Multi-power module matching method based on energy storage type charging pile

Abstract

The invention provides a multi-power module grouping method based on an energy storage type charging pile. A plurality of power modules are divided into A system power modules and B system power modules; the charging pile distributes an A system power module / a B system power module to different CAN buses as required according to the request power of a charging gun management system CCU, and distributes the A system power module / the B system power module to an EMS control software A system / an EMS control software B system according to the different CAN buses; according to the invention, the existing CAN buses in the charging pile are utilized to distribute the power modules, that is, the plurality of power modules are distributed to different CAN buses according to requirements, the power modules are distributed to a system A and a system B according to the different CAN buses, after the power modules are grouped, the systems are clearly separated to cooperate with the BMU work of the corresponding systems, and the power modules are distributed to the system A and the system B according to the different CAN buses. And logic errors caused by simultaneous discharge of the dual systems are prevented, and the complexity during deployment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and particularly relates to a multi-power module matching method based on an energy storage type charging pile. Background Art

[0002] At present, there are charging piles with single-gun system and double-gun system structures in the market. Among them, the single-gun system has a simple structure, and the process of calling power modules is not complicated. However, when a high-power request occurs, the charging pile itself may not be able to meet the demand, resulting in slow charging and long charging time. The charging pile with a double-gun system has multiple power modules, can intelligently allocate loads, has strong compatibility, and can support multiple discharge modes. However, how to manage the coordinated call of resources of multiple power modules is an important technical problem to be solved.

[0003] In the prior art, during the process of discharging power from an energy storage type charging pile with a double-gun system to a vehicle, when other controllers need to cooperate with or call power modules, it is impossible to confirm which specific power module is called. If not grouped, it will cause logical confusion during the call of power modules and unnecessary failures. Summary of the Invention

[0004] The present invention provides a multi-power module matching method based on an energy storage type charging pile to solve the above technical problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A multi-power module matching method based on an energy storage type charging pile divides multi-power modules into A-system power modules and B-system power modules; the charging pile distributes the A-system power modules / B-system power modules to different CAN buses according to the requested power of the charging gun management system CCU, and distributes the A-system power modules / B-system power modules to the EMS control software A-system / EMS control software B-system according to different CAN buses.

[0007] The A-system power modules include AC / DC1, DC / DC1, and DC / DC2. The A-system power modules are connected to the EMS control software A-system through a CAN bus. The A-system power modules are respectively connected to the battery management system BMS and the charging gun management system CCU through a wire harness. The battery management system BMS and the charging gun management system CCU are connected to the EMS control software A-system through a CAN bus.

[0008] The power module of the B system includes AC / DC2, DC / DC3, and DC / DC4. The power module of the B system is connected to the B system of the EMS control software through the CAN bus. The power module of the B system is respectively connected to the battery management system BMS and the charging gun management system CCU through a wire harness. The battery management system BMS and the charging gun management system CCU are connected to the B system of the EMS control software through the CAN bus.

[0009] If the power requested by the charging gun management system CCU is less than the output power of AC / DC1 or AC / DC2, only AC / DC1 or AC / DC2 discharges; if the requested power is greater than the output power of AC / DC1 or AC / DC2, then DC / DC1 and DC / DC2 or C / DC3 and DC / DC4 intervene in the discharge.

[0010] If the power requested by the charging gun management system CCU is greater than the requested power of AC / DC1, DC / DC1, and DC / DC2, AC / DC2 intervenes in the discharge; if the power requested by the charging gun management system CCU is greater than the requested power of AC / DC2, DC / DC3, and DC / DC4, AC / DC1 intervenes in the discharge.

[0011] Advantages of the present invention:

[0012] Based on the multi-power module matching method of the energy storage charging pile, the present invention utilizes the existing CAN bus in the charging pile to allocate power modules, that is, distributes multiple power modules to different CAN buses according to requirements, and distributes the power modules to the A system and the B system according to different CAN buses. After the power modules are grouped, the systems are clearly separated and cooperate with the BMU of the corresponding system to prevent logical errors caused by simultaneous discharge of the dual systems and reduce the complexity during deployment. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of power module control according to an embodiment of the present invention. Detailed Embodiments

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0015] Such as Figure 1As shown in the figure, a multi-power module matching method based on an energy storage type charging pile in an embodiment of the present invention divides the multi-power modules into A-system power modules and B-system power modules; the charging pile distributes the A-system power modules / B-system power modules to different CAN buses according to the requested power of the charging gun management system CCU, and distributes the A-system power modules / B-system power modules to the EMS control software A-system / EMS control software B-system according to different CAN buses.

[0016] In an embodiment of the present invention, as Figure 1 shown, the A-system power module includes AC / DC1, DC / DC1, and DC / DC2. The A-system power module is connected to the EMS control software A-system through a CAN bus. The A-system power module is respectively connected to the battery management system BMS and the charging gun management system CCU through a wire harness. The battery management system BMS and the charging gun management system CCU are connected to the EMS control software A-system through a CAN bus.

[0017] In an embodiment of the present invention, as Figure 1 shown, the B-system power module includes AC / DC2, DC / DC3, and DC / DC4. The B-system power module is connected to the EMS control software B-system through a CAN bus. The B-system power module is respectively connected to the battery management system BMS and the charging gun management system CCU through a wire harness. The battery management system BMS and the charging gun management system CCU are connected to the EMS control software B-system through a CAN bus.

[0018] In the present invention, the power module is controlled through a CAN bus, and the baud rates of all CAN buses are the same.

[0019] As Figure 1 shown in the power module control schematic diagram, the control signals and feedback signals of DC / DC1 and AC / DC1 belong to the CAN1 bus; the control signal and feedback signal of DC / DC2 belong to the CAN2 bus; the control signals and feedback signals of DC / DC3 and AC / DC2 belong to the CAN3 bus; the control signal and feedback signal of DC / DC4 belong to the CAN4 bus.

[0020] The CAN1 and CAN2 buses where DC / DC1, AC / DC1, and DC / DC2 are located belong to the CAN buses of the A-system; the CAN3 and CAN4 buses where DC / DC3, AC / DC2, and DC / DC4 are located belong to the CAN buses of the B-system.

[0021] As Figure 1 shown in the power module control schematic diagram:

[0022] (1) When the EMS control software A system has a charge and discharge request, the EMS control software periodically sends a control signal for AC / DC1, which propagates through the CAN1 bus to AC / DC1. After receiving this signal, AC / DC1 is activated. AC / DC1 responds to the control instructions of the EMS control software and feeds back the response signal to the EMS control software through CAN1. AC / DC1 is connected to CCU1 (charging gun management system) and BMS1 (battery management system) through a wire harness to charge and discharge the battery pack and CCU1.

[0023] (2) When the CCU of the A system has a discharge request, the EMS periodically sends a control signal for DC / DC1, which propagates through the CAN1 bus to DC / DC1. After receiving this signal, DC / DC1 is activated. DC / DC1 responds to the control instructions of the EMS and feeds back the response signal to the EMS through CAN1. DC / DC1 is connected to CCU1 and BMS1 through a wire harness to discharge CCU1.

[0024] (3) When the CCU of the A system has a discharge request, the EMS periodically sends a control signal for DC / DC2, which propagates through the CAN2 bus to DC / DC2. After receiving this signal, DC / DC2 is activated. DC / D2 responds to the control instructions of the EMS and feeds back the response signal to the EMS through CAN2. DC / DC2 is connected to CCU1 and BMS1 through a wire harness to discharge CCU2.

[0025] (4) When the B system has a charge and discharge request, the EMS periodically sends a control signal for AC / DC2, which propagates through the CAN3 bus to AC / DC2. After receiving this signal, AC / DC2 is activated. AC / DC2 responds to the control instructions of the EMS and feeds back the response signal to the EMS through CAN3. AC / DC2 is connected to CCU2 and BMS2 through a wire harness to charge and discharge the battery pack and CCU2.

[0026] (5) When the CCU of the B system has a discharge request, the EMS periodically sends a control signal for DC / DC3, which propagates through the CAN3 bus to DC / DC3. After receiving this signal, DC / DC3 is activated. DC / DC3 responds to the control instructions of the EMS and feeds back the response signal to the EMS through CAN3. DC / DC3 is connected to CCU2 and BMS2 through a wire harness to discharge CCU2.

[0027] When the B system CCU has a discharge request, the EMS periodically sends a control signal for DC / DC4, which propagates through the CAN4 bus to DC / DC4. After receiving this signal, DC / DC4 is activated. DC / DC4 responds to the control instruction of the EMS and feeds back the response signal to the EMS through CAN4. DC / DC4 is connected to CCU2 and BMS2 through a wire harness to discharge CCU2.

[0028] All DC / DCs have the same software, that is, the IDs of the control message and the feedback message are the same as those in the CAN Matrix.

[0029] All AC / DCs have the same software, that is, the IDs of the control message and the feedback message are the same as those in the CAN Matrix, but the CAN ID is different from that of DC / DC.

[0030] The CAN communication between the EMS and the AC / DC or DC / DC is an event-based message.

[0031] For example:

[0032] (1) The EMS periodically sends a set message instruction for AC / DC1 through CAN1, with the ID 1AE10101. The start-up instruction in the message is 1, the voltage instruction is 500V, and the current instruction is 20A. After receiving this message instruction, AC / DC1 is activated, responds to the control of this message, charges and discharges the battery pack or CCU, and feeds back the actual value of the response signal through 1CC10110 / 1CC10111 / 1CC10112 (in the instruction message with the ID 1AE10101, 1A is the fixed start; E1 indicates the instruction message, 01 indicates AC / DC, 00 indicates DC / DC, and the last 01 indicates the first frame of the control message, 02 indicates the second frame of the control message...; in the feedback instruction message with the ID 1CC10110, 1C is the fixed start; C1 indicates the feedback message; 01 indicates AC / DC, 00 indicates DC / DC; the last 01 indicates the first frame of the feedback message, 02 indicates the first frame of the feedback message).

[0033] (2) The EMS sends a set message instruction for DC / DC1 through CAN1, with the ID 1AE10001. The start-up instruction in the message is 1, the voltage instruction is 500V, and the current instruction is 100A. After receiving this message instruction, DC / DC1 is activated, responds to the control of this message, charges and discharges CCU1, and feeds back the actual value of the corresponding signal through 1CC10010 / 1CC10011 / 1CC10012.

[0034] (3) The EMS issues a set message command for DC / DC2 through CAN2. The ID is the same as that of the set message command for DC / DC1 (1AE10001). In the message, the power-on command is 1, the voltage command is 500V, and the current command is 100A. After receiving this message command, DC / DC1 is activated, responds to the control of this message, charges and discharges CCU1, and feeds back the actual values of the corresponding signals through 1CC10010 / 1CC10011 / 1CC10012 (the same as the message fed back by DC / DC1).

[0035] (4) The EMS periodically issues a set message command for AC / DC2 through CAN3. The ID is 1AE10101. In the message, the power-on command is 1, the voltage command is 500V, and the current command is 20A. After receiving this message command, AC / DC2 is activated, responds to the control of this message, charges and discharges the battery pack or CCU, and feeds back the actual values of the corresponding signals through 1CC10110 / 1CC10111 / 1CC10112.

[0036] 5(5) The EMS issues a set message command for DC / DC3 through CAN3. The ID is 1AE10001. In the message, the power-on command is 1, the voltage command is 500V, and the current command is 100A. After receiving this message command, DC / DC1 is activated, responds to the control of this message, charges and discharges CCU2, and feeds back the actual values of the corresponding signals through 1CC10010 / 1CC10011 / 1CC10012.

[0037] (6) The EMS issues a set message command for DC / DC4 through CAN4. The ID is 1AE10001. In the message, the power-on command is 1, the voltage command is 500V, and the current command is 100A. After receiving this message command, DC / DC1 is activated, responds to the control of this message, charges and discharges CCU2, and feeds back the actual values of the corresponding signals through 1CC10010 / 1CC10011 / 1CC10012.

[0038] In an embodiment of the present invention, if the power requested by the charging gun management system CCU is less than the output power of AC / DC1 or AC / DC2, only AC / DC1 or AC / DC2 discharges; if the requested power is greater than the output power of AC / DC1 or AC / DC2, then DC / DC1 and DC / DC2 or C / DC3 and DC / DC4 intervene in the discharge.

[0039] During the process of the energy storage charging pile discharging to the vehicle, the charging pile will enter different discharging modes according to the magnitude of the requested power. For example, taking System A as an example, if the requested power of CCU1 is less than the output power of AC / DC1, only AC / DC1 discharges; if the requested power is greater than the output power of AC / DC1, then DC / DC1 and DC / DC2 intervene in the discharge.

[0040] In an embodiment of the present invention, when the requested power of the charging gun management system CCU is greater than the requested powers of AC / DC1, DC / DC1, and DC / DC2, AC / DC2 intervenes in the discharge; when the requested power of the charging gun management system CCU is greater than the requested powers of AC / DC2, DC / DC3, and DC / DC4, AC / DC1 intervenes in the discharge.

[0041] For example, taking System A as an example, when the requested power of CCU1 is greater than the requested powers of AC / DC1, DC / DC1, and DC / DC2, AC / DC2 of System B intervenes in the discharge. Therefore, when the requested power at the vehicle end is too large, the EMS can call the AC / DC of another set of systems to enter the discharge, and at the end of the discharge, "return" the borrowed power module.

[0042] The present invention is supported by the power module hardware of the dual-gun system energy storage charging pile. Through simple CAN line connection, the grouping and control of power modules can be distinguished, simplifying the problem of distinguishing group number allocation when the charging pile contains multiple power modules, optimizing the control logic, and at the same time, it can also be used as a foolproof measure to meet the later discharge call and avoid logical errors.

[0043] In summary, based on the multi-power module grouping method of the energy storage charging pile, the present invention utilizes the existing CAN bus in the charging pile to allocate power modules, that is, distributes multiple power modules to different CAN buses according to requirements, and distributes the power modules to System A and System B according to different CAN buses. After the power modules are grouped, the systems are clearly separated and cooperate with the BMU of the corresponding system to prevent logical errors caused by simultaneous discharge of the dual systems and reduce the complexity during deployment.

[0044] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly defined or limited, terms such as "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0047] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] Any process or method description shown in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present invention includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0049] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definitional sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in conjunction with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection parts with one or more wirings (electronic devices), portable computer disk cartridges (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing as necessary, and then stored in a computer memory.

[0050] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having suitable combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0051] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the methods of the above-described embodiments can be completed by a program instructing relevant hardware, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0052] In addition, each functional unit in various embodiments of the present invention may be integrated into a processing module, may exist physically alone for each unit, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for assembling multiple power modules based on an energy storage charging pile, characterized in that: Divide the multiple power modules into A system power modules and B system power modules; The charging pile allocates the A system power module / B system power module to different CAN buses as required according to the requested power of the charging gun management system CCU, and allocates the A system power module / B system power module to the EMS control software A system / EMS control software B system according to different CAN buses.

2. The multi-power module assembly method based on the energy storage charging pile according to claim 1 is characterized in that: The A system power module includes AC / DC1, DC / DC1 and DC / DC2. The A system power module is connected to the EMS control software A system through the CAN bus. The A system power module is respectively connected to the battery management system BMS and the charging gun management system CCU through wiring harnesses. The battery management system BMS and the charging gun management system CCU are connected to the EMS control software A system through the CAN bus.

3. The multi-power module assembly method based on the energy storage charging pile according to claim 2 is characterized in that: The B system power module includes AC / DC2, DC / DC3 and DC / DC4. The B system power module is connected to the EMS control software B system through the CAN bus. The B system power module is respectively connected to the battery management system BMS and the charging gun management system CCU through wiring harnesses. The battery management system BMS and the charging gun management system CCU are connected to the EMS control software B system through the CAN bus.

4. The multi-power module assembly method based on the energy storage charging pile according to claim 3 is characterized in that: If the power requested by the charging gun management system CCU is less than the output power of AC / DC1 or AC / DC2, only AC / DC1 or AC / DC2 will be discharged; If the requested power is greater than the output power of AC / DC1 or AC / DC2, DC / DC1 and DC / DC2 or C / DC3 and DC / DC4 intervene in the discharge.

5. The multi-power module assembly method based on the energy storage charging pile according to claim 4 is characterized in that: If the power requested by the charging gun management system CCU is greater than the power requested by AC / DC1, DC / DC1 and DC / DC2, AC / DC2 intervenes to discharge; If the power requested by the charging gun management system CCU is greater than the requested power of AC / DC2, DC / DC3 and DC / DC4, AC / DC1 intervenes to discharge.

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