Energy supply device, power consuming device, and energy interaction system

Abstract

The application discloses an energy supply device, an electric device and an energy interaction system. The energy supply device is used for charging an energy storage unit of the electric device. The heating type of the heating mode includes at least one of discharging heating and charging and discharging heating. In the discharging heating process, the energy storage unit discharges to the energy supply device. In the charging and discharging heating process, the energy storage unit and the energy supply device are alternately charged and discharged. The energy supply device comprises an electric energy receiving part. The electric energy receiving part is used for receiving the electric energy released from the energy storage unit to the energy supply device at least in the case of the discharging heating and / or the charging and discharging heating. In this way, the energy storage unit discharges to the energy supply device, and the energy storage unit can be heated and warmed up through internal resistance, and the warming-up speed is faster.

Description

Technical Field

[0001] This application relates to the field of energy supply technology, and more specifically, to an energy supply device, an electrical appliance, and an energy interaction system. Background Technology

[0002] Charging energy storage units is difficult in cold environments. Related technologies often employ external heating solutions for low-temperature environments, such as electric auxiliary heating or heat pump systems. However, these heating technologies are too slow. Summary of the Invention

[0003] This application provides an energy supply device, an electrical device, and an energy interaction system.

[0004] In a first aspect, this application provides an energy supply device for charging an energy storage unit of an electrical device. The energy storage unit has a heating mode, and the heating type of the heating mode includes at least one of discharge heating and charge-discharge heating. During the discharge heating process, the energy storage unit discharges to the energy supply device, and during the charge-discharge heating process, the energy storage unit and the energy supply device alternately charge and discharge. The energy supply device includes an energy receiving unit, which is at least used to receive electrical energy released by the energy storage unit to the energy supply device in the case of discharge heating and / or charge-discharge heating.

[0005] With this type of discharge heating or charge-discharge heating, the energy storage unit can heat up through internal resistance, resulting in a faster heating rate.

[0006] In some possible implementations, the heating type of the heating mode may be selected from one or more of the discharge heating and the charge-discharge heating.

[0007] In some possible implementations, the selection of the heating type is based on one or more of the following: the SOC threshold of the energy storage unit, the temperature of the energy storage unit, the ambient temperature, the voltage of the energy storage unit, the voltage of a single cell of the energy storage unit, and the temperature of the energy storage device of the energy supply equipment.

[0008] In some possible implementations, the conditions for entering the discharge heating include one or more of the following: the SOC of the energy storage unit is higher than a first SOC threshold, the temperature of the energy storage unit is lower than a first temperature threshold, the voltage of the energy storage unit is higher than a first voltage threshold, and the voltage of a single cell of the energy storage unit is greater than or equal to a first cell voltage threshold.

[0009] In some possible implementations, the conditions for entering the charge-discharge heating include one or more of the following: the SOC of the energy storage unit is higher than a second SOC threshold, the temperature of the energy storage unit is lower than a first temperature threshold, the voltage of the energy storage unit is greater than or equal to the first cell voltage threshold, the temperature of the energy storage device of the energy supply equipment is lower than a third temperature threshold, and the first SOC threshold is greater than the second SOC threshold.

[0010] In some possible implementations, the conditions for exiting the heating mode include one or more of the following: the SOC of the energy storage unit is lower than a third SOC threshold, the temperature of the energy storage unit is higher than a second temperature threshold, the voltage of the energy storage unit is lower than a first voltage threshold, and the voltage of any single cell of the energy storage unit is lower than a first cell voltage threshold.

[0011] In some possible implementations, the discharge heating includes at least one of constant current discharge and constant voltage discharge.

[0012] In some possible implementations, the charge-discharge heating includes at least one or more of positive pulse heating, negative pulse heating, and bipolar pulse heating. During the positive pulse heating process, the SOC of the energy storage unit shows an upward trend; during the negative pulse heating process, the SOC of the energy storage unit shows a downward trend; and during the bipolar pulse heating process, the SOC of the energy storage unit remains essentially unchanged.

[0013] In some possible implementations, during the discharge heating process, constant current discharge and / or constant voltage discharge may be selected; the selection is based on one or more of the following: the voltage of a single cell of the energy storage unit, and the voltage of the energy storage unit.

[0014] In some possible implementations, during the charge-discharge heating process, one or more of positive pulse heating, negative pulse heating, and bipolar pulse heating can be selected for charge-discharge heating, and the selection is based on one or more of the following: the temperature of the energy storage unit, the state of charge (SOC) of the energy storage unit, the temperature of the energy storage device of the energy supply device, and the SOC of the energy storage device of the energy supply device.

[0015] In some possible implementations, during the discharge heating process, the constant current discharge is performed first, and when the voltage of a single cell in the energy storage unit approaches or reaches a first cell voltage threshold, the current is reduced so that the voltage of a single cell in the energy storage unit is maintained at or above the first cell voltage threshold.

[0016] In some possible implementations, during the charge-discharge heating process, the condition for entering the negative pulse heating includes: the SOC of the energy storage unit is greater than a fourth SOC threshold.

[0017] In some possible implementations, during the charge-discharge heating process, the conditions for entering the positive pulse heating include one or more of the following: the SOC of the energy storage unit is less than a fourth SOC threshold, the SOC of the energy storage device of the energy supply device is greater than the upper limit threshold of energy storage, and the temperature of the energy storage device of the energy supply device is lower than a third temperature threshold.

[0018] In some possible implementations, the heating scheme of the heating mode may be at least one of the following: Scheme 1: only perform the discharge heating; Scheme 2: first perform the discharge heating and then perform the charge-discharge heating; Scheme 3: first perform the charge-discharge heating and then perform the discharge heating; Scheme 4: only perform the charge-discharge heating.

[0019] In some possible implementations, the heating mode is selectable; the heating mode can be selected as one or more of Scheme 1, Scheme 2, Scheme 3, and Scheme 4.

[0020] In some possible implementations, the selection of the heating scheme is based on one or more of the following: the SOC threshold of the energy storage unit, the temperature of the energy storage unit, the ambient temperature, the temperature of the energy storage device of the energy supply equipment, and the SOC of the energy storage device of the energy supply equipment.

[0021] In some possible implementations, the entry conditions of Scheme 1 include one or more of the following: the temperature of the energy storage unit is less than a first temperature threshold, and the SOC of the energy storage unit is greater than or equal to a first SOC threshold.

[0022] In some possible implementations, the entry conditions for Scheme 2 include one or more of the following: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is greater than the second SOC threshold.

[0023] In some possible implementations, the entry conditions for scheme 3 include: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is less than the second SOC threshold.

[0024] In some possible implementations, the entry condition for scheme 4 includes that the temperature of the energy storage unit is less than the first temperature threshold.

[0025] In some possible implementations, scheme 4 includes at least one of the following sub-schemes: scheme 4-1: negative pulse heating; scheme 4-2: positive pulse heating; scheme 4-3: bipolar pulse heating.

[0026] In some possible implementations, the entry conditions for scheme 4-1 include: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is greater than the fourth SOC threshold.

[0027] In some possible implementations, the entry conditions for scheme 4-2 include: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is less than or equal to the fourth SOC threshold.

[0028] In some possible implementations, the condition for entering scheme 4-3 includes: the temperature of the energy storage unit is less than the first temperature threshold.

[0029] In some possible implementations, the energy supply device includes an energy storage device, the power receiving unit is connected to the energy storage device, and the energy storage device is used to store at least a portion of the electrical energy released by the energy storage unit to the energy supply device in the case of discharge heating and / or charge-discharge heating.

[0030] In some possible implementations, the power receiving unit is connected to the power grid, and in the case of discharge heating and / or charge-discharge heating, the power receiving unit transmits at least a portion of the electrical energy released by the energy storage unit to the energy supply device to the power grid.

[0031] In some possible implementations, the power receiving unit includes an energy conversion device for: converting the voltage output by the energy storage unit into a voltage that matches the energy storage device and / or the power grid during discharge heating.

[0032] In some possible implementations, during charge-discharge heating: the voltage output by the energy storage unit is converted to a voltage that matches the energy storage device and / or the power grid; and the voltage output by the energy storage device and / or the power grid is converted to a voltage that matches the energy storage unit.

[0033] In some possible implementations, the energy conversion device includes multiple DC-DC converters.

[0034] In some possible implementations, the DC-DC converter adjusts the ratio of the first voltage to the second voltage and / or the ratio of the first voltage to the third voltage by adjusting the coil winding ratio.

[0035] In some possible implementations, the energy supply device further includes a first control device connected to the energy conversion device. The first control device is used to acquire the operating parameters of the energy storage unit and control the discharge heating process.

[0036] In some possible implementations, the operating parameters of the energy storage unit include at least one of the following: ambient temperature, temperature of the energy storage unit, current, voltage of a single cell of the energy storage unit, total voltage of the energy storage unit, state of charge (SOC) of the energy storage unit, temperature of the energy storage device of the energy supply equipment, and SOC of the energy storage device of the energy supply equipment.

[0037] In some possible implementations, the first control device is further configured to: after detecting that the electrical device and the energy supply device have completed the charging connection confirmation, and if the conditions for entering the discharge heating are met, control the energy storage unit to discharge to the energy supply device; if the conditions for entering the charge-discharge heating are met, control the energy storage unit and the energy supply device to alternately charge and discharge; and / or if the conditions for exiting the heating mode are met, control to stop exiting the heating mode.

[0038] In some possible implementations, the energy storage device has a greater energy storage capacity than the energy storage unit.

[0039] In some possible implementations, the energy supply device includes a plurality of the energy storage devices.

[0040] In some possible implementations, the energy supply device can be connected to the energy storage units of multiple electrical devices and can store the electrical energy released by the multiple energy storage units to the energy supply device when all of the multiple energy storage units are in discharge heating and / or charge-discharge heating.

[0041] In some possible implementations, the energy supply device further includes a host and a terminal, the energy storage unit is connected to the host through the terminal, and the power receiving unit is deployed on the terminal; at least one of the energy storage device and the first control device of the energy supply device is deployed on the host; / or the terminal is connected to the electrical device through the charging gun of the electrical device, and the charging gun is connected to the energy storage unit.

[0042] In some possible implementations, the terminal is configured to enable information and energy interaction between the electrical device and the energy supply device.

[0043] Secondly, this application provides an electrical device including an energy storage unit, which provides energy to the electrical components of the device. The energy storage unit has a heating mode, and the heating type of the heating mode includes at least one of discharge heating and charge-discharge heating. During the discharge heating process, the energy storage unit discharges to the energy supply device. During the charge-discharge heating process, the energy storage unit and the energy supply device alternately charge and discharge.

[0044] In some possible implementations, the conditions for entering the discharge heating include one or more of the following: the SOC of the energy storage unit is higher than a first SOC threshold, the temperature of the energy storage unit is lower than a first temperature threshold, the voltage of the energy storage unit is higher than a first voltage threshold, and the voltage of a single cell of the energy storage unit is greater than or equal to a first cell voltage threshold.

[0045] In some possible implementations, the conditions for entering the charge-discharge heating include one or more of the following: the SOC of the energy storage unit is lower than a first SOC threshold, the SOC of the energy storage unit is higher than a second SOC threshold, the temperature of the energy storage unit is lower than the first temperature threshold, the voltage of the energy storage unit is greater than or equal to the first cell voltage threshold, and the first SOC threshold is greater than the second SOC threshold.

[0046] In some possible implementations, the conditions for exiting the heating mode include one or more of the following: the SOC of the energy storage unit is lower than a third SOC threshold, the temperature of the energy storage unit is higher than a second temperature threshold, the voltage of the energy storage unit is lower than a first voltage threshold, and the voltage of a single cell of the energy storage unit is lower than a first cell voltage threshold.

[0047] In some possible implementations, the electrical equipment further includes a second control device for controlling the exit of the heating mode when conditions for exiting the heating mode are met.

[0048] In some possible implementations, the electrical equipment is a vehicle.

[0049] In some possible implementations, the energy supply device is the energy supply device of any of the embodiments of the first aspect described above.

[0050] Thirdly, this application also provides an energy interaction system, including the energy supply device and the electrical equipment described in any of the above embodiments.

[0051] In some possible implementations, the electrical equipment is a vehicle.

[0052] In some possible implementations, the energy supply device is the energy supply device of any of the embodiments of the first aspect described above.

[0053] Thirdly, this application also provides an energy interaction system, including the energy supply device and the electrical equipment described in any of the above embodiments. Attached Figure Description

[0054] Figure 1A This is a current diagram of the discharge heating scheme according to an embodiment of this application.

[0055] Figure 1B yes Figure 1A The current diagram corresponds to the voltage diagram.

[0056] Figure 1C This is a current diagram of a discharge heating scheme according to another embodiment of this application.

[0057] Figure 1D yes Figure 1C The current diagram corresponds to the voltage diagram.

[0058] Figure 2 This is a schematic diagram of the current in the charging and discharging heating scheme of this application embodiment.

[0059] Figure 3 This is a current diagram of a charging and discharging heating scheme according to another embodiment of this application.

[0060] Figure 4 This is a current diagram of a charging and discharging heating scheme according to another embodiment of this application.

[0061] Figure 5 This is a schematic diagram of the energy exchange system according to an embodiment of this application.

[0062] Figure 6 This is a schematic diagram of the current in scheme 2 of the heating mode according to an embodiment of this application.

[0063] Figure 7 This is a schematic diagram of the current in scheme 3 of the heating mode according to an embodiment of this application. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application.

[0065] The technical solution of this application includes an energy interaction system. The energy interaction system includes energy supply equipment and electrical equipment.

[0066] Electrical equipment may include, but is not limited to, vehicles. The electrical equipment includes at least an energy storage unit for storing electrical energy and providing power to the electrical components of the equipment. The energy storage unit has a heating mode. This allows the energy storage unit to be heated in low-temperature environments, ensuring it can be charged.

[0067] Optionally, the energy storage unit in this application embodiment may be an energy storage pack containing multiple battery cells.

[0068] Energy supply equipment can charge the energy storage units of electrical appliances. Energy supply equipment can be connected to the power grid. Energy supply equipment can be, for example, but is not limited to, charging equipment.

[0069] In scenarios where the energy storage unit of an electrical device is being charged, the energy supply device (e.g., a charging device) is connected to the energy storage unit of the electrical device. This application provides a heating scheme for the energy storage unit of an electrical device: the energy storage unit discharges or charges / discharges to the energy supply device to raise the temperature of the energy storage unit.

[0070] During the discharge heating process, the energy storage unit discharges to the energy supply device. In one possible implementation, the current diagram for discharge heating is shown in Figure 1.

[0071] During the charging and discharging heating process, the energy storage unit and the energy supply device alternately charge and discharge. In one possible implementation, the current diagram for charging and discharging heating is as follows: Figure 2 As shown.

[0072] With this type of discharge heating or charge-discharge heating, the energy storage unit can heat up through internal resistance, resulting in a faster heating rate.

[0073] In the embodiments of this application, the heating mode of the energy storage unit includes at least one of the above-mentioned discharge heating or charge-discharge heating.

[0074] The conditions for entering the heating mode include at least one of the conditions for entering discharge heating and the conditions for entering charge-discharge heating.

[0075] In some possible implementations, the conditions for entering discharge heating include one or more of the following: the temperature of the energy storage unit is below a first temperature threshold, the state of charge (SOC) of the energy storage unit is above a first SOC threshold, the voltage of the energy storage unit is above a first voltage threshold, and the voltage of a single cell in the energy storage unit is greater than or equal to a first cell voltage threshold. For example, discharge heating can be initiated when the temperature of the energy storage unit is below the first temperature threshold and the SOC of the energy storage unit is above the first SOC threshold.

[0076] Optionally, the first SOC threshold is ≥15%, for example, the first SOC threshold can be, but is not limited to, 15%, 18%, 20%, 25%, 30%, 35%, etc.

[0077] Optionally, the first temperature threshold is ≤10℃, for example, the first temperature threshold can be, but is not limited to, 0℃, 5℃, 10℃, etc.

[0078] In some possible implementations, the conditions for entering charge / discharge heating include one or more of the following: the SOC of the energy storage unit is higher than a second SOC threshold, the temperature of the energy storage unit is lower than a first temperature threshold, the voltage of the energy storage unit is greater than or equal to a first cell voltage threshold, and the temperature of the energy storage device of the energy supply equipment is lower than a third temperature threshold. When the temperature of the energy storage device of the energy supply equipment is lower than the third temperature threshold, entering charge / discharge heating can heat the energy storage device.

[0079] Optionally, the second SOCSOC threshold is ≥1%, for example, but not limited to 1%, 2%, 5%, 10%, etc.

[0080] The first cell voltage threshold is ≥0.8V, for example, it can be, but is not limited to, 0.8V, 0.9V, 1V, etc.

[0081] In some possible implementations, the exit conditions for exiting the heating mode include one or more of the following: the SOC of the energy storage unit is lower than a third SOC threshold, the temperature of the energy storage unit is higher than a second temperature threshold, the voltage of the energy storage unit is lower than a first voltage threshold, and the voltage of a single cell in the energy storage unit is lower than a first cell voltage threshold. Exiting the mode when the voltage of a single cell in the energy storage unit is lower than the first cell voltage threshold can prevent damage to the cells due to excessively low cell voltage.

[0082] Optionally, the range of the third SOC threshold is 0%≤SOC≤10%, for example, it can be 0%, 2%, 3%, 5%, 10%.

[0083] Optionally, the range of the second temperature threshold is 0℃≤T≤20℃, for example, it can be 0℃, 5℃, 10℃, 15℃, 20℃.

[0084] The second temperature threshold is greater than or equal to the first temperature threshold. The third SOC threshold is less than or equal to the second SOC threshold. The third SOC threshold is less than or equal to the first SOC threshold.

[0085] In embodiments of this application, the energy supply device includes an electrical energy receiving unit for receiving electrical energy released by the energy storage unit to the energy supply device during discharge heating and / or charge-discharge heating.

[0086] Optionally, the current for discharge heating may include a constant current. For example, discharge heating includes a linear waveform as shown in Figure 1. This allows the energy storage unit to maintain a large current, resulting in rapid heating. It can be understood that heat generation is positively correlated with current. A constant current can maintain a large current, thereby providing a large amount of heat generation.

[0087] Optionally, the charging and discharging heating current is a pulsed current. This pulsed current can be a bipolar pulsed current where the absolute values ​​of the peak values ​​of the charging current and the discharging current are substantially equal, or it can be such as... Figure 3 The negative pulse current shown can also be as follows: Figure 4 The positive pulse current shown.

[0088] The technical solution of this application can be applied to scenarios where energy supply equipment needs to charge the energy storage unit of a power-consuming device. When the energy supply equipment needs to charge the energy storage unit of the power-consuming device, if the conditions for entering the heating mode are met, the heating mode is entered first. After the energy storage unit is heated, the charging mode is then entered. This allows the energy storage unit to be heated and raised in temperature first through discharge or charge-discharge in a low-temperature environment, so that the energy storage unit temperature rises before charging.

[0089] Optionally, the energy supply device can charge the energy storage unit of the electrical device via wired or wireless means.

[0090] In some possible implementations, the temperature-up rate can be increased by increasing the discharge current. For example, the discharge rate can be greater than or equal to 6C. This allows the energy storage unit to heat up quickly, completing preheating before charging in a short time.

[0091] For example, when the energy storage unit temperature is -20℃, and the energy storage unit can use a larger discharge rate, such as 10C discharge, the heating rate is greater than 5℃ / min.

[0092] In some possible implementations, in the case of discharge heating, the heating parameters meet at least one of the following.

[0093] The discharge current is greater than or equal to the first set current.

[0094] The discharge rate is greater than or equal to the first discharge rate threshold.

[0095] The duration of discharge heating is within the first duration range.

[0096] The relationship between the discharge duration t1 and the total charging duration t2 is: t2 = βt1, where β is between 1 and 10000.

[0097] The rate of temperature rise is greater than or equal to the first temperature rise threshold.

[0098] Optionally, the range of the first discharge rate threshold is 0 < I ≤ 10C, for example, the first discharge rate threshold can be 1C.

[0099] The first duration is within the range of 1 ≤ t ≤ 1.5 min.

[0100] Optionally, the range of the first temperature rise threshold is T≥5℃ / min.

[0101] Optionally, the discharge power can be in the range of 262≤U≤739kW.

[0102] Optionally, if conditions permit, the maximum permissible discharge rate can be used.

[0103] In some embodiments, the energy supply device includes an energy storage device, with an energy receiving unit connected to the energy storage device. The energy storage device is used to store at least a portion of the electrical energy released by the energy storage unit to the energy supply device during discharge heating and / or charge-discharge heating. The energy storage device can be any form of energy storage device.

[0104] In some embodiments, the power receiving unit is connected to the power grid, and in the case of discharge heating and / or charge-discharge heating, the power receiving unit transmits at least a portion of the electrical energy released by the energy storage unit to the energy supply equipment to the power grid.

[0105] Optionally, the energy storage unit can discharge only to the energy storage device, discharge only to the grid, or discharge to both the energy storage device and the grid.

[0106] After heating is complete, the device can enter the charging phase, which charges the energy storage unit of the electrical equipment.

[0107] Optionally, in heating mode, the amount of electricity discharged from the energy storage unit to the energy storage device can be recharged back to the energy storage unit.

[0108] For example, during the charging process, the energy storage unit can be charged simultaneously using both the power grid and the energy storage device. This results in a faster charging speed.

[0109] The energy supply equipment and electrical equipment for implementing the energy storage unit heating scheme of this application are described below.

[0110] Regarding the energy supply equipment, in some possible implementations, the power receiving unit includes an energy conversion device, which can be used to: convert the voltage output by the energy storage unit into a voltage matched to the energy storage device and / or convert the voltage output by the energy storage unit into a voltage matched to the power grid during discharge heating.

[0111] In charge-discharge heating: the voltage output from the energy storage unit is converted to a voltage that matches the energy storage device and / or the power grid; and the voltage output from the energy storage device and / or the power grid is converted to a voltage that matches the energy storage unit.

[0112] Optionally, the energy conversion device includes multiple DC-DC converters.

[0113] Optionally, the DC-DC converter is a bidirectional DC-DC converter. In the case of charge-discharge heating, the bidirectional DC-DC converter can be used for bidirectional voltage conversion between the energy storage unit and the energy storage device / grid.

[0114] Optionally, the energy conversion device can also be used to convert the voltage output by the grid or energy storage device into a voltage that matches the energy storage unit during the charging process.

[0115] Optionally, the DC-DC converter can adjust the ratio of input voltage to output voltage by adjusting the coil winding ratio.

[0116] In some possible implementations, the energy supply device also includes multiple sensors for acquiring at least the operating parameters of the energy storage unit during the heating process. These operating parameters may include, but are not limited to, ambient temperature, energy storage unit temperature, current, individual cell voltage of the energy storage unit, total voltage of the energy storage unit, state of charge (SOC) of the energy storage unit, temperature of the energy storage device of the energy supply device, and SOC of the energy storage device of the energy supply device. The multiple sensors include, but are not limited to, voltage detection devices, current detection devices, and temperature detection devices.

[0117] In some possible implementations, the energy supply device also includes a first control device connected to the energy conversion device and also connected to a sensor. The first control device is used to acquire operating parameters and control the heating process of the energy storage unit.

[0118] Optionally, the first control device is used to control the energy storage unit to discharge to the energy supply device after detecting that the charging connection between the electrical equipment and the energy supply device has been confirmed, provided that the conditions for entering the discharge heating are met.

[0119] Optionally, the first control device is used to control the energy storage unit and the energy supply device to alternately charge and discharge after detecting that the charging connection between the electrical equipment and the energy supply equipment has been confirmed, provided that the conditions for entering the charging and discharging heating phase are met.

[0120] Optionally, the first control device is used to control the exit from the heating mode to stop after detecting that the charging connection between the electrical device and the energy supply device has been confirmed, provided that the conditions for exiting the heating mode are met.

[0121] The charging connection confirmation process may include, but is not limited to, mutual identity verification and parameter exchange between the electrical device and the energy supply device.

[0122] like Figure 5 As shown, in some possible implementations, the energy supply equipment includes a host and a terminal, the energy storage unit is connected to the host through the terminal, and the power receiving unit is deployed on the host.

[0123] For example, the terminal can connect to the charging gun of the device, or the terminal can establish a wireless charging connection with the energy storage unit of the device.

[0124] The terminal can also be used to enable information exchange between electrical equipment and energy supply equipment.

[0125] The host also has at least one of the aforementioned energy storage device and the first control device.

[0126] In one possible implementation, the energy storage device has a storage capacity greater than that of the energy storage unit. This ensures that it can receive the discharge electricity from the electrical devices. For example, if the energy storage device has a storage capacity much larger than that of the energy storage unit, it can receive the discharge electricity from multiple electrical devices when multiple devices are heating.

[0127] Optionally, the energy supply equipment may include multiple energy storage devices.

[0128] Optionally, the energy supply device can be connected to the energy storage units of multiple electrical devices, and can store the electrical energy released by multiple energy storage units to the energy supply device when multiple energy storage units are in discharge heating and / or charge-discharge heating.

[0129] For example, energy supply equipment includes multiple energy storage devices and parallel energy storage combiner devices. This can enhance energy storage capacity.

[0130] Optionally, the energy storage capacity of all energy storage devices in the energy supply equipment is greater than that of the energy storage unit in the power consumption equipment.

[0131] In one specific implementation, the energy supply equipment includes multiple energy storage devices, parallel energy storage combiner devices, a main unit, and a terminal. The energy storage devices have temperature sensors and a Business Unit Management System (BMS). The main unit includes an energy conversion device and a primary control device. The terminal serves as a hub for information and electrical energy interaction between the energy supply equipment and the electrical equipment, enabling information and electrical energy exchange between them. The electrical equipment includes an energy storage unit, a BMS, and voltage, current, and temperature detection devices.

[0132] Regarding the electrical equipment, the electrical equipment also includes a second control device, which is used to control the exit from the heating mode under the conditions that meet the exit from the heating mode.

[0133] In heating mode, the control devices of both the electrical equipment and the energy supply equipment detect the exit conditions for heating mode. Once either the control device of the electrical equipment or the energy supply equipment detects that the exit conditions for heating mode are met, it controls the exit from heating mode. For example, when the voltage of a single cell in the energy storage unit is low, the SOC of the energy storage unit is low, or the temperature of the energy storage unit is too high, the heating mode can be exited in time to protect the equipment.

[0134] The second control device is also used to control the energy storage unit to discharge to the energy supply device after detecting that the electrical equipment and the terminal have completed the charging connection confirmation, and if the conditions for entering the discharge heating are met.

[0135] The second control device is also used to, after detecting that the charging connection between the electrical equipment and the energy supply equipment has been confirmed, control the energy storage unit and the energy supply equipment to alternately charge and discharge when the conditions for entering the charging and discharging heating are met.

[0136] Both the first and second control devices are configured with conditions for entering and exiting the heating mode.

[0137] Optionally, when either the first control device or the second control device detects that the exit condition is met, the control device exits the heating mode.

[0138] Optionally, when either the first control device or the second control device detects that the entry conditions for the heating mode are met, the two devices enter the heating mode after exchanging signals.

[0139] The specific heating implementation methods of discharge heating and charge-discharge heating in the technical solution of this application are described below.

[0140] Regarding discharge heating, in some possible implementations, discharge heating includes at least one of constant current discharge and constant voltage discharge. Discharge heating may include only constant current discharge, only constant voltage discharge, or both constant current discharge and constant voltage discharge.

[0141] In some possible implementations, during the discharge heating process, it is possible to select constant current discharge only, constant voltage discharge only, or both constant current discharge and constant voltage discharge. The selection is based on factors including the individual cell voltage of the energy storage unit and the voltage of the energy storage unit.

[0142] In an optional embodiment, during the discharge heating process, a constant current discharge is first performed. When the voltage of a single cell in the energy storage unit approaches or reaches a first cell voltage threshold, the current is reduced to maintain the voltage of the single cell at or above the first cell voltage threshold. The first cell voltage threshold is determined based on the cell's cutoff voltage. Optionally, the first cell voltage threshold is greater than or equal to the cell's cutoff voltage. The temperature rise rate of the energy storage unit during the constant current discharge process is greater than the temperature rise rate during the discharge process after the current is reduced. This helps avoid shortening the lifespan of the energy storage unit.

[0143] For example, such as Figure 1A and Figure 1B As shown, when the voltage of a single cell in the energy storage unit is high, and the state of charge (SOC) of the energy storage unit meets the conditions for entering discharge heating, constant current discharge can be performed first. As the discharge proceeds, the voltage of a single cell in the energy storage unit will gradually decrease. If the voltage of a single cell decreases to near the cutoff voltage, and the temperature of the energy storage unit has not yet risen to meet the conditions for exiting the heating mode, the current can be reduced to maintain the cell voltage above the cutoff voltage. After reducing the current, the temperature rise rate of the energy storage unit decreases.

[0144] like Figure 1C and 1D As shown, when the voltage of a single cell in the energy storage unit is high, and the state of charge (SOC) of the energy storage unit meets the conditions for entering discharge heating, constant current discharge can be performed first. As the discharge proceeds, the voltage of a single cell in the energy storage unit will gradually decrease. If the voltage of a single cell decreases to near the cutoff voltage, and the temperature of the energy storage unit has not yet risen to meet the conditions for exiting the heating mode, constant voltage discharge can be switched to maintain the cell voltage above the cutoff voltage. The temperature rise rate of the energy storage unit during constant current discharge is greater than that during constant voltage discharge.

[0145] If the temperature of the energy storage unit rapidly rises to meet the conditions for exiting the heating mode during the constant current discharge phase, and the voltage of the energy storage unit remains above the cutoff voltage at this time, then the entire discharge heating process only includes constant current discharge. If the voltage of a single cell in the energy storage unit is low at the beginning of the discharge heating mode, constant voltage discharge can be performed directly.

[0146] In an optional embodiment, during the discharge heating process, constant current discharge is first performed. When the voltage of the energy storage unit approaches or reaches the minimum voltage threshold of the energy storage unit, the current is reduced or the discharge is switched to constant voltage discharge so that the voltage of the energy storage unit is maintained above the minimum voltage threshold.

[0147] Regarding charge-discharge heating, in some possible implementations, charge-discharge heating may include at least one of positive pulse heating, negative pulse heating, and bipolar pulse heating. During positive pulse heating, the SOC of the energy storage unit tends to increase; during negative pulse heating, the SOC of the energy storage unit tends to decrease; during bipolar pulse heating, the SOC of the energy storage unit remains essentially unchanged.

[0148] Positive pulse heating refers to the situation where the charging current from the energy supply device to the energy storage unit is greater than the discharging current from the energy storage unit to the energy supply device. Negative pulse heating refers to the situation where the charging current from the energy supply device to the energy storage unit is less than the discharging current from the energy storage unit to the energy supply device. Bipolar pulse heating refers to the situation where the charging current from the energy supply device to the energy storage unit is approximately equal to the discharging current from the energy storage unit to the energy supply device.

[0149] During the charging and discharging heating process, one or more of the following methods can be selected: positive pulse heating, negative pulse heating, and bipolar pulse heating. The selection criteria include one or more of the following: the temperature of the energy storage unit, the state of charge (SOC) of the energy storage unit, the temperature of the energy storage device of the energy supply equipment, and the SOC of the energy storage device of the energy supply equipment. This allows for the selection of a suitable pulse heating method based on the operating parameters.

[0150] In some possible implementations, the conditions for entering negative pulse heating during the charge-discharge heating process include: the State of Charge (SOC) of the energy storage unit is greater than the fourth SOC threshold. During negative pulse heating, the discharge current from the energy storage unit to the energy supply device is greater than the charging current from the energy supply device to the energy storage unit. This results in higher heating efficiency during discharge and a faster temperature rise rate for the energy storage unit. For example, when the temperature of the energy storage unit is low, negative pulse heating is used. The energy storage unit switches between the discharge and charging processes, and the discharge current is greater than the charging current. This allows for rapid temperature rise through high-current discharge and replenishment of the SOC during charging, preventing excessive reduction in SOC and individual cell voltage.

[0151] In some possible implementations, the conditions for entering positive pulse heating during the charge-discharge heating process include one or more of the following: the SOC of the energy storage unit is less than the fourth SOC threshold, the SOC of the energy storage device of the energy supply equipment is greater than the upper limit threshold of energy storage, and the temperature of the energy storage device of the energy supply equipment is lower than the third temperature threshold.

[0152] In one specific embodiment, the energy storage unit has a low temperature and cannot be directly charged, and the SOC of the energy storage unit is also relatively low, so positive pulse heating can be used for heating.

[0153] In this way, even when the energy storage unit's SOC and temperature are low, the energy storage unit can be heated and its temperature increased by switching between charging and discharging processes, with charging exceeding discharging.

[0154] In another specific embodiment, the temperature of the energy storage unit is low and it cannot be directly charged, but the SOC of the energy storage device of the energy supply device is large and it cannot receive the discharge of the energy storage unit. Positive pulse discharge can be used to appropriately reduce the SOC of the energy storage device of the energy supply device, so that the SOC of the energy storage unit increases and the energy storage unit is heated up at the same time.

[0155] In another specific embodiment, the temperature of the energy storage device of the energy supply device is also relatively low, so positive pulse charging and discharging can be used to make the discharge current of the energy storage device greater than the charging current of the energy storage device, thereby heating up the energy storage device.

[0156] When the conditions for entering negative pulse heating or positive pulse heating are met, the conditions for entering bipolar pulse heating are also met.

[0157] This application also provides an embodiment where the heating type can be selected, and the heating mode can be one or more of discharge heating and charge-discharge heating. This allows for the selection of a suitable heating type to improve the temperature rise efficiency of the energy storage unit.

[0158] In one possible implementation, the selection criteria for the heating type may include, but are not limited to, one or more of the following: the SOC of the energy storage unit, the temperature of the energy storage unit, the ambient temperature, the voltage of the energy storage unit, the voltage of a single cell of the energy storage unit, and the temperature of the energy storage device of the energy supply equipment. Optionally, the selection criteria may be the aforementioned entry and exit conditions for discharge heating. For example, discharge heating may be used when the entry conditions for discharge heating are met; if the SOC of the energy storage unit does not meet the entry conditions for discharge heating, but the temperature of the energy storage unit or the ambient temperature meets the entry conditions for discharge heating, charge-discharge heating may be used.

[0159] Optionally, for example, if the initial SOC of the energy storage unit is high and the ambient temperature is low, meeting the entry conditions for discharge heating, then discharge heating can be used. After discharge heating for a period of time, if the SOC decreases to meet the exit conditions for discharge heating, and the SOC of the energy storage unit does not support continued discharge heating, but the temperature of the energy storage unit still needs to be heated further, then discharge heating can be exited, and charge-discharge heating can begin. Alternatively, if the initial SOC of the energy storage unit is low and the temperature of the energy storage unit is low, charge-discharge heating can be performed first. For example, after heating with positive pulse charge-discharge for a period of time, if the SOC of the energy storage unit increases and the temperature of the energy storage unit is low, meeting the entry conditions for discharge heating, then charge-discharge heating can be exited, and discharge heating can begin.

[0160] Optionally, the heating scheme of the heating mode may be at least one of the following.

[0161] Option 1: As shown in Figure 1, only discharge heating is performed.

[0162] Option 2: As Figure 6 As shown, discharge heating is performed first, followed by charge-discharge heating.

[0163] Option 3: such as Figure 7 As shown, charging and discharging heating is performed first, followed by discharging heating.

[0164] Option 4: Figure 2-4 As shown, only charging and discharging heating is performed.

[0165] It is understood that Option 1 uses only discharge heating, Options 2 and 3 use both discharge heating and charge-discharge heating, and Option 4 uses only charge-discharge heating.

[0166] The charging and discharging heating in schemes 2-4 above can include one or more of positive pulse heating, negative pulse heating, and bipolar pulse heating. The charging and discharging heating process in schemes 2-4 above can include only one of negative pulse heating and bipolar pulse heating, or it can include multiple types of negative pulse heating and bipolar pulse heating.

[0167] This application also provides an embodiment in which a heating scheme can be selected. The heating scheme of the heating mode can be selected from any one of the schemes 1-4 above.

[0168] This allows you to choose the appropriate heating solution based on the actual situation.

[0169] Option 4 includes: Option 4-1 negative pulse heating (such as...) Figure 3 As shown); Scheme 4 also includes Scheme 4-2 positive pulse heating (such as... Figure 2 As shown); Scheme 4-3: Bipolar pulse heating (such as...) Figure 4 (As shown).

[0170] In the specific implementation, the heating mode of the energy storage unit can be any one of Scheme 1, Scheme 2, Scheme 3, Scheme 4-1, Scheme 4-2, and Scheme 4-3. When the heating mode of the energy storage unit is selectable, the available heating schemes can be any two, three, four, five, or six of Scheme 1, Scheme 2, Scheme 3, Scheme 4-1, Scheme 4-2, and Scheme 4-3.

[0171] In one possible implementation, the heating mode is selected based on one or more of the following: the SOC of the energy storage unit, the temperature of the energy storage unit, and the ambient temperature of the electrical equipment.

[0172] In an optional embodiment, the entry conditions for Scheme 1 include one or more of the following: the temperature of the energy storage unit is less than a first temperature threshold, and the SOC of the energy storage unit is greater than or equal to a first SOC threshold.

[0173] In an optional embodiment, the entry conditions for scheme 2 include one or more of the following: the temperature of the energy storage unit is less than a first temperature threshold, and the SOC of the energy storage unit is greater than a second SOC threshold.

[0174] In an optional embodiment, the entry conditions for scheme 3 include: the temperature of the energy storage unit is less than a first temperature threshold, and the SOC of the energy storage unit is less than a second SOC threshold.

[0175] In an optional embodiment, the entry condition for scheme 4 includes: the temperature of the energy storage unit is less than a first temperature threshold.

[0176] Optionally, the entry conditions for scheme 4-1 include: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is greater than the fourth SOC threshold.

[0177] Optionally, the entry conditions for scheme 4-2 include: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is less than or equal to the fourth SOC threshold.

[0178] Optionally, the entry condition for scheme 4-3 includes: the temperature of the energy storage unit is less than a first temperature threshold.

[0179] The following describes a specific implementation method for heating an energy storage unit using discharge heating.

[0180] After the terminal and the power-consuming device are connected via a charging gun, both the power-consuming device and the energy supply device detect the charging gun signal. Both devices then complete self-tests to confirm the charging connection. The first and second control devices are configured with conditions to determine whether to initiate discharge heating. For example, the first and second control devices may set a first temperature threshold, a first SOC threshold, a third SOC threshold, a first cell voltage threshold, and a first rated load current. The first temperature threshold can be configured to 10°C, the first SOC threshold to 30%, the third SOC threshold to 1%, and the first cell voltage threshold to 1V.

[0181] When the first control device or the second control device reads that the temperature of the energy storage unit is lower than the first temperature threshold, for example, when the temperature of the energy storage unit is -20℃, and the SOC of the energy storage unit is greater than or equal to the first SOC threshold, for example, when the SOC of the energy storage unit is 35%, the first control device or the second control device controls the discharge heating to start. The energy storage unit starts to discharge to the energy supply device and starts the discharge heating. The current (0 < I ≤ 10C) is controlled by the energy conversion device, and its magnitude depends on the current cell's predetermined capacity (SOC, voltage) and the current ambient temperature, as well as the first cell voltage threshold.

[0182] During the discharge heating state, the temperature of the energy storage unit rises. When the first control device or the second control device reads that the temperature of the energy storage unit is greater than the first temperature threshold, for example, when the temperature of the energy storage unit is 15°C, or when the SOC of the energy storage unit is less than or equal to the third SOC threshold, for example, when the SOC of the energy storage unit is 1%, or when the voltage of any single cell of the energy storage unit is less than or equal to the first cell voltage threshold, the first control device or the second control device controls the capacity conversion device to stop working, exits the discharge heating, and the discharge heating is completed.

[0183] Specific embodiments of each heating scheme are provided below in conjunction with various scenarios. It should be understood that the heating schemes of this application are not limited to the specific embodiments described below.

[0184] After the terminal and the power-consuming equipment are connected via the charging gun, both the power-consuming equipment and the energy supply equipment detect the charging gun signal. Both the power-consuming equipment and the energy supply equipment complete self-tests and confirm the charging connection. The first and second control devices are set with entry and exit conditions for the heating mode. When either the first or second control device detects that the exit condition is met, it controls the exit from the heating mode.

[0185] In one possible implementation, when the temperature of the current energy storage unit is below a first temperature threshold, and when the State of Charge (SOC) is greater than or equal to the first SOC threshold, the above-mentioned scheme 1 is activated: discharge heating only; at this time, the discharge current is greater than the first load rated current of the energy storage unit. The current is controlled by the energy conversion device inside the host, and its magnitude depends on the given capacity of the current cell, the current ambient temperature, and the first cell voltage threshold. For example, constant current heating can be performed first. If the voltage of any single cell drops to near the first cell voltage threshold, the heat dissipation current can be reduced, or it can be switched to constant voltage current to keep the voltage of the single cell above the first cell voltage threshold.

[0186] When in discharge heating mode, the energy storage unit temperature rises until it is not lower than the second temperature threshold. If the voltage of any single cell drops to the first cell voltage threshold, the system will take active protection measures and stop discharge heating.

[0187] In one possible implementation, when the temperature of the current energy storage unit is below a first temperature threshold and the SOC of the energy storage unit is above a second SOC threshold, Scheme 2 is activated: first discharge heating followed by charge-discharge heating. The discharge current is numerically greater than the first rated load current, rapidly heating the unit through the discharge current. When the SOC of the energy storage unit falls below a fifth SOC threshold, charge-discharge heating is used to replenish the energy storage unit until its temperature is not lower than the second temperature threshold. The charge-discharge heating in Scheme 2 can be either positive pulse heating or negative pulse heating, depending on the SOC of the energy storage unit. For example, negative pulse heating can be used when the SOC is high, and positive pulse heating can be used when the SOC is low.

[0188] In one possible implementation, when the temperature of the energy storage unit is below a first temperature threshold and the state of charge (SOC) of the energy storage unit is above a fourth SOC, negative pulse heating, as described in Scheme 4-1, is employed. The SOC of the energy storage unit gradually decreases, and the temperature of the energy storage unit gradually increases until the temperature of the energy storage unit is not lower than a second temperature threshold.

[0189] In one possible implementation, when the temperature of the energy storage unit is less than the first temperature threshold and the SOC of the energy storage unit is less than the fourth SOC, positive pulse heating is used in Scheme 4-2, and the SOC of the energy storage unit gradually increases, and the temperature of the energy storage unit gradually increases.

[0190] In one possible implementation, when the temperature of the energy storage unit is below a first temperature threshold, heating can be used as described in scheme 4-3. This allows the energy storage unit's charge to remain constant while simultaneously raising its temperature.

[0191] Optionally, the heating scheme can be selected. The available optional heating schemes may include any one or more of the above-mentioned heating schemes.

[0192] Optionally, if both Scheme 1 and Scheme 2 are optional heating schemes, the first SOC threshold is greater than the second SOC threshold. The second SOC threshold is greater than the fifth SOC threshold.

[0193] Optionally, if Scheme 2 and Scheme 4-1 or Scheme 4-1 are optional heating schemes, the fifth SOC threshold is greater than the fourth SOC threshold.

[0194] Optionally, the first SOC threshold can be 30%, the second SOC threshold can be 20%, the fourth SOC threshold can be 2%, and the fifth SOC threshold can be 10%.

[0195] In some possible implementations, the technical solution of this application also includes an overheat protection mechanism. When the temperature of either the energy storage unit of the electrical equipment or the energy storage device of the energy supply equipment exceeds the high-temperature protection temperature, the heating mode or charging mode is exited. The high-temperature protection temperature can be, for example, 65°C. This provides high-temperature protection, protecting the energy storage unit and the energy storage device of the energy supply equipment.

[0196] In some possible implementations, when the temperature of the energy storage device in the energy supply equipment falls below the cryogenic protection temperature, charging and discharging heating is initiated. This heats the energy storage device. For example, positive pulse heating can be used, where the discharge current from the energy storage device to the energy storage unit is greater than the discharge current from the energy storage unit to the energy storage device, allowing for faster heating of the energy storage device.

Claims

1. An energy supply device, characterized in that, The energy supply device is used to charge the energy storage unit of the electrical equipment. The energy storage unit has a heating mode, and the heating type of the heating mode includes at least one of discharge heating and charge-discharge heating. During the discharge heating process, the energy storage unit discharges to the energy supply device, and during the charge-discharge heating process, the energy storage unit and the energy supply device alternately charge and discharge. The energy supply device includes an energy receiving unit, which is at least used to receive the electrical energy released by the energy storage unit to the energy supply device in the case of discharge heating and / or charge-discharge heating.

2. The energy supply device according to claim 1, characterized in that, The heating type of the heating mode can be selected from one or more of the discharge heating and the charge-discharge heating.

3. The energy supply device according to claim 2, characterized in that, The selection of the heating type is based on one or more of the following: the SOC threshold of the energy storage unit, the temperature of the energy storage unit, the ambient temperature, the voltage of the energy storage unit, the voltage of a single cell of the energy storage unit, and the temperature of the energy storage device of the energy supply equipment.

4. The method according to any one of claims 1-3, characterized in that, The conditions for entering the discharge heating include one or more of the following: the SOC of the energy storage unit is higher than a first SOC threshold, the temperature of the energy storage unit is lower than a first temperature threshold, the voltage of the energy storage unit is higher than a first voltage threshold, and the voltage of a single cell of the energy storage unit is greater than or equal to a first cell voltage threshold; and / or The conditions for entering the charge / discharge heating state include one or more of the following: the SOC of the energy storage unit is higher than a second SOC threshold, the temperature of the energy storage unit is lower than a first temperature threshold, the voltage of the energy storage unit is greater than or equal to the first cell voltage threshold, and the temperature of the energy storage device of the energy supply equipment is lower than a third temperature threshold; and / or The conditions for exiting the heating mode include one or more of the following: the SOC of the energy storage unit is lower than the third SOC threshold, the temperature of the energy storage unit is higher than the second temperature threshold, the voltage of the energy storage unit is lower than the first voltage threshold, and the voltage of any single cell of the energy storage unit is lower than the first cell voltage threshold.

5. The energy supply device according to any one of claims 1-3, characterized in that, The discharge heating includes at least one of constant current discharge and constant voltage discharge; and / or The charge-discharge heating includes at least one of positive pulse heating, negative pulse heating, and bipolar pulse heating. During the positive pulse heating process, the SOC of the energy storage unit shows an upward trend; during the negative pulse heating process, the SOC of the energy storage unit shows a downward trend; and during the bipolar pulse heating process, the SOC of the energy storage unit remains basically unchanged.

6. The energy supply device according to claim 5, characterized in that, During the discharge heating process, constant current discharge and / or constant voltage discharge can be selected; the selection is based on at least one of the following: the voltage of a single cell in the energy storage unit, the voltage of the energy storage unit; and / or During the charging and discharging heating process, one or more of positive pulse heating, negative pulse heating, and bipolar pulse heating can be selected for charging and discharging heating. The selection is based on at least one of the following: the SOC of the energy storage unit, the temperature of the energy storage device of the energy supply equipment, and the SOC of the energy storage device of the energy supply equipment.

7. The energy supply device according to claim 6, characterized in that, During the discharge heating process, constant current discharge is first performed. When the voltage of a single cell in the energy storage unit approaches or reaches a first cell voltage threshold, the current is reduced to maintain the voltage of a single cell in the energy storage unit at or above the first cell voltage threshold; and / or During the charging and discharging heating process, the conditions for entering the negative pulse heating include one or more of the following: the SOC of the energy storage unit is greater than the fourth SOC threshold. and / or During the charging and discharging heating process, the conditions for entering the positive pulse heating include one or more of the following: the SOC of the energy storage unit is less than the fourth SOC threshold, the SOC of the energy storage device of the energy supply equipment is greater than the upper limit threshold of energy storage, and the temperature of the energy storage device of the energy supply equipment is lower than the third temperature threshold.

8. The energy supply device according to any one of claims 1-3, characterized in that, The heating scheme of the heating mode may be at least one of the following: Option 1: Perform only the aforementioned discharge heating; Option 2: Perform the discharge heating first, then perform the charge-discharge heating; Option 3: Perform the charge-discharge heating first, then perform the discharge heating; Option 4: Perform only the charge-discharge heating.

9. The energy supply device according to claim 8, characterized in that, The heating mode scheme is selectable; The heating mode can be selected from one or more of Scheme 1, Scheme 2, Scheme 3, and Scheme 4.

10. The energy supply device according to claim 8 or 9, characterized in that, The selection of the heating scheme is based on one or more of the following: The SOC threshold of the energy storage unit, the temperature of the energy storage unit, the ambient temperature, the temperature of the energy storage device of the energy supply equipment, and the SOC of the energy storage device of the energy supply equipment.

11. The energy supply device according to claim 10, characterized in that, The entry conditions for Scheme 1 include one or more of the following: the temperature of the energy storage unit is less than a first temperature threshold, and the SOC of the energy storage unit is greater than or equal to the first SOC threshold. The entry conditions for Scheme 2 include one or more of the following: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is greater than the second SOC threshold. The entry conditions for Scheme 3 include: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is lower than the second SOC threshold. The entry condition for scheme 4 includes that the temperature of the energy storage unit is less than the first temperature threshold.

12. The method according to any one of claims 8-11, characterized in that, Scheme 4 includes: Option 4-1: Negative pulse heating; and / or Option 4-2: Positive pulse heating; and / or Option 4-3: Bipolar pulse heating.

13. The method according to claim 12, characterized in that, The entry conditions for Scheme 4-1 include: the temperature of the energy storage unit is less than the first temperature threshold, and the SOC of the energy storage unit is greater than the fourth SOC threshold; and / or The entry conditions for scheme 4-2 include: the temperature of the energy storage unit is less than the first temperature threshold, the SOC of the energy storage unit is less than or equal to the fourth SOC threshold; and / or; The conditions for entering scheme 4-3 include: the temperature of the energy storage unit is less than the first temperature threshold.

14. The energy supply device according to any one of claims 1-13, characterized in that, The energy supply device includes an energy storage device, and the power receiving unit is connected to the energy storage device. The energy storage device is used to store at least a portion of the electrical energy released by the energy storage unit to the energy supply device in the case of discharge heating and / or charge-discharge heating. and / or The power receiving unit is connected to the power grid. In the case of discharge heating and / or charge-discharge heating, the power receiving unit transmits at least a portion of the electrical energy released by the energy storage unit to the energy supply device to the power grid.

15. The energy supply device according to claim 14, characterized in that, The power receiving unit includes an energy conversion device, which is used for: In discharge heating: the voltage output by the energy storage unit is converted into a voltage matched to the energy storage device and / or a voltage matched to the power grid; and / or In charge-discharge heating: the voltage output by the energy storage unit is converted into a voltage that matches the energy storage device and / or the power grid; and the voltage output by the energy storage device and / or the power grid is converted into a voltage that matches the energy storage unit.

16. The energy supply device according to claim 15, characterized in that, The energy conversion device includes multiple DC-DC converters.

17. The energy supply device according to claim 15 or 16, characterized in that, The energy supply equipment further includes a first control device, which is connected to the energy conversion device. The first control device is used to acquire the operating parameters of the energy storage unit and control the discharge heating process.

18. The energy supply device according to claim 17, characterized in that, The operating parameters of the energy storage unit include at least one of the following: ambient temperature, temperature of the energy storage unit, current, voltage of a single cell of the energy storage unit, total voltage of the energy storage unit, state of charge (SOC) of the energy storage unit, temperature of the energy storage device of the energy supply equipment, and SOC of the energy storage device of the energy supply equipment.

19. The energy supply device according to claim 17 or 18, characterized in that, The first control device is further configured to: after detecting that the electrical device and the energy supply device have completed the charging connection confirmation, and if the conditions for entering the discharge heating are met, control the energy storage unit to discharge to the energy supply device; if the conditions for entering the charge-discharge heating are met, control the energy storage unit and the energy supply device to alternately charge and discharge; and / or if the conditions for exiting the heating mode are met, control to stop exiting the heating mode.

20. The energy supply device according to any one of claims 14-19, characterized in that, The energy storage device has a greater energy storage capacity than the energy storage unit.

21. The energy supply device according to any one of claims 14-20, characterized in that, The energy supply equipment includes a plurality of the energy storage devices; and / or The energy supply device can be connected to the energy storage units of multiple electrical devices, and can store the electrical energy released by the multiple energy storage units to the energy supply device when the multiple energy storage units are all in the state of discharge heating and / or charge-discharge heating.

22. The energy supply device according to any one of claims 14-21, characterized in that, The energy supply equipment also includes a host and a terminal. The energy storage unit is connected to the host through the terminal, and the power receiving unit is deployed on the terminal. At least one of the energy storage device and the first control device of the energy supply equipment is deployed on the host; and / or The terminal is connected to the electrical device via the charging gun of the electrical device, and the charging gun is connected to the energy storage unit.

23. The energy supply device according to claim 22, characterized in that, The terminal is configured to enable information and energy interaction between the electrical equipment and the energy supply equipment.

24. An electrical appliance, characterized in that, The device includes an energy storage unit for providing energy to the electrical components of the electrical equipment. The energy storage unit has a heating mode, and the heating type of the heating mode includes at least one of discharge heating and charge-discharge heating. During the discharge heating process, the energy storage unit discharges to the energy supply device, and during the charge-discharge heating process, the energy storage unit and the energy supply device alternately charge and discharge.

25. The electrical equipment according to claim 24, characterized in that, The conditions for entering the discharge heating include one or more of the following: the SOC of the energy storage unit is higher than a first SOC threshold, the temperature of the energy storage unit is lower than a first temperature threshold, the voltage of the energy storage unit is higher than a first voltage threshold, and the voltage of a single cell of the energy storage unit is greater than or equal to a first cell voltage threshold; and / or The conditions for entering the charge-discharge heating include one or more of the following: the SOC of the energy storage unit is lower than the first SOC threshold, the SOC of the energy storage unit is higher than the second SOC threshold, the temperature of the energy storage unit is lower than the first temperature threshold, the voltage of the energy storage unit is greater than or equal to the first cell voltage threshold, and the first SOC threshold is greater than the second SOC threshold. and / or The conditions for exiting the heating mode include one or more of the following: the SOC of the energy storage unit is lower than the third SOC threshold, the temperature of the energy storage unit is higher than the second temperature threshold, the voltage of the energy storage unit is lower than the first voltage threshold, and the voltage of a single cell of the energy storage unit is lower than the first cell voltage threshold.

26. The electrical equipment according to claim 24 or 25, characterized in that, The electrical equipment further includes a second control device, which is used to control the exit of the heating mode when the conditions for exiting the heating mode are met.

27. The electrical equipment according to any one of claims 24-26, characterized in that, The electrical equipment is a vehicle; and / or The energy supply device is the energy supply device according to any one of claims 1-23.

28. An energy interaction system, characterized in that, It includes the energy supply device according to any one of claims 1-23 and the electrical equipment according to any one of claims 24-27.

29. The energy interaction system according to claim 28, characterized in that, When either the first control device of the energy supply equipment or the second control device of the electrical equipment detects that the exit conditions for exiting the heating mode are met, it controls the exit from the heating mode.

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