Storage and charging equipment, power consumption equipment charging system and power control method

Abstract

This application relates to a power storage and charging device, a charging system for electrical equipment, and a power control method. The power storage and charging device may include: an energy storage component, a charging component, and a connecting component. The connecting component is connected to the energy storage component through the charging component. The charging component, when a target electrical equipment is connected to the connecting component, utilizes the electrical energy stored in a first energy storage unit in the energy storage component to charge the target electrical equipment according to a target charging mode via the connecting component. The ratio between the rated energy of the first energy storage unit and the maximum charging / 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 embodiments of this application do not require the addition of a transformer or the expansion of the transformer capacity, thereby saving on the cost of adding the power storage and charging device.

Description

Technical Field

[0001] The present application relates to the field of charging and discharging technology, and in particular to a charging storage device, a charging system for electrical equipment, and an electric energy control method. Background Art

[0002] As electric vehicles are used more and more widely, the current number of charging piles can no longer meet the charging needs of vehicles, and more and more charging piles need to be added.

[0003] In the related art, charging piles are usually connected to the power grid through transformers. However, when more and more charging piles are connected to the power grid, it is necessary to add transformers or expand the capacity of transformers, which leads to high cost of adding charging piles. Summary of the invention

[0004] In view of the above problems, the present application provides a storage and charging device, an electrical equipment charging system and an electric energy control method, which can solve the problem of high cost of adding charging piles in related technologies.

[0005] In a first aspect, an embodiment of the present application provides a storage and charging device, the storage and charging device comprising: 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;

[0006] The charging component can charge the target electrical device according to the target charging mode through the connecting component using the electric energy stored in the first energy storage unit in the energy storage component when the connecting component is connected to the target electrical device; wherein the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; and the first preset ratio threshold value is a positive number greater than 1.

[0007] In the embodiment of the present application, the charging component in the storage and charging device can charge the target power-consuming device by using the electric energy stored in the first energy storage unit in the energy storage component, without directly using the electric energy of the power grid to charge the target power-consuming device, which can alleviate the power demand for the power grid, thereby alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not need to add a transformer, and does not need to expand the capacity of the transformer, which is conducive to saving the additional cost of the storage and charging device. In addition, by the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit being greater than or equal to the first preset ratio threshold (that is, the rated energy of the first energy storage unit is greater than the maximum charge and discharge power), on the one hand, it is conducive to reducing the charge and discharge rate of the first energy storage unit, so that the storage and charging device does not need to set up a thermal management system corresponding to the first energy storage unit, thereby further saving the additional cost of the storage and charging device. On the other hand, it is conducive to increasing the charge and discharge power of the first energy storage unit, so that the charge and discharge power of the first energy storage unit can meet the charging demand of the power-consuming device.

[0008] In some embodiments, the maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode, which is conducive to ensuring that the charge and discharge power of the first energy storage unit can meet the charging requirements of the target electrical equipment according to the target charging mode.

[0009] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can charge the target electrical equipment through the connecting 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.

[0010] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can charge the target electrical equipment through the connecting component at a second discharge rate not greater than a 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.

[0011] In some embodiments, the first energy storage unit can store electrical energy when the load of the power grid is less than a preset load threshold.

[0012] In the embodiment of the present application, the method of storing electric energy in the first energy storage unit when the load of the power grid is less than a preset load threshold will not only not affect the power grid supplying power to the basic load equipment through the transformer, but also can fully and reasonably utilize the remaining electric energy in the existing transformer capacity, so that the charging component can use the electric energy stored in the first energy storage unit to charge the target power device when the connecting component is connected to the target power device, without directly using the electric energy of the power grid to charge the target power device, which can relieve the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not require the addition of a transformer, and does not require the expansion of the transformer, which is conducive to saving the cost of adding storage and charging equipment.

[0013] In some embodiments, the first energy storage unit includes a plurality of battery packs, wherein different battery packs have different battery performance parameters;

[0014] The first energy storage unit may specifically store electric energy for a target battery pack among the multiple batteries according to the balance of battery performance parameters when the load of the power grid is less than a preset load threshold;

[0015] The charging component can specifically charge the target power-consuming device through the connecting component according to the target charging mode by utilizing the electric energy stored in the target battery pack when the connecting component is connected to the target power-consuming device.

[0016] In an embodiment of the present application, by storing electric energy in a target battery pack among multiple batteries according to the balance of battery performance parameters, and using the electric energy stored in the target battery pack to charge a target electrical device, 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.

[0017] In some embodiments, the energy storage assembly further includes a second energy storage unit, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit;

[0018] A second energy storage unit may store electric energy when the load of the power grid is less than a preset load threshold;

[0019] The charging component can also charge the target electrical equipment according to the target charging mode through the connecting component using the electric energy stored in the first energy storage unit and / or the second energy storage unit, when the connecting component is connected to the target electrical equipment; wherein the ratio of the rated energy of the second energy storage unit to the maximum charge and discharge power of the second energy storage unit is less than or equal to the second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold.

[0020] In the embodiment of the present application, when the connecting component is connected to the target electrical device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device. This can improve the flexibility of charging the target electrical device, thereby facilitating improving the power supply stability of the storage and charging device.

[0021] In some embodiments, the charging component can specifically use the electric energy stored in the first energy storage unit to charge the target electrical device according to the target charging mode through the connecting component, and when the remaining electric energy of the first energy storage unit is less than the first preset electric energy threshold, use the electric energy stored in the second energy storage unit to charge the target electrical device according to the target charging mode through the connecting component.

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

[0023] In some embodiments, the energy storage assembly is connected to the DC bus;

[0024] The energy storage component can specifically store the electric energy provided by the DC bus when the load of the power grid is less than a preset load threshold, and output electric energy to the DC bus when the preset discharge conditions are met.

[0025] In the embodiment of the present application, the energy storage component is connected to the DC bus, and can specifically store the electric energy provided by the DC bus when the load of the power grid is less than a preset load threshold, and output electric energy to the DC bus when the preset discharge conditions are met. This is not only conducive to improving the convenience of storing and releasing electric energy of the energy storage component, but also conducive to improving the convenience of electric energy transmission to other devices or components on the DC bus.

[0026] In some embodiments, the charging assembly is connected to the DC bus;

[0027] The charging component can also use the electric energy provided by the DC bus to charge the target electric device through the connecting component according to the target charging mode when the connecting component is connected to the target electric device.

[0028] In the embodiment of the present application, the charging component is connected to the DC bus and, when the connecting component is connected to a target electrical device, can use the electrical energy provided by the DC bus to charge the target electrical device through the connecting component according to a target charging mode, so that the charging component can obtain sufficient electrical energy from the DC bus to charge the target electrical device, thereby helping to improve the charging efficiency of the target electrical device.

[0029] In some embodiments, the connection assembly is also connected to the DC bus;

[0030] The connection components can also transmit the electric energy of the target electrical equipment to the DC bus, which can realize the VtoG function or the VtoESS function, which is beneficial to improving the power supply flexibility of the power grid system.

[0031] In some embodiments, the storage and charging device further includes a control component connected to the energy storage component and the charging component;

[0032] The control component can control the charging component to utilize the electric energy stored in the energy storage component to charge the target electrical equipment according to the target charging mode through the connection component.

[0033] In the embodiment of the present application, the control component can control the charging component to utilize the electric energy stored in the energy storage component, and the connection component can charge the target electrical equipment according to the target charging mode, so that the energy storage component and / or the charging component in the storage and charging device can be better coordinated, which is beneficial to improve the charging efficiency of the storage and charging device for the target electrical equipment.

[0034] In a second aspect, an embodiment of the present application provides a charging system for an electric device, the charging system for an electric device comprising a plurality of storage and charging devices as described in any one of the first aspects above;

[0035] The charging component in any storage and charging device can, when the connecting component in the storage and charging device is connected to the first target electrical device, use the electric energy stored in the first energy storage unit in the storage and charging device to charge the first target electrical device through the connecting component according to the target charging mode; wherein the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; the first preset ratio threshold value is a positive number greater than 1.

[0036] In the embodiment of the present application, the charging component in any storage and charging device can charge the first target power-consuming device by using the electric energy stored in the first energy storage unit in the energy storage component, without directly using the electric energy of the power grid to charge the target power-consuming device, which can alleviate the power demand for the power grid, thereby alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not need to add a transformer, and does not need to expand the capacity of the transformer, which is conducive to saving the additional cost of the storage and charging device. In addition, by the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit being greater than or equal to the first preset ratio threshold (that is, the rated energy of the first energy storage unit is greater than the maximum charge and discharge power), on the one hand, it is conducive to reducing the charge and discharge rate of the first energy storage unit, so that the storage and charging device does not need to set up a thermal management system corresponding to the first energy storage unit, thereby further saving the additional cost of the storage and charging device. On the other hand, it is conducive to increasing the charge and discharge power of the first energy storage unit, so that the charge and discharge power of the first energy storage unit can meet the charging demand of the power-consuming device.

[0037] In some embodiments, the maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

[0038] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can charge the first target electrical equipment through the connecting 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.

[0039] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can charge the first target electrical equipment through the connecting component at a second discharge rate not greater than a 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.

[0040] In some embodiments, the first energy storage unit in each charging and storage device can store electrical energy when the load of the power grid is less than a preset load threshold.

[0041] In some embodiments, the first energy storage unit includes multiple battery packs, wherein different battery packs have different battery performance parameters; the first energy storage unit can specifically store electrical energy in a target battery pack according to the balance of the battery performance parameters when the load of the power grid is less than a preset load threshold; wherein the target battery pack is a battery pack among the multiple battery packs in the first energy storage unit.

[0042] In some embodiments, the charging component in the storage and charging device can use the electrical energy stored in the target battery pack to charge the first target electrical device through the connecting component according to the target charging mode when the connecting component in the storage and charging device is connected to the first target electrical device.

[0043] In some embodiments, the energy storage component in the storage device further includes a second energy storage unit capable of storing electric energy when the load of the power grid is less than a preset load threshold, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit;

[0044] The charging component in the storage and charging device can specifically charge the first target electrical device through the connecting component according to the target charging mode using the electric energy stored in the first energy storage unit and / or the second energy storage unit in the storage and charging device when the connecting component in the storage and charging device is connected to the first target electrical device; wherein the ratio between the rated energy of the second energy storage unit and the maximum charge and discharge power is less than or equal to the second preset ratio threshold value, and the second preset ratio threshold value is less than the first preset ratio threshold value.

[0045] In some embodiments, the electrical device charging system further includes: a first supplementary energy storage unit connected to at least one storage and charging device;

[0046] The first supplementary energy storage unit can store electric energy when the load of the power grid is less than a preset load threshold, and provide electric energy to at least one storage and charging device when the load of the power grid is not less than the preset load threshold; wherein the ratio between the rated energy of the first supplementary energy storage unit and the maximum charging and discharging power 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.

[0047] In some embodiments, the rated energy of the first supplementary energy storage unit is related to the total input power and the total rated energy corresponding to each charging device.

[0048] In some embodiments, the maximum charge and discharge power of the first supplementary energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

[0049] In some embodiments, the first supplementary energy storage unit includes a plurality of supplementary battery packs, wherein different supplementary battery packs have different battery performance parameters;

[0050] The first supplementary energy storage unit can specifically store electric energy for a target supplementary battery pack among multiple supplementary battery packs according to the balance of battery performance parameters when the load of the power grid is less than a preset load threshold, and use the electric energy stored in the target supplementary battery pack to provide electric energy to at least one charging storage device when the load of the power grid is not less than the preset load threshold.

[0051] In the embodiment of the present application, by storing electric energy in a target supplementary battery pack among multiple supplementary batteries according to the balance of battery performance parameters, and using the electric energy stored in the target supplementary battery pack to provide electric energy for the storage and charging equipment, it is possible to save the cost of the charging system of the power-consuming equipment, and it is beneficial not only to improve the power supply stability of the storage and charging equipment, but also to improve the service life of the first supplementary energy storage unit.

[0052] In some embodiments, the electrical device charging system further includes: a second supplementary energy storage unit connected to at least one storage and charging device;

[0053] The second supplementary energy storage unit can store electric energy when the load of the power grid is less than a preset load threshold, and provide electric energy to at least one storage and charging device when the load of the power grid is not less than the preset load threshold and the remaining electric energy of the first supplementary energy storage unit is less than the preset electric energy threshold; wherein the ratio between the rated energy of the second supplementary energy storage unit and the maximum charging and discharging power is less than or equal to the second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0054] In the embodiment of the present application, by providing electrical energy to at least one storage and charging device through the second supplementary energy storage unit and / or the first supplementary energy storage unit, the flexibility of providing electrical energy to the storage and charging device can be improved, which is beneficial to further improve the power supply stability of the storage and charging device.

[0055] In some embodiments, the electrical device charging system further comprises: a power generation unit connected to at least one storage and charging device;

[0056] The power generation unit can provide electrical energy to at least one storage device when the load of the power grid is not less than a preset load threshold.

[0057] In an embodiment of the present application, the charging system for an electrical device may further include: a power generation unit connected to at least one storage and charging device; the power generation unit can provide electrical energy to at least one storage and charging device when the load of the power grid is not less than a preset load threshold, thereby further improving the flexibility of providing electrical energy to the storage and charging device, thereby facilitating further improving the power supply stability of the storage and charging device.

[0058] In some embodiments, the electrical device charging system further includes: a plurality of AC charging devices;

[0059] The AC charging device can use the electric energy provided by the power grid to charge the second target electric device connected to the AC charging device when the second target electric device is connected and the load of the power grid is less than a preset load threshold.

[0060] In the embodiment of the present application, when the AC charging device is connected to the second target power-consuming device and the load of the power grid is less than the preset load threshold, the power grid uses the power provided by the power grid to charge the second target power-consuming device connected to the AC charging device. On the one hand, it will not affect the power grid supplying power to the basic load device through the transformer, and there is no need to add a transformer, and there is no need to expand the transformer, which is conducive to saving the cost of adding storage and charging equipment. On the other hand, it can also fully and reasonably utilize the power surplus in the existing transformer capacity, which is conducive to improving the power utilization rate of the transformer.

[0061] 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 charging device or a first supplementary energy storage unit when the load of the power grid is not less than a preset load threshold.

[0062] In the embodiment of the present application, when the load of the power grid is not less than a preset load threshold, the AC charging device uses the electric energy provided by at least one charging device or the first supplementary energy storage unit to charge the second target power-consuming device connected to the AC charging device. There is no need to directly use the electric energy of the power grid to charge the second target power-consuming device, which can alleviate the electricity demand on the power grid and thus alleviate the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not require the installation of an additional transformer or the expansion of the transformer, which is beneficial to saving the cost of installing additional charging and storage equipment.

[0063] In some embodiments, each storage device is connected to the DC bus respectively.

[0064] In some embodiments, the electrical device charging system further includes: a monitoring device connected to each storage and charging device;

[0065] The monitoring device can control the charging component in any storage and charging device. When the connecting component in the storage and charging device is connected to the first target power-consuming device, it can use the electric energy stored in the energy storage component in the storage and charging device to charge the first target power-consuming device through the connecting component according to the target charging mode.

[0066] In a third aspect, an embodiment of the present application provides a method for controlling electric energy of a storage device, wherein the storage device is a storage device as described in any one of the first aspects above, and the method comprises:

[0067] When the connecting component is connected to the target electrical equipment, the charging component in the storage and charging device uses the electric energy stored in the first energy storage unit in the storage and charging device to charge the target electrical equipment through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the first energy storage unit to the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; the first preset ratio threshold value is a positive number greater than 1.

[0068] In some embodiments, the method further comprises:

[0069] The first energy storage unit stores electric energy when the load of the power grid is less than a preset load threshold.

[0070] In some embodiments, the first energy storage unit stores electric energy when the load of the power grid is less than a preset load threshold, including:

[0071] When the load of the power grid is less than a preset load threshold, the first energy storage unit stores electric energy in a target battery pack according to the balance of battery performance parameters; wherein the target battery pack is a battery pack among the multiple battery packs in the first energy storage unit.

[0072] In some embodiments, when the connecting component is connected to the target electric device, the charging component in the storage device uses the electric energy stored in the first energy storage unit in the storage device to charge the target electric device through the connecting component according to the target charging mode, including:

[0073] When the connecting component is connected to the target power-consuming device, the charging component uses the electric energy stored in the target battery pack to charge the target power-consuming device through the connecting component according to the target charging mode.

[0074] In some embodiments, the method further comprises:

[0075] The second energy storage unit in the storage device stores electric energy when the load of the power grid is less than a preset load threshold;

[0076] When the connecting component is connected to the target electrical device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the second energy storage unit to the maximum charge and discharge power of the second energy storage unit is less than or equal to the second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold.

[0077] In some embodiments, when the connection component is connected to the target electric device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electric device through the connection component according to the target charging mode, including:

[0078] The charging component uses the electric energy stored in the first energy storage unit to charge the target electric device through the connecting component according to the target charging mode, and when the remaining electric energy in the first energy storage unit is less than the first preset electric energy threshold, the electric energy stored in the second energy storage unit is used to charge the target electric device through the connecting component according to the target charging mode.

[0079] In some embodiments, when the connection component is connected to the target electric device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electric device through the connection component according to the target charging mode, including:

[0080] The charging component uses the electric energy stored in the second energy storage unit to charge the target electric device through the connecting component according to the target charging mode, and when the remaining electric energy in the second energy storage unit is less than the second preset electric energy threshold, the electric energy stored in the first energy storage unit is used to charge the target electric device through the connecting component according to the target charging mode.

[0081] In a fourth aspect, an embodiment of the present application provides a method for controlling electric energy of an electric device charging system, wherein the electric device charging system is an electric device charging system as described in any one of the second aspects above, and the method includes:

[0082] When it is detected that the connecting component in any storage and charging device is connected to the first target electrical device, the charging component in the storage and charging device is controlled to use the electric energy stored in the first energy storage unit in the storage and charging device to charge the first target electrical device through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the first energy storage unit to the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; the first preset ratio threshold value is a positive number greater than 1.

[0083] In some embodiments, the method further comprises:

[0084] When it is detected that the load of the power grid is less than a preset load threshold, the first energy storage unit of each charging and storage device is controlled to store electric energy.

[0085] In some embodiments, the method further comprises:

[0086] The charging component in the control storage and charging device utilizes the electric 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 electric device according to the target charging mode through the connection component.

[0087] In some embodiments, the method further comprises:

[0088] The first supplementary energy storage unit in the charging system of the electric equipment is controlled to store electric energy when the load of the power grid is less than a preset load threshold, and to provide electric energy to at least one storage and charging device when the load of the power grid is not less than the preset load threshold; wherein the ratio between the rated energy of the first supplementary energy storage unit and the maximum charge and discharge power 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.

[0089] In some embodiments, controlling a first supplementary energy storage unit in a charging system for an electric device to store electric energy when a load of a power grid is less than a preset load threshold, and providing electric energy to at least one storage and charging device when a load of the power grid is not less than a preset load threshold, comprises:

[0090] Control the first supplementary energy storage unit to store electric energy in a target supplementary battery pack according to the balance of battery performance parameters when the load of the power grid is less than a preset load threshold, and to use the electric energy stored in the target supplementary battery pack to provide electric energy to at least one charging storage device when the load of the power grid is not less than the preset load threshold; wherein the target supplementary battery pack is a battery pack among the multiple supplementary battery packs in the first supplementary energy storage unit.

[0091] In some embodiments, the method further comprises:

[0092] The second supplementary energy storage unit in the charging system of the electric equipment is controlled to store electric energy when the load of the power grid is less than a preset load threshold, and to provide electric energy to at least one storage and charging device when the load of the power grid is not less than the preset load threshold and the remaining electric energy of the first supplementary energy storage unit is less than the preset electric energy threshold; wherein the ratio between the rated energy of the second supplementary energy storage unit and the maximum charging and discharging power is less than or equal to the second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0093] In some embodiments, the method further comprises:

[0094] The power generation unit in the power device charging system is controlled to provide electric energy to at least one storage and charging device when the load of the power grid is not less than a preset load threshold.

[0095] In some embodiments, the method further comprises:

[0096] When it is detected that any AC charging device in the power device charging system is connected to a second target power device and the load of the power grid is less than a preset load threshold, the AC charging device is controlled to use the electric energy provided by the power grid to charge the second target power device connected to the AC charging device.

[0097] In some embodiments, the method further comprises:

[0098] When the load of the power grid is not less than a preset load threshold, the AC charging device is controlled to charge a second target power-consuming device connected to the AC charging device using electric energy provided by at least one charging device or the first supplementary energy storage unit.

[0099] In a fifth aspect, an embodiment of the present application provides an electric energy control method, which is applied to an energy storage component in a storage device as described in any one of the first aspects above, and the method includes:

[0100] The energy storage component sends the electric energy storage information of the energy storage component to the control component of the storage and charging device;

[0101] The energy storage component responds to the conduction of the discharge path by using the electric energy stored in the first energy storage unit in the energy storage component to output the target electric energy to the charging component of the storage and charging device, wherein the target electric energy is used by the charging component to charge the target electric device through the connecting component of the storage and charging device according to the target charging mode;

[0102] Among them, the ratio between the rated energy of the first energy storage unit and the maximum charge and 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.

[0103] In some embodiments, the maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

[0104] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit may output the target electric energy to the charging component of the storage and charging device at a first discharge rate that is 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.

[0105] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit may output the target electric energy to the charging component of the storage and charging device at a second discharge rate that is not greater than a 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.

[0106] In some embodiments, the energy storage assembly further includes a second energy storage unit, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit;

[0107] In response to the conduction of the discharge path, the energy storage component can also use the electric energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to output the target electric energy to the charging component of the storage and charging device; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charge and discharge power of the second energy storage unit is less than or equal to the second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold.

[0108] In some embodiments, the second energy storage unit satisfies one or more of the following conditions:

[0109] The ratio between the rated energy of the second energy storage unit and the maximum discharge power of the second energy storage unit is not greater than 1:3;

[0110] The energy density of the second energy storage unit is greater than or equal to 380 Wh / L;

[0111] 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.

[0112] 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.

[0113] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0114] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0115] Figure 1 A schematic diagram of the structure of a storage and charging device provided in some embodiments of the present application;

[0116] Figure 2 A schematic diagram of the structure of a storage and charging device provided in some other embodiments of the present application;

[0117] Figure 3 A schematic diagram of the structure of a storage and charging device provided in some other embodiments of the present application;

[0118] Figure 4 A schematic diagram of the structure of a storage and charging device provided in some other embodiments of the present application;

[0119] Figure 5A schematic diagram of the structure of a charging system for an electric device provided in some embodiments of the present application;

[0120] Figure 6 A schematic diagram of the structure of a charging system for an electric device provided in some other embodiments of the present application;

[0121] Figure 7 A schematic diagram of the structure of a charging system for an electric device provided in some other embodiments of the present application;

[0122] Figure 8 A schematic diagram of the structure of a charging system for an electric device provided in some other embodiments of the present application;

[0123] Fig. 9 A schematic diagram of the structure of a charging system for an electric device provided in some other embodiments of the present application;

[0124] Fig.10 A schematic diagram of the structure of a charging system for an electric device provided in some other embodiments of the present application;

[0125] Fig.11 A schematic diagram of a cloud architecture provided for an embodiment of the present application;

[0126] Fig.12 A schematic diagram of the structure of a charging system for an electric device provided in some other embodiments of the present application;

[0127] Fig.13 A schematic flow chart of a full-scenario charging control method for an electric device charging system provided in some embodiments of the present application;

[0128] Fig.14 A flowchart of a power control method provided for some embodiments of the present application. DETAILED DESCRIPTION

[0129] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0130] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the term "including" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0131] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0132] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0133] The storage and charging device, the electrical equipment charging system and the electric energy control method provided in the embodiments of the present application can be applied to the charging and discharging application scenarios of electrical equipment; of course, they can also be applied to other scenarios.

[0134] It should be noted that, for the convenience of explanation, the following embodiments are described by taking the electric device of the embodiment of the present application as a vehicle as an example. It should be understood that when the electric device of the embodiment of the present application is other equipment, its implementation principle and technical effect are similar.

[0135] In order to solve the problem of high cost of adding charging piles in the related art, the present application proposes that the charging component in the storage and charging device can charge the target power-consuming device by utilizing the electric energy stored in the first energy storage unit in the energy storage component, without directly utilizing the electric energy of the power grid to charge the target power-consuming device, thereby alleviating the electricity demand for the power grid and thus alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not require the addition of a transformer or the expansion of the transformer, which is beneficial to saving the cost of adding storage and charging equipment.

[0136] In some embodiments, Figure 1 A schematic diagram of the structure of the storage and charging device provided in some embodiments of the present application, such as Figure 1 As shown, the storage and charging device of the embodiment of the present application may include but is not limited to: an energy storage component 10, a charging component 11 and a connection component 12. Among them, 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.

[0137] 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. Exemplarily, the connection component 12 may include but is not limited to: a charging gun or a wireless charging connector.

[0138] The connection component 12 in the embodiment of the present application can be connected to the energy storage component 10 through the charging component 11. Exemplarily, the charging component 11 and the energy storage component 10 can be directly connected, or the charging component 11 and the energy storage component 10 can be indirectly connected. For example, by connecting the charging component 11 to the DC bus and connecting the energy storage component 10 to the DC bus, the charging component 11 and the energy storage component 10 can be indirectly connected through the DC bus.

[0139] The charging component 11 in the embodiment of the present application can charge the target electrical device through the connecting component 12 according to the target charging mode by using the electric energy stored in the first energy storage unit 100 in the energy storage component 10 when the connecting component 12 is connected to the target electrical device.

[0140] The ratio between the rated energy of the first energy storage unit 100 and the maximum charge and discharge power of the first energy storage unit 100 in the energy storage assembly 10 in the embodiment of the present application is greater than or equal to the first preset ratio threshold, wherein the first preset ratio threshold may 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 and discharge power of the first energy storage unit 100 is greater than or equal to (i.e. not less than) 1:0.5.

[0141] For ease of understanding, the charge and discharge rates of the battery are briefly introduced and explained in the embodiments of the present application.

[0142] The charge and discharge rate of a battery refers to the current value required when the battery is charged or discharged to its rated capacity (or rated energy) within a specified time. The charge and discharge rate is equal to the ratio of the charge and discharge current to the rated capacity of the battery.

[0143] From this we can see that, when the charge and discharge current is constant, the larger the rated capacity (or rated energy) of the battery, the smaller the charge and discharge rate of the battery.

[0144] In the embodiment of the present application, by making the ratio between the rated energy of the first energy storage unit 100 and the maximum charge and discharge power of the first energy storage unit 100 greater than or equal to the first preset ratio threshold value (i.e., the rated energy of the first energy storage unit 100 is greater than the maximum charge and discharge power), on the one hand, it is helpful to reduce the charge and discharge rate of the first energy storage unit 100, so that the storage and charging equipment does not need to be provided with a thermal management system corresponding to the first energy storage unit 100, and a natural cooling method can be adopted, thereby saving the cost of the storage and charging equipment. On the other hand, it is helpful to increase the charge and discharge power of the first energy storage unit 100, so that the charge and discharge power of the first energy storage unit 100 can meet the charging requirements of the electrical equipment.

[0145] 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 electric energy stored in the first energy storage unit 100 in the energy storage component 10 to charge the target electric device through the connecting component 12 according to the target charging mode when the connecting component 12 is connected to the target electric device.

[0146] In another possible implementation, when 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 electric energy stored in the first energy storage unit 100 in the energy storage component 10 via the DC bus when the target electric device is connected to the connection component 12, and charge the target electric device via the connection component 12 according to the target charging mode. The first energy storage unit 100 can output electric energy to the DC bus.

[0147] It should be understood that if other storage devices, or other components or other units for storing electrical energy are connected to the DC bus, the charging component 11 can also use the electrical energy stored in other storage devices, other components or other units through the DC bus to charge the target electrical equipment through the connecting component 12 according to the target charging mode.

[0148] Exemplarily, the target charging mode in the embodiment of the present application may refer to a DC charging mode, wherein the target charging mode may include but is not limited to a first charging mode or a second charging mode, wherein the charge and discharge rate of the first charging mode may be greater than the charge and discharge rate of the second charging mode, and the charging speed of the first charging mode is greater than the charging speed of the second charging mode. For example, the first charging mode may be referred to as a super charging mode, and the second charging mode may be referred to as a fast charging mode.

[0149] It can be seen that the storage and charging device in the embodiment of the present application is provided with an energy storage component that can store electric energy, and the charging component can use the electric energy stored in the first energy storage unit in the energy storage component when the connecting component is connected to the target electric device, and charge the target electric device according to the target charging mode through the connecting component. The target electric device can be charged by using the electric energy stored in the first energy storage unit in the energy storage component, without directly using the electric energy of the power grid to charge the target electric device, which can alleviate the electricity demand for the power grid and thus alleviate the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not require the addition of a transformer or the expansion of the transformer, which is beneficial to saving the cost of adding storage and charging equipment.

[0150] In summary, in the embodiment of the present application, the storage and charging equipment may include: an energy storage component, a charging component and a connecting component, wherein the connecting component is connected to the energy storage component through the charging component; the charging component can, when the connecting component is connected to the target power-consuming device, use the electric energy stored in the first energy storage unit in the energy storage component to charge the target power-consuming device through the connecting component according to the target charging mode. It can be seen that the charging component in the embodiment of the present application can charge the target power-consuming device by using the electric energy stored in the first energy storage unit in the energy storage component, without directly using the electric energy of the power grid to charge the target power-consuming device, which can alleviate the power demand for the power grid, thereby alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not need to add a transformer, and does not need to expand the capacity of the transformer, which is conducive to saving the cost of adding storage and charging equipment. In addition, by making the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit 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 and discharge power), on the one hand, it is helpful to reduce the charge and discharge ratio of the first energy storage unit, so that the storage and charging equipment does not need to be provided with a thermal management system corresponding to the first energy storage unit, thereby further saving the additional cost of the storage and charging equipment. On the other hand, it is helpful to increase the charge and discharge power of the first energy storage unit, so that the charge and discharge power of the first energy storage unit can meet the charging needs of the electrical equipment.

[0151] In some embodiments, the maximum charge and discharge power of the first energy storage unit 100 of the embodiment of the present application may be greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode, which is beneficial for the charge and discharge power of the first energy storage unit 100 to meet the charging requirements of the target electrical equipment according to the target charging mode.

[0152] For example, when the target charging mode is the first charging mode, the maximum preset charging and discharging power may be greater than or equal to 360 kW. For another example, when the target charging mode is the second charging mode, the maximum preset charging and discharging power may be greater than or equal to 50 kW.

[0153] In some embodiments, when the target charging mode is the 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 that is 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. Exemplarily, the first preset discharge rate threshold may be greater than or equal to 4C. For example, the first discharge rate may include but is not limited to 4C.

[0154] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit 100 can charge the target electrical equipment through the connecting component 12 at a second discharge rate that is 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 may be greater than the second preset discharge rate threshold, and the first discharge rate may be greater than the second discharge rate.

[0155] Exemplarily, the second preset discharge rate threshold may be greater than or equal to 1 C and less than 4 C. For example, the second discharge rate may include but is not limited to 2C or 3C.

[0156] It can be seen that the first energy storage unit 100 in the embodiment of the present application can charge the target electrical equipment according to different discharge rates according to different target charging modes, which can improve the charging flexibility and is conducive to adapting to electrical equipment of different specifications.

[0157] In some embodiments, the first energy storage unit 100 of the embodiment of the present application can store electric energy when the load of the power grid is less than a preset load threshold, so that the charging component 11 can charge the target power device using the electric energy stored in the first energy storage unit 100 when the connecting component 12 is connected to the target power device. The preset load threshold refers to the load boundary value corresponding to whether the load of the power grid is a light load or a heavy load. For example, if the load of the power grid is less than the preset load threshold, it can be determined that the load of the power grid is a light load (or that there is surplus electric energy in the capacity of the transformer connected to the power grid); if the load of the power grid is not less than the preset load threshold, it can be determined that the load of the power grid is a heavy load (or that there is insufficient electric energy in the capacity of the transformer connected to the power grid).

[0158] Exemplarily, the first energy storage unit 100 can determine that the load of 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 rated power of the transformer and a preset coefficient, thereby storing electric energy. The preset coefficient can be a coefficient less than 0-1, for example, 0.7.

[0159] Of course, whether the load of the power grid is less than the preset load threshold may also be determined in other ways.

[0160] It should be understood that the way in which the first energy storage unit 100 stores electric energy when the load of the power grid is less than the preset load threshold does not affect the power grid supplying power to the basic load equipment through the transformer, and can also fully and reasonably utilize the remaining electric energy 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.

[0161] Furthermore, in order to save electricity costs, the first energy storage unit 100 can store electricity when the load of the power grid is less than a preset load threshold and the power grid is currently in a valley period, so as to save the cost of electricity storage.

[0162] It can be seen that in the embodiment of the present application, the method of storing electric energy by the first energy storage unit 100 when the load of the power grid is less than the preset load threshold will not only not affect the power grid supplying power to the basic load equipment through the transformer, but also can fully and reasonably utilize the remaining electric energy in the existing transformer capacity, so that the charging component 11 can use the electric energy stored in the first energy storage unit 100 to charge the target power device when the connecting component 12 is connected to the target power device, without directly using the electric energy of the power grid to charge the target power device, which can relieve the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not need to add a transformer, and does not need to expand the capacity of the transformer, which is conducive to saving the cost of adding storage and charging equipment.

[0163] In some embodiments, the embodiments of the present application further exemplarily introduce and illustrate the relevant contents of the first energy storage unit. The first energy storage unit 100 of the embodiments of the present application may include but is not limited to multiple battery packs, wherein different battery packs have different battery performance parameters. Exemplarily, the battery performance parameters may include but are not limited to battery life parameters and / or battery remaining power (State of Charge, SOC).

[0164] For example, the battery pack in the first energy storage unit 100 in the embodiment of the present application may include but is not limited to a second-use battery pack. A second-use battery pack refers to a waste power lithium battery pack (such as a retired battery pack of a passenger car or commercial vehicle, etc.) or battery cell that has been disassembled, tested, and screened and then reassembled into a healthy battery pack or system to achieve resource reuse.

[0165] The first energy storage unit 100 in the embodiment of the present application can specifically store electric energy for a target battery pack among multiple batteries according to the balance of battery performance parameters when the load of the power grid is less than a preset load threshold.

[0166] Exemplarily, when the load of the power grid is less than a preset load threshold, the first energy storage unit 100 can determine a target battery pack from multiple batteries according to the balance of battery performance parameters, and store electric energy in the target battery pack. It should be noted that the target battery pack is a general term, which can refer to one or more target battery packs.

[0167] It should be understood that in the embodiment of the present application, the target battery pack in the first energy storage unit 100 may be preferentially stored with electric energy. When the target battery pack is stored with electric energy and there is still electric energy available for charging the storage and charging device, other battery packs in the first energy storage unit 100 may also be stored with electric energy according to the balance of battery performance parameters, and so on, until there is no electric energy available for charging the storage and charging device or all battery packs in the first energy storage unit 100 have completed electric energy storage.

[0168] The charging component 11 in the embodiment of the present application can specifically use the electric energy stored in the target battery pack to charge the target electric device through the connecting component 12 according to the target charging mode when the connecting component 12 is connected to the target electric device.

[0169] In summary, in the embodiment of the present application, the first energy storage unit can store electric energy for a target battery pack among multiple batteries according to the balance of battery performance parameters when the load of the power grid is less than a preset load threshold; further, the charging component can use the electric energy stored in the target battery pack to charge the target electric device through the connecting component according to the target charging mode when the connecting component is connected to the target electric device. It can be seen that in the embodiment of the present application, by storing electric energy for a target battery pack among multiple batteries according to the balance of battery performance parameters and charging the target electric device with the electric energy stored in the target battery pack, it is possible to save the cost of setting up additional storage and charging equipment and also help to increase the service life of the first energy storage unit.

[0170] In some embodiments, Figure 2 The schematic diagram of the structure of the storage and charging device provided in some other embodiments of the present application is as follows: Figure 2 As shown, in order to further increase the rated energy of the storage device, the energy storage component 10 of the embodiment of the present application may also 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.

[0171] In the embodiment of the present application, the ratio between the rated energy of the second energy storage unit 101 and the maximum charge and discharge power of the second energy storage unit 101 is less than or equal to the second preset ratio threshold, wherein the second preset ratio threshold is less than the first preset ratio threshold. For example, the ratio between the rated energy of the second energy storage unit 101 and the maximum charge and discharge power of the second energy storage unit 101 is less than or equal to (i.e., not greater than) 1:3.

[0172] The second energy storage unit 101 in the embodiment of the present application can store electric energy when the load of the power grid is less than a preset load threshold. Exemplarily, the second energy storage unit 101 can store electric energy separately with the first energy storage unit 100 when the load of the power grid is less than the preset load threshold. In another exemplary embodiment, the second energy storage unit 101 can store electric energy when the load of the power grid is less than the preset load threshold and the first energy storage unit 100 completes electric energy storage.

[0173] Furthermore, in order to save electricity costs, the second energy storage unit 101 can store electricity when the load of the power grid is less than a preset load threshold and the power grid is currently in a valley period, so as to save the cost of electricity storage.

[0174] The charging component 11 in the embodiment of the present application can also use the electric energy stored in the first energy storage unit 100 and / or the second energy storage unit 101 to charge the target electric device through the connecting component 12 according to the target charging mode when the connecting component 12 is connected to the target electric device.

[0175] In one possible implementation, the charging component 11 can specifically use the electric energy stored in the first energy storage unit 100 to charge the target electrical device according to the target charging mode through the connecting component 12, and when the remaining electric energy of the first energy storage unit 100 is less than the first preset electric energy threshold, use the electric energy stored in the second energy storage unit 101 to charge the target electrical device according to the target charging mode through the connecting component 12.

[0176] In this implementation, the charging component 11 preferentially utilizes the electric energy stored in the first energy storage unit 100 to charge the target electric device, and when the remaining electric energy in the first energy storage unit 100 is insufficient, the electric energy stored in the second energy storage unit 101 is utilized to charge the target electric device. Since the first energy storage unit 100 can adopt natural cooling, the electric energy stored in the first energy storage unit 100 is preferentially utilized for charging, which is beneficial to saving thermal management costs.

[0177] In another possible implementation, the charging component 11 can specifically use the electric energy stored in the second energy storage unit 101 to charge the target electrical device according to the target charging mode through the connecting component 12, and when the remaining electric energy of the second energy storage unit 101 is less than the second preset electric energy threshold, the electric 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 connecting component 12.

[0178] In this implementation, the charging component 11 preferentially utilizes the electric energy stored in the second energy storage unit 101 to charge the target electric device, and when the remaining electric energy in the second energy storage unit 101 is insufficient, the electric energy stored in the first energy storage unit 100 is utilized to charge the target electric device. Since the charge and discharge rate of the second energy storage unit is greater than that of the first energy storage unit, the electric energy stored in the second energy storage unit is preferentially utilized for charging, which is beneficial to improving the charging speed.

[0179] In another possible implementation, the charging component 11 can specifically utilize the electric energy stored in the first energy storage unit 100 and the second energy storage unit 101 to charge the target electric device according to the target charging mode through the connecting component 12.

[0180] In summary, in the embodiment of the present application, the energy storage component also includes a second energy storage unit with a charge-discharge ratio greater than that of the first energy storage unit; the second energy storage unit can store electric energy when the load of the power grid is less than a preset load threshold; further, the charging component can also charge the target electric device through the connecting component according to the target charging mode using the electric energy stored in the first energy storage unit and / or the second energy storage unit when the connecting component is connected to the target electric device. It can be seen that in the embodiment of the present application, the charging component can improve the flexibility of charging the target electric device by using the electric energy stored in the first energy storage unit and / or the second energy storage unit when the connecting component is connected to the target electric device, which is beneficial to improve the power supply stability of the storage and charging device.

[0181] In some embodiments, Figure 3 The schematic diagram of the structure of the storage and charging device provided in some other embodiments of the present application is as follows: Figure 3 As shown, the energy storage assembly 10 in the embodiment of the present application can be connected to the DC bus B DC The energy storage component 10 can specifically store the DC bus B when the load of the power grid is less than a preset load threshold. DC The power provided, and the power supplied to DC bus B when the preset discharge conditions are met DC Output electrical energy.

[0182] For example, the power grid can be connected to the DC bus B through a transformer and a bidirectional AC / DC DC Connection, wherein the bidirectional AC / DC is used to perform AC / DC conversion processing on electrical energy.

[0183] For example, the energy storage component 10 can be connected to the DC bus B through a first charging and discharging path that can switch the on and off state. DC When the first charging and discharging path is in the on state, the energy storage component 10 is connected to the DC bus B DCWhen the first charging and discharging path is in the disconnected state, the energy storage component 10 and the DC bus B DC Electric energy cannot be transferred between them.

[0184] In the embodiment of the present application, the energy storage unit (such as the first energy storage unit and / or the second energy storage unit) in the energy storage assembly 10 can store the DC bus B when the load of the power grid is less than the preset load threshold. DC Power provided, DC bus B DC The electric energy can come from the grid through the transformer and the bidirectional AC / DC to form a DC bus B DC Provided electrical energy.

[0185] In addition, the energy storage unit (such as the first energy storage unit and / or the second energy storage unit) in the energy storage assembly 10 further discharges the DC bus B when the preset discharge condition is met. DC Output electrical energy to facilitate passing through DC bus B DC The electric energy may be transmitted to the device or component requiring the electric energy. Exemplarily, the preset discharge condition may include but is not limited to receiving a discharge instruction or receiving a discharge request.

[0186] In the embodiment of the present application, the energy storage component is connected to the DC bus, and can specifically store the electric energy provided by the DC bus when the load of the power grid is less than a preset load threshold, and output electric energy to the DC bus when the preset discharge conditions are met. This is not only conducive to improving the convenience of storing and releasing electric energy of the energy storage component, but also conducive to improving the convenience of electric energy transmission to other devices or components on the DC bus.

[0187] In some embodiments, Figure 3 As shown, the charging assembly 11 in the embodiment of the present application can be connected to the DC bus B DC connection so that an indirect connection with the energy storage assembly 10 can be achieved.

[0188] The charging assembly 11 in the embodiment of the present application can also utilize the DC bus B to connect the target power-consuming device to the connecting assembly 12. DC The provided electric energy is used to charge the target electric device according to the target charging mode through the connection component 12.

[0189] It should be understood that the DC bus B DC The electrical energy provided may include but is not limited to any of the following: the energy storage unit in the energy storage assembly 10 supplies the DC bus B with the energy stored in the energy storage unit 10 when the preset discharge conditions are met. DC Output power, DC bus B DC Other storage devices, other components or other units connected to the DC bus B DC Output electrical energy.

[0190] In the embodiment of the present application, the charging component is connected to the DC bus and, when the connecting component is connected to a target electrical device, can use the electrical energy provided by the DC bus to charge the target electrical device through the connecting component according to a target charging mode, so that the charging component can obtain sufficient electrical energy from the DC bus to charge the target electrical device, thereby helping to improve the charging efficiency of the target electrical device.

[0191] In some embodiments, Figure 3 As shown, the connection assembly 12 in the embodiment of the present application can also be connected to the DC bus B DC The connecting component 12 can also transmit the electric energy of the target electrical equipment to the DC bus B. DC , so that the DC bus B DC The electric energy of the target electrical equipment can be transmitted to the power grid or DC bus B DC Other storage devices, other components or other units connected to the vehicle can realize the vehicle to grid (VtoG) function or vehicle to energy storage system (VtoESS) function. Among them, the VtoG function can refer to the vehicle's electric energy charging the grid; the VtoESS function can refer to the vehicle's electric energy charging the storage device or other components.

[0192] It should be understood that in the DC bus B DC When the power voltage provided can meet the power voltage of the target power-consuming equipment, the connecting component 12 can also directly use the DC bus B DC The electric energy provided is used to charge the target electrical equipment.

[0193] For example, the connection component 12 can be connected to the DC bus B through an AC path that can switch the on / off state. DC When the AC path is in the on state, the connection component 12 is connected to the DC bus B. DC When the AC path is disconnected, the connecting component 12 and the DC bus B DC Electric energy cannot be transferred between them.

[0194] It can be seen that in the embodiment of the present application, the connecting component is also connected to the DC bus, and the connecting component can also transmit the electric energy of the target electrical equipment to the DC bus, thereby realizing the VtoG function or the VtoESS function, which is beneficial to improving the power supply flexibility of the power grid system.

[0195] In some embodiments, Figure 4 The schematic diagram of the structure of the storage and charging device provided in some other embodiments of the present application is as follows: Figure 4 As shown, in order for the storage and charging device to better realize linkage control, the storage and charging device of the embodiment of the present application may also 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 the target electric device, it can send an electric device connection signal to the control component 13, so that the control component 13 can know that the connection component 12 is connected to the target electric device according to the electric device connection signal. Among them, the electric 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 electric device.

[0196] The control component 13 in the embodiment of the present application can control the charging component 11 to utilize the electric energy stored in the energy storage component 10 to charge the target electric device according to the target charging mode through the connecting component 12.

[0197] Exemplarily, upon learning that the connection component 12 is connected to a target electrical device, the control component 13 may control the charging component 11 to utilize 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 a target charging mode.

[0198] It should be understood that the control component 13 can also control the energy storage component 10 (eg, the first energy storage unit 100 and / or the second energy storage unit 101 ) to store electric energy when the load of the power grid is less than a preset load threshold.

[0199] It can be seen that in the embodiments of the present application, the storage and charging device may further include a control component connected to the energy storage component and the charging component; the control component may control the charging component to utilize the electric energy stored in the energy storage component to charge the target electrical equipment according to the target charging mode through the connection component, so that the energy storage component and / or the charging component in the storage and charging device may be better coordinated, thereby facilitating improving the charging efficiency of the storage and charging device for the target electrical equipment.

[0200] Of course, the storage and charging device in the embodiment of the present application may also include other components, for example, a communication component for transmitting information with other devices, etc.

[0201] In some embodiments, Figure 5 A schematic diagram of a charging system for an electric device provided in some embodiments of the present application, such as Figure 5 As shown, the electric device charging system of the embodiment of the present application may include multiple storage and charging devices E sc ; Among them, storage and charging equipment E sc The specific structure can refer to the relevant content in the above storage and charging device embodiment of this application, which will not be repeated here.

[0202] Each storage and charging device E in the embodiment of the present application sc The power grid can be connected to each storage device through a transformer and a bidirectional AC / DC. In another example, the power grid can be connected to the DC bus through a transformer and a bidirectional AC / DC, and each storage device E sc In another exemplary embodiment, the power grid can be connected to the DC bus through a transformer, and each storage device E sc They can be connected to the DC bus through the corresponding bidirectional AC / DC. sc Connection to the grid can also be achieved through other means.

[0203] In the embodiment of the present application, any storage device E sc The charging components in the storage and charging device E sc When the connection component in the embodiment is connected to the first target electrical equipment, the storage device E sc The electric energy stored in the first energy storage unit in the connection component is used to charge the first target electrical device according to the target charging mode; wherein the ratio of the rated energy of the first energy storage unit to the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; and the first preset ratio threshold value is a positive number greater than 1.

[0204] It should be noted that any storage device E in the embodiment of the present application sc For the implementation methods of each component in the embodiment, please refer to the relevant content in the above storage and charging device embodiment of this application, which will not be repeated here.

[0205] In summary, in the embodiments of the present application, the charging component in any storage and charging device can charge the first target power-consuming device by using the electric energy stored in the first energy storage unit in the energy storage component, without directly using the electric energy of the power grid to charge the target power-consuming device, which can alleviate the power demand for the power grid, thereby alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiments of the present application do not need to add a transformer, and do not need to expand the capacity of the transformer, which is conducive to saving the additional cost of the storage and charging device. In addition, by the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit being greater than or equal to the first preset ratio threshold (that is, the rated energy of the first energy storage unit is greater than the maximum charge and discharge power), on the one hand, it is conducive to reducing the charge and discharge rate of the first energy storage unit, so that the storage and charging device does not need to set up a thermal management system corresponding to the first energy storage unit, thereby further saving the additional cost of the storage and charging device. On the other hand, it is conducive to increasing the charge and discharge power of the first energy storage unit, so that the charge and discharge power of the first energy storage unit can meet the charging demand of the power-consuming device.

[0206] In some embodiments, the maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

[0207] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit can charge the first target electrical equipment through the connecting 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.

[0208] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit can charge the first target electrical equipment through the connecting component at a second discharge rate not greater than a 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.

[0209] In some embodiments, each storage device E sc The first energy storage unit can store electric energy when the load of the power grid is less than a preset load threshold.

[0210] In some embodiments, the first energy storage unit includes multiple battery packs, wherein different battery packs have different battery performance parameters; the first energy storage unit can specifically store electrical energy in a target battery pack according to the balance of the battery performance parameters when the load of the power grid is less than a preset load threshold; wherein the target battery pack is a battery pack among the multiple battery packs in the first energy storage unit.

[0211] In some embodiments, the storage device E sc The charging component in the storage and charging device can specifically use the electric energy stored in the target battery pack to charge the first target electric device through the connecting component according to the target charging mode when the connecting component in the storage and charging device is connected to the first target electric device.

[0212] In some embodiments, the storage device E sc The energy storage component further includes a second energy storage unit capable of storing electric energy when the load of the power grid is less than a preset load threshold, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit;

[0213] Storage and charging equipment sc The charging component in the charging storage device may be specifically connected to the first target power-consuming device by using the charging storage device E scThe electric energy stored in the first energy storage unit and / or the second energy storage unit is used to charge the first target electrical equipment according to the target charging mode through the connecting component; wherein the ratio between the rated energy of the second energy storage unit and the maximum charge and discharge power is less than or equal to the second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold.

[0214] It should be noted that any storage device E in the embodiment of the present application sc For the implementation methods of each component in the above storage and charging device embodiment of this application, please refer to the relevant content, which will not be repeated here.

[0215] In some embodiments, Figure 6 The schematic diagram of the structure of the charging system of the electric device provided in some other embodiments of the present application is as follows: Figure 6 As shown, the electrical equipment charging system may also include: sc The first additional energy storage unit U connected aesu1 .

[0216] Exemplarily, at least one storage device E sc Can be combined with the first additional energy storage unit U aesu1 Direct connection. In another exemplary embodiment, at least one storage device E sc Can be combined with the first additional energy storage unit U aesu1 Indirect connection. For example, at least one storage device E sc Can be connected to the DC bus, the first additional energy storage unit U aesu1 Can be connected to the DC bus, so that the storage device E sc With the first additional energy storage unit U aesu1 The purpose of indirect connection can be achieved through a DC bus.

[0217] The first supplementary energy storage unit U in the embodiment of the present application aesu1 The rated energy of the first additional energy storage unit U aesu1 The ratio between the maximum charge and discharge power of the first supplementary energy storage unit U is greater than or equal to the first preset supplementary ratio threshold, wherein the first preset supplementary ratio threshold can be a positive number greater than 1. aesu1 The rated energy of the first additional energy storage unit U aesu1 The ratio of the maximum charge and discharge powers is greater than or equal to (i.e. not less than) 1:0.5.

[0218] It should be understood that in the embodiment of the present application, the first additional energy storage unit U aesu1 The rated energy of the first additional energy storage unit U aesu1 The ratio between the maximum charge and discharge powers of the first supplementary energy storage unit U is greater than or equal to the first preset supplementary ratio threshold value, which is conducive to reducing the first supplementary energy storage unit Uaesu1 The charging and discharging rate is such that the charging system of the electric equipment does not need to be provided with the first additional energy storage unit U aesu1 The corresponding thermal management system can adopt natural cooling, thereby saving the cost of the charging system of electrical equipment.

[0219] In some embodiments, the rated energy of the first supplementary energy storage unit is related to the total input power and the total rated energy corresponding to each charging device.

[0220] Exemplarily, the rated energy of the first supplementary energy storage unit and the total input power and total rated energy corresponding to each storage and charging device may satisfy the following relationship: Eess≤Pin*C1*100%-Ecc.

[0221] Wherein, Eess represents the rated energy of the first supplementary energy storage unit; Pin represents the total input power corresponding to each storage device; C1 represents the first preset coefficient; Ecc represents the total rated energy corresponding to each storage device. For example, C1 can be any value between 4 and 12.

[0222] It should be understood that when each storage and charging device is respectively provided with a corresponding bidirectional AC / DC, the total input power corresponding to each storage and charging device can be equal to the sum of the powers of the bidirectional AC / DC corresponding to each storage and charging device; when each storage and charging device is respectively provided with the same bidirectional AC / DC, the total input power corresponding to each storage and charging device can be equal to the power of the bidirectional AC / DC corresponding to each storage and charging device.

[0223] Of course, the rated energy of the first supplementary energy storage unit and the total input power and total rated energy corresponding to each storage and charging device can also satisfy other equivalent or modified relationships of the above relationship.

[0224] In the embodiment of the present application, by correlating the rated energy of the first supplementary energy storage unit with the total input power and total rated energy corresponding to each storage and charging device, the rated energy of the first supplementary energy storage unit can be reasonably configured so that the energy storage supplement time of the first supplementary energy storage unit can be less than or equal to twelve hours.

[0225] In some embodiments, the maximum charge and discharge power of the first supplementary energy storage unit can be greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode, which is conducive to ensuring that the charge and discharge power of the first supplementary energy storage unit can meet the charging requirements of the target electrical equipment according to the target charging mode.

[0226] The first supplementary energy storage unit U in the embodiment of the present application aesu1 , it is possible to store electric energy when the load of the power grid is less than a preset load threshold, and to charge at least one storage device E when the load of the power grid is not less than the preset load threshold. sc Provide electrical energy.

[0227] Exemplarily, the first additional energy storage unit U aesu1 When the load of the power grid is less than the preset load threshold, the power grid can be connected to each storage device E sc The energy storage components store electrical energy separately.

[0228] In another exemplary embodiment, the first additional energy storage unit U aesu1 The load of the power grid can be less than the preset load threshold, and each storage device E sc When the energy storage components complete the energy storage, the energy storage is performed.

[0229] Furthermore, considering the cost saving of electric energy, the first additional energy storage unit U aesu1 When the load of the power grid is less than a preset load threshold and the power grid is currently in a valley period, electric energy storage can be performed to save the cost of electric energy storage.

[0230] In some embodiments, the first supplementary energy storage unit U aesu1 It is also possible to charge at least one storage device E when the load of the power grid is not less than a preset load threshold. sc Provides electrical energy without directly using the power of the grid to charge the storage device E sc Providing electric energy can further alleviate the demand for electricity on the power grid, thereby further alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not require the addition of a transformer, and does not require the expansion of the transformer, which is beneficial to saving the cost of adding storage and charging equipment.

[0231] In addition, through the first additional energy storage unit U aesu1 The rated energy of the first additional energy storage unit U aesu1 The ratio between the maximum charge and discharge powers of the first supplementary energy storage unit U is greater than or equal to the first preset supplementary ratio threshold value, which is conducive to reducing the first supplementary energy storage unit U aesu1 The charging and discharging rate is such that the charging system of the electric equipment does not need to be provided with the first additional energy storage unit U aesu1 The corresponding thermal management system can save the cost of the charging system for electrical equipment.

[0232] In some embodiments, the present application embodiment provides a first supplementary energy storage unit U aesu1 The first additional energy storage unit U in the embodiment of the present application is further described in detail. aesu1 The battery performance parameters may include but are not limited to multiple supplementary battery packs, wherein different supplementary battery packs have different battery performance parameters. For example, the battery performance parameters may include but are not limited to battery life parameters and / or battery remaining power.

[0233] The first supplementary energy storage unit U in the embodiment of the present application aesu1 Specifically, when the load of the power grid is less than a preset load threshold, electric energy can be stored in a target supplementary battery pack among multiple supplementary battery packs according to the balance of battery performance parameters; and when the load of the power grid is not less than the preset load threshold, electric energy stored in the target supplementary battery pack can be used to provide electric energy for at least one charging storage device.

[0234] It should be noted that the first additional energy storage unit U aesu1 The feasible methods of storing and releasing electric energy can refer to the relevant contents about storing and releasing electric energy by the first energy storage unit in the above-mentioned storage and charging device embodiment of the present application, which will not be repeated here.

[0235] It should be understood that in the first additional energy storage unit U aesu1 And each storage and charging equipment E sc When both are connected to the DC bus, the first additional energy storage unit U aesu1 When the load of the power grid is not less than a preset load threshold, the electric energy stored in the target supplementary battery pack can be used to provide electric energy for other devices or components connected to the DC bus.

[0236] In summary, in the embodiment of the present application, the first supplementary energy storage unit can store electric energy for a target supplementary battery pack among multiple supplementary battery packs according to the balance of battery performance parameters when the load of the power grid is less than a preset load threshold; further, the first supplementary energy storage unit can use the electric energy stored in the target supplementary battery pack to provide electric energy to at least one storage and charging device when the load of the power grid is not less than the preset load threshold. It can be seen that in the embodiment of the present application, by storing electric energy for a target supplementary battery pack among multiple supplementary batteries according to the balance of battery performance parameters, and using the electric energy stored in the target supplementary battery pack to provide electric energy to the storage and charging device, it can not only help to improve the power supply stability of the storage and charging device on the basis of saving the cost of the charging system of the power-consuming device, but also help to improve the service life of the first supplementary energy storage unit.

[0237] In some embodiments, Figure 7 The schematic diagram of the structure of the charging system of the electric device provided in some other embodiments of the present application is as follows: Figure 7 As shown, in order to further increase the rated energy of the electric device charging system, the electric device charging system of the embodiment of the present application may also include: sc The second additional energy storage unit U connected aesu2 Among them, the second additional energy storage unit U aesu2 The charge and discharge rate is greater than that of the first additional energy storage unit U aesu1 The charge and discharge rate.

[0238] The second additional energy storage unit U in the embodiment of the present application aesu2 The rated energy of the second additional energy storage unit U aesu2 The ratio between the maximum charge and discharge powers is less than or equal to a second preset supplementary ratio threshold, wherein the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0239] The second additional energy storage unit U in the embodiment of the present application aesu2 , it can store electric energy when the load of the power grid is less than a preset load threshold, and provide electric energy to at least one storage device when the load of the power grid is not less than the preset load threshold and the remaining electric energy of the first supplementary energy storage unit is less than the preset electric energy threshold.

[0240] Exemplarily, the second additional energy storage unit U aesu2 , when the load of the power grid is less than the preset load threshold, the first additional energy storage unit U aesu1 Store electrical energy separately.

[0241] In another exemplary embodiment, the second additional energy storage unit U aesu2 , the load of the power grid is less than the preset load threshold, and the first additional energy storage unit U aesu1 When the electric energy storage is completed, the electric energy storage is performed.

[0242] Furthermore, considering the cost of saving electricity, the second additional energy storage unit U aesu2 When the load of the power grid is less than a preset load threshold and the power grid is currently in a valley period, electric energy storage can be performed to save the cost of electric energy storage.

[0243] In some embodiments, the second supplementary energy storage unit U aesu2 It is also possible to charge at least one storage device E when the load of the power grid is not less than a preset load threshold and the remaining power of the first supplementary energy storage unit is less than a preset power threshold. sc Provide electrical energy.

[0244] In some embodiments, the second supplementary energy storage unit U aesu2 It is also possible to charge at least one storage device E when the load of the power grid is not less than a preset load threshold. sc Provide electrical energy and add energy storage unit U in the second aesu2 When the remaining power of the energy storage device is less than the preset power threshold, the energy storage device stops providing power to the at least one charging device so that the first additional energy storage unit U aesu1 Providing electrical energy to at least one charging storage device.

[0245] In some embodiments, the second supplementary energy storage unit U aesu2When the load of the power grid is not less than the preset load threshold, the first additional energy storage unit U aesu1 Together, at least one storage device E sc Provide electrical energy.

[0246] It should be understood that in the second additional energy storage unit U aesu2 and at least one storage device E sc When both are connected to the DC bus, the second additional energy storage unit U aesu2 It can also provide power to other devices (such as AC charging equipment, etc.) or components connected to the DC bus when the load of the power grid is not less than a preset load threshold.

[0247] In summary, in the embodiments of the present application, the charging system for an electrical device may further include: a second supplementary energy storage unit connected to at least one storage and charging device; by providing electrical energy to at least one storage and charging device through the second supplementary energy storage unit and / or the first supplementary energy storage unit, the flexibility of providing electrical energy to the storage and charging device can be improved, thereby facilitating further improving the power supply stability of the storage and charging device.

[0248] In some embodiments, Figure 8 The schematic diagram of the structure of the charging system of the electric device provided in some other embodiments of the present application is as follows: Figure 8 As shown, the electric device charging system of the embodiment of the present application may also include: sc Connected power generation unit U g . Exemplarily, the power generation unit U g It may include, but is not limited to, photovoltaic power generation units and / or wind power generation units.

[0249] Exemplarily, at least one storage device E sc Can be used with power generation unit U g Direct connection. In another exemplary embodiment, at least one storage device E sc Can be used with power generation unit U g Indirect connection. For example, at least one storage device E sc Can be connected to the DC bus, the power generation unit U g Can be connected to the DC bus, so that the storage device E sc With power generation unit U g The purpose of indirect connection can be achieved through a DC bus.

[0250] The power generation unit U in the embodiment of the present application g , when the load of the power grid is not less than the preset load threshold, at least one storage device E can be charged. sc Provides electrical energy without directly using the power of the grid to charge the storage device E scProviding electric energy can further alleviate the demand for electricity on the power grid, thereby further alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not require the addition of a transformer, and does not require the expansion of the transformer, which is beneficial to saving the cost of adding storage and charging equipment.

[0251] It should be understood that in the power generation unit U g and at least one storage device E sc When both are connected to the DC bus, the generating unit U g It can also provide power to other devices (such as AC charging equipment, etc.) or components connected to the DC bus when the load of the power grid is not less than a preset load threshold.

[0252] In summary, in the embodiments of the present application, the charging system for an electrical device may further include: a power generation unit connected to at least one storage and charging device; the power generation unit can provide electrical energy to at least one storage and charging device when the load of the power grid is not less than a preset load threshold, thereby further improving the flexibility of providing electrical energy to the storage and charging device, thereby facilitating further improving the power supply stability of the storage and charging device.

[0253] In some embodiments, Fig. 9 The schematic diagram of the structure of the charging system of the electric device provided in some other embodiments of the present application is as follows: Fig. 9 As shown, the electric device charging system of the embodiment of the present application may also include: a plurality of AC charging devices E acc Among them, multiple AC charging devices E acc It can be connected to at least one charging device and a supplementary energy storage unit (for example, a first supplementary energy storage unit and / or a second supplementary energy storage unit) respectively.

[0254] For example, multiple AC charging devices E acc The AC charging devices E can be directly connected to at least one charging device and an additional energy storage unit. acc It can be indirectly connected to at least one charging device and an additional energy storage unit. acc It can be connected to the DC bus, at least one charging device and an additional energy storage unit are connected to the DC bus respectively, so that multiple AC charging devices E acc The purpose of indirect connection between at least one charging device and the supplementary energy storage unit can be achieved through a DC bus. For another example, multiple AC charging devices E acc The AC busbar can be connected to the at least one charging device and the supplementary energy storage unit respectively, and the at least one charging device and the supplementary energy storage unit can be connected to the AC busbar through the DC busbar and the bidirectional AC / DC respectively, so that the multiple AC charging devices E acc The purpose of indirect connection can be achieved with at least one charging device and an additional energy storage unit.

[0255] The AC charging device E in the embodiment of the present application acc , when the second target electric device is connected and the load of the power grid is less than a preset load threshold, the electric energy provided by the power grid can be used to charge the second target electric device connected to the AC charging device.

[0256] It should be understood that the AC charging device E acc When the load of the power grid is less than the preset load threshold, the method of using the electric energy provided by the power grid to charge the second target power-consuming device connected to the AC charging device will not affect the power grid supplying power to the basic load equipment through the transformer, and can also fully and reasonably utilize the remaining electric energy within the existing transformer capacity.

[0257] It can be seen that in the embodiment of the present application, when the AC charging device is connected to the second target power-consuming device and the load of the power grid is less than the preset load threshold, the power grid uses the power provided by the power grid to charge the second target power-consuming device connected to the AC charging device. On the one hand, it will not affect the power grid supplying power to the basic load device through the transformer, and there is no need to add a transformer, and there is no need to expand the transformer, which is conducive to saving the cost of adding storage and charging equipment. On the other hand, it can also fully and reasonably utilize the power surplus in the existing transformer capacity, which is conducive to improving the power utilization rate of the transformer.

[0258] In some embodiments, the AC charging device E in the embodiments of the present application acc , and when the load of the power grid is not less than the preset load threshold, at least one storage device E can be used to sc Or the first additional energy storage unit U aesu1 The power provided is the same as that of the AC charging device E acc The connected second target electric device is charged.

[0259] In the embodiment of the present application, the AC charging device E acc When the load of the power grid is not less than the preset load threshold, at least one storage device E is used to sc Or the first additional energy storage unit U aesu1 The power provided is the same as that of the AC charging device E acc The method of charging the connected second target electrical equipment does not require direct use of the electrical energy of the power grid to charge the second target electrical equipment, which can alleviate the electricity demand on the power grid and thus alleviate the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not require the addition of a transformer or the expansion of the transformer, which is beneficial to saving the cost of adding storage and charging equipment.

[0260] It should be understood that in the AC charging device E acc , at least one storage device Esc and / or the first additional energy storage unit U aesu1 When the AC charging equipment E is connected to the DC bus, acc When the load of the power grid is not less than the preset load threshold, other devices (such as a second supplementary energy storage unit or a power generation unit, etc.) or components connected to the DC bus can also be used to provide power for the AC charging device E acc The connected second target electric device is charged.

[0261] In some embodiments, in order for the electric device charging system to better achieve linkage control, the electric device charging system of the embodiment of the present application may further include: a monitoring device connected to each storage and charging device.

[0262] Exemplarily, the monitoring device may be a device independent of each storage and charging device, wherein the monitoring device may be connected to a control component in each storage and charging device respectively.

[0263] In another exemplary embodiment, the monitoring device may be a control component in each storage and charging device, that is, the control component serves as the overall control component of the charging system of the electric device, wherein the non-overall control components in each storage and charging device are respectively connected to the overall control component.

[0264] As another example, the monitoring device may be a control component in other devices (eg, an AC charging device or a supplementary energy storage unit) in the electric device charging system, that is, the control component serves as a general control component of the electric device charging system.

[0265] The monitoring device in the embodiment of the present application can control the charging component in any storage and charging device. When the connecting component in the storage and charging device is connected to the first target power-consuming device, the monitoring device can use the electric energy stored in the energy storage component in the storage and charging device to charge the first target power-consuming device through the connecting component according to the target charging mode.

[0266] Exemplarily, upon learning that a connecting component in any charging and storage device is connected to a first target electrical device, the monitoring device may control the charging component in the charging and storage device to utilize 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 charging and storage device to charge the first target electrical device according to a target charging mode through the connecting component.

[0267] It should be understood that the monitoring device can also control other storage 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 power device to replenish energy for the storage device when it is learned that the connecting component in any storage device is connected to the first target power user and the remaining power of the energy storage component in the storage device is insufficient, so that the charging component in the storage device can charge the first target power user through the connecting component according to the target charging mode.

[0268] It should be understood that the monitoring device can also control the energy storage components in each 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, etc. when the load of the power grid is less than a preset load threshold.

[0269] Furthermore, in order to save electricity costs, the monitoring device can control the energy storage components in each 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, etc., when the load of the power grid is less than a preset load threshold and the power grid is currently in a valley period of electricity prices, so as to save the cost of electricity storage.

[0270] In some embodiments, based on the above embodiments, in the embodiments of the present application, the charging system for the electric device includes at least one charging storage device E sc , the first additional energy storage unit U aesu1 , the second additional energy storage unit U aesu2 , Photovoltaic power generation unit U g-p and at least one AC charging device E acc Taking as an example, the overall structure of the charging system for electrical equipment is introduced and explained.

[0271] Fig.10 The schematic diagram of the structure of the charging system of the electric device provided in some other embodiments of the present application is as follows: Fig.10 As shown, the electric device charging system of the embodiment of the present application may also include: m storage and charging devices E sc , the first additional energy storage unit U aesu1 , the second additional energy storage unit U aesu2 , Photovoltaic power generation unit U g-p and n AC charging devices E acc ; Wherein, m and n are both integers greater than 0.

[0272] For example, the storage device E in the embodiment of the present application sc It can be a storage device with low power input but high power output, so as to realize fast charging and super charging functions. sc The input power can be less than or equal to 150kW, and the storage and charging equipment Esc The output power of the charging component can be greater than or equal to 360kW.

[0273] For example, the storage device E in the embodiment of the present application sc The charge and discharge rate can be less than the storage device E sc The charge and discharge rate of storage equipment E sc The charging and discharging speed can be lower than that of the storage device E sc For example, the charging and discharging speed of the storage device E sc Can be used to realize slow charging function.

[0274] For example, each device or unit in the electric device charging system can be connected to the DC bus B DC Connection, 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 may be provided between them. Fig.10 Each storage device E sc Through the corresponding bidirectional AC / DC, and AC bus B AC Connection; of course, multiple storage devices E sc Can share the same bidirectional AC / DC, and AC bus B AC It should be understood that the AC bus B AC It can also be connected to base load equipment.

[0275] It should be noted that in each storage and charging device E sc Through the corresponding bidirectional AC / DC and AC bus B AC When connected, each storage device E sc The corresponding bidirectional AC / DC can be set in the storage and charging equipment E sc Or it can be set in the storage device E sc outside.

[0276] The storage and charging device E in the embodiment of the present application sc It may include but is not limited to energy storage component 10, charging component 11, connection component 12, control component 13 and communication component 14. For example, charging component 11 may include but is not limited to bidirectional DC / DC; of course, it may also include other components, which can be set according to actual needs. Among them, energy storage component 10 can connect to DC bus B through the first charging and discharging path L1. DC The charging component 11 can be connected to the DC bus B DC The connecting component 12 can be connected to the DC bus B through the second charging and discharging path L2 DCThe energy storage component 10 can be connected from the DC bus B to the charging component 11 and the connecting component 12. DC To obtain electrical energy, or to provide DC bus B DC When the second charge-discharge path L2 is in the on state, the connecting component 12 can provide electrical energy to the DC bus B DC Of course, the connecting component 12 can also be connected from the DC bus B DC Get electrical energy.

[0277] Illustratively, any charging and discharging path involved in the embodiments of the present application may include, but is not limited to, a controllable switch element so as to switch the on and off state of the charging and discharging path.

[0278] The first supplementary energy storage unit U in the embodiment of the present application aesu1 The supplementary battery packs may include but are not limited to p additional battery packs and additional control components; wherein the additional control components may be connected to the p additional battery packs respectively. In addition, each additional battery pack may be connected to one end of the supplementary path L3 through a corresponding bidirectional DC / DC, and the other end of the supplementary path may be connected to the DC bus B AC When the supplementary path L3 is in the conducting state, the first supplementary energy storage unit U aesu1 From DC bus B DC To obtain electrical energy, or to provide DC bus B DC Provide electrical energy.

[0279] Illustratively, the supplementary path in the embodiment of the present application may include, but is not limited to, a controllable switch element, so as to switch the on and off state of the supplementary path L3.

[0280] In addition, the power of the bidirectional DC / DC corresponding to any supplementary battery pack in the embodiments of the present application is related to the electrical energy of the supplementary battery pack.

[0281] Exemplarily, the power of the bidirectional DC / DC corresponding to any supplementary battery pack and the electrical energy of the supplementary battery pack can satisfy the following relationship: Pdcdci= Eessi*C2*100%.

[0282] Wherein, Pdcdci represents the power of the bidirectional DC / DC corresponding to the supplementary battery pack i; Eessi represents the electric energy of the supplementary battery pack i; C2 represents the second preset coefficient. Exemplarily, C2 can be any value between 0.1 and 0.5.

[0283] Of course, the power of the bidirectional DC / DC corresponding to any supplementary battery pack and the electrical energy of the supplementary battery pack may also satisfy other variations or equivalent relationships of the above relationship.

[0284] The AC charging device E in the embodiment of the present application acc It may include but is not limited to an AC charging pile and a corresponding AC control component. In addition, each AC charging pile may be connected to one end of the AC path L4 through a corresponding bidirectional DC / AC, and the other end of the AC path may be connected to the DC bus B AC When the AC path is in the on state, the AC charging pile can be connected from the DC bus B DC Get electrical energy.

[0285] Illustratively, the AC path L4 in the embodiment of the present application may include, but is not limited to, a controllable switch element, so as to switch the on and off state of the AC path L4.

[0286] The photovoltaic power generation unit U in the embodiment of the present application g-p It may include but is not limited to k photovoltaic panels, maximum power point tracking (MPPT) components corresponding to each photovoltaic panel, and a photovoltaic control component.

[0287] It should be noted that, in the embodiment of the present application, the monitoring device is shown as a control component in a device in the charging system of the electric device. Fig.10 The control components of each device in the system can be interconnected so that the monitoring device can control the operation of each device.

[0288] Fig.11 A schematic diagram of the cloud architecture provided in the embodiment of the present application is shown in FIG. Fig.11 As shown, in the embodiment of the present application, the control components of each device are connected to the cloud service through the corresponding communication components based on the network communication technology, and the monitoring device can be connected to the cloud service through the network communication technology, that is, each control component and the monitoring device can be indirectly connected through the cloud service. Among them, the network communication technology may include but is not limited to the fourth generation communication technology (4th-Generation, 4G) or the fifth generation communication technology (5th-Generation, 5G). It can be seen that the embodiment of the present application realizes intelligent monitoring and control through cloud services and monitoring devices.

[0289] In addition, the electrical equipment charging system may further include an electric energy meter connected to the transformer so as to obtain the detection power of the transformer.

[0290] Fig.12 The schematic diagram of the structure of the charging system of the electric device provided in some other embodiments of the present application is as follows: Fig.12 As shown, the electric device charging system of the embodiment of the present application may also include: m storage and charging devices E sc , the first additional energy storage unit U aesu1 , the second additional energy storage unit Uaesu2 , Photovoltaic power generation unit U g-p and n AC charging devices E acc Among them, different from Fig.10 , Fig.11 n AC charging devices E in acc Directly connected to AC bus B AC connect.

[0291] The AC charging device E in the embodiment of the present application acc It may include but is not limited to an AC charging pile and a corresponding AC control component, wherein each AC charging pile may be connected to an AC bus bar B AC connect.

[0292] Combination Fig.10 and Fig.12 As shown, the electric device charging system of the embodiment of the present application may include a storage and charging device E sc , the first additional energy storage unit U aesu1 and AC charging equipment E acc , you can also choose a second additional energy storage unit U aesu2 and photovoltaic power generation unit U g-p , realizing a full-scenario charging architecture. When the load of the power grid is less than the preset load threshold, the power grid will charge the AC charging device E acc Provides electricity and can also charge storage devices E sc , the first additional energy storage unit U aesu1 , the second additional energy storage unit U aesu2 When the load of the power grid is not less than the preset load threshold, the storage device E sc , add energy storage unit or photovoltaic power generation unit U g-p Intelligently charge AC devices E acc Provide electrical energy and add energy storage unit or photovoltaic power generation unit U g-p It can also intelligently charge the storage device E sc Provide electrical energy so that energy can be intelligently distributed without adding transformers or expanding the capacity of transformers, thereby realizing storage and charging equipment E sc DC charging, and AC charging equipment E acc A full-scenario charging solution for AC charging.

[0293] In some embodiments, based on the above embodiments, the full-scenario charging control method of the electric device charging system is exemplarily introduced and explained in the embodiments of the present application. Fig.13 A flowchart of a full-scenario charging control method for an electric device charging system provided in some embodiments of the present application, such as Fig.13As shown, the method of the embodiment of the present application may include the following steps:

[0294] Step S1301: The monitoring device determines whether a connection signal of an electrical device is detected.

[0295] If the power-consuming device connection signal is detected, step S1302 is executed; if the power-consuming device connection signal is not detected, step S1313 is executed.

[0296] Step S1302: The monitoring device determines whether the connection component of the storage and charging device is connected to the target electrical device.

[0297] If the connection component of the storage and charging device is connected to the target power-consuming device, step S1303 is executed; if the connection component of the storage and charging device is not connected to the target power-consuming device, step S1305 is executed.

[0298] Step S1303: The monitoring device controls the storage and charging device to charge the target power-consuming device according to the target charging mode through the connection component.

[0299] Exemplarily, the storage and charging device can use the electric energy stored in the energy storage component of the storage and charging device to charge the target electric device. In another exemplary embodiment, the storage and charging device can also use the electric energy provided by the supplementary energy storage unit and / or the power generation unit to charge the target electric device.

[0300] Step 1304: The monitoring device determines whether a first preset charging end condition is met.

[0301] Exemplarily, the first preset charging termination condition may include but is not limited to at least one of the following: the remaining power of the energy storage component of the charging device is less than a preset power threshold, there is preset alarm information in the charging device or the target power-consuming device, and a stop charging request sent by the target power-consuming device is received.

[0302] 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 .

[0303] Step S1305: The monitoring device determines whether the AC charging device is connected to the target power-consuming device.

[0304] If the AC charging device is connected to the target power-consuming device, step S1306 is executed; if the AC charging device is not connected to the target power-consuming device, step S1312 is executed.

[0305] Step S1306: The monitoring device obtains the detection power of the transformer detected by the electric energy meter.

[0306] Step S1307: The monitoring device determines whether the load of the power grid is less than a preset load threshold according to the detected power.

[0307] If the load of the power grid is less than the preset load threshold, step S1308 is executed; if the load of the power grid is not less than the preset load threshold, step S1310 is executed.

[0308] Step S1308: The monitoring device controls the AC charging device to charge the target electrical device using the electrical energy provided by the power grid.

[0309] Step S1309: The monitoring device determines whether a second preset charging end condition is met.

[0310] Exemplarily, the second preset charging termination condition may include, but is not limited to, at least one of the following: the existence of preset alarm information in the AC charging device or the target power-consuming device, and the receipt of a charging stop request sent by the target power-consuming device.

[0311] 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 .

[0312] Step S1310: The monitoring device controls the AC charging device to charge the target electrical device using the electrical energy provided by the charging device or the first supplementary energy storage unit.

[0313] Step S1311: The monitoring device determines whether a second preset charging end condition is met.

[0314] 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 .

[0315] Step S1312: The monitoring device outputs a prompt message indicating that the electrical device connection signal is wrong.

[0316] Exemplarily, 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, so as to achieve the warning target.

[0317] Step S1313: The monitoring device obtains the detection power of the transformer detected by the electric energy meter.

[0318] Step S1314: The monitoring device determines whether the load of the power grid is less than a preset load threshold according to the detected power.

[0319] If the load of the power grid is less than the preset load threshold, step S1315 is executed; if the load of the power grid is not less than the preset load threshold, step S1301 is executed.

[0320] Step S1315: The monitoring device determines whether the current power grid electricity price is in a valley period.

[0321] If the current time is during the off-peak period of the power grid electricity price, execute step S1316; if the current time is not during the off-peak period of the power grid electricity price, execute step S1301.

[0322] Step S1316: The monitoring device controls the energy storage components in the storage and charging device to store electric energy using the electric energy provided by the power grid.

[0323] Step S1317: The monitoring device determines whether the load of the power grid is less than a preset load threshold according to the detected power.

[0324] If the load of the power grid is less than the preset load threshold, execute step S1318; if the load of the power grid is not less than the preset load threshold, execute step S1323.

[0325] Step S1318: The monitoring device determines whether the energy storage component in the storage and charging device has completed electrical energy storage.

[0326] If the energy storage component in the storage device completes the storage of electric energy, execute step S1319; if the energy storage component in the storage device does not complete the storage of electric energy, execute step S1316.

[0327] Step S1319: The monitoring device controls the supplementary energy storage unit to store electric energy using the electric energy provided by the power grid.

[0328] Exemplarily, the monitoring device may preferentially control the first supplementary energy storage unit to store electric energy, and then control the second supplementary energy storage unit to store electric energy.

[0329] Step S1320: The monitoring device determines whether the load of the power grid is less than a preset load threshold according to the detected power.

[0330] If the load of the power grid is less than the preset load threshold, step S1321 is executed; if the load of the power grid is not less than the preset load threshold, step S1322 is executed.

[0331] Step S1321: The monitoring device determines whether the supplementary energy storage unit has completed the energy storage.

[0332] If the supplementary energy storage unit completes the energy storage, the process ends; if the supplementary energy storage unit does not complete the energy storage, the process proceeds to step S1319.

[0333] Step S1322: The monitoring device controls the supplementary energy storage unit to stop using the electric energy provided by the power grid to store electric energy.

[0334] Step S1323: The monitoring device controls the energy storage components in the storage and charging device to stop using the electric energy provided by the power grid to store electric energy.

[0335] In summary, in the embodiments of the present application, when the load of the power grid is less than the preset load threshold, the power grid's electric energy (the remaining electric energy within the existing transformer capacity) can be used for AC charging and / or equipment energy replenishment; when the load of the power grid is not less than the preset load threshold, the storage and charging equipment or the additional energy storage unit can be directly used to provide electric energy for the AC charging equipment. It can be seen that the embodiments of the present application can intelligently allocate energy without adding a transformer or expanding the transformer, thereby realizing a full-scenario charging solution for DC charging of storage and charging equipment and AC charging of AC charging equipment.

[0336] In some embodiments, the embodiments of the present application provide a method for controlling electric energy of a storage and charging device. The specific structure of the storage and charging device in the embodiments of the present application can refer to the relevant content in the above-mentioned storage and charging device embodiments of the present application, which will not be repeated here.

[0337] The method of the embodiment of the present application may include:

[0338] When the connecting component is connected to the target electrical equipment, the charging component in the storage and charging device uses the electric energy stored in the first energy storage unit in the storage and charging device to charge the target electrical equipment through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the first energy storage unit to the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; the first preset ratio threshold value is a positive number greater than 1.

[0339] In some embodiments, the method further comprises:

[0340] The first energy storage unit stores electric energy when the load of the power grid is less than a preset load threshold.

[0341] In some embodiments, the first energy storage unit stores electric energy when the load of the power grid is less than a preset load threshold, including:

[0342] When the load of the power grid is less than a preset load threshold, the first energy storage unit stores electric energy in a target battery pack according to the balance of battery performance parameters; wherein the target battery pack is a battery pack among the multiple battery packs in the first energy storage unit.

[0343] In some embodiments, when the connecting component is connected to the target electric device, the charging component in the storage device uses the electric energy stored in the first energy storage unit in the storage device to charge the target electric device through the connecting component according to the target charging mode, including:

[0344] When the connecting component is connected to the target power-consuming device, the charging component uses the electric energy stored in the target battery pack to charge the target power-consuming device through the connecting component according to the target charging mode.

[0345] In some embodiments, the method further comprises:

[0346] The second energy storage unit in the storage device stores electric energy when the load of the power grid is less than a preset load threshold;

[0347] When the connecting component is connected to the target electrical device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the second energy storage unit to the maximum charge and discharge power of the second energy storage unit is less than or equal to the second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold.

[0348] In some embodiments, when the connection component is connected to the target electric device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electric device through the connection component according to the target charging mode, including:

[0349] The charging component uses the electric energy stored in the first energy storage unit to charge the target electric device through the connecting component according to the target charging mode, and when the remaining electric energy in the first energy storage unit is less than the first preset electric energy threshold, the electric energy stored in the second energy storage unit is used to charge the target electric device through the connecting component according to the target charging mode.

[0350] In some embodiments, when the connection component is connected to the target electric device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electric device through the connection component according to the target charging mode, including:

[0351] The charging component uses the electric energy stored in the second energy storage unit to charge the target electric device through the connecting component according to the target charging mode, and when the remaining electric energy in the second energy storage unit is less than the second preset electric energy threshold, the electric energy stored in the first energy storage unit is used to charge the target electric device through the connecting component according to the target charging mode.

[0352] The storage and charging device in the embodiment of the present application can be used to implement the technical solution in the above-mentioned storage and charging device embodiment of the present application. The implementation principle and technical effect are similar and will not be repeated here.

[0353] In some embodiments, the embodiment of the present application provides a method for controlling electric energy of an electric device charging system. The specific structure of the electric device charging system in the embodiment of the present application can refer to the relevant content in the above-mentioned embodiment of the electric device charging system in the present application, which will not be repeated here.

[0354] The method of the embodiment of the present application may include:

[0355] When it is detected that the connecting component in any storage and charging device is connected to the first target electrical device, the charging component in the storage and charging device is controlled to use the electric energy stored in the first energy storage unit in the storage and charging device to charge the first target electrical device through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the first energy storage unit to the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; the first preset ratio threshold value is a positive number greater than 1.

[0356] In some embodiments, the method further comprises:

[0357] When it is detected that the load of the power grid is less than a preset load threshold, the first energy storage unit of each charging and storage device is controlled to store electric energy.

[0358] In some embodiments, the method further comprises:

[0359] The charging component in the control storage and charging device utilizes the electric 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 electric device according to the target charging mode through the connection component.

[0360] In some embodiments, the method further comprises:

[0361] The first supplementary energy storage unit in the charging system of the electric equipment is controlled to store electric energy when the load of the power grid is less than a preset load threshold, and to provide electric energy to at least one storage and charging device when the load of the power grid is not less than the preset load threshold; wherein the ratio between the rated energy of the first supplementary energy storage unit and the maximum charge and discharge power 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.

[0362] In some embodiments, controlling a first supplementary energy storage unit in a charging system for an electric device to store electric energy when a load of a power grid is less than a preset load threshold, and providing electric energy to at least one storage and charging device when a load of the power grid is not less than a preset load threshold, comprises:

[0363] Control the first supplementary energy storage unit to store electric energy in a target supplementary battery pack according to the balance of battery performance parameters when the load of the power grid is less than a preset load threshold, and to use the electric energy stored in the target supplementary battery pack to provide electric energy to at least one charging storage device when the load of the power grid is not less than the preset load threshold; wherein the target supplementary battery pack is a battery pack among the multiple supplementary battery packs in the first supplementary energy storage unit.

[0364] In some embodiments, the method further comprises:

[0365] The second supplementary energy storage unit in the charging system of the electric equipment is controlled to store electric energy when the load of the power grid is less than a preset load threshold, and to provide electric energy to at least one storage and charging device when the load of the power grid is not less than the preset load threshold and the remaining electric energy of the first supplementary energy storage unit is less than the preset electric energy threshold; wherein the ratio between the rated energy of the second supplementary energy storage unit and the maximum charging and discharging power is less than or equal to the second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

[0366] In some embodiments, the method further comprises:

[0367] The power generation unit in the power-consuming device charging system is controlled to provide electric energy to at least one storage and charging device when the load of the power grid is not less than a preset load threshold.

[0368] In some embodiments, the method further comprises:

[0369] When it is detected that any AC charging device in the power device charging system is connected to a second target power device and the load of the power grid is less than a preset load threshold, the AC charging device is controlled to use the electric energy provided by the power grid to charge the second target power device connected to the AC charging device.

[0370] In some embodiments, the method further comprises:

[0371] When the load of the power grid is not less than a preset load threshold, the AC charging device is controlled to charge a second target power-consuming device connected to the AC charging device using electric energy provided by at least one charging device or the first supplementary energy storage unit.

[0372] The monitoring device in the embodiment of the present application can be used to implement the technical solution in the above-mentioned embodiment of the power device charging system of the present application. Its implementation principle and technical effect are similar and will not be repeated here.

[0373] In some embodiments, Fig.14 This is a flow chart of the power control method provided in some embodiments of the present application. The power control method in the embodiments of the present application can be applied to the energy storage components in the above-mentioned storage device embodiments of the present application. Fig.14 As shown, the method of the embodiment of the present application may include the following steps:

[0374] Step S1401: The energy storage component sends the electric energy storage information of the energy storage component to the control component of the storage and charging device.

[0375] Exemplarily, the electric energy storage information may include, but is not limited to, at least one of the following: rated energy, remaining power, and number of charge and discharge times (or cycle life).

[0376] In this step, the energy storage component can send the energy storage information of the energy storage component to the control component of the storage and charging device, so that the control component can determine the charging parameters of the target power-consuming device according to the energy storage information of the energy storage component and the power demand of the target power-consuming device. The charging parameters may include but are not limited to the charging voltage and / or the charging current.

[0377] Step S1402, in response to the conduction of the discharge path, the energy storage component outputs target electric energy to the charging component of the storage and charging device using the electric energy stored in the first energy storage unit in the energy storage component, wherein the target electric energy is used by the charging component to charge the target electrical device through the connecting component of the storage and charging device according to the target charging mode.

[0378] Among them, the ratio between the rated energy of the first energy storage unit and the maximum charge and 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.

[0379] Exemplarily, the energy storage component in the embodiment of the present application 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 electric energy to the charging component. It should be understood that when the control component controls the discharge path to be in an open circuit state, the energy storage component cannot output the target electric energy to the charging component.

[0380] In this step, the energy storage component can respond to the conduction of the discharge path and use the electric energy stored in the first energy storage unit in the energy storage component to output the target electric energy to the charging component of the storage and charging device, so that the charging component uses the target electric energy to charge the target electric device through the connection component of the storage and charging device according to the target charging mode. Exemplarily, the control component can control the charging component to charge the target electric device with reference to the above charging parameters.

[0381] 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 programmatically control whether the energy storage component outputs the target electrical energy to the charging component, or can also control whether the energy storage component outputs the target electrical energy to the charging component in other ways.

[0382] It should be noted that the feasible way in which the charging component uses the electric energy stored in the energy storage component to charge the target electrical equipment can refer to the relevant content in the above-mentioned storage and charging device embodiment of this application, and will not be repeated here.

[0383] In summary, in the embodiment of the present application, the energy storage component sends the energy storage information of the energy storage component to the control component of the storage and charging device; further, in response to the conduction of the discharge path, the energy storage component uses the electric energy stored in the first energy storage unit in the energy storage component to output the target electric energy to the charging component of the storage and charging device, so that the charging component can use the target electric energy to charge the target electric device through the connection component of the storage and charging device according to the target charging mode. It can be seen that in the embodiment of the present application, the charging component can charge the target electric device by using the target electric energy output by the first energy storage unit in the energy storage component, without directly using the electric energy of the power grid to charge the target electric device, which can alleviate the power demand for the power grid, thereby alleviating the pressure on the transformer connected to the power grid. Therefore, the embodiment of the present application does not need to add a transformer, and does not need to expand the capacity of the transformer, which is conducive to saving the cost of adding storage and charging equipment. In addition, by ensuring that the ratio of the rated energy of the first energy storage unit to the maximum charge and discharge power of the first energy storage unit 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 the maximum charge and discharge power), it is helpful to reduce the charge and discharge rate of the first energy storage unit, so that the energy storage component does not need to be provided with a thermal management system corresponding to the first energy storage unit, thereby saving the cost of the energy storage component.

[0384] In some embodiments, the maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

[0385] In some embodiments, when the target charging mode is the first charging mode, the first energy storage unit may output the target electric energy to the charging component of the storage and charging device at a first discharge rate that is 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.

[0386] In some embodiments, when the target charging mode is the second charging mode, the first energy storage unit may output the target electric energy to the charging component of the storage and charging device at a second discharge rate that is not greater than a 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.

[0387] In some embodiments, the energy storage assembly further includes a second energy storage unit, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit;

[0388] In response to the conduction of the discharge path, the energy storage component can also use the electric energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to output the target electric energy to the charging component of the storage and charging device; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charge and discharge power of the second energy storage unit is less than or equal to the second preset ratio threshold, and the second preset ratio threshold is less than the first preset ratio threshold.

[0389] In some embodiments, the second energy storage unit satisfies one or more of the following conditions:

[0390] The ratio between the rated energy of the second energy storage unit and the maximum discharge power of the second energy storage unit is not greater than 1:3;

[0391] The energy density of the second energy storage unit is greater than or equal to 380 Wh / L;

[0392] 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.

[0393] 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.

[0394] The rated energy of any energy storage unit involved in the embodiments of the present application (or referred to as energy storage rated energy, or rated energy storage energy) may refer to the total electrical energy that the energy storage unit can provide to the external system after being fully charged. Correspondingly, the rated energy of any battery pack involved in the embodiments of the present application refers to the total electrical energy that the battery pack can provide to the external system after being fully charged.

[0395] It should be understood that the rated energy of the energy storage assembly may include the sum of the rated energies of each energy storage unit.

[0396] The energy storage component in the embodiment of the present application can be used to implement the relevant technical solutions regarding the energy storage component in the above-mentioned storage and charging equipment embodiments of the present application. The implementation principles and technical effects are similar and will not be repeated here.

[0397] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0398] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A storage and charging device, characterized in that: The storage and charging device comprises: an energy storage component, a charging component and a connecting component, wherein the connecting component is connected to the energy storage component through the charging component; The charging component may, when the connecting component is connected to a target electrical device, utilize the electrical energy stored in the first energy storage unit in the energy storage component to charge the target electrical device through the connecting component according to a target charging mode; wherein the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; Wherein, the energy storage component further includes a second energy storage unit, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit; The second energy storage unit can store electric energy when the load of the power grid is less than a preset load threshold; The charging component can also, when the connecting component is connected to the target electrical device, use the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the second energy storage unit to the maximum charge and discharge 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.

2. The storage and charging device according to claim 1, characterized in that: The maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

3. The storage and charging device according to claim 1, characterized in that: When the target charging mode is the first charging mode, the first energy storage unit can charge the target electrical equipment through the connecting 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.

4. The storage and charging device according to claim 3, characterized in that: When the target charging mode is the second charging mode, the first energy storage unit can charge the target electrical equipment through the connecting component at a second discharge rate not greater than a 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.

5. The storage and charging device according to any one of claims 1 to 4, characterized in that: The first energy storage unit can store electric energy when the load of the power grid is less than a preset load threshold.

6. The storage and charging device according to any one of claims 1 to 4, characterized in that: The energy storage component is connected to the DC bus; The energy storage component can specifically store the electric energy provided by the DC bus when the load of the power grid is less than a preset load threshold, and output the electric energy to the DC bus when a preset discharge condition is met.

7. The storage and charging device according to claim 6, characterized in that: The charging component is connected to the DC bus; The charging component can also use the electric energy provided by the DC bus to charge the target electric device through the connecting component according to the target charging mode when the connecting component is connected to the target electric device.

8. The storage and charging device according to claim 6, characterized in that: The connecting component is also connected to the DC bus; The connecting component can also transmit the electric energy of the target electric device to the DC bus.

9. The storage and charging device according to any one of claims 1 to 4, characterized in that: The 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 utilize the electric energy stored in the energy storage component to charge the target electrical device through the connection component according to the target charging mode.

10. A charging system for an electric device, characterized in that: The electrical equipment charging system comprises a plurality of storage and charging devices as described in any one of claims 1 to 9; The charging component in any of the storage and charging devices can, when the connection component in the storage and charging device is connected to a first target electrical device, use the electric energy stored in the first energy storage unit in the 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 charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; The energy storage component in the storage device further includes a second energy storage unit that can store electric energy when the load of the power grid is less than a preset load threshold, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit; The charging component in the storage and charging device can specifically charge the first target electrical device through the connecting component according to the target charging mode using the electric energy stored in the first energy storage unit and / or the second energy storage unit in the storage and charging device when the connecting component in the storage and charging device is connected to the first target electrical device; wherein the ratio between the rated energy and the maximum charge and discharge power of the second energy storage unit is less than or equal to a second preset ratio threshold value, and the second preset ratio threshold value is less than the first preset ratio threshold value.

11. The electric device charging system according to claim 10, characterized in that: The maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

12. The electric device charging system according to claim 10, characterized in that: When the target charging mode is the first charging mode, the first energy storage unit can charge the first target electrical equipment through the connecting 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.

13. The electrical equipment charging system according to claim 12, characterized in that: When the target charging mode is the second charging mode, the first energy storage unit can charge the first target electrical equipment through the connecting component at a second discharge rate not greater than a 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.

14. The electrical equipment charging system according to any one of claims 10 to 13, characterized in that: The first energy storage unit in each of the storage and charging devices can store electrical energy when the load of the power grid is less than a preset load threshold.

15. The electrical equipment charging system according to any one of claims 10 to 13, characterized in that: The electrical equipment charging system further comprises: a first supplementary energy storage unit connected to at least one of the storage and charging devices; The first supplementary energy storage unit can store electric energy when the load of the power grid is less than a preset load threshold, and provide electric energy to at least one of the storage and charging devices when the load of the power grid is not less than the preset load threshold; wherein the ratio between the rated energy of the first supplementary energy storage unit and the maximum charging and discharging power is greater than or equal to a first preset supplementary ratio threshold.

16. The electric device charging system according to claim 15, characterized in that: The rated energy of the first supplementary energy storage unit is related to the total input power and total rated energy corresponding to each of the storage and charging devices.

17. The electrical equipment charging system according to claim 15, characterized in that: The maximum charge and discharge power of the first supplementary energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

18. The electric device charging system according to claim 15, characterized in that: The electrical equipment charging system further comprises: a second supplementary energy storage unit connected to at least one of the storage and charging devices; The second supplementary energy storage unit can store electric energy when the load of the power grid is less than the preset load threshold, and provide electric energy to at least one of the storage and charging devices when the load of the power grid is not less than the preset load threshold and the remaining electric energy of the first supplementary energy storage unit is less than the preset electric 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.

19. The electrical equipment charging system according to any one of claims 10 to 13, characterized in that: The electrical equipment charging system further comprises: a power generation unit connected to at least one of the storage and charging devices; The power generation unit can provide electrical energy to at least one of the storage devices when the load of the power grid is not less than a preset load threshold.

20. The electric device charging system according to claim 15, characterized in that: The electrical equipment charging system further comprises: a plurality of AC charging devices; The AC charging device may charge the second target electric device connected to the AC charging device using electric energy provided by the power grid when the second target electric device is connected and the load of the power grid is less than the preset load threshold.

21. The electrical equipment charging system according to claim 20, characterized in that: 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 charging storage devices or the first supplementary energy storage unit when the load of the power grid is not less than the preset load threshold.

22. The electrical equipment charging system according to any one of claims 10 to 13, characterized in that: Each of the storage and charging devices is connected to the DC bus respectively.

23. The electrical equipment charging system according to any one of claims 10 to 13, characterized in that: The electrical equipment charging system further comprises: a monitoring device connected to each of the storage and charging devices; The monitoring device can control the charging components in any of the storage and charging devices, and when a first target electrical device is connected to a connecting component in the storage and charging device, the monitoring device can use the electric energy stored in the energy storage component in the storage and charging device to charge the first target electrical device through the connecting component according to a target charging mode.

24. A method for controlling electric energy of a storage device, characterized in that: The storage and charging device is a storage and charging device as claimed in any one of claims 1 to 9, and the method comprises: When the connecting component is connected to the target electrical device, the charging component in the storage and charging device uses the electrical energy stored in the first energy storage unit in the storage and charging device to charge the target electrical device through the connecting component according to the target charging mode; wherein the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; Wherein, the method further comprises: The second energy storage unit in the storage device stores electric energy when the load of the power grid is less than a preset load threshold; When the connecting component is connected to the target electrical device, the charging component uses the electric energy stored in the first energy storage unit and / or the second energy storage unit to charge the target electrical device through the connecting component according to the target charging mode; wherein the ratio of the rated energy of the second energy storage unit to the maximum charge and discharge 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.

25. The method according to claim 24, characterized in that The method further comprises: The first energy storage unit stores electric energy when the load of the power grid is less than a preset load threshold.

26. A method for controlling electric energy of an electric device charging system, characterized in that: The electric device charging system is an electric device charging system according to any one of claims 10 to 23, and the method comprises: When it is detected that a connecting component in any charging and storage device is connected to a first target electric device, the charging component in the charging and storage device is controlled to use the electric energy stored in the first energy storage unit in the charging and storage device to charge the first target electric device through the connecting component according to the target charging mode; wherein the ratio between the rated energy of the first energy storage unit and the maximum charge and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold value; The energy storage component in the storage device further includes a second energy storage unit capable of storing electric energy when the load of the power grid is less than a preset load threshold, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit; the method further includes: Control the charging component in the storage and charging device to utilize the electric 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 connecting component; wherein the ratio between the rated energy and the maximum charge and discharge 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.

27. The method according to claim 26, characterized in that The method further comprises: When it is detected that the load of the power grid is less than a preset load threshold, the first energy storage unit of each storage and charging device is controlled to store electric energy.

28. The method according to claim 26 or 27, characterized in that The method further comprises: Control the first supplementary energy storage unit in the charging system of the electrical equipment to store electric energy when the load of the power grid is less than a preset load threshold, and provide electric energy to at least one of the storage and charging devices when the load of the power grid is not less than the preset load threshold; wherein the ratio between the rated energy of the first supplementary energy storage unit and the maximum charging and discharging power is greater than or equal to a first preset supplementary ratio threshold.

29. The method according to claim 28, characterized in that The method further comprises: Control the second supplementary energy storage unit in the charging system of the electrical equipment to store electric energy when the load of the power grid is less than the preset load threshold, and provide electric energy to at least one of the storage and charging devices when the load of the power grid is not less than the preset load threshold and the remaining electric energy of the first supplementary energy storage unit is less than the preset electric energy threshold; wherein the ratio between the rated energy of the second supplementary energy storage unit and the maximum charging and discharging power is less than or equal to the second preset supplementary ratio threshold, and the second preset supplementary ratio threshold is less than the first preset supplementary ratio threshold.

30. The method according to any one of claims 26 or 27, characterized in that The method further comprises: Control the power generation unit in the power device charging system to provide electrical energy to at least one of the storage and charging devices when the load of the power grid is not less than a preset load threshold.

31. The method according to claim 28, characterized in that The method further comprises: When it is detected that any AC charging device in the electric device charging system is connected to a second target electric device and the load of the power grid is less than a preset load threshold, the AC charging device is controlled to use the electric energy provided by the power grid to charge the second target electric device connected to the AC charging device.

32. The method according to claim 31, characterized in that The method further comprises: When the load of the power grid is not less than the preset load threshold, the AC charging device is controlled to charge a second target electrical device connected to the AC charging device using electrical energy provided by at least one of the charging storage devices or the first supplementary energy storage unit.

33. A method for controlling electric energy, characterized in that: The method is applied to the energy storage component in the storage and charging device according to any one of claims 1 to 9, and the method comprises: The energy storage component sends the electric energy storage information of the energy storage component to the control component of the storage and charging device; In response to the conduction of the discharge path, the energy storage component uses the electric energy stored in the first energy storage unit in the energy storage component to output the target electric energy to the charging component of the storage and charging device, wherein the target electric energy is used by the charging component to charge the target electric device through the connecting component of the storage and 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 and discharge power of the first energy storage unit is greater than or equal to a first preset ratio threshold; Wherein, the energy storage component further includes a second energy storage unit, wherein the charge and discharge rate of the second energy storage unit is greater than the charge and discharge rate of the first energy storage unit; In response to the conduction of the discharge path, the energy storage component can also utilize the electric energy stored in the first energy storage unit and / or the second energy storage unit in the energy storage component to output the target electric energy to the charging component of the storage and charging device; wherein, the ratio between the rated energy of the second energy storage unit and the maximum charge and discharge power of the second energy storage unit is less than or equal to a second preset ratio threshold value, and the second preset ratio threshold value is less than the first preset ratio threshold value.

34. The method according to claim 33, characterized in that The maximum charge and discharge power of the first energy storage unit is greater than or equal to the maximum preset charge and discharge power corresponding to the target charging mode.

35. The method according to claim 33, characterized in that When the target charging mode is the first charging mode, the first energy storage unit may output target electric energy to the charging component of the storage and charging device at a first discharge rate that is not greater than a first preset discharge rate threshold; The first preset discharge rate threshold is a maximum preset discharge rate corresponding to the first charging mode.

36. The method according to claim 35, characterized in that When the target charging mode is the second charging mode, the first energy storage unit can output the target electric energy to the charging component of the storage and charging device at a second discharge rate not greater than a 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.

37. The method according to any one of claims 33 to 36, characterized in that The second energy storage unit meets the following condition: the energy density of the second energy storage unit is greater than or equal to 380 watt-hours / liter.

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