A charging machine and a charging station

Abstract

The present disclosure relates to a charger and a charging station, wherein the charger comprises: an AC contactor group, a bidirectional module compartment, a first contactor matrix and a battery compartment; the AC contactor group is used to connect the bidirectional module compartment with a station microgrid; the bidirectional module compartment is used to provide electric energy to the battery compartment or invert the electric energy of the battery compartment into the station microgrid; the first contactor matrix is ​​used to connect the bidirectional module compartment and the battery compartment, the bidirectional module compartment comprises a plurality of bidirectional module groups, the first contactor matrix comprises a first contactor group equal to the number of the bidirectional module groups, the battery compartment comprises a plurality of battery groups, the bidirectional module groups are connected to the first contactor groups in a one-to-one correspondence, and the number of battery groups connected to each first contactor group is sequentially reduced from the total number of battery groups. The present disclosure can realize the electric energy replenishment to the power grid, so that the corresponding relationship between the bidirectional module group and the battery group can be freely adjusted through the switch of the first contactor matrix, and the influence of the failure of the bidirectional module group on the charging and discharging of the battery can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of charging stations, and in particular to a charger and a charging station. Background Art

[0002] In order to meet the charging needs of various types of vehicles, charging stations will adopt a combination of charging and battery replacement, so that the stations have both fast battery replacement and conventional charging functions. With the development of charging technology and energy storage technology, as well as the increasing demand for charging speed, DC charging equipment is increasingly deployed in charging stations, which puts greater pressure on the operation and power supply and distribution management of the stations. Since the load of the power grid varies greatly in different time periods, for example, the load is lower at night when electricity consumption is low, and higher at daytime peaks, with the large-scale construction of charging stations, high-load charging stations will have a greater impact on the operation of the power grid, and may even threaten the safety of the power system. Summary of the invention

[0003] In order to solve at least one of the above-mentioned technical problems, the present disclosure proposes a charger and a charging station.

[0004] In one aspect, the present disclosure provides a charger, the charger comprising: an AC contactor group, a bidirectional module compartment, a first contactor matrix and a battery compartment; The AC contactor group is used to connect the bidirectional module warehouse and the station microgrid; The bidirectional module compartment is used to provide power to the battery compartment or to invert the power of the battery compartment into the station microgrid; The first contactor matrix is ​​used to connect the bidirectional module compartment and the battery compartment. The bidirectional module compartment includes multiple bidirectional module groups. The first contactor matrix includes first contactor groups whose number is equal to the bidirectional module groups. The battery compartment includes multiple battery groups. The bidirectional module groups are connected to the first contactor groups in a one-to-one correspondence. The number of battery groups connected to each first contactor group decreases in sequence from the total number of battery groups.

[0005] In an optional embodiment, the charger further includes: a controller; The controller is used to change the connection relationship between each bidirectional module group and each battery group by controlling the on and off of the switches in each first contactor group.

[0006] In an optional embodiment, the controller includes: a communication module and an input and output control board; The communication module is used to realize communication with the bidirectional module compartment and the battery compartment; The input-output control board is respectively connected to the communication module, the AC contactor group and the first contactor matrix, and the input-output control board is used to control the AC contactor group and the first contactor matrix according to the instructions sent by the communication module.

[0007] In an optional embodiment, the controller further includes: a voltage conversion module; The voltage conversion module is used to convert the mains power into the voltage required by the controller and to supply power to the communication module and the input and output control board.

[0008] In an optional embodiment, the charger further includes: a charging module compartment; The charging module compartment is used to supply power to the battery compartment; The power input end of the charging module compartment is connected to the station microgrid through an AC contactor group, and the power output end of the charging module compartment is connected to the battery compartment.

[0009] In an optional embodiment, the charging module compartment includes charging module groups and DC contactors equal in number to the number of battery groups; Each charging module group is connected to a corresponding battery group in a one-to-one correspondence through a corresponding DC contactor.

[0010] In an optional embodiment, the communication module in the controller of the charger is also used to achieve communication with the charging module compartment; The input and output control board of the controller is also connected to the DC contactor, and the input and output control board is used to control the DC contactor according to the instructions sent by the communication module.

[0011] In an optional embodiment, the charger further comprises: a second contactor matrix; The second contactor matrix is ​​used to connect the charging module compartment and the battery compartment; the charging module compartment includes multiple charging module groups, and the second contactor matrix includes second contactor groups equal to the number of charging module groups. The charging module groups are connected to the second contactor groups in a one-to-one correspondence, and the number of battery groups connected to each second contactor group decreases in sequence from the total number of battery groups.

[0012] In an optional embodiment, the communication module in the controller of the charger is also used to achieve communication with the charging module compartment; The input-output control board of the controller is also connected to the second contactor matrix, and the input-output control board is used to control the second contactor matrix according to the instructions sent by the communication module.

[0013] In a second aspect, the present disclosure further provides a charging station, which includes the above-mentioned charger.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0015] The implementation of this disclosure has the following beneficial effects: The charger includes an AC contactor group, a bidirectional module compartment, a first contactor matrix and a battery compartment; the AC contactor group is used to connect the bidirectional module compartment and the station microgrid; the bidirectional module compartment is used to provide power to the battery compartment or invert the power of the battery compartment into the station microgrid; the first contactor matrix is ​​used to connect the bidirectional module compartment and the battery compartment, the bidirectional module compartment includes multiple bidirectional module groups, the first contactor matrix includes first contactor groups equal to the number of bidirectional module groups, the battery compartment includes multiple battery groups, the bidirectional module groups are connected to the first contactor groups in a one-to-one correspondence, and the number of battery groups connected to each first contactor group decreases in sequence from the total number of battery groups.

[0016] The present invention provides a bidirectional module compartment in the charger, which can not only support charging the battery pack in the battery compartment, but also support the reverse feedback of the electric energy in the battery pack in the battery compartment to the station microgrid, so as to realize the electric energy replenishment to the power grid and reduce the impact of high load on the power grid during peak power consumption. At the same time, the bidirectional power supply function of the bidirectional module compartment can play an energy storage role, and there is no need to configure an additional energy storage system for the charging station, thus saving the construction cost of the station. The bidirectional module group is connected to the first contactor group in a one-to-one correspondence, and the number of battery groups connected to each first contactor group decreases in sequence from the total number of battery groups, so that the corresponding relationship between the bidirectional module group and the battery group can be freely adjusted through the switch of the first contactor matrix, and the arbitrary switching between the bidirectional module group and the battery group can be realized through the configuration of as few contactors as possible, which can reduce the number of contactors used and save costs while more flexibly configuring the connection between the bidirectional module group and the battery group.

[0017] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure, and do not constitute an improper limitation of the present disclosure.

[0019] Figure 1 is a schematic diagram of a charger according to an exemplary embodiment; Figure 2 is a schematic diagram showing a connection relationship of a controller 5 according to an exemplary embodiment; Figure 3is a schematic diagram of a charger including a charging module compartment 6 according to an exemplary embodiment; Figure 4 is a schematic diagram of a charging module compartment 6 and a battery compartment 4 according to an exemplary embodiment; Figure 5 is a schematic diagram showing a connection relationship of another controller 5 according to an exemplary embodiment; The following is a supplementary description of the attached drawings: 1-AC contactor group; 2-bidirectional module compartment; 3-first contactor matrix; 4-battery compartment; 5-controller; 6-charging module compartment; 7-second contactor matrix. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0022] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated. The word "exemplary" is used specifically herein to mean "serving as an example, embodiment, or illustrative". Any embodiment described herein as "exemplary" is not necessarily to be construed as being superior or better than other embodiments.

[0023] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0024] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0025] Figure 1 is a schematic diagram of a charger according to an exemplary embodiment. Figure 1 As shown, the charger includes: an AC contactor group 1, a bidirectional module compartment 2, a first contactor matrix 3 and a battery compartment 4; the AC contactor group 1 is used to connect the bidirectional module compartment 2 with the station microgrid; the bidirectional module compartment 2 is used to provide power to the battery compartment 4 or invert the power of the battery compartment 4 into the station microgrid; the first contactor matrix 3 is used to connect the bidirectional module compartment 2 and the battery compartment 4, the bidirectional module compartment 2 includes a plurality of bidirectional module groups, the first contactor matrix 3 includes a first contactor group equal to the number of bidirectional module groups, the battery compartment 4 includes a plurality of battery groups, the bidirectional module groups are connected to the first contactor groups in a one-to-one correspondence, and the number of battery groups connected to each first contactor group decreases in sequence from the total number of battery groups.

[0026] In the disclosed embodiment, the AC contactor group 1 connects the bidirectional module compartment 2 and the station microgrid, and the AC contactor group 1 includes multiple AC contactors. Each bidirectional module group in the bidirectional module compartment 2 is connected to the A, B, and C three-phase AC power of the station microgrid through an AC contactor. The AC contactor controls the on-off of the circuit, the start and stop of charging, and the start and stop of power inversion. Taking charging as an example, when the bidirectional module group starts to charge the battery pack, the AC contactor is energized to connect the AC power of the station microgrid to the bidirectional module group. After charging is completed or a fault occurs, the AC contactor automatically disconnects and cuts off the AC power supply to ensure charging safety. In an optional embodiment, the AC contactor can be used in conjunction with an overload and short-circuit protection element. When the circuit is overloaded or short-circuited, it can automatically disconnect the circuit to protect the safety of the bidirectional module group and the microgrid equipment. In the above manner, the AC contactor in the connection between the station microgrid and the bidirectional module compartment 2 not only ensures the safety and reliability of the charging and inversion process, but also improves the automation and intelligence level of the system.

[0027] In the disclosed embodiment, each bidirectional module group is composed of a plurality of bidirectional modules, and the bidirectional modules in the same bidirectional module group are arranged in parallel, and the three-phase alternating current is respectively connected to each parallel bidirectional module. The bidirectional modules in the same bidirectional module group simultaneously provide power to a battery group, or simultaneously invert the power of a battery group into the station microgrid.

[0028] In the disclosed embodiment, the first contactor matrix 3 connects the bidirectional module compartment 2 and the battery compartment 4. Since the bidirectional module compartment 2 and the battery compartment 4 are connected in a trapezoidal connection in the present application, the first contactor matrix 3 is a trapezoidal matrix. The first contactor matrix 3 includes first contactor groups equal in number to the bidirectional module groups. The bidirectional module groups are connected to the first contactor groups in a one-to-one correspondence. The battery compartment 4 includes a plurality of battery groups, and the number of battery groups connected to each first contactor group decreases in sequence from the total number of battery groups. In other words, the first group of bidirectional module groups is fully connected to the battery group through the corresponding first contactor group, and each subsequent group of bidirectional module groups is connected to one less battery group than the previous group. This connection method saves a part of the contactor while ensuring the arbitrary switching function between the bidirectional module group and the battery group.

[0029] Exemplarily, the bidirectional module compartment 2 is provided with a total of M bidirectional module groups, each bidirectional module group is provided with m bidirectional modules, the m bidirectional modules in the same bidirectional module group are arranged in parallel, and the three-phase AC power is respectively connected to each parallel bidirectional module. Correspondingly, the first contactor matrix 3 includes M first contactor groups, the battery compartment 4 is provided with N battery groups, one battery group is connected to one DC bus, the first first contactor group includes N contactors, the first bidirectional module group is fully connected to the N DC bus corresponding to the N battery groups through the N contactors of the first first contactor group, the second first contactor group includes N-1 contactors, the second bidirectional module group is connected to the N-1 DC bus corresponding to the N-1 battery group through the N-1 contactors of the second first contactor group, and each subsequent bidirectional module group is connected to one less DC bus of the battery group than the previous group, until the last bidirectional module group is connected to the N-M+1 DC bus corresponding to the N-M+1 battery group through the N-M+1 contactors of the last first contactor group.

[0030] A group of bidirectional module groups will only be projected to one DC bus at most at a certain operating moment, and a group of bidirectional modules can meet the maximum power discharge output of a battery group. When the bidirectional module compartment 2 and the battery compartment 4 are connected through the first contactor matrix, each bidirectional module group can correspond to a unique bus, and the remaining buses are shared buses. All bidirectional module groups can be projected. The number of DC bus lines is the same as the number of battery groups, which is N. The number of bidirectional module groups is M. DC bus 1 to DC bus M can be regarded as unique buses, and bidirectional module group 1 to bidirectional module group M are connected through a contactor respectively. DC bus M+1 to bus N are shared buses, which can correspond to any bidirectional module group.

[0031] In an optional embodiment, the charger further includes: a controller 5; the controller 5 is used to change the connection relationship between each bidirectional module group and each battery group by controlling the on and off of the switches in each first contactor group.

[0032] In the disclosed embodiment, the controller 5 can control the on and off of the switches in each first contactor group in combination with the states of each bidirectional module group and each battery group. When a bidirectional module group is in a faulty state, the controller disconnects all contactor switches in the first contactor group corresponding to the bidirectional module group, and when a battery group is in a faulty state, the controller disconnects each contactor in each first contactor group connected to the battery group.

[0033] In an exemplary embodiment, taking the contactor group corresponding to the bidirectional module group a as the first contactor group a as an example, when the bidirectional module group a supplies power to the battery group b, the contactor in the first contactor group a connected to the battery group b is energized. After the bidirectional module group a enters a fault state, the controller 5 controls the contactor in the first contactor group a connected to the battery group b to be disconnected. At the same time, the other contactors in the first contactor group a are always kept disconnected to prevent the fault of the bidirectional module group a from affecting other circuit components in the charger.

[0034] In another exemplary embodiment, taking the contactor group corresponding to the bidirectional module group a as the first contactor group a as an example, in the process of the bidirectional module group a inverting the electric energy in the battery group b into the station microgrid, the contactor connected to the battery group b in the first contactor group a is energized, and after the battery group b enters a fault state, the controller 5 controls the contactor connected to the battery group b in the first contactor group a to be disconnected. At the same time, the other contactors connected to the battery group b in each first contactor group remain disconnected to prevent the fault of the battery group b from affecting other circuit components in the charger.

[0035] Based on the above, it can be known that in the embodiment of the present disclosure, by setting up a controller 5, the control instructions of the controller can be used to adjust the on and off of the switches in each contactor group to change the connection relationship between each bidirectional module group and each battery group. By enabling the power supply circuit to skip the faulty bidirectional module group or battery group, the impact of the fault on the power supply circuit is reduced.

[0036] Figure 2 FIG. 5 is a schematic diagram showing a connection relationship of a controller 5 according to an exemplary embodiment. Figure 2 As shown, the controller 5 includes: a communication module and an input-output control board; the communication module is used to realize communication with the bidirectional module compartment 2 and the battery compartment 4; the input-output control board is respectively connected to the communication module, the AC contactor group 1 and the first contactor matrix 3, and the input-output control board is used to control the AC contactor group 1 and the first contactor matrix 3 according to the instructions issued by the communication module.

[0037] In the disclosed embodiment, the controller 5 divides the communication function and the circuit control function into two modules for processing. The communication module is used for business monitoring and realizing communication with the bidirectional module compartment 2 and the battery compartment 4. Specifically, the channels for the bidirectional module compartment 2 and the battery compartment 4 to communicate with the communication module are independent of each other. The communication module communicates with the bidirectional module compartment 2 through the CAN2 communication channel, and the communication content between the bidirectional module compartment 2 and the communication module can be the usage status, real-time voltage, real-time current and other information of each bidirectional module group in the bidirectional module compartment 2; the communication module communicates with the battery compartment 4 through the CAN3 communication channel, and the communication content between the battery compartment 4 and the communication module can be the power status, battery voltage, battery current and other information of each battery group in the battery compartment 4.

[0038] The input-output control board is connected to the communication module, the AC contactor group 1 and the first contactor matrix 3 respectively. Specifically, the communication module communicates with the input-output control board through the Uart1 communication channel; the AC contactor group 1 is connected to the first group of DI ports and DO ports of the input-output control board, wherein the AC contactor group 1 transmits the feedback of the contactor to the input-output control board through the DI port, and the AC contactor group 1 receives the control signal transmitted by the input-output control board through the DO port; the first contactor matrix 3 is connected to the second group of DI ports and DO ports of the input-output control board, wherein the first contactor matrix 3 transmits the feedback of the contactor to the input-output control board through the DI port, and the first contactor matrix 3 receives the control signal transmitted by the input-output control board through the DO port.

[0039] The controller 5 can control the AC contactor group 1 and the first contactor matrix 3 based on the scheduling algorithm configured by itself according to the communication information transmitted by the bidirectional module compartment 2 and the battery compartment 4 to realize power supply for the battery in the battery compartment 4. For example, when the information transmitted by the bidirectional module compartment 2 and the battery compartment 4 to the controller 5 indicates that the bidirectional module group a in the bidirectional module compartment 2 is in an idle state and the battery group b is insufficient in power, the controller 5 can dispatch the bidirectional module group a to the battery group b for charging. Specifically, a control signal can be sent to the AC contactor a connecting the bidirectional module group a and the station microgrid and the first contactor group a corresponding to the bidirectional module group a, so that the AC contactor a is energized, the contactor connecting the bidirectional module group a and the battery group b in the first contactor group a is energized, and the other contactors in the first contactor group a remain disconnected, so that a path is formed between the station microgrid and the battery group b, and the AC contactor a and the first contactor group a feedback the contactor status to the controller 5 to complete the charging logic of the battery group b.

[0040] The controller 5 can also be used in conjunction with a remote control system to upload the communication information transmitted by the bidirectional module compartment 2 and the battery compartment 4 to the remote control system, and the remote control system integrates the communication information of the bidirectional module compartment 2 and the battery compartment 4 as well as the grid demand information to control the AC contactor group 1 and the first contactor matrix 3 to achieve the inversion of the electric energy stored in the batteries in the battery compartment 4 into the station microgrid. For example, when the communication information between the bidirectional module compartment 2 and the battery compartment 4 indicates that the bidirectional module group a in the bidirectional module compartment 2 is in an idle state and the battery group b is fully charged, and the grid demand information indicates that the grid is at a peak power consumption, the remote control system can issue a dispatch instruction to instruct the bidirectional module group a to enter the power inversion state and dispatch the bidirectional module group a to the battery group b for power inversion. Specifically, the dispatch instruction can be issued to the controller 5, and the controller 5 issues a state switching instruction to the bidirectional module group a to make the bidirectional module group a enter the power inversion state and to the battery group b. The AC contactor a connecting the bidirectional module group a and the station microgrid and the first contactor group a corresponding to the bidirectional module group a send a control signal to close the AC contactor a, close the contactor connecting the bidirectional module group a and the battery group b in the first contactor group a, and keep the other contactors in the first contactor group a disconnected, so that a path is formed between the station microgrid and the battery group b, and the electric energy of the battery group b is inverted into the station microgrid. The AC contactor a and the first contactor group a feed back the contactor status to the controller 5 to complete the electric energy inversion logic of the battery group b.

[0041] Based on the above, it can be known that in the embodiment of the present disclosure, by setting a communication module and an input-output control board in the controller, the communication function and circuit control function of the controller can be processed by different modules respectively, which is convenient for data maintenance; through the communication module communicating with the two-way module compartment 2 and the battery compartment 4, the input-output control board controls the AC contactor group 1 and the first contactor matrix 3 according to the instructions issued by the communication module, and can control the switching of each contactor in the AC contactor group 1 and the first contactor matrix 3 according to the data feedback from the two-way module compartment 2 and the battery compartment 4.

[0042] In an optional embodiment, if Figure 2 As shown, the controller 5 also includes: a voltage conversion module; the voltage conversion module is used to convert the mains power into the voltage required by the controller 5, and to supply power to the communication module and the input and output control board.

[0043] In the disclosed embodiment, the input end of the voltage conversion module is connected to the mains, and the output end of the voltage conversion module is respectively connected to the communication module and the input-output control board. The voltage conversion module can convert the mains in the AC state into the DC power required by the communication module and the input-output control board. Optionally, in this embodiment, any phase of the three-phase AC mains, 220V AC power, is selected to input the input end of the voltage conversion module, and the voltage conversion module converts the 220V AC power into 12V DC power to input the communication module and the input-output control board for power supply.

[0044] Based on the above, it can be seen that in the embodiment of the present disclosure, through the setting of the voltage conversion module, it is possible to convert the higher-voltage AC power into the lower-voltage power required by the communication module and the input and output control board, avoiding the configuration of an additional power supply for the controller 5 and reducing hardware costs.

[0045] Figure 3 FIG. 1 is a schematic diagram of a charger including a charging module compartment 6 according to an exemplary embodiment. In an optional embodiment, Figure 3 As shown, the charger also includes: a charging module compartment 6; the charging module compartment 6 is used to supply power to the battery compartment 4; the power input end of the charging module compartment 6 is connected to the station microgrid through the AC contactor group 1, and the power output end of the charging module compartment 6 is connected to the battery compartment 4.

[0046] In the disclosed embodiment, the AC contactor group 1 is also connected to the charging module compartment 6 and the station microgrid. The charging module compartment 6 is a DC charging compartment. The station microgrid, the AC contactor group 1, the charging module compartment 6 and the battery compartment 4 together constitute a charging circuit. The controller 5 maintains CAN communication connection with the bidirectional module compartment 2, the battery compartment 4, and the charging module compartment 6 respectively. The controller 5 is connected to the AC contactor group 1, the bidirectional module compartment 2, the first contactor matrix 3, and the charging module compartment 6 through the I / O interface.

[0047] Based on the above, it can be known that in the embodiment of the present disclosure, a charging module compartment 6 is set up, and the power input end of the charging module compartment 6 is connected to the station microgrid through the AC contactor group 1, and the power output end of the charging module compartment 6 is connected to the battery compartment 4, so as to provide a DC charging power supply to the battery pack.

[0048] Figure 4 FIG. 4 is a schematic diagram of a charging module compartment 6 and a battery compartment 4 according to an exemplary embodiment. Figure 4 As shown, the charging module compartment 6 includes charging module groups and DC contactors equal in number to the battery groups; each charging module group is connected to the corresponding battery group in a one-to-one correspondence via the corresponding DC contactor.

[0049] In the disclosed embodiment, the AC contactor group 1 includes a plurality of AC contactors connected to the charging module compartment 6, and each charging module group in the charging module compartment 6 is connected to the A, B, and C three-phase AC power of the station microgrid through an AC contactor. The AC contactor controls the on-off of the circuit and the start and stop of charging. When the charging module group starts to charge the battery pack, the AC contactor is energized to connect the AC power of the station microgrid to the charging module group. After charging is completed or a fault occurs, the AC contactor is automatically disconnected to cut off the AC power supply to ensure charging safety.

[0050] In the disclosed embodiment, each charging module group is composed of a plurality of charging modules, and the charging modules in the same charging module group are arranged in parallel, and three-phase AC power is respectively connected to each parallel charging module. The charging modules in the same charging module group provide power to a battery pack at the same time.

[0051] Exemplarily, the charging module compartment 6 is provided with a total of N groups of charging module groups, each group of charging module groups is provided with n charging modules, the n charging modules in the same charging module group are arranged in parallel, and the three-phase AC power is respectively connected to each parallel charging module. Correspondingly, the DC contactor area has a total of N DC contactors, and the battery compartment 4 is provided with N groups of battery groups, and one group of battery groups is connected to a DC bus corresponding to the first battery group through the first DC contactor, and the second charging module group is connected to the DC bus corresponding to the second battery group through the second DC contactor, until the last charging module group is connected to the DC bus corresponding to the last battery group through the last DC contactor.

[0052] Based on the above, it can be known that in the embodiment of the present disclosure, the charging module compartment 6 includes charging module groups and DC contactors equal to the number of battery groups; each charging module group is connected to the corresponding battery group one-to-one through the corresponding DC contactor, which can realize one-to-one power supply between the charging module group and the battery group, reducing the control complexity of the charging module compartment 6 and the corresponding connection cost.

[0053] In an optional embodiment, if Figure 2 As shown, the communication module in the controller 5 of the charger is also used to realize communication with the charging module compartment 6; the input and output control board of the controller 5 is also connected to the DC contactor, and the input and output control board is used to control the DC contactor according to the instructions issued by the communication module.

[0054] In the disclosed embodiment, the communication module can also realize communication with the charging module compartment 6. Specifically, the communication channels of the charging module compartment 6, the bidirectional module compartment 2, the battery compartment 4 and the communication module are independent of each other, and the communication module communicates with the charging module compartment 6 through the CAN1 communication channel. The communication content between the charging module compartment 6 and the communication module can be the use status, real-time voltage, real-time current and other information of each charging module group in the charging module compartment 6.

[0055] The input-output control board is also connected to each DC contactor in the DC contactor area. Specifically, the DC contactor is connected to the third group of DI ports and DO ports of the input-output control board, wherein the DC contactor transmits the feedback of the contactor to the input-output control board through the DI port, and the DC contactor receives the control signal transmitted by the input-output control board through the DO port.

[0056] The controller 5 can control each DC contactor based on its own configured scheduling algorithm or interact with the remote control system according to the communication information transmitted by the charging module compartment 6 and the battery compartment 4 to realize power supply for the battery in the battery compartment 4. For example, when the information transmitted by the charging module compartment 6 and the battery compartment 4 to the controller 5 indicates that the charging module group c in the charging module compartment 6 is in an idle state and the battery group b is insufficient, the controller 5 can dispatch the charging module group c to the battery group b for charging. Specifically, a control signal can be sent to the AC contactor c connecting the charging module group c and the station microgrid and the DC contactor c corresponding to the charging module group c, so that the AC contactor c and the DC contactor c are attracted, so that the station microgrid and the battery group b form a path, and the AC contactor c and the DC contactor c feedback the contactor status to the controller 5 to complete the charging logic of the battery group b.

[0057] Based on the above, it can be known that in the embodiment of the present disclosure, through the communication module communicating with the charging module compartment 6, the input and output control board controls the DC contactor according to the instructions issued by the communication module, and can control the switching of each contactor in the DC contactor according to the data feedback from the charging module compartment 6.

[0058] The charging module compartment 6 and the battery compartment 4 can also be connected in other forms. In an optional embodiment, the charger also includes: a second contactor matrix 7; the second contactor matrix 7 is used to connect the charging module compartment 6 and the battery compartment 4; the charging module compartment 6 includes multiple charging module groups, and the second contactor matrix 7 includes second contactor groups equal to the number of charging module groups. The charging module groups are connected to the second contactor groups in a one-to-one correspondence, and the number of battery groups connected to each second contactor group decreases in sequence from the total number of battery groups.

[0059] In the disclosed embodiment, the second contactor matrix 7 connects the charging module compartment 6 and the battery compartment 4. Since the charging module compartment 6 and the battery compartment 4 are connected in a trapezoidal connection in the present application, the second contactor matrix 7 is a trapezoidal matrix. The second contactor matrix 7 includes second contactor groups equal to the number of charging module groups. The charging module groups are connected to the second contactor groups in a one-to-one correspondence. The battery compartment 4 includes multiple battery groups, and the number of battery groups connected to each second contactor group decreases in sequence from the total number of battery groups. In other words, the first group of charging module groups is fully connected to the battery group through the corresponding second contactor group, and each subsequent group of charging module groups is connected to one less battery group than the previous group. This connection method saves a part of the contactor while ensuring the arbitrary switching function between the charging module group and the battery group.

[0060] Exemplarily, the charging module compartment 6 is provided with a total of M groups of charging module groups, each group of charging module groups is provided with m charging modules, the m charging modules in the same charging module group are arranged in parallel, and the three-phase AC power is respectively connected to each parallel charging module. Correspondingly, the second contactor matrix 7 includes M second contactor groups, the battery compartment 4 is provided with N groups of battery groups, one group of battery groups is connected to one DC bus, the first second contactor group includes N contactors, the first group of charging module groups is fully connected to the N DC buses corresponding to the N groups of battery groups through the N contactors of the first second contactor group, the second second contactor group includes N-1 contactors, the second group of charging module groups is connected to the N-1 DC buses corresponding to the N-1 groups of battery groups through the N-1 contactors of the second second contactor group, and each subsequent group of charging module groups is connected to one less DC bus of the battery group than the previous group, until the last group of charging module groups is connected to the N-M+1 DC buses corresponding to the N-M+1 groups of battery groups through the N-M+1 contactors of the last second contactor group.

[0061] Based on the above, it can be known that in the embodiment of the present disclosure, the charging module groups are connected one-to-one with the second contactor groups, and the number of battery groups connected to each second contactor group is connected in descending order from the total number of battery groups. This allows the correspondence between the charging module groups and the battery groups to be freely adjusted through the switches of the second contactor matrix, and allows for arbitrary switching between the charging module groups and the battery groups through as few contactor configurations as possible. This reduces the number of contactors used to save costs while allowing for more flexible configuration of the connection between the charging module groups and the battery groups.

[0062] Figure 5 FIG. 1 is a schematic diagram showing another connection relationship of a controller 5 according to an exemplary embodiment. In an optional embodiment, when the charging module compartment 6 is connected to the battery compartment 4 via the second contactor matrix 7, as shown in FIG. Figure 5 As shown, the communication module in the controller 5 of the charger is also used to realize communication with the charging module compartment 6; the input and output control board of the controller 5 is also connected to the second contactor matrix 7, and the input and output control board is used to control the second contactor matrix 7 according to the instructions issued by the communication module.

[0063] In the disclosed embodiment, the communication module can also realize communication with the charging module compartment 6. Specifically, the communication channels of the charging module compartment 6, the bidirectional module compartment 2, the battery compartment 4 and the communication module are independent of each other, and the communication module communicates with the charging module compartment 6 through the CAN1 communication channel. The communication content between the charging module compartment 6 and the communication module can be the use status, real-time voltage, real-time current and other information of each charging module group in the charging module compartment 6.

[0064] The input-output control board is also connected to the second contactor matrix 7. Specifically, the AC contactor group 1 is connected to the fourth group of DI ports and DO ports of the input-output control board, wherein the second contactor matrix 7 transmits the feedback of the contactor to the input-output control board through the DI port, and the second contactor matrix 7 receives the control signal transmitted by the input-output control board through the DO port.

[0065] The controller 5 can control the AC contactor group 1 and the second contactor matrix 7 based on the scheduling algorithm configured by itself or interact with the remote control system according to the communication information transmitted by the charging module compartment 6 and the battery compartment 4 to realize power supply for the battery in the battery compartment 4. For example, when the information transmitted by the charging module compartment 6 and the battery compartment 4 to the controller 5 indicates that the charging module group c in the charging module compartment 6 is in an idle state and the battery group b is insufficient, the controller 5 can dispatch the charging module group c to the battery group b for charging. Specifically, a control signal can be sent to the AC contactor c connecting the charging module group c and the station microgrid and the second contactor group c corresponding to the charging module group c, so that the AC contactor c is attracted, the contactor connecting the charging module group c and the battery group b in the second contactor group c is attracted, and the other contactors in the second contactor group c remain disconnected, so that the station microgrid and the battery group b form a path, and the AC contactor c and the second contactor group c feedback the contactor status to the controller 5 to complete the charging logic of the battery group b.

[0066] Based on the above, it can be known that in the embodiment of the present disclosure, through the communication module communicating with the charging module compartment 6, the input and output control board controls the second contactor matrix 7 according to the instructions issued by the communication module, and can control the switching of each contactor in the second contactor matrix 7 according to the data fed back by the charging module compartment 6.

[0067] In a second aspect, the present disclosure further provides a charging station, which includes the above-mentioned charger.

[0068] The assembly process of the charger at the charging station is as follows: according to the number of battery groups in the battery compartment (the number of DC bus lines), determine the number of DC contactors in the charging module compartment; based on control complexity and cost considerations, a power supply mode in which a group of charging module groups is fixed to supply power to one battery group can be selected, and according to the maximum charging power of the battery compartment and the maximum output power of a single module, the number of charging module groups is determined to complete the configuration of the charging module compartment, and the DC output of the charging module compartment is connected to the DC bus one by one; considering the discharge power demand of the station, the maximum discharge power of the battery compartment and the maximum discharge power of the bidirectional module, the number of bidirectional module groups and the number of modules in each group in the bidirectional module compartment are determined to complete the design of the bidirectional module compartment; the number of bidirectional module groups and the number of battery groups are determined by the number of bidirectional module groups and the number of modules in each group The number of DC busbars (the number of DC busbars) is used to design the contactor matrix connecting the bidirectional module compartment and the battery compartment, and connect them to the DC busbars; the number of AC contactors is determined by the sum of the number of charging module groups and the number of bidirectional module groups; the charging module compartment, the bidirectional module compartment, and the battery compartment are divided into three CAN buses, which are respectively connected to the three CAN ports of the communication module, and the communication module is connected to the input and output control board through the serial port; the feedback of all contactors in the charger is respectively connected to the DI port of the input and output control board, and all control signal receiving ports are respectively connected to the DO port of the IO board; one-phase AC input is taken and connected to the voltage conversion module to power the communication module and the input and output control board; the network port of the communication module is connected to the station control LAN or external network to complete the station control protocol or cloud platform protocol development.

[0069] In the embodiments of the present application, the term "module" or "unit" refers to a computer program or a part of a computer program with a predetermined function, and works together with other related parts to achieve a predetermined goal, and can be implemented in whole or in part by using software, hardware such as processing circuits or memories, or a combination thereof. Similarly, one processor or multiple processors or memories can be used to implement one or more modules or units. In addition, each module or unit can be part of an overall module or unit that includes the function of the module or unit.

[0070] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0071] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A charger, characterized in that: The charger comprises: an AC contactor group (1), a bidirectional module compartment (2), a first contactor matrix (3) and a battery compartment (4); The AC contactor group (1) is used to connect the bidirectional module compartment (2) and the station microgrid; The bidirectional module compartment (2) is used to provide electric energy to the battery compartment (4) or to invert the electric energy of the battery compartment (4) into the station microgrid; The first contactor matrix (3) is used to connect the bidirectional module compartment (2) and the battery compartment (4); the bidirectional module compartment (2) includes a plurality of bidirectional module groups; the first contactor matrix (3) includes a number of first contactor groups equal to the number of the bidirectional module groups; the battery compartment (4) includes a plurality of battery groups; the bidirectional module groups are connected to the first contactor groups in a one-to-one correspondence; the number of battery groups connected to each of the first contactor groups decreases in sequence from the total number of battery groups.

2. The charger according to claim 1, characterized in that: The charger further comprises: a controller (5); The controller (5) is used to change the connection relationship between each of the bidirectional module groups and each of the battery groups by controlling the on and off of switches in each of the first contactor groups.

3. The charger according to claim 2, characterized in that: The controller (5) comprises: a communication module and an input / output control board; The communication module is used to realize communication with the bidirectional module compartment (2) and the battery compartment (4); The input-output control board is respectively connected to the communication module, the AC contactor group (1) and the first contactor matrix (3), and the input-output control board is used to control the AC contactor group (1) and the first contactor matrix (3) according to instructions sent by the communication module.

4. The charger according to claim 3, characterized in that: The controller (5) further comprises: a voltage conversion module; The voltage conversion module is used to convert the mains electricity into the voltage required by the controller (5), and to supply power to the communication module and the input / output control board.

5. The charger according to claim 1, characterized in that: The charger further comprises: a charging module compartment (6); The charging module compartment (6) is used to supply power to the battery compartment (4); The power input end of the charging module compartment (6) is connected to the station microgrid via the AC contactor group (1), and the power output end of the charging module compartment (6) is connected to the battery compartment (4).

6. The charger according to claim 5, characterized in that: The charging module compartment (6) comprises a number of charging module groups and DC contactors equal to the number of battery groups; Each charging module group is connected to a corresponding battery group in a one-to-one correspondence through a corresponding DC contactor.

7. The charger according to claim 6, characterized in that: The communication module in the controller (5) of the charger is also used to realize communication with the charging module compartment (6); The input / output control board of the controller (5) is also connected to the DC contactor, and the input / output control board is used to control the DC contactor according to the instructions sent by the communication module.

8. The charger according to claim 5, characterized in that: The charger further comprises: a second contactor matrix (7); The second contactor matrix (7) is used to connect the charging module compartment (6) and the battery compartment (4); the charging module compartment (6) includes a plurality of charging module groups, the second contactor matrix (7) includes a number of second contactor groups equal to the number of the charging module groups, the charging module groups are connected to the second contactor groups in a one-to-one correspondence, and the number of battery groups connected to each second contactor group is decreased in sequence from the total number of battery groups.

9. The charger according to claim 8, characterized in that: The communication module in the controller (5) of the charger is also used to realize communication with the charging module compartment (6); The input-output control board of the controller (5) is also connected to the second contactor matrix (7), and the input-output control board is used to control the second contactor matrix (7) according to the instructions sent by the communication module.

10. A charging station, characterized in that: The charging station comprises a charger according to any one of claims 1 to 9.

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