An energy storage system, an energy storage method, and a vehicle

Abstract

The application 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. The electric energy in the energy storage capacitor can supplement the electric energy of a battery of the vehicle, thereby improving the endurance of the vehicle and meeting the demand for long endurance of the vehicle.

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

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

[0003] However, the battery of the vehicle has limited capacity and cannot meet the demand for long endurance of the vehicle. SUMMARY

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

[0005] In a first aspect, an embodiment of the present application provides an energy storage system, comprising: a conductive layer and an insulating layer.

[0006] The insulating layer is arranged between the conductive layer and a conductive shell of a vehicle body, and the conductive layer, the insulating layer, and the conductive shell form an energy storage capacitor.

[0007] Optionally, the energy storage system further comprises a photovoltaic panel; the photovoltaic panel is electrically connected to the energy storage capacitor, and the photovoltaic panel is configured to charge the energy storage capacitor.

[0008] Optionally, a first electrode of the photovoltaic panel is electrically connected to the conductive layer, and a second electrode of the photovoltaic panel is configured to be electrically connected to the conductive shell.

[0009] Optionally, the energy storage system further comprises a voltage conversion module; the voltage conversion module is electrically connected to the photovoltaic panel and the energy storage capacitor, respectively, and the voltage conversion module is configured to be electrically connected to a battery of the vehicle; wherein the photovoltaic panel or the energy storage capacitor charges the battery through the voltage conversion module.

[0010] Optionally, the battery comprises a first battery and a second battery, and the voltage of the first battery is less than the voltage of the second battery.

[0011] Optionally, the voltage conversion module comprises an on-board charger; the on-board charger is electrically connected to the photovoltaic panel and the energy storage capacitor, respectively, and the on-board charger is configured to be electrically connected to the first battery and the second battery, respectively; the photovoltaic panel charges the first battery or the second battery through the on-board charger; and the energy storage capacitor charges the first battery or the second battery through the on-board charger.

[0012] Optionally, the vehicle charger comprises a power factor correction unit and a voltage conversion unit; the power factor correction unit is electrically connected with the photovoltaic panel, the energy storage capacitor and the voltage conversion unit respectively, and is used to be electrically connected with the first battery; the voltage conversion unit is used to be electrically connected with the second battery.

[0013] Optionally, the power factor correction unit is used to control the photovoltaic panel or the energy storage capacitor to charge the first battery, and to perform voltage conversion on the first power supply signal output by the photovoltaic panel or the second power supply signal output by the energy storage capacitor, and to output a third power supply signal; the voltage conversion unit is used to perform voltage conversion on the third power supply signal, and to output a fourth power supply signal to charge the second battery.

[0014] Optionally, the vehicle charger further comprises a first switching device and a second switching device; a first end of the first switching device is electrically connected with a first electrode of the photovoltaic panel and the conductive layer respectively, a second end of the first switching device is electrically connected with a first end of the vehicle charger, and a third end of the first switching device is electrically connected with a second end of the vehicle charger; a first end of the second switching device is electrically connected with a second electrode of the photovoltaic panel and the conductive shell respectively, a second end of the second switching device is electrically connected with a third end of the vehicle charger, and a third end of the second switching device is electrically connected with a fourth end of the vehicle charger.

[0015] Optionally, the vehicle charger further comprises a third switching device and a fourth switching device; a first end of the third switching device is electrically connected with the first end of the vehicle charger, and a second end of the third switching device is electrically connected with a first electrode of the first battery; a first end of the fourth switching device is electrically connected with the third end of the vehicle charger, and a second end of the fourth switching device is electrically connected with a second electrode of the first battery.

[0016] Optionally, the power factor correction unit comprises a first inductor, a first capacitor and a first bridge sub-unit; a first end of the first inductor is electrically connected with the second end of the first switching device and the first end of the third switching device respectively, and a second end of the first inductor is electrically connected with a first end of the first bridge sub-unit; a first end of the first capacitor is electrically connected with 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 with 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 with a third end of the first switching device, a third end of the first bridge sub-unit is electrically connected with a third end of the second switching device, and a fourth end of the first bridge sub-unit is electrically connected with a second end of the second switching device and a first end of the fourth switching device respectively.

[0017] Optionally, the first bridge sub-unit comprises a fifth switch device, a sixth switch device, a seventh switch device and an eighth switch device; the first end of the fifth switch device is electrically connected with the first end of the sixth switch device, the third end of the first switch device and the first end of the first capacitor respectively, and the second end of the fifth switch device is electrically connected with the second end of the first inductor and the first end of the seventh switch device respectively; the second end of the seventh switch device is electrically connected with the second end of the eighth switch device, the third end of the second switch device and the second end of the first capacitor respectively; the second end of the sixth switch device is electrically connected with the second end of the second switch device, the first end of the fourth switch device and the first end of the eighth switch device respectively.

[0018] Optionally, in the case of controlling the photovoltaic panel or the energy storage capacitor to charge the first inductor and the first battery, the first end of the first switch device is controlled to be in communication with the third end of the first switch device, the first end of the second switch device is controlled to be in communication with the third end of the second switch device, the third switch device and the fourth switch device are controlled to be both turned on, the fifth switch device and the eighth switch device are controlled to be both turned on, and the sixth switch device and the seventh switch device are controlled to be both turned off.

[0019] Optionally, in the case of controlling the first inductor to charge the first battery, the first end of the first switch device is controlled to be in communication with the third end of the first switch device, the first end of the second switch device is controlled to be in communication with the third end of the second switch device, the third switch device and the fourth switch device are controlled to be both turned on, the seventh switch device and the eighth switch device are controlled to be both turned on, and the fifth switch device and the sixth switch device are controlled to be both turned off, or: the first end of the first switch device is controlled to be in communication with the third end of the first switch device, the first end of the second switch device is controlled to be in communication with the third end of the second switch device, the third switch device and the fourth switch device are controlled to be both turned on, the seventh switch device and the eighth switch device are controlled to be both turned off, and the fifth switch device and the sixth switch device are controlled to be both turned on.

[0020] Optionally, in the case of controlling the photovoltaic panel or the energy storage capacitor to charge the first inductor, the first end of the first switch device is controlled to be in communication with the second end of the first switch device, the first end of the second switch device is controlled to be in communication with the second end of the second switch device, the third switch device and the fourth switch device are controlled to be both disconnected, the seventh switch device and the eighth switch device are controlled to be both turned on, and the fifth switch device and the sixth switch device are controlled to be both disconnected, or: the first end of the first switch device is controlled to be in communication with the second end of the first switch device, the first end of the second switch device is controlled to be in communication with the second end of the second switch device, the third switch device and the fourth switch device are controlled to be both disconnected, the seventh switch device and the eighth switch device are controlled to be both disconnected, and the fifth switch device and the sixth switch device are controlled to be both turned on.

[0021] Optionally, in the case of controlling the photovoltaic panel or the energy storage capacitor, and the first inductor to jointly charge the first capacitor, the first end of the first switch device is controlled to be in communication with the second end of the first switch device, the first end of the second switch device is controlled to be in communication with the second end of the second switch device, the third switch device and the fourth switch device are controlled to be both disconnected, the fifth switch device and the eighth switch device are controlled to be both turned on, and the sixth switch device and the seventh switch device are controlled to be both disconnected.

[0022] Optionally, in the case of controlling the photovoltaic panel to charge the energy storage capacitor, the second end of the first switch device and the third end of the first switch device are both controlled to be disconnected from the first end of the first switch device, and the second end of the second switch device and the third end of the second switch device are both controlled to be disconnected from the first end of the second switch device.

[0023] Optionally, the conductive layer is arranged on the back surface of the photovoltaic panel.

[0024] In a second aspect, the embodiments of the present application further provide an energy storage method, applied to the energy storage system of the first aspect, and the method comprises:

[0025] The photovoltaic panel or the energy storage capacitor is controlled to charge the battery through the voltage conversion module;

[0026] In the case of the battery being fully charged, the photovoltaic panel is controlled to charge the energy storage capacitor.

[0027] In a third aspect, the embodiments of the present application further provide a vehicle, comprising the energy storage system of the first aspect, or the vehicle is used to implement the steps of the energy storage method of the second aspect.

[0028] In summary, in the embodiment of the present application, the insulating layer is arranged between the conductive layer and the conductive shell of the vehicle body, and the conductive layer, the insulating layer and the conductive shell form an energy storage capacitor. The electric energy in the energy storage capacitor can supplement the battery electric energy of the vehicle, thereby improving the endurance of the vehicle to meet the long endurance requirement of the vehicle.

[0029] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technical solutions, the following will briefly introduce the drawings needed to be used in the embodiments.

[0031] Figure 1 A structural schematic diagram of an energy storage system provided by the embodiment of the present application is shown in the figure.

[0032] Figure 2 Another structural schematic diagram of an energy storage system provided by the embodiment of the present application is shown in the figure.

[0033] Figure 3 Another structural schematic diagram of an energy storage system provided by the embodiment of the present application is shown in the figure.

[0034] Figure 4 Another structural schematic diagram of an energy storage system provided by the embodiment of the present application is shown in the figure.

[0035] Figure 5 Another structural schematic diagram of an energy storage system provided by the embodiment of the present application is shown in the figure.

[0036] Figure 6 A step flow chart of an energy storage method provided by the embodiment of the present application is shown in the figure.

[0037] REFERENCE NUMERALS:

[0038] 10 - photovoltaic panel; 20 - conductive layer; 30 - insulating layer; 40 - conductive housing; 50 - voltage conversion module; 51 - on-board charger; 51a - power factor correction unit; 51b - voltage conversion unit; 52 - voltage conversion sub-module; 52a - first bridge unit; 52b - second bridge unit; 52c - resonance unit; Al - first bridge sub-unit; A2 - second bridge sub-unit; A3 - third bridge sub-unit; Bl - transformer sub-unit; El - first cell; E2 - second cell; 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; LI - first inductor; L2 - second inductor; L3 - third inductor; L4 - fourth inductor; L5 - fifth inductor; L6 - sixth inductor; Cl - first capacitor; C2 - second capacitor; C3 - third capacitor; C4 - fourth capacitor; C5 - fifth capacitor; T1 - first transformer; T2 - second transformer. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0041] ReferenceFigure 1 The embodiment of the present application provides a kind of energy storage system, comprising: conductive layer 20 and insulating layer 30;The insulating layer 30 is arranged between the conductive layer 20 and the conductive shell 40 of vehicle body, and the conductive layer 20, the insulating layer 30 and the conductive shell 40 form energy storage capacitor.

[0042] In the embodiment of the present application, since the insulating layer 30 is arranged between the conductive layer 20 and the conductive shell 40 of vehicle body, the conductive layer 20, the insulating layer 30 and the conductive shell 40 form energy storage capacitor, and the electric energy in the energy storage capacitor can supplement the battery electric energy of vehicle, thereby improving the endurance of vehicle to meet the demand of long endurance of vehicle.

[0043] In some embodiments, the energy storage system further comprises a photovoltaic panel 10;The photovoltaic panel 10 is electrically connected with the energy storage capacitor, and the photovoltaic panel 10 is used to charge the energy storage capacitor.

[0044] 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 energy storage capacitor.

[0045] In some embodiments, the first electrode of the photovoltaic panel 10 is electrically connected with the conductive layer 20, and the second electrode of the photovoltaic panel 10 is used to be electrically connected with the conductive shell 40.

[0046] In the embodiment of the present application, since the first electrode of the photovoltaic panel 10 is electrically connected with the conductive layer 20, the second electrode of the photovoltaic panel 10 is electrically connected with the conductive shell 40 of vehicle body, and the insulating layer 30 is arranged between the conductive layer 20 and the conductive shell 40, the conductive layer 20, the insulating layer 30 and the conductive shell 40 form 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 is stored in the energy storage capacitor through the first electrode and the second electrode of the photovoltaic panel 10, and the electric energy in the energy storage capacitor can supplement the battery electric energy of vehicle, thereby improving the endurance of vehicle to meet the demand of long endurance of vehicle.

[0047] It should be noted that the photovoltaic panel 10, i.e. solar photovoltaic panel, also known as solar panel, is a power generation device that generates direct current under sunlight, which is composed of photovoltaic cells made of semiconductor materials (such as silicon);The vehicle body is the part of the vehicle for carrying people and loading goods;The conductive shell 40 of the vehicle body is the shell of the vehicle body made of conductive material;In some embodiments, the vehicle can be a solar car.

[0048] In some embodiments, the insulating layer 30 is a material with insulating properties filled between the two plates of the capacitor, and the type of insulating layer 30 includes glass, rubber, ceramic, plastic or other insulating layer 30.

[0049] 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.

[0050] In some embodiments, the type of the conductive layer 20 includes aluminum, zinc, copper or other conductive materials.

[0051] In some embodiments, the type of the conductive shell 40 includes aluminum or other conductor materials, or a conductive alloy including a conductor material, etc.

[0052] In some embodiments, the first electrode of the photovoltaic panel 10 is a positive electrode, and the second electrode of the photovoltaic panel 10 is a negative electrode.

[0053] In some embodiments, the first surface of the insulating layer 30 is adjacent to the first surface of the conductive layer 20, and the first surface of the insulating layer 30 and the first surface of the conductive layer 20 are both 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 shell 40, and the second surface of the insulating layer 30 and the first surface of the conductive shell 40 are both between the first surface of the insulating layer 30 and the second surface of the conductive shell 40.

[0054] In some embodiments, the expression of the capacitance value of the energy storage capacitor is:

[0055]

[0056] 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 shell 40, is the electrostatic force constant, and d is the average distance between the conductive layer 20 and the conductive shell 40.

[0057] In some embodiments, the expression of the energy of the energy storage capacitor is:

[0058]

[0059] wherein, V1 is the output voltage value of the photovoltaic panel 10.

[0060] Optionally, referring to Figure 2 In some embodiments, the energy storage system further comprises a voltage conversion module 50; the voltage conversion module 50 is electrically connected with the photovoltaic panel 10 and the energy storage capacitor respectively, and the voltage conversion module 50 is used to be electrically connected with the battery of the vehicle; wherein the photovoltaic panel 10 or the energy storage capacitor charges the battery through the voltage conversion module 50.

[0061] 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 energy of the battery of the vehicle.

[0062] Optionally, in some embodiments, the battery includes a first battery E1 and a second battery E2, the voltage of the first battery E1 is less than the voltage of the second battery E2.

[0063] In some embodiments, the first battery E1 is used to power the low-voltage domain electrical devices of the vehicle, such as lighting components, windshield wipers, audio, etc.; the second battery E2 is used to power the high-voltage domain electrical devices of the vehicle, such as motors, air conditioners, etc.

[0064] In the embodiments of the present application, the first battery E1 is the low-voltage domain battery of the vehicle, and the second battery E2 is the high-voltage domain battery of the vehicle, for example, the second battery E2 is the power battery of the vehicle; the low-voltage domain power supply of the vehicle is realized by the first battery E1, and the high-voltage domain power supply of the vehicle is realized by the second battery E2.

[0065] In some embodiments, the voltage conversion module 50 is used to be electrically connected with 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.

[0066] 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, so as to realize the electrical energy 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, so as to realize the electrical energy supplement of the first battery E1 and the second battery E2.

[0067] Optionally, in some embodiments, the voltage conversion module 50 includes an on-board charger 51 (OBC); the on-board charger 51 is electrically connected with the photovoltaic panel 10 and the energy storage capacitor respectively, and is used to be electrically connected with 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.

[0068] 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, so as to realize the electrical energy 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, so as to realize the electrical energy supplement of the first battery E1 and the second battery E2.

[0069] Optionally, in some embodiments, the vehicle charger 51 comprises a power factor correction unit 51a and a voltage conversion unit 51b; the power factor correction unit 51a is electrically connected with 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 with the first battery E1; the voltage conversion unit 51b is electrically connected with the second battery E2.

[0070] In some embodiments, the power factor correction unit 51a is a power factor correction circuit (PFC), and the voltage conversion unit 51b is a bidirectional direct current to direct current (DC-DC) circuit.

[0071] In the embodiments of the present application, since the power factor correction unit 51a is electrically connected with 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 with 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 can perform voltage conversion on the power supply signal of the photovoltaic panel 10 or the energy storage capacitor and output the voltage conversion result; since the voltage conversion unit 51b is electrically connected with the second battery E2, the voltage conversion unit 51b can perform voltage conversion on the power supply signal of the power factor correction unit 51a and charge the second battery E2.

[0072] Optionally, in some embodiments, the power factor correction unit 51a is configured to control the photovoltaic panel 10 or the energy storage capacitor to charge the first battery E1, and 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 configured to perform voltage conversion on the third power supply signal and output a fourth power supply signal to charge the second battery E2.

[0073] 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 performs 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 outputs a third power supply signal, and then the voltage conversion unit 51b performs voltage conversion on 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.

[0074] Optionally, in some embodiments, the vehicle charger 51 further comprises a first switching device K1 and a second switching device K2; a first end of the first switching device K1 is electrically connected with the 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 with a first end of the vehicle charger 51, and a third end of the first switching device K1 is electrically connected with a second end of the vehicle charger 51; a first end of the second switching device K2 is electrically connected with the second electrode of the photovoltaic panel 10 and the conductive shell 40 respectively, a second end of the second switching device K2 is electrically connected with a third end of the vehicle charger 51, and a third end of the second switching device K2 is electrically connected with a fourth end of the vehicle charger 51.

[0075] 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.

[0076] 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.

[0077] In the embodiments of the present application, by controlling the first end of the first switching device K1 to be in communication with the second end of the first switching device K1, the first electrode of the photovoltaic panel 10 and the conductive layer 20 are respectively in communication with the first end of the vehicle charger 51; by controlling the first end of the first switching device K1 to be in communication with the third end of the first switching device K1, the first electrode of the photovoltaic panel 10 and the conductive layer 20 are respectively in communication with the second end of the vehicle charger 51; by controlling the first end of the second switching device K2 to be in communication with the second end of the second switching device K2, the second electrode of the photovoltaic panel 10 and the conductive shell 40 are respectively in communication with the third end of the vehicle charger 51; by controlling the first end of the second switching device K2 to be in communication with the third end of the second switching device K2, the second electrode of the photovoltaic panel 10 and the conductive shell 40 are respectively in communication with the fourth end of the vehicle charger 51.

[0078] Optionally, in some embodiments, the vehicle charger 51 further comprises a third switching device K3 and a fourth switching device K4; a first end of the third switching device K3 is electrically connected with the first end of the vehicle charger 51, and a second end of the third switching device K3 is electrically connected with the first electrode of the first battery E1; a first end of the fourth switching device K4 is electrically connected with the third end of the vehicle charger 51, and a second end of the fourth switching device K4 is electrically connected with the second electrode of the first battery E1.

[0079] In some embodiments, the type of the third switching device K3 includes a MOS tube (Metal-Oxide-Semiconductor Field-Effect Transistor), a relay or other types of switching devices.

[0080] In some embodiments, the type of the fourth switching device K4 includes a MOS tube, a relay or other types of switching devices.

[0081] In the embodiments of the present application, the first end of the on-board charger 51 is communicated with the first electrode of the first battery E1 by controlling the third switching device K3 to be turned on, and the third end of the on-board charger 51 is communicated with the second electrode of the first battery E1 by controlling the fourth switching device K4 to be turned on.

[0082] 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 with 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 with the first end of the first bridge sub-unit A1; the first end of the first capacitor C1 is electrically connected with 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 with 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 with the third end of the first switching device K1, the third end of the first bridge sub-unit A1 is electrically connected with the third end of the second switching device K2, and the fourth end of the first bridge sub-unit A1 is electrically connected with the second end of the second switching device K2 and the first end of the fourth switching device K4 respectively.

[0083] 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 realizing power factor correction.

[0084] Optionally, in some embodiments, the first bridge subunit A1 comprises 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 with 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, a second end of the fifth switching device K5 is electrically connected with 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 with 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 with 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.

[0085] In some embodiments, the type of the fifth switching device K5 comprises a MOS tube, a relay or other types of switching devices.

[0086] In some embodiments, the type of the sixth switching device K6 comprises a MOS tube, a relay or other types of switching devices.

[0087] In some embodiments, the type of the seventh switching device K7 comprises a MOS tube, a relay or other types of switching devices.

[0088] In some embodiments, the type of the eighth switching device K8 comprises a MOS tube, a relay or other types of switching devices.

[0089] In the embodiments of the present application, the cooperation of the fifth switching device K5, the sixth switching device K6, the seventh switching device K7 and the eighth switching device K8 can realize power factor correction.

[0090] Optionally, in some embodiments, 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 switching device K1 is controlled to be in communication with the third end of the first switching device K1, the first end of the second switching device K2 is controlled to be in communication with the third end of the second switching device K2, the third switching device K3 and the fourth switching device K4 are controlled to be both turned on, the fifth switching device K5 and the eighth switching device K8 are controlled to be both turned on, and the sixth switching device K6 and the seventh switching device K7 are controlled to be both turned off.

[0091] In the embodiment of the present application, by controlling the first end of the first switching device K1 to be in communication with the third end of the first switching device K1, and controlling the first end of the second switching device K2 to be in communication with the third end of the second switching device K2, and controlling the third switching device K3 and the fourth switching device K4 to be both turned on, and controlling the fifth switching device K5 and the eighth switching device K8 to be both turned on, and controlling the sixth switching device K6 and the seventh switching device K7 to be both turned off, the charging of the photovoltaic panel 10 or the energy storage capacitor to the first inductor L1 and the first battery E1 can be controlled.

[0092] Alternatively, in some embodiments, in the case of controlling the first inductor L1 to charge the first battery E1, the first end of the first switching device K1 is controlled to be in communication with the third end of the first switching device K1, and the first end of the second switching device K2 is controlled to be in communication with the third end of the second switching device K2, and the third switching device K3 and the fourth switching device K4 are controlled to be both turned on, and the seventh switching device K7 and the eighth switching device K8 are controlled to be both turned on, and the fifth switching device K5 and the sixth switching device K6 are controlled to be both turned off, or: the first end of the first switching device K1 is controlled to be in communication with the third end of the first switching device K1, and the first end of the second switching device K2 is controlled to be in communication with the third end of the second switching device K2, and the third switching device K3 and the fourth switching device K4 are controlled to be both turned on, and the seventh switching device K7 and the eighth switching device K8 are controlled to be both turned off, and the fifth switching device K5 and the sixth switching device K6 are controlled to be both turned on.

[0093] In the embodiment of the present application, after the photovoltaic panel 10 or the energy storage capacitor is controlled to charge the first inductor L1 and the first battery E1, the first inductor L1 stores electrical energy, then at this time, by controlling the first end of the first switching device K1 to be in communication with the third end of the first switching device K1, and controlling the first end of the second switching device K2 to be in communication with the third end of the second switching device K2, and controlling the third switching device K3 and the fourth switching device K4 to be both turned on, and controlling the seventh switching device K7 and the eighth switching device K8 to be both turned on, and controlling the fifth switching device K5 and the sixth switching device K6 to be both turned off, the first inductor L1 can be controlled to charge the first battery E1; or by controlling the first end of the first switching device K1 to be in communication with the third end of the first switching device K1, and controlling the first end of the second switching device K2 to be in communication with the third end of the second switching device K2, and controlling the third switching device K3 and the fourth switching device K4 to be both turned on, and controlling the seventh switching device K7 and the eighth switching device K8 to be both turned off, and controlling the fifth switching device K5 and the sixth switching device K6 to be both turned on, the first inductor L1 can be controlled to charge the first battery E1.

[0094] It should be noted that the photovoltaic panel 10 or the energy storage capacitor is controlled to charge the first inductor L1 and the first battery E1 first, and then the first inductor L1 is controlled to charge the first battery E1 in each charging period of the first battery E1, so as to charge the first battery E1 by voltage conversion of the power supply signal output by the photovoltaic panel 10 or the energy storage capacitor.

[0095] In some embodiments, the voltage of the power supply signal output by the photovoltaic panel 10 or the energy storage capacitor is stepped down to charge the first battery E1; and the expression of the charging period of the first battery E1 is:

[0096]

[0097] wherein T is the charging period of the first battery E1, ton is the time length for controlling the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1 and the first battery E1 in the charging period of the first battery E1; toff is the time length for controlling the first inductor L1 to charge the first battery E1 in the charging period of the first battery E1; and fsw is the charging frequency of the first battery E1.

[0098] In some embodiments, the expression of the charging voltage of the first battery E1 is:

[0099] V_LV=D×V_bus=D×V1

[0100] wherein 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).

[0101] Optionally, in some embodiments, when the photovoltaic panel 10 or the energy storage capacitor is controlled to charge the first inductor L1, the first end of the first switching device K1 is controlled to be in communication with the second end of the first switching device K1, the first end of the second switching device K2 is controlled to be in communication with the second end of the second switching device K2, the third switching device K3 and the fourth switching device K4 are both controlled to be disconnected, the seventh switching device K7 and the eighth switching device K8 are both controlled to be turned on, and the fifth switching device K5 and the sixth switching device K6 are both controlled to be disconnected, or: the first end of the first switching device K1 is controlled to be in communication with the second end of the first switching device K1, the first end of the second switching device K2 is controlled to be in communication with the second end of the second switching device K2, the third switching device K3 and the fourth switching device K4 are both controlled to be disconnected, the seventh switching device K7 and the eighth switching device K8 are both controlled to be disconnected, and the fifth switching device K5 and the sixth switching device K6 are both controlled to be turned on.

[0102] In the embodiment of the present application, the first end of the first switching device K1 is in communication with the second end of the first switching device K1, the first end of the second switching device K2 is in communication with the second end of the second switching device K2, the third switching device K3 and the fourth switching device K4 are both disconnected, the seventh switching device K7 and the eighth switching device K8 are both turned on, and the fifth switching device K5 and the sixth switching device K6 are both disconnected, so as to control the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1; or the first end of the first switching device K1 is in communication with the second end of the first switching device K1, the first end of the second switching device K2 is in communication with the second end of the second switching device K2, the third switching device K3 and the fourth switching device K4 are both disconnected, the seventh switching device K7 and the eighth switching device K8 are both disconnected, and the fifth switching device K5 and the sixth switching device K6 are both turned on, so as to control the photovoltaic panel 10 or the energy storage capacitor to charge the first inductor L1.

[0103] Optionally, in some embodiments, 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 switching device K1 is in communication with the second end of the first switching device K1, the first end of the second switching device K2 is in communication with the second end of the second switching device K2, the third switching device K3 and the fourth switching device K4 are both disconnected, the fifth switching device K5 and the eighth switching device K8 are both turned on, and the sixth switching device K6 and the seventh switching device K7 are both disconnected.

[0104] In the embodiment of the present application, after the photovoltaic panel 10 or the energy storage capacitor is controlled to charge the first inductor L1, the first inductor L1 stores electric energy, at this time, the first end of the first switching device K1 is in communication with the second end of the first switching device K1, the first end of the second switching device K2 is in communication with the second end of the second switching device K2, the third switching device K3 and the fourth switching device K4 are both disconnected, the fifth switching device K5 and the eighth switching device K8 are both turned on, and the sixth switching device K6 and the seventh switching device K7 are both disconnected, so as to control the photovoltaic panel 10 or the energy storage capacitor and the first inductor L1 to charge the first capacitor C1 together.

[0105] It should be noted that, in each charging period of the first capacitor C1, the photovoltaic panel 10 or the energy storage capacitor is first controlled to charge the first inductor L1, and then the photovoltaic panel 10 or the energy storage capacitor and the first inductor L1 are controlled to charge the first capacitor C1 together, so as to charge the first capacitor C1 by voltage conversion of the power supply signal output by the photovoltaic panel 10 or the energy storage capacitor.

[0106] Optionally, in some embodiments, when the photovoltaic panel 10 is controlled to charge the energy storage capacitor, the second end of the first switching device K1 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 of the second switching device K2 and the third end of the second switching device K2 are both disconnected from the first end of the second switching device K2.

[0107] In the embodiment of the present application, by controlling the second end of the first switching device K1 and the third end of the first switching device K1 to be disconnected from the first end of the first switching device K1, and controlling the second end of the second switching device K2 and the third end of the second switching device K2 to be disconnected from the first end of the second switching device K2, the photovoltaic panel 10 is controlled to charge the energy storage capacitor.

[0108] Optionally, in some embodiments, the first end of the first inductor L1 is configured to receive a power supply signal of a first phase of the alternating current.

[0109] In the embodiment of the present application, by receiving the power supply signal of the first phase of the alternating current at the first end of the first inductor L1, the single-phase alternating current is converted into direct current by the cooperation of the first inductor L1, the first capacitor C1 and the first bridge subunit A1, so as to supply the voltage conversion unit 51b to convert the voltage of the direct current into the charging voltage of the second battery E2.

[0110] 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 configured to receive a power supply signal of a 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 subunit A1; the first end of the sixth inductor L6 is configured to receive a power supply signal of a 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 subunit A1.

[0111] In the embodiment of the present application, by receiving the power supply signal of the first phase of the alternating current at the first end of the first inductor L1, receiving the power supply signal of the second phase of the alternating current at the first end of the fifth inductor L5, and receiving the power supply signal of the third phase of the alternating current at the first end of the sixth inductor L6, the three-phase alternating current is converted into direct current by the cooperation of the first inductor L1, the fifth inductor L5, the sixth inductor L6, the first capacitor C1 and the first bridge subunit A1, so as to supply the voltage conversion unit 51b to convert the voltage of the direct current into the charging voltage of the second battery E2, and charge the second battery E2.

[0112] Optionally, referring to Figure 5In some embodiments, the first bridge sub-unit A1 further includes a twenty-first switch device K21, a twenty-second switch device K22, a twenty-third switch device K23 and a twenty-fourth switch device K24; a first end of the twenty-first switch device K21 is electrically connected with a first end of the twenty-second switch device K22 and a first end of the first capacitor C1 respectively, and a second end of the twenty-first switch device K21 is electrically connected with a second end of the fifth inductor L5 and a first end of the twenty-third switch device K23 respectively; a second end of the twenty-third switch device K23 is electrically connected with a second end of the twenty-fourth switch device K24 and a second end of the first capacitor C1 respectively; a second end of the twenty-second switch device K22 is electrically connected with a second end of the sixth inductor L6 and a first end of the twenty-fourth switch device K24 respectively.

[0113] In some embodiments, the type of the twenty-first switch device K21 includes a MOS tube, a relay or other types of switch devices.

[0114] In some embodiments, the type of the twenty-second switch device K22 includes a MOS tube, a relay or other types of switch devices.

[0115] In some embodiments, the type of the twenty-third switch device K23 includes a MOS tube, a relay or other types of switch devices.

[0116] In some embodiments, the type of the twenty-fourth switch device K24 includes a MOS tube, a relay or other types of switch devices.

[0117] In the embodiments of the present application, through the cooperation of the fifth switch device K5, the sixth switch device K6, the seventh switch device K7 and the eighth switch device K8, the twenty-first switch device K21, the twenty-second switch device K22, the twenty-third switch device K23 and the twenty-fourth switch device K24, power factor correction can be realized.

[0118] 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 with the power factor correction unit 51a and the transformer sub-unit B1 respectively; the transformer sub-unit B1 is electrically connected with the third bridge sub-unit A3; the third bridge sub-unit A3 is electrically connected with the second capacitor C2; and the second capacitor C2 is used to be electrically connected with the second battery E2.

[0119] In the embodiment of the present application, the DC voltage of the first capacitor C1 is converted into the charging voltage of the second battery E2 by the cooperation of the second bridge subunit A2, the voltage conversion subunit B1 and the third bridge subunit A3, and then the second battery E2 is powered after the voltage is stabilized by the second capacitor C2, wherein the voltage conversion subunit B1 plays an electrical isolation role, which is conducive to filtering out noise.

[0120] Optionally, in some embodiments, the second bridge subunit 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 with 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 with the first end of the eleventh switching device K11 and the voltage conversion subunit B1 respectively; the second end of the eleventh switching device K11 is electrically connected with 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 with the power factor correction unit 51a, and the second end of the tenth switching device K10 is electrically connected with the first end of the twelfth switching device K12 and the voltage conversion subunit B1 respectively.

[0121] In some embodiments, the type of the ninth switching device K9 includes a MOS tube, a relay or other types of switching devices.

[0122] In some embodiments, the type of the tenth switching device K10 includes a MOS tube, a relay or other types of switching devices.

[0123] In some embodiments, the type of the eleventh switching device K11 includes a MOS tube, a relay or other types of switching devices.

[0124] In some embodiments, the type of the twelfth switching device K12 includes a MOS tube, a relay or other types of switching devices.

[0125] In the embodiment of the present application, the DC voltage of the first capacitor C1 is converted into the AC voltage of the primary side of the first transformer T1 by the cooperation of the ninth switching device K9, the tenth switching device K10, the eleventh switching device K11 and the twelfth switching device K12.

[0126] Optionally, in some embodiments, the transformer subunit B1 comprises 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 with a first end of the second bridge subunit A2, a second end of the third capacitor C3 is electrically connected with a first end of the second inductor L2; a second end of the second inductor L2 is electrically connected with 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 with a second end of the second bridge subunit A2, a first end of a secondary winding of the first transformer T1 is electrically connected with a first end of the third inductor L3, a second end of the secondary winding of the first transformer T1 is electrically connected with a first end of the third bridge subunit A3; a second end of the third inductor L3 is electrically connected with a first end of the fourth capacitor C4; a second end of the fourth capacitor C4 is electrically connected with a second end of the third bridge subunit A3.

[0127] In the embodiments of the present application, the third capacitor C3 and the second inductor L2 constitute a resonance circuit for filtering; the fourth capacitor C4 and the third inductor L3 constitute a resonance circuit for filtering; the first transformer T1 is used for electrical isolation and voltage transformation.

[0128] Optionally, in some embodiments, the third bridge subunit A3 comprises 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 with a first end of the fourteenth switching device K14 and the second capacitor C2 respectively, a second end of the thirteenth switching device K13 is electrically connected with a first end of the fifteenth switching device K15 and the transformer subunit B1 respectively; a second end of the fifteenth switching device K15 is electrically connected with 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 with the second capacitor C2, a second end of the fourteenth switching device K14 is electrically connected with a first end of the sixteenth switching device K16 and the transformer subunit B1 respectively.

[0129] In some embodiments, the type of the thirteenth switching device K13 includes a MOS tube, a relay or other types of switching devices.

[0130] In some embodiments, the type of the fourteenth switching device K14 includes a MOS tube, a relay or other types of switching devices.

[0131] In some embodiments, the type of the fifteenth switching device K15 includes a MOS tube, a relay or other types of switching devices.

[0132] In some embodiments, the type of the sixteenth switch device K16 includes a MOS tube, a relay or other types of switch devices.

[0133] In the embodiments of the present application, the AC voltage at the secondary side of the first transformer T1 is converted into a DC voltage by the cooperation of the thirteenth switch device K13, the fourteenth switch device K14, the fifteenth switch device K15 and the sixteenth switch device K16.

[0134] Optionally, in some embodiments, the voltage conversion module 50 further includes a voltage conversion submodule 52; the voltage conversion submodule 52 is configured to be electrically connected with the first battery E1 and the second battery E2 respectively; and the second battery E2 charges the first battery E1 through the voltage conversion submodule 52.

[0135] In the embodiments of the present application, the second battery E2 charges the first battery E1 through the voltage conversion submodule 52, so as to supplement the electric energy of the first battery E1 by using the electric energy of the second battery E2.

[0136] Optionally, in some embodiments, the voltage conversion submodule 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 with the second transformer T2, and the first bridge unit 52a is configured to be electrically connected with the second battery E2; the second transformer T2 is electrically connected with the second bridge unit 52b; the second bridge unit 52b is electrically connected with the resonance unit 52c; and the resonance unit 52c is configured to be electrically connected with the first battery E1.

[0137] In the embodiments of the present application, the output voltage of the second battery E2 is converted into the charging voltage of the first battery E1 by the cooperation of the first bridge unit 52a, the second transformer T2, the second bridge unit 52b and the resonance unit 52c.

[0138] Optionally, in some embodiments, the first bridge unit 52a comprises a seventeenth switch device K17, an eighteenth switch device K18, a nineteenth switch device K19 and a twentieth switch device K20; a first end of the seventeenth switch device K17 is electrically connected with a first end of the eighteenth switch device K18, the first end of the seventeenth switch device K17 is configured to be electrically connected with a first electrode of the second battery E2, a second end of the seventeenth switch device K17 is electrically connected with a first end of the nineteenth switch device K19 and a first end of a primary winding of the second transformer T2 respectively; a second end of the nineteenth switch device K19 is electrically connected with a second end of the twentieth switch device K20, the second end of the nineteenth switch device K19 is configured to be electrically connected with a second electrode of the second battery E2; the first end of the eighteenth switch device K18 is configured to be electrically connected with the second electrode of the second battery E2, a second end of the eighteenth switch device K18 is electrically connected with a first end of the twentieth switch device K20 and a second end of the primary winding of the second transformer T2 respectively.

[0139] In some embodiments, the type of the seventeenth switch device K17 comprises a MOS tube, a relay or other types of switch devices.

[0140] In some embodiments, the type of the eighteenth switch device K18 comprises a MOS tube, a relay or other types of switch devices.

[0141] In some embodiments, the type of the nineteenth switch device K19 comprises a MOS tube, a relay or other types of switch devices.

[0142] In some embodiments, the type of the twentieth switch device K20 comprises a MOS tube, a relay or other types of switch devices.

[0143] In the embodiments of the present application, through cooperation of the seventeenth switch device K17, the eighteenth switch device K18, the nineteenth switch device K19 and the twentieth switch device K20, the direct current voltage of the second battery E2 is converted into the alternating current voltage of the primary side of the second transformer T2.

[0144] Optionally, in some embodiments, the second bridge unit 52b comprises a first diode, a second diode, a third diode and a fourth diode; a first end of the first diode is electrically connected with a first end of the second diode and a first end of the resonance unit 52c respectively, a second end of the first diode is electrically connected with 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 with a second end of the fourth diode and a second end of the resonance unit 52c respectively; a first end of the second diode is electrically connected with the first end of the resonance unit 52c, a second end of the second diode is electrically connected with a second end of the secondary winding of the second transformer T2 and a first end of the fourth diode respectively.

[0145] In the embodiments of the present application, the second transformer T2 secondary side AC voltage is converted into DC voltage through the first diode, the second diode, the third diode and the fourth diode.

[0146] Optionally, in some embodiments, the resonance unit 52c comprises a fourth inductor L4 and a fifth capacitor C5; a first end of the fourth inductor L4 is electrically connected with a first end of the second bridge unit 52b, a second end of the fourth inductor L4 is electrically connected with a first end of the fifth capacitor C5, the second end of the fourth inductor L4 is used to be electrically connected with a first electrode of the first battery E1; a first end of the fifth capacitor C5 is electrically connected with the first electrode of the first battery E1, a second end of the fifth capacitor C5 is electrically connected with a second end of the second bridge unit 52b, the second end of the fifth capacitor C5 is used to be electrically connected with a second electrode of the first battery E1.

[0147] In the embodiments of the present application, the fourth inductor L4 and the fifth capacitor C5 constitute a resonance circuit for filtering.

[0148] Optionally, in some embodiments, the conductive layer 20 is arranged on the back surface of the photovoltaic panel 10.

[0149] In some embodiments, the conductive layer 20 is coated on the back surface of the photovoltaic panel 10.

[0150] In the embodiments of the present application, by arranging the conductive layer 20 on the back 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.

[0151] Reference Figure 6 The embodiments of the present application also provide an energy storage method applied to the energy storage system as described above, and the method comprises the following steps:

[0152] Step 101, control the photovoltaic panel 10 or the energy storage capacitor to charge the battery through the voltage conversion module 50.

[0153] In the embodiment of the application, the photovoltaic panel 10 or the energy storage capacitor is controlled to charge the battery through the voltage conversion module 50, so as to realize the power supplement of the battery.

[0154] Step 102, in the case that the battery is fully charged, control the photovoltaic panel 10 to charge the energy storage capacitor.

[0155] In the embodiment of the application, the energy storage capacitor can supplement the insufficient power of the battery by being charged by the photovoltaic panel 10 in the case that the battery is fully charged, so as to improve the endurance of the vehicle.

[0156] In the embodiment of the application, the photovoltaic panel 10 or the energy storage capacitor is first controlled to charge the battery through the voltage conversion module 50, and then the energy storage capacitor is controlled to be charged by the photovoltaic panel 10 in the case that the battery is fully charged, so as to improve the power storage capacity of the vehicle and further improve the endurance of the vehicle.

[0157] The embodiment of the application also provides a vehicle comprising 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.

[0158] The specific implementation process of the energy storage system in the vehicle is similar to the specific implementation process of the energy storage system described above, and will not be described here.

[0159] In the related art, the vehicle relies on photovoltaic power generation, stores the power generated by photovoltaic power generation in the power battery of the vehicle, and then charges the low-voltage storage battery of the vehicle by voltage conversion of the power battery, so as to supplement the power of the low-voltage storage battery, resulting in low charging efficiency of the low-voltage storage battery.

[0160] In the embodiment of the 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 storage battery, without power conversion of the power battery, thereby improving the charging efficiency of the low-voltage storage battery.

[0161] In the embodiment of the application, through the control of the first switching device K1 and the second switching device K2, the switching of the first battery E1 charging and the second battery E2 charging can be realized, that is, the power generated by photovoltaic power generation can be stored in the first battery E1 of the vehicle, or the power generated by photovoltaic power generation 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, so as to store the power generated by photovoltaic power generation in the energy storage capacitor, thereby improving the power storage capacity of the vehicle and further improving the endurance of the vehicle.

[0162] In summary, in the embodiment of the present application, the insulating layer 30 is arranged between the conductive layer 20 and the conductive shell 40 of the vehicle body, and the conductive layer 20, the insulating layer 30 and the conductive shell 40 form an energy storage capacitor, the electric energy in the energy storage capacitor can supplement the battery electric energy of the vehicle, thereby improving the endurance of the vehicle, so as to meet the demand of long endurance of the vehicle.

[0163] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements are not limited to those elements, but can also include other elements not expressly listed, or inherent to such processes, methods, articles, or apparatuses. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatuses in the embodiments of the present application is not limited, and the functions can be performed in the order shown or discussed, or can be performed in a substantially simultaneous manner or in the opposite order, for example, the described method can be performed in an order different from the described order, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0164] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are only illustrative, but not limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. An energy storage system, characterized by, The application relates to a storage system for a vehicle, comprising: 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 a vehicle body, and the conductive layer (20), the insulating layer (30) and the conductive shell (40) form an energy storage capacitor; the storage system further comprises a voltage conversion module (50); the voltage conversion module (50) is electrically connected with a battery of the vehicle; the battery comprises a first battery (E1); the first battery (E1) is a battery of a low-voltage domain of the vehicle; the voltage conversion module (50) comprises an on-board charger (51); the on-board charger (51) is electrically connected with the energy storage capacitor, and the on-board charger (51) is electrically connected with the first battery (E1); the energy storage capacitor charges the first battery (E1) through the on-board charger (51); the on-board charger (51) comprises a power factor correction unit (51a); the power factor correction unit (51a) is electrically connected with the energy storage capacitor, and the power factor correction unit (51a) is electrically connected with the first battery (E1); the power factor correction unit (51a) is used for controlling the energy storage capacitor to charge the first battery (E1).

2. The energy storage system of claim 1, wherein, the storage system further comprises a photovoltaic panel (10); the photovoltaic panel (10) is electrically connected with the energy storage capacitor, and the photovoltaic panel (10) is used for charging the energy storage capacitor.

3. The energy storage system of claim 2, wherein, a first electrode of the photovoltaic panel (10) is electrically connected with the conductive layer (20), and a second electrode of the photovoltaic panel (10) is electrically connected with the conductive shell (40).

4. The energy storage system of claim 2, wherein, the voltage conversion module (50) is further electrically connected with the photovoltaic panel (10); wherein the photovoltaic panel (10) or the energy storage capacitor charges the battery through the voltage conversion module (50).

5. The energy storage system of claim 4, wherein, the battery further comprises a second battery (E2); the voltage of the first battery (E1) is smaller than that of the second battery (E2).

6. The energy storage system of claim 5, wherein, the on-board charger (51) is further electrically connected with the photovoltaic panel (10), and the on-board charger (51) is further electrically connected with the second battery (E2); 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 second battery (E2) through the on-board charger (51).

7. The energy storage system of claim 6, wherein, the on-board charger (51) further comprises a voltage conversion unit (51b); the power factor correction unit (51a) is electrically connected with the photovoltaic panel (10) and the voltage conversion unit (51b) respectively; the voltage conversion unit (51b) is electrically connected with the second battery (E2).

8. The energy storage system of claim 7, wherein, the power factor correction unit (51a) is further used for controlling the photovoltaic panel (10) to charge the first battery (E1), and performing voltage conversion on a first power supply signal output by the photovoltaic panel (10) or a second power supply signal output by the energy storage capacitor to output a third power supply signal. The voltage conversion unit (51b) is configured to convert the third power supply signal into a fourth power supply signal, and output the fourth power supply signal to charge the second battery (E2).

9. The energy storage system of claim 7, wherein, The vehicle charger (51) further comprises a first switching device (K1) and a second switching device (K2); The first end of the first switching device (K1) is electrically connected with the first electrode of the photovoltaic panel (10) and the conductive layer (20) respectively, the second end of the first switching device (K1) is electrically connected with the first end of the vehicle charger (51), and the third end of the first switching device (K1) is electrically connected with the second end of the vehicle charger (51). The first end of the second switching device (K2) is electrically connected with the second electrode of the photovoltaic panel (10) and the conductive shell (40) respectively, the second end of the second switching device (K2) is electrically connected with the third end of the vehicle charger (51), and the third end of the second switching device (K2) is electrically connected with the fourth end of the vehicle charger (51).

10. The energy storage system of claim 9, wherein, The vehicle charger (51) further comprises a third switching device (K3) and a fourth switching device (K4); The first end of the third switching device (K3) is electrically connected with the first end of the vehicle charger (51), and the second end of the third switching device (K3) is electrically connected with the first electrode of the first battery (E1). The first end of the fourth switching device (K4) is electrically connected with the third end of the vehicle charger (51), and the second end of the fourth switching device (K4) is electrically connected with the second electrode of the first battery (E1).

11. The energy storage system of claim 10, wherein, The power factor correction unit (51a) comprises 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 with 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 with the first end of the first bridge sub-unit (A1). The first end of the first capacitor (C1) is electrically connected with 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 with 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 with the third end of the first switching device (K1), the third end of the first bridge sub-unit (A1) is electrically connected with the third end of the second switching device (K2), and the fourth end of the first bridge sub-unit (A1) is electrically connected with the second end of the second switching device (K2) and the first end of the fourth switching device (K4) respectively.

12. The energy storage system of claim 11, wherein, The first bridge sub-unit (A1) comprises a fifth switching device (K5), a sixth switching device (K6), a seventh switching device (K7) and an eighth switching device (K8). The first end of the fifth switch device (K5) is electrically connected with 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) respectively, and the second end of the fifth switch device (K5) is electrically connected with the second end of the first inductor (L1) and the first end of the seventh switch device (K7) respectively; The second end of the seventh switch device (K7) is electrically connected with 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 switch device (K6) is electrically connected with the second end of the second switch device (K2), the first end of the fourth switch device (K4) and the first end of the eighth switch device (K8) respectively.

13. The energy storage system of claim 12, wherein, In the case of controlling the photovoltaic panel (10) or the energy storage capacitor to charge the first inductor (L1) and the first battery (E1), the first end of the first switch device (K1) is controlled to be in communication with the third end of the first switch device (K1), the first end of the second switch device (K2) is controlled to be in communication with the third end of the second switch device (K2), the third switch device (K3) and the fourth switch device (K4) are controlled to be both conductive, the fifth switch device (K5) and the eighth switch device (K8) are controlled to be both conductive, and the sixth switch device (K6) and the seventh switch device (K7) are controlled to be both disconnected.

14. The energy storage system of claim 12, wherein, In the case of controlling the first inductor (L1) to charge the first battery (E1), the first end of the first switch device (K1) is controlled to be in communication with the third end of the first switch device (K1), the first end of the second switch device (K2) is controlled to be in communication with the third end of the second switch device (K2), the third switch device (K3) and the fourth switch device (K4) are controlled to be both conductive, the seventh switch device (K7) and the eighth switch device (K8) are controlled to be both conductive, and the fifth switch device (K5) and the sixth switch device (K6) are controlled to be both disconnected, or: The first end of the first switch device (K1) is controlled to be in communication with the third end of the first switch device (K1), the first end of the second switch device (K2) is controlled to be in communication with the third end of the second switch device (K2), the third switch device (K3) and the fourth switch device (K4) are controlled to be both conductive, the seventh switch device (K7) and the eighth switch device (K8) are controlled to be both disconnected, and the fifth switch device (K5) and the sixth switch device (K6) are controlled to be both conductive.

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

16. The energy storage system of claim 12, wherein, In the case of controlling the photovoltaic panel (10) or the energy storage capacitor, and the first inductor (L1) to jointly charge the first capacitor (C1), the first end of the first switching device (K1) is controlled to be in communication with the second end of the first switching device (K1), the first end of the second switching device (K2) is controlled to be in communication with the second end of the second switching device (K2), the third switching device (K3) and the fourth switching device (K4) are controlled to be both turned off, the fifth switching device (K5) and the eighth switching device (K8) are controlled to be both turned on, and the sixth switching device (K6) and the seventh switching device (K7) are controlled to be both turned off.

17. The energy storage system of claim 12, wherein, In the case of controlling the photovoltaic panel (10) to charge the energy storage capacitor, the second end of the first switching device (K1) and the third end of the first switching device (K1) are both controlled to be disconnected from the first end of the first switching device (K1), and the second end of the second switching device (K2) and the third end of the second switching device (K2) are both controlled to be disconnected from the first end of the second switching device (K2).

18. The energy storage system of any one of claims 2-17, wherein, The conductive layer (20) is arranged on the back surface of the photovoltaic panel (10).

19. A method of storing energy, characterized by The method is applied to the energy storage system according to any one of claims 2 to 18, and the method comprises: controlling the photovoltaic panel (10) or the energy storage capacitor to charge the battery through the voltage conversion module (50); in the case of the battery being fully charged, controlling the photovoltaic panel (10) to charge the energy storage capacitor.

20. A vehicle characterized by The vehicle comprises the energy storage system according to any one of claims 1 to 18, or is used to implement the steps of the energy storage method according to claim 19.

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