[0032] 3. The mobile energy storage system is connected to the mains to charge the pure electric mobile service vehicle;

[0033] 4. The mobile energy storage system provides DC output to electric vehicles for rescue charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0035] Figure 1 A circuit diagram of a mobile energy storage system suitable for a pure electric mobile service vehicle provided by one embodiment of the present invention.

[0036] Among them, in the attached Figure 1 The dotted lines in the figure are communication connection lines, the thick solid lines are conductive connection lines, and the thin solid lines are sampling and control connection lines. DETAILED DESCRIPTION

[0037] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In the description of the present invention, it should be noted that, 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, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] like Figure 1 As shown in the figure, an embodiment of the present invention provides a mobile energy storage system suitable for a pure electric mobile service vehicle, including an MCC main control module 1, an EPS module 2, an energy storage component, a mains input interface 4, a mains output interface 5, a DC interface 6 and a charging interface 7.

[0042] The energy storage component is a battery module, including a first battery module used as a power source, a second battery module used as an auxiliary power source, and a third battery module used as a DC power source.

[0043] The mobile energy storage system is provided with an EPS mode switch K2, a charging switch K3, an inverter switch K4 and a DC charging switch K5. The operator sets the working mode of the mobile energy storage system by controlling the on and off of the above switches. One end of the EPS mode switch K2, the charging switch K3, the inverter switch K4 and the DC charging switch K5 are electrically connected to the MCC main control module 1, and the other end is electrically connected to the positive pole of the DC power supply.

[0044] The mobile energy storage system is provided with a mains input interface 4 and a mains output interface 5. The mains is electrically connected to the mobile energy storage system through the mains input interface 4, and the mains output interface 5 of the mobile energy storage system is used to electrically connect the load. The mains input interface 4 is electrically connected to the EPS module 2 through the switch Q4, and the mains output interface 5 is electrically connected to the EPS module 2 through the switch Q3. The switch Q4 is electrically connected to the MCC main control module 1 through the second switch detection module 32, and the switch Q3 is electrically connected to the MCC main control module 1 through the first switch detection module 31. The EPS module 2 and the MCC main control module 1 are in communication connection.

[0045] The energy storage component is connected to the MCC main control module 1 in communication, the first battery module is electrically connected to the DC input end of the inverter M1, an AC contactor KM1 is provided between the positive output end of the first battery module and the inverter M1, an AC contactor KM2 is provided between the negative output end of the first battery module and the inverter M1, and the AC output end of the inverter M1 is electrically connected to the AC input end of the inverter M2 and the EPS module 2 through the switch Q2. The AC contactor KM1 and the AC contactor KM2 are both connected to the MCC main control module 1 by wires to form a contactor control and feedback loop. The DC input end of the inverter M1 is electrically connected to the MCC main control module 1. A fuse FU1 is provided between the AC contactor KM1 and the inverter M1, and a fuse FU2 is provided between the AC contactor KM2 and the inverter M1. The fuse FU1 and the fuse FU2 are both connected to the MCC main control module 1 by wires to form a fast-fuse feedback circuit.

[0046] The mobile energy storage system is electrically connected to the onboard power supply of the pure electric mobile service vehicle through the DC interface 6, and the DC interface 6 is electrically connected to the DC input terminal of the inverter M2 through the switch Q1.

[0047] The third battery module of the energy storage component is electrically connected to the charging interface 7 through the switch K1, the positive electrode of the third battery module is connected to the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected to the charging interface 7. The diode D1 is used to ensure the unidirectional flow of current. The electric vehicle is electrically connected to the electric vehicle for communication. The mobile energy storage system is electrically connected to the electric vehicle. The electric vehicle will first establish a communication connection with the third battery module to determine whether the charging interface and the communication protocol are compatible. At the same time, the electric vehicle and the MCC main control module 1 establish a communication connection. The third battery module supplies power to the electric vehicle through the charging interface 7.

[0048] In the mobile energy storage system, the second battery module is used as an auxiliary power source. The second battery module is electrically connected to the PDU power interface of the MCC main control module 1 through the DC / DC converter to power the MCC main control module 1. An intermediate relay KA1 is provided between the positive electrode of the second battery module and the DC / DC converter, and an intermediate relay KA2 is provided between the negative electrode of the second battery module and the DC / DC converter. The MCC main control module 1 and the DC / DC converter are in communication connection.

[0049] In this embodiment, when the mobile energy storage system is in charging mode, one end of the DC / DC converter is connected between the switch Q1 and the DC input end of the inverter M2, and the AC power is converted into direct current through the inverter M2 and then charges the second battery module through the DC / DC converter.

[0050] The positive electrode of the second battery module is electrically connected to the positive electrode of the diode D2 through the intermediate relay KA1 and the intermediate relay KA3. The negative electrode of the diode D2 is connected to the charging interface. The negative electrode of the second battery module is electrically connected to the charging interface. The diode D2 is used to ensure the unidirectional flow of current. The intermediate relay KA3 is electrically connected to the MCC main control module 1. The mobile energy storage system is electrically connected to the electric vehicle, and the electric vehicle and the MCC main control module 1 establish a communication connection. In the DC rescue charging mode, the second battery module and the third battery module are connected in parallel.

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A mobile energy storage system suitable for a pure electric mobile service vehicle, characterized in that: It includes MCC main control module, EPS module, energy storage component, AC input interface, AC output interface, DC interface and charging interface; The EPS module is communicatively connected to the MCC main control module, and the energy storage component is communicatively connected to the MCC main control module; The energy storage component is a battery module, including a first battery module used as a power source, a second battery module used as an auxiliary power source, and a third battery module used as a DC power source; The mobile energy storage system is provided with an EPS mode switch K2, a charging switch K3, an inverter switch K4 and a DC charging switch K5, one end of the EPS mode switch K2, the charging switch K3, the inverter switch K4 and the DC charging switch K5 are electrically connected to the MCC main control module, and the other end is electrically connected to the positive electrode of the third battery module; The mains input interface is electrically connected to the EPS module through the switch Q4, the mains output interface is electrically connected to the EPS module through the switch Q3, the switch Q4 is electrically connected to the MCC main control module through the second switch detection module, and the switch Q3 is electrically connected to the MCC main control module through the first switch detection module; The first battery module is electrically connected to the DC input terminal of the inverter M1, an AC contactor KM1 is provided between the positive output terminal of the first battery module and the inverter M1, an AC contactor KM2 is provided between the negative output terminal of the first battery module and the inverter M1, and the AC output terminal of the inverter M1 is electrically connected to the AC input terminal of the inverter M2 and the EPS module through a switch Q2; The AC contactor KM1 and the AC contactor KM2 are both connected to the MCC main control module by wires to form a contactor control and feedback loop; The DC input terminal of the inverter M1 is electrically connected to the MCC main control module; A fuse FU1 is provided between the AC contactor KM1 and the inverter M1, and a fuse FU2 is provided between the AC contactor KM2 and the inverter M1. The fuse FU1 and the fuse FU2 are both electrically connected to the MCC main control module to form a fast-blow feedback circuit.

2. A mobile energy storage system suitable for a pure electric mobile service vehicle according to claim 1, characterized in that: The DC interface is electrically connected to the DC input terminal of the inverter M2 via a switch Q1.

3. A mobile energy storage system suitable for a pure electric mobile service vehicle according to claim 2, characterized in that: The third battery module is electrically connected to the charging interface via a switch K1 , the anode of the third battery module is connected to the anode of a diode D1 , and the cathode of the diode D1 is connected to the charging interface.

4. A mobile energy storage system suitable for a pure electric mobile service vehicle according to claim 3, characterized in that: The second battery module is electrically connected to the PDU power interface of the MCC main control module through a DC / DC converter, an intermediate relay KA1 is provided between the positive electrode of the second battery module and the DC / DC converter, and an intermediate relay KA2 is provided between the negative electrode of the second battery module and the DC / DC converter, and the intermediate relay KA1 and the intermediate relay KA2 are both electrically connected to the MCC main control module to form a contactor control and feedback loop; The MCC main control module is communicatively connected with the DC / DC converter; One end of the DC / DC converter is connected between the switch Q1 and a DC input end of the inverter M2 .

5. A mobile energy storage system suitable for a pure electric mobile service vehicle according to claim 4, characterized in that: The positive electrode of the second battery module is electrically connected to the positive electrode of the diode D2 through the intermediate relay KA1 and the intermediate relay KA3, the negative electrode of the diode D2 is connected to the charging interface, and the negative electrode of the second battery module is electrically connected to the charging interface.

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