Energy storage and charge device, electrical device charge system, and electric energy control method

Abstract

An energy storage and charge device, an electrical device charge system, and an electric energy control method. The energy storage and charge device comprises: an energy storage assembly (10), a charge assembly (11), and a connection assembly (12), the connection assembly (12) being connected to the energy storage assembly (10) by means of the charge assembly (11). When the connection assembly (12) is connected to a target electrical device, the charge assembly (11) may use electric energy stored in a first energy storage unit (100) of the energy storage assembly (10) to charge the target electrical device according to a target charge mode by means of the connection assembly (12).The ratio of the rated energy of the first energy storage unit (100) to the maximum charge and discharge power of the first energy storage unit (100) is greater than or equal to a first preset ratio threshold, the first preset ratio threshold being a positive number greater than 1. Thus, there is no need to add transformers or expand the capacity of transformers, thereby helping to reduce the cost of adding energy storage and charge devices.

Description

Energy storage and charging equipment, charging systems for electrical equipment, and power control methods Cross-referencing

[0001] This application incorporates Chinese Patent Application No. 2024109331592, filed on July 12, 2024, entitled “Storage and Charging Equipment, Charging System for Electrical Equipment and Power Control Method”, which is incorporated herein by reference in its entirety. Technical Field

[0002] This application relates to the field of charging and discharging technology, and in particular to a storage and charging device, a charging system for electrical equipment, and a power control method. Background Technology

[0003] With the increasing use of electric vehicles, the current number of charging stations is no longer sufficient to meet the charging needs of these vehicles, necessitating the addition of more and more charging stations.

[0004] In related technologies, charging piles are typically connected to the power grid via transformers. However, as more and more charging piles are connected to the power grid, it is necessary to add more transformers or expand the capacity of existing transformers, resulting in high costs associated with adding charging piles. Summary of the Invention

[0005] In view of the above problems, this application provides a storage and charging device, a charging system for electrical equipment, and a power control method, which can solve the problem of high cost of adding charging piles in related technologies.

[0006] In a first aspect, embodiments of this application provide a storage and charging device, which includes: an energy storage component, a charging component, and a connection component, wherein the connection component is connected to the energy storage component through the charging component;

[0007] The charging component can charge the target electrical device according to the target charging mode by using the electrical energy stored in the first energy storage unit in the energy storage component when the connection component is connected to the target electrical device; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0008] In this embodiment, the charging component in the energy storage device can charge the target electrical equipment by utilizing the electrical energy stored in the first energy storage unit, without directly using the grid's power. This alleviates the demand on the grid and reduces the pressure on the transformer connected to the grid. Therefore, this embodiment eliminates the need to add or expand the transformer, thus saving on the cost of adding the energy storage device. Furthermore, by ensuring that the ratio between the rated energy of the first energy storage unit and its maximum charge / discharge power is greater than or equal to a first preset threshold (i.e., the rated energy of the first energy storage unit is greater than its maximum charge / discharge power), the charge / discharge rate of the first energy storage unit can be reduced. This eliminates the need for a corresponding thermal management system for the first energy storage unit, further saving on the cost of adding the energy storage device. On the other hand, it also increases the charge / discharge power of the first energy storage unit, ensuring it meets the charging needs of the electrical equipment.

[0009] In some embodiments, the maximum charging and discharging power of the first energy storage unit is greater than or equal to the maximum preset charging and discharging power corresponding to the target charging mode, which is beneficial to ensure that the charging and discharging power of the first energy storage unit can meet the charging needs of the target electrical equipment according to the target charging mode.

[0010] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can charge the target electrical device through the connection component at a first discharge rate not greater than a first preset discharge rate threshold; the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode.

[0011] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can charge the target electrical device through the connection component at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate.

[0012] In some embodiments, the first energy storage unit can store electrical energy when the load on the power grid is less than a preset load threshold.

[0013] In this embodiment, the method of storing electrical energy by the first energy storage unit when the grid load is less than a preset load threshold not only does not affect the power grid supply to the basic load equipment through the transformer, but also makes full and reasonable use of the electrical energy surplus within the existing transformer capacity. This allows the charging component to charge the target electrical equipment using the electrical energy stored in the first energy storage unit when the connection component is connected to the target electrical equipment, without having to directly use the grid's electrical energy to charge the target electrical equipment. This can alleviate the pressure on the transformer connected to the grid. Therefore, this embodiment does not require the addition of a transformer or the expansion of the transformer capacity, which helps to save the cost of adding the energy storage and charging equipment.

[0014] In some embodiments, the first energy storage unit includes multiple battery packs, wherein the battery performance parameters of different battery packs are different;

[0015] The first energy storage unit can store electrical energy in a target battery pack among multiple batteries based on the balance of battery performance parameters when the grid load is less than a preset load threshold.

[0016] Specifically, when the connecting component is connected to the target electrical device, the charging component can utilize the electrical energy stored in the target battery pack to charge the target electrical device according to the target charging mode.

[0017] In this embodiment of the application, by storing electrical energy in a target battery pack among multiple batteries based on the balance of battery performance parameters, and using the electrical energy stored in the target battery pack to charge the target electrical equipment, it is possible to save the cost of adding storage and charging equipment, and also to improve the service life of the first energy storage unit.

[0018] In some embodiments, the energy storage component further includes a second energy storage unit, wherein the charge / discharge rate of the second energy storage unit is greater than the charge / discharge rate of the first energy storage unit;

[0019] The second energy storage unit can store electrical energy when the grid load is less than a preset load threshold;

[0020] The charging component can also charge the target electrical device according to the target charging mode by using the electrical energy stored in the first energy storage unit and / or the second energy storage unit when the connection component is connected to the target electrical device; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than a first preset ratio threshold.

[0021] In this embodiment, by using the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device when the connection component is connected to the target electrical device, the flexibility of charging the target electrical device can be improved, thereby improving the power supply stability of the energy storage and charging device.

[0022] In some embodiments, the charging component may specifically utilize the electrical energy stored in the first energy storage unit to charge the target electrical device according to the target charging mode through the connection component, and when the remaining electrical energy in the first energy storage unit is less than a first preset electrical energy threshold, it may utilize the electrical energy stored in the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component.

[0023] In some embodiments, the charging component may specifically utilize the electrical energy stored in the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component, and when the remaining electrical energy in the second energy storage unit is less than the second preset electrical energy threshold, it may utilize the electrical energy stored in the first energy storage unit to charge the target electrical device according to the target charging mode through the connection component.

[0024] In some embodiments, the energy storage component is connected to a DC bus;

[0025] The energy storage component can store electrical energy supplied by the DC bus when the grid load is less than a preset load threshold, and output electrical energy to the DC bus when preset discharge conditions are met.

[0026] In this embodiment, the energy storage component is connected to the DC bus, which can store electrical energy provided by the DC bus when the load of the power grid is less than a preset load threshold, and output electrical energy to the DC bus when the preset discharge conditions are met. This not only improves the convenience of storing and releasing electrical energy, but also improves the convenience of power transmission to other devices or components on the DC bus.

[0027] In some embodiments, the charging component is connected to a DC bus;

[0028] The charging component can also charge the target electrical equipment according to the target charging mode by using the power provided by the DC bus when the connection component is connected to the target electrical equipment.

[0029] In this embodiment, the charging component is connected to the DC bus. When the connecting component is connected to the target electrical device, it can also use the power provided by the DC bus to charge the target electrical device according to the target charging mode. This allows the charging component to obtain sufficient power from the DC bus to charge the target electrical device, thereby improving the charging efficiency of the target electrical device.

[0030] In some embodiments, the connection component is also connected to a DC bus;

[0031] The connection component can also transmit electrical energy from the target electrical equipment to the DC bus, enabling VtoG or VtoESS functions, which helps improve the power supply flexibility of the power grid system.

[0032] In some embodiments, the energy storage and charging device further includes a control component connected to the energy storage component and the charging component;

[0033] The control component can control the charging component to use the electrical energy stored in the energy storage component to charge the target electrical equipment according to the target charging mode through the connection component.

[0034] In this embodiment, the charging component can be controlled by the control component to utilize the electrical energy stored in the energy storage component, and the target electrical device can be charged by the connection component according to the target charging mode. This allows the energy storage component and / or charging component in the energy storage and charging device to work together better, thereby improving the charging efficiency of the energy storage and charging device for the target electrical device.

[0035] Secondly, embodiments of this application provide a charging system for electrical equipment, which includes a plurality of storage and charging devices as described in any of the first aspects above;

[0036] The charging component in any energy storage and charging device can, when a first target electrical device is connected to the connection component in the energy storage and charging device, use the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the first target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0037] In this embodiment, the charging component in any energy storage device can charge the first target electrical device by utilizing the electrical energy stored in the first energy storage unit, without directly using the grid's power. This alleviates the demand on the grid and reduces the pressure on the transformer connected to the grid. Therefore, this embodiment eliminates the need to add or expand the transformer, thus saving on the cost of adding the energy storage device. Furthermore, by ensuring that the ratio between the rated energy of the first energy storage unit and its maximum charge / discharge power is greater than or equal to a first preset threshold (i.e., the rated energy of the first energy storage unit is greater than its maximum charge / discharge power), the charge / discharge rate of the first energy storage unit can be reduced. This eliminates the need for a corresponding thermal management system in the energy storage device, further saving on the cost of adding the device. On the other hand, it increases the charge / discharge power of the first energy storage unit, ensuring it meets the charging needs of the electrical device.

[0038] In some embodiments, the maximum charge / discharge power of the first energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode.

[0039] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can charge the first target electrical device through the connection component at a first discharge rate not greater than the first preset discharge rate threshold; the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode.

[0040] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can charge the first target electrical device through the connection component at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate.

[0041] In some embodiments, the first energy storage unit in each energy storage and charging device can store electrical energy when the load on the power grid is less than a preset load threshold.

[0042] In some embodiments, the first energy storage unit includes multiple battery packs, wherein the battery performance parameters of different battery packs are different; specifically, the first energy storage unit can store electrical energy in a target battery pack based on the balance of battery performance parameters when the load on the power grid is less than a preset load threshold; wherein the target battery pack is one of the multiple battery packs in the first energy storage unit.

[0043] In some embodiments, the charging component in the storage and charging device can specifically charge the first target electrical device according to the target charging mode by using the electrical energy stored in the target battery pack through the connection component when the connection component in the storage and charging device is connected to the first target electrical device.

[0044] In some embodiments, the energy storage component in the energy storage and charging device further includes a second energy storage unit that can store electrical energy when the load on the power grid is less than a preset load threshold, wherein the charge-discharge rate of the second energy storage unit is greater than the charge-discharge rate of the first energy storage unit.

[0045] Specifically, when the charging component in the energy storage and charging device is connected to the first target electrical device via the connection component in the energy storage and charging device, it can use the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage and charging device to charge the first target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than a first preset ratio threshold.

[0046] In some embodiments, the electrical equipment charging system further includes: a first supplementary energy storage unit connected to at least one energy storage device;

[0047] The first supplementary energy storage unit can store electrical energy when the grid load is less than a preset load threshold, and provide electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the first supplementary energy storage unit is greater than or equal to a first preset supplementary ratio threshold; the first preset supplementary ratio threshold is a positive number greater than 1.

[0048] In some embodiments, the rated energy of the first supplementary energy storage unit is related to the total input power and total rated energy of each energy storage device.

[0049] In some embodiments, the maximum charge / discharge power of the first supplementary energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode.

[0050] In some embodiments, the first supplementary energy storage unit includes a plurality of supplementary battery packs, wherein the battery performance parameters of different supplementary battery packs are different;

[0051] The first supplementary energy storage unit can store electrical energy in a target supplementary battery pack among multiple supplementary battery packs based on the balance of battery performance parameters when the grid load is less than a preset load threshold, and can use the electrical energy stored in the target supplementary battery pack to provide power to at least one energy storage and charging device when the grid load is not less than the preset load threshold.

[0052] In this embodiment, by storing electrical energy in a target supplementary battery pack among multiple supplementary batteries based on the balance of battery performance parameters, and using the electrical energy stored in the target supplementary battery pack to provide power to the energy storage and charging device, the cost of the charging system for the electrical equipment can be saved. This not only helps to improve the power supply stability of the energy storage and charging device, but also helps to extend the service life of the first supplementary energy storage unit.

[0053] In some embodiments, the electrical equipment charging system further includes: a second supplementary energy storage unit connected to at least one energy storage device;

[0054] The second supplementary energy storage unit can store electrical energy when the grid load is less than a preset load threshold, and provide electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold and the remaining electrical energy of the first supplementary energy storage unit is less than a preset energy threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the second supplementary energy storage unit is less than or equal to a second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0055] In this embodiment of the application, the method of providing power to at least one energy storage device through a second supplementary energy storage unit and / or a first supplementary energy storage unit can improve the flexibility of providing power to the energy storage device, thereby helping to further improve the power supply stability of the energy storage device.

[0056] In some embodiments, the electrical equipment charging system further includes: a power generation unit connected to at least one energy storage device;

[0057] The power generation unit can provide power to at least one energy storage and charging device when the load on the power grid is not less than a preset load threshold.

[0058] In this embodiment of the application, the charging system for electrical equipment may further include: a power generation unit connected to at least one energy storage device; by providing power to at least one energy storage device through the power generation unit when the load of the power grid is not less than a preset load threshold, the flexibility of providing power to the energy storage device can be further improved, thereby helping to further improve the power supply stability of the energy storage device.

[0059] In some embodiments, the electrical equipment charging system further includes: a plurality of AC charging devices;

[0060] An AC charging device can charge a second target electrical device connected to it using electrical energy provided by the power grid when the power grid load is less than a preset load threshold.

[0061] In this embodiment, when an AC charging device is connected to a second target electrical device and the grid load is less than a preset load threshold, the method of charging the second target electrical device connected to the AC charging device using the power provided by the grid has two advantages. First, it does not affect the grid's supply of power to the basic load device through the transformer, eliminating the need to add a transformer or expand its capacity, thus saving on the cost of adding the energy storage device. Second, it can fully and rationally utilize the existing transformer capacity's energy reserve, thereby improving the transformer's energy utilization rate.

[0062] In some embodiments, the AC charging device can also charge a second target electrical device connected to the AC charging device using electrical energy provided by at least one energy storage device or a first supplementary energy storage unit, provided that the load on the power grid is not less than a preset load threshold.

[0063] In this embodiment, when the load on the power grid is not less than a preset load threshold, the AC charging device uses the electrical energy provided by at least one energy storage device or a first supplementary energy storage unit to charge the second target electrical device connected to the AC charging device. This eliminates the need to directly use the power grid's electrical energy to charge the second target electrical device, thus alleviating the power demand on the power grid and relieving the pressure on the transformer connected to the power grid. Therefore, this embodiment does not require the addition of a transformer or the expansion of the transformer's capacity, which helps to save on the cost of adding the energy storage device.

[0064] In some embodiments, each energy storage device is connected to a DC bus.

[0065] In some embodiments, the electrical equipment charging system further includes: a monitoring device connected to each storage and charging device;

[0066] The monitoring equipment can control the charging components in any energy storage device. When a first target electrical device is connected to the connection component in the energy storage device, the equipment can use the electrical energy stored in the energy storage component to charge the first target electrical device according to the target charging mode through the connection component.

[0067] Thirdly, embodiments of this application provide a power control method for a power storage and charging device, wherein the power storage and charging device is any of the power storage and charging devices described in the first aspect above, and the method includes:

[0068] When the charging component in the energy storage and charging device is connected to the target electrical device via the connection component, it uses the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the target electrical device according to the target charging mode via the connection component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0069] In some embodiments, the method further includes:

[0070] The first energy storage unit stores electrical energy when the grid load is less than a preset load threshold.

[0071] In some embodiments, the first energy storage unit stores electrical energy when the grid load is less than a preset load threshold, including:

[0072] When the grid load is less than a preset load threshold, the first energy storage unit stores electrical energy in the target battery pack based on the balance of battery performance parameters; wherein, the target battery pack is one of the multiple battery packs in the first energy storage unit.

[0073] In some embodiments, when a target electrical device is connected to a connection component in the energy storage and charging device, the charging component utilizes the electrical energy stored in the first energy storage unit of the energy storage and charging device to charge the target electrical device according to a target charging mode via the connection component, including:

[0074] When the connection component is connected to the target electrical device, the charging component uses the electrical energy stored in the target battery pack to charge the target electrical device according to the target charging mode through the connection component.

[0075] In some embodiments, the method further includes:

[0076] The second energy storage unit in the energy storage and charging equipment stores electrical energy when the grid load is less than a preset load threshold;

[0077] When the connection component is connected to the target electrical device, the charging component uses the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than a first preset ratio threshold.

[0078] In some embodiments, when the connection component is connected to a target electrical device, the charging component utilizes the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to a target charging mode via the connection component, including:

[0079] The charging component uses the electrical energy stored in the first energy storage unit to charge the target electrical device according to the target charging mode through the connection component. When the remaining electrical energy in the first energy storage unit is less than the first preset electrical energy threshold, the component uses the electrical energy stored in the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component.

[0080] In some embodiments, when the connection component is connected to a target electrical device, the charging component utilizes the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to a target charging mode via the connection component, including:

[0081] The charging component uses the electrical energy stored in the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component. When the remaining electrical energy in the second energy storage unit is less than the second preset electrical energy threshold, the component uses the electrical energy stored in the first energy storage unit to charge the target electrical device according to the target charging mode through the connection component.

[0082] Fourthly, embodiments of this application provide a power control method for a charging system for electrical equipment, wherein the charging system for electrical equipment is any one of the charging systems described in the second aspect above, and the method includes:

[0083] When it is detected that a first target electrical device is connected to the connection component in any energy storage and charging device, the charging component in the energy storage and charging device is controlled to use the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the first target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0084] In some embodiments, the method further includes:

[0085] When the load on the power grid is detected to be less than a preset load threshold, the first energy storage unit of each energy storage and charging device is controlled to store electrical energy.

[0086] In some embodiments, the method further includes:

[0087] The charging component in the energy storage and charging device uses the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to charge the first target electrical device according to the target charging mode through the connection component.

[0088] In some embodiments, the method further includes:

[0089] The first supplementary energy storage unit in the control equipment charging system stores electrical energy when the grid load is less than a preset load threshold, and provides electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the first supplementary energy storage unit is greater than or equal to a first preset supplementary ratio threshold; the first preset supplementary ratio threshold is a positive number greater than 1.

[0090] In some embodiments, controlling a first supplementary energy storage unit in a power device charging system to store electrical energy when the grid load is less than a preset load threshold, and to provide electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold, includes:

[0091] The first supplementary energy storage unit stores electrical energy in the target supplementary battery pack based on the balance of battery performance parameters when the grid load is less than a preset load threshold, and uses the electrical energy stored in the target supplementary battery pack to provide power to at least one energy storage and charging device when the grid load is not less than the preset load threshold; wherein, the target supplementary battery pack is a battery pack among multiple supplementary battery packs in the first supplementary energy storage unit.

[0092] In some embodiments, the method further includes:

[0093] The second supplementary energy storage unit in the control equipment charging system stores electrical energy when the grid load is less than a preset load threshold, and provides electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold and the remaining electrical energy of the first supplementary energy storage unit is less than a preset energy threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the second supplementary energy storage unit is less than or equal to a second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0094] In some embodiments, the method further includes:

[0095] The power generation unit in the control equipment charging system provides power to at least one energy storage device when the grid load is not less than a preset load threshold.

[0096] In some embodiments, the method further includes:

[0097] When it is detected that any AC charging device in the electrical equipment charging system is connected to a second target electrical device, and the load of the power grid is less than a preset load threshold, the AC charging device is controlled to use the power provided by the power grid to charge the second target electrical device connected to the AC charging device.

[0098] In some embodiments, the method further includes:

[0099] When the load on the power grid is not less than a preset load threshold, the AC charging device is controlled to use the electrical energy provided by at least one energy storage device or a first supplementary energy storage unit to charge the second target electrical device connected to the AC charging device.

[0100] Fifthly, embodiments of this application provide an energy control method, which is applied to an energy storage component in an energy storage and charging device as described in any of the first aspects above. The method includes:

[0101] The energy storage component sends its electrical energy storage information to the control component of the energy storage and charging equipment;

[0102] In response to the opening of the discharge path, the energy storage component uses the electrical energy stored in the first energy storage unit in the energy storage component to output target electrical energy to the charging component of the charging device. The target electrical energy is used by the charging component to charge the target electrical device through the connection component of the charging device according to the target charging mode.

[0103] Wherein, the ratio between the rated energy of the first energy storage unit and the maximum charge / discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0104] In some embodiments, the maximum charge / discharge power of the first energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode.

[0105] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can output target electrical energy to the charging component of the energy storage device at a first discharge rate not greater than a first preset discharge rate threshold; the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode.

[0106] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can output target electrical energy to the charging component of the energy storage device at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate.

[0107] In some embodiments, the energy storage component further includes a second energy storage unit, wherein the charge / discharge rate of the second energy storage unit is greater than the charge / discharge rate of the first energy storage unit;

[0108] In response to the opening of the discharge path, the energy storage component can also use the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to output target electrical energy to the charging component of the charging device; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than a first preset ratio threshold.

[0109] In some embodiments, the second energy storage unit satisfies one or more of the following conditions:

[0110] The ratio between the rated energy of the second energy storage unit and the maximum discharge power of the second energy storage unit shall not exceed 1:3;

[0111] The energy density of the second energy storage unit is greater than or equal to 380 Wh / L;

[0112] The ratio between the rated energy of the second energy storage unit and the maximum charging power of the charging component is less than 1:4.

[0113] In some embodiments, any energy storage unit in the energy storage assembly includes multiple battery packs, and the rated energy of the energy storage unit includes the sum of the rated energies of the multiple battery packs.

[0114] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0115] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0116] Figure 1 is a schematic diagram of the structure of a storage and charging device provided in some embodiments of this application;

[0117] Figure 2 is a schematic diagram of the structure of a storage and charging device provided in some other embodiments of this application;

[0118] Figure 3 is a structural schematic diagram of a storage and charging device provided in some other embodiments of this application;

[0119] Figure 4 is a structural schematic diagram of a storage and charging device provided in some other embodiments of this application;

[0120] Figure 5 is a schematic diagram of the structure of a charging system for electrical equipment provided in some embodiments of this application;

[0121] Figure 6 is a schematic diagram of the structure of a charging system for electrical equipment provided in some other embodiments of this application;

[0122] Figure 7 is a schematic diagram of the structure of a charging system for electrical equipment provided in some other embodiments of this application;

[0123] Figure 8 is a schematic diagram of the structure of a charging system for electrical equipment provided in some other embodiments of this application;

[0124] Figure 9 is a schematic diagram of the structure of a charging system for electrical equipment provided in some other embodiments of this application;

[0125] Figure 10 is a schematic diagram of the structure of a charging system for electrical equipment provided in some other embodiments of this application;

[0126] Figure 11 is a schematic diagram of the cloud architecture provided in an embodiment of this application;

[0127] Figure 12 is a schematic diagram of the structure of a charging system for electrical equipment provided in some other embodiments of this application;

[0128] Figure 13 is a flowchart illustrating the full-scenario charging control method for an electrical equipment charging system provided in some embodiments of this application;

[0129] Figure 14 is a flowchart illustrating the power control method provided in some embodiments of this application. Detailed Implementation

[0130] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0131] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the term "comprising" and any variations thereof in the specification, claims and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0132] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more (including two), unless otherwise explicitly defined.

[0133] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0134] The energy storage and charging device, the charging system for electrical equipment, and the power control method provided in this application embodiment can be applied to charging and discharging application scenarios for electrical equipment; of course, they can also be applied to other scenarios.

[0135] It should be noted that, for ease of explanation, the following embodiments use a vehicle as an example of the electrical equipment in this application. It should be understood that when the electrical equipment in this application is other equipment, the implementation principle and technical effect are similar.

[0136] To address the issue of high installation costs for charging piles in related technologies, this application proposes a charging component in a storage and charging device that can charge target electrical equipment using the electrical energy stored in the first energy storage unit of the energy storage component. This eliminates the need to directly utilize the power grid's electrical energy for charging the target electrical equipment, thereby alleviating the power demand on the grid and reducing the pressure on the transformer connected to the grid. Therefore, the embodiments of this application do not require the addition of a transformer or the expansion of the transformer's capacity, thus saving on the installation costs of the storage and charging device.

[0137] In some embodiments, FIG1 is a schematic diagram of the structure of a storage and charging device provided in some embodiments of this application. As shown in FIG1, the storage and charging device of this application embodiment may include, but is not limited to, an energy storage component 10, a charging component 11, and a connection component 12. The energy storage component 10 may store electrical energy, and the connection component 12 may be connected to the target electrical device to be charged.

[0138] It should be noted that the connection between the connection component 12 and the target electrical device may include, but is not limited to, a wired connection and / or a wireless connection. For example, the connection component 12 may include, but is not limited to, a charging gun or a wireless charging connector.

[0139] In this embodiment, the connection component 12 can be connected to the energy storage component 10 via the charging component 11. For example, the charging component 11 and the energy storage component 10 can be directly connected, or they can be indirectly connected. For instance, by connecting the charging component 11 to a DC bus and the energy storage component 10 to a DC bus, the charging component 11 and the energy storage component 10 can be indirectly connected via the DC bus.

[0140] In this embodiment of the application, the charging component 11 can charge the target electrical device according to the target charging mode by using the electrical energy stored in the first energy storage unit 100 in the energy storage component 10 when the connection component 12 is connected to the target electrical device.

[0141] In this embodiment of the application, the ratio between the rated energy of the first energy storage unit 100 in the energy storage component 10 and the maximum charge / discharge power of the first energy storage unit 100 is greater than or equal to a first preset ratio threshold, wherein the first preset ratio threshold can be a positive number greater than 1. For example, the ratio between the rated energy of the first energy storage unit 100 and the maximum charge / discharge power of the first energy storage unit 100 is greater than or equal to (i.e., not less than) 1:0.5.

[0142] For ease of understanding, the charge / discharge rate of the battery is briefly described in the embodiments of this application.

[0143] The charge / discharge rate of a battery refers to the current required for the battery to charge or discharge its rated capacity (or rated energy) within a specified time. Specifically, the charge / discharge rate is equal to the ratio of the charge / discharge current to the battery's rated capacity.

[0144] Therefore, given a constant charging and discharging current, the larger the rated capacity (or rated energy) of the battery, the smaller the charge and discharge rate of the battery.

[0145] In this embodiment, by ensuring that the ratio between the rated energy of the first energy storage unit 100 and its maximum charge / discharge power is greater than or equal to a first preset ratio threshold (i.e., the rated energy of the first energy storage unit 100 is greater than its maximum charge / discharge power), the following advantages are achieved: First, the charge / discharge rate of the first energy storage unit 100 is reduced, eliminating the need for a corresponding thermal management system in the energy storage device, allowing for natural cooling and thus saving costs. Second, the charge / discharge power of the first energy storage unit 100 is increased, ensuring it meets the charging needs of the electrical equipment.

[0146] In one possible implementation, when the charging component 11 is directly connected to the energy storage component 10, the charging component 11 can directly utilize the electrical energy stored in the first energy storage unit 100 in the energy storage component 10 to charge the target electrical device through the connection component 12 according to the target charging mode, provided that the connection component 12 is connected to the target electrical device.

[0147] In another possible implementation, where the charging component 11 and the energy storage component 10 can be indirectly connected via a DC bus, the charging component 11 can indirectly utilize the electrical energy stored in the first energy storage unit 100 in the energy storage component 10 to charge the target electrical device via the connection component 12, according to the target charging mode, when the target electrical device is connected to the connection component 12. The first energy storage unit 100 can output electrical energy to the DC bus.

[0148] It should be understood that if other energy storage devices, or other components or units for storing electrical energy are connected to the DC bus, the charging component 11 can also use the electrical energy stored in the other energy storage devices, other components or other units to charge the target electrical equipment through the connection component 12 according to the target charging mode.

[0149] For example, the target charging mode in this application embodiment may refer to a DC charging mode. The target charging mode may include, but is not limited to, a first charging mode or a second charging mode. The charge / discharge rate of the first charging mode may be greater than that of the second charging mode, and the charging speed of the first charging mode may be greater than that of the second charging mode. For example, the first charging mode may be called a supercharging mode, and the second charging mode may be called a fast charging mode.

[0150] As can be seen, the energy storage and charging device in this embodiment of the application is equipped with an energy storage component that can store electrical energy, and the charging component can charge the target electrical device according to the target charging mode by using the electrical energy stored in the first energy storage unit in the energy storage component when the connecting component is connected to the target electrical device. This way, the target electrical device can be charged by using the electrical energy stored in the first energy storage unit in the energy storage component, without directly using the power grid to charge the target electrical device. This can alleviate the power demand on the power grid, thereby relieving the pressure on the transformer connected to the power grid. Therefore, this embodiment of the application does not require the addition of a transformer or the expansion of the transformer, which helps to save the cost of adding the energy storage and charging device.

[0151] In summary, in this embodiment, the energy storage and charging device may include: an energy storage component, a charging component, and a connection component. The connection component is connected to the energy storage component via the charging component. The charging component, when the connection component is connected to a target electrical device, utilizes the electrical energy stored in the first energy storage unit of the energy storage component to charge the target electrical device according to the target charging mode via the connection component. Therefore, the charging component in this embodiment can charge the target electrical device using the electrical energy stored in the first energy storage unit of the energy storage component, without directly using the grid's electrical energy. This alleviates the demand on the grid and reduces the pressure on the transformer connected to the grid. Thus, this embodiment eliminates the need to add a transformer or expand its capacity, thereby saving on the cost of adding the energy storage and charging device. Furthermore, by ensuring that the ratio between the rated energy of the first energy storage unit and its maximum charge / discharge power is greater than or equal to a first preset ratio threshold (i.e., the rated energy of the first energy storage unit is greater than its maximum charge / discharge power), the following advantages are achieved: First, the charge / discharge rate of the first energy storage unit can be reduced, eliminating the need for a corresponding thermal management system in the energy storage and charging equipment, thus further saving on the cost of adding the equipment. Second, the charge / discharge power of the first energy storage unit can be increased, ensuring that it meets the charging needs of the electrical equipment.

[0152] In some embodiments, the maximum charging and discharging power of the first energy storage unit 100 in this application embodiment can be greater than or equal to the maximum preset charging and discharging power corresponding to the target charging mode, which is beneficial to ensure that the charging and discharging power of the first energy storage unit 100 can meet the charging needs of the target electrical equipment according to the target charging mode.

[0153] For example, when the target charging mode is the first charging mode, the maximum preset charging and discharging power can be greater than or equal to 360kW. As another example, when the target charging mode is the second charging mode, the maximum preset charging and discharging power can be greater than or equal to 50kW.

[0154] In some embodiments, when the target charging mode is a first charging mode, the first energy storage unit 100 can charge the target electrical device through the connection component 12 at a first discharge rate not greater than a first preset discharge rate threshold, wherein the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode. For example, the first preset discharge rate threshold can be greater than or equal to 4C. For instance, the first discharge rate can include, but is not limited to, 4C.

[0155] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit 100 can charge the target electrical device through the connection component 12 at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold can be greater than the second preset discharge rate threshold, and the first discharge rate can be greater than the second discharge rate.

[0156] For example, the second preset discharge rate threshold can be greater than or equal to 1C and less than 4C. For instance, the second discharge rate can include, but is not limited to, 2C or 3C.

[0157] As can be seen, the first energy storage unit 100 in this embodiment can charge the target electrical equipment according to different discharge rates based on different target charging modes, which can improve charging flexibility and is beneficial for adapting to electrical equipment of different specifications.

[0158] In some embodiments, the first energy storage unit 100 of this application embodiment can store electrical energy when the grid load is less than a preset load threshold, so that the charging component 11 can use the electrical energy stored in the first energy storage unit 100 to charge the target electrical device when the connection component 12 is connected to the target electrical device. The preset load threshold refers to the load boundary value corresponding to whether the grid load is light or heavy. For example, if the grid load is less than the preset load threshold, it can be determined that the grid load is light (or that the transformer connected to the grid has a surplus of electrical energy); if the grid load is not less than the preset load threshold, it can be determined that the grid load is heavy (or that the transformer connected to the grid has insufficient electrical energy).

[0159] For example, the first energy storage unit 100 can determine that the load on the power grid is less than a preset load threshold when the detected power of the transformer connected to the power grid is less than the product of the transformer's rated power and a preset coefficient, thereby storing electrical energy. The preset coefficient can be a coefficient less than 0 to 1, for example, 0.7.

[0160] Of course, other methods can also be used to determine whether the load on the power grid is less than the preset load threshold.

[0161] It should be understood that the way the first energy storage unit 100 stores electrical energy when the grid load is less than a preset load threshold will not affect the grid's supply of power to the basic load equipment through transformers, and can also make full and reasonable use of the electrical energy surplus within the existing transformer capacity. The basic load equipment may include, but is not limited to, residential load equipment and / or industrial and commercial load equipment.

[0162] Furthermore, considering the need to save on electricity costs, the first energy storage unit 100 can store electricity when the grid load is less than a preset load threshold and the current period is a low-price period for grid electricity, so as to save on the cost of electricity storage.

[0163] As can be seen, in this embodiment, the method of storing electrical energy by the first energy storage unit 100 when the load of the power grid is less than the preset load threshold not only does not affect the power grid supplying power to the basic load equipment through the transformer, but also makes full and reasonable use of the electrical energy surplus within the capacity of the existing transformer. This allows the charging component 11 to charge the target electrical equipment using the electrical energy stored in the first energy storage unit 100 when the target electrical equipment is connected to the connection component 12, without having to directly use the power grid to charge the target electrical equipment. This can alleviate the pressure on the transformer connected to the power grid. Therefore, this embodiment does not require the addition of a transformer or the expansion of the transformer capacity, which helps to save the cost of adding the energy storage and charging equipment.

[0164] In some embodiments, this application provides further exemplary descriptions of the relevant content of the first energy storage unit. The first energy storage unit 100 of this application may include, but is not limited to, multiple battery packs, wherein different battery packs have different battery performance parameters. For example, battery performance parameters may include, but are not limited to, battery life parameters and / or remaining battery capacity (State of Charge, SOC).

[0165] For example, the battery pack in the first energy storage unit 100 in this application embodiment may include, but is not limited to, a cascaded battery pack. A cascaded battery pack refers to the process of dismantling, testing, and screening retired power lithium battery packs (such as battery packs retired from passenger cars or commercial vehicles) or cells, and then reassembling them into a healthy battery pack or system to achieve resource reuse.

[0166] The first energy storage unit 100 in this embodiment can store electrical energy in a target battery pack among multiple batteries based on the balance of battery performance parameters when the load on the power grid is less than a preset load threshold.

[0167] For example, when the grid load is less than a preset load threshold, the first energy storage unit 100 can determine a target battery pack from multiple batteries based on the balance of battery performance parameters, and store energy in the target battery pack. It should be noted that "target battery pack" is a general term and can refer to one or more target battery packs.

[0168] It should be understood that in this embodiment, the target battery pack in the first energy storage unit 100 may be prioritized for energy storage. If the energy storage of the target battery pack is completed, and there is still energy available for charging the energy storage device, energy storage may be performed on other battery packs in the first energy storage unit 100 based on the balance of battery performance parameters, and so on, until there is no energy available for charging the energy storage device or all battery packs in the first energy storage unit 100 have completed energy storage.

[0169] In this embodiment, the charging component 11 can specifically charge the target electrical device according to the target charging mode by using the electrical energy stored in the target battery pack when the connection component 12 is connected to the target electrical device.

[0170] In summary, in this embodiment, the first energy storage unit can store electrical energy in a target battery pack among multiple batteries based on the balance of battery performance parameters when the grid load is less than a preset load threshold. Furthermore, when a target electrical device is connected to the connection component, the charging component can utilize the electrical energy stored in the target battery pack to charge the target electrical device according to the target charging mode via the connection component. Therefore, in this embodiment, by storing electrical energy in a target battery pack among multiple batteries based on the balance of battery performance parameters and using the stored electrical energy to charge the target electrical device, the method can save on the cost of adding storage and charging equipment and also improve the service life of the first energy storage unit.

[0171] In some embodiments, FIG2 is a schematic diagram of the structure of a storage and charging device provided in other embodiments of the present application. As shown in FIG2, in order to further increase the rated energy of the storage and charging device, the energy storage component 10 of the present application embodiment may further include a second energy storage unit 101, wherein the charge and discharge rate of the second energy storage unit 101 is greater than the charge and discharge rate of the first energy storage unit 100.

[0172] In this embodiment of the application, the ratio between the rated energy of the second energy storage unit 101 and the maximum charge / discharge power of the second energy storage unit 101 is less than or equal to a second preset ratio threshold, wherein the second preset ratio threshold is less than a first preset ratio threshold. For example, the ratio between the rated energy of the second energy storage unit 101 and the maximum charge / discharge power of the second energy storage unit 101 is less than or equal to (i.e., not greater than) 1:3.

[0173] The second energy storage unit 101 in this embodiment can store electrical energy when the grid load is less than a preset load threshold. For example, the second energy storage unit 101 and the first energy storage unit 100 can store electrical energy separately when the grid load is less than the preset load threshold. In another example, the second energy storage unit 101 can store electrical energy when the grid load is less than the preset load threshold and the first energy storage unit 100 has completed its energy storage.

[0174] Furthermore, considering the need to save on electricity costs, the second energy storage unit 101 can store electricity when the grid load is less than a preset load threshold and the current period is a low-price period for grid electricity, so as to save on the cost of electricity storage.

[0175] The charging component 11 in this embodiment can also charge the target electrical device according to the target charging mode by using the electrical energy stored in the first energy storage unit 100 and / or the second energy storage unit 101 through the connection component 12 when the connection component 12 is connected to the target electrical device.

[0176] In one possible implementation, the charging component 11 can specifically utilize the electrical energy stored in the first energy storage unit 100 to charge the target electrical device according to the target charging mode via the connection component 12. If the remaining electrical energy in the first energy storage unit 100 is less than the first preset electrical energy threshold, the charging component 11 can utilize the electrical energy stored in the second energy storage unit 101 to charge the target electrical device according to the target charging mode via the connection component 12.

[0177] In this implementation, the charging component 11 prioritizes using the electrical energy stored in the first energy storage unit 100 to charge the target electrical device. When the remaining electrical energy in the first energy storage unit 100 is insufficient, the electrical energy stored in the second energy storage unit 101 is then used to charge the target electrical device. Since the first energy storage unit 100 can be cooled naturally, prioritizing the use of the electrical energy stored in the first energy storage unit 100 for charging helps save thermal management costs.

[0178] In another possible implementation, the charging component 11 can specifically use the electrical energy stored in the second energy storage unit 101 to charge the target electrical device according to the target charging mode through the connection component 12. When the remaining electrical energy in the second energy storage unit 101 is less than the second preset electrical energy threshold, the electrical energy stored in the first energy storage unit 100 can be used to charge the target electrical device according to the target charging mode through the connection component 12.

[0179] In this implementation, the charging component 11 prioritizes using the electrical energy stored in the second energy storage unit 101 to charge the target electrical device. When the remaining electrical energy in the second energy storage unit 101 is insufficient, the electrical energy stored in the first energy storage unit 100 is then used to charge the target electrical device. Since the charge / discharge rate of the second energy storage unit is greater than that of the first energy storage unit, prioritizing the use of the electrical energy stored in the second energy storage unit for charging is beneficial to improving the charging speed.

[0180] In another possible implementation, the charging component 11 can specifically utilize the electrical energy stored in the first energy storage unit 100 and the second energy storage unit 101 to charge the target electrical device according to the target charging mode through the connection component 12.

[0181] In summary, in this embodiment, the energy storage component further includes a second energy storage unit with a charge / discharge rate greater than that of the first energy storage unit. The second energy storage unit can store electrical energy when the grid load is less than a preset load threshold. Furthermore, the charging component can, when the connection component is connected to a target electrical device, utilize the electrical energy stored in the first and / or second energy storage units to charge the target electrical device according to the target charging mode. Therefore, in this embodiment, by using the charging component to charge the target electrical device with the electrical energy stored in the first and / or second energy storage units when the connection component is connected to the target electrical device, the flexibility of charging the target electrical device can be improved, thereby enhancing the power supply stability of the energy storage and charging device.

[0182] In some embodiments, FIG3 is a schematic diagram of the structure of a storage and charging device provided in other embodiments of this application. As shown in FIG3, the energy storage component 10 in the embodiments of this application can be connected to the DC bus B. DC Connection. Specifically, the energy storage component 10 can store DC bus B when the grid load is less than a preset load threshold. DC The electrical energy provided, and the power supplied to DC bus B under preset discharge conditions. DC Output electrical energy.

[0183] For example, the power grid can be connected to DC bus B via a transformer and a bidirectional AC / DC converter. DC The connection includes a bidirectional AC / DC converter used for AC / DC conversion of electrical energy.

[0184] For example, the energy storage component 10 can be connected to the DC bus B through a first charge / discharge path with switchable on / off states. DC Connection. Specifically, when the first charge / discharge path is in the conducting state, the energy storage component 10 is connected to the DC bus B. DC Electrical energy can be transferred between them; when the first charge / discharge path is open, the energy storage component 10 and the DC bus B... DC Electrical energy cannot be transferred between them.

[0185] In this embodiment, the energy storage units (such as the first energy storage unit and / or the second energy storage unit) in the energy storage component 10 can store DC bus B when the grid load is less than a preset load threshold. DC The electrical energy provided by DC bus B DC Electrical energy can come from the power grid, passing through a transformer and a bidirectional AC / DC converter to the DC bus B. DC The electrical energy provided.

[0186] In addition, the energy storage units in the energy storage assembly 10 (such as the first energy storage unit and / or the second energy storage unit) also discharge to the DC bus B under preset discharge conditions.DC Output electrical energy so that it can be transmitted through DC bus B DC Electrical energy can be transferred to devices or components that require it. For example, preset discharge conditions may include, but are not limited to, receiving a discharge command or receiving a discharge request.

[0187] In this embodiment, the energy storage component is connected to the DC bus, which can store electrical energy provided by the DC bus when the load of the power grid is less than a preset load threshold, and output electrical energy to the DC bus when the preset discharge conditions are met. This not only improves the convenience of storing and releasing electrical energy, but also improves the convenience of power transmission to other devices or components on the DC bus.

[0188] In some embodiments, as shown in FIG3, the charging component 11 in this application embodiment can be connected to the DC bus B. DC The connection is made so that an indirect connection with the energy storage component 10 can be achieved.

[0189] The charging component 11 in this embodiment can also utilize DC bus B when the connection component 12 is connected to a target electrical device. DC The supplied electrical energy is used to charge the target electrical equipment through the connection component 12 according to the target charging mode.

[0190] It should be understood that DC bus B DC The provided electrical energy may include, but is not limited to, any of the following: the energy storage unit in the energy storage component 10 supplies power to the DC bus B when preset discharge conditions are met. DC Output electrical energy, DC bus B DC Other energy storage and charging devices, other components, or other units connected to the DC bus B DC The electrical energy output.

[0191] In this embodiment, the charging component is connected to the DC bus. When the connecting component is connected to the target electrical device, it can also use the power provided by the DC bus to charge the target electrical device according to the target charging mode. This allows the charging component to obtain sufficient power from the DC bus to charge the target electrical device, thereby improving the charging efficiency of the target electrical device.

[0192] In some embodiments, as shown in FIG3, the connection component 12 in this application embodiment can also be connected to the DC bus BDC. The connection component 12 can also transmit electrical energy from the target electrical equipment to the DC bus BDC. DC To facilitate DC bus B DC The electrical energy of the target electrical equipment can be transmitted to the power grid, or DC bus B. DCConnecting to other energy storage and charging devices, components, or units enables Vehicle to Grid (VtoG) or Vehicle to Energy Storage System (VtoESS) functionality. VtoG refers to the vehicle's electrical energy charging the grid; VtoESS refers to the vehicle's electrical energy charging energy storage devices or other components.

[0193] It should be understood that at DC bus B DC If the provided electrical voltage can meet the voltage requirements of the target electrical equipment, the connection component 12 can also directly utilize the DC bus B. DC The provided electrical energy is used to charge the target electrical equipment.

[0194] For example, the connection component 12 can be connected to the DC bus B via an AC path with switchable on / off states. DC Connection. Specifically, when the AC path is in the conducting state, connection component 12 is connected to DC bus B. DC Electrical energy can be transferred between them; when the AC path is open, the connecting component 12 and the DC bus B... DC Electrical energy cannot be transferred between them.

[0195] As can be seen, in this embodiment of the application, the connection component is also connected to the DC bus, and the connection component can also transmit the electrical energy of the target electrical equipment to the DC bus, which can realize the VtoG function or VtoESS function, which is beneficial to improving the power supply flexibility of the power grid system.

[0196] In some embodiments, FIG4 is a schematic diagram of the structure of a storage and charging device provided in other embodiments of this application. As shown in FIG4, in order to better realize the linkage control of the storage and charging device, the storage and charging device in this embodiment of the application may further include a control component 13 connected to the energy storage component 10 and the charging component 11. It should be understood that the control component 13 may also be connected to the connection component 12, so that when the connection component 12 is connected to a target electrical device, it can send an electrical device connection signal to the control component 13, so that the control component 13 can know that the connection component 12 is connected to a target electrical device based on the electrical device connection signal. The electrical device connection signal may include, but is not limited to, the identification information of the connection component 12 and / or the identification information of the target electrical device.

[0197] The control component 13 in this embodiment can control the charging component 11 to use the electrical energy stored in the energy storage component 10 to charge the target electrical device according to the target charging mode through the connection component 12.

[0198] For example, when the control component 13 learns that the connection component 12 is connected to a target electrical device, it controls the charging component 11 to use the electrical energy stored in the energy storage component 10 (e.g., the first energy storage unit 100 and / or the second energy storage unit 101) to charge the target electrical device through the connection component 12 according to the target charging mode.

[0199] It should be understood that the control component 13 can also control the energy storage component 10 (e.g., the first energy storage unit 100 and / or the second energy storage unit 101) to store electrical energy when the load on the power grid is less than a preset load threshold.

[0200] As can be seen, in the embodiments of this application, the energy storage and charging device may further include a control component connected to the energy storage component and the charging component; the control component can control the charging component to use the electrical energy stored in the energy storage component to charge the target electrical device according to the target charging mode through the connection component, so that the energy storage component and / or charging component in the energy storage and charging device can better coordinate and cooperate, thereby improving the charging efficiency of the energy storage and charging device for the target electrical device.

[0201] Of course, the storage and charging device in this application embodiment may also include other components, such as communication components for transmitting information with other devices, etc.

[0202] In some embodiments, FIG5 is a schematic diagram of the structure of a charging system for electrical equipment provided in some embodiments of this application. As shown in FIG5, the charging system for electrical equipment in the embodiments of this application may include multiple storage and charging devices E. sc Among them, storage and charging equipment E sc The specific structure can be found in the relevant content of the above-mentioned storage and charging device embodiments of this application, and will not be repeated here.

[0203] Each storage and charging device E in the embodiments of this application sc Each device can be connected to the power grid individually. For example, the power grid can be connected to each energy storage device via a transformer and a bidirectional AC / DC converter. As another example, the power grid can be connected to a DC bus via a transformer and a bidirectional AC / DC converter, and each energy storage device E... sc Each can be connected to the DC bus individually. As another example, the power grid can be connected to the DC bus via a transformer, and each energy storage device E... sc Each can be connected to the DC bus via its corresponding bidirectional AC / DC converter. Of course, each energy storage and charging device E... sc It can also be connected to the power grid in other ways.

[0204] In this embodiment of the application, any storage and charging device E sc The charging components in the storage and charging device E sc When the connection component is connected to the first target electrical device, the energy storage device E is used.sc The electrical energy stored in the first energy storage unit is used to charge the first target electrical device through the connection component according to the target charging mode; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0205] It should be noted that any storage and charging device E in the embodiments of this application... sc The implementation methods of each component can be referred to the relevant content in the above-described storage and charging device embodiments of this application, and will not be repeated here.

[0206] In summary, in this embodiment, the charging component in any energy storage device can charge the first target electrical device by utilizing the electrical energy stored in the first energy storage unit, without directly using the grid's electrical energy. This alleviates the demand on the grid and reduces the pressure on the transformer connected to the grid. Therefore, this embodiment eliminates the need to add or expand the transformer, thus saving on the cost of adding the energy storage device. Furthermore, by ensuring that the ratio between the rated energy of the first energy storage unit and its maximum charge / discharge power is greater than or equal to a first preset threshold (i.e., the rated energy of the first energy storage unit is greater than its maximum charge / discharge power), the charge / discharge rate of the first energy storage unit can be reduced. This eliminates the need for a corresponding thermal management system in the energy storage device, further saving on the cost of adding the device. On the other hand, it increases the charge / discharge power of the first energy storage unit, ensuring it meets the charging needs of the electrical device.

[0207] In some embodiments, the maximum charge / discharge power of the first energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode.

[0208] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can charge the first target electrical device through the connection component at a first discharge rate not greater than the first preset discharge rate threshold; the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode.

[0209] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can charge the first target electrical device through the connection component at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate.

[0210] In some embodiments, each storage and charging device E sc The first energy storage unit in the system can store electrical energy when the grid load is less than a preset load threshold.

[0211] In some embodiments, the first energy storage unit includes multiple battery packs, wherein the battery performance parameters of different battery packs are different; specifically, the first energy storage unit can store electrical energy in a target battery pack based on the balance of battery performance parameters when the load on the power grid is less than a preset load threshold; wherein the target battery pack is one of the multiple battery packs in the first energy storage unit.

[0212] In some embodiments, the storage and charging device E sc Specifically, when the charging component in the storage and charging device is connected to the first target electrical device via the connection component, it can utilize the electrical energy stored in the target battery pack to charge the first target electrical device according to the target charging mode through the connection component.

[0213] In some embodiments, the storage and charging device E sc The energy storage component also includes a second energy storage unit that can store electrical energy when the grid load is less than a preset load threshold, wherein the charge-discharge rate of the second energy storage unit is greater than that of the first energy storage unit.

[0214] Storage and charging equipment E sc Specifically, when the charging component in the storage and charging device is connected to the first target electrical device via the connection component in the storage and charging device E, the storage and charging device E can be used to charge the device. sc The electrical energy stored in the first energy storage unit and / or the second energy storage unit is used to charge the first target electrical device through the connection component according to the target charging mode; wherein, the ratio between the rated energy and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than a first preset ratio threshold.

[0215] It should be noted that any storage and charging device E in the embodiments of this application... sc The implementation methods of each component can be referred to the relevant content in the above-described storage and charging device embodiments of this application, and will not be repeated here.

[0216] In some embodiments, FIG6 is a schematic diagram of the structure of a charging system for electrical equipment provided in other embodiments of this application. As shown in FIG6, the charging system for electrical equipment may further include: a charging device E with at least one storage device E sc The first supplementary energy storage unit U connected aesu1 .

[0217] For example, at least one storage and charging device E sc It can be used with the first supplementary energy storage unit U aesu1Direct connection. Another example is at least one storage / charging device E. sc It can be used with the first supplementary energy storage unit U aesu1 Indirect connection. For example, at least one storage / charging device E sc It can be connected to the DC bus, the first supplementary energy storage unit U aesu1 It can be connected to the DC bus, enabling the energy storage device E sc With the first supplementary energy storage unit U aesu1 They can be indirectly connected via a DC bus.

[0218] The first supplementary energy storage unit U in the embodiments of this application aesu1 The ratio between the rated energy of the first supplementary energy storage unit Uaesu1 and the maximum charge / discharge power of the first supplementary energy storage unit Uaesu1 is greater than or equal to a first preset supplementary ratio threshold, wherein the first preset supplementary ratio threshold can be a positive number greater than 1. For example, the first supplementary energy storage unit Uaesu1... aesu1 Rated energy and the first supplementary energy storage unit U aesu1 The ratio between the maximum charge and discharge power is greater than or equal to (i.e. not less than) 1:0.5.

[0219] It should be understood that, in the embodiments of this application, through the first supplementary energy storage unit U aesu1 Rated energy and the first supplementary energy storage unit U aesu1 The ratio between the maximum charge and discharge power is greater than or equal to the first preset supplementary ratio threshold, which helps to reduce the first supplementary energy storage unit U. aesu1 The charge / discharge rate is set so that the charging system for electrical equipment does not require a first supplementary energy storage unit U. aesu1 The corresponding thermal management system can use natural cooling, which can save on the cost of the charging system for electrical equipment.

[0220] In some embodiments, the rated energy of the first supplementary energy storage unit is related to the total input power and total rated energy of each energy storage device.

[0221] For example, the rated energy of the first supplementary energy storage unit and the total input power and total rated energy of each storage and charging device can satisfy the following relationship: Eess≤Pin*C1*100%-Ecc.

[0222] Where Eess represents the rated energy of the first supplementary energy storage unit; Pin represents the total input power corresponding to each energy storage device; C1 represents the first preset coefficient; and Ecc represents the total rated energy corresponding to each energy storage device. For example, C1 can be any value from 4 to 12.

[0223] It should be understood that when each energy storage and charging device is equipped with a bidirectional AC / DC converter, the total input power of each energy storage and charging device can be equal to the sum of the power of the bidirectional AC / DC converters corresponding to each energy storage and charging device; when each energy storage and charging device is equipped with the same bidirectional AC / DC converter, the total input power of each energy storage and charging device can be equal to the power of the bidirectional AC / DC converter commonly associated with each energy storage and charging device.

[0224] Of course, the rated energy of the first supplementary energy storage unit and the total input power and total rated energy of each energy storage device can also satisfy other equivalent or modified relationships of the above relationship.

[0225] In this embodiment, by relating the rated energy of the first supplementary energy storage unit to the total input power and total rated energy of each energy storage and charging device, the rated energy of the first supplementary energy storage unit can be reasonably configured, so that the energy storage and replenishment time of the first supplementary energy storage unit can be less than or equal to twelve hours.

[0226] In some embodiments, the maximum charging and discharging power of the first supplementary energy storage unit can be greater than or equal to the maximum preset charging and discharging power corresponding to the target charging mode, which is beneficial to ensure that the charging and discharging power of the first supplementary energy storage unit can meet the charging needs of the target electrical equipment according to the target charging mode.

[0227] The first supplementary energy storage unit U in the embodiments of this application aesu1 It can store electrical energy when the grid load is less than a preset load threshold, and can power at least one energy storage and charging device E when the grid load is not less than the preset load threshold. sc Provides electrical energy.

[0228] For example, the first supplementary energy storage unit U aesu1 When the grid load is less than a preset load threshold, it can store electrical energy separately with the energy storage components of each Esc energy storage device.

[0229] Another example is the first supplementary energy storage unit U. aesu1 It can be used when the grid load is less than a preset load threshold, and each energy storage and charging device E sc When the energy storage components complete the energy storage, energy storage is performed.

[0230] Furthermore, considering the need to save on electricity costs, the first supplementary energy storage unit U aesu1 Energy storage can be performed when the grid load is less than a preset load threshold and the current period is a low-price period for grid electricity, so as to save energy storage costs.

[0231] In some embodiments, the first supplementary energy storage unit U aesu1It is also possible to provide at least one energy storage and charging device E, provided that the grid load is not less than a preset load threshold. sc It provides electrical energy without directly utilizing the grid's power for the energy storage device E. sc Providing electrical energy can further alleviate the demand on the power grid, thereby further easing the pressure on the transformer connected to the power grid. Therefore, the embodiments of this application do not require the addition of transformers or the expansion of transformer capacity, which helps to save the cost of adding energy storage equipment.

[0232] In addition, through the first supplementary energy storage unit U aesu1 Rated energy and the first supplementary energy storage unit U aesu1 The ratio between the maximum charge and discharge power is greater than or equal to the first preset supplementary ratio threshold, which helps to reduce the first supplementary energy storage unit U. aesu1 The charge / discharge rate is set so that the charging system for electrical equipment does not require a first supplementary energy storage unit U. aesu1 The corresponding thermal management system can save on the cost of charging systems for electrical equipment.

[0233] In some embodiments, the first supplementary energy storage unit U of this application aesu1 The relevant content will be further described and illustrated with examples. The first supplementary energy storage unit U in this application embodiment... aesu1 This may include, but is not limited to, multiple supplementary battery packs, wherein different supplementary battery packs have different battery performance parameters. For example, battery performance parameters may include, but are not limited to, battery life parameters and / or remaining battery capacity.

[0234] The first supplementary energy storage unit U in the embodiments of this application aesu1 Specifically, when the grid load is less than a preset load threshold, energy can be stored in the target supplementary battery pack among multiple supplementary battery packs based on the balance of battery performance parameters. When the grid load is not less than a preset load threshold, the energy stored in the target supplementary battery pack can be used to provide power to at least one energy storage and charging device.

[0235] It should be noted that the first supplementary energy storage unit U aesu1 For possible methods of storing and releasing electrical energy, please refer to the relevant content regarding the first energy storage unit's storage and release of electrical energy in the above-described embodiments of the energy storage and charging device in this application, which will not be repeated here.

[0236] It should be understood that in the first supplementary energy storage unit U aesu1 and various storage and charging equipment E sc With all units connected to the DC bus, the first supplementary energy storage unit U aesu1It can also provide power to other equipment or components connected to the DC bus by using the electrical energy stored in the target supplementary battery pack, provided that the load on the power grid is not less than the preset load threshold.

[0237] In summary, in this embodiment, the first supplementary energy storage unit can store energy in a target supplementary battery pack among multiple supplementary battery packs based on the balance of battery performance parameters when the grid load is less than a preset load threshold. Furthermore, when the grid load is not less than the preset load threshold, the first supplementary energy storage unit can use the energy stored in the target supplementary battery pack to provide power to at least one energy storage and charging device. Therefore, in this embodiment, by storing energy in a target supplementary battery pack among multiple supplementary batteries based on the balance of battery performance parameters and using the energy stored in the target supplementary battery pack to provide power to the energy storage and charging device, the cost of the charging system for the electrical equipment can be reduced. This not only improves the power supply stability of the energy storage and charging device but also extends the service life of the first supplementary energy storage unit.

[0238] In some embodiments, FIG7 is a schematic diagram of the structure of a charging system for electrical equipment provided in other embodiments of this application. As shown in FIG7, in order to further increase the rated energy of the charging system for electrical equipment, the charging system for electrical equipment in the embodiments of this application may further include: at least one storage and charging device E sc The second supplementary energy storage unit U connected aesu2 Among them, the second supplementary energy storage unit U aesu2 The charge / discharge rate is greater than that of the first supplementary energy storage unit U. aesu1 The charge / discharge rate.

[0239] The second supplementary energy storage unit U in the embodiments of this application aesu2 Rated energy and second supplementary energy storage unit U aesu2 The ratio between the maximum charging and discharging power is less than or equal to the second preset supplementary ratio threshold, wherein the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0240] The second supplementary energy storage unit U in the embodiments of this application aesu2 It can store electrical energy when the load on the power grid is less than a preset load threshold, and provide electrical energy to at least one energy storage and charging device when the load on the power grid is not less than the preset load threshold and the remaining electrical energy of the first supplementary energy storage unit is less than the preset electrical energy threshold.

[0241] For example, the second supplementary energy storage unit U aesu2 It can connect with the first supplementary energy storage unit U when the grid load is less than a preset load threshold. aesu1 Electrical energy is stored separately.

[0242] Another example is the second supplementary energy storage unit U. aesu2 It can be implemented when the grid load is less than a preset load threshold, and the first supplementary energy storage unit U aesu1 Once energy storage is complete, energy storage is performed.

[0243] Furthermore, considering the need to save on electricity costs, a second supplementary energy storage unit U aesu2 Energy storage can be performed when the grid load is less than a preset load threshold and the current period is a low-price period for grid electricity, so as to save energy storage costs.

[0244] In some embodiments, the second supplementary energy storage unit U aesu2 Furthermore, when the grid load is not less than a preset load threshold and the remaining energy of the first supplementary energy storage unit is less than a preset energy threshold, at least one energy storage and charging device E can be provided. sc Provides electrical energy.

[0245] In some embodiments, the second supplementary energy storage unit U aesu2 It is also possible to provide at least one energy storage and charging device E, provided that the grid load is not less than a preset load threshold. sc Provides electrical energy, and in the second supplementary energy storage unit U aesu2 If the remaining electrical energy is less than a preset electrical energy threshold, the supply of electrical energy to at least one energy storage device will be stopped, so that the first supplementary energy storage unit U can be used to supply electrical energy. aesu1 Provide electrical energy to at least one energy storage device.

[0246] In some embodiments, the second supplementary energy storage unit U aesu2 It can also be used in conjunction with the first supplementary energy storage unit U, provided that the grid load is not less than the preset load threshold. aesu1 Together for at least one storage and charging device E sc Provides electrical energy.

[0247] It should be understood that in the second supplementary energy storage unit U aesu2 and at least one storage and charging device E sc With all units connected to the DC bus, the second supplementary energy storage unit U aesu2 It can also provide power to other equipment (such as AC charging equipment) or components connected to the DC bus when the load on the power grid is not less than a preset load threshold.

[0248] In summary, in the embodiments of this application, the charging system for electrical equipment may further include: a second supplementary energy storage unit connected to at least one energy storage device; by providing power to at least one energy storage device through the second supplementary energy storage unit and / or the first supplementary energy storage unit, the flexibility of providing power to the energy storage device can be improved, thereby further improving the power supply stability of the energy storage device.

[0249] In some embodiments, FIG8 is a schematic diagram of the structure of a charging system for electrical equipment provided in other embodiments of this application. As shown in FIG8, the charging system for electrical equipment in this embodiment of the application may further include: at least one storage charging device E sc Connected power generation unit U g For example, power generation unit U g This may include, but is not limited to, photovoltaic power generation units and / or wind power generation units.

[0250] For example, at least one storage and charging device E sc Can be used with power generation unit U g Direct connection. Another example is at least one storage / charging device E. sc Can be used with power generation unit U g Indirect connection. For example, at least one storage / charging device E sc It can be connected to the DC bus, generator unit U g It can be connected to the DC bus, enabling the energy storage device E sc With power generation unit U g They can be indirectly connected via a DC bus.

[0251] The power generation unit U in this application embodiment g It can provide power to at least one energy storage and charging device E, provided that the grid load is not less than a preset load threshold. sc It provides electrical energy without directly utilizing the grid's power for the energy storage device E. sc Providing electrical energy can further alleviate the demand on the power grid, thereby further easing the pressure on the transformer connected to the power grid. Therefore, the embodiments of this application do not require the addition of transformers or the expansion of transformer capacity, which helps to save the cost of adding energy storage equipment.

[0252] It should be understood that in power generation unit U g and at least one storage and charging device E sc When all are connected to the DC bus, the power generation unit U g It can also provide power to other equipment (such as AC charging equipment) or components connected to the DC bus when the load on the power grid is not less than a preset load threshold.

[0253] In summary, in the embodiments of this application, the charging system for electrical equipment may further include: a power generation unit connected to at least one energy storage device; by providing power to at least one energy storage device through the power generation unit when the load of the power grid is not less than a preset load threshold, the flexibility of providing power to the energy storage device can be further improved, thereby helping to further improve the power supply stability of the energy storage device.

[0254] In some embodiments, FIG9 is a schematic diagram of the structure of a charging system for electrical equipment provided in other embodiments of this application. As shown in FIG9, the charging system for electrical equipment in this embodiment may further include: multiple AC charging devices E acc Among them, multiple AC charging devices E acc It can be connected to at least one energy storage device and a supplementary energy storage unit (e.g., a first supplementary energy storage unit and / or a second supplementary energy storage unit), respectively.

[0255] For example, multiple AC charging devices E acc It can be directly connected to at least one energy storage device and supplementary energy storage unit, respectively. Another example is multiple AC charging devices E. acc It can be indirectly connected to at least one energy storage device and supplementary energy storage unit, respectively. For example, multiple AC charging devices E acc It can be connected to the DC bus, with at least one energy storage device and an additional energy storage unit each connected to the DC bus, enabling multiple AC charging devices E acc Indirect connection between the device and at least one energy storage unit and supplementary energy storage units can be achieved via a DC bus. Alternatively, multiple AC charging devices E... acc Each device can be connected to the AC bus. At least one energy storage device and a supplementary energy storage unit can be connected to the AC bus via the DC bus and bidirectional AC / DC, respectively, enabling multiple AC charging devices to be connected to the AC bus. acc It can achieve indirect connection with at least one energy storage device and supplementary energy storage unit.

[0256] The AC charging device E in this embodiment of the application acc It can charge the second target electrical device connected to the AC charging device by using the power provided by the power grid when the second target electrical device is connected and the load of the power grid is less than a preset load threshold.

[0257] It should be understood that AC charging equipment E acc When the load on the power grid is less than the preset load threshold, the method of using the power provided by the power grid to charge the second target electrical equipment connected to the AC charging equipment will not affect the power grid supply to the basic load equipment through the transformer, and can also make full and reasonable use of the electrical energy surplus within the capacity of the existing transformer.

[0258] As can be seen, in this embodiment, the method of charging the second target electrical device connected to the AC charging device using the power provided by the power grid when the AC charging device is connected to a second target electrical device and the load of the power grid is less than a preset load threshold, on the one hand, does not affect the power grid's supply of power to the basic load device through the transformer, eliminating the need to add a transformer or expand its capacity, thus saving the cost of adding the energy storage device. On the other hand, it can also make full and reasonable use of the existing transformer capacity's energy surplus, thereby improving the transformer's energy utilization rate.

[0259] In some embodiments, the AC charging device E in this application embodiment acc Furthermore, when the grid load is not less than a preset load threshold, at least one energy storage and charging device E can be used. sc Or the first supplementary energy storage unit U aesu1 The provided electrical energy is for AC charging equipment E acc The second target device is then charged.

[0260] In this embodiment of the application, AC charging device E acc When the grid load is not less than a preset load threshold, at least one energy storage and charging device E is used. sc Or the first supplementary energy storage unit U aesu1 The provided electrical energy is for AC charging equipment E acc The method of charging the second target electrical device does not require directly using the power grid to charge the second target electrical device, which can alleviate the power demand on the power grid and thus alleviate the pressure on the transformer connected to the power grid. Therefore, the embodiments of this application do not require the addition of a transformer or the expansion of the transformer capacity, which helps to save the cost of adding the energy storage and charging equipment.

[0261] It should be understood that in AC charging equipment E acc At least one storage and charging device E sc and / or the first supplementary energy storage unit U aesu1 When all components are connected to the DC bus, the AC charging device E acc When the grid load is not less than the preset load threshold, other equipment (such as a second supplementary energy storage unit or a power generation unit) or components connected to the DC bus can also be used to provide electrical energy for AC charging equipment E. acc The second target device is then charged.

[0262] In some embodiments, in order to better realize the linkage control of the electrical equipment charging system, the electrical equipment charging system of this application embodiment may further include: a monitoring device connected to each storage and charging device.

[0263] For example, the monitoring device can be a device independent of each storage and charging device, wherein the monitoring device can be connected to the control components in each storage and charging device respectively.

[0264] Another example is that the monitoring device can be a control component in each energy storage and charging device, that is, this control component serves as the overall control component of the charging system for the electrical equipment. In this case, each non-overall control component in the energy storage and charging device is connected to the overall control component.

[0265] Another example is that the monitoring device can be a control component in other devices (e.g., AC charging devices or supplementary energy storage units) in the electrical equipment charging system, that is, the control component is the overall control component of the electrical equipment charging system.

[0266] The monitoring device in this embodiment can control the charging component in any energy storage device. When the first target electrical device is connected to the connection component in the energy storage device, the device can use the electrical energy stored in the energy storage component to charge the first target electrical device according to the target charging mode through the connection component.

[0267] For example, when the monitoring device learns that a first target electrical device is connected to the connection component in any energy storage device, it can control the charging component in the energy storage device to use the electrical energy stored in the energy storage component (e.g., the first energy storage unit and / or the second energy storage unit) in the energy storage device to charge the first target electrical device according to the target charging mode through the connection component.

[0268] It should be understood that the monitoring equipment can also control other storage and charging devices, supplementary energy storage units (such as the first supplementary energy storage unit or the second supplementary energy storage unit), and / or power generation units in the charging system of the electrical equipment to replenish the energy of the storage and charging device when it learns that the connection component in any storage and charging device is connected to the first target electrical equipment and the remaining power of the energy storage component in the storage and charging device is insufficient, so that the charging component in the storage and charging device can charge the first target electrical equipment through the connection component according to the target charging mode.

[0269] It should be understood that the monitoring equipment can also control the energy storage components in each energy storage and charging device to store electrical energy, the first supplementary energy storage unit to store electrical energy, and / or the second supplementary energy storage unit to store electrical energy when the load on the power grid is less than a preset load threshold.

[0270] Furthermore, considering the need to save on electricity costs, the monitoring equipment can control the energy storage components in each energy storage and charging device to store electricity, the first supplementary energy storage unit to store electricity, and / or the second supplementary energy storage unit to store electricity when the grid load is less than the preset load threshold and the current period is a low time for grid electricity prices, so as to save on the cost of electricity storage.

[0271] In some embodiments, based on the above embodiments, the charging system for electrical equipment in this application includes at least one storage and charging device E. sc First supplementary energy storage unit U aesu1 Second supplementary energy storage unit U aesu2 Photovoltaic power generation unit U g-p and at least one AC charging device E acc Taking this as an example, we will provide an exemplary description of the overall structure of a charging system for electrical equipment.

[0272] Figure 10 is a structural schematic diagram of a charging system for electrical equipment provided in some other embodiments of this application. As shown in Figure 10, the charging system for electrical equipment in this embodiment of the application may further include: m storage and charging devices E sc First supplementary energy storage unit U aesu1 Second supplementary energy storage unit U aesu2 Photovoltaic power generation unit U g-p and n AC charging devices E acc Where m and n are both integers greater than 0.

[0273] For example, the storage and charging device E in this application embodiment sc It can be a low-power input, high-power output energy storage device to enable fast charging and supercharging functions. For example, energy storage device E sc The input power can be less than or equal to 150kW, and the energy storage and charging equipment E sc The output power of the charging components can be greater than or equal to 360kW.

[0274] For example, the storage and charging device E in this application embodiment sc The charge / discharge rate can be less than that of the energy storage device E. sc The charge / discharge rate, the energy storage device E sc The charging and discharging speed can be less than that of the energy storage device E. sc The charging and discharging speed. For example, the charging and discharging device E sc It can be used to implement slow charging functionality.

[0275] For example, each device or unit in the electrical equipment charging system can be connected to the DC bus B. DC Connection, power grid G p Through transformer T and AC bus B AC Connection, AC bus B AC With DC bus B DC A bidirectional AC / DC converter can be configured between them. For example, in Figure 10, each storage / charging device E... sc Each is connected to AC bus B via its corresponding bidirectional AC / DC converter. AC Connection; of course, multiple storage and charging devices Esc They can share the same bidirectional AC / DC converter and AC bus B. AC Connection. It should be understood that AC bus B... AC It can also be connected to basic load devices.

[0276] It should be noted that each storage and charging device's Esc is connected to the AC bus B via a corresponding bidirectional AC / DC converter. AC When connected, each storage and charging device E sc The corresponding bidirectional AC / DC converter can be installed in the energy storage device E. sc In the middle, or it can be set in the storage and charging device E sc outside.

[0277] The storage and charging device E in this embodiment of the application sc The system may include, but is not limited to, an energy storage component 10, a charging component 11, a connection component 12, a control component 13, and a communication component 14. For example, the charging component 11 may include, but is not limited to, a bidirectional DC / DC converter; of course, it may also include other components, which can be configured according to actual needs. The energy storage component 10 can be connected to the DC bus B through the first charging / discharging path L1. DC The charging component 11 can be connected to the DC bus B. DC The connection component 12 can be connected to the DC bus B through the second charge / discharge path L2. DC The connection is made between the charging component 11 and the connection component 12. Specifically, when the first charge / discharge path L1 is in the conducting state, the energy storage component 10 can draw energy from the DC bus B. DC Obtain electrical energy, or it can be supplied to DC bus B. DC Provide electrical energy; with the second charge / discharge path L2 in the conducting state, the connecting component 12 can supply power to the DC bus B. DC Provides electrical energy; of course, connection component 12 can also draw power from DC bus B. DC Obtain electrical energy.

[0278] For example, any charge / discharge path involved in the embodiments of this application may include, but is not limited to, a controllable switch, so as to switch the on / off state of the charge / discharge path.

[0279] The first supplementary energy storage unit U in the embodiments of this application aesu1 This may include, but is not limited to, p supplementary battery packs and supplementary control components; wherein, the supplementary control components can be connected to each of the p supplementary battery packs. Additionally, each supplementary battery pack can be connected to one end of the supplementary path L3 via a corresponding bidirectional DC / DC converter, and the other end of the supplementary path can be connected to the DC bus B. AC Connection. Specifically, when the supplementary path L3 is in the conducting state, the first supplementary energy storage unit U... aesu1 From DC bus BDC Obtain electrical energy, or it can be supplied to DC bus B. DC Provides electrical energy.

[0280] For example, the supplementary path in the embodiments of this application may include, but is not limited to, a controllable switch, so as to switch the on / off state of the supplementary path L3.

[0281] In addition, the power of the bidirectional DC / DC converter corresponding to any supplementary battery pack in the embodiments of this application is related to the electrical energy of the supplementary battery pack.

[0282] For example, the power of any supplementary battery pack corresponding to the bidirectional DC / DC converter and the electrical energy of the supplementary battery pack can satisfy the following relationship: Pdcdci=Eessi*C2*100%.

[0283] Where Pdcdci represents the bidirectional DC / DC power corresponding to the supplementary battery pack i; Eessi represents the electrical energy of the supplementary battery pack i; and C2 represents the second preset coefficient. For example, C2 can be any value from 0.1 to 0.5.

[0284] Of course, the power of any additional battery pack corresponding to the bidirectional DC / DC converter and the electrical energy of the additional battery pack can also satisfy other variations or equivalent relationships of the above relationship.

[0285] The AC charging device E in this embodiment of the application acc This may include, but is not limited to, AC charging piles and corresponding AC control components. Additionally, each AC charging pile can be connected to one end of the AC path L4 via a corresponding bidirectional DC / AC connection, and the other end of the AC path can be connected to the DC bus B. AC Connection. Specifically, when the AC path is open, the AC charging station can connect from DC bus B. DC Obtain electrical energy.

[0286] For example, the AC path L4 in the embodiments of this application may include, but is not limited to, a controllable switch so that the on / off state of the AC path L4 can be switched.

[0287] The photovoltaic power generation unit U in this embodiment of the application g-p This may include, but is not limited to, k photovoltaic panels, maximum power point tracking (MPPT) devices corresponding to each photovoltaic panel, and photovoltaic control components.

[0288] It should be noted that, in this embodiment of the application, the control component of a certain device in the power charging system of the monitoring device is used as an example. Therefore, the control components of each device in Figure 10 can be interconnected so that the monitoring device can control the operation of each device.

[0289] Figure 11 is a schematic diagram of the cloud architecture provided in an embodiment of this application. As shown in Figure 11, in this embodiment, the control components of each device are connected to the cloud service through corresponding communication components based on network communication technology. The monitoring device can also be connected to the cloud service through network communication technology. That is, each control component and the monitoring device can be indirectly connected through the cloud service. The network communication technology may include, but is not limited to, fourth-generation (4G) or fifth-generation (5G) communication technology. Therefore, this embodiment achieves intelligent monitoring and control through cloud services and monitoring devices.

[0290] In addition, the charging system for electrical equipment may also include an energy meter connected to the transformer so that the transformer's power can be detected.

[0291] Figure 12 is a schematic diagram of the structure of a charging system for electrical equipment provided in some other embodiments of this application. As shown in Figure 12, the charging system for electrical equipment in this embodiment of the application may further include: m storage and charging devices E sc First supplementary energy storage unit U aesu1 Second supplementary energy storage unit U aesu2 Photovoltaic power generation unit U g-p and n AC charging devices E acc Unlike Figure 10, Figure 11 shows n AC charging devices E. acc Directly connected to AC bus B AC connect.

[0292] The AC charging device E in this embodiment of the application acc This may include, but is not limited to, AC charging piles and corresponding AC control components, wherein each AC charging pile can be connected to AC bus B. AC connect.

[0293] Referring to Figures 10 and 12, the charging system for electrical equipment according to an embodiment of this application may include a storage and charging device E. sc First supplementary energy storage unit U aesu1 AC charging equipment E acc A second supplementary energy storage unit, U, can also be selected. aesu2 and photovoltaic power generation unit U g-p This achieves a full-scenario charging architecture. When the grid load is less than a preset load threshold, the grid supplies AC charging equipment (E) with power. acc It provides electrical energy and can also power the energy storage and charging equipment Esc and the first supplementary energy storage unit U. aesu1 Second supplementary energy storage unit U aesu2 Energy replenishment can be achieved by utilizing energy storage and charging equipment E, provided that the grid load is not less than a preset load threshold.sc Add energy storage units or photovoltaic power generation units U g-p E intelligently provides AC charging for devices acc Provides electrical energy, and supplements energy storage units or photovoltaic power generation units U g-p It can also intelligently provide E for storage and charging devices. sc It provides electrical energy so that energy can be intelligently distributed without the need to add transformers or expand transformer capacity, thereby enabling the energy storage and charging equipment E sc DC charging and AC charging equipment E acc A full-scenario charging solution for AC charging.

[0294] In some embodiments, based on the above embodiments, this application provides an exemplary description of a full-scenario charging control method for a power device charging system. Figure 13 is a schematic flowchart of a full-scenario charging control method for a power device charging system provided in some embodiments of this application. As shown in Figure 13, the method of this application embodiment may include the following steps:

[0295] Step S1301: The monitoring equipment determines whether a connection signal of the electrical equipment is detected.

[0296] If a connection signal for an electrical device is detected, proceed to step S1302; if no connection signal for an electrical device is detected, proceed to step S1313.

[0297] Step S1302: The monitoring equipment determines whether the connection component of the charging equipment is connected to the target electrical equipment.

[0298] If the connection component of the energy storage and charging device is connected to a target electrical device, then step S1303 is executed; if the connection component of the energy storage and charging device is not connected to a target electrical device, then step S1305 is executed.

[0299] Step S1303: The monitoring equipment controls the storage and charging equipment to charge the target electrical equipment according to the target charging mode through the connection component.

[0300] For example, the energy storage and charging device can use the electrical energy stored in the energy storage components of the energy storage and charging device to charge the target electrical equipment. As another example, the energy storage and charging device can also use the electrical energy provided by supplementary energy storage units and / or power generation units to charge the target electrical equipment.

[0301] Step 1304: The monitoring equipment determines whether the first preset charging end condition has been met.

[0302] For example, the first preset charging termination condition may include, but is not limited to, at least one of the following: the remaining energy of the energy storage component of the energy storage device is less than a preset energy threshold, the energy storage device or the target electrical device has a preset alarm message, or a stop charging request is received from the target electrical device.

[0303] If the first preset charging end condition is met, the process ends; if the first preset charging end condition is not met, the process returns to step S1303.

[0304] Step S1305: The monitoring equipment determines whether the AC charging equipment is connected to the target electrical device.

[0305] If the AC charging device is connected to a target electrical device, proceed to step S1306; if the AC charging device is not connected to a target electrical device, proceed to step S1312.

[0306] Step S1306: The monitoring equipment acquires the detected power of the transformer detected by the power meter.

[0307] Step S1307: The monitoring equipment determines whether the load of the power grid is less than the preset load threshold based on the detected power.

[0308] If the load of the power grid is less than the preset load threshold, then proceed to step S1308; if the load of the power grid is not less than the preset load threshold, then proceed to step S1310.

[0309] Step S1308: The monitoring equipment controls the AC charging equipment to charge the target electrical equipment using the power provided by the power grid.

[0310] Step S1309: The monitoring device determines whether the second preset charging end condition has been met.

[0311] For example, the second preset charging termination condition may include, but is not limited to, at least one of the following: the AC charging device or the target electrical device has a preset alarm message, or a stop charging request is received from the target electrical device.

[0312] If the second preset charging end condition is met, the process ends; if the second preset charging end condition is not met, the process returns to step S1306.

[0313] Step S1310: The monitoring equipment controls the AC charging equipment to charge the target electrical equipment using the electrical energy provided by the energy storage device or the first supplementary energy storage unit.

[0314] Step S1311: The monitoring device determines whether the second preset charging end condition has been met.

[0315] If the second preset charging end condition is met, the process ends; if the second preset charging end condition is not met, the process returns to step S1306.

[0316] Step S1312: The monitoring equipment outputs a prompt message indicating an error in the connection signal of the electrical equipment.

[0317] For example, the prompt information may include, but is not limited to, at least one of the following: text prompt information, voice prompt information, image prompt information, and light prompt information, in order to achieve the alarm objective.

[0318] Step S1313: The monitoring equipment obtains the detected power of the transformer detected by the power meter.

[0319] Step S1314: The monitoring equipment determines whether the load of the power grid is less than the preset load threshold based on the detected power.

[0320] If the load of the power grid is less than the preset load threshold, then proceed to step S1315; if the load of the power grid is not less than the preset load threshold, then proceed to step S1301.

[0321] Step S1315: The monitoring equipment determines whether the current period is a low point in the power grid electricity price.

[0322] If the current time is during a period of low electricity prices, proceed to step S1316; if the current time is not during a period of low electricity prices, proceed to step S1301.

[0323] Step S1316: The monitoring equipment controls the energy storage components in the energy storage and charging equipment to store electrical energy using the power provided by the power grid.

[0324] Step S1317: The monitoring equipment determines whether the load of the power grid is less than the preset load threshold based on the detected power.

[0325] If the load of the power grid is less than the preset load threshold, then proceed to step S1318; if the load of the power grid is not less than the preset load threshold, then proceed to step S1323.

[0326] Step S1318: The monitoring equipment determines whether the energy storage components in the energy storage and charging equipment have completed energy storage.

[0327] If the energy storage components in the energy storage and charging device complete the energy storage, then proceed to step S1319; if the energy storage components in the energy storage and charging device do not complete the energy storage, then proceed to step S1316.

[0328] Step S1319: The monitoring equipment controls the supplementary energy storage unit to store electrical energy using the power provided by the power grid.

[0329] For example, the monitoring equipment can prioritize controlling the first supplementary energy storage unit to store electrical energy, and then control the second supplementary energy storage unit to store electrical energy.

[0330] Step S1320: The monitoring equipment determines whether the load of the power grid is less than the preset load threshold based on the detected power.

[0331] If the load of the power grid is less than the preset load threshold, then proceed to step S1321; if the load of the power grid is not less than the preset load threshold, then proceed to step S1322.

[0332] Step S1321: The monitoring equipment determines whether the supplementary energy storage unit has completed energy storage.

[0333] If the supplementary energy storage unit completes energy storage, the process ends; if the supplementary energy storage unit fails to complete energy storage, step S1319 is executed.

[0334] Step S1322: The monitoring equipment controls the supplementary energy storage unit to stop using the power supplied by the grid for energy storage.

[0335] Step S1323: The monitoring equipment controls the energy storage components in the energy storage and charging equipment to stop using the power supplied by the power grid for energy storage.

[0336] In summary, in this embodiment, when the grid load is less than a preset load threshold, the grid's electrical energy (the surplus energy within the existing transformer capacity) can be used for AC charging and / or equipment replenishment. When the grid load is not less than the preset load threshold, energy storage devices or additional energy storage units can be used directly to provide power to the AC charging devices. Therefore, this embodiment can intelligently allocate energy without adding transformers or expanding transformer capacity, thereby achieving a full-scenario charging solution for both DC charging of energy storage devices and AC charging of AC charging devices.

[0337] In some embodiments, this application provides a power control method for a power storage and charging device. The specific structure of the power storage and charging device in this application can be referred to the relevant content in the above-mentioned power storage and charging device embodiments, which will not be repeated here.

[0338] The method in this application embodiment may include:

[0339] When the charging component in the energy storage and charging device is connected to the target electrical device via the connection component, it uses the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the target electrical device according to the target charging mode via the connection component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0340] In some embodiments, the method further includes:

[0341] The first energy storage unit stores electrical energy when the grid load is less than a preset load threshold.

[0342] In some embodiments, the first energy storage unit stores electrical energy when the grid load is less than a preset load threshold, including:

[0343] When the grid load is less than a preset load threshold, the first energy storage unit stores electrical energy in the target battery pack based on the balance of battery performance parameters; wherein, the target battery pack is one of the multiple battery packs in the first energy storage unit.

[0344] In some embodiments, when a target electrical device is connected to a connection component in the energy storage and charging device, the charging component utilizes the electrical energy stored in the first energy storage unit of the energy storage and charging device to charge the target electrical device according to a target charging mode via the connection component, including:

[0345] When the connection component is connected to the target electrical device, the charging component uses the electrical energy stored in the target battery pack to charge the target electrical device according to the target charging mode through the connection component.

[0346] In some embodiments, the method further includes:

[0347] The second energy storage unit in the energy storage and charging equipment stores electrical energy when the grid load is less than a preset load threshold;

[0348] When the connection component is connected to the target electrical device, the charging component uses the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than a first preset ratio threshold.

[0349] In some embodiments, when the connection component is connected to a target electrical device, the charging component utilizes the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to a target charging mode via the connection component, including:

[0350] The charging component uses the electrical energy stored in the first energy storage unit to charge the target electrical device according to the target charging mode through the connection component. When the remaining electrical energy in the first energy storage unit is less than the first preset electrical energy threshold, the component uses the electrical energy stored in the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component.

[0351] In some embodiments, when the connection component is connected to a target electrical device, the charging component utilizes the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to a target charging mode via the connection component, including:

[0352] The charging component uses the electrical energy stored in the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component. When the remaining electrical energy in the second energy storage unit is less than the second preset electrical energy threshold, the component uses the electrical energy stored in the first energy storage unit to charge the target electrical device according to the target charging mode through the connection component.

[0353] The storage and charging device in this application embodiment can be used to implement the technical solutions in the above-mentioned storage and charging device embodiments of this application. The implementation principle and technical effect are similar, and will not be repeated here.

[0354] In some embodiments, this application provides a power control method for a charging system for electrical equipment. The specific structure of the charging system for electrical equipment in this application can be referred to the relevant content in the above embodiments of the charging system for electrical equipment in this application, and will not be repeated here.

[0355] The method in this application embodiment may include:

[0356] When it is detected that a first target electrical device is connected to the connection component in any energy storage and charging device, the charging component in the energy storage and charging device is controlled to use the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the first target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0357] In some embodiments, the method further includes:

[0358] When the load on the power grid is detected to be less than a preset load threshold, the first energy storage unit of each energy storage and charging device is controlled to store electrical energy.

[0359] In some embodiments, the method further includes:

[0360] The charging component in the energy storage and charging device uses the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to charge the first target electrical device according to the target charging mode through the connection component.

[0361] In some embodiments, the method further includes:

[0362] The first supplementary energy storage unit in the control equipment charging system stores electrical energy when the grid load is less than a preset load threshold, and provides electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the first supplementary energy storage unit is greater than or equal to a first preset supplementary ratio threshold; the first preset supplementary ratio threshold is a positive number greater than 1.

[0363] In some embodiments, controlling a first supplementary energy storage unit in a power device charging system to store electrical energy when the grid load is less than a preset load threshold, and to provide electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold, includes:

[0364] The first supplementary energy storage unit stores electrical energy in the target supplementary battery pack based on the balance of battery performance parameters when the grid load is less than a preset load threshold, and uses the electrical energy stored in the target supplementary battery pack to provide power to at least one energy storage and charging device when the grid load is not less than the preset load threshold; wherein, the target supplementary battery pack is a battery pack among multiple supplementary battery packs in the first supplementary energy storage unit.

[0365] In some embodiments, the method further includes:

[0366] The second supplementary energy storage unit in the control equipment charging system stores electrical energy when the grid load is less than a preset load threshold, and provides electrical energy to at least one energy storage and charging device when the grid load is not less than the preset load threshold and the remaining electrical energy of the first supplementary energy storage unit is less than a preset energy threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the second supplementary energy storage unit is less than or equal to a second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0367] In some embodiments, the method further includes:

[0368] The power generation unit in the control equipment charging system provides power to at least one energy storage device when the grid load is not less than a preset load threshold.

[0369] In some embodiments, the method further includes:

[0370] When it is detected that any AC charging device in the electrical equipment charging system is connected to a second target electrical device, and the load of the power grid is less than a preset load threshold, the AC charging device is controlled to use the power provided by the power grid to charge the second target electrical device connected to the AC charging device.

[0371] In some embodiments, the method further includes:

[0372] When the load on the power grid is not less than a preset load threshold, the AC charging device is controlled to use the electrical energy provided by at least one energy storage device or a first supplementary energy storage unit to charge the second target electrical device connected to the AC charging device.

[0373] The monitoring device in this application embodiment can be used to implement the technical solution in the above-mentioned electrical equipment charging system embodiment of this application. Its implementation principle and technical effect are similar, and will not be repeated here.

[0374] In some embodiments, FIG14 is a schematic flowchart of a power control method provided in some embodiments of this application. The power control method of this application can be applied to the energy storage components in the above-described energy storage and charging device embodiments of this application. As shown in FIG14, the method of this application embodiment may include the following steps:

[0375] Step S1401: The energy storage component sends its electrical energy storage information to the control component of the energy storage and charging equipment.

[0376] For example, energy storage information may include, but is not limited to, at least one of the following: rated energy, remaining capacity, and number of charge / discharge cycles (or cycle life).

[0377] In this step, the energy storage component can send its energy storage information to the control component of the charging device, so that the control component can determine the charging parameters of the target electrical device based on the energy storage information and the power demand of the target electrical device. These charging parameters may include, but are not limited to, charging voltage and / or charging current.

[0378] Step S1402: In response to the opening of the discharge path, the energy storage component outputs target electrical energy to the charging component of the energy storage and charging device using the electrical energy stored in the first energy storage unit in the energy storage component. The target electrical energy is used by the charging component to charge the target electrical device through the connection component of the energy storage and charging device according to the target charging mode.

[0379] Wherein, the ratio between the rated energy of the first energy storage unit and the maximum charge / discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1.

[0380] For example, the energy storage component in this application embodiment can be connected to the charging component through a discharge path, so that when the control component controls the discharge path to be in a conducting state, the energy storage component can output the target electrical energy to the charging component. It should be understood that when the control component controls the discharge path to be in a closed state, the energy storage component cannot output the target electrical energy to the charging component.

[0381] In this step, the energy storage component can, in response to the opening of the discharge path, use the electrical energy stored in the first energy storage unit in the energy storage component to output target electrical energy to the charging component of the charging device, so that the charging component can use the target electrical energy to charge the target electrical device according to the target charging mode through the connection component of the charging device. For example, the control component can control the charging component to charge the target electrical device with reference to the above charging parameters.

[0382] It should be understood that there is no need to set up a discharge path between the energy storage component and the charging component. The control component can control whether the energy storage component outputs the target electrical energy to the charging component through the program, or it can also control whether the energy storage component outputs the target electrical energy to the charging component through other means.

[0383] It should be noted that the possible ways in which the charging component uses the electrical energy stored in the energy storage component to charge the target electrical device can be referred to the relevant content in the above-mentioned energy storage and charging device embodiments of this application, and will not be repeated here.

[0384] In summary, in this embodiment, the energy storage component sends its energy storage information to the control component of the charging device. Furthermore, in response to the opening of the discharge path, the energy storage component uses the energy stored in the first energy storage unit to output target energy to the charging component of the charging device, so that the charging component can use the target energy to charge the target device according to the target charging mode through the connection component of the charging device. Therefore, in this embodiment, the charging component can charge the target device using the target energy output from the first energy storage unit, without directly using the grid's power. This alleviates the demand on the grid and reduces the pressure on the transformer connected to the grid. Thus, this embodiment eliminates the need to add or expand the transformer, saving on the cost of adding the charging device. In addition, by ensuring that the ratio between the rated energy of the first energy storage unit and the maximum charge / discharge power of the first energy storage unit is greater than or equal to the first preset ratio threshold (i.e., the rated energy of the first energy storage unit is greater than the maximum charge / discharge power), it is beneficial to reduce the charge / discharge rate of the first energy storage unit, so that the energy storage module does not need to be equipped with a thermal management system corresponding to the first energy storage unit, thereby saving the cost of the energy storage module.

[0385] In some embodiments, the maximum charge / discharge power of the first energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode.

[0386] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can output target electrical energy to the charging component of the energy storage device at a first discharge rate not greater than a first preset discharge rate threshold; the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode.

[0387] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can output target electrical energy to the charging component of the energy storage device at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate.

[0388] In some embodiments, the energy storage component further includes a second energy storage unit, wherein the charge / discharge rate of the second energy storage unit is greater than the charge / discharge rate of the first energy storage unit;

[0389] In response to the opening of the discharge path, the energy storage component can also use the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to output target electrical energy to the charging component of the charging device; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than a first preset ratio threshold.

[0390] In some embodiments, the second energy storage unit satisfies one or more of the following conditions:

[0391] The ratio between the rated energy of the second energy storage unit and the maximum discharge power of the second energy storage unit shall not exceed 1:3;

[0392] The energy density of the second energy storage unit is greater than or equal to 380 Wh / L;

[0393] The ratio between the rated energy of the second energy storage unit and the maximum charging power of the charging component is less than 1:4.

[0394] In some embodiments, any energy storage unit in the energy storage assembly includes multiple battery packs, and the rated energy of the energy storage unit includes the sum of the rated energies of the multiple battery packs.

[0395] The rated energy (or rated energy storage energy, or rated energy storage energy) of any energy storage unit involved in the embodiments of this application can refer to the total electrical energy that the energy storage unit can provide to an external system after being fully charged. Correspondingly, the rated energy of any battery pack involved in the embodiments of this application refers to the total electrical energy that the battery pack can provide to an external system after being fully charged.

[0396] It should be understood that the rated energy of an energy storage component may include the sum of the rated energy of each energy storage unit.

[0397] The energy storage components in this application embodiment can be used to implement the relevant technical solutions of the energy storage components in the above-mentioned energy storage and charging equipment embodiments of this application. Their implementation principles and technical effects are similar, and will not be repeated here.

[0398] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0399] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A storage and charging device, wherein, The energy storage and charging device includes: an energy storage component, a charging component, and a connection component, wherein the connection component is connected to the energy storage component through the charging component; The charging component can, when the target electrical device is connected to the connection component, use the electrical energy stored in the first energy storage unit in the energy storage component to charge the target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1. According to claim 1, the storage and charging device, wherein, The maximum charge / discharge power of the first energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode. According to claim 1, the storage and charging device, wherein, When the target charging mode is the first charging mode, the first energy storage unit can charge the target electrical device through the connection component at a first discharge rate not greater than a first preset discharge rate threshold; the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode. According to claim 3, the storage and charging device, wherein, When the target charging mode is the second charging mode, the first energy storage unit can charge the target electrical device through the connection component at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate. The storage and charging device according to any one of claims 1-4, wherein, The first energy storage unit can store electrical energy when the load on the power grid is less than a preset load threshold. The storage and charging device according to any one of claims 1-5, wherein, The energy storage component further includes a second energy storage unit, wherein the charge / discharge rate of the second energy storage unit is greater than that of the first energy storage unit; The second energy storage unit can store electrical energy when the grid load is less than a preset load threshold; The charging component can also, when the connection component is connected to a target electrical device, use the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold. The storage and charging device according to any one of claims 1-6, wherein, The energy storage component is connected to the DC bus; Specifically, the energy storage component can store electrical energy provided by the DC bus when the load on the power grid is less than a preset load threshold, and output electrical energy to the DC bus when preset discharge conditions are met. According to claim 7, the storage and charging device, wherein, The charging component is connected to the DC bus; The charging component can also, when the target electrical device is connected to the connection component, use the power provided by the DC bus to charge the target electrical device according to the target charging mode through the connection component. The storage and charging device according to claim 7 or 8, wherein, The connection component is also connected to the DC bus; The connection component can also transmit electrical energy from the target electrical equipment to the DC bus. The storage and charging device according to any one of claims 1-9, wherein, The energy storage and charging device also includes a control component connected to the energy storage component and the charging component; The control component can control the charging component to use the electrical energy stored in the energy storage component to charge the target electrical device through the connection component according to the target charging mode. A charging system for electrical equipment, wherein, The electrical equipment charging system includes a plurality of storage and charging devices as described in any one of claims 1-10; The charging component in any of the aforementioned energy storage and charging devices can, when a first target electrical device is connected to the connecting component in the energy storage and charging device, use the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the first target electrical device according to the target charging mode through the connecting component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1. According to claim 11, the electrical equipment charging system, wherein, The maximum charge / discharge power of the first energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode. According to claim 11, the electrical equipment charging system, wherein, When the target charging mode is the first charging mode, the first energy storage unit can charge the first target electrical device through the connection component at a first discharge rate not greater than a first preset discharge rate threshold; the first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode. According to claim 13, the electrical equipment charging system, wherein, When the target charging mode is the second charging mode, the first energy storage unit can charge the first target electrical device through the connection component at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate. The electrical equipment charging system according to any one of claims 11-14, wherein, The first energy storage unit in each of the aforementioned energy storage and charging devices can store electrical energy when the load on the power grid is less than a preset load threshold. The electrical equipment charging system according to any one of claims 11-15, wherein, The energy storage component in the energy storage and charging device also includes a second energy storage unit that can store electrical energy when the load on the power grid is less than a preset load threshold, wherein the charge-discharge rate of the second energy storage unit is greater than the charge-discharge rate of the first energy storage unit. Specifically, when a first target electrical device is connected to the connection component in the energy storage and charging device, the charging component can utilize the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage and charging device to charge the first target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold. The electrical equipment charging system according to any one of claims 11-16, wherein, The electrical equipment charging system further includes: a first supplementary energy storage unit connected to at least one of the energy storage devices; The first supplementary energy storage unit can store electrical energy when the load on the power grid is less than a preset load threshold, and provide electrical energy to at least one of the energy storage and charging devices when the load on the power grid is not less than the preset load threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the first supplementary energy storage unit is greater than or equal to a first preset supplementary ratio threshold; the first preset supplementary ratio threshold is a positive number greater than 1. According to claim 17, the electrical equipment charging system, wherein, The rated energy of the first supplementary energy storage unit is related to the total input power and total rated energy of each of the aforementioned energy storage devices. The electrical equipment charging system according to claim 17 or 18, wherein, The maximum charge / discharge power of the first supplementary energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode. The electrical equipment charging system according to any one of claims 17-19, wherein, The electrical equipment charging system further includes: a second supplementary energy storage unit connected to at least one of the energy storage devices; The second supplementary energy storage unit can store electrical energy when the load of the power grid is less than the preset load threshold, and provide electrical energy to at least one of the energy storage and charging devices when the load of the power grid is not less than the preset load threshold and the remaining electrical energy of the first supplementary energy storage unit is less than the preset electrical energy threshold; wherein, the ratio between the rated energy and the maximum charging and discharging power of the second supplementary energy storage unit is less than or equal to a second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold. The electrical equipment charging system according to any one of claims 11-20, wherein, The electrical equipment charging system further includes: a power generation unit connected to at least one of the energy storage devices; The power generation unit can provide power to at least one of the energy storage and charging devices when the load on the power grid is not less than a preset load threshold. The electrical equipment charging system according to any one of claims 17-21, wherein, The electrical equipment charging system also includes: multiple AC charging devices; The AC charging device can charge the second target electrical device connected to the AC charging device using the electrical energy provided by the power grid when the second target electrical device is connected and the load of the power grid is less than the preset load threshold. According to claim 22, the electrical equipment charging system, wherein, The AC charging device can also charge a second target electrical device connected to the AC charging device using electrical energy provided by at least one of the energy storage devices or the first supplementary energy storage unit, provided that the load of the power grid is not less than the preset load threshold. The electrical equipment charging system according to any one of claims 11-23, wherein, Each of the aforementioned energy storage and charging devices is connected to the DC bus. The electrical equipment charging system according to any one of claims 11-24, wherein, The electrical equipment charging system also includes: a monitoring device connected to each of the energy storage devices; The monitoring device can control the charging component in any of the energy storage devices. When a first target electrical device is connected to the connection component in the energy storage device, the device can use the electrical energy stored in the energy storage component to charge the first target electrical device according to the target charging mode through the connection component. A method for controlling the electrical energy of a power storage and charging device, wherein, The storage and charging device is the storage and charging device as described in any one of claims 1-10, and the method includes: When a target electrical device is connected to the connection component in the energy storage and charging device, the charging component uses the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1. The method according to claim 26, wherein, The method further includes: The first energy storage unit stores electrical energy when the load on the power grid is less than a preset load threshold. The method according to claim 26 or 27, wherein, The method further includes: The second energy storage unit in the energy storage and charging device stores electrical energy when the load on the power grid is less than a preset load threshold. When the target electrical device is connected to the connection component, the charging component uses the electrical energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device according to the target charging mode through the connection component; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold. A power control method for a charging system for electrical equipment, wherein, The electrical equipment charging system is the electrical equipment charging system as described in any one of claims 11-25, and the method includes: When it is detected that a first target electrical device is connected to a connection component in any energy storage and charging device, the charging component in the energy storage and charging device is controlled to use the electrical energy stored in the first energy storage unit in the energy storage and charging device to charge the first target electrical device through the connection component according to the target charging mode; wherein, the ratio between the rated energy of the first energy storage unit and the maximum charging and discharging power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1. The method according to claim 29, wherein, The method further includes: When the load on the power grid is detected to be less than a preset load threshold, the first energy storage unit of each of the energy storage and charging devices is controlled to store electrical energy. The method according to claim 29 or 30, wherein, The method further includes: The charging component in the energy storage and charging device uses the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to charge the first target electrical device according to the target charging mode through the connection component. The method according to any one of claims 29-31, wherein, The method further includes: The system controls a first supplementary energy storage unit in the electrical equipment charging system to store electrical energy when the load on the power grid is less than a preset load threshold, and to provide electrical energy to at least one of the charging and storage devices when the load on the power grid is not less than the preset load threshold; wherein the ratio between the rated energy and the maximum charging and discharging power of the first supplementary energy storage unit is greater than or equal to a first preset supplementary ratio threshold; the first preset supplementary ratio threshold is a positive number greater than 1. The method according to claim 32, wherein, The method further includes: The system controls a second supplementary energy storage unit in the charging system of the electrical equipment to store electrical energy when the load of the power grid is less than the preset load threshold, and to provide electrical energy to at least one of the charging and storage devices when the load of the power grid is not less than the preset load threshold and the remaining electrical energy of the first supplementary energy storage unit is less than the preset electrical energy threshold; wherein the ratio between the rated energy and the maximum charging and discharging power of the second supplementary energy storage unit is less than or equal to a second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold. The method according to any one of claims 29-33, wherein, The method further includes: The power generation unit in the charging system of the electrical equipment is controlled to provide power to at least one of the energy storage and charging devices when the load on the power grid is not less than a preset load threshold. The method according to any one of claims 32-34, wherein, The method further includes: When it is detected that any AC charging device in the electrical equipment charging system is connected to a second target electrical device, and the load of the power grid is less than a preset load threshold, the AC charging device is controlled to use the power provided by the power grid to charge the second target electrical device connected to the AC charging device. The method according to claim 35, wherein, The method further includes: When the load on the power grid is not less than the preset load threshold, the AC charging device is controlled to use the electrical energy provided by at least one of the energy storage devices or the first supplementary energy storage unit to charge the second target electrical device connected to the AC charging device. An electrical energy control method, wherein, The method is applied to an energy storage component in a storage and charging device as described in any one of claims 1-10, and the method includes: The energy storage component sends its electrical energy storage information to the control component of the energy storage and charging device; In response to the opening of the discharge path, the energy storage component uses the electrical energy stored in the first energy storage unit in the energy storage component to output target electrical energy to the charging component of the charging device, wherein the target electrical energy is used by the charging component to charge the target electrical device through the connection component of the charging device according to the target charging mode; Wherein, the ratio between the rated energy of the first energy storage unit and the maximum charge / discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold; the first preset ratio threshold is a positive number greater than 1. The method according to claim 37, wherein, The maximum charge / discharge power of the first energy storage unit is greater than or equal to the maximum preset charge / discharge power corresponding to the target charging mode. The method according to claim 37, wherein, When the target charging mode is the first charging mode, the first energy storage unit can output the target electrical energy to the charging component of the energy storage device at a first discharge rate not greater than the first preset discharge rate threshold. The first preset discharge rate threshold is the maximum preset discharge rate corresponding to the first charging mode. The method according to claim 39, wherein, When the target charging mode is the second charging mode, the first energy storage unit can output target electrical energy to the charging component of the energy storage device at a second discharge rate not greater than the second preset discharge rate threshold; wherein, the second preset discharge rate threshold is the maximum preset discharge rate corresponding to the second charging mode, the first preset discharge rate threshold is greater than the second preset discharge rate threshold, and the first discharge rate is greater than the second discharge rate. The method according to any one of claims 37-40, wherein, The energy storage component further includes a second energy storage unit, wherein the charge / discharge rate of the second energy storage unit is greater than that of the first energy storage unit; In response to the opening of the discharge path, the energy storage component can also use the electrical energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to output the target electrical energy to the charging component of the charging device; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charging and discharging power of the second energy storage unit is less than or equal to a second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold. The method according to claim 41, wherein, The second energy storage unit satisfies one or more of the following conditions: The ratio between the rated energy of the second energy storage unit and the maximum discharge power of the second energy storage unit is no greater than 1:3; The energy density of the second energy storage unit is greater than or equal to 380 Wh / L; The ratio between the rated energy of the second energy storage unit and the maximum charging power of the charging component is less than 1:4.

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