Power battery system, heating control method and device, equipment and storage medium

Abstract

The application discloses a power battery system, a battery charging control method and device, equipment and a storage medium. The power battery system comprises a power supply module, a direct-current charging module, a current control module and a load circuit. The direct-current charging module is connected between the positive and negative terminals of the power supply module, and the load circuit is connected between the positive and negative terminals of the direct-current charging module. The current control module is arranged between the direct-current charging module and the power supply module, and is used for controlling the current transmission direction between the direct-current charging module and the power supply module. The application can charge at low temperature, and can perform a fast battery charging process without connecting with a charging device for multiple times.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to a power battery system, a battery charging control method, a device, an equipment, and a storage medium. Background Technology

[0002] With the continuous development of power battery technology, power batteries have been widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields. However, the use of power batteries in low-temperature environments is subject to certain limitations. Specifically, the discharge capacity of power batteries will severely decline in low-temperature environments, and batteries may be unable to be charged, significantly reducing user satisfaction with the driving experience.

[0003] When charging existing power batteries in low-temperature environments (below 0°C), they first need to discharge a small current to the outside, and then the battery heating module (heating film or PTC) continuously heats the battery. Only after the battery temperature rises to a certain value can the charging equipment begin charging. However, when the power battery is at a low charge level (5%~10%) in a low-temperature environment, it cannot discharge due to the extremely low temperature and charge, and the battery heating module cannot function.

[0004] To solve the above problems, a dedicated charger can be installed on the electrical equipment to charge the battery heating module. After the electrical equipment is connected to the charging equipment, the charger must first supply power to the battery heating module to heat the battery pack. Only after the battery pack reaches a certain temperature can normal charging begin. However, after heating the battery pack, it must be reconnected to the charging equipment (plug-in) for normal charging to start. Therefore, this charging process requires constant monitoring of the electrical equipment, which is inconvenient for users and for those traveling.

[0005] It should be noted that the above statements are only used to provide background information related to this application and do not necessarily constitute prior art. Summary of the Invention

[0006] In view of the above problems, embodiments of this application provide a power battery system, a battery charging control method, an apparatus, a device, and a storage medium. After the system is connected to the charging device, it can charge at low temperatures without having to connect to the charging device multiple times, thus achieving rapid battery charging.

[0007] In a first aspect, embodiments of this application provide a power battery system, including: a power supply module, a DC charging module, a current control module, and a load circuit, wherein the DC charging module is connected between the positive and negative terminals of the power supply module, and the load circuit is connected between the positive and negative terminals of the DC charging module.

[0008] The current control module is located between the DC charging module and the power supply module, and is used to control the current transmission direction between the DC charging module and the power supply module.

[0009] Using the power battery system provided in this embodiment, when the battery temperature of the power supply module is low, the current transmission direction between the DC charging module and the power supply module can be controlled to be opposite to the current output direction of the DC charging module. That is, the current is transmitted from the positive terminal of the power supply module to the positive terminal of the DC charging module, and from the negative terminal of the DC charging module to the negative terminal of the power supply module. In this case, the DC charging module cannot charge the battery, but instead supplies power to the load circuit. When the battery temperature of the power supply module reaches a certain threshold, the current transmission direction between the DC charging module and the power supply module can be controlled to be opposite to the current output direction of the DC charging module. That is, the current is transmitted from the positive terminal of the DC charging module to the positive terminal of the power supply module, and from the negative terminal of the power supply module to the negative terminal of the DC charging module. In this case, the DC charging module can charge the battery. Thus, when the electrical equipment is in a low-temperature, low-charge condition, the DC charging module, after connecting to the charging equipment, can maintain the communication connection between the electrical equipment and the charging equipment. It can preheat the battery before charging, and after the battery is heated, there is no need to disconnect and reconnect the DC charging module to the charging equipment. That is, after the battery is heated, there is no need to unplug and plug the charging gun again, nor is it necessary for personnel to constantly monitor the battery heating status of the electrical equipment, making it more convenient for users and for travel. Furthermore, the power battery system provided in this application embodiment does not require modification of the communication protocol between the system and the charging equipment, and can meet the requirements of almost all existing charging equipment that conforms to international standards, demonstrating great practicality and versatility.

[0010] In some embodiments, the current control module includes a first circuit and a second circuit connected in parallel. When the first circuit is on, a charging loop is formed between the DC charging module and the power supply module. When the second circuit is on, the DC charging module and the power supply module are unidirectionally connected, and the current conduction direction is opposite to the current output direction of the DC charging module. Thus, by setting up two parallel circuits, the on / off state of the two circuits can be controlled to determine whether the DC charging module can supply power to the power supply module. That is, when the battery temperature is low and cannot meet the charging requirements, the first circuit is disconnected while the second circuit is on, at which time the DC charging module supplies power to the load circuit to heat the battery. Conversely, when the battery temperature reaches a certain threshold and meets the charging requirements, the first circuit can be turned on, at which time the DC charging module supplies power to the power supply module, enabling low-temperature charging of the DC charging module when the battery temperature is low.

[0011] In some embodiments, the first circuit includes a first switch disposed between the same-direction terminals of the power supply module and the DC charging module. Thus, by controlling the first switch to close, the first circuit can be turned on, allowing the current output from the DC charging module to be input to the power supply module.

[0012] The first switch, the subsequent second switch, the control switch, and the precharge switch can all be, but are not limited to, relays, contactors, etc., as long as they can enable the circuit to be turned on and off.

[0013] In some embodiments, the second circuit includes a controllable device disposed between the same-direction terminals of the power supply module and the DC charging module, controlling unidirectional conduction between the DC charging module and the power supply module, with the current conduction direction opposite to the current output direction of the DC charging module. Thus, by controlling the controllable device to close, the second circuit can be turned on, allowing the battery output current to be input to the DC charging module.

[0014] In some embodiments, the controllable device includes a diode and a second switch connected in series. The positive terminal of the diode is connected to the positive terminal of the power supply module, and the negative terminal of the diode is connected to the positive terminal of the DC charging module. Thus, when the battery temperature meets the charging requirements, the second switch can be controlled to open, preventing the diode from being damaged by the high voltage of the DC charging module.

[0015] In some embodiments, the controllable device includes a diode and a second switch connected in series. The positive terminal of the diode is connected to the negative terminal of the DC charging module, and the negative terminal of the diode is connected to the negative terminal of the power supply module. Thus, if the battery temperature does not meet the charging requirements, the second switch can be controlled to close (the first switch open), ensuring that the current between the DC charging module and the battery flows only from the positive terminal of the battery to the positive terminal of the DC charging module, and vice versa.

[0016] In some embodiments, the load circuit includes a battery heating module connected between the positive and negative terminals of the DC charging module and positioned near the battery in the power supply module to heat the battery. When the battery temperature is very low and cannot meet the charging requirements of the device (e.g., temperature greater than 0°C), the DC charging module can be controlled to charge the battery heating module first. The battery heating module generates heat, thus heating the battery. A current control module controls the current between the power supply module and the DC charging module to flow only from the power supply module to the DC charging module, preventing a large current output from the DC charging module from flowing into the power supply module when the battery temperature is low, which could lead to charging failure or even lithium plating. Furthermore, since the DC charging module supplies power to the load circuit, it maintains the communication connection between the charging device, the power battery, and the device, eliminating the need to reconnect after heating is complete. This eliminates the need to repeatedly plug and unplug the charging gun, making it more convenient for users and travelers.

[0017] In some embodiments, the load circuit further includes a heating system disposed between the positive and negative terminals of the DC charging module. Thus, when the heating system is connected to the DC charging module, the internal space of the electrical device can be heated during battery heating and charging, increasing the temperature inside the device and further improving user satisfaction.

[0018] Secondly, embodiments of this application provide a battery charging system, including a charging device and the power battery system described in the first aspect; the charging device is connected to the DC charging module.

[0019] Thirdly, embodiments of this application provide a battery charging control method applied to the power battery system described in the first aspect, the method comprising:

[0020] If the temperature of the battery in the power supply module is detected to be lower than a first threshold, the current control module controls the current transmission direction between the DC charging module and the power supply module, and forms a charging loop between the DC charging module and the load circuit.

[0021] If the temperature of the battery in the power supply module is detected to be greater than or equal to the first threshold, the current control module controls the current transmission direction between the DC charging module and the power supply module, and forms a charging circuit between the DC charging module and the power supply module.

[0022] In some embodiments, controlling the current transmission direction between the DC charging module and the power supply module through the current control module, and forming a charging loop between the DC charging module and the load circuit, includes:

[0023] The second circuit of the current control module is turned on, the first circuit is turned off, and the direction of current transmission is controlled to be opposite to the direction of current output of the DC charging module;

[0024] Control the circuit connection between the DC charging module and the load circuit to form a charging loop between the DC charging module and the load power supply.

[0025] In some embodiments, controlling the current transmission direction between the DC charging module and the power supply module through the current control module, and forming a charging circuit between the DC charging module and the power supply module, includes:

[0026] The first circuit of the current control module is turned on and the second circuit is turned off, so that the current transmission direction is the same as the current transmission direction of the DC charging module.

[0027] The circuit between the DC charging module and the power supply module is controlled to conduct, forming a charging loop between the DC charging module and the power supply module.

[0028] In some embodiments, after detecting that the temperature of the battery in the power supply module is less than a first threshold, and controlling the current transmission direction between the DC charging module and the power supply module through the current control module to form a charging circuit between the DC charging module and the power supply module, the method further includes:

[0029] If the temperature of the battery is detected to be less than or equal to a second threshold, a heating circuit is formed between the power supply module and the drive module of the power battery system; the second threshold is less than the first threshold.

[0030] If the temperature of the battery is detected to be greater than or equal to a third threshold, the heating circuit is controlled to disconnect; the third threshold is greater than the second threshold and less than the first threshold.

[0031] In some embodiments, after forming the charging circuit between the DC charging module and the power supply module, the method further includes:

[0032] If the temperature of the battery is detected to be greater than or equal to the first threshold, the circuit between the DC charging module and the load circuit is disconnected, and the circuit between the DC charging module, the current control module and the power supply module is turned on.

[0033] Fourthly, embodiments of this application provide a battery charging control device, the battery charging control device comprising:

[0034] The first control module is used to control the current transmission direction between the DC charging module and the power supply module through the current control module when the temperature of the battery in the power supply module is less than a first threshold, and to form a charging circuit between the DC charging module and the power supply module.

[0035] The second control module is used to control the current transmission direction between the DC charging module and the power supply module through the current control module when the temperature of the battery in the power supply module is detected to be greater than or equal to the first threshold, and to form a charging circuit between the DC charging module and the power supply module.

[0036] Fifthly, embodiments of this application provide an electrical device including the power battery system described in the first aspect.

[0037] In a sixth aspect, embodiments of this application provide an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor running the computer program to implement the method as described in the first aspect.

[0038] In a seventh aspect, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, the program being executed by a processor to implement the method described in the first aspect.

[0039] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 A schematic diagram of the structure of an electrical device using a power battery system provided in some embodiments of this application;

[0042] Figure 2 This is a schematic diagram of the frame structure of the power battery system provided in some embodiments of this application;

[0043] Figure 3 This is a schematic diagram of the specific structure of the power battery system in some embodiments of this application;

[0044] Figure 4 This is a schematic diagram of the specific structure of the power battery system in some other embodiments of this application;

[0045] Figure 5 This is a schematic diagram of the specific structure of the current control module in some embodiments of this application;

[0046] Figure 6 This is a schematic diagram of the specific structure of the current control module in some other embodiments of this application.

[0047] Figure 7 This is a schematic flowchart of a battery charging control method provided in some embodiments of this application;

[0048] Figure 8 This is a schematic flowchart of a battery charging control method provided in other embodiments of this application;

[0049] Figure 9 This is a schematic diagram of the processing logic of a battery charging control method provided in some embodiments of this application;

[0050] Figure 10 This is a schematic diagram of the structure of a battery charging control device provided in some embodiments of this application;

[0051] Figure 11 The present application provides a schematic diagram of the structure of an electronic device according to some embodiments;

[0052] Figure 12 A schematic diagram of a storage medium provided in some embodiments of this application is shown. Detailed Implementation

[0053] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of this application pertain; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.

[0055] In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0060] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0061] Although power battery systems have been widely used in new energy vehicles, it is well known that battery charging has always been a major constraint limiting the faster development of new energy vehicles. For power batteries, fast charging remains a technical challenge that needs to be overcome by those skilled in the art, especially battery charging in low-temperature environments (understandable as temperatures below 0°C). Because lithium plating is prone to occur when charging batteries at low temperatures, high-current fast charging is often not possible when charging batteries through charging equipment in low-temperature environments. It is necessary to first heat the battery to a certain temperature (e.g., above 0°C) before using high-current charging.

[0062] In related technologies, when electrical devices (such as, but not limited to, electric vehicles) are charged in low-temperature environments (below 0°C), the battery needs to be heated first by discharging a small current from the battery pack and by continuously operating a battery heating module (heating film or PTC). Only after the battery pack temperature rises to a certain level can the battery be charged through the charging equipment. However, when the electrical device is in a low-temperature, low-charge state (battery state of charge is 5%~10%) situation, the battery pack cannot continuously discharge due to the low temperature and low charge, and the battery heating module cannot work. In this case, power can only be supplied to the battery heating module attached to the battery through the AC charging interface via the on-board charger (OBC). The battery heating module heats up the battery pack, and again, the battery pack temperature must rise to a certain level before the battery can be charged through the charging equipment.

[0063] The aforementioned pre-heating charging method requires a slow-charging interface on the charging equipment. Since the battery heating module is typically a low-power device, it supplies a small current to the heating module to heat the battery. If the equipment lacks a slow-charging interface (e.g., commercial electric vehicles only have fast-charging interfaces), only a large current can be transmitted. In low-temperature, low-SOC environments, the vehicle may become unusable and unable to charge. Furthermore, with this method, the DC charging module of the power battery system connects to the charging equipment, heats the battery, and then disconnects after heating. The DC charging module must then reconnect to the charging equipment to begin fast charging. Before the battery is fully heated, personnel must constantly monitor the equipment to check if the battery has heated successfully, which is inconvenient for users and hinders travel.

[0064] In addition, by modifying the communication protocol of the charging equipment, an auxiliary heating function can be added, enabling the charging equipment to recognize and heat the vehicle during charging in low-temperature environments. However, this solution requires the development of entirely new, specialized charging equipment and cannot use the current national standard charging protocol. The charging protocol needs to be adjusted, and existing charging equipment on the market cannot yet apply the new protocol. Furthermore, modifying the communication protocol may require corresponding electronic components for assistance and implementation, which is also costly. Therefore, currently, achieving the charging and heating process of power batteries in low-temperature environments by modifying the communication protocol of the charging equipment still faces many technical and economic challenges that need to be overcome.

[0065] Based on the above considerations, this application proposes a power battery system, including a power supply module and a DC charging module, as well as a current control module and a load circuit. The DC charging module can be connected between the positive and negative terminals of the power supply module, and the load circuit can be connected between the positive and negative terminals of the DC charging module. The current control module can be located between the DC charging module and the power supply module to control the direction of current transmission between them, thereby controlling whether the DC charging module supplies power to the power supply module or to the load circuit, thus forming a charging loop between the DC charging module, the load circuit, and the power supply module.

[0066] Using the power battery system provided in this embodiment, when the battery temperature of the power supply module is low, the current transmission direction between the DC charging module and the power supply module can be controlled to be opposite to the current output direction of the DC charging module. That is, the current is transmitted from the positive terminal of the power supply module to the positive terminal of the DC charging module, and from the negative terminal of the DC charging module to the negative terminal of the power supply module. In this case, the DC charging module cannot charge the battery, but instead supplies power to the load circuit. When the battery temperature of the power supply module reaches a certain threshold, the battery can be charged normally. The current transmission direction between the DC charging module and the power supply module can be controlled to be the same as the current output direction of the DC charging module, that is, the current is transmitted from the positive terminal of the DC charging module to the positive terminal of the power supply module, and from the negative terminal of the power supply module to the negative terminal of the DC charging module. In this case, the DC charging module can charge the battery. Thus, when the electrical equipment is in a low-temperature, low-charge condition, the DC charging module, after connecting to the charging equipment, can maintain the communication connection between the electrical equipment and the charging equipment. It can preheat the battery before charging, and after the battery is heated, there is no need to disconnect and reconnect the DC charging module to the charging equipment. That is, after the battery is heated, there is no need to unplug and plug the charging gun again, nor is it necessary for personnel to constantly monitor the battery heating status of the electrical equipment, making it more convenient for users and for travel. Furthermore, the power battery system provided in this application embodiment does not require modification of the communication protocol between the system and the charging equipment, and can meet the requirements of almost all existing charging equipment that conforms to international standards, demonstrating great practicality and versatility.

[0067] It is understood that the power battery system in the embodiments of this application may only disclose the necessary structural features for implementing the embodiments of this application. Other existing necessary structures, such as drive modules, circuit connection lines and other devices, if not mentioned in the embodiments of this application, can be regarded as implicit disclosure.

[0068] The power battery system disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. The power system of such electrical equipment can be composed of the power battery system disclosed in the embodiments of this application. This is beneficial for improving the charging efficiency of the power battery system, reducing charging time, further meeting the fast charging needs of electrical equipment, and thereby improving the user experience satisfaction of the electrical equipment.

[0069] This application provides an electrical device that uses a battery as a power source. This device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0070] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0071] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 has an internal power battery system, which includes a battery 100. The battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The power battery system may also include a controller 200 and a motor 300. The controller 200 controls the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0072] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0073] Please refer to Figure 2 , Figure 2This is a schematic diagram of the structure of a power battery system provided in some embodiments of this application, such as... Figure 2 As shown, the power battery system includes a power supply module, a DC charging module, a current control module, and a load circuit. The DC charging module is connected between the positive and negative terminals of the power supply module, and the load circuit is connected between the positive and negative terminals of the DC charging module. The current control module is located between the DC charging module and the power supply module and is used to control the direction of current transmission between the DC charging module and the power supply module.

[0074] The power supply module may include a battery, a battery management system (BMS), and some control devices. The battery can be a power battery, and includes at least one battery pack. The battery pack can be a collection of multiple battery modules or a battery module consisting of multiple cells. The battery management system can connect to the vehicle control unit (VCU) to collect, process, and store information during battery operation (such as voltage, temperature, charge, and current), and exchange information with external devices such as the vehicle control unit to ensure safe and reliable battery operation.

[0075] The aforementioned control devices can be located between the battery and the drive module. These control devices can be used to control the connection and disconnection of various local circuits within the power battery system to achieve various functions of the power battery system, such as, but not limited to, power supply, self-heating, preheating, and circuit safety protection. Specifically, the control devices may include, but are not limited to, a high-voltage power distribution unit (PDU), a manual service disconnect (MSD), bus capacitors, passive discharge resistors, high-voltage switches (including but not limited to relays and contactors), precharge control components, fuses, voltage and / or current sensors, high-voltage wiring harnesses, and high-voltage connectors.

[0076] The pre-charge control component can be installed on either the positive or negative bus of the battery to control the power battery system to complete the high-voltage power-on process. For example... Figure 3 As shown, taking the pre-charge control component located on the positive bus of the battery as an example, the pre-charge control component can be connected in parallel with the positive main control switch K3 on the positive bus. Specifically, it can include a pre-charge resistor and a pre-charge switch K4 connected in series. When high-voltage power-on is required, the pre-charge switch and the negative main control switch K5 on the negative bus can be turned on, and the main control switch K3 on the positive bus can be turned off. When the voltage across the pre-charge resistor reaches the pre-charge voltage value, the pre-charge is considered complete. Then, the negative main control switch K5 on the negative bus can be turned on, and the pre-charge switch K4 can be turned off to complete the high-voltage power-on process.

[0077] It is understood that this embodiment does not specifically limit the position of the main control switch and the pre-charge control component. That is, the pre-charge control component can also be set on the negative bus of the battery. When high voltage is required, the pre-charge switch K4 and the positive main control switch K3 on the positive bus can be turned on, and the negative main control switch K5 on the negative bus can be turned off. When the voltage across the pre-charge resistor reaches the pre-charge voltage value, the pre-charge can be considered to be completed.

[0078] The drive module may include a motor and a motor controller, forming a charging and discharging circuit between the power supply modules to heat the battery. The motor controller can be implemented using various types of switches. For example, it can be implemented by an inverter in the motor drive system, where the inverter can be implemented using an arm circuit of an Insulated Gate Bipolar Transistor (IGBT). Specifically, the number of arms in the arm circuit is the same as the number of windings in the motor, and can be, but is not limited to, three-phase, six-phase, etc. For example, the motor may be a three-phase motor, and the arm circuit may include three-phase arms, including A-phase, B-phase, and C-phase arms, or U-phase, V-phase, and W-phase arms.

[0079] Each phase bridge arm has an upper bridge arm and a lower bridge arm, and each upper bridge arm and lower bridge arm is equipped with a switching unit, which includes a transistor and a diode connected in parallel. When the current through the bridge arm is greater than the conduction threshold of the diode, the diode can be reverse-conducted, thereby providing overcurrent protection for the transistor.

[0080] The motor may include M-phase windings, with multiple windings connected collinearly and sharing a common connection point, referred to as the neutral line and neutral point. The end of each winding furthest from the neutral point is connected to the connection points of the upper and lower arms of a phase bridge arm, respectively. The battery pack, the M-phase bridge arm, and the motor are connected in parallel, with the upper and lower arm connection points of the M-phase bridge arm corresponding one-to-one with the M-phase windings of the M-phase motor.

[0081] It is understood that the aforementioned motor is not limited to a three-phase motor, but can also be a six-phase, twelve-phase, or other type. Correspondingly, the motor controller can also include six-phase bridge arms. Furthermore, the number of upper bridge arms and lower bridge arms that are turned on each time can be the same or different; this embodiment does not impose specific limitations on this.

[0082] The DC charging module can be adapted to charging devices with different voltages and power ratings, and its output voltage and power are matched with the drive module. The current output by the DC charging module can be transmitted to the battery in the power supply module, thereby charging the battery. Specifically, the positive terminal of the DC charging module can be connected to the positive terminal bus of the battery, and the negative terminal of the DC charging module can be connected to the negative terminal bus of the battery. A first control switch K6 can be installed between the positive terminal of the DC charging module and the positive terminal bus of the battery, and a second control switch K7 can be installed between the negative terminal of the DC charging module and the negative terminal bus of the battery to better control the charging circuit between the DC charging module and the power supply module.

[0083] The current control module can include either analog or digital circuits, as long as it is positioned between the DC charging module and the power supply module and can control the direction of current transmission between them. Specifically, when the battery temperature is very low (e.g., below 0°C) and cannot meet the charging requirements of the device, the direction of current transmission between the DC charging module and the power supply module can be controlled to be opposite to the current output direction of the DC charging module. That is, the current flows from the positive terminal of the power supply module to the positive terminal of the DC charging module, and from the negative terminal of the DC charging module to the negative terminal of the power supply module. At this time, the battery outputs current, resulting in a small current transmission between the DC charging module and the power supply module, allowing communication between the battery and the device. Since the direction of current transmission between the DC charging module and the power supply module is opposite to the current output direction of the DC charging module, the DC charging module cannot charge the power supply module but instead supplies power to the load circuit. The battery heating module in the load circuit generates heat, which can then heat the battery. When the battery temperature meets the charging requirements of the electrical equipment (e.g., the temperature is greater than 0℃), the current transmission direction between the DC charging module and the power supply module can be controlled to be the same as the current output direction of the DC charging module. That is, the positive terminal of the DC charging module is transmitted to the positive terminal of the power supply module, and the negative terminal of the self-power supply module is transmitted to the negative terminal of the DC charging module. In this way, the DC charging module can charge the power supply module (and can also supply power to the load circuit if needed).

[0084] Specifically, the current control module can be as follows: Figure 3 As shown, it is set on the positive terminal bus of the battery, or as... Figure 4 As shown, it is set on the negative terminal bus of the battery, and it is only necessary to control the direction of current transmission between the DC charging module and the power supply module.

[0085] In some embodiments, the current control module includes a first circuit and a second circuit connected in parallel. When the first circuit is on, a charging loop is formed between the DC charging module and the power supply module. When the second circuit is on, the DC charging module and the power supply module are unidirectionally connected, and the current conduction direction is opposite to the current transmission direction between the DC charging module and the load circuit. Thus, by setting up two parallel circuits, the on / off state of the two circuits can be controlled to determine whether the DC charging module can supply power to the power supply module. That is, when the battery temperature is low and cannot meet the charging requirements, the first circuit is disconnected while the second circuit is on, at which point the DC charging module supplies power to the load circuit to heat the battery. Conversely, when the battery temperature reaches a certain threshold and meets the charging requirements, the first circuit can be turned on, at which point the DC charging module supplies power to the power supply module, enabling a low-temperature charging process when the battery temperature is low.

[0086] Specifically, the first circuit may include a first switch, which is disposed between the same-direction terminals of the power supply module and the DC charging module. Thus, by controlling the first switch to close, the first circuit can be turned on, allowing the current output from the DC charging module to be input to the power supply module.

[0087] The second circuit includes a controllable device positioned between the same-direction terminals of the power supply module and the DC charging module. This controllable device controls unidirectional conduction between the DC charging module and the power supply module, with the current conduction direction opposite to the current transmission direction between the DC charging module and the load circuit. Thus, by controlling the controllable device to close, the second circuit can be activated, allowing the battery output current to be input into the DC charging module.

[0088] Furthermore, such as Figure 5 As shown, the controllable device may include a diode and a second switch connected in series. In one embodiment, the positive terminal of the diode is connected to the positive terminal of the power supply module, and the negative terminal of the diode is connected to the positive terminal of the DC charging module. In another embodiment, as... Figure 6 As shown, the controllable device includes a diode and a second switch connected in series. The positive terminal of the diode is connected to the negative terminal of the DC charging module, and the negative terminal of the diode is connected to the negative terminal of the power supply module.

[0089] In this embodiment, a diode and a second switch connected in series can be used as controllable devices. The second switch controls whether the second circuit is conducting, and the diode controls the direction of current flow. When the battery temperature meets the charging requirements, the second switch can be opened to prevent the diode from being damaged by the high voltage of the DC charging module. When the battery temperature does not meet the charging requirements, the second switch can be closed (the first switch is open), ensuring that the current between the DC charging module and the battery can only flow from the positive terminal of the battery to the positive terminal of the DC charging module, and from the positive terminal of the DC charging module to the positive terminal of the battery.

[0090] It is understood that the application of the aforementioned controllable device is only one implementation method of this application embodiment, and this embodiment is not limited thereto. For example, it can also be implemented using a thyristor or other controllable devices. Alternatively, the first circuit and the second circuit can be set separately, with one circuit set on the positive terminal bus of the battery and the other circuit set on the negative terminal bus of the battery, as long as both can control the current transmission direction between the DC charging module and the power supply module.

[0091] The load circuit can include any electronic component that can be connected between the positive and negative terminals of the DC charging module, capable of converting the electrical energy transmitted by the DC charging module. In this embodiment, a battery heating module may be included. This module is connected between the positive and negative terminals of the DC charging module and positioned close to the battery in the power supply module to heat the battery. When the battery temperature is very low and cannot meet the charging requirements of the device (e.g., temperature greater than 0°C), the DC charging module can be controlled to charge the battery heating module first. The battery heating module generates heat, thus heating the battery. A current control module controls the current between the power supply module and the DC charging module to flow only from the power supply module to the DC charging module, preventing a large current output from the DC charging module from flowing into the power supply module when the battery temperature is low, which could lead to charging failure or even lithium plating. Furthermore, since the DC charging module supplies power to the load circuit, it maintains the communication connection between the charging device, the power battery, and the device, eliminating the need to reconnect after heating is complete. This eliminates the need to repeatedly plug and unplug the charging gun, making it more convenient for users and travelers.

[0092] Furthermore, a third control switch K8 can be installed between the positive terminal of the DC charging module and the battery heating module, and a fourth control switch K9 can be installed between the negative terminal of the DC charging module and the battery heating module, so as to better control the circuit between the DC charging module and the battery heating module and improve the overall safety and reliability of the power battery system and the electrical equipment.

[0093] Specifically, the battery heating module can be one or both of a PTC (Positive Temperature Coefficient) device and a heating film. This embodiment does not specifically limit the specific material and structure of the battery heating module, as long as it can generate heat during operation and can heat the battery.

[0094] It should be noted that the load circuit may also include a heating system and a DC-DC converter (DCDC). The heating system can be positioned between the positive and negative terminals of the DC charging module. When connected to the DC charging module, it can heat the internal space of the electrical equipment during battery heating and charging, increasing the internal temperature and further improving user satisfaction. The DC-DC converter can also be positioned between the positive and negative terminals of the DC charging module. When connected to the DC charging module, it can convert the DC power transmitted by the DC charging module into the voltage or current required by the load.

[0095] Furthermore, a fifth control switch K10 can be installed between the positive terminal of the DC charging module and the positive terminal of the heating system to better control the circuit between the DC charging module and the heating system, thereby improving the overall safety and reliability of the power battery system and the electrical equipment.

[0096] Based on the same concept as the aforementioned power battery system, this embodiment also provides a battery charging system, including a charging device and the aforementioned power battery system; the charging device is connected to a DC charging module.

[0097] It is understood that the battery charging system provided in this embodiment includes the charging equipment and the aforementioned power battery system, and therefore can at least achieve the beneficial effects that the aforementioned power battery system can achieve, which will not be elaborated here.

[0098] Based on the same concept as the aforementioned power battery system, this embodiment also provides a battery charging control method applied to the aforementioned power battery system. The executing entity in this embodiment can be either the motor controller or the vehicle controller, or it can be jointly executed by both controllers, or it can be a dedicated battery charging control device, or a domain controller. This embodiment does not specifically limit this. For ease of understanding, this embodiment can be specifically described using a battery charging control device as an example (using a vehicle as an example of electrical equipment). Figure 7 As shown, after detecting that the DC charging module is connected to the charging device, the method may include the following steps:

[0099] In step S10, if the temperature of the battery in the power supply module is detected to be lower than the first threshold, the current transmission direction between the DC charging module and the power supply module is controlled by the current control module, and a charging loop is formed between the DC charging module and the load circuit.

[0100] The first threshold can be set according to the specific performance of the battery, and can be determined through a limited number of tests. For example, the lowest temperature at which the battery can be fast-charged using a charging device can be detected through testing, and this lowest temperature can be set as the first threshold.

[0101] In practical applications, before charging the battery with charging equipment, the battery charging control device can first check various parameters of the vehicle and battery, such as battery temperature and charge level, and whether the vehicle is faulty. If the battery temperature is detected to be below a first threshold, the current control module can control the current transmission direction between the DC charging module and the power supply module to be opposite to the current output direction of the DC charging module. That is, the current is transmitted from the positive terminal of the power supply module to the positive terminal of the DC charging module, so that there is current between the DC charging module and the power supply module. Communication can be established between the electrical equipment, the battery, and the vehicle. However, the DC power supply module cannot supply power to the power supply module. Instead, it forms a charging loop with the load circuit and supplies power to the load circuit.

[0102] For a current control module including a first circuit and a second circuit, the above-mentioned steps of controlling the current transmission direction between the DC charging module and the power supply module and forming a charging loop between the DC charging module and the load circuit can include the following processing: controlling the second circuit of the current control module to be turned on and the first circuit to be turned off, controlling the current transmission direction to be opposite to the current output direction of the DC charging module; controlling the circuit between the DC charging module and the load circuit to be turned on, forming a charging loop between the DC charging module and the load power supply.

[0103] In this embodiment, by controlling the second circuit of the current control module to be turned on and the first circuit to be turned off, the direction of current transmission between the DC charging module and the power supply module can be controlled to be opposite to the direction of current output of the DC charging module, that is, the current is transmitted from the positive terminal of the power supply module to the positive terminal of the DC charging module. This ensures that there is current between the DC charging module and the power supply module, allowing communication between the electrical equipment, the battery, and the vehicle. However, since the current direction is opposite to the current output direction of the DC power supply module, the DC charging module cannot supply power to the power supply module. The circuit between the DC charging module and the load circuit can be controlled to be turned on, forming a charging loop between the DC charging module and the load power supply, so that the current output by the DC charging module can be transmitted to the load circuit, allowing the DC charging module to operate normally even when not charging the battery.

[0104] In step S20, if the temperature of the battery in the power supply module is detected to be greater than or equal to the first threshold, the current transmission direction between the DC charging module and the power supply module is controlled by the current control module, and a charging circuit is formed between the DC charging module and the power supply module.

[0105] In practical applications, when the battery temperature is detected to be greater than or equal to the first threshold, the current control module can control the current transmission direction between the DC charging module and the power supply module to be the same as the current output direction of the DC charging module. That is, the positive terminal of the DC charging module is transmitted to the positive terminal of the power supply module, so that the DC charging module can supply power to the power supply module to quickly charge the battery.

[0106] For a current control module including a first circuit and a second circuit, the above-mentioned step of controlling the current transmission direction between the DC charging module and the power supply module and forming a charging circuit between the DC charging module and the power supply module may include the following steps: controlling the first circuit of the current control module to be turned on and the second circuit to be turned off, controlling the current transmission direction to be the same as the current transmission direction of the DC charging module; controlling the circuit between the DC charging module and the power supply module to be turned on, forming a charging circuit between the DC charging module and the power supply module.

[0107] In this embodiment, by controlling the first circuit of the current control module to be turned on and the second circuit to be turned off, the direction of current transmission between the DC charging module and the power supply module can be controlled to be the same as the direction of current output of the DC charging module, that is, from the positive terminal of the DC charging module to the positive terminal of the power supply module. This enables high-current transmission between the DC charging module and the power supply module, allowing the DC charging module to supply power to the power supply module.

[0108] In one embodiment, such as Figure 8 As shown, after step S10 above, the battery charging control method may further include the following steps: Step S30, if the battery temperature is detected to be less than or equal to a second threshold, control the formation of a heating circuit between the power supply module and the drive module of the power battery system; the second threshold is less than the first threshold; Step S40, if the battery temperature is detected to be greater than or equal to a third threshold, control the heating circuit to be disconnected; the third threshold is greater than the second threshold and less than the first threshold.

[0109] The second and third thresholds can be set with reference to the first threshold, i.e., through a limited number of experiments. For example, if experiments show that the battery temperature is lower and heating by the battery heating module alone is slow, the battery self-heating function can be activated, controlling the motor controller of the drive module to conduct, creating a cyclical charging and discharging loop between the battery and the motor to accelerate the battery heating speed. This lower battery temperature can then be set as the second threshold. The same principle applies to setting the third threshold.

[0110] In this embodiment, when the battery temperature is very low (e.g., battery temperature ≤ -10℃), heating the battery solely through the battery heating module may take a relatively long time. To shorten the battery heating time, a heating circuit can be formed between the power supply module and the drive module of the power battery system to accelerate the battery heating time. When the battery temperature is greater than or equal to the third threshold, the heating circuit can be disconnected to prevent the battery from outputting current, thus preparing for fast charging.

[0111] Furthermore, after step S40, the battery charging control method may further include step S50, whereby, if the battery temperature is detected to be greater than or equal to a first threshold, the circuit between the DC charging module and the load circuit is disconnected, and the circuit between the DC charging module, the current control module, and the power supply module is turned on. In this way, disconnecting the circuit between the DC charging module and the load circuit ensures that the current output by the DC charging module flows primarily into the battery, thereby rapidly charging the battery.

[0112] Alternatively, only a portion of the circuit between the load circuit and the DC charging module can be disconnected. For example, the circuit between the heating system and the DC charging module can remain connected, allowing the DC charging module to continuously supply power to the heating system. Once charging is complete, the interior temperature will be more comfortable when the user gets in the car, further improving user satisfaction.

[0113] In some embodiments, taking a vehicle as an example of an electrical device, the battery charging control method is described in detail. Based on the charging control method provided in this embodiment, the charging equipment (e.g., but not limited to electrical devices) can normally output high-voltage electricity to power the vehicle battery pack heating, DC-DC power supply, heating system operation, and other electrical appliances under low temperature and low SOC conditions, while also enabling the pulse heating function. Specific control methods include... Figure 9 As shown, the battery charging control may include the following steps:

[0114] 001) With the vehicle stationary, the user operates the charging equipment and inserts the fast charging gun of the electrical device into the fast charging port of the vehicle;

[0115] 002) After the vehicle detects that the charging gun is connected, if the vehicle is in a powered-off state, it will wake up the battery management system (BMS or domain controller) and the switch control module (BMS, PDU or domain controller) to perform a self-test; if the vehicle is in a high-voltage state, it will maintain the current state, but it must ensure that the vehicle is in an inoperable state; at the same time, the charging equipment will detect that the charging gun is connected to the vehicle and perform a self-test of the electrical equipment.

[0116] 003) After the vehicle and charging equipment complete their self-test, the battery management system checks whether the battery temperature meets the charging requirements. If it does, proceed to step 004; otherwise, proceed to step 005.

[0117] 004) The switch control module sequentially closes the first switch K1 in the current control module and the negative main control switch K5, the second control switch K7, and the first control switch K6 in the switch module;

[0118] 005) Communication and interaction between the battery management system and the DC power supply equipment are completed;

[0119] 006) Enters normal fast charging state;

[0120] 007) such as Figure 1 As shown, the switch control module sequentially closes the second switch K2 in the current control module and the second control switch K7, fourth control switch K9, third control switch K8, negative main control switch K5, fifth control switch K10, and first control switch K6 of the switch module to enter the low-temperature charging mode, and the battery pack outputs voltage to the outside. When the charging equipment detects that the error range between the battery pack terminal voltage and the battery voltage in the CAN communication message is ≤±5% (indicating that the battery pack and the vehicle are fault-free), and is greater than the minimum output voltage of the electrical equipment and less than the maximum output voltage of the electrical equipment, it closes the switch in the charging equipment, so that the charging equipment can output current to the outside, and the DC power supply circuit is turned on.

[0121] 008) After the battery management system and the DC power equipment have completed communication, the charging voltage and current T1 (which can be calibrated) are requested according to the power of the electrical appliances such as the battery heating module, DCDC, and heating system. After receiving the requested charging voltage and current, the charging equipment adjusts the voltage and current output.

[0122] 009) After the electrical equipment outputs power, the battery heating module, DC-DC converter, heating system and other electrical appliances are powered and work normally;

[0123] 010) Determine whether the pulse heating function needs to be activated based on the current battery temperature. If the battery temperature is ≤-10℃ (calibrable), proceed to step 011; otherwise, proceed to step 010.

[0124] 011) The pre-charge control switch K4 in the vehicle closed switch module performs pre-charge. After pre-charge is completed, the positive main control switch K3 is closed, and then the pre-charge control switch K4 is opened to complete the high voltage connection.

[0125] 012) Activate the pulse heating function and enter the pulse heating process;

[0126] 013) When the battery management system detects that the battery temperature has risen to the set temperature T1, it stops pulse heating.

[0127] 014) After the battery heating module continues to heat for a period of time, when the battery management system detects that the battery temperature has risen to the set temperature T2, it stops the operation of the battery heating module, DC-DC converter, heating system and other electrical appliances, and reduces the requested charging current to I2=0 (calibrable).

[0128] 015) The switch control module closes the first switch K1 in the current control module and opens the second switch K2; then the third control switch K8 and the fourth control switch K9 are opened to stop heating, and finally the positive main control switch K3 is opened, while the first control switch K6, the second control switch K7, the fifth control switch K10 and the negative main control switch K5 are kept closed.

[0129] 016) The battery management system requests the charging device to output charging current I3 based on the current allowed charging current of the battery, and then proceeds to step 006).

[0130] It is understood that the description of the various embodiments above tends to emphasize the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, these will not be repeated here.

[0131] In summary, the battery charging control method provided in this application, when the battery temperature of the power supply module is low, below a first threshold, controls the current transmission direction between the DC charging module and the power supply module to be opposite to the current output direction of the DC charging module. That is, the current is transmitted from the positive terminal of the power supply module to the positive terminal of the DC charging module, and from the negative terminal of the DC charging module to the negative terminal of the power supply module. This allows the DC charging module to maintain current transmission with the power supply module, enabling communication between the charging device, the user device, and the battery. However, the DC charging module cannot charge the battery; instead, it supplies power to the load circuit. When the battery temperature of the power supply module reaches the first threshold, the current transmission direction between the DC charging module and the power supply module can be controlled to be consistent with the current output direction of the DC charging module, that is, the current is transmitted from the positive terminal of the DC charging module to the positive terminal of the power supply module. This allows the DC charging module to charge the battery. Thus, when the electrical device is in a low-temperature, low-charge condition, the DC charging module, after connecting to the charging device, can maintain the communication connection between the electrical device and the charging device, and preheat the battery before charging. After the battery is heated, there is no need to disconnect the DC charging module from the charging device and then reconnect it. That is, after the battery is heated, there is no need to unplug and plug the charging gun again, nor is it necessary for personnel to constantly monitor the battery heating status of the electrical device, making it more convenient for users and for travel. Moreover, the power battery system provided in this application embodiment does not require modification of the communication protocol between the device and the charging device, and can meet the requirements of almost all existing charging devices that comply with international standards, exhibiting great practicality and versatility.

[0132] Based on the same concept as the above-described battery charging control method, this application also provides a battery charging control device for implementing the above-described battery charging control method, such as... Figure 10 As shown, the device includes:

[0133] The first control module is used to control the direction of current transmission between the DC charging module and the power supply module through the current control module when the temperature of the battery in the power supply module is less than the first threshold, and to form a charging circuit between the DC charging module and the power supply module.

[0134] The second control module is used to control the direction of current transmission between the DC charging module and the power supply module through the current control module when the temperature of the battery in the power supply module is detected to be greater than or equal to the first threshold, and to form a charging circuit between the DC charging module and the power supply module.

[0135] It is understood that the battery charging control device provided in this embodiment is used to execute the above-described battery charging control method, and therefore can at least achieve the beneficial effects that the above-described battery charging control method can achieve, which will not be elaborated here.

[0136] This application also provides an electronic device for performing the above-described battery charging control method. Please refer to... Figure 11 This illustrates a schematic diagram of an electronic device provided by some embodiments of this application. For example... Figure 11 As shown, the electronic device 8 includes: a processor 800, a memory 801, a bus 802 and a communication interface 803. The processor 800, the communication interface 803 and the memory 801 are connected through the bus 802. The memory 801 stores a computer program that can run on the processor 800. When the processor 800 runs the computer program, it executes the battery charging control method provided in any of the foregoing embodiments of this application.

[0137] The memory 801 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this device network element and at least one other network element is achieved through at least one communication interface 803 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0138] Bus 802 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. The memory 801 is used to store programs. After receiving execution instructions, the processor 800 executes the program. The battery charging control method disclosed in any of the aforementioned embodiments of this application can be applied to the processor 800, or implemented by the processor 800.

[0139] The processor 800 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 800 or by instructions in software form. The processor 800 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 801. Processor 800 reads the information in memory 801 and, in conjunction with its hardware, completes the steps of the above method.

[0140] The electronic device provided in this application embodiment and the battery charging control method provided in this application embodiment are based on the same inventive concept and have the same beneficial effects as the methods they adopt, operate or implement.

[0141] This application also provides a computer-readable storage medium corresponding to the battery charging control method provided in the foregoing embodiments. Please refer to... Figure 12 The computer-readable storage medium shown is an optical disc 30, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it executes the battery charging control method provided in any of the aforementioned embodiments.

[0142] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0143] The computer-readable storage medium provided in this application embodiment and the battery charging control method provided in this application embodiment are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application stored therein.

[0144] This application also provides a computer program product corresponding to the battery charging control method provided in the foregoing embodiments, including a computer program that is executed by a processor to implement the battery charging control method described above.

[0145] The computer program product provided in this application embodiment is based on the same inventive concept as the battery charging control method provided in this application embodiment, and has the same beneficial effects as the method implemented by the computer program being executed by a processor.

[0146] Those skilled in the art will understand that in the methods described above in specific embodiments, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined based on its function and possible internal logic. (Method Embodiments)

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A power battery system, characterized in that, The power supply module, the direct current charging module, the current control module and the load circuit, the direct current charging module is connected between the positive terminal and the negative terminal of the power supply module, and the load circuit is connected between the positive terminal and the negative terminal of the direct current charging module. The current control module is arranged between the direct current charging module and the power supply module, and is used for controlling the current transmission direction between the direct current charging module and the power supply module. The current control module comprises a first circuit and a second circuit in parallel, when the first circuit is turned on, a charging loop is formed between the direct current charging module and the power supply module. When the second circuit is turned on, the direct current charging module and the power supply module are unidirectionally conducted, and the current conduction direction is opposite to the current output direction of the direct current charging module. The first circuit comprises a first switch, the second circuit comprises a controllable device, and the controllable device comprises a diode and a second switch in series. When the temperature of the battery in the power supply module meets the charging requirement, the second switch is controlled to be turned off; when the temperature of the battery does not meet the charging requirement, the second switch is controlled to be turned on, and the first switch is controlled to be turned off, so that the current between the direct current charging module and the battery flows from the positive terminal of the battery to the positive terminal of the direct current charging module, and flows from the positive terminal of the direct current charging module to the positive terminal of the battery. The first switch is arranged between the same polarity terminals of the power supply module and the direct current charging module.

2. The power battery system of claim 1, wherein, The controllable device is arranged between the same polarity terminals of the power supply module and the direct current charging module, and controls the unidirectional conduction between the direct current charging module and the power supply module, and the current conduction direction is opposite to the current output direction of the direct current charging module.

3. The power battery system of claim 1, wherein, The positive terminal of the diode is connected to the positive terminal of the power supply module, and the negative terminal of the diode is connected to the positive terminal of the direct current charging module.

4. The power battery system of claim 3, wherein, The positive terminal of the diode is connected to the negative terminal of the direct current charging module, and the negative terminal of the diode is connected to the negative terminal of the power supply module.

5. The power battery system of claim 3, wherein, The load circuit comprises a battery heating module, the battery heating module is connected between the positive terminal and the negative terminal of the direct current charging module, and is arranged close to the battery in the power supply module, and is used for heating the battery.

6. The power battery system according to any one of claims 1-5, wherein, The load circuit further comprises a warm air system, and the warm air system is arranged between the positive terminal and the negative terminal of the direct current charging module.

7. The power battery system of any one of claims 1-5, wherein, The charging device and the power battery system of any one of claims 1-7 are included; the charging device is connected with the direct current charging module.

8. A battery charging system, characterized by, The method is applied to the power battery system of any one of claims 1-7, and the method comprises:

9. A battery charge control method characterized by, When it is detected that the temperature of the battery in the power supply module is less than a first threshold value, the current transmission direction between the direct current charging module and the power supply module is controlled by the current control module, and a charging loop is formed between the direct current charging module and the load circuit. ​ If the temperature of the battery in the power supply module is greater than or equal to the first threshold value, the current transmission direction between the DC charging module and the power supply module is controlled by the current control module, and a charging loop between the DC charging module and the power supply module is formed.

10. The method of claim 9, wherein, The current transmission direction between the DC charging module and the power supply module is controlled by the current control module, and a charging loop between the DC charging module and the power supply module is formed, including: The second circuit of the current control module is controlled to be turned on, and the first circuit is controlled to be turned off, so that the current transmission direction is opposite to the current output direction of the DC charging module; The circuit between the DC charging module and the load circuit is controlled to be turned on, and a charging loop between the DC charging module and the load power supply is formed.

11. The method of claim 9, wherein, The current transmission direction between the DC charging module and the power supply module is controlled by the current control module, and a charging loop between the DC charging module and the power supply module is formed, including: The first circuit of the current control module is controlled to be turned on, and the second circuit is controlled to be turned off, so that the current transmission direction is the same as the current transmission direction of the DC charging module; The circuit between the DC charging module and the power supply module is controlled to be turned on, and a charging loop between the DC charging module and the power supply module is formed.

12. The method of any one of claims 9-11, wherein, After the temperature of the battery is detected to be less than the first threshold value, the current transmission direction between the DC charging module and the power supply module is controlled by the current control module, and a charging loop between the DC charging module and the power supply module is formed, further including: If the temperature of the battery is less than or equal to a second threshold value, a heating loop is formed between the power supply module and the driving module of the power battery system; the second threshold value is less than the first threshold value; If the temperature of the battery is greater than or equal to a third threshold value, the heating loop is controlled to be turned off; the third threshold value is greater than the second threshold value and less than the first threshold value.

13. The method of claim 12, wherein, After the charging loop between the DC charging module and the power supply module is formed, further including: If the temperature of the battery is greater than or equal to the first threshold value, the circuit between the DC charging module and the load circuit is controlled to be turned off, and the circuit between the DC charging module, the current control module and the power supply module is controlled to be turned on.

14. A battery charge control device, characterized by comprising: The device is applied to the power battery system of any one of claims 1-7, and the device includes: A first control module is configured to detect that the temperature of the battery in the power supply module is less than a first threshold value, control the current transmission direction between the DC charging module and the power supply module by the current control module, and form a charging loop between the DC charging module and the power supply module. A first control module is configured to detect that the temperature of the battery in the power supply module is less than a first threshold value, control the current transmission direction between the DC charging module and the power supply module by the current control module, and form a charging loop between the DC charging module and the power supply module. A second control module is configured to control, by the current control module, a direction of current transmission between the DC charging module and the power supply module and form a charging loop between the DC charging module and the power supply module when it is detected that the temperature of the battery in the power supply module is greater than or equal to the first threshold value.

15. An electrical device, characterized by A power battery system according to any one of claims 1-7.

16. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, The processor executes the computer program to implement the method according to any one of claims 9-13.

17. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the method according to any one of claims 9-13.

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