Charging systems for battery swap stations or energy storage stations

Abstract

The present invention discloses a charging system for a battery swap station or an energy storage station, the charging system comprising at least two charging modules, a battery charging port and a control module, the at least two charging modules being connected in parallel; the control module being used to call different numbers of the charging modules and / or control the output power of each charging module, and to charge quick-change batteries through the battery charging port. In the present invention, different numbers of charging modules can be called according to different charging requirements of the battery, and the output power of the charging module can also be controlled according to different charging requirements of the battery. This not only allows efficient and rapid centralized charging of batteries with high charging requirements, but also reasonably distributes electrical energy, improves charging efficiency, and further meets the needs of users to replace batteries in a timely manner, thereby improving the user's experience of battery swapping at the battery swap station.

Description

[0001] This application is a divisional application of the invention patent with application date of December 28, 2020, application number 2020115834317, and invention name "Charging system for battery swap station or energy storage station". Technical Field

[0002] The present invention relates to the field of new energy vehicles, and in particular to a charging system for a battery swap station or an energy storage station. Background Art

[0003] As a new energy means of transportation, electric vehicles have the characteristics of low noise, high energy efficiency and no tail gas emissions. They have become one of the rapidly developing emerging industries in recent years.

[0004] Energy supply is an important link in the electric vehicle industry chain, and the energy supply model is closely related to the development of electric vehicles. For electric vehicles, since their energy source is batteries, they need to be charged every once in a while to replenish the power. At present, most electric vehicles in my country are charged by the public power grid. When charging the battery, each charger corresponds to each quick-change battery, and each charger provides power to the battery corresponding to its number. In this one-to-one charging method, on the one hand, when a battery is full, the corresponding charger stops working, and at the same time, the battery that needs to be charged urgently cannot be replenished in time; on the other hand, when a charger fails, the corresponding charging position cannot be used, or the system will still charge the battery through the failed charger.

[0005] The utility model patent with the authorization announcement number CN209305379U discloses a split-type battery swap station, including a charging device as a whole, wherein the charging device includes a power distribution port, a power control module and different types of charging terminals, and the power control module controls the output power distribution to charge charging terminals such as battery packs. In this way, although the flexibility of power distribution is improved to a certain extent, its essence is still to charge charging terminals such as battery packs one by one based on the original total charging power. When a charger fails, the battery corresponding to the charger cannot be supplied with power. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the defect in the prior art that each charger unidirectionally charges the battery corresponding to its number, and to provide a charging system for a battery swap station or energy storage station that can adjust the number of charging modules, the output power and the corresponding quick-change batteries according to the status of the battery or charging module.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] The present invention provides a charging system for a battery swap station or an energy storage station, the charging system comprising at least two charging modules, a battery charging port and a control module, the at least two charging modules being connected in parallel;

[0009] The control module is used to call different numbers of the charging modules and / or control the output power of each charging module, and charge the quick-change battery through the battery charging port.

[0010] In the present invention, different numbers of charging modules can be called according to the different charging requirements of the battery, and the output power of the charging module can also be controlled according to the different charging requirements of the battery. Not only can the batteries with high charging requirements be charged efficiently and quickly, but the electric energy is also reasonably allocated, the charging efficiency is improved, and the user's need to replace the battery in time is further met, thereby improving the user's battery replacement experience at the battery replacement station.

[0011] Preferably, the control module is used to call different numbers of the charging modules and control the output power of each charging module according to the charging requirements of the quick-change battery, and charge the quick-change battery through the battery charging port to meet the charging requirements.

[0012] The control module may call different numbers of the charging modules and control the output power of each charging module according to the current power of the quick-change battery being charged and / or the current state of each charging module.

[0013] In the present invention, according to the charging demand of the quick-change battery, a corresponding number of charging modules are flexibly called and the output power of the charging modules is controlled, so that the use efficiency of each charging module is improved to the greatest extent.

[0014] In the present invention, electric energy can be distributed to the battery that needs charging the most, which not only enhances the flexibility of charging, but also solves the inefficiency of the one-to-one, fixed charging mode in the prior art, and further improves the charging efficiency.

[0015] Preferably, each charging module has a first output interface, and the first output interfaces of the at least two charging modules are connected in parallel via a shunt or a contactor, and the control module controls the calling of different numbers of the charging modules by controlling the shunt or the contactor.

[0016] Wherein, each charging module has a first input interface, and the first input interfaces of the at least two charging modules can also be centrally powered by an external power supply by being connected in parallel through a common bus.

[0017] In the present invention, by connecting the output interfaces of the charging modules in parallel, not only can the charging modules be controlled to provide electrical energy to the battery according to the needs of the battery, but multiple charging modules can also be used to centrally supply power to the battery to be charged to maximize the efficiency of the charging modules.

[0018] Preferably, the control module is also used to disconnect the electrical connection between the charging module and the battery charging port after the quick-change battery is charged, and instruct the called charging module to stop output.

[0019] In the present invention, after charging is completed, by controlling the disconnection of electrical connection and stopping the output of electric energy, not only ineffective electric energy output is avoided, electric energy is saved, and charging efficiency is improved, but also the reliability of the overall circuit is improved and the safety of the charging system is guaranteed.

[0020] Preferably, the charging system further includes a monitoring module, a calculation module and a centralized control module;

[0021] The monitoring module is used to monitor the current battery parameters of each of the quick-change batteries in the station;

[0022] The calculation module is used to obtain the charging requirement of each quick-change battery in the current station according to the current battery parameters;

[0023] The centralized control module is used to instruct the control module to call different numbers of the charging modules to the battery charging output port corresponding to each quick-change battery according to the charging requirements of each quick-change battery, and adjust the output power of each called charging module so that each battery charging output port outputs an output power suitable for charging each quick-change battery.

[0024] The station refers to a battery swap station.

[0025] In the present invention, different charging requirements are calculated for each battery based on the parameters of each quick-change battery monitored, and the number of charging modules, the corresponding output power and the corresponding power supply batteries are further controlled. This not only changes the one-to-one charging mode of the original battery swap station, but also reasonably allocates the electric energy of the entire battery swap station, thereby improving the charging efficiency of the entire battery swap station.

[0026] Preferably, the charging system further comprises an AC power supply module or a DC power supply module;

[0027] The AC power supply module includes an AC / DC (alternating current / direct current) converter, the input end of the AC / DC converter is connected to the power grid, and the output end of the AC / DC converter is connected to the charging module; the AC / DC converter is used to convert the alternating current output by the power grid into direct current and adjust the voltage of the direct current;

[0028] The DC power supply module includes a power generation device and a unidirectional DC / DC (direct current / direct current) converter, the input end of the unidirectional DC / DC converter is connected to the power generation device, and the output end of the unidirectional DC / DC converter is connected to the charging module; the unidirectional DC / DC converter is used to adjust the voltage of the direct current output by the power generation device; or,

[0029] The DC energy supply module includes a power generation device, a unidirectional DC / DC converter, an energy storage device and a bidirectional DC / DC converter. The input end of the unidirectional DC / DC converter is connected to the power generation device, and the output end of the unidirectional DC / DC converter is respectively connected to the energy storage device and the charging module. One end of the bidirectional DC / DC converter is connected to the energy storage device, and the other end of the bidirectional DC / DC converter is respectively connected to the power generation device and the charging module; the unidirectional DC / DC converter is used to adjust the voltage of the DC power output by the power generation device; the bidirectional DC / DC converter is used to adjust the voltage of the DC power output by the unidirectional DC / DC converter, or the bidirectional DC / DC converter is used to adjust the voltage of the DC power output by the energy storage device.

[0030] The present invention provides a variety of ways to utilize energy, including directly connecting to the power grid to utilize public AC power, or utilizing DC power provided by an energy storage device or a power generation device, thereby increasing the availability and applicability of the charging system.

[0031] In the present invention, through the optimized configuration of the storage device, it is possible to achieve a basic balance between local energy production and energy load and solve the charging needs of new energy vehicles. It is also possible to maximize the organic combination of environmental protection and energy utilization through the use of power generation devices including clean energy such as photovoltaics and wind power.

[0032] Preferably, the charging system further comprises an AC power supply module and an energy storage power supply module; the AC power supply module comprises a bidirectional AC / DC converter, and the energy storage power supply module comprises an energy storage device and a bidirectional DC / DC converter;

[0033] The AC end of the bidirectional AC / DC converter is connected to the power grid, the DC end of the bidirectional AC / DC converter is respectively connected to the charging module and one end of the bidirectional DC / DC converter, one end of the bidirectional DC / DC converter is also connected to the charging module, and the other end of the bidirectional DC / DC converter is connected to the energy storage device;

[0034] The bidirectional AC / DC converter is used to convert the alternating current output by the power grid into direct current, and adjust the voltage of the direct current; or, the bidirectional AC / DC converter is used to convert the direct current output by the charging module and / or the direct current output by the bidirectional DC / DC converter into alternating current, and adjust the voltage of the alternating current;

[0035] The bidirectional DC / DC converter is used to adjust the voltage of the direct current output by the energy storage device; or, the bidirectional DC / DC converter is used to adjust the voltage of the direct current output by the bidirectional AC / DC converter.

[0036] In the present invention, the bidirectional AC / DC converter can convert the AC power directly output by the power grid into DC power, and can also convert the DC power output by the charging module and the power generation device into AC power, and can further adjust the effective voltage of the converted AC power or DC power.

[0037] Preferably, the monitoring module is also used to monitor the current state of the power grid;

[0038] When the current state of the power grid is a low power consumption valley, the centralized control module is further used to instruct the control module to control the charging module to only receive the power output by the power grid and increase the output power of the output port, or, at the same time, instruct the energy storage device to receive the power output by the power grid;

[0039] When the current state of the power grid is at a peak power consumption, the centralized control module is further used to instruct the control module to control the power grid to stop outputting power to the charging module, and to control the energy storage device to output power to the charging module; or,

[0040] The centralized control module is also used to instruct the control module to control the power grid to stop outputting power to the charging module when the current state of the power grid is at a peak power consumption and the number of the quick-change batteries that have completed charging reaches a fully charged battery threshold, and at the same time control the energy storage device and the first number of quick-change batteries to output electric energy to the power grid respectively.

[0041] In the present invention, by monitoring the status of the power grid at different periods such as the low power consumption and the peak power consumption, the charging mode can be adjusted in combination with the charging demand of the quick-change battery, which can not only absorb the excess electricity during the low power consumption period, but also reduce the power transmission pressure of the power grid during the peak power consumption period.

[0042] Preferably, the charging system further comprises a DC power supply module;

[0043] The DC energy supply module includes a power generation device and a unidirectional DC / DC converter, the input end of the unidirectional DC / DC converter is connected to the power generation device, and the output end of the unidirectional DC / DC converter is respectively connected to the charging module, one end of the bidirectional DC / DC converter and the DC end of the bidirectional AC / DC converter;

[0044] The unidirectional DC / DC converter is used to adjust the voltage of the direct current output by the power generation device;

[0045] The bidirectional DC / DC converter is also used to adjust the voltage of the direct current output by the unidirectional DC / DC converter;

[0046] The bidirectional AC / DC converter is also used to convert the direct current output by the unidirectional DC / DC converter into alternating current and adjust the voltage of the alternating current.

[0047] In the present invention, by connecting the unidirectional DC / DC converter and the bidirectional DC / DC converter in the DC energy supply module, and connecting the unidirectional DC / DC converter and the bidirectional AC / DC converter, not only can the DC voltage output by the power generation device be further adjusted, but the electric energy after the voltage adjustment can also be further shared with the energy storage device for storage and standby, and the DC power output by the power generation device can also be converted into AC power for reverse propagation to the power grid, thereby further reducing the pressure on the power grid during peak power consumption periods.

[0048] Preferably, the monitoring module is also used to monitor the current state of the power grid;

[0049] When the current state of the power grid is a low power consumption valley, the centralized control module is further used to instruct the control module to control the charging module to only receive the power output from the power grid, control the power generation device to only output power to the energy storage device, and increase the output power of the output port, or, at the same time, instruct the energy storage device to also receive the power output from the power grid;

[0050] When the current state of the power grid is at a peak power consumption, the centralized control module is further used to instruct the control module to control the power grid to stop outputting power to the charging module, and to control the energy storage device and / or the power generation device to output power to the charging module and / or the power grid; and / or,

[0051] The centralized control module is also used to instruct the control module to control the power grid to stop outputting power to the charging module when the number of the quick-change batteries that have completed charging reaches a fully charged battery threshold, and at the same time control the energy storage device, the power generation device and the first number of quick-change batteries to output electric energy to the power grid respectively.

[0052] In the present invention, by monitoring the status of the power grid at different periods such as the low power consumption and the peak power consumption, as well as the number of fully charged batteries, the direction of power output of the energy storage device and the power generation device can be flexibly controlled to maximize the use of green energy, while also helping the power grid to perform peak load shifting and valley filling.

[0053] Preferably, the at least two charging modules are conventional charging modules; the charging system further comprises at least one redundant charging module, wherein the redundant charging modules are respectively connected in parallel with the conventional charging modules and are respectively connected to each of the battery charging ports through switches.

[0054] In the present invention, by setting a redundant charging module and a corresponding switch, the control module can call the redundant charging module to charge the quick-change battery by closing the control switch. On the one hand, when the conventional charging module corresponding to the quick-change battery fails, the normal charging of the quick-change battery can be guaranteed. On the other hand, the charging efficiency of the quick-change battery can also be improved through the cooperation between the redundant charging module and the conventional charging module.

[0055] Preferably, the control module is used to call the conventional charging module in the conventional charging mode and charge the quick-change battery through the battery charging port;

[0056] The control module is also used to call the redundant charging module in a special charging mode and charge the quick-change battery through the battery charging port.

[0057] In the present invention, by setting up and calling redundant batteries, it is possible to meet the charging needs of quick-swap batteries and improve the charging efficiency of quick-swap batteries, further enhancing the user's battery swap experience at battery swap stations or energy storage stations.

[0058] Preferably, the special charging mode includes a failure of one of the conventional charging modules, and the control module is used to close one of the switches to call the redundant charging module to charge the quick-change battery corresponding to the failed conventional charging module through the battery charging port; and / or,

[0059] The special charging mode includes the control module receiving a boost charging instruction, and the control module is used to call the redundant charging module and at least one of the conventional charging modules to charge the quick-change battery that needs boost charging through the battery charging port.

[0060] In the present invention, when it is necessary to increase the charging rate of the quick-change battery and the conventional charging module cannot meet the charging demand of the quick-change battery, the control module can call the redundant charging module to charge the quick-change battery together with the conventional charging module to speed up the charging speed and improve the charging efficiency; and, when the conventional charging module fails, the redundant charging module is called, so that the quick-change battery corresponding to the failed conventional charging module can be directly charged by the redundant charging module, without waiting for other conventional charging modules to charge the current quick-change battery before charging the quick-change battery corresponding to the failed conventional charging module.

[0061] The positive progressive effect of the present invention is that the charging system for a battery swap station or an energy storage station provided by the present invention can call different numbers of charging modules according to the different charging requirements of the battery, and can also control the output power of the charging module according to the different charging requirements of the battery. It can not only efficiently and quickly charge batteries with high charging requirements, reasonably distribute electrical energy, and improve charging efficiency, but also help the power grid to perform peak load shifting and valley filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 This is a module schematic diagram of a charging system for a battery swap station or an energy storage station in Example 1 of the present invention.

[0063] Figure 2 This is a module schematic diagram of a charging system for a battery swap station or an energy storage station in Embodiment 2 of the present invention.

[0064] Figure 3 This is a schematic diagram of some modules of a charging system for a battery swap station or an energy storage station in Example 3 of the present invention.

[0065] Figure 4 This is a schematic diagram of an AC power supply module of a charging system for a battery swap station or an energy storage station in Embodiment 4 of the present invention.

[0066] Figure 5 This is a schematic diagram of a DC energy supply module of a charging system for a battery swap station or an energy storage station in Embodiment 4 of the present invention.

[0067] Figure 6 This is a schematic diagram of a DC energy supply module of a charging system for a battery swap station or an energy storage station in Example 5 of the present invention.

[0068] Figure 7 This is a schematic diagram of the circuit structure of a charging system for a battery swap station or an energy storage station in Example 9 of the present invention. DETAILED DESCRIPTION

[0069] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0070] Example 1

[0071] This embodiment provides a charging system for a battery swap station or an energy storage station, such as Figure 1 As shown, the charging system includes a first charging module 101 , a second charging module 102 , a first battery charging port 104 , a second battery charging port 105 and a control module 103 .

[0072] The first charging module 101 and the second charging module 102 are connected in parallel.

[0073] The control module 103 is used to call different numbers of charging modules and / or control the output power of each charging module, and charge the first quick-change battery 106 and the second quick-change battery 107 through the first battery charging port 104 and the second battery charging port 105 .

[0074] It should be understood that the present embodiment only illustrates two charging modules by way of example and should not be construed as a limitation. In specific practice, it is necessary to customize the number of charging modules according to different battery swap station models, requirements, structures and practicality, and dynamically adjust the output power of each charging module. For example, if the power supply demand of the battery swap station or energy storage station is relatively small, 1-5 single-group charging modules of 40 kW can be set to form a minimum unit of a conventional distributed charging system.

[0075] The charging system for a battery swap station or energy storage station provided in this embodiment can call different numbers of charging modules according to the different charging requirements of the battery, and can also control the output power of the charging module according to the different charging requirements of the battery. It can not only efficiently and quickly charge batteries with high charging requirements, but also reasonably distribute electrical energy, improve charging efficiency, and further meet the user's need to replace batteries in a timely manner, thereby enhancing the user's battery replacement experience at the battery swap station or energy storage station.

[0076] Example 2

[0077] This embodiment provides a charging system for a battery swap station or an energy storage station, such as Figure 2 As shown, the charging system includes a control module 203, a first charging module 201, a second charging module 202, a first charging compartment 204, a second charging compartment 205 and a third charging compartment 206, wherein each charging compartment corresponds to a battery charging port, and the control module 203 is used to call different numbers of charging modules and / or control the output power of each charging module, and charge the first quick-change battery 207, the second quick-change battery 208 and the third quick-change battery 209 through the battery charging port.

[0078] Among them, how many charging modules are used to allocate the corresponding power of electricity to how many batteries, how many batteries each charging module corresponds to or how many charging modules one battery corresponds to all need to be dynamically adjusted according to actual needs.

[0079] In order to enable the charging module to flexibly and dynamically allocate electric energy of appropriate power to the quick-change battery, each charging module has a first output interface, and the first output interfaces of the first charging module 201 and the second charging module 202 are connected in parallel through a shunt or a contactor, and the control module 203 controls the calling of different numbers of charging modules by controlling the shunt or the contactor. In addition, each charging module has a first input interface, and the first input interfaces of the first charging module 201 and the second charging module 202 can also be centrally powered by an external power supply by sharing a busbar in parallel.

[0080] Among them, the control module 203 can also call different numbers of charging modules and control the output power of each charging module according to the charging requirements of each quick-change battery, and charge the quick-change battery through the battery charging port to meet the charging requirements of each quick-change battery. Assuming that the output power of the two charging modules is 40kw, and the control module 203 receives a charging power of 60kw required by a quick-change battery, then the control module 203 needs to call these two charging modules to charge the quick-change battery at the same time, and adjust the output power of the two charging modules to 30kw, or the output power of one charging module is 40kw and the output power of the other charging module is 20kw.

[0081] Among them, in order to make the charging system in this embodiment safer and more reliable, the control module 203 can also disconnect the electrical connection between the charging module and the quick-change battery charging port after the quick-change battery is charged, and instruct the called charging module to stop output.

[0082] It should be understood that the present embodiment only illustrates two charging modules, three charging compartments including corresponding battery charging ports, and three corresponding quick-change batteries for charging by way of example, but it should not be limiting. In specific practice, the number of charging modules and charging devices including battery charging ports needs to be customized according to the models and requirements of different battery swap stations or energy storage stations.

[0083] In order to better understand the present embodiment, a specific example is given below to illustrate the present embodiment:

[0084] Assume that the charging system in practice includes two charging modules, namely the first charging module 201 and the second charging module 202, and the charging system needs to charge two quick-change batteries, namely the first quick-change battery 207 and the second quick-change battery 208. Currently, a large number of charging stations (or energy storage stations) or swap stations (or energy storage stations) on the market use a one-to-one wiring form to power the charging module (charging pile), and the output end is also one-to-one. This method can only charge the charging module and the first quick-change battery 207 in correspondence, and the use efficiency is relatively low. In this embodiment, in the swap station, charging units with different modules and powers can be designed and matched according to customer needs, swap station layout, power supply capacity, etc. For example, if the power supply capacity of the battery swap station is small and the battery swap volume is 300 to 400 batteries per day, and the charging demand is not particularly high, we can choose a charging module with a power of 30kw, and use two charging modules to form a minimum distributed charging unit. The input of the two charging modules uses AC to share a busbar in parallel, and the output is first connected in parallel to the corresponding charging base modules through a shunt (or contactor). The minimum distributed unit composed of this can have the following four different output properties:

[0085] 1. The first charging module 201 and the second charging module 202 charge the corresponding first quick-change battery 207 and the second quick-change battery 208 respectively.

[0086] 2. The first charging module 201 and the second charging module 202 both charge the first quick-change battery 207. If the current state of the second quick-change battery 208 is fully charged, at this time, the second charging module 202 is in an idle standby state. On the contrary, the power of the first quick-change battery 207 is low but the charging demand is urgent. Therefore, at this time, the control module 203 can control the first charging module 201 and the second charging module 202 to charge the first quick-change battery 207 at the same time.

[0087] 3. The first charging module 201 and the second charging module 202 both charge the second quick-change battery 208. If the current state of the first quick-change battery 207 is fully charged, at this time, the first charging module 202 is in an idle standby state. On the contrary, the power of the second quick-change battery 208 is low but the charging demand is urgent. Therefore, at this time, the control module can control the first charging module 201 and the second charging module 202 to charge the second quick-change battery 208 at the same time.

[0088] 4. Since the first charging module 201 (or the second charging module 202) fails, the control module 203 can control the charging modules that have not failed to charge the first quick-change battery 207 and the second quick-change battery 208 separately in sequence.

[0089] According to the above method, a variety of distributed units can be laid out to form a charging network that meets the needs.

[0090] It should be understood that if the battery swap station has a large amount of battery swaps and a high demand for charging, a higher-power charging module can be selected. Accordingly, a larger number of charging modules can be provided in each charging unit, or a larger number of charging units can be provided in the entire charging system for the battery swap station or energy storage station to meet the charging needs.

[0091] In this embodiment, the charging system used for the battery swap station or energy storage station can be customized to meet the corresponding needs according to the models and requirements of different battery swap stations or energy storage stations. The charging system can use the characteristics of centralized charging to concentrate the empty point charging modules to charge the quick-change batteries that are in urgent need of electricity to maximize the efficiency of the charging modules.

[0092] This embodiment improves the reliability of the charging system used in the battery swap station or energy storage station. In the distributed battery swap station or energy storage station, modular centralized management is achieved by integrating the charging system of a single charging mode through the charging module control microprocessor and sharing the battery data of each charging unit. The charging power can be freely allocated within a certain range. The charging process completely avoids the substantial problem of affecting charging and customer operations due to failure when a distributed single charging module charges a single corresponding battery, thereby achieving a reliable and stable operation effect.

[0093] The charging system in this embodiment adopts a standardized, modular, integrated, serialized and customized design. The controllers in the charging system all adopt the concept of the Internet of Everything, so that each charging module can communicate and realize data transmission. When it is necessary to add or remove certain charging modules, the newly added charging units can be conveniently and quickly connected to the charging system network, or removed from the charging system network without affecting the work of other charging units.

[0094] In this embodiment, different numbers of charging modules are called according to the different charging requirements of the battery, and the output power of the charging module can also be controlled according to the different charging requirements of the battery. This not only can efficiently and quickly charge the batteries with high charging requirements, but also reasonably allocates electrical energy, improves charging efficiency, and further meets the user's need to replace batteries in a timely manner, thereby enhancing the user's battery replacement experience at the battery swap station.

[0095] In this embodiment, not only can electric energy be distributed to the battery that needs charging the most, but it can also avoid the situation where a faulty charging module is still charging the battery to be charged. This not only enhances the flexibility of charging, but also solves the inefficiency of the one-to-one, fixed charging mode in the prior art, and further improves the charging efficiency.

[0096] In this embodiment, after charging is completed, by controlling the disconnection of electrical connection and stopping the power output, not only invalid power output is avoided, power is saved, and charging efficiency is improved, but also the reliability of the overall circuit is improved and the safety of the charging system is ensured.

[0097] Example 3

[0098] This embodiment provides a charging system for a battery swap station or an energy storage station. This embodiment is a further improvement on Embodiment 2. Figure 3 As shown, the charging system of this embodiment further includes a monitoring module 301 , a calculation module 302 and a centralized control module 303 .

[0099] Among them, the monitoring module 301 is used to monitor the current battery parameters of each quick-change battery in the battery swap station or energy storage station.

[0100] The calculation module 302 is used to obtain the charging requirements of each quick-change battery in the current battery swap station or the current energy storage station according to the current battery parameters.

[0101] The centralized control module 303 is used to instruct the control module 203 to call different numbers of charging modules for the battery charging output port corresponding to each quick-change battery according to the charging requirements of each quick-change battery, and adjust the output power of each called charging module so that each battery charging output port outputs an output power suitable for charging each quick-change battery.

[0102] The monitoring module 301 may monitor the current battery parameters of each quick-change battery through a BMS (battery management system).

[0103] In order to better understand the present embodiment, a specific example is given below to illustrate the present embodiment: if the current power output is limited but the number of batteries to be charged is large, and the monitoring module 301 monitors that the charging demands of the batteries to be charged are not high, the current power can be calculated by the calculation module 302 to be evenly distributed to each battery to be charged. For example, the centralized control module 303 can control each battery to reduce the power and increase the charging time to meet the charging demand of each battery. For example, the monitoring module 301 monitors that there are some batteries with high charging demands among the batteries to be charged, such as a battery that needs to be used after one hour. The calculation module 302 can calculate the corresponding power output of the batteries with high charging demands. The centralized control module 303 first charges the batteries with high charging demands by increasing the output power. When the batteries are full, other batteries are charged.

[0104] In this embodiment, different charging requirements are calculated for each battery based on the parameters of each quick-change battery monitored, and the number of charging modules, the corresponding output power and the corresponding power supply batteries are further controlled. This not only changes the one-to-one charging mode of the original battery swap station, but also reasonably allocates the electric energy of the entire battery swap station, thereby improving the charging efficiency of the entire battery swap station.

[0105] Example 4

[0106] This embodiment provides a charging system for a battery swap station or an energy storage station. This embodiment is a further improvement on Embodiment 2 or Embodiment 3. The charging system in this embodiment also includes an energy supply module. The energy supply module in this embodiment may only include Figure 4 The AC power supply module shown may also include only Figure 5 The DC power supply module shown may also include Figure 4 The AC power supply module shown and Figure 5 The DC power supply module shown.

[0107] Among them, the AC power supply module includes an AC / DC converter 401, the input end of the AC / DC converter 401 is connected to the power grid, the output end of the AC / DC converter is connected to the charging module, and the AC / DC converter is used to convert the AC power output from the power grid into DC power and adjust the voltage of the DC power.

[0108] The DC power supply module includes a power generation device 501 and a unidirectional DC / DC converter 502. The input end of the unidirectional DC / DC converter 502 is connected to the power generation device 501, and the output end of the unidirectional DC / DC converter 502 is connected to the charging module; the unidirectional DC / DC converter 502 is used to adjust the voltage of the DC power output by the power generation device 501.

[0109] Among them, power generation devices include clean energy power generation devices such as photovoltaics and wind power generation systems.

[0110] In this embodiment, a variety of ways of utilizing energy are provided. The charging system can be directly connected to the power grid to utilize public alternating current, or it can utilize direct current provided by a power generation device, thereby increasing the availability and applicability of the charging system.

[0111] Example 5

[0112] This embodiment provides a charging system for a battery swap station or an energy storage station. This embodiment is basically the same as Embodiment 4, except that: Figure 6As shown, the DC energy supply module in this embodiment also includes an energy storage device 503 and a bidirectional DC / DC converter 504. The input end of the unidirectional DC / DC converter 502 is connected to the power generation device 501, and the output end of the unidirectional DC / DC converter 502 is respectively connected to the energy storage device 503 and the charging module. One end of the bidirectional DC / DC converter 504 is connected to the energy storage device 503, and the other end of the bidirectional DC / DC converter 504 is respectively connected to the power generation device 501 and the charging module. The unidirectional DC / DC converter 502 is used to adjust the voltage of the DC power output by the power generation device 501, and the bidirectional DC / DC converter 504 is used to adjust the voltage of the DC power output by the unidirectional DC / DC converter 502, or the bidirectional DC / DC converter 504 is used to adjust the voltage of the DC power output by the energy storage device 503.

[0113] In this embodiment, a variety of ways to utilize energy are provided. The charging system can be directly connected to the power grid to utilize public AC power, or it can utilize DC power provided by an energy storage device or a power generation device, thereby increasing the availability and applicability of the charging system.

[0114] In this embodiment, through the optimized configuration of the energy storage device, it is possible to achieve a basic balance between local energy production and energy load and solve the charging needs of new energy vehicles. It is also possible to maximize the organic combination of environmental protection and energy utilization through the use of clean energy power generation devices including photovoltaics, wind power, etc.

[0115] Example 6

[0116] This embodiment provides a charging system for a battery swap station or an energy storage station. This embodiment is basically the same as Example 5, except that the AC / DC converter 401 in Example 5 is concretized as a bidirectional AC / DC converter. In addition, the charging system in this embodiment only includes an energy storage device 503 and a bidirectional DC / DC converter 504, and the energy storage device 503 and the bidirectional DC / DC converter 504 together constitute an energy storage supply module.

[0117] The AC end of the bidirectional AC / DC converter is connected to the power grid, and the DC end of the bidirectional AC / DC converter is respectively connected to the charging module and one end of the bidirectional DC / DC converter 504. One end of the bidirectional DC / DC converter 504 is also connected to the charging module, and the other end of the bidirectional DC / DC converter 504 is connected to the energy storage device 503.

[0118] The bidirectional AC / DC converter is used to convert the alternating current output by the power grid into direct current and adjust the voltage of the direct current; or, the bidirectional AC / DC converter is used to convert the direct current output by the charging module and / or the direct current output by the bidirectional DC / DC converter 504 into alternating current and adjust the voltage of the alternating current.

[0119] The bidirectional DC / DC converter 504 is used to adjust the voltage of the direct current output by the energy storage device; or, the bidirectional DC / DC converter is used to adjust the voltage of the direct current output by the bidirectional AC / DC converter.

[0120] In this embodiment, a bidirectional AC / DC converter can be used to convert the AC power output by the power grid into DC power for charging quick-change batteries or energy storage devices, and can also convert the DC power output by the charging module and the power generation device into AC power for reverse output to the power grid for peak shaving and valley filling.

[0121] In the present invention, through the optimized configuration of the energy storage device, it is possible to achieve a basic balance between local energy production and energy load and solve the charging needs of new energy vehicles. It is also possible to maximize the organic combination of environmental protection and energy utilization through the use of power generation devices including clean energy such as photovoltaics and wind power.

[0122] Example 7

[0123] This embodiment provides a charging system for a battery swap station or an energy storage station. This embodiment is an improvement made to Embodiment 5 or Embodiment 6. The monitoring module 301 in this embodiment is also used to monitor the current state of the power grid.

[0124] When the current state of the power grid is at a low power consumption, the centralized control module 303 is also used to instruct the control module 203 to control the charging module to only receive the power output from the power grid and increase the output power of the output port, or, at the same time, instruct the energy storage device to receive the power output from the power grid;

[0125] When the current state of the power grid is at a peak power consumption, the centralized control module 303 is also used to instruct the control module 203 to control the power grid to stop outputting power to the charging module, and to control the energy storage device 503 to output power to the charging module; or,

[0126] The centralized control module is also used to control the power grid to stop outputting power to the charging module when the current state of the power grid is at peak power consumption and the number of quick-change batteries that have completed charging reaches the fully charged battery threshold. The command control module 203 is used to control the power grid to stop outputting power to the charging module, and at the same time control the energy storage device 503 and the first number of quick-change batteries to output electric energy to the power grid respectively.

[0127] Among them, the monitoring module 301 can monitor the current grid parameters by connecting to the grid monitoring system and monitor the current battery swap station parameters through the CAN (control area network) bus. In addition, the monitoring module 301 can also obtain big data of all battery swap stations from the external cloud to optimize the current battery swap station.

[0128] Among them, the current state of the power grid includes different time periods such as peak power consumption and low power consumption. Since the electricity costs in different time periods are different, this embodiment can control the use of electric energy by monitoring different time periods to save costs and improve the efficiency of electric energy utilization.

[0129] Among them, the monitoring module 301 can also be connected to the Internet, using the Internet and the cloud platform of the battery swap station to realize real-time sharing of big data, and through the calculation module 302, calculate the personalized implementable plan for charging and swapping control at the battery swap station or energy storage station, and centrally manage the output of multiple information such as the working status, mode, and alarm of the charging modules in the station.

[0130] In this embodiment, the real-time data of each monitored battery can be collected in real time through the CAN bus, and the collected data can be summarized in combination with the current power consumption period of the station, the station-side battery replacement requirements of the current station, etc., so that the charging module can be controlled through the control module to output appropriate electrical energy to the corresponding battery.

[0131] In order to better understand the present embodiment, a specific example is given below to further illustrate the present embodiment:

[0132] Assume that the current battery swap station includes 3 charging units, and each charging unit 3 includes 5 charging modules. If the battery swap station is in the morning peak period of battery swap, such as 7:00-9:00, the power grid is also in the peak period of electricity consumption, and most of the batteries in the battery swap station are fully charged, normal low-power charging is sufficient to meet the battery swap demand. When an electric car comes to the battery swap station to replace the battery and charge the replaced low-power battery, the centralized control module will instruct to stop obtaining electricity from the power grid and only obtain electricity through the energy storage device and / or the power generation device. At the same time, the module can be controlled to charge the battery with the minimum power; after the morning peak, the power consumption of the power grid also turns to the normal period. The centralized control module will adjust the power of the charging module in time to charge the battery according to the current power and demand of the battery in the battery swap station. If the power of individual batteries is low and there are idle charging modules, other idle charging modules of the same charging unit will be enabled to increase the charging power of the battery to complete the charging as soon as possible. Of course, the increased charging power here is suitable for charging the battery. The power grid is also at its peak period of electricity consumption. It is also possible that the centralized control module will stop charging the quick-swap batteries in the battery swap station, and at the same time instruct a certain number of fully charged quick-swap batteries, energy storage devices and / or power generation devices to transmit power to the power grid, and then resume charging the quick-swap batteries after the peak period.

[0133] On the contrary, during the night when the electricity consumption is low, the demand for battery replacement is small and the period is long. The battery can be deeply charged with a small current to balance the battery cells, and the excess power can be used to charge the energy storage device. In this way, the "peak, peak, flat and valley" benefits of the power grid are utilized to reduce expenditures, which reduces the power supply pressure on the power grid and absorbs the excess power during the low-peak period.

[0134] In this embodiment, the charging module is modularly managed using a monitoring module, a computing module, and a centralized control module. Real-time monitoring is performed on various aspects such as grid load pressure, charging module safety status, battery health, current temperature, equipment operating status, and current operating pressure. Electric energy can be automatically and reasonably distributed to each battery, which not only improves the service capacity and operating efficiency of the battery swap station or energy storage station, but also reduces the operating cost of the charging station or energy storage station and the workload of the administrator, thereby improving the service quality and operating efficiency of the battery swap station or energy storage station and increasing customer revenue.

[0135] In this embodiment, by arranging a distributed charging network for the charging system used in the battery swap station or energy storage station, on the one hand, the equipment failure rate can be reduced and the maintenance cost can be greatly reduced. On the other hand, the charging method with adjustable charging power changes the original constant current charging method from beginning to end. The charging power and current are intelligently allocated in a timely manner according to the battery charging demand, grid load, and operating pressure, and energy is efficiently and reasonably allocated to achieve the goal of improving charging efficiency and efficient operation.

[0136] In this embodiment, different current parameters can be set according to the corresponding needs customized according to different battery swap station models and requirements, and the characteristics of concentrated charging can be greatly utilized to maximize the efficiency of the charging modules in the same charging unit.

[0137] Example 8

[0138] This embodiment provides a charging system for a battery swap station or an energy storage station. This embodiment is a further improvement on Embodiment 5.

[0139] The AC / DC converter in this embodiment is a bidirectional AC / DC converter.

[0140] In this embodiment, the input end of the unidirectional DC / DC converter is connected to the power generation device 501, and the output end of the unidirectional DC / DC converter 502 is respectively connected to the charging module, one end of the bidirectional DC / DC converter 504 and the DC end of the bidirectional AC / DC converter;

[0141] The unidirectional DC / DC converter 502 is used to adjust the voltage of the direct current output by the power generation device 501 .

[0142] The bidirectional DC / DC converter 504 is further configured to adjust the voltage of the direct current output by the unidirectional DC / DC converter 504 .

[0143] The bidirectional AC / DC converter is also used to convert the direct current output by the unidirectional DC / DC converter 502 into alternating current and adjust the voltage of the alternating current.

[0144] In this embodiment, the monitoring module 301 is also used to monitor the current state of the power grid.

[0145] When the current state of the power grid is at a low power consumption, the centralized control module 303 is also used to instruct the control module 203 to control the charging module to only receive the power output from the power grid, control the power generation device 501 to only output power to the energy storage device 503, and increase the output power of the output port, or, at the same time, instruct the energy storage device 503 to also receive the power output from the power grid;

[0146] When the current state of the power grid is at a peak power consumption, the centralized control module 303 is also used to instruct the control module 203 to control the power grid to stop outputting power to the charging module, and to control the energy storage device 503 and / or the power generation device 501 to output power to the charging module and / or the power grid; and / or,

[0147] The centralized control module 303 is also used to instruct the control module to control the power grid to stop outputting power to the charging module when the number of quick-change batteries that have completed charging reaches the fully charged battery threshold, and at the same time control the energy storage device 503, the power generation device 501 and the first number of quick-change batteries to output electric energy to the power grid respectively.

[0148] In this embodiment, by connecting the unidirectional DC / DC converter and the bidirectional DC / DC converter in the DC energy supply module, and connecting the unidirectional DC / DC converter and the bidirectional AC / DC converter, not only can the DC voltage output by the power generation device be further adjusted, but the electric energy after the voltage adjustment can also be further shared with the energy storage device for storage and backup, and the DC power output by the power generation device can also be converted into AC power and outputted back to the power grid, thereby further reducing the pressure on the power grid during peak power consumption periods.

[0149] In this embodiment, by monitoring the status of the power grid at different periods such as the low power consumption and peak power consumption, as well as the number of fully charged batteries, the direction of power output by the energy storage device and the power generation device can be controlled. This can not only automatically and reasonably distribute power to each battery, and efficiently and quickly charge batteries with high charging requirements, but also store excess power for backup, and output power to the power grid in reverse in a timely manner, helping the power grid to perform peak load shifting and valley filling.

[0150] Example 9

[0151] This embodiment provides a charging system, which is a further improvement of any one of Embodiments 1 to 8. In this embodiment, the first charging module, the second charging module and other charging modules of the charging system are all conventional charging modules, and the control module is specifically used to call the conventional charging module in the conventional charging mode and charge the quick-change battery through the battery charging port.

[0152] The charging system of this embodiment further includes at least one redundant charging module, which serves as a backup power source for charging the quick-change battery, wherein the redundant charging modules are connected in parallel with the conventional charging modules and are connected to each battery charging port through a switch.

[0153] In the normal charging mode, the control module does not need to call the redundant charging module to charge the quick-change battery. In a specific embodiment, in the normal charging mode, the control module can control the switch between the redundant charging module and the corresponding battery charging port to be disconnected so that only the conventional charging module is used to charge the quick-change battery. In the special charging mode, the control module calls the redundant charging module to charge the corresponding quick-change battery through the corresponding battery charging port to meet the charging requirements of the quick-change battery. In a specific embodiment, in the special charging mode, the control module is used to control the switch between the redundant charging module and the corresponding battery charging port to be closed so as to conduct the connection between the redundant charging module and the battery charging port to call the redundant charging module.

[0154] In normal charging mode, the conventional charging module can meet the charging needs of the quick-change battery. In special charging mode, when the quick-change battery needs to be charged at a higher charging rate or the conventional charging module originally used to charge the quick-change battery fails and the conventional charging module cannot meet the charging needs of the quick-change battery, the control module can call on the redundant battery to charge the quick-change battery.

[0155] Among them, the specific implementation method of the redundant charging module can be selected according to actual needs. In this embodiment, in order to improve the stability of the overall charging system, the redundant charging module is set to be the same as the other charging modules.

[0156] In this embodiment, by setting up and calling redundant batteries, the charging needs of quick-swap batteries can be met and the charging efficiency of quick-swap batteries can be improved, further enhancing the user's battery swap experience at battery swap stations or energy storage stations.

[0157] In a specific embodiment, the initial charging mode is a conventional charging mode, and correspondingly, the initial state of the switch between the redundant charging module and the corresponding battery charging port is a disconnected state. When entering a special charging mode, the control module is used to control the closure of the switch between the redundant charging module and the corresponding battery charging port to make the circuit conductive, so as to call the redundant charging module and charge the quick-change battery through the corresponding battery charging port.

[0158] In this embodiment, multiple redundant charging modules can be set. In a specific scenario, each redundant charging module can be further connected in parallel with a certain number of conventional charging modules. For example, in a specific case, three redundant charging modules and eight conventional charging modules are set. The first redundant charging module can be set to be connected in parallel with the first three conventional charging modules, the second redundant charging module can be set to be connected in parallel with the middle two conventional charging modules, and the third redundant charging module can be set to be connected in parallel with the last three conventional charging modules. The control module can control the switching switch on the circuit from the corresponding redundant charging module to the target battery charging port to cut off, thereby controlling the conduction or disconnection of the circuit to call or prohibit the corresponding redundant charging module from charging the corresponding quick-change battery. In the second specific scenario: all redundant charging modules can also be further set to be connected in parallel with the conventional charging modules. In this way, the control module can simultaneously control the calling of multiple redundant charging modules to charge one or more quick-change batteries. On the one hand, the charging speed of the quick-change battery can be further accelerated. On the other hand, when a redundant charging module fails, the charging process of the quick-change battery to be charged can be further ensured to be smooth. It should be understood that the above specific examples are only used as examples. In actual situations, the specific number of redundant charging modules, the specific number of conventional charging modules, and the corresponding relationship between redundant charging modules and conventional charging modules can be set according to actual needs.

[0159] Figure 7 A circuit structure diagram of the charging system in this embodiment in a specific scenario is shown, wherein the charging system includes a redundant charging module b1, and four conventional charging modules d1, d2, d3 and d4, the redundant charging module b1 is connected in parallel with the conventional charging modules d1, d2, d3 and d4, respectively, wherein the conventional charging modules d1, d2, d3 and d4 are used to provide power to the quick-change batteries BAT1, BAT2, BAT3 and BAT4 through the charging ports corresponding to the quick-change batteries BAT1, BAT2, BAT3 and BAT4 respectively in the conventional charging mode.

[0160] Switching switches KM11, KM12, KM13 and KM14 are respectively provided on the circuits from the redundant charging module to the charging ports corresponding to the quick-change batteries BAT1, BAT2, BAT3 and BAT4, wherein the switching switches can generally be set as contactors, or other types of mechanical or electronic switches for switching. This embodiment does not limit the specific implementation form of the switching switches, which can be selected according to actual conditions.

[0161] Among them, the initial states of the switching switches KM11, KM12, KM13 and KM14 are all disconnected. When a quick-change battery needs to use a redundant charging module, the switching switch on the corresponding circuit is controlled to be closed so that the redundant charging module can charge the corresponding quick-change battery. The specific control process is as follows:

[0162] In a special charging mode, when a charging module fails, such as when the conventional charging module d1 fails, the control module will control the switching switch KM11 which was originally in the disconnected state to close, and the circuit between the redundant charging module b1 and the conventional charging module d1 will be connected, so that the redundant charging module b1 can charge the quick-change battery BAT1 through the battery charging port corresponding to the quick-change battery BAT1.

[0163] In another special charging mode, the redundant charging module can charge the quick-change battery together with the conventional charging module corresponding to the quick-change battery, such as: when a quick-change battery has an accelerated charging requirement, or the conventional charging module corresponding to a quick-change battery cannot meet the charging requirements of the quick-change battery, specifically, such as: when the control module receives a boost charging instruction that the quick-change battery needs to be boosted, the control module will control the switching switch KM13 that was originally in the disconnected state to close, and the circuit between the redundant charging module b1 and the conventional charging module d3 will be turned on, so that the redundant charging module b1 can charge the quick-change battery BAT3 together with the conventional charging module d3 through the battery charging port corresponding to the quick-change battery BAT3.

[0164] In this embodiment, by setting a switching switch on the circuit from the redundant charging module to the quick-change battery, the control module can call the redundant charging module to charge the quick-change battery by controlling the closing of the switching switch. On the one hand, when the conventional charging module corresponding to the quick-change battery fails, the normal charging of the quick-change battery can be guaranteed. On the other hand, the charging efficiency of the quick-change battery can also be improved through the cooperation between the redundant charging module and the conventional charging module.

[0165] In this embodiment, switching switches QF11, QF12, QF13 and QF14 can be further set on the circuits of the charging ports corresponding to the conventional charging modules to the quick-change batteries BAT1, BAT2, BAT3 and BAT4. When there is no quick-change battery to be charged at the charging port or the corresponding quick-change battery is already fully charged, the control module can control the corresponding switching switch to disconnect to avoid the conventional charging module from outputting invalid electrical energy. For example, when the quick-change battery BAT1 is fully charged or reaches a preset charging charge value, the charging system will generate a QF11 switch disconnection instruction. When the control module receives the instruction, it will control the switching switch QF11 to disconnect.

[0166] In this embodiment, a switching switch is set on the circuit from the conventional charging module to the charging port corresponding to the quick-change battery. When there is no quick-change battery that needs to be charged at the charging port or the corresponding quick-change battery is full or reaches a preset charging charge value, the corresponding switching switch can be controlled to disconnect, thereby avoiding the output of invalid electrical energy of the charging system and further improving the energy utilization efficiency of the charging system.

[0167] It should be understood that the above specific scenario is only used as an example. In practice, the number of conventional charging modules and the number of multiple redundant charging modules can be selected according to actual needs. The conventional charging modules and quick-change batteries may not have a one-to-one correspondence. For example, multiple conventional charging modules can be matched to the same quick-change battery according to actual charging needs.

[0168] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A charging system for a battery swap station or an energy storage station, characterized in that: The charging system includes a charging module, a battery charging port, an AC power supply module, an energy storage power supply module, a monitoring module, a centralized control module and a control module. The charging module charges the quick-change battery through the battery charging port; one end of the AC power supply module is connected to the power grid, and the other end is connected to the charging module to supply energy to the charging module; The monitoring module is used to monitor the current state of the power grid; When the current state of the power grid is a low power consumption valley, the centralized control module is used to instruct the control module to control the charging module to only receive the power output by the power grid, or, at the same time, instruct the energy storage and supply module to receive the power output by the power grid; When the current state of the power grid is at a peak power consumption, the centralized control module is used to instruct the control module to control the power grid to stop outputting power to the charging module, and control the energy storage and supply module to output power to the charging module; or, The centralized control module is also used to instruct the control module to control the grid to stop outputting electricity to the charging module, and at the same time control the energy storage and supply module and the first number of quick-change batteries to output electric energy to the grid respectively when the current state of the grid is at a peak of electricity consumption and the number of the quick-change batteries that have completed charging reaches a threshold value of fully charged batteries; The AC energy supply module includes a bidirectional AC / DC converter, and the energy storage supply module includes an energy storage device and a bidirectional DC / DC converter; The AC end of the bidirectional AC / DC converter is connected to the power grid, the DC end of the bidirectional AC / DC converter is respectively connected to the charging module and one end of the bidirectional DC / DC converter, one end of the bidirectional DC / DC converter is also connected to the charging module, and the other end of the bidirectional DC / DC converter is connected to the energy storage device; The bidirectional AC / DC converter is used to convert the alternating current output by the power grid into direct current, and adjust the voltage of the direct current; or, the bidirectional AC / DC converter is used to convert the direct current output by the charging module and / or the direct current output by the bidirectional DC / DC converter into alternating current, and adjust the voltage of the alternating current; The bidirectional DC / DC converter is used to adjust the voltage of the direct current output by the energy storage device; or, the bidirectional DC / DC converter is used to adjust the voltage of the direct current output by the bidirectional AC / DC converter; The charging system also includes a DC power supply module; the DC power supply module includes a power generation device and a unidirectional DC / DC converter, the input end of the unidirectional DC / DC converter is connected to the power generation device, and the output end of the unidirectional DC / DC converter is respectively connected to the charging module, one end of the bidirectional DC / DC converter and the DC end of the bidirectional AC / DC converter; The unidirectional DC / DC converter is used to adjust the voltage of the direct current output by the power generation device; The bidirectional DC / DC converter is also used to adjust the voltage of the direct current output by the unidirectional DC / DC converter; The bidirectional AC / DC converter is also used to convert the direct current output by the unidirectional DC / DC converter into alternating current and adjust the voltage of the alternating current.

2. The charging system according to claim 1, characterized in that: When the current state of the power grid is a low power consumption valley, the centralized control module is further used to instruct the control module to control the power generation device to only output power to the energy storage device, or, at the same time, instruct the energy storage device to also receive power output from the power grid; When the current state of the power grid is at a peak power consumption, the centralized control module is further used to instruct the control module to control the energy storage device and / or the power generation device to output power to the charging module and / or the power grid; and / or, The centralized control module is also used to instruct the control module to control the power grid to stop outputting power to the charging module when the number of the quick-change batteries that have completed charging reaches a fully charged battery threshold, and at the same time control the energy storage device, the power generation device and the first number of quick-change batteries to output electric energy to the power grid respectively.

3. The charging system according to claim 2, characterized in that: The output end of the unidirectional DC / DC converter is also connected to the energy storage device, and one end of the bidirectional DC / DC converter is also connected to the power generation device.

4. The charging system according to claim 1, characterized in that: The control module is also used to disconnect the electrical connection between the charging module and the battery charging port after the quick-change battery is charged, and instruct the called charging module to stop output.

5. The charging system according to claim 1, characterized in that: The charging system also includes a computing module; The calculation module is used to obtain the charging requirements of each quick-change battery in the battery swap station or energy storage station based on the current battery parameters.

6. The charging system according to claim 5, characterized in that: The monitoring module is used to monitor the current battery parameters of each of the quick-change batteries in the battery swap station or energy storage station; The centralized control module is used to instruct the control module to charge the battery charging port corresponding to each quick-change battery and adjust the output power of each charging module called according to the charging requirements of each quick-change battery, so that each battery charging port outputs an output power suitable for charging each quick-change battery.

7. The charging system according to claim 5, characterized in that: The control module is used to call different numbers of the charging modules and control the output power of each charging module according to the charging requirements of the quick-change battery, and charge the quick-change battery through the battery charging port to meet the charging requirements.

8. The charging system according to claim 7, characterized in that: Each of the charging modules has a first output interface, and the first output interfaces of the charging modules are connected in parallel via a shunt or a contactor. The control module controls the shunt or the contactor to call different numbers of the charging modules.

9. The charging system according to any one of claims 1 to 8, characterized in that: The charging system comprises at least two charging modules, and the at least two charging modules are connected in parallel; The control module is used to call different numbers of the charging modules and / or control the output power of each charging module, and charge the quick-change battery through the battery charging port.

10. The charging system according to claim 9, characterized in that: The at least two charging modules are conventional charging modules; the charging system also includes at least one redundant charging module, wherein the redundant charging modules are respectively connected in parallel with the conventional charging modules and are respectively connected to each of the battery charging ports through switches.

11. The charging system according to claim 10, characterized in that: The control module is used to call the conventional charging module in the conventional charging mode and charge the quick-change battery through the battery charging port; The control module is also used to call the redundant charging module in a special charging mode and charge the quick-change battery through the battery charging port.

12. The charging system according to claim 11, characterized in that: The special charging mode includes a failure of one of the conventional charging modules, and the control module is used to close one of the switches to call the redundant charging module to charge the quick-change battery corresponding to the failed conventional charging module through the battery charging port; and / or, The special charging mode includes the control module receiving a boost charging instruction, and the control module is used to call the redundant charging module and at least one of the conventional charging modules to charge the quick-change battery that needs boost charging through the battery charging port.

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