Hybrid charging system

Abstract

Embodiments of the present application disclose a hybrid charging system, comprising: at least one integrated storage and charging system and an energy storage supplement system. The integrated storage and charging system comprises an energy storage device and a charging device; the energy storage device is separately connected to a direct current bus and the charging device; the charging device is separately connected to a charging gun and the direct current bus, and is used for transmitting electrical energy in an electric device to the energy storage device and / or a power grid, or transmitting electrical energy of the power grid and / or electrical energy of the energy storage device to the electric device; the energy storage supplement system comprises second-life battery packs connected to the direct current bus; electrical energy in the second-life battery packs is transmitted to the integrated storage and charging system by means of the direct current bus, or the electrical energy of the power grid or the integrated storage and charging system is stored to the second-life battery packs by means of the direct current bus. By integrating second-life battery packs into the hybrid charging system, the problem of retired battery disposal is solved, and efficient conversion and storage of electric energy in the hybrid charging system can also be improved.

Description

Hybrid charging system

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202421646659.X, filed on July 12, 2024, entitled "Hybrid Charging System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to, but is not limited to, the field of charging and discharging technology, and in particular to a hybrid charging system. Background Technology

[0004] With the rapid increase in electrical devices, problems such as slow charging and poor user experience urgently need to be addressed. To meet the charging needs of devices in different scenarios, various charging modes have emerged, including those requiring high power for fast charging. Related technologies often achieve this by adding or expanding existing transformers; however, this method not only increases the construction cost of the charging system but also its footprint.

[0005] In addition, there is also the issue of battery replacement for electrical equipment. With the rapid increase in electrical equipment, the number of retired batteries (such as second-hand or recycled batteries) has also shown a significant increase. The disposal of retired batteries is an urgent problem that needs to be addressed.

[0006] Summary of the Invention

[0007] In view of this, the present disclosure provides at least one hybrid charging system.

[0008] The technical solution of this disclosure embodiment is implemented as follows:

[0009] On one hand, embodiments of this disclosure provide a hybrid charging system, including: at least one integrated energy storage and charging system and an energy storage supplementation system;

[0010] An integrated energy storage and charging system includes an energy storage device and a charging device; among which,

[0011] One end of the energy storage device is connected to the DC bus, and the other end of the energy storage device is connected to the charging device; one end of the charging device is connected to the charging gun, and the other end is connected to the DC bus.

[0012] The charging device is used to transmit electrical energy from electrical equipment to energy storage devices and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical equipment.

[0013] The energy storage supplement system includes a cascaded battery pack connected to a DC bus; wherein, the energy in the cascaded battery pack is transmitted to the integrated energy storage and charging system via the DC bus, or the energy on the grid or the integrated energy storage and charging system is stored in the cascaded battery pack via the DC bus.

[0014] In this embodiment, an energy storage replenishment system is quickly integrated into the hybrid charging system. This method enables the processing of retired batteries, reduces environmental pollution from retired batteries, extends battery life, and improves resource utilization efficiency. Furthermore, applying the energy storage replenishment system to the hybrid charging system can enhance the efficient conversion and storage of electrical energy within the hybrid charging system.

[0015] In some embodiments, the charging device includes a bidirectional DC / DC converter; the charging device is used to deliver electrical energy from the electrical equipment to the energy storage device and / or the power grid via the bidirectional DC / DC converter, or to deliver electrical energy from the power grid and / or the energy storage device to the electrical equipment.

[0016] In this embodiment, the integrated energy storage and charging system, which includes both energy storage and charging devices, enables the hybrid charging system to support multiple charging modes, meeting the charging needs of devices in various scenarios. Furthermore, currently, providing different charging modes to users simultaneously involves additional transformers or expanding existing transformers. However, this method increases both construction costs and floor space. This integrated energy storage and charging system, on the other hand, can provide multiple charging modes to users simultaneously without the need for additional transformers, reducing construction costs.

[0017] In some embodiments, the energy storage supplementation system includes at least one bidirectional DC / DC device and a secondary utilization battery pack corresponding to the bidirectional DC / DC device; wherein one end of the bidirectional DC / DC device is connected to a DC bus and the other end is connected to the secondary utilization battery pack.

[0018] In this embodiment of the disclosure, for the energy storage supplementation system, multiple cascaded battery packs are first connected in series and then connected to a bidirectional DC / DC device to form a battery cluster within the energy storage supplementation system. The system can then be quickly constructed using multiple battery clusters. Finally, by connecting the bidirectional DC / DC device in each battery cluster to a DC bus, the energy storage supplementation system can be quickly integrated into the hybrid charging system. This method enables the processing of retired batteries, reduces environmental pollution from retired batteries, extends battery life, and improves resource utilization efficiency. Furthermore, applying the energy storage supplementation system to a hybrid charging system can improve the energy conversion and storage efficiency of the hybrid charging system.

[0019] In addition, when the grid is under heavy load, the energy storage devices and / or energy storage supplementation systems in the hybrid charging system can charge the electrical equipment, thereby reducing the pressure on the grid.

[0020] In some embodiments, the energy storage device and / or charging device satisfy one or more of the following conditions:

[0021] The ratio between the rated energy of the energy storage device and the maximum discharge power of the energy storage device shall not exceed 1:3;

[0022] The energy density of the energy storage device is greater than or equal to 380 Wh / L;

[0023] The ratio between the rated energy of the energy storage device and the maximum charging power of the charging device is less than 1:4;

[0024] The ratio between the rated energy of an energy storage device and its rated power is less than or equal to 1:4.

[0025] In this embodiment of the disclosure, by limiting the parameter value relationship between the energy storage device and / or the charging device, the battery in the energy storage device can be made relatively small in size and / or small in capacity, but with a large output power, thereby saving the floor space of the hybrid charging system, saving site costs and making it more economical.

[0026] In some embodiments, the energy storage supplementation system satisfies the following condition: the ratio of the energy value of a single battery cluster to the power value of the bidirectional DC / DC device is not less than 3:1.

[0027] In this embodiment of the disclosure, by limiting the parameter value relationship of the energy storage supplementation system, the battery pack in the energy storage supplementation system does not need to be cooled by air cooling or liquid cooling, but only needs to be cooled naturally to enable the battery pack to work normally. This method, which does not require an additional thermal management system, reduces the construction cost of the hybrid charging system.

[0028] In some embodiments, the hybrid charging system further includes a number of bidirectional AC / DC converters corresponding to at least one integrated charging and storage system; wherein...

[0029] One end of the bidirectional AC / DC device is connected to the power grid, and the other end is connected to the DC bus. The bidirectional AC / DC device is used to convert the electrical energy of the power grid into DC power and then transmit it to the DC bus, or to convert the electrical energy on the DC bus into AC power and then transmit it to the power grid.

[0030] In this embodiment of the disclosure, a bidirectional AC / DC device can be used to realize bidirectional power transmission between the power grid and the hybrid charging system.

[0031] In some embodiments, the hybrid charging system further includes a transformer and an energy meter;

[0032] One end of the transformer is connected to the electricity meter, and the other end is connected to the power grid. The transformer is used to transform the voltage of the electrical energy on the power grid and then provide electrical energy to the loads or electrical equipment on the power grid. The electricity meter is used to determine the current electrical energy of the transformer.

[0033] In this embodiment of the disclosure, intelligent distribution of electrical energy in the transformer can be achieved by monitoring the electrical energy in the transformer through an electricity meter.

[0034] In some embodiments, the hybrid charging system further includes at least one AC charging system;

[0035] The AC charging system includes a direct current alternating current converter (DC / AC) and an AC charging station; among which,

[0036] One end of the bidirectional DC / AC device is connected to the DC bus, and the other end is connected to the AC charging pile. The bidirectional DC / AC device is used to convert the electrical energy on the DC bus into AC power and then deliver it to the AC charging pile, or to convert the electrical energy of the AC charging pile into DC power and then deliver it to the DC bus.

[0037] AC charging piles are used to transmit electrical energy from electrical equipment to a bidirectional DC / AC device, or to transmit electrical energy from a bidirectional DC / AC device to electrical equipment.

[0038] In this embodiment of the disclosure, by connecting an AC charging pile system to the hybrid charging system, users can charge their electrical equipment through the AC charging pile system when the grid pressure is low, and discharge the equipment back to the grid when the grid pressure is high, thereby achieving the purpose of energy arbitrage and increasing users' income.

[0039] In some embodiments, the hybrid charging system further includes at least one AC charging system;

[0040] An AC charging system includes an AC charging pile, which is connected to the power grid. The AC charging pile is used to transmit electrical energy from the power grid to the electrical equipment, or to transmit electrical energy from the electrical equipment to the power grid.

[0041] In this embodiment of the disclosure, by connecting an AC charging pile system to the hybrid charging system, users can charge their electrical equipment through the AC charging pile system when the grid pressure is low, and discharge the equipment back to the grid when the grid pressure is high, thereby achieving the purpose of energy arbitrage and increasing users' income.

[0042] In some embodiments, the hybrid charging system further includes a photovoltaic system and an energy storage system;

[0043] The photovoltaic system includes at least one maximum power point tracking device and a photovoltaic panel device corresponding to the maximum power point tracking device. One end of the maximum power point tracking device is connected to a DC bus, and the other end is connected to the photovoltaic panel device. The maximum power point tracking device is used to make the photovoltaic panel device operate near the maximum power point and to transmit the electrical energy on the photovoltaic panel device to the DC bus. The photovoltaic panel device is used to convert solar energy into electrical energy.

[0044] The energy storage system is connected to the DC bus; the energy storage system is used to store electrical energy on the DC bus or release electrical energy to the DC bus.

[0045] In this embodiment, the photovoltaic system directly converts solar radiation energy into electrical energy through photovoltaic panels. This energy conversion process does not pollute the environment or damage the ecosystem, making it a clean, safe, and renewable energy source. The energy storage system can store excess electrical energy in the hybrid charging system and release it when needed, achieving energy balance and stable supply. Therefore, this hybrid charging system, which includes both a photovoltaic system and an energy storage system, not only achieves efficient energy conversion and storage but also reduces dependence on fossil fuels, lowers carbon emissions, and is beneficial to environmental protection.

[0046] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the technical solutions of this disclosure. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0048] Figure 1 is a schematic diagram of a hybrid charging system provided in an embodiment of this disclosure;

[0049] Figure 2 is a schematic diagram of the implementation of a hybrid charging system provided in an embodiment of this disclosure;

[0050] Figure 3 is a schematic diagram of the connection of a battery cluster in an energy storage supplementation system provided in an embodiment of this disclosure;

[0051] Figure 4 is a schematic diagram of the implementation of a hybrid charging system provided in an embodiment of this disclosure;

[0052] Figure 5 is a schematic diagram of the implementation of a hybrid charging system provided in an embodiment of this disclosure;

[0053] Figure 6 is a schematic diagram of the implementation of a hybrid charging system provided in an embodiment of this disclosure;

[0054] Figure 7 is a schematic diagram of the implementation of a hybrid charging system provided in an embodiment of this disclosure;

[0055] Figure 8 is a schematic diagram of the implementation of a hybrid charging system provided in an embodiment of this disclosure.

[0056] Reference numerals: 1-Communication line; 11-AC charging system; 111-Bidirectional DC / AC device; 112-AC charging pile; 113-AC control unit; 21-Integrated energy storage and charging system; 211-Wireless communication module; 212-Energy storage device; 213-Charging device; 214-Control unit; 216-Charging gun; 3-Energy storage supplementation system; 31-Energy storage supplementation control unit; 311-Bidirectional DC / DC device; 312-Secondary battery pack; 4-Photovoltaic system; 41-Photovoltaic system control unit; 411-Photovoltaic panel device; 412-MPPT device; 215-Bidirectional AC / DC device; 8-DC bus; 5-Energy storage system; 9-Load; 6-Electricity meter; 7-Transformer; 10-Power grid. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the specific technical solutions disclosed will be further described in detail below with reference to the accompanying drawings. The following embodiments are used to illustrate this disclosure, but are not intended to limit the scope of this disclosure.

[0058] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0059] In the following description, the terms "first," "second," and "third" are used only to distinguish different objects and do not represent a specific order of objects or have any chronological limitation. It is understood that "first," "second," and "third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to be limiting of this disclosure.

[0061] This disclosure provides a hybrid charging system, as shown in FIG1, including: at least one integrated energy storage and charging system 21 and an energy storage supplementation system 3;

[0062] The integrated energy storage and charging system 21 includes an energy storage device 212 and a charging device 213; wherein,

[0063] One end of the energy storage device 212 is connected to the power grid 10 via the DC bus 8, and the other end of the energy storage device 212 is connected to the charging device 213. One end of the charging device 213 is connected to the charging gun 216, and the other end is connected to the DC bus 8. The charging gun 216 is connected to the electrical equipment. In this example, the electrical equipment can be an electric vehicle or other equipment that uses a power battery as its driving force. In addition to charging the electrical equipment, the integrated energy storage and charging system 21 also stores the excess electrical energy of the electrical equipment in the energy storage device 212 or the energy storage supplement system 3 disclosed herein.

[0064] The charging device 213 is used to transmit electrical energy from the electrical equipment to the energy storage device 212 and / or the power grid 10, or to transmit electrical energy from the power grid 10 and / or the energy storage device 212 to the electrical equipment.

[0065] The energy storage supplement system 3 includes at least one secondary battery pack 312 connected to the DC bus 8; wherein the electrical energy in the secondary battery pack 312 is transmitted to the integrated energy storage and charging system 21 via the DC bus 8, or the electrical energy on the grid 10 or the integrated energy storage and charging system 21 is stored in the secondary battery pack 312 via the DC bus 8.

[0066] In this embodiment, an energy storage replenishment system is quickly integrated into the hybrid charging system. This method enables the processing of retired batteries, reduces environmental pollution from retired batteries, extends battery life, and improves resource utilization efficiency. Furthermore, applying the energy storage replenishment system to the hybrid charging system can enhance the efficient conversion and storage of electrical energy within the hybrid charging system.

[0067] It should be noted that in this embodiment, the charging gun is not included in the integrated energy storage and charging system. The integrated energy storage and charging system can provide some interfaces through which the charging gun connects to the integrated energy storage and charging system. In other embodiments, the integrated energy storage and charging system may also include a charging gun.

[0068] This disclosure provides a hybrid charging system, as shown in FIG2, including at least one integrated energy storage and charging system and an energy storage supplementation system;

[0069] Here, at least one integrated energy storage and charging system can be N, that is, the hybrid charging system includes N integrated energy storage and charging systems 21, where N is an integer greater than 1.

[0070] The integrated energy storage and charging system 21 includes an energy storage device 212 and a charging device 213; wherein,

[0071] One end of the energy storage device 212 is connected to the DC bus 8 to output the electrical energy in the energy storage device 212 to the power grid 10; the other end of the energy storage device 212 is connected to the charging device 213 to charge the electrical equipment through the charging device 213 and the charging gun 216; the energy storage device 212 is used to charge the electrical equipment through the charging device 213, or to output the electrical energy in the energy storage device 212 to the DC bus 8.

[0072] Here, the electrical equipment can only be charged or discharged after it is connected to the charging gun in the integrated charging and storage system.

[0073] In some implementations, electrical energy on the DC bus can also be delivered to the energy storage device to charge it.

[0074] The charging device includes a bidirectional DC / DC device, with one end of the charging device 213 connected to the charging gun 216 and the other end connected to the DC bus 8;

[0075] The charging device 213 is used to transmit electrical energy from the electrical equipment to the energy storage device 212 and / or the power grid 10 via a bidirectional DC / DC device, or to transmit electrical energy from the power grid 10 and / or the energy storage device 212 to the electrical equipment.

[0076] Here, the electrical energy in the electrical equipment is direct current (DC), and the electrical energy in the energy storage device is also direct current (DC). Therefore, the electrical energy in the electrical equipment can be transmitted to the energy storage device via a bidirectional DC / DC device, and / or the electrical energy in the electrical equipment can be transmitted to the DC bus via a bidirectional DC / DC device, and then the electrical energy on the DC bus can be converted to alternating current (AC) via a bidirectional AC / DC device connected to the power grid and the DC bus before being transmitted to the power grid; or, the electrical energy in the power grid can be converted to DC via a bidirectional AC / DC device and transmitted to the DC bus, and then the electrical energy on the DC bus can be transmitted to the electrical equipment via a bidirectional DC / DC device, and / or the electrical energy in the energy storage device can be transmitted to the electrical equipment via a bidirectional DC / DC device.

[0077] In some embodiments, the integrated storage and charging system 21 further includes a control unit 214 and a wireless communication module 211; wherein,

[0078] The control unit 214 is used to determine and control the operation of the charging device 213 and the energy storage device 212 in the integrated charging and energy storage system 21; one end of the wireless communication module 211 is connected to the control unit 214 and the other end is connected to the communication line 1, and is used to communicate with other systems in the hybrid charging system.

[0079] Here, the operation of the charging device may include: transmitting electrical energy from the electrical equipment to the energy storage device or the DC bus, or transmitting electrical energy from the DC bus or the energy storage device to the electrical equipment. The operation of the energy storage device may include: receiving electrical energy transmitted by the charging device, or releasing electrical energy from the energy storage device through the charging device.

[0080] In this context, "other systems" in a hybrid charging system refers to systems other than the integrated energy storage and charging system, such as energy storage supplementation systems and photovoltaic systems.

[0081] The energy storage supplementation system 3 includes at least one bidirectional DC / DC device 311 and a secondary battery pack 312 corresponding to the bidirectional DC / DC device 311; wherein,

[0082] One end of the bidirectional DC / DC device 311 is connected to the DC bus 8, and the other end is connected to the secondary battery pack 312. The bidirectional DC / DC device 311 is used to transmit the electrical energy in the secondary battery pack 312 to the DC bus 8, or to transmit the electrical energy on the DC bus 8 to the secondary battery pack 312.

[0083] It should be noted that at least one bidirectional DC / DC device can be P, that is, the energy storage supplement system 3 includes P bidirectional DC / DC devices 311, where P is an integer greater than 1.

[0084] Here, "secondary battery pack" refers to a type of battery pack that has been used and whose performance has degraded to a certain extent, and is then reused in other fields through testing, evaluation, repair and other technical means.

[0085] The energy in the secondary battery pack is direct current (DC). Therefore, the energy in the secondary battery pack can be transmitted to the DC bus via a bidirectional DC / DC device, and then the energy on the DC bus can be converted to alternating current (AC) via a bidirectional AC / DC device before being transmitted to the power grid to discharge the secondary battery pack. Alternatively, the energy from the power grid can be converted to DC via a bidirectional AC / DC device and transmitted to the DC bus, and then the energy on the DC bus can be transmitted to the secondary battery pack via a bidirectional DC / DC device to charge the secondary battery pack.

[0086] Figure 3 shows the connection method of the battery cluster in the energy storage supplement system. The energy storage supplement system includes two battery systems 30. Each battery system 30 includes multiple battery packs 312 for battery cascade utilization. By connecting the multiple battery packs 312 in series with the bidirectional DC / DC device 311, a battery cluster in the energy storage supplement system can be formed and output high voltage to the outside.

[0087] Here, "multiple reused battery packs" refers to two or more reused battery packs, such as 2, 3, or 4 reused battery packs 312. In this embodiment, the retired batteries in the reused battery packs can undergo some testing. After passing the testing, they can be used without further processing.

[0088] In some embodiments, the energy storage supplementation system 3 further includes an energy storage supplementation control unit 31; wherein,

[0089] The energy storage supplement control unit 31 is used to determine and control the operation of the bidirectional DC / DC device 311 and the secondary battery pack 312 in the energy storage supplement system 3; the energy storage supplement control unit 31 is connected to the communication line 1 and is also used to communicate with other systems in the hybrid charging system.

[0090] Here, the operation of the bidirectional DC / DC device may include: supplying electrical energy from the DC bus to the secondary battery pack, or supplying electrical energy from the secondary battery pack to the DC bus. The operation of the secondary battery pack may include: receiving electrical energy supplied by the bidirectional DC / DC device, or discharging electrical energy from the secondary battery pack through the bidirectional DC / DC device.

[0091] It should be noted that the other systems in the hybrid charging system here refer to systems other than the energy storage supplementary system, such as integrated energy storage and charging systems, photovoltaic systems, etc.

[0092] In this embodiment, the integrated energy storage and charging system, which includes both energy storage and charging devices, enables the hybrid charging system to support multiple charging modes, meeting the charging needs of devices in various scenarios. Furthermore, currently, providing different charging modes to users simultaneously involves additional transformers or expanding existing transformers. However, this method increases both construction costs and floor space. This integrated energy storage and charging system, on the other hand, can provide multiple charging modes to users simultaneously without the need for additional transformers, reducing construction costs.

[0093] For energy storage replenishment systems, multiple cascaded battery packs are first connected in series to a bidirectional DC / DC converter, forming a battery cluster within the system. Multiple battery clusters allow for rapid system deployment. Finally, by connecting the bidirectional DC / DC converter in each cluster to a DC bus, the system can be quickly integrated into a hybrid charging system. This approach facilitates the disposal of retired batteries, reducing environmental pollution, extending battery lifespan, and improving resource utilization efficiency. Furthermore, applying energy storage replenishment systems to hybrid charging systems enhances the efficiency of energy conversion and storage.

[0094] In addition, when the grid is under heavy load, the energy storage devices and / or energy storage supplementation systems in the hybrid charging system can charge the electrical equipment, thereby reducing the pressure on the grid.

[0095] In some embodiments, the input power of the energy storage device 212 is less than 150 kW; in the charging mode of the integrated energy storage and charging system 21, including the first charging mode, the output power of the energy storage device 212 is greater than or equal to 300 kW.

[0096] In the charging mode of the integrated energy storage and charging system 21, including the second charging mode, the output power of the energy storage device 212 is less than 300 kilowatts.

[0097] Here, charging mode generally refers to the charging method used by the charging device when charging the electrical equipment. The charging device can include at least one charging mode, such as a first charging mode and a second charging mode. In practice, the first charging mode can be an overcharge mode, that is, in the overcharge mode, the output power of the energy storage device is greater than or equal to 300 kilowatts, for example, the output power of the energy storage device is 300 kilowatts, or the output power of the energy storage device is 450 kilowatts, or the output power of the energy storage device is 400 kilowatts, etc.; the second charging mode can be a fast charging mode, that is, in the fast charging mode, the output power of the energy storage device is less than 300 kilowatts, for example, the output power of the energy storage device is 200 kilowatts, or the output power of the energy storage device is 150 kilowatts, or the output power of the energy storage device is 40 kilowatts, etc.

[0098] In this embodiment of the disclosure, the input power of the energy storage device and the output power range of the energy storage device under different charging modes are provided, so that the hybrid charging system can support multiple charging modes.

[0099] In some embodiments, the ratio between the rated energy of the energy storage device 212 and the rated power of the energy storage device 212 is less than or equal to 1:4.

[0100] It should be noted that rated energy is generally measured in watt-hours (Wh), while power is measured in watts (W). The ratio here is the numerical proportion between rated energy and rated power, and this numerical proportion is less than or equal to 1:4.

[0101] In some embodiments, the energy storage device 212 and / or the charging device 213 satisfy one or more of the following conditions:

[0102] The ratio between the rated energy of the energy storage device and the maximum discharge power of the energy storage device shall not exceed 1:3;

[0103] The energy density of the energy storage device is greater than or equal to 380 Wh / L;

[0104] The ratio between the rated energy of the energy storage device and the maximum charging power of the charging device is less than 1:4.

[0105] In this embodiment of the disclosure, by limiting the parameter value relationship between the energy storage device and / or the charging device, the battery in the energy storage device can be made relatively small in size and / or small in capacity, but with a large output power, thereby saving the floor space of the hybrid charging system, saving site costs and making it more economical.

[0106] In some embodiments, the energy storage supplementation system satisfies the following condition: the ratio of the energy value of a single battery cluster to the power value of the bidirectional DC / DC device is not less than 3:1.

[0107] It should be noted that the unit of energy is generally Wh, while the unit of power is W. The ratio here is the numerical ratio between the energy of a single-cluster battery system and the power of a single-cluster battery system, and this numerical ratio is no greater than 3:1.

[0108] Here, a single battery system includes multiple battery packs for secondary use in a single battery cluster. For example, Figure 3 includes two battery systems 30, and each battery system 30 includes multiple battery packs for secondary use 312.

[0109] In this embodiment of the disclosure, by limiting the parameter value relationship of the energy storage supplementation system, the battery pack in the energy storage supplementation system does not need to be cooled by air cooling or liquid cooling, but only needs to be cooled naturally to enable the battery pack to work normally. This method, which does not require an additional thermal management system, reduces the construction cost of the hybrid charging system.

[0110] This disclosure provides a hybrid charging system, as shown in FIG2, including a number of bidirectional AC / DC devices 215 corresponding to at least one integrated charging and storage system; wherein...

[0111] One end of the bidirectional AC / DC device 215 is connected to the power grid 10, and the other end is connected to the DC bus 8. The bidirectional AC / DC device 215 is used to convert the electrical energy of the power grid 10 into DC power and then transmit it to the DC bus 8, or to convert the electrical energy on the DC bus 8 into AC power and then transmit it to the power grid 10.

[0112] Here, the power grid's electrical energy is alternating current (AC), while the DC bus's electrical energy is direct current (DC). Therefore, the AC power from the power grid can be converted to DC power and then transmitted to the DC bus using a bidirectional AC / DC device; or the DC power on the DC bus can be converted to AC power and then transmitted to the power grid using a bidirectional AC / DC device.

[0113] In this embodiment of the disclosure, a bidirectional AC / DC device can be used to realize bidirectional power transmission between the power grid and the hybrid charging system.

[0114] This disclosure provides a hybrid charging system, as shown in FIG4, including a transformer 7 and an energy meter 6;

[0115] One end of transformer 7 is connected to electricity meter 6, and the other end is connected to power grid 10; transformer 7 is used to transform the voltage of electrical energy on power grid 10 and then provide electrical energy to load 9 and / or electrical equipment on power grid 10; electricity meter 6 is used to determine the current electrical energy of transformer 7.

[0116] In some implementations, the transformer 7 is used to provide electrical energy to the load 9, and / or to provide electrical energy to the electrical equipment through an AC charging system and / or an integrated energy storage and charging system 21, thereby enabling the electrical equipment to be charged through the power grid.

[0117] In practice, when the load 9 has a low power demand, the transformer 7 will have surplus power after supplying power to the load 9. When the electrical equipment is connected to the charging gun, the transformer 7 can transmit the surplus power to the AC charging system and / or the integrated energy storage and charging system 21 through the DC bus 8, thereby charging the electrical equipment through the AC charging system and / or the integrated energy storage and charging system 21. Alternatively, it can transmit power to the energy storage devices and energy storage supplement systems in the hybrid charging system through the DC bus 8, thereby charging the energy storage systems in the hybrid charging system. When the load 9 has a high power demand, the transformer 7 will supply all the power to the load 9, and the electrical equipment can be charged through other systems in the hybrid charging system.

[0118] In this embodiment of the disclosure, intelligent distribution of electrical energy in the transformer can be achieved by monitoring the electrical energy in the transformer through an electricity meter.

[0119] This disclosure provides a hybrid charging system, as shown in FIG5, including at least one AC charging system;

[0120] Here, at least one AC charging system can be M, that is, the hybrid charging system includes M AC charging systems 11, where M is an integer greater than 1.

[0121] The AC charging system 11 includes a bidirectional DC / AC device 111 and an AC charging pile 112; wherein,

[0122] One end of the bidirectional DC / AC device 111 is connected to the DC bus 8, and the other end is connected to the AC charging pile 112. The bidirectional DC / AC device 111 is used to convert the electrical energy on the DC bus 8 into AC power and then transmit it to the AC charging pile 112, or to convert the electrical energy on the AC charging pile 112 into DC power and then transmit it to the DC bus 8.

[0123] The AC charging pile 112 is used to transmit the electrical energy supplied by the electrical equipment to the bidirectional DC / AC device 111, or to transmit the electrical energy supplied by the bidirectional DC / AC device 111 to the electrical equipment.

[0124] Here, the input power of the AC charging pile is AC power. Therefore, the power on the DC bus can be converted into AC power and then delivered to the AC charging pile through a bidirectional DC / AC device; or, the power at the AC charging pile can be converted into DC power and then delivered to the DC bus through a bidirectional DC / AC device.

[0125] In some implementations, the bidirectional DC / AC device can be connected to the AC charging station 112 via a three-phase wire (ABCN), wherein the three-phase wire includes an A-phase wire, a B-phase wire, a C-phase wire, three-phase electricity, and an N-neutral wire (zero wire).

[0126] In some embodiments, the AC charging system 11 further includes an AC control unit 113; wherein,

[0127] The AC control unit 113 is used to determine and control the operation of the bidirectional DC / AC device 111 and the AC charging pile 112 in the AC charging system 11; one end of the AC control unit 113 is connected to the communication line 1 and is also used to communicate with other systems in the hybrid charging system.

[0128] Here, the operation of the bidirectional DC / AC device may include: converting electrical energy on the DC bus into AC power and supplying it to the AC charging station, or converting electrical energy obtained by the AC charging station from the electrical equipment into DC power and supplying it to the DC bus. The operation of the AC charging station may include: receiving electrical energy supplied by the electrical equipment, or supplying electrical energy to the electrical equipment.

[0129] It should be noted that the other systems in the hybrid charging system here refer to systems other than the AC charging system, such as integrated energy storage and charging systems, photovoltaic systems, etc.

[0130] In this embodiment of the disclosure, by connecting an AC charging pile system to the hybrid charging system, users can charge their electrical equipment through the AC charging pile system when the grid pressure is low, and discharge the equipment back to the grid when the grid pressure is high, thereby achieving the purpose of energy arbitrage and increasing users' income.

[0131] This disclosure provides a hybrid charging system, as shown in FIG6, including at least one AC charging system;

[0132] Here, at least one AC charging system can be M, that is, the hybrid charging system includes M AC charging systems 11, where M is an integer greater than 1.

[0133] The AC charging system 11 includes an AC charging pile 112, which is connected to the power grid 10. The AC charging pile 112 is used to transmit electrical energy from the power grid 10 to the electrical equipment, or to transmit electrical energy from the electrical equipment to the power grid 10.

[0134] Here, the AC charging station can be connected to the power grid via a three-phase power line (ABCN). The input power to the AC charging station is alternating current (AC), so power from the power grid can be transmitted to the AC charging station; or, the power at the AC charging station can be converted to direct current (DC) and transmitted to the power grid.

[0135] In some embodiments, the AC charging system 11 further includes an AC control unit 113; wherein,

[0136] The AC control unit 113 is used to determine and control the operation of the AC charging pile 112 in the AC charging system 11; one end of the AC control unit 113 is connected to the communication line 1 for communication with other systems in the hybrid charging system.

[0137] Here, the operation of AC charging piles may include: receiving electrical energy from electrical equipment and sending it to the power grid, or transmitting electrical energy from the power grid to electrical equipment.

[0138] In this embodiment of the disclosure, by connecting an AC charging pile system to the hybrid charging system, users can charge their electrical equipment through the AC charging pile system when the grid pressure is low, and discharge the equipment back to the grid when the grid pressure is high, thereby achieving the purpose of energy arbitrage and increasing users' income.

[0139] This disclosure provides a hybrid charging system, as shown in FIG7 or FIG8, which further includes a photovoltaic system 4 and an energy storage system 5.

[0140] The photovoltaic system 4 includes at least one MPPT (Maximum Power Point Tracking) device 412 and a photovoltaic panel device 411 corresponding to the MPPT device 412. One end of the MPPT device 412 is connected to the DC bus 8, and the other end is connected to the photovoltaic panel device 411. The MPPT device 412 is used to make the photovoltaic panel device 411 operate near the maximum power point and to transmit the electrical energy on the photovoltaic panel device 411 to the DC bus 8. The photovoltaic panel device 411 is used to convert solar energy into electrical energy.

[0141] Here, the MPPT device is a key component of the photovoltaic system. Its main function is to improve the utilization rate of photovoltaic cells and ensure that the photovoltaic system always operates near the maximum power point, thereby improving the power generation efficiency of the photovoltaic system.

[0142] It should be noted that at least one MPPT device can be Q, meaning the photovoltaic system 4 includes Q MPPT devices 412, where Q is an integer greater than 1. The electrical energy generated by the photovoltaic panel device 411 is direct current.

[0143] The energy storage system 5 is connected to the DC bus 8; the energy storage system 5 is used to store electrical energy on the DC bus 8 or release electrical energy to the DC bus 8.

[0144] Here, an energy storage system is a technological device capable of storing electrical energy and releasing it when needed. In charging systems, energy storage systems play a crucial role, storing electrical energy when power supply is sufficient and releasing it when power demand increases or supply is insufficient to meet load demands or participate in grid regulation services. Types of energy storage systems can include mechanical energy storage, electrical energy storage, and electrochemical energy storage. For example, mechanical energy storage can include pumped hydro storage, compressed air energy storage, and flywheel energy storage; electrical energy storage can include supercapacitor energy storage and superconducting energy storage; and electrochemical energy storage can include lead-acid batteries, lithium-ion batteries, sodium-sulfur batteries, and flow batteries.

[0145] In some embodiments, the photovoltaic system 4 further includes a photovoltaic system control unit 41; wherein,

[0146] The photovoltaic system control unit 41 is used to determine and control the operation of the MPPT device 412 in the photovoltaic system 4; the photovoltaic system control unit 41 is connected to the communication line 1 for communication with other systems in the hybrid charging system.

[0147] Here, the operation of the MPPT device may include: adjusting the operating point of the photovoltaic panel device to transmit the electrical energy from the photovoltaic panel device to the DC bus.

[0148] In some implementations, the photovoltaic system and energy storage system are optional components of the hybrid charging system.

[0149] Of course, the hybrid charging system can also support the integration of new energy power generation systems such as wind power, hydropower, biomass power, and geothermal power. By connecting these new energy power generation systems to the hybrid charging system, a long-term and stable power supply can be provided, and the reliance on battery-based energy storage systems can be reduced, thus minimizing environmental pollution. The composition of the hybrid charging system can be configured by those skilled in the art according to actual needs, and will not be elaborated upon here.

[0150] In this embodiment, the photovoltaic system directly converts solar radiation energy into electrical energy through photovoltaic panels. This energy conversion process does not pollute the environment or damage the ecosystem, making it a clean, safe, and renewable energy source. The energy storage system can store excess electrical energy in the hybrid charging system and release it when needed, achieving energy balance and stable supply. Therefore, this hybrid charging system, which includes both a photovoltaic system and an energy storage system, not only achieves efficient energy conversion and storage but also reduces dependence on fossil fuels, lowers carbon emissions, and is beneficial to environmental protection.

[0151] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above-described embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0152] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0153] In the several embodiments provided in this disclosure, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components may be combined, or integrated into another system, or some features may be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0154] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0155] In addition, each functional unit in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0156] The above are merely embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of protection of the above-described solutions.

Claims

1. A hybrid charging system, comprising: At least one integrated energy storage and charging system and an energy storage replenishment system; The integrated energy storage and charging system includes an energy storage device and a charging device; wherein... One end of the energy storage device is connected to the DC bus, and the other end of the energy storage device is connected to the charging device; one end of the charging device is connected to the charging gun, and the other end is connected to the DC bus. The charging device is used to transmit electrical energy from the electrical equipment to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical equipment. The energy storage supplementation system includes a secondary battery pack connected to the DC bus; wherein, the electrical energy in the secondary battery pack is transmitted to the integrated energy storage and charging system via the DC bus, or the electrical energy on the power grid or the integrated energy storage and charging system is stored in the secondary battery pack via the DC bus.

2. The hybrid charging system based on claim 1, wherein, The charging device includes a bidirectional DC / DC device; The charging device is used to transmit electrical energy from the electrical equipment to the energy storage device and / or the power grid via the bidirectional DC / DC device, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical equipment.

3. The hybrid charging system based on claim 1, wherein, The energy storage supplementation system includes at least one bidirectional DC / DC device and a secondary battery pack corresponding to the bidirectional DC / DC device; wherein... One end of the bidirectional DC / DC device is connected to the DC bus, and the other end is connected to the secondary battery pack.

4. The hybrid charging system based on claim 3, wherein, In the case where there are multiple secondary battery packs corresponding to the bidirectional DC / DC device in the energy storage supplement system, the multiple secondary battery packs are connected in series to form a battery system, and the battery system is connected to the bidirectional DC / DC device.

5. The hybrid charging system based on claim 1, wherein, The ratio between the rated energy of the energy storage device and the maximum discharge power of the energy storage device is no greater than 1:

3.

6. Based on the hybrid charging system of claims 1 to 5, the energy storage device and / or the charging device satisfy one or more of the following conditions: The energy storage device has an energy density greater than or equal to 380 Wh / L; The ratio between the rated energy of the energy storage device and the maximum charging power of the charging device is less than 1:4; The ratio between the rated energy of the energy storage device and the rated power of the energy storage device is less than or equal to 1:

4.

7. Based on the hybrid charging system according to claims 1 to 5, the energy storage supplement system satisfies the following condition: the ratio of the energy value of a single battery cluster to the power value of the bidirectional DC / DC device is not less than 3:

1.

8. The hybrid charging system according to any one of claims 1 to 5, wherein, The hybrid charging system further includes a number of bidirectional AC / DC devices corresponding to the at least one integrated storage and charging system; wherein... One end of the bidirectional AC / DC device is connected to the power grid, and the other end is connected to the DC bus. The bidirectional AC / DC device is used to convert the electrical energy of the power grid into DC power and then transmit it to the DC bus, or to convert the electrical energy on the DC bus into AC power and then transmit it to the power grid.

9. The hybrid charging system according to any one of claims 1 to 5, wherein, The hybrid charging system also includes a transformer and an electricity meter; One end of the transformer is connected to the electricity meter, and the other end is connected to the power grid; the transformer is used to transform the voltage of the electrical energy on the power grid and then provide electrical energy to the load on the power grid or the electrical equipment. The electricity meter is used to determine the current electrical energy of the transformer.

10. The hybrid charging system according to any one of claims 1 to 5, wherein, The hybrid charging system also includes at least one AC charging system; The AC charging system includes a bidirectional DC / AC device and an AC charging pile; wherein... One end of the bidirectional DC / AC device is connected to the DC bus, and the other end is connected to the AC charging pile; the bidirectional DC / AC device is used to convert the electrical energy on the DC bus into AC power and then supply it to the AC charging pile, or to convert the electrical energy on the AC charging pile into DC power and then supply it to the charging pile. The DC bus is described; The AC charging pile is used to transmit the electrical energy supplied by the electrical equipment to the bidirectional DC / AC device, or to transmit the electrical energy supplied by the bidirectional DC / AC device to the electrical equipment.

11. The hybrid charging system according to claim 10, wherein, The bidirectional DC / AC device is connected to the AC charging pile via a three-phase power line.

12. The hybrid charging system according to any one of claims 1 to 5, wherein, The hybrid charging system also includes at least one AC charging system; The AC charging system includes an AC charging pile connected to the power grid; the AC charging pile is used to transmit electrical energy from the power grid to the electrical equipment, or to transmit electrical energy from the electrical equipment to the power grid.

13. The hybrid charging system based on claim 12, wherein, The AC charging pile is connected to the power grid via three-phase wires.

14. The hybrid charging system according to any one of claims 1 to 5, wherein, The hybrid charging system also includes a photovoltaic system; The photovoltaic system includes at least one maximum power point tracking device and a photovoltaic panel device corresponding to the maximum power point tracking device. One end of the maximum power point tracking device is connected to the DC bus, and the other end is connected to the photovoltaic panel device. The maximum power point tracking device is used to make the photovoltaic panel device operate near the maximum power point and to transmit the electrical energy on the photovoltaic panel device to the DC bus. The photovoltaic panel device is used to convert solar energy into electrical energy.

15. The hybrid charging system according to any one of claims 1 to 5, wherein, The hybrid charging system also includes an energy storage system; The energy storage system is connected to the DC bus; the energy storage system is used to store electrical energy on the DC bus or release electrical energy to the DC bus.

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