Charging system

Abstract

The utility model provides a charging system, and belongs to the technical field of batteries. The charging system comprises a battery management module, a first power supply module, a second power supply module and a voltage transformation module. The first power supply module is used for supplying power to the battery management module, and the battery management module is used for being awakened in response to an awakening signal and detecting a first voltage of the first power supply module; the voltage transformation module is connected with the battery management module, the input end of the voltage transformation module is connected with the second power supply module, and the output end of the voltage transformation module is connected with the first power supply module; and the control transformation module transforms the voltage output by the second power supply module and outputs the transformed voltage to the first power supply module. The charging system provided by the embodiment of the utility model can improve the charging reliability of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a charging system. Background Art

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, playing a crucial role in promoting energy transformation and sustainable development. Battery technology is a crucial factor in the development of the new energy industry.

[0003] The battery management module (BMM) manages and monitors the battery's status and controls its charge and discharge. Once awakened, the BMM activates related circuits and functions from a low-power sleep state, returning them to normal operation and beginning to charge the battery. However, there is currently a problem in which the BMM may not effectively control battery charging after awakening, impacting battery charging reliability. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background art. To this end, one purpose of the present application is to provide a charging system to improve the problem that the battery management module may not be able to effectively control the battery charging after being awakened, thereby affecting the reliability of the battery charging.

[0005] An embodiment of the first aspect of the present application provides a charging system, comprising: a battery management module, a first power module, a second power module, and a transformer module. The first power module is configured to supply power to the battery management module, wherein the battery management module is configured to be awakened in response to a wake-up signal and detect a first voltage of the first power module; the transformer module is connected to the battery management module, with an input end of the transformer module connected to the second power module and an output end of the transformer module connected to the first power module. The battery management module is further configured to control the transformer module to transform the voltage output by the second power module and output the voltage to the first power module in response to the first voltage being less than or equal to a first threshold.

[0006] In the technical solution of the embodiment of the present application, when the first voltage of the first power module is less than or equal to the first threshold, it indicates that the first power module is undervoltage and may not be able to provide sufficient power to the battery management module, thereby causing the battery management module to fail to work normally after being awakened. The input end of the transformer module is used to connect to the second power module, and the output end is used to connect to the first power module. When the first voltage of the first power module is less than or equal to the first threshold, the first power module is isolated and powered. In this way, on the one hand, the transformer module can adjust the voltage output by the second power module so that the adjusted voltage is suitable for charging the first power module, thereby improving the reliability of charging the first power module. On the other hand, the transformer module can realize isolated power supply to the first power module, thereby electrically isolating the second power module from the first power module, reducing the instantaneous surge when the second power module supplies power to the first power module, and improving the safety of charging the first power module. After the power of the first power module is increased, the battery management module can work normally after being awakened, and can then normally control the battery to enter the charging process, thereby improving the reliability of battery charging.

[0007] In some embodiments, the voltage conversion module includes: an inverter, a transformer, and a rectifier bridge. The input end of the inverter is used to connect to the second power module to convert the direct current output by the second power module into alternating current. The input end of the transformer is connected to the output end of the inverter to transform the alternating current output by the inverter. The input end of the rectifier bridge is connected to the output end of the transformer. The output end of the rectifier bridge is used to connect to the first power module. The rectifier bridge is used to convert the current output by the transformer into direct current and output it to the first power module. Since the primary winding and secondary winding of the transformer transfer energy through electromagnetic induction and there is no direct electrical connection, the primary winding of the transformer is electrically connected to the second power module, and the secondary winding is electrically connected to the first power module, thereby eliminating a direct electrical connection between the second power module and the first power module. Therefore, power supply isolation can be achieved when the second power module supplies power to the first power module.

[0008] In some embodiments, the voltage transformation module further includes a first switching element connected between the output end of the rectifier bridge and the first power module. The battery management module is configured to control the first switching element to close in response to the first voltage being less than or equal to a first threshold. Thus, the first switching element can be used to connect and disconnect the inverter, transformer, and rectifier bridge as a whole from the first power module, thereby enabling automatic control of the power supply to the first power module and simplifying the control method for the power supply to the first power module.

[0009] In some embodiments, the charging system further includes a wake-up module, wherein the wake-up module has an input connected to the second power module and an output connected to the battery management module. The wake-up module is configured to receive a voltage signal output by the second power module when the battery management module is in a dormant state and output a wake-up signal to the battery management module in response to the voltage signal. Thus, the wake-up module and the voltage conversion module can be connected to the same second power module to wake up the battery management module and provide isolated power to the second power module, simplifying the circuit connection.

[0010] In some embodiments, the wake-up module includes an input unit and an output unit. The input unit is connected to the second power module and is configured to receive a voltage signal output by the second power module and output a trigger signal based on the voltage signal. The output unit is configured to receive the trigger signal and output a wake-up signal to the battery management module based on the trigger signal to wake up the battery management module. The input unit and the output unit are electrically isolated to achieve isolated wake-up of the battery management module.

[0011] In some embodiments, the charging system further includes a switch unit connected between the input unit and the second power module, the switch unit being configured to close in response to a voltage signal to connect the input unit to the second power module. By configuring the switch unit, the battery management module is disconnected from the second power module when in a dormant state. This prevents the battery management module from generating static current during dormant state, thereby reducing battery self-discharge. Furthermore, disconnecting the battery management module from the second power module during dormant state can reduce the risk of short circuits, overheating, and other issues caused by circuit failures in the battery management module.

[0012] In some embodiments, the input unit includes a light-emitting diode (LED), and the output unit includes a light receiver. Light is used to transmit signals between the LED and the light receiver, thereby achieving electrical isolation between the second power module and the battery management module, thereby protecting the battery management module from electrical noise and surges to a certain extent.

[0013] In some embodiments, when the voltage conversion module includes an inverter, a transformer, a rectifier bridge, and a first switching element, a light-emitting diode is connected in series with the inverter. The light-emitting diode and the inverter are connected in series to the positive and negative electrodes of the second power module. Connecting the light-emitting diode and the inverter in series can simplify circuit wiring, save costs, and reduce circuit size.

[0014] In some embodiments, the charging system further includes a switch unit connected between the input unit and the second power module. The switch unit is configured to close in response to a voltage signal. The switch unit includes a second switch element configured to connect between the positive electrode of the second power module and the positive electrode of the light-emitting diode; and a third switch element configured to connect between the negative electrode of the second power module and the negative electrode of the inverter. The second and third switch elements are configured to respectively control the connection between the series-connected light-emitting diode and the inverter and the positive and negative electrodes of the second power module. In this way, in the event of a fault, the connection between the second power module and the transformer module and the wake-up module can be completely severed, thereby improving safety.

[0015] In some embodiments, the negative terminals of both the first power module and the second power module are grounded, and the negative terminal of the second power module is connected to a reference ground different from the reference ground of the negative terminal of the first power module. This allows the ground potentials of the input and output sides of the transformer module to be independent of each other, thereby better achieving electrical isolation between the first power module and the second power module.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0018] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0019] Figure 2 This is one of the functional block diagrams of the charging system in some embodiments of the present application;

[0020] Figure 3 This is one of the structural diagrams of the charging system in some embodiments of the present application;

[0021] Figure 4 This is a second structural diagram of a charging system according to some embodiments of the present application;

[0022] Figure 5 This is the second functional block diagram of the charging system in some embodiments of the present application;

[0023] Figure 6 This is the third functional block diagram of the charging system in some embodiments of the present application;

[0024] Figure 7 This is the fourth functional block diagram of the charging system in some embodiments of the present application;

[0025] Figure 8 This is the third structural diagram of the charging system of some embodiments of the present application.

[0026] Description of reference numerals:

[0027] Vehicle 1000 , input unit 1011 , output unit 1012 , inverter 1041 , transformer 1042 , rectifier bridge 1043 , first switching element 1044 , second switching element 1061 , third switching element 1062 ;

[0028] Battery 100, battery management module 101, first power module 102, second power module 103, voltage conversion module 104, wake-up module 105, switch unit 106, off-board charger controller 107;

[0029] Controller 200;

[0030] Motor 300. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is two or more than two, unless otherwise specifically defined.

[0034] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0036] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0037] In the description of the embodiments of this application, unless otherwise specified or limited, the technical term "connection" refers to electrical connection; it can be direct connection or indirect connection through an intermediate medium. 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.

[0038] Currently, market developments indicate that rechargeable batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in various electronic devices, including electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, market demand is also growing.

[0039] During operation, the battery management module (BMM) needs to monitor battery voltage, current, temperature, and other parameters in real time. It also performs data processing, communication, and controls charging and discharging processes. All of these functions require power from a power supply. If the power supply for the BMM is depleted after waking up, the BMM may malfunction or become unstable. This can lead to the BMM being unable to control battery charging after waking up, compromising battery reliability.

[0040] Based on the above considerations, a charging system is designed, comprising: a battery management module, a first power module, a second power module, and a voltage transformer module. The first power module is configured to supply power to the battery management module. The battery management module is configured to be awakened in response to a wake-up signal and detect a first voltage of the first power module. The voltage transformer module is connected to the battery management module, with its input connected to the second power module and its output connected to the first power module. The battery management module is further configured to control the voltage transformer module to transform the voltage output from the second power module and output it to the first power module in response to the first voltage being less than or equal to a first threshold. This allows the voltage transformer module to regulate the voltage output from the second power module to ensure that the regulated voltage is suitable for charging the first power module, thereby improving the reliability of charging the first power module. Furthermore, the voltage transformer module provides isolated power supply to the first power module, thereby electrically isolating the first power module from the second power module, reducing transient surges when the second power module supplies power to the first power module, and improving the safety of charging the first power module. After the power of the first power module is increased, the awakened battery management module can work normally, and then can normally control the battery to enter the charging process, thereby improving the battery charging reliability.

[0041] The charging system disclosed in the embodiments of the present application can be used, but is not limited to, to charge batteries, and the batteries can be used, but are not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft.

[0042] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0043] An embodiment of the present application also provides an energy storage device that uses a battery as a power source. The energy storage device may be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0044] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0045] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of the vehicle provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 can also include a vehicle controller 200 and a motor 300. The vehicle controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0046] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000. Types of the battery 100 include, but are not limited to, lithium-ion batteries, nickel-metal hydride batteries, and the like.

[0047] refer to Figure 2 An embodiment of the present application provides a charging system, comprising: a battery management module 101, a first power module 102, a second power module 103, and a transformer module 104. The first power module 102 is used to supply power to the battery management module 101, wherein the battery management module 101 is awakened in response to a wake-up signal and detects a first voltage of the first power module 102; the transformer module 104 is connected to the battery management module 101, with an input end of the transformer module 104 connected to the second power module 103, and an output end of the transformer module 104 connected to the first power module 102. The battery management module 101 is further used to control the transformer module 104 to transform the voltage output by the second power module 103 and output the voltage to the first power module 102 in response to the first voltage being less than or equal to a first threshold.

[0048] The battery management module 101 is used to manage and monitor the status of the battery. The battery management module may be a BMS (Battery Management System).

[0049] The voltage of the first power module 102 can be, for example, 11V to 15V. For example, the first power module 102 can include, but is not limited to, a low-voltage battery, which can include, but is not limited to, a lead-acid battery. If the vehicle is powered by a battery, the first power module 102 can be a low-voltage battery in the vehicle. In other embodiments, the first power module 102 can also be another structure capable of providing power. The first power module 102 can be located in the vehicle or in a charging device.

[0050] After waking up the battery management module 101, the battery management module 101 can detect the voltage of the first power module 102 to determine whether the voltage of the first power module 102 is less than or equal to the first threshold value. If the voltage of the first power module 102 is greater than the first threshold value, the battery management module 101 controls the battery charging. If the voltage of the first power module 102 is less than or equal to the first threshold value, the transformer module 104 transforms the voltage output by the second power module 103 and outputs it to the first power module to power the first power module 102, so that the power of the first power module 102 is increased, and thus sufficient power support can be provided to the battery management module 101, so that the battery management module 101 can control the battery charging. The battery management module 101 may include a battery sensor, which can detect the voltage of the second power module 103, convert the voltage value into an electrical signal, and then transmit it to the battery management unit (BMU) in the battery management module 101. The BMU's ADC (Analog-to-Digital Converter) can obtain the actual voltage of the second power module 103 by processing and analyzing the electrical signal.

[0051] The voltage conversion module 104 can be communicatively connected to the battery management module 101, so that when the battery management module 101 detects that the voltage of the first power module 102 is less than or equal to a first threshold, it controls the voltage conversion module 104 to receive the voltage output by the second power module 103 and convert it into a voltage suitable for charging the first power module 102, thereby supplying power to the first power module 102. The first power module 102 can be a low-voltage auxiliary power supply in a charging device, or it can be another structure capable of providing power. The low-voltage auxiliary power supply in a charging device has the same meaning as commonly understood by those skilled in the art and will not be further described here. The low-voltage auxiliary power supply typically outputs a 12V voltage. The first threshold can be used to represent the minimum voltage when the first power module 102 is undervoltage. The first threshold can be calculated based on multiple undervoltage detections of the first power module 102 and the minimum battery voltage during undervoltage conditions. For example, if the first power module is a low-voltage battery, the first threshold can be 9V. It can be understood that when the voltage of the first power module 102 is greater than the first threshold, the voltage output by the first power module 102 is sufficient to support the operation of the battery management module, and there is no need for the transformer module 104 to transform the voltage output by the second power module 103 and output it to the first power module 102.

[0052] The transformer module 104 can implement isolated power supply from the second power module 103 to the first power module 102. Isolated power supply means that the transformer module 104 electrically isolates the second power module 103 from the first power module 102, thereby reducing surges generated when the second power module 103 supplies power to the first power module 102.

[0053] In some embodiments, the voltage transformation module 104 may include but is not limited to a flyback converter, a push-pull transformer driver, an LLC converter, an isolated DC-DC (Direct Current-Direct Current) power supply module, or an isolation transformer, etc., which can achieve isolated power supply.

[0054] When the charging system is used to charge the battery of an electrical device, the transformer module 104 can be set in the electrical device, for example, in a vehicle; the transformer module 104 can also be set in the charging device, for example, in a charging pile.

[0055] In some embodiments, the first power module, the second power module, and the transformer module may all be disposed in the charging device, and the battery management module may be disposed in the vehicle.

[0056] In other embodiments, the first power module, the second power module, the voltage transformation module and the battery management module may all be disposed in the vehicle.

[0057] In some other embodiments, the second power module and the voltage transformation module may be disposed in the charging device, and the first power module and the battery management module may be disposed in the vehicle.

[0058] In the above technical solution, the input end of the transformer module 104 is used to connect to the second power module 103, and the output end is used to connect to the first power module 102. When the voltage of the first power module 102 is less than or equal to the first threshold, the transformer module 104 provides isolated power to the first power module 102. In this way, on the one hand, the transformer module 104 can adjust the voltage output by the second power module 103 so that the adjusted voltage is suitable for charging the first power module 102, thereby improving the reliability of charging the first power module 102. On the other hand, the transformer module 104 can achieve isolated power supply to the first power module 102, thereby electrically isolating the second power module 103 from the first power module 102, reducing the instantaneous surge when the second power module 103 supplies power to the first power module 102, and improving the safety of charging the first power module 102. After the power of the first power module 102 is increased, the awakened battery management module 101 can operate normally, and can then properly control the battery to enter the charging process, thereby improving battery charging reliability.

[0059] In addition, since the transformer module 104 supplies power to the first power module 102, the power of the first power module 102 is increased, which can to a certain extent avoid the problem that the vehicle cannot start or drive normally after charging is completed due to the first power module 102 being out of power.

[0060] refer to Figure 3 According to some embodiments of the present application, the transformer module 104 includes: an inverter 1041, a transformer 1042 and a rectifier bridge 1043. The input end of the inverter 1041 is used to connect to the second power module 103 to convert the direct current output by the second power module 103 into alternating current. The input end of the transformer 1042 is connected to the output end of the inverter 1041 to transform the alternating current output by the inverter 1041. The input end of the rectifier bridge 1043 is connected to the output end of the transformer 1042. The output end of the rectifier bridge 1043 is used to connect to the first power module 102. The rectifier bridge 1043 is used to convert the current output by the transformer 1042 into direct current and output it to the first power module 102.

[0061] Transformer 1042 is a device that uses the principle of electromagnetic induction to change AC voltage. Transformer 1042 includes a primary coil, a secondary coil, and an iron core. When AC power is applied to the primary coil, the AC power generates an alternating magnetic field in the iron core. This alternating magnetic field passes through the secondary coil. According to the law of electromagnetic induction, an electromotive force is induced in the secondary coil, generating a current in the circuit where the secondary coil is located, thus achieving the transfer of electrical energy. When the number of turns of the primary and secondary coils is different, the input AC power can be converted into AC power of different magnitudes and output. Because there is no direct electrical connection between the primary and secondary coils, energy is transferred through the magnetic field, thus achieving power supply isolation.

[0062] Because the primary coil of the transformer 1042 is connected to AC power, when the second power module 103 outputs DC power, the DC power output by the second power module 103 must first be converted to AC power by the inverter 1041 before being output to the transformer 1042. The AC power output by the transformer 1042 is then converted back to DC power by the rectifier bridge 1043, and this DC power is output to the first power module 102 for charging.

[0063] The input end of the inverter 1041 may include a positive electrode and a negative electrode. The positive electrode of the input end of the inverter 1041 may be electrically connected to the positive electrode of the second power module 103, and the negative electrode of the input end may be electrically connected to the negative electrode of the second power module 103, so that the input end of the inverter 1041 can receive the direct current (DC) power output by the second power module 103. After receiving the DC power, the inverter 1041 converts the DC power into alternating current (AC) power and outputs it from the output end of the inverter 1041. The manner in which the output end of the inverter 1041 is connected to the input end of the transformer 1042 is conventionally known to those skilled in the art and will not be further described here.

[0064] Typically, four diodes are included. Utilizing the unidirectional conductivity of the diodes, they direct current in specific directions during the positive and negative half-cycles of the AC voltage, thereby converting alternating positive and negative AC power into unidirectional DC power. The connection between the input end of the rectifier bridge 1043 and the output end of the transformer 1042 is conventionally known to those skilled in the art and will not be further described here.

[0065] In the above technical solution, the inverter 1041 can convert direct current (DC) power into alternating current (AC) power, enabling the transformer 1042 to transform the AC power. The rectifier bridge 1043 then converts the transformed AC power into the DC power required by the first power module 102. Since energy is transferred between the primary and secondary windings of the transformer 1042 via electromagnetic induction, there is no direct electrical connection. The primary winding of the transformer 1042 is electrically connected to the second power module 103, and the secondary winding is electrically connected to the first power module 102. Consequently, there is no direct electrical connection between the second power module 103 and the first power module 102. Therefore, power supply isolation can be achieved when the second power module 103 supplies power to the first power module 102.

[0066] refer to Figure 4 According to some embodiments of the present application, the transformer module 104 also includes: a first switching element 1044, the first switching element 1044 is connected between the output end of the rectifier bridge 1043 and the first power supply module 102, and the battery management module is used to control the first switching element 1044 to close in response to the first voltage being less than or equal to the first threshold.

[0067] The positive electrode of the output end of the rectifier bridge 1043 is connected to the positive electrode of the first power module 102, and the negative electrode of the output end of the rectifier bridge 1043 is connected to the negative electrode of the first power module 102. The first switching element 1044 can be connected between the positive electrode of the output end of the rectifier bridge 1043 and the positive electrode of the first power module 102, or between the negative electrode of the output end of the rectifier bridge 1043 and the negative electrode of the first power module 102. When the first switching element 1044 is connected between the positive electrode of the output end of the rectifier bridge 1043 and the positive electrode of the first power module 102, the negative electrode of the output end of the rectifier bridge 1043 is directly connected to the negative electrode of the first power module 102. When the first switching element 1044 is connected between the negative electrode of the output end of the rectifier bridge 1043 and the negative electrode of the first power module 102, the positive electrode of the output end of the rectifier bridge 1043 is directly connected to the positive electrode of the first power module 102. The first switching element 1044 includes, but is not limited to, a switching element such as a relay.

[0068] In some embodiments, the battery management module is a BMS, and the first switch element 1044 is connected to the battery management unit (BMU) within the BMS. The BMU obtains the voltage of the first power module 102 and determines whether the voltage of the first power module 102 is less than or equal to a first threshold. If the voltage of the first power module 102 is less than or equal to the first threshold, the BMU controls the first switch element 1044 to close. It will be understood that when the input of the inverter 1041 is connected to the second power module 103, the inverter 1041, the transformer 1042, and the rectifier bridge 1043 remain connected. Therefore, when the first switch element 1044 is closed, the rectifier bridge 1043 is connected to the first power module 102, enabling the rectifier bridge 1043 to input the transformed DC power into the first power module 102. When the BMU determines that the voltage of the first power module 102 is greater than the first threshold, the BMU controls the first switch element 1044 to be disconnected, thereby disconnecting the rectifier bridge 1043 from the first power module 102. The current output by the second power module 103 cannot be input into the first power module 102, thereby disconnecting the power supply to the first power module 102.

[0069] In the above technical solution, through the first switching element 1044, the inverter 1041, the transformer 1042 and the rectifier bridge 1043 as a whole and the first power supply module 102 can be turned on and off, thereby realizing automatic control of the power supply to the first power supply module 102, which is conducive to simplifying the control method of the power supply to the first power supply module 102.

[0070] refer to Figure 5According to some embodiments of the present application, the charging system further includes: a wake-up module 105, an input end of the wake-up module 105 is connected to the second power module 103, and an output end of the wake-up module 105 is connected to the battery management module 101. The wake-up module 105 is configured to: when the battery management module 101 is in a sleep state, receive a voltage signal output by the second power module 103, and output a wake-up signal to the battery management module 101 in response to the voltage signal.

[0071] The wake-up module 105 can send a wake-up signal to the battery management module 101 when the charging device is ready to charge the battery. After the battery management module 101 is awakened, it controls the battery charging connection to the charging device so that the charging device charges the battery. The wake-up module can be set in the charging device or in the vehicle. The second power supply module can be a low-voltage auxiliary power supply in the charging device, and the voltage signal can be a low-voltage signal output by the low-voltage auxiliary power supply. When the charging device is ready to charge the battery, the low-voltage auxiliary power supply will output a voltage signal. The wake-up module 105 can send a wake-up signal in response to the voltage signal, thereby waking up the battery management module 101. The charging device may include but is not limited to a charging pile, a charger, etc.

[0072] In some embodiments, the wake-up module 105 may include, but is not limited to, devices such as a voltage comparator, a microcontroller, a Hall effect sensor, and an optocoupler. For example, when the wake-up module 105 includes a voltage comparator, the voltage comparator can receive a voltage signal and compare the voltage signal with a preset reference voltage. When the voltage signal exceeds the reference voltage, a wake-up signal is output, thereby waking up the battery management module 101. When the wake-up module 105 includes a microcontroller, the microcontroller can detect changes in the voltage or current of the charging device and, based on the voltage signal, send a wake-up signal. When the wake-up module 105 includes a Hall effect sensor, the Hall effect sensor can detect the magnetic field generated by the voltage signal to determine whether to start charging. When a change in the magnetic field is detected, a wake-up signal is output, thereby waking up the battery management module 101. When the wake-up module 105 includes an optocoupler, the input side of the optocoupler can convert the voltage signal into an optical signal, and then convert it into an electrical signal on the output side to output as a wake-up signal, thereby waking up the battery management module 101.

[0073] The low-voltage auxiliary power supply can be connected to a low-voltage charging port of the charging device.

[0074] refer to Figure 8In some embodiments, the voltage conversion module and the wake-up module can be set in the charging device, and the input end of the wake-up module 105 can be directly connected to the low-voltage auxiliary power supply, and the battery management module 101 can be connected to the A+ and A- of the low-voltage charging port. A+ and A- can be used as wake-up sources, and the battery management module 101 is connected to the output end of the wake-up module 105 through A+ and A-.

[0075] In other embodiments, the voltage conversion module and the wake-up module can also be set in the battery device, and the input end of the wake-up module 105 can be connected to A+ and A- of the low-voltage charging port, and the battery management module 101 is directly connected to the output end of the wake-up module 105.

[0076] When the charging device prepares to charge the battery, the low-voltage auxiliary power supply outputs a low-voltage signal, powering on the low-voltage auxiliary power supply. Upon receiving the low-voltage signal, the wake-up module 105 awakens the dormant battery management module 101. At this point, the battery management module controls the first switch element 1044 to open, disconnecting the voltage transformer module 104 from the first power module 102. After waking up, the battery management module 101 detects whether the voltage of the first power module 102 is less than or equal to a first threshold. If so, the battery management module controls the first switch element 1044 to close, thereby connecting the low-voltage auxiliary power supply and the first power module 102 through the voltage transformer module 104. This isolates the power supply from the voltage transformer module 104 to the first power module 102. If the battery management module 101 detects that the voltage of the first power module 102 is less than or equal to the first threshold, it maintains the first switch element 1044 open and controls the connection of the battery to the charging device, allowing the charging device to officially charge the battery.

[0077] In the above technical solution, the awakening module 105 and the voltage conversion module 104 can be connected to the same second power module 103 to realize the awakening of the battery management module 101 and realize the isolated power supply to the first power module 102, thereby simplifying the circuit connection method.

[0078] refer to Figure 6 According to some embodiments of the present application, the wake-up module 105 includes: an input unit 1011 and an output unit 1012, the input unit 1011 is connected to the second power supply module 103, the input unit 1011 is configured to receive a voltage signal output by the second power supply module 103, and output a trigger signal based on the voltage signal, the output unit 1012 is configured to receive the trigger signal and output a wake-up signal to the battery management module 101 based on the trigger signal to wake up the battery management module 101.

[0079] The voltage signal output by the second power module 103 can be a low voltage. The input unit 1011 is connected to the second power module 103, and the second power module 103 outputs a low voltage to the input unit 1011. When the low voltage is applied to the input unit 1011, a trigger signal is generated. The trigger signal can be a signal different from a voltage signal, such as a light signal or a magnetic signal lamp. The output unit 1012 can sense the trigger signal and generate a wake-up signal based on the trigger signal. The wake-up signal can be an electrical signal that can be output to the battery management module 101.

[0080] In the above technical solution, the input unit 1011 and the output unit 1012 are electrically isolated to achieve isolated wake-up of the battery management module 101 .

[0081] refer to Figure 7 According to some embodiments of the present application, the charging system further includes: a switch unit 106, connected between the input unit 1011 and the first power module 102, and the switch unit 106 is configured to close in response to a voltage signal output by the second power module 103, so that the input unit 1011 is connected to the second power module 103.

[0082] The switch unit 106 is disconnected when the second power module 103 does not output a voltage signal, so that the battery management module 101 is disconnected from the second power module 103 when in the sleep state.

[0083] In some embodiments, when the second power module 103 is a low-voltage auxiliary power source for the charging device, the off-board charger controller within the charging device can control the on / off switching of the switch unit 106. After confirming that the charging device's charging plug is fully connected to the vehicle's charging port, the off-board charger controller can control the switch unit 106 to close, causing the low-voltage auxiliary power source to output a low-voltage signal to the wake-up module 105, thereby causing the wake-up module 105 to wake up the battery management module 101. After being awakened, the battery management module 101 controls the connection of the vehicle's battery to the charging device, enabling the charging device to charge the battery.

[0084] In the above technical solution, by providing a switch unit 106, the battery management module 101 is disconnected from the second power module 103 when in a dormant state. This prevents static current from being generated by the battery management module 101 in the dormant state, thereby reducing battery self-discharge. Furthermore, disconnecting the second power module 103 during the dormant state reduces the risk of short circuits, overheating, and other issues caused by circuit failures in the battery management module 101.

[0085] refer to Figure 8 According to some embodiments of the present application, the input unit 1011 includes a light emitting diode, and the output unit 1012 includes a light receiver.

[0086] For example, when the second power supply module 103 is a low-voltage auxiliary power supply for the charging device, the positive pole of the light-emitting diode can be connected to the positive pole of the low-voltage auxiliary power supply, the negative pole of the light-emitting diode can be connected to the negative pole of the low-voltage auxiliary power supply, and the optical receiver can be connected to the input end of the wake-up circuit in the battery management module 101.

[0087] The voltage signal output by the second power supply module 103 flows through the light-emitting diode, causing the light-emitting diode to generate a light signal. The light signal serves as a trigger signal. The optical receiver receives the light signal generated by the light-emitting diode and converts the light signal into an electrical signal. The electrical signal is output as a wake-up signal to the wake-up circuit in the battery management module 101 to wake up the battery management module 101.

[0088] Light-emitting diodes (LEDs) may include, but are not limited to, conventional LEDs and infrared LEDs. Conventional LEDs typically emit light in the visible light range, while infrared LEDs emit light in the form of infrared photons. Accordingly, light receivers may include those suitable for conventional LEDs and those suitable for infrared LEDs.

[0089] In the above technical solution, the light-emitting diode and the light receiver transmit signals by means of light, thereby achieving electrical isolation between the second power module 103 and the battery management module 101, and to a certain extent preventing the battery management module 101 from being affected by electrical noise and surges.

[0090] Continue to refer Figure 8 According to some embodiments of the present application, when the transformation module 104 includes an inverter 1041, a transformer 1042, a rectifier bridge 1043 and a first switching element 1044, the light-emitting diode is connected in series with the inverter 1041, and the light-emitting diode and the inverter 1041 are used to be connected between the positive and negative poles of the second power module 103 after being connected in series.

[0091] For example, when the second power module 103 is a low-voltage auxiliary power supply for the charging device, the positive pole of the light-emitting diode can be connected to the positive pole of the low-voltage auxiliary power supply, the negative pole of the light-emitting diode can be connected to the positive pole of the input end of the inverter 1041, and the negative pole of the input end of the inverter 1041 can be connected to the negative pole of the low-voltage auxiliary power supply.

[0092] Before waking up the battery management module 101, the first switch element 1044 is in the off state. The low-voltage auxiliary power supply outputs a low-voltage signal, causing current to flow through the light-emitting diode and inverter 1041. The light-emitting diode generates a light signal, which is received by the optical receiver and converted into an electrical signal. The electrical signal is then output as the wake-up signal to the battery management module 101, thereby waking up the battery management module 101. The input of the inverter 1041 receives the direct current (DC) output from the low-voltage auxiliary power supply and converts it into alternating current (AC) that is output to the transformer 1042. The transformer 1042 transforms the AC power and outputs the transformed AC power to the rectifier bridge 1043. Because the first switch element 1044 is off, the rectifier bridge 1043 is disconnected from the first power module 102. During the battery management module 101 wake-up period, the rectifier bridge 1043 does not supply power to the first power module 102.

[0093] After waking up, the battery management module 101 detects whether the voltage of the first power module 102 is less than or equal to a first threshold. If the voltage of the first power module 102 is less than or equal to the first threshold, the battery management module 101 controls the first switch element 1044 to close, so that the rectifier bridge 1043 outputs current to the first power module 102, thereby enabling power to be supplied to the first power module 102. If the voltage of the first power module 102 is greater than the first threshold, the battery management module 101 controls the first switch element 1044 to remain open and controls the connection of the battery to the charging device, so that the battery starts charging.

[0094] In the above technical solution, the light emitting diode is connected in series with the inverter 1041, which can simplify the circuit line, save costs, and reduce the circuit volume.

[0095] Continue to refer Figure 8 According to some embodiments of the present application, the charging system further includes a switch unit 106, which is connected between the input unit 1011 and the second power module 103. The switch unit 106 is configured to close in response to a voltage signal output by the second power module 103. The switch unit 106 includes: a second switch element 1061, configured to be connected between the positive electrode of the second power module 103 and the positive electrode of the light-emitting diode; and a third switch element 1062, configured to be connected between the negative electrode of the second power module 103 and the negative electrode of the inverter 1041.

[0096] In the case where the second power module 103 is a low-voltage auxiliary power supply of the charging device, the on-off switching of the switch unit 106 can be controlled by the off-board charger controller 107 in the charging device.

[0097] Exemplarily, when the battery management unit is in a dormant state, the off-board charger controller 107 controls the second and third switches 1061 and 1062 to be open. After confirming that the charging device's charging plug is fully connected to the vehicle's charging port, the off-board charger controller 107 controls the second and third switches 1061 and 1062 to be closed, thereby connecting the LED and inverter 1041 in series between the positive and negative electrodes of the low-voltage auxiliary power supply. The low-voltage auxiliary power supply outputs a low-voltage signal and wakes up the battery management module 101 via the LED and optical receiver. After the battery management module 101 wakes up, the second and third switches 1061 and 1062 remain closed. The battery management module 101 detects whether the voltage of the first power module 102 is less than or equal to a first threshold. If so, the battery management module 101 controls the first switch 1044 to be closed, causing the rectifier bridge 1043 to output current to the first power module 102, thereby providing power to the first power module 102.

[0098] The second switching element 1061 and the third switching element 1062 may include, but are not limited to, switching elements such as relays.

[0099] In the above technical solution, a second switching element 1061 and a third switching element 1062 are provided to respectively control the on-off between the series-connected light-emitting diode and the inverter 1041 and the positive and negative poles of the second power supply module 103. In this way, when a fault occurs, the connection between the second power supply module 103 and the transformer module and the wake-up module can be completely cut off, thereby improving safety.

[0100] According to some embodiments of the present application, the negative poles of the first power module and the second power module 103 are both grounded, and the reference ground to which the negative pole of the second power module 103 is connected is different from the reference ground to which the negative pole of the first power module 102 is connected.

[0101] Because the output of transformer module 104 is connected to first power module 102 and the input is connected to second power module, the input and output sides of transformer module 104 are not commonly grounded. For example, the negative electrode of first power module 102 is connected to the negative electrode of the output of rectifier bridge 1043, and the negative electrode of second power module 103 is connected to the negative electrode of the input of inverter 1041. The input side of transformer 1042 is connected to inverter 1041, and the output side is connected to rectifier bridge 1043. If the negative electrodes of first power module 102 and second power module 103 are connected to different reference grounds, this is equivalent to connecting the input side of transformer 1042 and the output side of transformer 1042 to different reference grounds. This ensures that the ground potentials on both sides of transformer 1042 are independent of each other, avoiding current leakage and electromagnetic interference issues caused by potential ground potential differences in the grounding system.

[0102] The second power module may be a low-voltage auxiliary power supply in the charging pile, and the first power module may be a low-voltage battery in the vehicle.

[0103] In the above technical solution, the ground potentials of the input side and the output side of the transformer module 104 are independent of each other, which can better achieve electrical isolation between the first power module 102 and the second power module 103 .

[0104] An embodiment of the present application provides a charging system, including: a battery management module 101 , a first power module 102 , a second power module 103 , a voltage transformation module 104 and a wake-up module 105 . The first power module 102 is used to supply power to the battery management module 101, wherein the battery management module 101 is used to be awakened in response to a wake-up signal and detect the first voltage of the first power module 102; the transformer module 104 is connected to the battery management module 101, the input end of the transformer module 104 is connected to the second power module 103, and the output end of the transformer module 104 is connected to the first power module 102. The battery management module 101 is also used to control the transformer module 104 to transform the voltage output by the second power module 103 and output it to the first power module 102 in response to the first voltage being less than or equal to the first threshold; the input end of the wake-up module 105 is used to connect to the second power module 103, and the output end of the wake-up module 105 is used to connect to the battery management module 101. The wake-up module 105 is configured to: when the battery management module 101 is in a sleep state, receive the voltage signal output by the second power module 103, and output a wake-up signal to the battery management module in response to the voltage signal to wake up the battery management module 101. The second power module can be a low-voltage auxiliary power supply in the charging pile, and the first power module can be a low-voltage battery in the vehicle. The battery management module is a BMS.

[0105] The voltage conversion module 104 includes an inverter 1041, a transformer 1042, a rectifier bridge 1043, and a first switching element 1044. The input of the inverter 1041 is connected to the second power module 103 to convert the DC power outputted by the second power module 103 into AC power. The input of the transformer 1042 is connected to the output of the inverter 1041 to transform the AC power outputted by the inverter 1041. The input of the rectifier bridge 1043 is connected to the output of the transformer 1042. The output of the rectifier bridge 1043 is connected to the first power module 102. The rectifier bridge 1043 is configured to convert the current outputted by the transformer 1042 into DC power and output it to the first power module 102. The first switching element 1044 is configured to be connected between the output of the rectifier bridge 1043 and the first power module 102. The battery management module is configured to control the first switching element 1044 to close upon detecting that the voltage of the first power module 102 is less than or equal to a first threshold.

[0106] The second power supply module 103 can be a low-voltage auxiliary power supply for the charging device, and the voltage signal can be a low-voltage signal output by the low-voltage auxiliary power supply. The wake-up module 105 includes a light-emitting diode (LED) and a light receiver. The LED is connected in series with the inverter 1041. The positive electrode of the LED can be connected to the positive electrode of the low-voltage auxiliary power supply, the negative electrode of the LED can be connected to the positive electrode of the input terminal of the inverter 1041, and the negative electrode of the input terminal of the inverter 1041 can be connected to the negative electrode of the low-voltage auxiliary power supply. The wake-up module 105 also includes a switch unit 106 for connecting between the input unit 1011 and the low-voltage auxiliary power supply. The switch unit 106 is configured to close when the low-voltage auxiliary power supply outputs a low-voltage signal. The switch unit 106 includes a second switch element 1061 for connecting between the positive electrode of the low-voltage auxiliary power supply and the positive electrode of the LED; and a third switch element 1062 for connecting between the negative electrode of the low-voltage auxiliary power supply and the negative electrode of the inverter 1041.

[0107] When the battery management unit is in the dormant state, the off-board charger controller 107 controls the second and third switches 1061 and 1062 to be open, leaving the first switch 1044 in the off-board state. After confirming that the charging device's charging plug is fully connected to the vehicle's charging port, the off-board charger controller 107 controls the second and third switches 1061 and 1062 to be closed, thereby connecting the LED and inverter 1041 in series and between the positive and negative electrodes of the low-voltage auxiliary power supply. The low-voltage auxiliary power supply outputs a low-voltage signal, causing current to flow through the LED and inverter 1041. The LED generates a light signal, which is then received by the optical receiver and converted into an electrical signal. The electrical signal is then output as a wake-up signal to the battery management module 101, thereby waking up the battery management module 101. The input end of the inverter 1041 receives the DC power output by the low-voltage auxiliary power supply, and converts the DC power into AC power and outputs it to the transformer 1042. After the transformer 1042 transforms the AC power, it outputs the transformed AC power to the rectifier bridge 1043. Since the first switching element 1044 is disconnected, the rectifier bridge 1043 and the first power supply module 102 are disconnected. During the wake-up period of the battery management module 101, the rectifier bridge 1043 will not supply power to the first power supply module 102.

[0108] After waking up, the battery management module 101 detects whether the voltage of the first power module 102 is less than or equal to a first threshold. If the voltage of the first power module 102 is less than or equal to the first threshold, the battery management module 101 controls the first switch element 1044 to close, so that the rectifier bridge 1043 outputs current to the first power module 102, thereby enabling power to be supplied to the first power module 102. If the voltage of the first power module 102 is greater than the first threshold, the battery management module 101 controls the first switch element 1044 to remain open and controls the connection of the battery to the charging device, so that the battery starts charging.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A charging system, characterized in that: include: Battery management module; a first power module, configured to supply power to the battery management module, wherein the battery management module is configured to be awakened in response to a wake-up signal and detect a first voltage of the first power module; A second power supply module; A transformer module is connected to the battery management module, the input end of the transformer module is connected to the second power module, and the output end of the transformer module is connected to the first power module. The battery management module is also used to control the transformer module to transform the voltage output by the second power module and output it to the first power module in response to the first voltage being less than or equal to a first threshold.

2. The charging system according to claim 1, wherein: The voltage transformation module includes: an inverter, wherein an input end of the inverter is used to connect to the second power module to convert the direct current output by the second power module into alternating current; a transformer, wherein an input end of the transformer is connected to an output end of the inverter so as to transform the alternating current output by the inverter; A rectifier bridge, wherein the input end of the rectifier bridge is connected to the output end of the transformer, the output end of the rectifier bridge is used to connect to the first power supply module, and the rectifier bridge is used to convert the current output by the transformer into direct current and output it to the first power supply module.

3. The charging system according to claim 2, wherein: The voltage transformation module further includes: a first switching element connected between the output end of the rectifier bridge and the first power module, and the battery management module is used to control the first switching element to be closed in response to the first voltage being less than or equal to the first threshold.

4. The charging system according to any one of claims 1 to 3, characterized in that: The charging system further includes: a wake-up module, wherein the input end of the wake-up module is connected to the second power module, and the output end of the wake-up module is connected to the battery management module. The awakening module is configured to: when the battery management module is in a dormant state, receive a voltage signal output by the second power module, and output the awakening signal to the battery management module in response to the voltage signal.

5. The charging system according to claim 4, characterized in that: The wake-up module includes: an input unit connected to the second power module, the input unit being configured to receive the voltage signal output by the second power module and output a trigger signal according to the voltage signal; An output unit is configured to receive the trigger signal and output a wake-up signal to the battery management module according to the trigger signal to wake up the battery management module.

6. The charging system according to claim 5, characterized in that: The charging system further includes: A switch unit is connected between the input unit and the second power module, and the switch unit is configured to be closed in response to the voltage signal so that the input unit is connected to the second power module.

7. The charging system according to claim 5, characterized in that The input unit includes a light emitting diode, and the output unit includes a light receiver.

8. The charging system according to claim 7, characterized in that: When the voltage conversion module includes an inverter, a transformer, a rectifier bridge and a first switching element, the light-emitting diode is connected in series with the inverter, and the light-emitting diode and the inverter are used to be connected between the positive and negative poles of the second power module after being connected in series.

9. The charging system according to claim 8, characterized in that The charging system further includes a switch unit connected between the input unit and the second power module, and the switch unit is configured to close in response to the voltage signal, wherein the switch unit includes: a second switching element, configured to be connected between the positive electrode of the second power module and the positive electrode of the light-emitting diode; The third switching element is configured to be connected between the negative electrode of the second power module and the negative electrode of the inverter.

10. The charging system according to any one of claims 1 to 3, characterized in that: The negative poles of the first power module and the second power module are both grounded, and the reference ground to which the negative pole of the second power module is connected is different from the reference ground to which the negative pole of the first power module is connected.

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