CN116767027A - Charging control method, power receiving device controller, and power supply device controller - Google Patents

Abstract

The invention discloses a charging control method of powered equipment, a powered equipment controller and a power supply equipment controller, wherein the powered equipment comprises a charging interface, a battery pack, a battery heating system and a heating switch, and the heating switch is used for connecting the battery heating system and the charging interface, and the method comprises the following steps: the charging interface is connected with power supply equipment; acquiring battery parameters of a battery pack, wherein the battery parameters comprise battery temperature; when the temperature of the battery is smaller than a first temperature threshold, the electric connection between the battery pack and the charging interface is disconnected, and the heating switch is controlled to be closed; and sending the first message to the power supply equipment so that the power supply equipment provides the heating voltage/current corresponding to the first message for the battery heating system to heat the battery pack. According to the charging control method, when the powered device is used for charging the gun at a low temperature, the battery pack is heated through the power supply device, so that the battery pack can be charged better later.

Description

Charging control method, power receiving device controller, and power supply device controller

Technical Field

The present invention relates to the field of charging technologies of powered devices, and in particular, to a charging control method, a powered device controller, and a power supply device controller.

Background

When a power receiving apparatus (e.g., a vehicle) is charged, the battery pack is not allowed to be charged at a low temperature or the allowable charging current is small, depending on the characteristics of the battery pack of the power receiving apparatus, resulting in a long low-temperature charging time. For this reason, in the related art, when the battery pack temperature is low, a battery self-heating method is adopted, or a battery heating device capable of self-supplying heating energy is provided at the power receiving device side. However, the self-heating mode may further reduce the battery power, which is very easy to reduce to the low power threshold value, and thus self-heating cannot be achieved; the battery heating device is provided with an energy supply module at the power receiving equipment end, occupies the space of the power receiving equipment and has larger energy consumption when working at low temperature.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a charging control method, a power receiving device controller, and a power supply device controller, so as to heat a battery pack by the power supply device when the power receiving device is charged by a gun at a low temperature, so as to better charge the battery pack later.

In a first aspect, the present invention proposes a charging control method applied to a powered device, where the powered device includes a charging interface, a battery pack, a battery heating system, and a heating switch, where the heating switch is configured to connect the battery heating system and the charging interface, and the method includes: the charging interface is used for connecting with power supply equipment; acquiring battery parameters of the battery pack, wherein the battery parameters comprise battery temperature; when the battery temperature is smaller than a first temperature threshold, the electric connection between the battery pack and the charging interface is disconnected, and the heating switch is controlled to be closed; and sending a first message to the power supply equipment so that the power supply equipment provides heating voltage/current corresponding to the first message for the battery heating system to heat the battery pack.

In a second aspect, the present invention proposes another charging control method applied to a power supply apparatus, where the power receiving apparatus includes a charging interface, a battery pack, a battery heating system, and a heating switch, where the heating switch is used to connect the battery heating system and the charging interface, and the method includes: after detecting that a power supply interface of a power supply device is connected with the charging interface, sending a sixth message to the power receiving device, so that the power receiving device disconnects the electrical connection between the battery pack and the charging interface and controls the heating switch to be closed when the battery temperature of the battery pack is smaller than a first temperature threshold; and when a first message sent by the powered device is received, providing a heating voltage/current corresponding to the first message for the battery heating system so as to heat the battery pack.

In a third aspect, the present invention proposes a powered device controller including a memory, a processor, and a computer program stored on the memory, characterized in that the computer program, when executed by the processor, implements the charging control method of the first aspect described above.

In a fourth aspect, the present invention proposes a power supply device controller comprising a memory, a processor and a computer program stored on the memory, characterized in that the computer program, when executed by the processor, implements the charge control method of the second aspect described above.

According to the charging control method, the power receiving device controller and the power supply device controller, when the charging interface of the power receiving device is connected with the power supply device, the battery temperature of the battery pack of the power receiving device is obtained, when the battery temperature is smaller than the first temperature threshold, the electric connection between the battery pack and the charging interface is disconnected, the heating switch is controlled to be closed, and further a first message is sent to the power supply device, so that the power supply device provides heating voltage/current corresponding to the first message for the battery heating system to heat the battery pack. Therefore, when the power receiving equipment is charged by inserting the gun at a low temperature, the power supply equipment can heat the battery pack so as to charge the battery pack better later.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic diagram of a charging system according to an embodiment of the present invention;

fig. 2 is a flowchart of a charging control method applied to a power receiving apparatus according to an embodiment of the present invention;

fig. 3 is a flowchart of a charging control method applied to a power receiving apparatus according to one embodiment of the present invention;

fig. 4 is a flowchart of a charging control method applied to a power receiving apparatus according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a charging system according to another embodiment of the invention;

fig. 6 (a) and 6 (b) are schematic flow diagrams of charging control according to an embodiment of the present invention;

fig. 7 is a flowchart of a charging control method applied to a power supply apparatus according to an embodiment of the present invention;

fig. 8 is a flowchart of a charging control method applied to a power supply apparatus according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

A charging control method, a power receiving apparatus controller, and a power supply apparatus controller according to embodiments of the present invention are described below with reference to fig. 1 to 8.

It should be noted that the powered device may include, but is not limited to, vehicles including a power battery pack, aircraft, and ships, and may also be an energy storage device including an energy storage battery pack, or other powered devices having a charging requirement, and the following description will mainly take a vehicle including a battery pack as an example.

In addition, the power supply device includes, but is not limited to, a charging post, an energy storage device, or a vehicle having a reverse charging function, and is mainly described below as an example of the charging post.

In the embodiment of the present invention, as shown in fig. 1, the power receiving apparatus 100 includes a charging interface 110, a battery pack 120, a battery heating system 130, and a heating switch K7, the heating switch K7 being configured to connect the battery heating system 130 and the charging interface 110.

The invention provides a charging control method applied to powered equipment.

Fig. 2 is a flowchart of a charging control method applied to a powered device according to an embodiment of the present invention.

As shown in fig. 2, the charge control method applied to the power receiving apparatus includes:

s21, connecting with a power supply device by using a charging interface.

Specifically, the charging interface is connected with the power supply device, and the charging interface may be connected with a charging gun of the power supply device.

After the charging interface is connected with the power supply equipment, the power receiving equipment and the power supply equipment can carry out message interaction through the communication interface, and the power receiving equipment can determine that the power receiving equipment is connected with the power supply equipment through the charging interface through the related messages;

after the charging interface is connected to the power supply apparatus, the power receiving apparatus may also determine that the power supply apparatus has been connected to the charging interface by detecting the voltage level at the detection point of the charging interface-related circuit.

S22, acquiring battery parameters of the battery pack, wherein the battery parameters comprise battery temperature.

Specifically, the powered device may obtain a battery parameter of the battery pack, such as a battery temperature, to determine whether the battery pack needs to be heated prior to charging. For example, the battery temperature may be an average of temperatures at multiple locations of the battery pack.

And S23, when the battery temperature is smaller than a first temperature threshold value, the electric connection between the battery pack and the charging interface is disconnected, and the heating switch is controlled to be closed.

Specifically, the battery temperature is less than the first temperature threshold, which indicates that the battery temperature is low, the battery pack is not allowed to be charged, or the allowable current is small, the charging time is long, and the charging efficiency is low, so that the battery pack needs to be heated. At this time, the electrical connection between the battery pack and the charging interface, i.e., the battery charging circuit, may be disconnected, and the heating switch may be controlled to be closed, i.e., the battery heating circuit may be closed.

Wherein, a main switch (not shown in fig. 1 and 5) may be connected between the battery pack and the charging interface, and the disconnection of the electrical connection between the battery pack and the charging interface may be to control the main switch to be disconnected. The main switch can be a contactor, can be integrated with the battery pack, and can also be arranged outside the battery pack.

In one embodiment of the present invention, after detecting that the battery temperature is less than the first temperature threshold, the method may further comprise, before disconnecting the electrical connection between the battery pack and the charging interface and controlling the heating switch to close: transmitting a fourth message to the power supply apparatus to cause the power supply apparatus to determine whether to allow the power receiving apparatus to enter a power supply mode; and when a fifth message sent by the power supply equipment is received, controlling the power receiving equipment to enter a power supply mode. The power supply mode may be a mode in which the battery pack needs to be heated before charging, and in this mode, the power supply device supplies power to the battery heating system, so that the battery heating system works to heat the battery pack.

And S24, sending a first message to the power supply equipment so that the power supply equipment provides heating voltage/current corresponding to the first message for the battery heating system to heat the battery pack.

The first message may be a power receiving device demand message, and may include whether the power receiving device is to enter a power supply mode, and a value of a heating demand voltage and/or a heating demand current, so that the power supply device may provide a heating voltage/current corresponding to the first message to the battery heating system after receiving the first message, so as to heat the battery pack.

In an embodiment of the invention, the powered device demand voltage/current may be adjusted in real time based on the current temperature of the battery.

Specifically, as an example, before the first message is sent to the power supply device, the charging control method may further include: and generating a first message according to the battery temperature, wherein the heating voltage/current is inversely related to the battery temperature.

In this example, the battery pack has a lower battery temperature at the initial charge and a greater demand voltage/current may be sent to the power supply device so that the power supply device may provide a greater heating power for battery pack heating; when heating to a certain time, as the temperature of the battery pack gradually increases, in order to bring the battery pack temperature to an optimal temperature, the power receiving apparatus may gradually decrease the required voltage/current to prevent the temperature from exceeding the optimal temperature due to an excessive heating power.

As another example, before the first message is sent to the power supply device, the charging control method further includes: obtaining a temperature range according to the battery temperature, wherein the temperature range is a difference value between a maximum battery temperature and a minimum battery temperature; and generating a first message according to the temperature range, wherein the heating voltage/current is inversely related to the temperature range.

In this example, the heat generated by the battery is not uniformly distributed on the battery pack, and the heat dissipation capacity of each part of the battery pack is different, so that the temperature difference between the highest temperature and the lowest temperature of the battery in the heating process is larger and larger, and the required voltage/current can be reduced, so that the temperature of the battery can be more balanced.

The control method applied to the powered device can output electric energy to the battery heating system through the power supply device when the powered device is charged at low temperature, and the battery heating system heats the battery pack so that the powered device can be charged through higher charging current later.

In one embodiment of the present invention, as shown in fig. 3, the charge control method may further include:

and S25, when the temperature of the battery is detected to be increased to a second temperature threshold, sending a second message to the power supply equipment, so that the power supply equipment stops providing heating voltage/current for the battery heating system, and controlling the heating switch to be turned off, wherein the second temperature threshold is larger than the first temperature threshold.

Specifically, when the battery temperature increases to the second temperature threshold, it is indicated that the battery pack can be charged with a higher charging current at this time, and the heating of the battery pack can be stopped. The powered device may send a second message (e.g., a power mode exit message) to the power sourcing device to cause the power sourcing device to stop providing the heating voltage/current to the battery heating system and to control the heating switch to open.

In one embodiment of the present invention, as shown in fig. 4, the charge control method may further include:

and S26, when the temperature of the battery is detected to be increased to a second temperature threshold value, establishing electrical connection between the battery pack and the charging interface, and sending a third message to the power supply equipment so that the power supply equipment provides charging voltage/current for the battery pack, wherein the second temperature threshold value is larger than the first temperature threshold value.

Specifically, when the battery temperature increases to the second temperature threshold, it is indicated that the battery pack can be charged with a higher charging current at this time, and the heating of the battery pack can be stopped, and the power receiving apparatus can control the heating switch to be turned off. Meanwhile, a third message can be sent to the power supply equipment, namely the power supply equipment is informed, and the power supply equipment can charge normally at the moment, so that the power supply equipment provides charging voltage/current for the battery pack. The third message may also be a vehicle demand message, which may include whether the vehicle is going to enter a charging mode, and a charging demand voltage and/or a charging demand current, so that the charging pile may provide the power battery with a charging voltage/current corresponding to the third message after receiving the third message, so as to charge the power battery.

In one embodiment of the present invention, as shown in fig. 5, charging switches K5 and K6 are further connected between the charging interface 110 and the battery pack 120 and the heating switch K7. When the heating switch K7 is controlled to be closed, the charging switches K5 and K6 are also controlled to be closed; when the heating switch K7 is controlled to be turned off, the charging switches K5 and K6 are also controlled to be turned off. Wherein, the heating switch K7 and the charging switches K5 and K6 can be contactors.

For ease of understanding, the charging control method of the power receiving apparatus according to the embodiment of the present invention is described below with reference to fig. 5, 6 (a), 6 (b):

referring to fig. 5 and fig. 6 (a), when the power receiving apparatus is in a sleep state and the charging interface of the power receiving apparatus is connected to the power supply apparatus, the power receiving apparatus controller obtains the voltage of the first detection point J1, and determines whether the voltage of J1 is the first voltage u1×r4/(r4+r1), such as 4V, where the switches S1, S2 are normally closed switches. If so, the powered device controller controls the powered device to transition from the sleep state to the awake state, i.e., wakes up the powered device. Furthermore, the power receiving device controller may further obtain the voltage at the second detection point J2, and determine whether the voltage at the second detection point J2 is the second voltage u2×r3/(r3+r5), for example, 6V, where the switch S3 is a normally closed switch. If yes, the power receiving device controller can judge whether a power supply device message is received, and if yes, a power supply mode message is sent to the power supply device. Before sending the power supply mode message to the power supply device, the power receiving device controller may further obtain a battery temperature, and send the power supply mode message to the power supply device when the battery temperature is less than a first temperature threshold value, so as to execute a heating process before charging the battery, or send a charging message to the power supply device, so as to execute a charging process.

Meanwhile, referring to fig. 5 and fig. 6 (a), when the charging interface of the powered device is connected to the power supply device, the power supply device may acquire the voltage of the third detection point J3, and determine whether the voltage of J3 is the first voltage U1×r4/(r4+r1), for example, 4V. If so, the device controller controls the electronic lock to lock, and after the electronic lock locks (the charging gun is not allowed to be pulled out at the moment), the power supply device can send a message to the power receiving device periodically.

Referring to fig. 5 and fig. 6 (b), after the powered device sends a power mode message to the power supply device, the power supply device controller may determine whether a message for requesting to enter the power supply mode of the powered device is received. If so, the power supply device controller may determine whether to allow the power receiving device to enter the charging mode, if not, exit the procedure, and if so, send a message to the power receiving device to allow to enter the power supply mode. After receiving the power supply device permission message, the power receiving device may open the main contactor (i.e., the main switch described above) to open the electrical connection between the charging interface and the battery pack, and simultaneously control the heating contactor K7 (i.e., the heating switch described above) to close. And the powered device controller can control the K5 and K6 contactors to be closed and send a powered device demand message to the power supply device. After receiving the power receiving device demand message within a preset time (e.g. 30 s), the power supply device controls the K1 and K2 contactors to be closed, and outputs electric energy to the battery heating system 130 according to the power receiving device demand message.

In the battery heating process, the powered device controller can acquire the battery temperature in real time, adjust the powered device demand message, and send the adjusted powered device demand message to the power supply device so as to adjust the demand voltage/current of the power supply device for outputting electric energy to the battery heating system. When the battery temperature rises to the second temperature threshold, the powered device controller may send a power mode exit message to the power supply device, and control the contactors K7, K5, K6 to open, thereby stopping sending the power mode exit message. When the power supply equipment receives a message of exiting the power supply mode, energy output can be stopped, and when the output voltage of the power supply equipment is reduced to a preset threshold (such as 60V), the contactors K1 and K2 are controlled to be disconnected, the electronic lock is controlled to be unlocked, and the charging gun can be pulled out.

It should be noted that, after the battery is heated, the contactors K1, K2, K5, K6 are controlled to be turned off, so as to prepare for charging the battery pack, i.e. before charging, the contactors required for charging are all set in a reset state, so as to ensure smooth proceeding of the charging flow.

Based on the charging control method applied to the powered device in the above embodiment, the invention further provides a powered device controller.

In this embodiment, the power receiving apparatus controller includes a memory, a processor, and a computer program stored on the memory, characterized in that the computer program, when executed by the processor, implements the charging control method applied to the power receiving apparatus of the above-described embodiment.

The invention further provides a charging control method applied to the power supply equipment.

Fig. 7 is a flowchart of a charging control method applied to a power supply apparatus according to an embodiment of the present invention.

As shown in fig. 7, the charge control method applied to the power supply apparatus includes:

and S61, after the power supply interface of the power supply equipment is detected to be connected with the charging interface, a sixth message is sent to the power receiving equipment, so that the power receiving equipment breaks the electrical connection between the battery pack and the charging interface and controls the heating switch to be closed when the battery temperature of the battery pack is smaller than a first temperature threshold.

And S62, when the first message sent by the powered device is received, heating voltage/current corresponding to the first message is provided for the battery heating system so as to heat the battery pack.

In one embodiment of the present invention, as shown in fig. 8, the charging control method applied to the power supply apparatus may further include:

and S63, stopping providing heating voltage/current for the battery heating system when receiving a second message sent by the power receiving equipment, wherein the power receiving equipment sends the second message when the temperature of the battery rises to a second temperature threshold value, and the second temperature threshold value is larger than the first temperature threshold value.

In one embodiment of the present invention, the power supply apparatus may include an electronic lock, and the charging control method applied to the power supply apparatus may further include: before a sixth message is sent to the powered device, controlling the electronic lock to lock; and after the power supply equipment stops providing the heating voltage/current to the battery heating system and the output voltage of the power supply equipment is smaller than the voltage threshold value, controlling the electronic lock to be unlocked.

In one embodiment of the present invention, after detecting that the battery temperature is less than the first temperature threshold, the power receiving device disconnects the electrical connection between the battery pack and the charging interface, and before controlling the heating switch to close, further sends a fourth message to the power supply device, and the method further includes: when the fourth message is received, determining whether the powered device is allowed to enter a power supply mode; and if so, sending an allow fifth message to the power receiving equipment so as to control the power receiving equipment to enter a power supply mode.

In the embodiment of the present invention, as shown in fig. 5, power supply switches K1 and K2 are connected between the power supply interface 210 and the power supply 220 of the power supply device. When a first message sent by powered equipment is received for the first time, the power supply switches K1 and K2 are controlled to be closed; and when a second message sent by the powered device is received, the power supply switch is controlled to be turned off. The power supply switches K1, K2 may be contactors.

In one embodiment of the present invention, the charging control method applied to the power supply apparatus may further include: the output voltage of the power supply device is voltage-pre-charged so that the difference between the output voltage of the power supply device and the current voltage of the battery pack is small.

In this embodiment, after detecting that the contactors K5, K6 are closed, the output voltage of the power supply device is adjusted first, and the contactors K1, K2 are closed again when the output voltage of the power supply device is close to the current voltage of the battery pack. Before the contactors K1 and K2 are closed, the battery pack is disconnected from a charging loop of the power supply equipment, and current provided by the battery pack does not flow back to the power supply equipment; when the contactors K1 and K2 are closed, the voltages at the two ends of the battery pack and the power supply equipment are relatively close, and larger impact current cannot be formed, so that the safety problem existing in the process of starting charging is solved.

It should be noted that, for other specific implementations of the charging control method applied to the power supply device according to the embodiment of the present invention, reference may be made to the above description of the specific implementations of the charging control method applied to the power receiving device.

Based on the charging control method applied to the power supply equipment in the embodiment, the invention further provides a power supply equipment controller.

In this embodiment, the device controller includes a memory, a processor, and a computer program stored on the memory, wherein the computer program, when executed by the processor, implements the charging control method applied to the power supply device of the above-described embodiment.

According to the charging control method, the power receiving device controller and the power supply device controller, when the charging interface of the power receiving device is connected with the power supply device, the battery temperature of the battery pack of the power receiving device is obtained, when the battery temperature is smaller than the first temperature threshold, the electric connection between the battery pack and the charging interface is disconnected, the heating switch is controlled to be closed, and further a first message is sent to the power supply device, so that the power supply device provides heating voltage/current corresponding to the first message for the battery heating system to heat the battery pack. Therefore, when the power receiving equipment is charged by inserting the gun at a low temperature, the power supply equipment can heat the battery pack so as to charge the battery pack better later.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium may even be paper or other suitable medium upon which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings, it is used merely for convenience in describing the invention and to simplify the description and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (15)

1. A charging control method applied to a powered device, wherein the powered device includes a charging interface, a battery pack, a battery heating system, and a heating switch, the heating switch being configured to connect the battery heating system and the charging interface, the method comprising:

the charging interface is used for connecting with power supply equipment;

acquiring battery parameters of the battery pack, wherein the battery parameters comprise battery temperature;

when the battery temperature is smaller than a first temperature threshold, the electric connection between the battery pack and the charging interface is disconnected, and the heating switch is controlled to be closed;

and sending a first message to the power supply equipment so that the power supply equipment provides heating voltage/current corresponding to the first message for the battery heating system to heat the battery pack.

2. The charge control method according to claim 1, characterized in that the method further comprises:

and when the temperature of the battery is detected to be increased to a second temperature threshold, sending a second message to the power supply equipment, so that the power supply equipment stops providing heating voltage/current for the battery heating system, and controlling the heating switch to be turned off, wherein the second temperature threshold is larger than the first temperature threshold.

3. The charge control method according to claim 2, characterized in that the method further comprises:

when the temperature of the battery is detected to be increased to a second temperature threshold, establishing electrical connection between the battery pack and the charging interface, and sending a third message to the power supply equipment so that the power supply equipment provides charging voltage/current for the battery pack, wherein the second temperature threshold is larger than the first temperature threshold.

4. The charge control method of claim 1, wherein after detecting that the battery temperature is less than a first temperature threshold, the method further comprises, before disconnecting the electrical connection between the battery pack and the charging interface and controlling the heating switch to close:

sending a fourth message to the power supply device, so that the power supply device determines whether to allow the power receiving device to enter a power supply mode;

and when a fifth message sent by the power supply equipment is received, controlling the power receiving equipment to enter the power supply mode.

5. The charge control method according to claim 1, characterized in that before transmitting the first message to the power supply apparatus, the method further comprises:

and generating the first message according to the battery temperature, wherein the heating voltage/current is inversely related to the battery temperature.

6. The charge control method according to claim 1, characterized in that before transmitting the first message to the power supply apparatus, the method further comprises:

obtaining a temperature range according to the battery temperature, wherein the temperature range is a difference value between a maximum battery temperature and a minimum battery temperature;

and generating the first message according to the temperature range, wherein the heating voltage/current is inversely related to the temperature range.

7. The charge control method of claim 2, wherein a charge switch is further connected between the charge interface and the power battery and the heating switch, wherein,

when the heating switch is controlled to be closed, the charging switch is also controlled to be closed;

and when the heating switch is controlled to be turned off, the charging switch is also controlled to be turned off.

8. A charging control method applied to a power supply device, wherein the power supply device is configured to supply power to a power receiving device, the power receiving device includes a charging interface, a battery pack, a battery heating system, and a heating switch, and the heating switch is configured to connect the battery heating system and the charging interface, the method includes:

after detecting that a power supply interface of a power supply device is connected with the charging interface, sending a sixth message to the power receiving device, so that the power receiving device disconnects the electrical connection between the battery pack and the charging interface and controls the heating switch to be closed when the battery temperature of the battery pack is smaller than a first temperature threshold;

and when a first message sent by the powered device is received, providing a heating voltage/current corresponding to the first message for the battery heating system so as to heat the battery pack.

9. The charge control method according to claim 8, characterized in that the method further comprises:

and stopping providing heating voltage/current for the battery heating system when receiving a second message sent by the powered device, wherein the powered device sends the second message when the battery temperature rises to a second temperature threshold value, and the second temperature threshold value is larger than the first temperature threshold value.

10. The charge control method according to claim 9, wherein the power supply apparatus includes an electronic lock, the method further comprising:

before the sixth message is sent to the powered device, controlling the electronic lock to be locked;

and after the power supply equipment stops providing the heating voltage/current for the battery heating system and the output voltage of the power supply equipment is smaller than a voltage threshold value, controlling the electronic lock to be unlocked.

11. The charge control method of claim 8, wherein the powered device, after detecting that the battery temperature is less than a first temperature threshold, disconnects the electrical connection between the battery pack and the charging interface and before controlling the heating switch to close, further sends a fourth message to the power sourcing equipment, the method further comprising:

when the fourth message is received, determining whether the powered device is allowed to enter a power supply mode;

and if so, sending a fifth message to the power receiving equipment so as to enable the power receiving equipment to enter the power supply mode.

12. The method according to claim 8, wherein a power supply switch is connected between the power supply interface and a power supply source of the power supply apparatus, wherein,

when a first message sent by the powered device is received for the first time, the power supply switch is controlled to be closed;

and when a second message sent by the powered device is received, controlling the power supply switch to be disconnected.

13. The charge control method according to claim 12, characterized in that the method further comprises:

and carrying out voltage pre-charging on the output voltage of the power supply equipment.

14. A powered device controller comprising a memory, a processor and a computer program stored on the memory, wherein the computer program, when executed by the processor, implements the charge control method according to any one of claims 1-7.

15. A power supply device controller comprising a memory, a processor and a computer program stored on the memory, wherein the computer program, when executed by the processor, implements the charge control method of any one of claims 8-13.