Energy storage system, energy storage method and vehicle

Abstract

The invention provides an energy storage system, an energy storage method and a vehicle, and relates to the technical field of energy storage, the energy storage system comprises a conductive layer and an insulating layer, the insulating layer is arranged between the conductive layer and a conductive shell of a vehicle body, the conductive layer, the insulating layer and the conductive shell form an energy storage capacitor, and electric energy in the energy storage capacitor can supplement electric energy of a battery of the vehicle. Therefore, the cruising ability of the vehicle is improved, and the requirement for long cruising of the vehicle is met.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and in particular to an energy storage system, an energy storage method, and a vehicle. Background Art

[0002] In the related art, the power source of a vehicle is the vehicle's battery, and the driving of the vehicle relies on the electrical energy of the battery.

[0003] However, the battery power of the vehicle is limited and cannot meet the demand for long-range driving of the vehicle. Summary of the Invention

[0004] Embodiments of the present application provide an energy storage system, an energy storage method, and a vehicle to solve the problem in the related art that the battery power of the vehicle is limited and cannot meet the demand for long-range driving of the vehicle.

[0005] In a first aspect, an embodiment of the present application provides an energy storage system, including: a conductive layer and an insulating layer; The insulating layer is disposed between the conductive layer and the conductive housing of the vehicle body, and the conductive layer, the insulating layer, and the conductive housing form an energy storage capacitor.

[0006] Optionally, the energy storage system further includes a photovoltaic panel; the photovoltaic panel is electrically connected to the energy storage capacitor, and the photovoltaic panel is used to charge the energy storage capacitor.

[0007] Optionally, a first electrode of the photovoltaic panel is electrically connected to the conductive layer, and a second electrode of the photovoltaic panel is used to be electrically connected to the conductive housing.

[0008] Optionally, the energy storage system further includes a voltage conversion module; the voltage conversion module is respectively electrically connected to the photovoltaic panel and the energy storage capacitor, and the voltage conversion module is used to be electrically connected to the vehicle's battery; wherein, the photovoltaic panel or the energy storage capacitor charges the battery through the voltage conversion module.

[0009] Optionally, the battery includes a first battery and a second battery, and the voltage of the first battery is less than the voltage of the second battery.

[0010] Optionally, the voltage conversion module includes an on-vehicle charger; the on-vehicle charger is respectively electrically connected to the photovoltaic panel and the energy storage capacitor, and the on-vehicle charger is used to be respectively electrically connected to the first battery and the second battery; the photovoltaic panel charges the first battery or the second battery through the on-vehicle charger; the energy storage capacitor charges the first battery or the second battery through the on-vehicle charger.

[0011] Optionally, the on-vehicle charger includes a power factor correction unit and a voltage conversion unit; the power factor correction unit is electrically connected to the photovoltaic panel, the energy storage capacitor, and the voltage conversion unit respectively, and the power factor correction unit is used to be electrically connected to the first battery; the voltage conversion unit is used to be electrically connected to the second battery.

[0012] Optionally, the power factor correction unit is used to control the photovoltaic panel or the energy storage capacitor to charge the first battery, and convert the voltage of the first power supply signal output by the photovoltaic panel or the second power supply signal output by the energy storage capacitor, and output a third power supply signal; the voltage conversion unit is used to convert the voltage of the third power supply signal and output a fourth power supply signal to charge the second battery.

[0013] Optionally, the on-vehicle charger further includes a first switching device and a second switching device; a first end of the first switching device is electrically connected to a first electrode of the photovoltaic panel and the conductive layer respectively, a second end of the first switching device is electrically connected to a first end of the on-vehicle charger, and a third end of the first switching device is electrically connected to a second end of the on-vehicle charger; a first end of the second switching device is electrically connected to a second electrode of the photovoltaic panel and the conductive housing respectively, a second end of the second switching device is electrically connected to a third end of the on-vehicle charger, and a third end of the second switching device is electrically connected to a fourth end of the on-vehicle charger.

[0014] Optionally, the on-vehicle charger further includes a third switching device and a fourth switching device; a first end of the third switching device is electrically connected to a first end of the on-vehicle charger, and a second end of the third switching device is electrically connected to a first electrode of the first battery; a first end of the fourth switching device is electrically connected to a third end of the on-vehicle charger, and a second end of the fourth switching device is electrically connected to a second electrode of the first battery.

[0015] Optionally, the power factor correction unit includes a first inductor, a first capacitor, and a first bridge sub-unit; a first end of the first inductor is electrically connected to a second end of the first switching device and a first end of the third switching device respectively, and a second end of the first inductor is electrically connected to a first end of the first bridge sub-unit; a first end of the first capacitor is electrically connected to a second end of the first bridge sub-unit and a first end of the voltage conversion unit respectively, and a second end of the first capacitor is electrically connected to a third end of the first bridge sub-unit and a second end of the voltage conversion unit respectively; a second end of the first bridge sub-unit is electrically connected to a third end of the first switching device, a third end of the first bridge sub-unit is electrically connected to a third end of the second switching device, and a fourth end of the first bridge sub-unit is electrically connected to a second end of the second switching device and a first end of the fourth switching device respectively.

[0016] Optionally, the first bridge sub-unit includes a fifth switching device, a sixth switching device, a seventh switching device, and an eighth switching device; a first end of the fifth switching device is electrically connected to a first end of the sixth switching device, a third end of the first switching device, and a first end of the first capacitor, respectively, and a second end of the fifth switching device is electrically connected to a second end of the first inductor and a first end of the seventh switching device, respectively; a second end of the seventh switching device is electrically connected to a second end of the eighth switching device, a third end of the second switching device, and a second end of the first capacitor, respectively; and a second end of the sixth switching device is electrically connected to a second end of the second switching device, a first end of the fourth switching device, and a first end of the eighth switching device, respectively.

[0017] Optionally, when controlling the photovoltaic panel or the energy storage capacitor to charge the first inductor and the first battery, control the first end of the first switching device to be connected to the third end of the first switching device, and control the first end of the second switching device to be connected to the third end of the second switching device, and control both the third switching device and the fourth switching device to be turned on, and control both the fifth switching device and the eighth switching device to be turned on, and control both the sixth switching device and the seventh switching device to be turned off.

[0018] Optionally, when controlling the first inductor to charge the first battery, control the first end of the first switching device to be connected to the third end of the first switching device, and control the first end of the second switching device to be connected to the third end of the second switching device, and control both the third switching device and the fourth switching device to be turned on, and control both the seventh switching device and the eighth switching device to be turned on, and control both the fifth switching device and the sixth switching device to be turned off, or: control the first end of the first switching device to be connected to the third end of the first switching device, and control the first end of the second switching device to be connected to the third end of the second switching device, and control both the third switching device and the fourth switching device to be turned on, and control both the seventh switching device and the eighth switching device to be turned off, and control both the fifth switching device and the sixth switching device to be turned on.

[0019] Optionally, when controlling the photovoltaic panel or the energy storage capacitor to charge the first inductor, control the first end of the first switching device to be connected to the second end of the first switching device, and control the first end of the second switching device to be connected to the second end of the second switching device, and control both the third switching device and the fourth switching device to be disconnected, and control both the seventh switching device and the eighth switching device to be turned on, and control both the fifth switching device and the sixth switching device to be disconnected, or: control the first end of the first switching device to be connected to the second end of the first switching device, and control the first end of the second switching device to be connected to the second end of the second switching device, and control both the third switching device and the fourth switching device to be disconnected, and control both the seventh switching device and the eighth switching device to be disconnected, and control both the fifth switching device and the sixth switching device to be turned on.

[0020] Optionally, when controlling the photovoltaic panel or the energy storage capacitor and the first inductor to jointly charge the first capacitor, control the first end of the first switching device to be connected to the second end of the first switching device, and control the first end of the second switching device to be connected to the second end of the second switching device, and control both the third switching device and the fourth switching device to be disconnected, and control both the fifth switching device and the eighth switching device to be turned on, and control both the sixth switching device and the seventh switching device to be disconnected.

[0021] Optionally, when controlling the photovoltaic panel to charge the energy storage capacitor, control both the second end and the third end of the first switching device to be disconnected from the first end of the first switching device, and control both the second end and the third end of the second switching device to be disconnected from the first end of the second switching device.

[0022] Optionally, the conductive layer is disposed on the backlight surface of the photovoltaic panel.

[0023] In a second aspect, an embodiment of the present application further provides an energy storage method, which is applied to the energy storage system as described in the first aspect. The method includes: Control the photovoltaic panel or the energy storage capacitor to charge the battery through the voltage conversion module; When the battery is fully charged, control the photovoltaic panel to charge the energy storage capacitor.

[0024] In a third aspect, an embodiment of the present application further provides a vehicle, which includes the energy storage system as described in the first aspect, or the vehicle is used to implement the steps of the energy storage method as described in the second aspect.

[0025] In summary, in the embodiments of the present application, since the insulating layer is disposed between the conductive layer and the conductive housing of the vehicle body, the conductive layer, the insulating layer and the conductive housing form an energy storage capacitor, and the electrical energy in the energy storage capacitor can supplement the electrical energy of the vehicle battery, thereby improving the endurance of the vehicle to meet the demand for long endurance of the vehicle.

[0026] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the related art, the following will briefly introduce the drawings required for the description of the embodiments.

[0028] Figure 1 The structural schematic diagram of an energy storage system provided by an embodiment of the present application; Figure 2 The structural schematic diagram of another energy storage system provided by an embodiment of the present application; Figure 3 The structural schematic diagram of yet another energy storage system provided by an embodiment of the present application; Figure 4 The structural schematic diagram of still another energy storage system provided by an embodiment of the present application; Figure 5 The structural schematic diagram of still another energy storage system provided by an embodiment of the present application; Figure 6 The step flow chart of an energy storage method provided by an embodiment of the present application.

[0029] REFERENCE SIGNS: 10 - Photovoltaic panel; 20 - Conductive layer; 30 - Insulating layer; 40 - Conductive housing; 50 - Voltage conversion module; 51 - On - vehicle charger; 51a - Power factor correction unit; 51b - Voltage conversion unit; 52 - Voltage conversion sub - module; 52a - First bridge unit; 52b - Second bridge unit; 52c - Resonant unit; A1 - First bridge sub - unit; A2 - Second bridge sub - unit; A3 - Third bridge sub - unit; B1 - Transformer sub - unit; E1 - First battery; E2 - Second battery; K1 - First switching device; K2 - Second switching device; K3 - Third switching device; K4 - Fourth switching device; K5 - Fifth switching device; K6 - Sixth switching device; K7 - Seventh switching device; K8 - Eighth switching device; K9 - Ninth switching device; K10 - Tenth switching device; K11 - Eleventh switching device; K12 - Twelfth switching device; K13 - Thirteenth switching device; K14 - Fourteenth switching device; K15 - Fifteenth switching device; K16 - Sixteenth switching device; K17 - Seventeenth switching device; K18 - Eighteenth switching device; K19 - Nineteenth switching device; K20 - Twentieth switching device; K21 - Twenty - first switching device; K22 - Twenty - second switching device; K23 - Twenty - third switching device; K24 - Twenty - fourth switching device; L1 - First inductor; L2 - Second inductor; L3 - Third inductor; L4 - Fourth inductor; L5 - Fifth inductor; L6 - Sixth inductor; C1 - First capacitor; C2 - Second capacitor; C3 - Third capacitor; C4 - Fourth capacitor; C5 - Fifth capacitor; T1 - First transformer; T2 - Second transformer. Detailed implementation manners

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0032] Refer toFigure 1 , an embodiment of the present application provides an energy storage system, including: a conductive layer 20 and an insulating layer 30; the insulating layer 30 is disposed between the conductive layer 20 and the conductive housing 40 of the vehicle body, and the conductive layer 20, the insulating layer 30 and the conductive housing 40 form an energy storage capacitor.

[0033] In the embodiment of the present application, since the insulating layer 30 is disposed between the conductive layer 20 and the conductive housing 40 of the vehicle body, and the conductive layer 20, the insulating layer 30 and the conductive housing 40 form an energy storage capacitor, the electric energy in the energy storage capacitor can supplement the electric energy of the vehicle battery, thereby improving the endurance of the vehicle to meet the demand for long endurance of the vehicle.

[0034] In some embodiments, the energy storage system further includes a photovoltaic panel 10; the photovoltaic panel 10 is electrically connected to the energy storage capacitor, and the photovoltaic panel 10 is used to charge the energy storage capacitor.

[0035] In the embodiment of the present application, the photovoltaic panel 10 is used to charge the energy storage capacitor to supplement the electric energy of the energy storage capacitor.

[0036] In some embodiments, the first electrode of the photovoltaic panel 10 is electrically connected to the conductive layer 20, and the second electrode of the photovoltaic panel 10 is used to be electrically connected to the conductive housing 40.

[0037] In the embodiment of the present application, since the first electrode of the photovoltaic panel 10 is electrically connected to the conductive layer 20, the second electrode of the photovoltaic panel 10 is electrically connected to the conductive housing 40 of the vehicle body, and the insulating layer 30 is disposed between the conductive layer 20 and the conductive housing 40, and the conductive layer 20, the insulating layer 30 and the conductive housing 40 form an energy storage capacitor, then photovoltaic power generation can be carried out through the photovoltaic panel 10, and the electric energy generated by photovoltaic power generation can be stored in the energy storage capacitor through the first electrode and the second electrode of the photovoltaic panel 10. The electric energy in the energy storage capacitor can supplement the electric energy of the vehicle battery, thereby improving the endurance of the vehicle to meet the demand for long endurance of the vehicle.

[0038] It should be noted that the photovoltaic panel 10, that is, the solar photovoltaic panel, also known as the solar cell panel, is a power generation device that generates direct current when exposed to sunlight, and is composed of photovoltaic cells made of semiconductor materials (such as silicon); the vehicle body is the part of the vehicle used to carry people and load goods; the conductive housing 40 of the vehicle body is the housing of the vehicle body made of conductive materials; in some embodiments, the vehicle can be a solar vehicle.

[0039] In some embodiments, the insulating layer 30 is a material with insulating properties filled between the two electrodes of the capacitor, and the types of the insulating layer 30 include glass, rubber, ceramic, plastic or other insulating layer 30.

[0040] In some embodiments, the conductive layer 20 is disposed on the photovoltaic panel 10. For example, the conductive layer 20 is disposed on the surface of the photovoltaic panel 10.

[0041] In some embodiments, the type of the conductive layer 20 includes aluminum, zinc, copper or other conductive materials.

[0042] In some embodiments, the type of the conductive housing 40 includes aluminum or other conductor materials, or a conductive alloy including conductor materials, etc.

[0043] In some embodiments, the first electrode of the photovoltaic panel 10 is the positive electrode, and the second electrode of the photovoltaic panel 10 is the negative electrode.

[0044] In some embodiments, the first surface of the insulating layer 30 is adjacent to the first surface of the conductive layer 20. Both the first surface of the insulating layer 30 and the first surface of the conductive layer 20 are between the second surface of the insulating layer 30 and the second surface of the conductive layer 20. The second surface of the insulating layer 30 is adjacent to the first surface of the conductive housing 40. Both the second surface of the insulating layer 30 and the first surface of the conductive housing 40 are between the first surface of the insulating layer 30 and the second surface of the conductive housing 40.

[0045] In some embodiments, the expression of the capacitance value of the energy storage capacitor is:

[0046] Wherein, is the capacitance value of the energy storage capacitor, is the dielectric constant of the energy storage capacitor, S is the overlapping area of the conductive layer 20 and the conductive housing 40, is the electrostatic constant, and d is the average distance between the conductive layer 20 and the conductive housing 40.

[0047] In some embodiments, the expression of the electric energy of the energy storage capacitor is:

[0048] Wherein, V1 is the output voltage value of the photovoltaic panel 10.

[0049] Optionally, referring to Figure 2 , in some embodiments, the energy storage system further includes a voltage conversion module 50; the voltage conversion module 50 is electrically connected to the photovoltaic panel 10 and the energy storage capacitor respectively, and the voltage conversion module 50 is used to be electrically connected to the battery of the vehicle; wherein, the photovoltaic panel 10 or the energy storage capacitor charges the battery through the voltage conversion module 50.

[0050] In the embodiments of the present application, the photovoltaic panel 10 or the energy storage capacitor charges the battery of the vehicle through the voltage conversion module 50 to supplement the electric energy of the battery of the vehicle.

[0051] Optionally, in some embodiments, the battery includes a first battery E1 and a second battery E2, and the voltage of the first battery E1 is less than the voltage of the second battery E2.

[0052] In some embodiments, the first battery E1 is used to supply power to electrical appliances in the low-voltage domain of the vehicle, such as lighting components, windshield wipers, and audio systems; the second battery E2 is used to supply power to electrical appliances in the high-voltage domain of the vehicle, such as motors and air conditioners.

[0053] In the embodiments of the present application, the first battery E1 is a battery in the low-voltage domain of the vehicle, and the second battery E2 is a battery in the high-voltage domain of the vehicle. For example, the second battery E2 is a power battery of the vehicle; the power supply of the low-voltage domain of the vehicle is realized through the first battery E1, and the power supply of the high-voltage domain of the vehicle is realized through the second battery E2.

[0054] In some embodiments, the voltage conversion module 50 is used to be electrically connected to the first battery E1 and the second battery E2 respectively; the photovoltaic panel 10 charges the first battery E1 or the second battery E2 through the voltage conversion module 50; the energy storage capacitor charges the first battery E1 or the second battery E2 through the voltage conversion module 50.

[0055] In the embodiments of the present application, the photovoltaic panel 10 charges the first battery E1 and the second battery E2 through the voltage conversion module 50 to realize the power supply supplement of the first battery E1 and the second battery E2; the energy storage capacitor charges the first battery E1 and the second battery E2 through the voltage conversion module 50 to realize the power supply supplement of the first battery E1 and the second battery E2.

[0056] Optionally, in some embodiments, the voltage conversion module 50 includes an on-board charger 51 (OBC, On Board Charger); the on-board charger 51 is electrically connected to the photovoltaic panel 10 and the energy storage capacitor respectively, and the on-board charger 51 is used to be electrically connected to the first battery E1 and the second battery E2 respectively; the photovoltaic panel 10 charges the first battery E1 or the second battery E2 through the on-board charger 51; the energy storage capacitor charges the first battery E1 or the second battery E2 through the on-board charger 51.

[0057] In the embodiments of the present application, the photovoltaic panel 10 charges the first battery E1 and the second battery E2 through the on-board charger 51 to realize the power supply supplement of the first battery E1 and the second battery E2; the energy storage capacitor charges the first battery E1 and the second battery E2 through the on-board charger 51 to realize the power supply supplement of the first battery E1 and the second battery E2.

[0058] Optionally, in some embodiments, the on-vehicle charger 51 includes a power factor correction unit 51a and a voltage conversion unit 51b; the power factor correction unit 51a is electrically connected to the photovoltaic panel 10, the energy storage capacitor, and the voltage conversion unit 51b respectively, and the power factor correction unit 51a is used to be electrically connected to the first battery E1; the voltage conversion unit 51b is used to be electrically connected to the second battery E2.

[0059] In some embodiments, the power factor correction unit 51a is a power factor correction circuit (PFC, Power Factor Correction circuit); the voltage conversion unit 51b is a bidirectional direct current to direct current (DC-DC, direct current to direct current) circuit.

[0060] In the embodiments of the present application, since the power factor correction unit 51a is electrically connected to the photovoltaic panel 10, the energy storage capacitor, and the voltage conversion unit 51b respectively, and the power factor correction unit 51a is electrically connected to the first battery E1, the power factor correction unit 51a can control the photovoltaic panel 10 or the energy storage capacitor to charge the first battery E1, and convert and output the power supply signal of the photovoltaic panel 10 or the energy storage capacitor; since the voltage conversion unit 51b is used to be electrically connected to the second battery E2, the voltage conversion unit 51b can convert the power supply signal of the power factor correction unit 51a and then charge the second battery E2.

[0061] Optionally, in some embodiments, the power factor correction unit 51a is used to control the photovoltaic panel 10 or the energy storage capacitor to charge the first battery E1, and convert the first power supply signal output by the photovoltaic panel 10, or the second power supply signal output by the energy storage capacitor, and output a third power supply signal; the voltage conversion unit 51b is used to convert the third power supply signal and output a fourth power supply signal to charge the second battery E2.

[0062] In the embodiments of the present application, the power factor correction unit 51a controls the photovoltaic panel 10 or the energy storage capacitor to charge the first battery E1 to supplement the electric energy of the first battery E1; the power factor correction unit 51a converts the first power supply signal output by the photovoltaic panel 10, or the second power supply signal output by the energy storage capacitor, and outputs a third power supply signal, and then the voltage conversion unit 51b converts the third power supply signal and outputs a fourth power supply signal to charge the second battery E2, thereby supplementing the electric energy of the second battery E2.

[0063] Optionally, in some embodiments, the on-vehicle charger 51 further includes a first switching device K1 and a second switching device K2; a first end of the first switching device K1 is electrically connected to a first electrode of the photovoltaic panel 10 and the conductive layer 20 respectively, a second end of the first switching device K1 is electrically connected to a first end of the on-vehicle charger 51, and a third end of the first switching device K1 is electrically connected to a second end of the on-vehicle charger 51; a first end of the second switching device K2 is electrically connected to a second electrode of the photovoltaic panel 10 and the conductive housing 40 respectively, a second end of the second switching device K2 is electrically connected to a third end of the on-vehicle charger 51, and a third end of the second switching device K2 is electrically connected to a fourth end of the on-vehicle charger 51.

[0064] In some embodiments, the type of the first switching device K1 includes a relay or other types of switching devices. For example, the first switching device K1 is a single-pole double-throw switching device.

[0065] In some embodiments, the type of the second switching device K2 includes a relay or other types of switching devices. For example, the second switching device K2 is a single-pole double-throw switching device.

[0066] In the embodiments of the present application, by controlling the connection between the first end and the second end of the first switching device K1, the first electrode of the photovoltaic panel 10 and the conductive layer 20 are respectively connected to the first end of the on-vehicle charger 51; by controlling the connection between the first end and the third end of the first switching device K1, the first electrode of the photovoltaic panel 10 and the conductive layer 20 are respectively connected to the second end of the on-vehicle charger 51; by controlling the connection between the first end and the second end of the second switching device K2, the second electrode of the photovoltaic panel 10 and the conductive housing 40 are respectively connected to the third end of the on-vehicle charger 51; by controlling the connection between the first end and the third end of the second switching device K2, the second electrode of the photovoltaic panel 10 and the conductive housing 40 are respectively connected to the fourth end of the on-vehicle charger 51.

[0067] Optionally, in some embodiments, the on-vehicle charger 51 further includes a third switching device K3 and a fourth switching device K4; a first end of the third switching device K3 is electrically connected to a first end of the on-vehicle charger 51, and a second end of the third switching device K3 is electrically connected to a first electrode of the first battery E1; a first end of the fourth switching device K4 is electrically connected to a third end of the on-vehicle charger 51, and a second end of the fourth switching device K4 is electrically connected to a second electrode of the first battery E1.

[0068] In some embodiments, the type of the third switching device K3 includes a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor), a relay, or other types of switching devices.

[0069] In some embodiments, the type of the fourth switching device K4 includes a MOS transistor, a relay, or other types of switching devices.

[0070] In the embodiments of the present application, by controlling the third switching device K3 to conduct, the first end of the on-vehicle charger 51 is connected to the first electrode of the first battery E1; by controlling the fourth switching device K4 to conduct, the third end of the on-vehicle charger 51 is connected to the second electrode of the first battery E1.

[0071] Optionally, referring to Figure 3 , in some embodiments, the power factor correction unit 51a includes a first inductor L1, a first capacitor C1, and a first bridge sub-unit A1; the first end of the first inductor L1 is electrically connected to the second end of the first switching device K1 and the first end of the third switching device K3 respectively, and the second end of the first inductor L1 is electrically connected to the first end of the first bridge sub-unit A1; the first end of the first capacitor C1 is electrically connected to the second end of the first bridge sub-unit A1 and the first end of the voltage conversion unit 51b respectively, and the second end of the first capacitor C1 is electrically connected to the third end of the first bridge sub-unit A1 and the second end of the voltage conversion unit 51b respectively; the second end of the first bridge sub-unit A1 is electrically connected to the third end of the first switching device K1, the third end of the first bridge sub-unit A1 is electrically connected to the third end of the second switching device K2, and the fourth end of the first bridge sub-unit A1 is electrically connected to the second end of the second switching device K2 and the first end of the fourth switching device K4 respectively.

[0072] In the embodiments of the present application, the first inductor L1 is used for filtering and energy storage, the first capacitor C1 is used for filtering and voltage stabilization, and the first bridge sub-unit A1 is used for implementing power factor correction.

[0073] Optionally, in some embodiments, the first bridge sub-unit A1 includes a fifth switching device K5, a sixth switching device K6, a seventh switching device K7, and an eighth switching device K8; a first end of the fifth switching device K5 is electrically connected to a first end of the sixth switching device K6, a third end of the first switching device K1, and a first end of the first capacitor C1 respectively, and a second end of the fifth switching device K5 is electrically connected to a second end of the first inductor L1 and a first end of the seventh switching device K7 respectively; a second end of the seventh switching device K7 is electrically connected to a second end of the eighth switching device K8, a third end of the second switching device K2, and a second end of the first capacitor C1 respectively; a second end of the sixth switching device K6 is electrically connected to a second end of the second switching device K2, a first end of the fourth switching device K4, and a first end of the eighth switching device K8 respectively.

[0074] In some embodiments, the type of the fifth switching device K5 includes a MOS transistor, a relay, or other types of switching devices.

[0075] In some embodiments, the type of the sixth switching device K6 includes a MOS transistor, a relay, or other types of switching devices.

[0076] In some embodiments, the type of the seventh switching device K7 includes a MOS transistor, a relay, or other types of switching devices.

[0077] In some embodiments, the type of the eighth switching device K8 includes a MOS transistor, a relay, or other types of switching devices.

[0078] In the embodiments of the present application, power factor correction can be achieved through the cooperation of the fifth switching device K5, the sixth switching device K6, the seventh switching device K7, and the eighth switching device K8.

[0079] Optionally, in some embodiments, when controlling the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1 and the first battery E1, control the first end of the first switching device K1 to be connected to the third end of the first switching device K1, and control the first end of the second switching device K2 to be connected to the third end of the second switching device K2, and control both the third switching device K3 and the fourth switching device K4 to be turned on, and control both the fifth switching device K5 and the eighth switching device K8 to be turned on, and control both the sixth switching device K6 and the seventh switching device K7 to be turned off.

[0080] In the embodiments of the present application, by controlling the first end of the first switching device K1 to communicate with the third end of the first switching device K1, and controlling the first end of the second switching device K2 to communicate with the third end of the second switching device K2, and controlling both the third switching device K3 and the fourth switching device K4 to be turned on, and controlling both the fifth switching device K5 and the eighth switching device K8 to be turned on, and controlling both the sixth switching device K6 and the seventh switching device K7 to be turned off, it is possible to control the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1 and the first battery E1.

[0081] Optionally, in some embodiments, when controlling the first inductor L1 to charge the first battery E1, control the first end of the first switching device K1 to communicate with the third end of the first switching device K1, and control the first end of the second switching device K2 to communicate with the third end of the second switching device K2, and control both the third switching device K3 and the fourth switching device K4 to be turned on, and control both the seventh switching device K7 and the eighth switching device K8 to be turned on, and control both the fifth switching device K5 and the sixth switching device K6 to be turned off; or: control the first end of the first switching device K1 to communicate with the third end of the first switching device K1, and control the first end of the second switching device K2 to communicate with the third end of the second switching device K2, and control both the third switching device K3 and the fourth switching device K4 to be turned on, and control both the seventh switching device K7 and the eighth switching device K8 to be turned off, and control both the fifth switching device K5 and the sixth switching device K6 to be turned on.

[0082] In the embodiments of the present application, after controlling the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1 and the first battery E1, the first inductor L1 stores electrical energy. At this time, by controlling the first end of the first switching device K1 to communicate with the third end of the first switching device K1, and controlling the first end of the second switching device K2 to communicate with the third end of the second switching device K2, and controlling both the third switching device K3 and the fourth switching device K4 to be turned on, and controlling both the seventh switching device K7 and the eighth switching device K8 to be turned on, and controlling both the fifth switching device K5 and the sixth switching device K6 to be turned off, it is possible to control the first inductor L1 to charge the first battery E1; or by controlling the first end of the first switching device K1 to communicate with the third end of the first switching device K1, and controlling the first end of the second switching device K2 to communicate with the third end of the second switching device K2, and controlling both the third switching device K3 and the fourth switching device K4 to be turned on, and controlling both the seventh switching device K7 and the eighth switching device K8 to be turned off, and controlling both the fifth switching device K5 and the sixth switching device K6 to be turned on, it is possible to control the first inductor L1 to charge the first battery E1.

[0083] It should be noted that in each charging cycle of each first battery E1, first control the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1 and the first battery E1, and then control the first inductor L1 to charge the first battery E1, so as to realize that after the power supply signal output by the photovoltaic panel 10 or the energy storage capacitor is voltage-converted, it is used to charge the first battery E1.

[0084] In some embodiments, after the voltage of the power supply signal output by the photovoltaic panel 10 or the energy storage capacitor is stepped down, it is used to charge the first battery E1; the expression of the charging cycle of the first battery E1 is:

[0085] where T is the charging cycle of the first battery E1, ton is the duration of controlling the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1 and the first battery E1 in the charging cycle of the first battery E1; toff is the duration of the first inductor L1 charging the first battery E1 in the charging cycle of the first battery E1; fsw is the charging frequency of the first battery E1.

[0086] In some embodiments, the expression of the charging voltage of the first battery E1 is: V_LV = D×V_bus = D×V1 where V_bus = V1, , V_LV is the charging voltage of the first battery E1, D is the conversion coefficient, and V_bus is the voltage of the first capacitor C1 (i.e., the bus voltage).

[0087] Optionally, in some embodiments, when controlling the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1, control the first end of the first switching device K1 to be connected to the second end of the first switching device K1, and control the first end of the second switching device K2 to be connected to the second end of the second switching device K2, and control both the third switching device K3 and the fourth switching device K4 to be disconnected, and control both the seventh switching device K7 and the eighth switching device K8 to be turned on, and control both the fifth switching device K5 and the sixth switching device K6 to be disconnected, or: control the first end of the first switching device K1 to be connected to the second end of the first switching device K1, and control the first end of the second switching device K2 to be connected to the second end of the second switching device K2, and control both the third switching device K3 and the fourth switching device K4 to be disconnected, and control both the seventh switching device K7 and the eighth switching device K8 to be disconnected, and control both the fifth switching device K5 and the sixth switching device K6 to be turned on.

[0088] In the embodiment of the present application, by controlling the first end of the first switching device K1 to be connected to the second end of the first switching device K1, and controlling the first end of the second switching device K2 to be connected to the second end of the second switching device K2, and controlling both the third switching device K3 and the fourth switching device K4 to be disconnected, and controlling both the seventh switching device K7 and the eighth switching device K8 to be turned on, and controlling both the fifth switching device K5 and the sixth switching device K6 to be disconnected, to control the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1; or by controlling the first end of the first switching device K1 to be connected to the second end of the first switching device K1, and controlling the first end of the second switching device K2 to be connected to the second end of the second switching device K2, and controlling both the third switching device K3 and the fourth switching device K4 to be disconnected, and controlling both the seventh switching device K7 and the eighth switching device K8 to be disconnected, and controlling both the fifth switching device K5 and the sixth switching device K6 to be turned on, to control the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1.

[0089] Optionally, in some embodiments, when controlling the photovoltaic panel 10 or the energy storage capacitor and the first inductor L1 to jointly charge the first capacitor C1, control the first end of the first switching device K1 to be connected to the second end of the first switching device K1, and control the first end of the second switching device K2 to be connected to the second end of the second switching device K2, and control both the third switching device K3 and the fourth switching device K4 to be disconnected, and control both the fifth switching device K5 and the eighth switching device K8 to be turned on, and control both the sixth switching device K6 and the seventh switching device K7 to be disconnected.

[0090] In the embodiment of the present application, after controlling the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1, the first inductor L1 stores electrical energy. At this time, by controlling the first end of the first switching device K1 to be connected to the second end of the first switching device K1, and controlling the first end of the second switching device K2 to be connected to the second end of the second switching device K2, and controlling both the third switching device K3 and the fourth switching device K4 to be disconnected, and controlling both the fifth switching device K5 and the eighth switching device K8 to be turned on, and controlling both the sixth switching device K6 and the seventh switching device K7 to be disconnected, to control the photovoltaic panel 10 or the energy storage capacitor and the first inductor L1 to jointly charge the first capacitor C1.

[0091] It should be noted that by first controlling the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1 in each charging cycle of the first capacitor C1, and then controlling the photovoltaic panel 10 or the energy storage capacitor and the first inductor L1 to jointly charge the first capacitor C1, to realize voltage conversion of the power supply signal output by the photovoltaic panel 10 or the energy storage capacitor and then charge the first capacitor C1.

[0092] Optionally, in some embodiments, when controlling the photovoltaic panel 10 to charge the energy storage capacitor, the second end and the third end of the first switching device K1 are both disconnected from the first end of the first switching device K1, and the second end and the third end of the second switching device K2 are both disconnected from the first end of the second switching device K2.

[0093] In the embodiments of the present application, by controlling the second end and the third end of the first switching device K1 to be both disconnected from the first end of the first switching device K1, and controlling the second end and the third end of the second switching device K2 to be both disconnected from the first end of the second switching device K2, the charging of the energy storage capacitor by the photovoltaic panel 10 is controlled.

[0094] Optionally, in some embodiments, the first end of the first inductor L1 is used to receive the power supply signal of the first phase of the alternating current.

[0095] In the embodiments of the present application, the power supply signal of the first phase of the alternating current is received through the first end of the first inductor L1, so as to cooperate with the first inductor L1, the first capacitor C1 and the first bridge sub-unit A1 to convert the single-phase alternating current into direct current, so that the voltage conversion unit 51b can convert the voltage of the direct current and then charge the second battery E2.

[0096] Optionally, referring to Figure 4 In some embodiments, the power factor correction unit 51a further includes a fifth inductor L5 and a sixth inductor L6; the first end of the fifth inductor L5 is used to receive the power supply signal of the second phase of the alternating current, and the second end of the fifth inductor L5 is electrically connected to the fifth end of the first bridge sub-unit A1; the first end of the sixth inductor L6 is used to receive the power supply signal of the third phase of the alternating current, and the second end of the sixth inductor L6 is electrically connected to the sixth end of the first bridge sub-unit A1.

[0097] In the embodiments of the present application, the power supply signal of the first phase of the alternating current is received through the first end of the first inductor L1, the power supply signal of the second phase of the alternating current is received through the first end of the fifth inductor L5, and the power supply signal of the third phase of the alternating current is received through the first end of the sixth inductor L6, so as to cooperate with the first inductor L1, the fifth inductor L5, the sixth inductor L6, the first capacitor C1 and the first bridge sub-unit A1 to convert the three-phase alternating current into direct current, so that the voltage conversion unit 51b can convert the voltage of the direct current into the charging voltage of the second battery E2 to charge the second battery E2.

[0098] Optionally, referring to Figure 5, in some embodiments, the first bridge sub-unit A1 further includes a twenty-first switching device K21, a twenty-second switching device K22, a twenty-third switching device K23, and a twenty-fourth switching device K24; a first end of the twenty-first switching device K21 is electrically connected to a first end of the twenty-second switching device K22 and a first end of the first capacitor C1 respectively, and a second end of the twenty-first switching device K21 is electrically connected to a second end of the fifth inductor L5 and a first end of the twenty-third switching device K23 respectively; a second end of the twenty-third switching device K23 is electrically connected to a second end of the twenty-fourth switching device K24 and a second end of the first capacitor C1 respectively; a second end of the twenty-second switching device K22 is electrically connected to a second end of the sixth inductor L6 and a first end of the twenty-fourth switching device K24 respectively.

[0099] In some embodiments, the type of the twenty-first switching device K21 includes a MOS transistor, a relay, or other types of switching devices.

[0100] In some embodiments, the type of the twenty-second switching device K22 includes a MOS transistor, a relay, or other types of switching devices.

[0101] In some embodiments, the type of the twenty-third switching device K23 includes a MOS transistor, a relay, or other types of switching devices.

[0102] In some embodiments, the type of the twenty-fourth switching device K24 includes a MOS transistor, a relay, or other types of switching devices.

[0103] In the embodiments of the present application, through the cooperation of the fifth switching device K5, the sixth switching device K6, the seventh switching device K7, the eighth switching device K8, the twenty-first switching device K21, the twenty-second switching device K22, the twenty-third switching device K23, and the twenty-fourth switching device K24, power factor correction can be achieved.

[0104] Optionally, in some embodiments, the voltage conversion unit 51b includes a second bridge sub-unit A2, a transformer sub-unit B1, a third bridge sub-unit A3, and a second capacitor C2; the second bridge sub-unit A2 is electrically connected to the power factor correction unit 51a and the transformer sub-unit B1 respectively; the transformer sub-unit B1 is electrically connected to the third bridge sub-unit A3; the third bridge sub-unit A3 is electrically connected to the second capacitor C2; the second capacitor C2 is used to be electrically connected to the second battery E2.

[0105] In the embodiment of the present application, through the cooperation of the second bridge sub-unit A2, the voltage transformation sub-unit B1, and the third bridge sub-unit A3, the voltage of the direct current of the first capacitor C1 is converted into the charging voltage of the second battery E2, and after being regulated by the second capacitor C2, it supplies power to the second battery E2. Among them, the voltage transformation sub-unit B1 plays an electrical isolation role, which is beneficial to filtering out clutter.

[0106] Optionally, in some embodiments, the second bridge sub-unit A2 includes a ninth switching device K9, a tenth switching device K10, an eleventh switching device K11, and a twelfth switching device K12; the first end of the ninth switching device K9 is electrically connected to the first end of the tenth switching device K10 and the power factor correction unit 51a respectively, and the second end of the ninth switching device K9 is electrically connected to the first end of the eleventh switching device K11 and the voltage transformation sub-unit B1 respectively; the second end of the eleventh switching device K11 is electrically connected to the second end of the twelfth switching device K12 and the power factor correction unit 51a respectively; the first end of the tenth switching device K10 is electrically connected to the power factor correction unit 51a, and the second end of the tenth switching device K10 is electrically connected to the first end of the twelfth switching device K12 and the voltage transformation sub-unit B1 respectively.

[0107] In some embodiments, the type of the ninth switching device K9 includes a MOS transistor, a relay, or other types of switching devices.

[0108] In some embodiments, the type of the tenth switching device K10 includes a MOS transistor, a relay, or other types of switching devices.

[0109] In some embodiments, the type of the eleventh switching device K11 includes a MOS transistor, a relay, or other types of switching devices.

[0110] In some embodiments, the type of the twelfth switching device K12 includes a MOS transistor, a relay, or other types of switching devices.

[0111] In the embodiment of the present application, through the cooperation of the ninth switching device K9, the tenth switching device K10, the eleventh switching device K11, and the twelfth switching device K12, the direct current voltage of the first capacitor C1 is converted into the alternating current voltage on the primary side of the first transformer T1.

[0112] Optionally, in some embodiments, the transformer sub-unit B1 includes a third capacitor C3, a fourth capacitor C4, a second inductor L2, a third inductor L3, and a first transformer T1; a first end of the third capacitor C3 is electrically connected to a first end of the second bridge sub-unit A2, and a second end of the third capacitor C3 is electrically connected to a first end of the second inductor L2; a second end of the second inductor L2 is electrically connected to a first end of a primary winding of the first transformer T1; a second end of the primary winding of the first transformer T1 is electrically connected to a second end of the second bridge sub-unit A2, a first end of a secondary winding of the first transformer T1 is electrically connected to a first end of the third inductor L3, and a second end of the secondary winding of the first transformer T1 is electrically connected to a first end of the third bridge sub-unit A3; a second end of the third inductor L3 is electrically connected to a first end of the fourth capacitor C4; and a second end of the fourth capacitor C4 is electrically connected to a second end of the third bridge sub-unit A3.

[0113] In the embodiments of the present application, the third capacitor C3 and the second inductor L2 form a resonant circuit for filtering; the fourth capacitor C4 and the third inductor L3 form a resonant circuit for filtering; and the first transformer T1 is used for electrical isolation and voltage transformation.

[0114] Optionally, in some embodiments, the third bridge sub-unit A3 includes a thirteenth switching device K13, a fourteenth switching device K14, a fifteenth switching device K15, and a sixteenth switching device K16; a first end of the thirteenth switching device K13 is electrically connected to a first end of the fourteenth switching device K14 and the second capacitor C2 respectively, and a second end of the thirteenth switching device K13 is electrically connected to a first end of the fifteenth switching device K15 and the transformer sub-unit B1 respectively; a second end of the fifteenth switching device K15 is electrically connected to a second end of the sixteenth switching device K16 and the second capacitor C2 respectively; a first end of the fourteenth switching device K14 is electrically connected to the second capacitor C2, and a second end of the fourteenth switching device K14 is electrically connected to a first end of the sixteenth switching device K16 and the transformer sub-unit B1 respectively.

[0115] In some embodiments, the type of the thirteenth switching device K13 includes a MOS transistor, a relay, or other types of switching devices.

[0116] In some embodiments, the type of the fourteenth switching device K14 includes a MOS transistor, a relay, or other types of switching devices.

[0117] In some embodiments, the type of the fifteenth switching device K15 includes a MOS transistor, a relay, or other types of switching devices.

[0118] In some embodiments, the type of the sixteenth switching device K16 includes a MOS transistor, a relay, or other types of switching devices.

[0119] In the embodiments of the present application, rectification is performed through the cooperation of the thirteenth switching device K13, the fourteenth switching device K14, the fifteenth switching device K15, and the sixteenth switching device K16, and the AC voltage on the secondary side of the first transformer T1 is converted into a DC voltage.

[0120] Optionally, in some embodiments, the voltage conversion module 50 further includes a voltage conversion sub-module 52; the voltage conversion sub-module 52 is used to be electrically connected to the first battery E1 and the second battery E2 respectively; wherein, the second battery E2 charges the first battery E1 through the voltage conversion sub-module 52.

[0121] In the embodiments of the present application, the second battery E2 charges the first battery E1 through the voltage conversion sub-module 52 to supplement the electrical energy of the first battery E1 with the electrical energy of the second battery E2.

[0122] Optionally, in some embodiments, the voltage conversion sub-module 52 includes a first bridge unit 52a, a second transformer T2, a second bridge unit 52b, and a resonance unit 52c; the first bridge unit 52a is electrically connected to the second transformer T2, and the first bridge unit 52a is used to be electrically connected to the second battery E2; the second transformer T2 is electrically connected to the second bridge unit 52b; the second bridge unit 52b is electrically connected to the resonance unit 52c; the resonance unit 52c is used to be electrically connected to the first battery E1.

[0123] In the embodiments of the present application, through the cooperation of the first bridge unit 52a, the second transformer T2, the second bridge unit 52b, and the resonance unit 52c, the output voltage of the second battery E2 is converted into the charging voltage of the first battery E1.

[0124] Optionally, in some embodiments, the first bridge unit 52a includes a seventeenth switching device K17, an eighteenth switching device K18, a nineteenth switching device K19, and a twentieth switching device K20; a first end of the seventeenth switching device K17 is electrically connected to a first end of the eighteenth switching device K18, and the first end of the seventeenth switching device K17 is configured to be electrically connected to a first electrode of the second battery E2; a second end of the seventeenth switching device K17 is respectively electrically connected to a first end of the nineteenth switching device K19 and a first end of a primary winding of the second transformer T2; a second end of the nineteenth switching device K19 is electrically connected to a second end of the twentieth switching device K20, and the second end of the nineteenth switching device K19 is configured to be electrically connected to a second electrode of the second battery E2; a first end of the eighteenth switching device K18 is configured to be electrically connected to the second electrode of the second battery E2, and a second end of the eighteenth switching device K18 is respectively electrically connected to a first end of the twentieth switching device K20 and a second end of the primary winding of the second transformer T2.

[0125] In some embodiments, the seventeenth switching device K17 includes a MOS transistor, a relay, or other types of switching devices.

[0126] In some embodiments, the eighteenth switching device K18 includes a MOS transistor, a relay, or other types of switching devices.

[0127] In some embodiments, the nineteenth switching device K19 includes a MOS transistor, a relay, or other types of switching devices.

[0128] In some embodiments, the twentieth switching device K20 includes a MOS transistor, a relay, or other types of switching devices.

[0129] In the embodiments of the present application, through the cooperation of the seventeenth switching device K17, the eighteenth switching device K18, the nineteenth switching device K19, and the twentieth switching device K20, the DC voltage of the second battery E2 is converted into an AC voltage on the primary side of the second transformer T2.

[0130] Optionally, in some embodiments, the second bridge unit 52b includes a first diode, a second diode, a third diode, and a fourth diode; a first end of the first diode is electrically connected to a first end of the second diode and a first end of the resonant unit 52c, respectively, and a second end of the first diode is electrically connected to a first end of the third diode and a first end of a secondary winding of the second transformer T2, respectively; a second end of the third diode is electrically connected to a second end of the fourth diode and a second end of the resonant unit 52c, respectively; a first end of the second diode is electrically connected to the first end of the resonant unit 52c, and a second end of the second diode is electrically connected to a first end of the fourth diode and a second end of the secondary winding of the second transformer T2, respectively.

[0131] In the embodiments of the present application, rectification is performed by the cooperation of the first diode, the second diode, the third diode, and the fourth diode to convert the AC voltage on the secondary side of the second transformer T2 into a DC voltage.

[0132] Optionally, in some embodiments, the resonant unit 52c includes a fourth inductor L4 and a fifth capacitor C5; a first end of the fourth inductor L4 is electrically connected to a first end of the second bridge unit 52b, a second end of the fourth inductor L4 is electrically connected to a first end of the fifth capacitor C5, and the second end of the fourth inductor L4 is used for electrically connecting to a first electrode of the first battery E1; the first end of the fifth capacitor C5 is electrically connected to the first electrode of the first battery E1, a second end of the fifth capacitor C5 is electrically connected to the second end of the second bridge unit 52b, and the second end of the fifth capacitor C5 is used for electrically connecting to a second electrode of the first battery E1.

[0133] In the embodiments of the present application, filtering is performed by a resonant circuit composed of the fourth inductor L4 and the fifth capacitor C5.

[0134] Optionally, in some embodiments, the conductive layer 20 is disposed on the backlight surface of the photovoltaic panel 10.

[0135] In some embodiments, the conductive layer 20 is coated on the backlight surface of the photovoltaic panel 10.

[0136] In the embodiments of the present application, by disposing the conductive layer 20 on the backlight surface of the photovoltaic panel 10, the space occupied by the energy storage capacitor can be effectively saved and the length of the connection line between the first electrode of the photovoltaic panel 10 and the conductive layer 20 can be reduced.

[0137] Referring to Figure 6 , the embodiments of the present application further provide an energy storage method applied to the energy storage system as described above, and the method includes the following steps: Step 101: Control the photovoltaic panel 10 or the energy storage capacitor to charge the battery through the voltage conversion module 50.

[0138] In the embodiment of the present application, the photovoltaic panel 10 or the energy storage capacitor is controlled to charge the battery through the voltage conversion module 50 to supplement the electric energy of the battery.

[0139] Step 102: When the battery is fully charged, control the photovoltaic panel 10 to charge the energy storage capacitor.

[0140] In the embodiment of the present application, by controlling the photovoltaic panel 10 to charge the energy storage capacitor when the battery is fully charged, the electric energy of the energy storage capacitor can supplement the shortage of the electric energy of the battery, improving the endurance of the vehicle.

[0141] In the embodiment of the present application, first control the photovoltaic panel 10 or the energy storage capacitor to charge the battery through the voltage conversion module 50, and then control the photovoltaic panel 10 to charge the energy storage capacitor when the battery is fully charged, thereby improving the electric energy storage capacity of the vehicle and further improving the endurance of the vehicle.

[0142] The embodiment of the present application also provides a vehicle, including the energy storage system as described in the first aspect, or the vehicle is used to implement the steps of the energy storage method as described in the second aspect.

[0143] The specific implementation process of the energy storage system in the vehicle is similar to the specific implementation process of the foregoing energy storage system and will not be elaborated here.

[0144] In the related art, the vehicle relies on photovoltaic power generation, stores the electric energy generated by photovoltaic power generation in the power battery of the vehicle, and then converts the electric energy of the power battery through voltage conversion to charge the low-voltage battery of the vehicle to supplement the electric energy of the low-voltage battery, resulting in low charging efficiency of the low-voltage battery.

[0145] In the embodiment of the present application, the photovoltaic panel 10 or the energy storage capacitor can charge the first battery E1 through the voltage conversion module 50, that is, charge the low-voltage battery, without passing through the electric energy conversion of the power battery, improving the charging efficiency of the low-voltage battery.

[0146] In the embodiment of the present application, through the control of the first switching device K1 and the second switching device K2, the switching between charging the first battery E1 and charging the second battery E2 can be realized. The electric energy generated by photovoltaic power generation can be stored in the first battery E1 of the vehicle, or can be stored in the second battery E2 of the vehicle, and the photovoltaic panel 10 can be controlled to charge the energy storage capacitor to store the electric energy generated by photovoltaic power generation in the energy storage capacitor, thereby improving the electric energy storage capacity of the vehicle and further improving the endurance of the vehicle.

[0147] In summary, in the embodiment of the present application, since the insulating layer 30 is disposed between the conductive layer 20 and the conductive housing 40 of the vehicle body, the conductive layer 20, the insulating layer 30 and the conductive housing 40 form an energy storage capacitor, and the electrical energy in the energy storage capacitor can supplement the electrical energy of the vehicle battery, thereby improving the endurance of the vehicle to meet the demand for long endurance of the vehicle.

[0148] It should be noted that in this text, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited. Functions can be performed in the order shown or discussed, and can also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods can be performed in a different order than described, and various steps can be added, omitted, or combined. Additionally, features described with reference to certain examples can be combined in other examples.

[0149] The embodiments of the present application have been described above with reference to the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An energy storage system, characterized in that: include: A conductive layer (20) and an insulating layer (30); The insulating layer (30) is arranged between the conductive layer (20) and a conductive shell (40) of the vehicle body; the conductive layer (20), the insulating layer (30) and the conductive shell (40) form an energy storage capacitor.

2. The energy storage system according to claim 1, characterized in that: The energy storage system further comprises a photovoltaic panel (10); The photovoltaic panel (10) is electrically connected to the energy storage capacitor, and the photovoltaic panel (10) is used to charge the energy storage capacitor.

3. The energy storage system according to claim 2, characterized in that: The first electrode of the photovoltaic panel (10) is electrically connected to the conductive layer (20), and the second electrode of the photovoltaic panel (10) is used to be electrically connected to the conductive shell (40).

4. The energy storage system according to claim 2, characterized in that: The energy storage system also includes a voltage conversion module (50); The voltage conversion module (50) is electrically connected to the photovoltaic panel (10) and the energy storage capacitor respectively, and the voltage conversion module (50) is used to be electrically connected to a battery of a vehicle; Wherein, the photovoltaic panel (10) or the energy storage capacitor charges the battery through the voltage conversion module (50).

5. The energy storage system according to claim 4, characterized in that: The battery comprises a first battery (E1) and a second battery (E2), wherein a voltage of the first battery (E1) is lower than a voltage of the second battery (E2).

6. The energy storage system according to claim 5, characterized in that: The voltage conversion module (50) comprises an on-board charger (51); The on-board charger (51) is electrically connected to the photovoltaic panel (10) and the energy storage capacitor respectively, and the on-board charger (51) is used to be electrically connected to the first battery (E1) and the second battery (E2) respectively; The photovoltaic panel (10) charges the first battery (E1) or the second battery (E2) through the on-board charger (51); The energy storage capacitor charges the first battery (E1) or the second battery (E2) through the on-board charger (51).

7. The energy storage system according to claim 6, characterized in that: The on-board charger (51) comprises a power factor correction unit (51a) and a voltage conversion unit (51b); The power factor correction unit (51a) is electrically connected to the photovoltaic panel (10), the energy storage capacitor and the voltage conversion unit (51b) respectively, and the power factor correction unit (51a) is used to be electrically connected to the first battery (E1); The voltage conversion unit (51b) is used to be electrically connected to the second battery (E2).

8. The energy storage system according to claim 7, characterized in that: The power factor correction unit (51a) is used to control the photovoltaic panel (10) or the energy storage capacitor to charge the first battery (E1), and to perform voltage conversion on the first power supply signal output by the photovoltaic panel (10) or the second power supply signal output by the energy storage capacitor, and output a third power supply signal; The voltage conversion unit (51b) is used to perform voltage conversion on the third power supply signal and output a fourth power supply signal to charge the second battery (E2).

9. The energy storage system according to claim 7, characterized in that: The on-board charger (51) further comprises a first switch device (K1) and a second switch device (K2); The first end of the first switch device (K1) is electrically connected to the first electrode of the photovoltaic panel (10) and the conductive layer (20), respectively; the second end of the first switch device (K1) is electrically connected to the first end of the on-board charger (51); and the third end of the first switch device (K1) is electrically connected to the second end of the on-board charger (51); The first end of the second switch device (K2) is electrically connected to the second electrode of the photovoltaic panel (10) and the conductive housing (40), respectively; the second end of the second switch device (K2) is electrically connected to the third end of the on-board charger (51); and the third end of the second switch device (K2) is electrically connected to the fourth end of the on-board charger (51).

10. The energy storage system according to claim 9, characterized in that: The on-board charger (51) further comprises a third switch device (K3) and a fourth switch device (K4); A first end of the third switch device (K3) is electrically connected to a first end of the on-board charger (51), and a second end of the third switch device (K3) is electrically connected to a first electrode of the first battery (E1); The first end of the fourth switch device (K4) is electrically connected to the third end of the on-board charger (51), and the second end of the fourth switch device (K4) is electrically connected to the second electrode of the first battery (E1).

11. The energy storage system according to claim 10, characterized in that: The power factor correction unit (51a) comprises a first inductor (L1), a first capacitor (C1) and a first bridge subunit (A1); The first end of the first inductor (L1) is electrically connected to the second end of the first switch device (K1) and the first end of the third switch device (K3), respectively, and the second end of the first inductor (L1) is electrically connected to the first end of the first bridge subunit (A1); The first end of the first capacitor (C1) is electrically connected to the second end of the first bridge subunit (A1) and the first end of the voltage conversion unit (51b) respectively, and the second end of the first capacitor (C1) is electrically connected to the third end of the first bridge subunit (A1) and the second end of the voltage conversion unit (51b) respectively; The second end of the first bridge subunit (A1) is electrically connected to the third end of the first switch device (K1), the third end of the first bridge subunit (A1) is electrically connected to the third end of the second switch device (K2), and the fourth end of the first bridge subunit (A1) is electrically connected to the second end of the second switch device (K2) and the first end of the fourth switch device (K4), respectively.

12. The energy storage system according to claim 11, characterized in that: The first bridge subunit (A1) comprises a fifth switch device (K5), a sixth switch device (K6), a seventh switch device (K7) and an eighth switch device (K8); The first end of the fifth switch device (K5) is electrically connected to the first end of the sixth switch device (K6), the third end of the first switch device (K1) and the first end of the first capacitor (C1), and the second end of the fifth switch device (K5) is electrically connected to the second end of the first inductor (L1) and the first end of the seventh switch device (K7); The second end of the seventh switch device (K7) is electrically connected to the second end of the eighth switch device (K8), the third end of the second switch device (K2) and the second end of the first capacitor (C1) respectively; The second end of the sixth switching device (K6) is electrically connected to the second end of the second switching device (K2), the first end of the fourth switching device (K4) and the first end of the eighth switching device (K8), respectively.

13. The energy storage system according to claim 12, characterized in that: When the photovoltaic panel (10) or the energy storage capacitor is controlled to charge the first inductor (L1) and the first battery (E1), the first end of the first switch device (K1) is controlled to be connected to the third end of the first switch device (K1), and the first end of the second switch device (K2) is controlled to be connected to the third end of the second switch device (K2), and the third switch device (K3) and the fourth switch device (K4) are controlled to be turned on, and the fifth switch device (K5) and the eighth switch device (K8) are controlled to be turned on, and the sixth switch device (K6) and the seventh switch device (K7) are controlled to be turned off.

14. The energy storage system according to claim 12, characterized in that: In the case of controlling the first inductor (L1) to charge the first battery (E1), controlling the first end of the first switch device (K1) to be connected to the third end of the first switch device (K1), controlling the first end of the second switch device (K2) to be connected to the third end of the second switch device (K2), controlling the third switch device (K3) and the fourth switch device (K4) to be turned on, controlling the seventh switch device (K7) and the eighth switch device (K8) to be turned on, and controlling the fifth switch device (K5) and the sixth switch device (K6) to be turned off, or: The first end of the first switch device (K1) is controlled to be connected to the third end of the first switch device (K1), and the first end of the second switch device (K2) is controlled to be connected to the third end of the second switch device (K2), and the third switch device (K3) and the fourth switch device (K4) are controlled to be turned on, and the seventh switch device (K7) and the eighth switch device (K8) are controlled to be turned off, and the fifth switch device (K5) and the sixth switch device (K6) are controlled to be turned on.

15. The energy storage system according to claim 12, characterized in that: In the case of controlling the photovoltaic panel (10) or the energy storage capacitor to charge the first inductor (L1), controlling the first end of the first switch device (K1) to be connected to the second end of the first switch device (K1), and controlling the first end of the second switch device (K2) to be connected to the second end of the second switch device (K2), and controlling the third switch device (K3) and the fourth switch device (K4) to be disconnected, and controlling the seventh switch device (K7) and the eighth switch device (K8) to be turned on, and controlling the fifth switch device (K5) and the sixth switch device (K6) to be disconnected, or: The first end of the first switch device (K1) is controlled to be connected to the second end of the first switch device (K1), and the first end of the second switch device (K2) is controlled to be connected to the second end of the second switch device (K2), and the third switch device (K3) and the fourth switch device (K4) are controlled to be disconnected, and the seventh switch device (K7) and the eighth switch device (K8) are controlled to be disconnected, and the fifth switch device (K5) and the sixth switch device (K6) are controlled to be turned on.

16. The energy storage system according to claim 12, characterized in that: When the photovoltaic panel (10) or the energy storage capacitor and the first inductor (L1) are controlled to charge the first capacitor (C1) together, the first end of the first switch device (K1) is controlled to be connected to the second end of the first switch device (K1), and the first end of the second switch device (K2) is controlled to be connected to the second end of the second switch device (K2), and the third switch device (K3) and the fourth switch device (K4) are controlled to be disconnected, and the fifth switch device (K5) and the eighth switch device (K8) are controlled to be turned on, and the sixth switch device (K6) and the seventh switch device (K7) are controlled to be disconnected.

17. The energy storage system according to claim 12, characterized in that: When the photovoltaic panel (10) is controlled to charge the energy storage capacitor, the second end of the first switch device (K1) and the third end of the first switch device (K1) are controlled to be disconnected from the first end of the first switch device (K1), and the second end of the second switch device (K2) and the third end of the second switch device (K2) are controlled to be disconnected from the first end of the second switch device (K2).

18. The energy storage system according to any one of claims 2 to 17, characterized in that: The conductive layer (20) is arranged on the backlight surface of the photovoltaic panel (10).

19. An energy storage method, characterized in that: Applied to the energy storage system according to any one of claims 4 to 17, the method comprises: Controlling the photovoltaic panel (10) or the energy storage capacitor to charge the battery via the voltage conversion module (50); When the battery is fully charged, the photovoltaic panel (10) is controlled to charge the energy storage capacitor.

20. A vehicle, characterized in that: The energy storage system comprises the energy storage system as claimed in any one of claims 1 to 18, or the vehicle is used to implement the steps of the energy storage method as claimed in claim 19.

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