An energy storage module and power supply system

Abstract

The application relates to the technical field of charging, and provides a power storage module and a power supply system. The power storage module provided by the application comprises a direct-current transformer, a power storage unit, a first power supply connecting end and a second power supply connecting end. The power storage unit is connected with a first end of the direct-current transformer. The first power supply connecting end is connected with a second end of the direct-current transformer, and the first power supply connecting end is suitable for connecting a power supply device.

Description

Technical Field

[0001] This application relates to the field of charging technology, and in particular to an energy storage module and a power supply system. Background Technology

[0002] In existing solutions, low-voltage loads within the power supply system (such as control and cooling systems) typically still rely on the power grid. This leads to a risk of power outages for low-voltage loads in special scenarios without grid access (such as supermarket showrooms, county-level road network stations, off-road temporary campsites, or overseas areas with unstable power grids), affecting the basic operation of the power supply system. Summary of the Invention

[0003] This application aims to solve the problems in related technologies and proposes an energy storage module and a power supply system.

[0004] This application provides an energy storage module, including:

[0005] DC transformer;

[0006] Energy storage unit, which is connected to the first terminal of the DC transformer;

[0007] The first power supply connection terminal is connected to the second end of the DC transformer and is suitable for connecting a power supply device.

[0008] In some alternative embodiments, the energy storage module further includes a second power supply connection terminal, which is connected to the energy storage unit and is adapted to connect to a power supply device.

[0009] In some alternative embodiments, the energy storage module further includes a first switch, a first end of which is connected to the energy storage unit and a second power supply connection terminal. The first switch is used to control the connection between the energy storage unit and the second power supply connection terminal.

[0010] In some alternative embodiments, the energy storage module further includes a start switch, one end of which is connected to the second end of the DC transformer and the other end of which is connected to the first power supply connection terminal. The start switch is used to control the connection between the DC transformer and the first power supply connection terminal.

[0011] Another aspect of this application provides a power supply system, including:

[0012] Power supply device,

[0013] The energy storage module is connected to the energy storage connection terminal of the power supply device.

[0014] In some alternative embodiments, the power supply device includes a conversion module, with an energy storage connection terminal connected to a first terminal of the conversion module; the conversion module is used to convert the voltage magnitude and / or form of electrical energy input to the energy storage connection terminal, and the energy storage connection terminal is connected to a second power supply connection terminal of the energy storage module.

[0015] In some alternative embodiments, the power supply device further includes a grid connection terminal adapted to connect to a power grid;

[0016] And / or, the power supply device also includes a terminal connection end, which is connected to the second end of the conversion module.

[0017] In some alternative embodiments, the power supply device further includes a second switch, the first end of which is connected to the power grid connection terminal, and the second end of which is connected to the second end of the conversion module.

[0018] In some alternative embodiments, the power supply device further includes a mobile connection terminal adapted to connect a mobile energy storage device, the mobile connection terminal being connected to a second terminal of the second switch.

[0019] In some alternative implementations, the power supply device further includes a host load connected to a third terminal of the conversion module;

[0020] And / or, the power supply device also includes an AC transformer, the first end of which is connected to the power grid connection terminal;

[0021] And / or, the power supply system also includes a terminal module, the input of which is connected to the terminal connection terminal.

[0022] In some alternative implementations, the power supply device also includes a controller configured to control the power supply device in grid power supply mode, energy storage power supply mode, or mobile power supply mode.

[0023] In some alternative implementations, the controller is connected to the second switch, and in the grid power supply mode, the second switch is controlled to be disconnected; or, in the energy storage power supply mode, the second switch is controlled to be connected; or, in the mobile power supply mode, the second switch is controlled to be connected.

[0024] In some alternative implementations, the controller is connected to the conversion module, and the energy storage power supply mode is as follows: the first end of the conversion module is connected to the energy storage connection end, and the second end of the conversion module is connected to the terminal connection end.

[0025] In summary, this application can achieve at least the following technical effects:

[0026] This application adds a DC transformer to the energy storage module, converting the high-voltage electricity from the energy storage unit into low-voltage electricity, which is then output to the power supply device through the first power supply connection terminal. This provides the power supply device with the required low-voltage electricity, thereby enabling the energy storage module to start up and supply power to the main load, conversion module, and other low-voltage modules of the power supply module when there is no grid input, achieving emergency start-up and ensuring the operation of the power supply system when there is no grid. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the power supply system in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the power grid supply mode in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the energy storage power supply mode in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram of the mobile power supply mode in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the vehicle-mounted DC / OBC in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100, Energy storage module; 110, Energy storage unit; 120, DC transformer; 122, First switch; 123, Start switch; 130, First power supply connection terminal; 140, Second power supply connection terminal; 200, Power supply device; 210, Conversion module; 220, Grid connection terminal; 230, Terminal connection terminal; 240, Second switch; 250, Mobile connection terminal; 260, Main unit load; 270, AC transformer; 280, Terminal module. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Example 1:

[0041] like Figure 1 As shown, Embodiment 1 of this application provides an energy storage module 100, including:

[0042] DC transformer 120;

[0043] Energy storage unit 110 is connected to the first end of DC transformer 120;

[0044] The first power supply connection terminal 130 is connected to the second end of the DC transformer 120, and the first power supply connection terminal 130 is suitable for connecting the power supply device 200.

[0045] By adding a DC transformer 120 to the energy storage module 100, the high-voltage electricity from the energy storage unit 110 is converted into low-voltage electricity through the DC transformer 120 and then output to the power supply device 200 through the first power supply connection terminal 130, providing the power supply device 200 with the required low-voltage electricity. Thus, in the absence of grid input, the energy storage module 100 is started to supply power to the main load 260 of the power supply module, the conversion module 210 and other low-voltage modules, realizing emergency start-up and ensuring the operation of the power supply system when there is no grid. This solves the technical defect of traditional power supply systems where low-voltage loads lose power and the system cannot maintain basic operation when there is no grid.

[0046] By directly connecting the DC transformer 120 between the first power supply connection terminal 130 and the energy storage unit 110, energy can be directly extracted from the energy storage unit 110 (300V-1000V) and efficiently converted into low-voltage DC power (12V-48V) required by the power supply module.

[0047] The energy storage unit 110 can be composed of multiple lithium iron phosphate cells. The output terminal of the energy storage unit 110 can be connected to the energy storage connection terminal of the power supply device 200 via a fuse or a contactor. The contactor is controlled by the controller and closes with a delay when the system starts up to avoid inrush current.

[0048] The first power supply connection terminal 130 adopts an aviation plug or quick-plug terminal structure, with reverse connection protection, mis-plugging protection, and IP67 protection rating, ensuring reliable connection in outdoor or extreme environments. This structural design allows the power supply system to maintain control logic operation and thermal management functions even when completely disconnected from the power grid (such as in power-free areas at night, post-disaster power outages, or mobile charging stations operating off-grid), avoiding the risk of system downtime or battery thermal runaway due to low-voltage power outages.

[0049] The DC transformer 120 can be a miniature high-frequency isolated DC-DC module. Through GaN power devices and magnetic integration technology, the first end of the DC transformer 120 is connected to the energy storage unit 110, and the second end of the DC transformer 120 is connected to the first power supply connection terminal 130 to provide energy to the load of the power supply module and to provide starting power to the conversion module 210 of the power supply module.

[0050] In some alternative embodiments, the energy storage module 100 further includes a second power supply connection terminal 140, which is connected to the energy storage unit 110 and is adapted to connect to the power supply device 200.

[0051] In some alternative embodiments, the energy storage module 100 further includes a first switch 122, which is disposed between the energy storage unit 110 and the second power supply connection terminal 140. The first switch 122 is used to control the connection between the energy storage unit 110 and the second power supply connection terminal 140.

[0052] The DC transformer 120 also includes an emergency controller, which is configured to close the first switch 122 after the conversion module 210 is started. The first switch 122 is used to control the connection between the energy storage unit 110 and the second power supply connection terminal 140 to realize the activation and deactivation of the energy storage power supply mode.

[0053] In some alternative embodiments, the DC transformer 120 further includes a start switch 123, the first end of which is connected to the second end of the DC transformer 120 and the first power supply connection terminal 130. The start switch 123 is used to control the connection between the DC transformer 120 and the first power supply connection terminal 130.

[0054] The start switch 123 can be a mechanical self-locking button, installed in a conspicuous position on the equipment casing, with a normally open dry contact connected in series inside to control the MOSFET switch on the input side of the DC transformer 120. In the event of a power grid failure, manually pressing the button allows the high voltage of the energy storage unit 110 to supply power to the power supply module via the DC transformer 120, achieving "physical-level forced wake-up".

[0055] The main function of DC transformer 120 is to provide a 12V wake-up power supply. DC transformer 120 draws constant power from energy storage unit 110. After the start switch 123 is pressed, DC transformer 120 converts the high-voltage DC power (e.g., 580V-850V) input from energy storage unit 110 into low-voltage DC power (e.g., 12V-48V). First, DC transformer 120 provides low-voltage DC power to the power supply module to wake up conversion module 210. After conversion module 210 is operational, DC transformer 120 controls the first switch 122 to close, and then outputs high-voltage DC power (e.g., 580V-850V) from energy storage unit 110 directly to power the power supply module. Thus, DC transformer 120 completes the emergency start function under conditions where the low-voltage system is not operating and there is no low-voltage power input.

[0056] Example 2:

[0057] Embodiment 2 of this application provides a power supply system, including:

[0058] Power supply device 200,

[0059] The energy storage module 100 is connected to the energy storage connection terminal of the power supply device 200.

[0060] By deeply integrating the aforementioned power supply device 200 with the energy storage module 100, an integrated energy management unit is formed. The energy storage module 100 may contain lithium iron phosphate battery cells, achieving high power output capability through a series-parallel topology. After the high-voltage electricity from the energy storage unit 110 is converted to low-voltage electricity by the DC transformer 120, it is output to the power supply device 200 through the first power supply connection terminal 130, providing the power supply device 200 with the required low-voltage electricity. Thus, in the absence of grid input, the energy storage module 100 is activated to supply power to the main load 260 of the power supply module, the conversion module 210, and other low-voltage modules, achieving emergency start-up and ensuring the operation of the power supply system when there is no grid input.

[0061] In some alternative embodiments, the power supply device 200 includes a conversion module 210, with an energy storage connection terminal connected to a first terminal of the conversion module 210; the conversion module 210 is used to convert the voltage magnitude and / or form of electrical energy input to the energy storage connection terminal, and the energy storage connection terminal is connected to a second power supply connection terminal 140 of the energy storage module.

[0062] The conversion module is used to convert the voltage input to the energy storage connection terminal. In other words, it boosts or bucks the input voltage before outputting it, thus achieving a difference between the input and output voltage levels. The conversion module also converts the form of electrical energy input to the energy storage connection terminal, that is, it converts the form of electrical energy at the input terminal to the form of electrical energy at the output terminal. The form of electrical energy generally refers to the way electrical energy exists in different physical states or forms. In the fields of science and engineering, electrical energy is mainly used as a medium for energy conversion and transmission, but its specific form can vary depending on the application scenario. Typically, electrical energy is mainly manifested in the form of electric current, such as direct current (DC), alternating current (AC), or high-frequency current, and can be converted between each other.

[0063] The conversion module 210 includes a first AC transformer, and the first end of the first AC transformer is connected to the energy storage connection end.

[0064] The first end of the first AC transformer is directly connected to the high-voltage DC bus of the energy storage connection end. It is converted into a high-frequency AC signal by the full-bridge inverter and output from the second end of the first AC transformer. The high-frequency AC signal is then transmitted to the terminal connection end 230 to supply power to the load in the terminal module, thereby realizing the energy storage power supply mode.

[0065] The high-frequency AC signal from the mobile connection terminal 250 is input at the second terminal of the first AC transformer. It is converted into a high-voltage DC signal by the full-bridge inverter and then output from the first terminal of the first AC transformer to the DC transformer 120. After being stepped down by the DC transformer 120, a low-voltage DC signal is output to the energy storage connection terminal or the host load 260.

[0066] The first AC transformer can adopt a high-frequency soft-switching LLC topology. This structure eliminates the bulky iron core and low-frequency hysteresis loss of traditional power frequency transformers. It uses nanocrystalline soft magnetic materials and planar transformer technology, which has the advantages of small size and high efficiency.

[0067] The conversion module 210 also includes a DC transformer 120, the first end of which is connected to the energy storage connection terminal, or the first end of the DC transformer 120 is connected to the first end of the first AC transformer.

[0068] The DC transformer 120 can be a bidirectional isolated DC-DC converter. The first end of the DC transformer 120 is connected to the energy storage connection end. The high-voltage DC signal input to the energy storage connection end is converted by the DC transformer 120 and output as a low-voltage DC signal. The second end of the DC transformer 120 is connected to the third end of the host load 260, thereby ensuring the normal operation of the host load 260 in the power supply device 200.

[0069] The second end of the DC transformer 120 is connected to the second end of the first AC transformer. The high-voltage DC signal output from the second end of the first AC transformer is input from the first end of the DC transformer 120 and then output as a low-voltage DC signal through the second end of the DC transformer 120, thereby enabling the mobile energy storage device to provide low-voltage current to the host load 260.

[0070] The low-voltage DC signal output from the second end of the DC transformer 120 can also be sent to the circuit board inside the conversion module 210 to power the operation of the circuit board, thereby realizing the full start-up of the low-voltage part of the power supply device 200.

[0071] like Figure 5 As shown, the first AC transformer uses an on-board charger, and the DC transformer 120 is a DC-DC converter. In this case, existing integrated on-board DC / OBCs can be directly used, effectively reducing the size of the power supply unit 200, lowering R&D costs, and improving device adaptability and assembly efficiency. The addition of an on-board DC / OBC allows the stored high-voltage electricity to be converted into the voltage required by the main unit and terminal loads when there is no grid input, facilitating the operation of the overall system when there is no grid connection.

[0072] In some alternative embodiments, the power supply device 200 further includes a power grid connection terminal 220, which is adapted to connect to a power grid.

[0073] The grid connection terminal 220 can be connected to the mains power (AC 220V / 380V). After the conversion module 210 adjusts the path, it outputs low-voltage DC power to the host load 260 to realize the normal operation of the load inside the power supply device 200.

[0074] In some alternative embodiments, the power supply device 200 further includes a terminal connection 230, which is connected to the second end of the conversion module 210.

[0075] This structure enables bidirectional energy routing across three ports: the grid connection terminal 220 can connect to mains power (AC 220V / 380V), and after the conversion module 210 adjusts the path, it outputs AC power to the terminal connection terminal 230 to power the load within the terminal module 280, thus achieving grid power supply mode. In the absence of a grid, the high-voltage DC power from the energy storage connection terminal is inverted into AC power by the conversion module 210 and supplied to the terminal connection terminal 230, enabling the energy storage module 100 to power the load within the terminal module 280.

[0076] In some alternative embodiments, the power supply device 200 further includes a second switch 240, the first end of which is connected to the power grid connection terminal 220, and the second end of which is connected to the second end of the conversion module 210.

[0077] The second switch 240 is used to control the connection between the grid connection terminal 220 and the second terminal of the conversion module 210, thereby enabling the switching on and off of the grid power supply mode. The second switch 240 is also used to control the connection between the grid connection terminal 220 and the second terminal of the conversion module 210, thereby enabling the switching between grid power supply mode and energy storage power supply mode. Finally, the second switch 240 is used to control the connection between the grid connection terminal 220 and the mobile connection terminal 250, thereby enabling the switching between grid power supply mode and mobile power supply mode.

[0078] With both the first switch 122 and the second switch 240 open, the mobile connection terminal 250 is connected to an external vehicle, and the power supply system is in mobile power supply mode.

[0079] In some alternative embodiments, the power supply device 200 further includes a mobile connection terminal 250, which is adapted to connect a mobile energy storage device and is connected to the second end of the second switch 240.

[0080] The mobile connection terminal 250 can adopt a standard AC charging and discharging interface, allowing connection to an external mobile energy storage vehicle or portable energy storage power supply. When an external mobile energy storage device is connected, the controller detects the output voltage and polarity of the device. If the system access conditions are met, the controller automatically closes the path from the second switch 240 to the mobile connection terminal 250, enabling the external mobile energy storage device to supply power to the terminal connection terminal 230 via the conversion module 210, thus powering the load within the terminal module 280 and achieving terminal power supply mode. This design provides more charging options for the low-voltage loads of the terminal module in situations where the energy storage module 100 has insufficient power, the grid power supply is unstable, or there is no grid, improving the ease of use of the power supply device 200.

[0081] In some alternative embodiments, the power supply device 200 further includes a host load 260, which is connected to the third terminal of the conversion module 210.

[0082] The main load 260 is connected to the third terminal of the conversion module 210. The main load 260 is an auxiliary device inside the charging pile, including the main control unit, communication module, human-machine interface screen, and cooling fan. Its rated operating voltage is usually low voltage, and it is directly powered by the low voltage DC bus output from the DC-DC converter in the switching module, ensuring that the system status record and safe shutdown process can still be maintained after the power grid is cut off.

[0083] In some alternative embodiments, the power supply device 200 also includes an AC transformer 270, the first end of which is connected to the power grid connection terminal 220.

[0084] AC transformer 270 (ACDC) is a high-frequency isolated inverter transformer. Its primary side is connected to the DC output terminal of energy storage module 100, and its secondary side outputs 220V / 50Hz sinusoidal AC power. After LC filtering, the AC power is connected to the power supply output terminal (not shown in the figure). The power supply output terminal is connected to the terminal module 280 to provide high-voltage DC power to the terminal module, thereby charging the vehicle to be charged through the terminal module 280. When in energy storage power supply mode, the AC transformer 270 can be reverse pre-charged using the low-voltage power provided by the energy storage unit, thereby reducing the number of pre-charge boards, saving costs, and improving equipment lifespan.

[0085] In some alternative implementations, the power supply system further includes a terminal module 280, the input of which is connected to a terminal connection terminal 230.

[0086] The terminal module 280 serves as the energy interface between the power supply device 200 and the vehicle. Its input terminal is directly connected to the terminal connection terminal 230 and the power output terminal of the power supply device 200. The current input from the terminal connection terminal 230 to the terminal module 280 supplies power to the loads within the terminal module 280, ensuring its normal operation. The loads within the terminal module 280 include, but are not limited to, the thermal management system and control system within the terminal module. The current input from the power output terminal 230 to the terminal module 280 charges the vehicle to be charged, thereby enabling the grid to charge the vehicle.

[0087] The terminal module 280 integrates a voltage / current sampling circuit, a communication protocol controller, an insulation detection unit, and a contactor drive circuit. When the power supply device 200 switches to energy storage power supply mode, the terminal module 280 automatically identifies changes in the input voltage and dynamically adjusts the charging current curve to ensure constant power supply to the load inside the terminal module 280 even as the energy storage voltage drops. For example, when the energy storage voltage drops from 380V to 320V, the terminal module 280 gradually increases the charging current from 80A to 95A to maintain a 30kW output and extend the effective charging time. This design significantly improves charging efficiency under energy storage power supply and avoids a sudden drop in charging power due to voltage decreases.

[0088] Terminal module 280 includes a fast charging terminal and a flash charging terminal. The fast charging terminal is suitable for passenger cars and light commercial vehicles, and can adopt a dual-gun independent control architecture, supporting a maximum DC output of 120kW, with each gun capable of outputting 60kW. The flash charging terminal supports ultra-high-speed charging (such as 350kW), and can integrate liquid-cooled cables, active temperature control contactors, or multi-level capacitor buffer circuits internally.

[0089] In some alternative embodiments, the power supply device 200 further includes a controller configured to control the power supply device 200 to be in grid power supply mode, energy storage power supply mode, or mobile power supply mode.

[0090] The controller can use a high-reliability industrial-grade MCU with an ARM Cortex-M7 core and a built-in dual-channel ADC for real-time sampling of grid voltage, current, frequency, and the voltage status of the 10031SOC energy storage module.

[0091] The controller can determine the power supply status through a preset algorithm: when the current voltage of the power grid is less than the preset voltage, such as the preset voltage being 85% or 115% of the rated voltage, and continues for more than a preset time, such as 100ms, 200ms, or 300ms, it is determined that the power grid is abnormal and the energy storage power supply mode is switched; or, the controller can determine the power supply status through a preset algorithm if the current charging frequency of the power grid deviates from the preset frequency by a certain value, such as ±1Hz, and continues for more than a preset time, it is determined that the power grid is abnormal and the energy storage power supply mode is switched.

[0092] The switching logic can adopt a "disconnect first, connect later" strategy to ensure that after disconnecting the grid path, the energy storage path is connected after a 5ms dead zone delay to avoid short circuits.

[0093] The controller can also integrate a soft-start function, which increases the output voltage in a linear ramp manner when starting the energy storage power supply mode to prevent surge current from impacting the host load 260. In addition, the controller supports remote communication and can upload power supply mode switching events, remaining energy storage capacity, and fault codes to the cloud platform to realize operation and maintenance early warning and remote diagnosis.

[0094] In some alternative implementations, the controller is connected to the second switch 240, and in the grid power supply mode, the second switch 240 is disconnected; or, in the energy storage power supply mode, the second switch 240 is connected; or, in the mobile power supply mode, the second switch 240 is connected.

[0095] In some optional implementations, the controller is connected to the conversion module 210, and the energy storage power supply mode is as follows: the first end of the conversion module 210 is connected to the energy storage connection end, and the second end of the conversion module 210 is connected to the terminal connection end 230.

[0096] like Figure 2As shown, the second switch 240 between the conversion module 210 and the phase line is disconnected, and the power grid is directly connected to the power supply device 200. The power supply device 200 is connected to the energy storage module 100 and the terminal module 280. 220V AC power is supplied to the load in the terminal module 280 through the power grid to maintain the normal operation of the terminal module 280, improving its service life and ease of use. Since the power supply device 200 and the energy storage module 100 are usually placed adjacent to each other, they are less affected by wiring harness transmission loss and voltage difference. Therefore, the 220V to 12V auxiliary power source inside the power supply device 200 can be eliminated, saving cost and space. The high voltage from the energy storage battery is directly converted to 12V low voltage through the DC in the vehicle's DC / OBC to power the main load 260 and the load in the energy storage module 100.

[0097] like Figure 3 As shown, the DC transformer 120 is directly connected to the energy storage battery. There is no switch between the DC transformer 120 and the energy storage battery, meaning that the DC transformer 120 is always connected to high voltage. When the start switch 123 is pressed, the DC transformer 120 will provide a small current (such as 12V-48V) to power the load inside the energy storage module 100 and wake up the vehicle DC / OBC. After the first switch 122 is activated, the vehicle DC / OBC converts the high voltage of the energy storage unit 110 into 12V to power the load inside the energy storage module 100 and the host load 260. At the same time, the second switch 240 is activated, and the vehicle DC / OBC converts the high voltage of the energy storage unit 110 into 220V AC to power the load inside the terminal module 280.

[0098] like Figure 4 As shown, when the energy storage unit 110 has a low power level, in order to reduce the power consumption of the energy storage unit 110, this application also reserves a mobile connection terminal 250. The mobile connection terminal 250 connects to an external vehicle to supply power to various loads in the power supply system via V2L discharge (the vehicle provides power to the external load). When discharging via V2L, the second switch 240 is activated, and the 220V AC power input from the external vehicle supplies power to the load in the terminal module 280 and replenishes the energy storage unit 110. Simultaneously, the start switch 123 in the energy storage module 100 is pressed, and the DC transformer 120 provides a small current and 12V to wake up and start the vehicle DC / OBC. The high-voltage power of the energy storage unit 110 is converted to 12V via DC to supply power to the load in the energy storage module 100 and the host load 260.

[0099] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An energy storage module (100), characterized in that, include: DC transformer (120); An energy storage unit (110) is connected to the first end of the DC transformer (120); The first power supply connection terminal (130) is connected to the second end of the DC transformer (120), and the first power supply connection terminal (130) is adapted to connect to the power supply device (200).

2. The energy storage module (100) as described in claim 2, characterized in that, The energy storage module (100) further includes a second power supply connection terminal (140), which is connected to the energy storage unit (110) and is adapted to connect to a power supply device (200).

3. The energy storage module (100) as described in claim 3, characterized in that, The energy storage module (100) further includes a first switch (122), the first end of the first switch (122) is connected to the energy storage unit (110), the first end of the first switch (122) is connected to the second power supply connection terminal (140), and the first switch (122) is used to control the connection between the energy storage unit (110) and the second power supply connection terminal (140).

4. The energy storage module (100) as described in claims 1-3, characterized in that, The energy storage module (100) also includes a start switch (123), one end of which is connected to the second end of the DC transformer (120), and the other end of which is connected to the first power supply connection terminal (130). The start switch (123) is used to control the connection between the DC transformer (120) and the first power supply connection terminal (130).

5. A power supply system, characterized in that, include: Power supply device (200). The energy storage module (100) as described in any one of claims 1-4, wherein the energy storage connection terminal of the power supply device (200) is connected to the energy storage module (100).

6. The power supply system as described in claim 5, characterized in that, The power supply device (200) includes a conversion module (210), and the energy storage connection terminal is connected to the first end of the conversion module (210); the conversion module (210) is used to convert the voltage magnitude and / or form of electrical energy input to the energy storage connection terminal, and the energy storage connection terminal is connected to the second power supply connection terminal (140) of the energy storage module (100).

7. The power supply system as described in claim 6, characterized in that, The power supply device (200) further includes a power grid connection terminal (220), which is adapted to connect to the power grid; And / or, the power supply device (200) further includes a terminal connection (230) connected to a second end of the conversion module (210).

8. The power supply system as described in claim 7, characterized in that, The power supply device (200) further includes a second switch (240), the first end of which is connected to the power grid connection terminal (220), and the second end of which is connected to the second end of the conversion module (210).

9. The power supply system as described in claim 8, characterized in that, The power supply device (200) further includes a mobile connection terminal (250), which is adapted to connect a mobile energy storage device and is connected to the second end of the second switch (240).

10. The power supply system as described in claim 8, characterized in that, The power supply device (200) also includes a host load (260), which is connected to the third end of the conversion module (210); And / or, the power supply device (200) further includes an AC transformer (270), the first end of which is connected to the power grid connection terminal (220); And / or, the power supply system further includes a terminal module (280), the input of which is connected to the terminal connection terminal (230).

11. The power supply system as described in claim 9 or 10, characterized in that, The power supply device (200) also includes a controller, which is configured to control the power supply device (200) to be in grid power supply mode, energy storage power supply mode, or mobile power supply mode.

12. The power supply system as described in claim 12, characterized in that, The controller is connected to the second switch (240). The grid power supply mode is to control the second switch (240) to be disconnected; or, the energy storage power supply mode is to control the second switch (240) to be connected; or, the mobile power supply mode is to control the second switch (240) to be connected.

13. The power supply system as described in claim 13, characterized in that, The controller is connected to the conversion module (210), and the energy storage power supply mode is as follows: the first end of the conversion module (210) is connected to the energy storage connection end, and the second end of the conversion module (210) is connected to the terminal connection end (230).

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