Charging device and power supply system of electric equipment

Abstract

The utility model provides a charging device and a power supply system of electric equipment, and belongs to the technical field of batteries. The charging device comprises a charging module, a heating module and a controller, the charging module is used for being connected to the positive electrode and the negative electrode of the battery to charge the battery, the heating module is used for being connected to the positive electrode and the negative electrode of the battery to heat the battery, and the controller is in communication connection with the heating module and the charging module. The controller is used for controlling the charging module to be connected with the positive electrode and the negative electrode of the battery so as to enable the charging module to charge the battery, controlling the heating module to be connected with the positive electrode and the negative electrode of the battery and enabling the heating module and the battery to alternately charge and discharge so as to heat the battery. The charging device provided by the utility model can improve the charging efficiency of the battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a charging device and a power supply system for electrical equipment. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] When the battery is at a low temperature, the battery activity will decrease and the electron transmission resistance inside the battery will increase, resulting in lower battery charging efficiency. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the background art. To this end, one purpose of the present application is to provide a charging device and a power supply system for an electrical device to solve the problem of low battery charging efficiency in the related art.

[0005] An embodiment of the first aspect of the present application provides a charging device, comprising: a charging module, the charging module being used to be connected to the positive and negative poles of a battery to charge the battery; a heating module being used to be connected to the positive and negative poles of the battery to heat the battery; a controller being communicatively connected to the heating module and the charging module, respectively, the controller being used to control the charging module to be connected to the positive and negative poles of the battery so that the charging module charges the battery, and being used to control the heating module to be connected to the positive and negative poles of the battery, and to enable the heating module and the battery to alternately charge and discharge to heat the battery.

[0006] In the technical solution of the embodiment of the present application, a heating module is provided in the charging device. When the battery temperature is low, the controller can control the heating module to connect to the positive and negative poles of the battery, and make the heating module and the battery alternately charged and discharged. The current generated during the alternating charge and discharge process can heat the battery, so that the temperature of the battery increases. In this way, the charging efficiency of the battery by the charging module can be improved. Moreover, since the heating module and the battery are alternately charged and discharged, that is, after the battery discharges to the heating module, the heating module will recharge the battery, so that while the battery is heated, the existing power in the battery will not be lost, which is conducive to improving the charging efficiency of the battery. In addition, the heating module is provided in the charging device, so that as long as the battery is charged by the charging device, it can be heated by the heating module in the charging device, without the need to set up an additional heating device for each battery, which can reduce costs.

[0007] In some embodiments, the heating module includes: a first energy storage circuit; a first switching circuit, the first switching circuit is used to connect to the positive and negative electrodes of the battery, the first switching circuit is also connected to the first energy storage circuit, and a controller is used to control the first switching circuit to connect the first energy storage circuit to the positive and negative electrodes of the battery, forming a charging circuit for charging the first energy storage circuit by the battery and a discharge circuit for discharging the first energy storage circuit to the battery, so that the heating module and the battery are alternately charged and discharged. The first energy storage circuit has the function of storing energy. The battery can release energy to the first energy storage circuit through the charging circuit, so that the first energy storage circuit temporarily stores the battery's energy. In the discharge circuit, the first energy storage circuit can release energy to the battery, that is, recharge the energy into the battery. Through the above process, not only can the battery be heated, but also after the battery is heated, the existing power of the battery will not be lost, thereby ensuring to a certain extent that the battery charging efficiency is improved.

[0008] In some embodiments, the first switching circuit includes: a first switching branch, wherein the two ends of the first switching branch are respectively connected to the positive and negative electrodes of the battery, the first switching branch including a first switching element and a second switching element connected in series, the midpoint between the first switching element and the second switching element being connected to the first end of the first energy tank circuit; and a second switching branch, wherein the two ends of the second switching branch are respectively connected to the two ends of the first switching branch, the second switching branch including a third switching element and a fourth switching element connected in series, the midpoint between the third switching element and the fourth switching element being connected to the second end of the first energy tank circuit. The first switching branch, the second switching branch, and the first energy tank circuit connected between the first and second switching branches form an H-bridge structure, which is simple and reliable. By controlling the conduction timings of the first, second, third, and fourth switching elements, the two ends of the first energy tank circuit can be connected to the positive and negative electrodes of the battery, respectively, forming the aforementioned charging and discharging circuits to achieve battery heating.

[0009] In some embodiments, the first switching branch is a first bridge arm, comprising a first upper bridge arm and a first lower bridge arm connected in series. The switching element of the first upper bridge arm serves as the first switching element, and the switching element of the first lower bridge arm serves as the second switching element. The second switching branch is a second bridge arm, comprising a second upper bridge arm and a second lower bridge arm connected in series. The switching element of the second upper bridge arm serves as the third switching element, and the switching element of the second lower bridge arm serves as the fourth switching element. The structures of the first and second bridge arms are simple and easy to control, simplifying the circuit of the heating module while improving the reliability of the controller's control over battery heating.

[0010] In some embodiments, the heating module further includes: a second switch circuit, wherein a first end of the second switch circuit is configured to be connected to the positive and negative electrodes of the battery, a second end of the second switch circuit is configured to be connected to the first switch circuit, and a controller is configured to control the second switch circuit to connect the first switch circuit and the positive and negative electrodes of the battery. The second switch circuit enables connection and disconnection between the first switch circuit and the first energy storage circuit and the battery. When the battery does not need to be heated, the second switch circuit can be used to disconnect the battery from the heating module, thereby improving the safety of the battery charging by the charging module.

[0011] In some embodiments, the first switch circuit includes: a first switch branch, wherein the two ends of the first switch branch are respectively connected to a second switch circuit, thereby respectively connecting to the positive and negative electrodes of the battery through the second switch circuit. The first switch branch includes a first switch element and a second switch element connected in series, with the midpoint between the first and second switch elements connected to the first end of the first energy storage circuit; and a second switch branch, wherein the two ends of the second switch branch are respectively connected to the two ends of the first switch branch. The second switch branch includes a third switch element and a fourth switch element connected in series, with the midpoint between the third and fourth switch elements connected to the second end of the first energy storage circuit. In other words, the two ends of the second switch branch are respectively connected to the two ends of the first switch branch. Thus, the on / off of the second switch circuit can control the on / off between the first and second switch branches and the positive and negative electrodes of the battery, thereby controlling the on / off between the first energy storage circuit and the positive and negative electrodes of the battery. This structure is simple and easy to control.

[0012] In some embodiments, the second switch circuit includes: a fifth switch element, a first end of the fifth switch element connected to the first end of the first switch branch, and a second end of the fifth switch element for connecting to one of the positive or negative electrodes of the battery; and a first connecting wire, a first end of the first connecting wire connected to the second end of the first switch branch, and a second end of the first connecting wire for connecting to the other of the positive or negative electrodes of the battery. When the fifth switch element is disconnected, the first ends of the first and second switch branches are disconnected from the other of the positive or negative electrodes of the battery, thereby preventing the first and second switch branches from forming a circuit with the battery and severing the connection to the battery. In other words, by providing only a single fifth switch element, the on / off connection between the heating module and the battery can be controlled, simplifying the circuit and reducing the cost of the charging device.

[0013] In some embodiments, the second switch circuit includes: a fifth switch element, a first end of the fifth switch element connected to the first end of the first switch branch, and a second end of the fifth switch element connected to one of the positive and negative electrodes of the battery; and a sixth switch element, a first end of the sixth switch element connected to the second end of the first switch branch, and a second end of the sixth switch element connected to the other of the positive and negative electrodes of the battery. The fifth and sixth switch elements can respectively control the connection and disconnection between the ends of the first and second switch branches and the positive and negative electrodes of the battery, allowing the battery to be completely disconnected from the heating module when heating is not required, greatly improving battery charging safety.

[0014] In some embodiments, the first energy storage circuit includes one or more inductors, wherein multiple inductors are connected in series and / or in parallel. Inductors have a large storage capacity and can store more energy, thereby improving the energy transfer efficiency between the battery and the first energy storage circuit, improving the heating efficiency of the battery, shortening the battery charging process, and improving the battery charging efficiency.

[0015] In some embodiments, the heating module further includes a second energy storage circuit, the two ends of which are respectively connected to the positive and negative electrodes of the battery. That is, the second energy storage circuit can be connected in parallel to the two ends of the battery, thereby forming a loop with the battery to achieve energy exchange with the battery, thereby improving the heating efficiency of the battery, thereby further shortening the battery charging process and improving charging efficiency.

[0016] In some embodiments, the second energy storage circuit includes a capacitor. The capacitor has charge and discharge functions, is relatively small, and can achieve rapid charge and discharge. This improves the heating efficiency of the battery while keeping the size of the heating module small, thereby keeping the overall size of the charging device small.

[0017] In some embodiments, the charging module includes: a third switching circuit, a first end of the third switching circuit being configured to connect the positive and negative electrodes of the battery; and a power unit connected to the second end of the third switching circuit. A controller is configured to control the third switching circuit to connect the power unit to the positive and negative electrodes of the battery, so that the power unit charges the battery. This allows the third switching circuit to disconnect the power unit from the battery before charging begins, improving safety.

[0018] In some embodiments, when the heating module further includes a second switching circuit, the controller is configured to switch between the second switching circuit and the third switching circuit. In this way, the battery can be charged and heated alternately, so that during the charging and heating processes, the charging module and the heating module are disconnected from each other, avoiding mutual interference and facilitating smooth battery charging and heating.

[0019] An embodiment of the second aspect of the present application provides a power supply system for an electrical device, which includes a battery; the charging device in the above embodiment is used to charge the battery.

[0020] 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

[0021] 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.

[0022] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0023] Figure 2 This is a functional block diagram of a charging device and a battery in a connected state in some embodiments of the present application;

[0024] Figure 3 This is one of the functional block diagrams of the charging device in some embodiments of the present application;

[0025] Figure 4 This is the second functional block diagram of the charging device in some embodiments of the present application;

[0026] Figure 5 This is one of the structural diagrams of the charging device and the battery in some embodiments of the present application;

[0027] Figure 6 A current path diagram for charging a first energy storage circuit by a battery in some embodiments of the present application;

[0028] Figure 7 A current path diagram of the first energy storage circuit discharging to the battery in some embodiments of the present application;

[0029] Figure 8 This is a second structural diagram of a charging device and a battery in a connected state according to some embodiments of the present application;

[0030] Figure 9 This is the third structural diagram of the charging device and battery in some embodiments of the present application in the connected state.

[0031] Description of reference numerals:

[0032] Vehicle 1000, third switching circuit 1021, power unit 1022, first energy tank circuit 1031, first switching circuit 1032, first switching branch 1032a, second switching branch 1032b, second switching circuit 1033, second energy tank circuit 1034;

[0033] Battery 100, charging device 101, charging module 102, heating module 103, controller 104;

[0034] Vehicle controller 200;

[0035] Motor 300;

[0036] Vehicle plug 11, vehicle socket 12;

[0037] A first switching element 21, a second switching element 22, a third switching element 23, and a fourth switching element 24;

[0038] First bridge arm 31, second bridge arm 32, current sensor 33;

[0039] Transformer 40;

[0040] First freewheeling diode D1, second freewheeling diode D2, third freewheeling diode D3, fourth freewheeling diode D4, charging positive relay K1, charging negative relay K2, fifth switching element K5, sixth switching element K6, positive electrode relay K11, negative electrode relay K12, first upper bridge arm switching tube V1, first lower bridge arm switching tube V2, second upper bridge arm switching tube V3, second lower bridge arm switching tube V4. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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 more than two, unless otherwise clearly and specifically defined.

[0044] 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.

[0045] 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.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0048] The impact of temperature on battery charging efficiency cannot be underestimated. When the battery temperature is low, its activity decreases, resulting in lower charging efficiency. For example, when the temperature of a lithium-ion battery is low, the chemical reaction rate within the battery slows down, resulting in lower charging efficiency.

[0049] In related technologies, batteries are typically heated using external heating devices, such as PTC (Positive Temperature Coefficient) thermistors. This heating method utilizes the principle of heat transfer to achieve heat exchange between the external heating device and the battery. This method has low heating efficiency and can easily lead to uneven temperatures between the outside and inside of the battery. Furthermore, when the battery is used in an electrical device, the device may not be equipped with an external heating device, making it impossible to heat the battery while charging.

[0050] Based on the above considerations, a charging device is designed, including a charging module, a heating module and a controller. The charging module is used to be connected to the positive and negative poles of the battery to charge the battery. The heating module is used to be connected to the positive and negative poles of the battery to heat the battery. The controller is communicated with the heating module and the charging module respectively. The controller is used to control the charging module to connect to the positive and negative poles of the battery so that the charging module charges the battery, and is used to control the heating module to connect to the positive and negative poles of the battery, and to enable the heating module and the battery to alternately charge and discharge to heat the battery.

[0051] When the battery temperature is low, the controller can control the heating module to connect to the positive and negative poles of the battery, and make the heating module and the battery alternately charged and discharged. The current generated during the alternating charge and discharge process can heat the battery, causing the battery temperature to rise. In this way, the charging efficiency of the battery by the charging module can be improved. Moreover, since the heating module and the battery are alternately charged and discharged, that is, after the battery discharges to the heating module, the heating module will recharge the battery, so that while the battery is heated, the existing power in the battery will not be lost, which is conducive to improving the charging efficiency of the battery. In addition, the heating module is set in the charging device, so that as long as the battery is charged by the charging device, it can be heated by the heating module in the charging device, without the need to set up an additional heating device for each battery, which can reduce costs.

[0052] The battery heating method disclosed in the embodiments of the present application can be used, but is not limited to, for heating batteries in electrical equipment such as vehicles, ships, or aircraft.

[0053] Electrical devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, etc. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0054] 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.

[0055] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a 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 may 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 operating power requirements of the vehicle 1000 during driving.

[0056] 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.

[0057] refer to Figure 2 , an embodiment of the present application provides a charging device 101, comprising: a charging module 102, the charging module 102 being used to connect to the positive and negative poles of a battery 100 to charge the battery 100; a heating module 103 being used to connect to the positive and negative poles of the battery 100 to heat the battery 100; a controller 104 being communicatively connected to the heating module 103 and the charging module 102, respectively, the controller 104 being used to control the charging module 102 to connect to the positive and negative poles of the battery 100 so that the charging module 102 charges the battery 100, and being used to control the heating module 103 to connect to the positive and negative poles of the battery 100, and to enable the heating module 103 and the battery 100 to alternately charge and discharge to heat the battery 100.

[0058] The battery 100 can be used to power an electrical device. For electrical devices, please refer to the above description and will not be described in detail below. The battery can include but is not limited to a lithium battery.

[0059] The connection in this application refers to connecting two or more electrical components through electrical connection in order to transmit electrical energy or signals, wherein the connection can be a direct connection, that is, directly connecting two electrical components, or an indirect connection, for example, two electrical components can be electrically connected through other conductors.

[0060] The charging device 101 has a charging interface for connecting to the positive and negative electrodes of the battery 100. The charging module 102 and the heating module 103 are respectively connected to the charging interface to connect to the positive and negative electrodes of the battery 100 through the charging interface.

[0061] In some embodiments, the battery 100 may be a battery 100 in a vehicle 1000, and the charging device 101 is used to charge the battery 100 in the vehicle 1000. The vehicle 1000 may include a vehicle interface, and the positive and negative electrodes of the battery 100 are connected to the vehicle interface. During charging, the vehicle interface is connected to the charging interface of the charging device 101, so that the positive and negative electrodes of the battery 100 are connected to the charging module 102 or the heating module 103 through the vehicle interface and the charging interface.

[0062] Exemplarily, the vehicle interface may include a vehicle socket 12, and the charging interface may include a vehicle plug 11. The vehicle socket 12 has a first positive terminal and a first negative terminal. The first positive terminal is used to connect to the positive terminal of the battery 100, and the first negative terminal is used to connect to the negative terminal of the battery 100. Correspondingly, the vehicle plug 11 has a second positive terminal and a second negative terminal. When the vehicle socket 12 is connected to the vehicle plug 11, the first positive terminal is connected to the second positive terminal, and the first negative terminal is connected to the second negative terminal. When the charging module 102 transmits direct current to the battery 100, the first positive terminal and the second positive terminal are the positive input of the direct current, and the first negative terminal and the second negative terminal are the negative output of the direct current. Figure 2 The DC+ in the code indicates the positive input of direct current. Figure 2 The DC- in the figure indicates the negative output of direct current.

[0063] In some embodiments, the vehicle 1000 may have a positive charging relay K1 and a negative charging relay K2. The positive charging relay K1 is used to connect the positive terminal of the battery 100 to the first positive terminal of the vehicle socket 12, and the negative charging relay K2 is used to connect the negative terminal of the battery 100 to the first negative terminal of the vehicle socket 12. When charging or heating is required, the vehicle controller 200 controls the positive charging relay K1 and the negative charging relay K2 to be closed. When charging and heating are not required, the vehicle controller 200 controls the positive charging relay K1 and the negative charging relay K2 to be closed to ensure safety.

[0064] The charging device 101 may include but is not limited to a charging pile. Taking the charging device 101 as a charging pile as an example, the vehicle plug 11 may be a charging gun of the charging pile.

[0065] The charging module 102 may include an output terminal and an input terminal, wherein the output terminal is connected to the positive terminal of the battery 100, and the input terminal is connected to the negative terminal of the battery 100. The charging current of the charging module 102 is output from the output terminal to the positive terminal of the battery 100 and then flows back to the charging module 102 from the output terminal.

[0066] For example, the output end of the charging module 102 can be connected to the second positive terminal of the vehicle plug 11, and the input end can be connected to the second negative terminal of the vehicle plug 11, so that the output end and input end of the charging module 102 can be connected to the positive and negative poles of the battery 100 through the vehicle plug 11 and the vehicle socket 12.

[0067] The charging module 102 may include, but is not limited to, one or a combination of a unidirectional AC / DC (Alternating Current / Direct Current) switching power supply module, a three-phase AC / DC switching power supply module, and a DC / DC (Direct Current / Direct Current) switching power supply module.

[0068] The controller 104 controls the alternating charge and discharge between the heating module 103 and the battery 100 , which means controlling the heating module 103 to connect to the battery 100 to perform at least one operation of the battery 100 charging the heating module 103 and the heating module 103 discharging the battery 100 .

[0069] In some embodiments, the controller 104 can control the charging module 102 and the heating module 103 to be connected to the positive and negative poles of the battery 100 at the same time, so as to simultaneously perform the operations of the charging module 102 charging the battery 100 and the heating module 103 heating the battery 100 .

[0070] In other embodiments, the controller 104 may also control the charging module 102 and the heating module 103 to not be connected to the positive and negative poles of the battery 100 at the same time, that is, while the charging module 102 is charging the battery 100, the heating module 103 is disconnected from the positive and negative poles of the battery 100 and does not heat the battery 100; while the heating module 103 is heating the battery 100, the charging module 102 is disconnected from the positive and negative poles of the battery 100 and does not charge the battery 100.

[0071] In some embodiments, the controller 104 can be a non-on-board charger controller. After the positive and negative poles of the battery 100 are physically connected to the charging interface of the charging device 101, the controller 104 can control the charging module 102 and / or the heating module 103 to be connected to the charging interface of the charging device 101, so that the charging module 102 and / or the heating module 103 can be connected to the positive and negative poles of the battery 100 through the charging interface.

[0072] For example, battery 100 is a battery 100 in vehicle 1000. After the vehicle interface is physically connected to the vehicle socket 12 of the charging device 101, the vehicle 1000 and the controller 104 of the charging device 101 establish communication and perform a handshake to determine whether the charging device 101 has a heating module 103. After the handshake is successful, if the vehicle 1000 detects that the temperature of the battery 100 is higher than or equal to a preset value, it indicates that the battery 100 does not need to be heated. The vehicle controller 200 sends a charging message to the controller 104 of the charging device 101. The controller 104 of the charging device 101 controls the charging module 102 to connect to the vehicle socket 12, establishes a charging circuit between the charging module 102 and the battery 100, and charges the battery 100.

[0073] If before charging the battery 100 or during the charging process of the battery 100, the vehicle 1000 detects that the temperature of the battery 100 is lower than a preset value, the vehicle controller 200 sends a heating request to the controller 104 of the charging device 101. In response to the request of the vehicle 1000, the controller 104 of the charging device 101 can disconnect the charging module 102 from the battery 100 and send a heating message to the vehicle 1000. After the vehicle 1000 receives the heating message, the vehicle controller 200 sends a heating current frequency and amplitude request to the controller 104 of the charging device 101. The controller 104 of the charging device 101 responds to the request of the vehicle 1000 and compares the heating current frequency and amplitude with the heating current frequency and amplitude allowed by the heating module 103. If the heating current frequency and amplitude are within the allowable range, an instruction to allow heating with this current is sent to the vehicle controller 200.

[0074] After the vehicle 1000 receives the instruction allowing heating with this current, the vehicle controller 200 controls the charging positive relay K1 and the charging negative relay K2 to close, and the controller 104 of the charging device 101 controls the heating module 103 to connect to the vehicle socket 12 to establish a heating circuit between the heating module 103 and the battery 100, thereby realizing alternating charging and discharging between the heating module 103 and the battery 100.

[0075] If the heating current frequency and amplitude requested by the vehicle 1000 are not within the allowable range, the controller 104 of the charging device 101 sends an instruction to the vehicle controller 200 not to allow heating, and the vehicle controller 200 closes the charging positive relay K1 and the charging negative relay K2. The controller 104 of the charging device 101 controls the charging module 102 to connect to the vehicle socket 12, and establishes a charging circuit between the charging module 102 and the battery 100 to charge the battery 100.

[0076] While the heating module 103 of the charging device 101 is heating the battery 100, the vehicle controller 200 can monitor the temperature of the battery 100 in real time. If the temperature of the battery 100 is greater than or equal to a preset value, the heating process has terminated. The vehicle controller 200 sends a heating termination instruction to the controller 104 of the charging device 101. The controller 104 of the charging device 101 then disconnects the heating module 103 from the vehicle socket 12 and, in turn, from the battery 100.

[0077] After heating is completed, the vehicle controller 200 sends a message to the controller 104 of the charging device 101 to continue charging. The controller 104 of the charging device 101 controls the charging module 102 to connect to the vehicle socket 12, establishes a charging circuit between the charging module 102 and the battery 100, and continues to charge the battery 100.

[0078] In the above technical solution, a heating module 103 is provided in the charging device 101. When the temperature of the battery 100 is low, the controller 104 can control the heating module 103 to connect to the positive and negative poles of the battery 100, and make the heating module 103 and the battery 100 alternately charged and discharged. The current generated during the alternating charge and discharge process can heat the battery 100, so that the temperature of the battery 100 increases. In this way, the charging efficiency of the charging module 102 for the battery 100 can be improved.

[0079] Moreover, since the heating module 103 and the battery 100 are charged and discharged alternately, that is, after the battery 100 discharges to the heating module 103, the heating module 103 will recharge the battery 100, so that while the battery 100 is heated, the existing power in the battery 100 will not be consumed, which is beneficial to improving the charging efficiency of the battery 100.

[0080] In addition, the heating module 103 is provided in the charging device 101, so that any battery 100 charged by the charging device 101 can be heated by the heating module 103 in the charging device 101, without the need to set up an additional heating device for each battery 100, which can reduce costs. For example, for the battery 100 in the vehicle 1000, even if the vehicle 1000 is not provided with a device for heating the battery 100, the battery 100 in the vehicle 1000 can be heated during the charging process to quickly increase the temperature of the battery 100, increase the charging rate, and save the user waiting time. At the same time, since there is no need to set up a device for heating the battery 100 in the vehicle 1000, the drive motor on the vehicle side will not be used to drive the heating of the battery 100, and thus there will be no risk of motor life reduction, reduced reliability, or even rotor demagnetization due to motor heat generation.

[0081] refer to Figure 3According to some embodiments of the present application, the heating module 103 includes: a first energy storage circuit 1031; a first switching circuit 1032, the first switching circuit 1032 is used to connect to the positive and negative electrodes of the battery 100, and the first switching circuit 1032 is also connected to the first energy storage circuit 1031. The controller 104 is used to control the first switching circuit 1032 to connect the first energy storage circuit 1031 to the positive and negative electrodes of the battery 100, forming a charging circuit for the battery 100 to charge the first energy storage circuit 1031 and a discharging circuit for the first energy storage circuit 1031 to discharge the battery 100, so that the heating module and the battery 100 are alternately charged and discharged.

[0082] In the charging loop, the battery 100 discharges energy into the first energy storage circuit 1031 , and the first energy storage circuit 1031 stores energy. In the discharging loop, the first energy storage circuit 1031 releases energy to the battery 100 .

[0083] The first energy storage circuit 1031 may include a first end and a second end. The controller 104 may control the first switch circuit 1032 to connect the first end of the first energy storage circuit 1031 to the positive electrode of the battery 100, and connect the second end of the first energy storage circuit 1031 to the negative electrode of the battery 100 to form a charging circuit. The current of the battery 100 flows out from the positive electrode and flows through the first end and the second end of the first energy storage circuit 1031 in sequence, and then flows back from the negative electrode of the battery 100 to charge the first energy storage circuit 1031. The current direction in the first energy storage circuit 1031 is from the first end to the second end.

[0084] While the battery 100 is charging the first energy storage circuit 1031, the controller 104 can control the first switch circuit 1032 to connect the first end of the first energy storage circuit 1031 to the negative electrode of the battery 100 and the second end of the first energy storage circuit 1031 to the positive electrode of the battery 100, thereby forming a discharge circuit. Because the current in the first energy storage circuit 1031 flows from the first end to the second end, the current in the first energy storage circuit 1031 flows out of the second end, then sequentially through the positive electrode of the battery 100, the negative electrode of the battery 100, and finally flows back from the first end of the first energy storage circuit 1031, thereby discharging the first energy storage circuit 1031 from the battery 100.

[0085] In some embodiments, the charging device 101 includes a charging interface, wherein a first interface terminal of the charging interface is connected to the positive terminal of the battery 100, and a second interface terminal is connected to the negative terminal of the battery 100. For example, when the charging interface is a vehicle plug 11, the first interface terminal serves as the first positive terminal, and the second interface terminal serves as the first negative terminal. The first switching circuit 1032 can connect the first interface terminal and the second interface terminal of the charging interface. The controller 104 can control the first switching circuit 1032 to connect the first terminal of the first energy storage circuit 1031 to one of the first interface terminal or the second interface terminal of the charging interface, and to connect the second terminal of the first energy storage circuit 1031 to the other of the first interface terminal or the second interface terminal of the charging interface.

[0086] The first energy storage circuit 1031 includes but is not limited to energy storage elements such as inductors or capacitors.

[0087] In the above technical solution, the first energy storage circuit 1031 has the function of storing energy. The battery 100 can release energy to the first energy storage circuit 1031 through the charging circuit, so that the first energy storage circuit 1031 temporarily stores the energy of the battery 100. In the discharge circuit, the first energy storage circuit 1031 can release the energy to the battery 100, that is, recharge the energy into the battery 100. Through the above process, not only can the battery 100 be heated, but also after the battery 100 is heated, the existing power of the battery 100 will not be consumed, thereby ensuring to a certain extent that the charging efficiency of the battery 100 is improved.

[0088] refer to Figure 4 According to some embodiments of the present application, the first switch circuit 1032 includes: a first switch branch 1032a, where the two ends of the first switch branch 1032a are respectively used to connect to the positive electrode and the negative electrode of the battery 100, and the first switch branch 1032a includes a first switch element 21 and a second switch element 22 connected in series, and the midpoint between the first switch element 21 and the second switch element 22 is connected to the first end of the first energy storage circuit 1031; a second switch branch 1032b, where the two ends of the second switch branch 1032b are respectively connected to the two ends of the first switch branch 1032a, and the second switch branch 1032b includes a third switch element 23 and a fourth switch element 24 connected in series, and the midpoint between the third switch element 23 and the fourth switch element 24 is connected to the second end of the first energy storage circuit 1031.

[0089] The end of the first switching element 21 away from the second switching element 22 can be used to connect to the positive electrode of the battery 100, and the end of the second switching element 22 away from the first switching element 21 can be used to connect to the negative electrode of the battery 100. The end of the third switching element 23 away from the fourth switching element 24 can be connected to the end of the first switching element 21 away from the second switching element 22, and the end of the fourth switching element 24 away from the third switching element 23 can be connected to the end of the second switching element 22 away from the first switching element 21. For example, the end of the first switching element 21 away from the second switching element 22 can be connected to the first interface terminal of the charging interface, and the end of the second switching element 22 away from the first switching element 21 can be connected to the second interface terminal of the charging interface.

[0090] When the two ends of the first switch branch 1032a are connected to the positive and negative electrodes of the battery 100, by controlling the on-off of the first switch element 21, the on-off between the first end of the first energy storage circuit 1031 and the positive electrode of the battery 100 can be controlled; by controlling the on-off of the second switch element 22, the on-off between the first end of the first energy storage circuit 1031 and the negative electrode of the battery 100 can be controlled; by controlling the on-off of the third switch element 23, the on-off between the second end of the first energy storage circuit 1031 and the positive electrode of the battery 100 can be controlled; and by controlling the on-off of the fourth switch element 24, the on-off between the second end of the first energy storage circuit 1031 and the negative electrode of the battery 100 can be controlled.

[0091] In some embodiments, in order to form the above-mentioned charging loop, the controller 104 can control the first switch element 21 and the fourth switch element 24 to be turned on, and the second switch element 22 and the third switch element 23 to be turned off, so that the first end of the first energy storage circuit 1031 is connected to the positive electrode of the battery 100 through the first switch element 21, and the second end of the first energy storage circuit 1031 is connected to the negative electrode of the battery 100 through the fourth switch element 24, and the battery 100 charges the first energy storage circuit 1031.

[0092] In order to form the above-mentioned discharge loop, the controller 104 can control the second switch element 22 and the third switch element 23 to be turned on, and the first switch element 21 and the fourth switch element 24 to be turned off during the period when the battery 100 charges the first energy storage circuit 1031, so that the first end of the first energy storage circuit 1031 is connected to the negative electrode of the battery 100 through the second switch element 22, and the second end of the first energy storage circuit 1031 is connected to the positive electrode of the battery 100 through the third switch element 23, and the first energy storage circuit 1031 discharges the battery 100.

[0093] The principle of the battery 100 charging the first energy storage circuit 1031 through the above-mentioned charging circuit and the principle of the first energy storage circuit 1031 discharging to the battery 100 through the above-mentioned discharging circuit can refer to the relevant description in the above-mentioned embodiment and will not be repeated here.

[0094] In some embodiments, the first switching element 21, the second switching element 22, the third switching element 23 and the fourth switching element 24 can all be elements that can control the on and off of the circuit, including but not limited to relays, MOS tubes (Metal-Oxide-Semiconductor Field-Effect Transistor) or IGBT tubes (Insulate-Gate Bipolar Transistor).

[0095] In the above technical solution, the first switch branch 1032a, the second switch branch 1032b and the first energy storage circuit 1031 connected between the first switch branch 1032a and the second switch branch 1032b form an H-bridge structure, which is simple and reliable. By controlling the different conduction timings between the first switch element 21, the second switch element 22, the third switch element 23 and the fourth switch element 24, the two ends of the first energy storage circuit 1031 can be connected to the positive and negative electrodes of the battery 100, respectively, and the above-mentioned charging circuit and discharging circuit are formed to achieve heating of the battery 100.

[0096] refer to Figure 5 According to some embodiments of the present application, the first switching branch is the first bridge arm 31, the first bridge arm 31 includes a first upper bridge arm and a first lower bridge arm connected in series, the switching element of the first upper bridge arm serves as the first switching element, and the switching element of the first lower bridge arm serves as the second switching element; the second switching branch is the second bridge arm 32, the second bridge arm 32 includes a second upper bridge arm and a second lower bridge arm connected in series, the switching element of the second upper bridge arm serves as the third switching element, and the switching element of the second lower bridge arm serves as the fourth switching element.

[0097] The first upper arm may include a first upper arm switching transistor V1, and the first lower arm may include a first lower arm switching transistor V2. The first upper arm switching transistor V1 serves as the first switching element, and the first lower arm switching transistor V2 serves as the second switching element. By turning on or off the first upper arm switching transistor V1 and the first lower arm switching transistor V2, the first upper arm and the first lower arm can be turned on or off. The types of the first upper arm switching transistor V1 and the first lower arm switching transistor V2 include, but are not limited to, MOS transistors or IGBT transistors.

[0098] The second upper arm may include a second upper arm switch V3, and the second lower arm may include a second lower arm switch V4. The second upper arm switch V3 serves as the third switching element, and the second lower arm switch V4 serves as the fourth switching element. By turning the second upper arm switch V3 and the second lower arm switch V4 on or off, the second upper arm and the second lower arm can be turned on or off. The types of the second upper arm switch V3 and the second lower arm switch V4 include, but are not limited to, MOS transistors or IGBT transistors.

[0099] When the two ends of the first switch branch 1032a are respectively connected to the positive pole and the negative pole of the battery 100, the controller 104 can alternately perform the first operation and the second operation in sequence to alternately form a charging circuit of the battery 100 to the first energy storage circuit 1031 and a discharging circuit of the first energy storage circuit 1031 to the battery 100.

[0100] The first operation includes controlling the first upper bridge arm and the second lower bridge arm to be turned on and the first lower bridge arm and the second upper bridge arm to be turned off. The second operation includes controlling the first lower bridge arm and the second upper bridge arm to be turned on and the first upper bridge arm and the second lower bridge arm to be turned off, thereby forming a discharge loop for the first energy storage circuit 1031 to discharge the battery 100.

[0101] like Figure 6 As shown, the controller 104 performs a first operation, and the first upper bridge arm, the first energy storage circuit 1031, the second lower bridge arm and the battery 100 form a charging circuit, wherein the first end of the first energy storage circuit 1031 is connected to the positive electrode of the battery 100 through the first upper bridge arm, and the second end of the first energy storage circuit 1031 is connected to the negative electrode of the battery 100 through the second lower bridge arm. The current flows out from the positive electrode of the battery 100, flows through the first upper bridge arm, the first energy storage circuit 1031 and the second lower bridge arm in sequence, and then flows back to the negative electrode of the battery 100. The battery 100 charges the first energy storage circuit 1031. Figure 6 The solid line with an arrow in the middle shows the current path for the battery 100 to charge the first energy storage circuit 1031 .

[0102] like Figure 7 As shown, before the first energy storage circuit 1031 is not saturated, the controller 104 performs a second operation, and the first lower bridge arm, the first energy storage circuit 1031, the second upper bridge arm and the battery 100 form a discharge loop, wherein the first end of the first energy storage circuit 1031 is connected to the negative electrode of the battery 100 through the first lower bridge arm, and the second end of the first energy storage circuit 1031 is connected to the positive electrode of the battery 100 through the second upper bridge arm. The current in the first energy storage circuit 1031 flows into the positive electrode of the battery 100 due to maintaining the flow direction from the first end to the second end, and flows back to the first energy storage circuit 1031 from the negative electrode of the battery 100, thereby realizing the discharge of the first energy storage circuit 1031 to the battery 100. Figure 7The solid line with an arrow shows the current path for the first energy storage circuit 1031 to discharge into the battery 100 .

[0103] It is not difficult to find that during the first operation period and the second operation period, the current flowing through the battery 100 is in opposite directions, that is, the rate of change of the current flowing through the battery 100 is large, thereby achieving high-frequency heating of the battery 100 and improving charging efficiency.

[0104] In some embodiments, the first upper-arm switch V1 is provided with a first freewheeling diode D1, the first lower-arm switch V2 is provided with a second freewheeling diode D2, the second upper-arm switch V3 is provided with a third freewheeling diode D3, and the second lower-arm switch V4 is provided with a fourth freewheeling diode D4. Thus, when the first operation switches to the second operation, current can freewheel through the first freewheeling diode D1 and the fourth freewheeling diode D4, or when the second operation switches to the first operation, current can freewheel through the second freewheeling diode D2 and the third freewheeling diode D3, thereby maintaining the direction of current flow in the first energy tank circuit 1031.

[0105] The controller 104 can adjust the magnitude of the current flowing through the first upper-arm switching transistor V1 and the second lower-arm switching transistor V4 by controlling the magnitude of the control voltage applied to the control terminals of the first upper-arm switching transistor V1 and the second lower-arm switching transistor V4, thereby controlling the frequency and amplitude of the current in the charging circuit. Similarly, the controller 104 can adjust the magnitude of the current flowing through the first lower-arm switching transistor V2 and the second upper-arm switching transistor V3 by controlling the magnitude of the control voltage applied to the control terminals of the first lower-arm switching transistor V2 and the second upper-arm switching transistor V3, thereby controlling the frequency and amplitude of the current in the discharging circuit.

[0106] In some embodiments, the heating module 103 also includes a current sensor 33, which is connected between the midpoint of the first bridge arm 31 and the first end of the first energy storage circuit 1031, and is used to detect the current size in the discharge circuit and the charging circuit so that the current meets the current frequency and amplitude required for heating the battery 100.

[0107] In the above technical solution, the structures of the first bridge arm 31 and the second bridge arm 32 are simple and easy to control, which can simplify the circuit of the heating module 103 and improve the reliability of the controller 104 in controlling the heating of the battery 100 .

[0108] refer to Figure 5According to some embodiments of the present application, the heating module 103 further includes: a second switching circuit 1033, a first end of the second switching circuit 1033 is used to connect to the positive and negative poles of the battery 100, a second end of the second switching circuit 1033 is used to connect to the first switching circuit 1032, and the controller 104 is used to control the second switching circuit 1033 to connect to the first switching circuit 1032 and the positive and negative poles of the battery 100.

[0109] The first end of the second switch circuit 1033 can be connected to the charging interface to connect to the positive and negative poles of the battery 100 through the charging interface. In this way, the first switch circuit 1032 can be connected to the charging interface through the second switch circuit 1033, and then connected to the positive and negative poles of the battery 100.

[0110] When the battery 100 does not need to be heated, the controller 104 can control the second switch circuit 1033 to be turned off to disconnect the entire heating module 103 from the battery 100 to ensure safety. For example, while the charging module 102 is charging the battery 100, the second switch circuit 1033 can be turned off to ensure that charging can proceed normally. When the battery 100 needs to be heated, the controller 104 can control the second switch circuit 1033 to be closed so that the first switch circuit 1032 can be connected to the positive and negative electrodes of the battery 100, thereby allowing the controller 104 to control the first switch circuit 1032 to realize the formation of the above-mentioned charging circuit and discharging circuit.

[0111] In the above technical solution, the second switch circuit 1033 can realize the connection and disconnection between the first switch circuit 1032 and the first energy storage circuit 1031 and the battery 100. When the battery 100 does not need to be heated, the second switch circuit 1033 can cut off the connection between the battery 100 and the heating module 103, thereby improving the safety of the charging module 102 charging the battery 100.

[0112] It is understandable that in other embodiments, the heating module 103 may not be provided with the second switch circuit 1033, that is, the first switch circuit 1032 may be directly connected to the charging interface, and the entire heating module 103 and the battery 100 can be disconnected by cutting off the connection between the first switch circuit 1032 and the charging interface.

[0113] According to some embodiments of the present application, the first switching circuit includes: a first switching branch, the two ends of the first switching branch are respectively connected to the second switching circuit, so as to be respectively connected to the positive and negative electrodes of the battery through the second switching circuit, the first switching branch includes a first switching element and a second switching element connected in series, and the midpoint between the first switching element and the second switching element is connected to the first end of the first energy storage circuit; a second switching branch, the two ends of the second switching branch are respectively connected to the two ends of the first switching branch, the second switching branch includes a third switching element and a fourth switching element connected in series, and the midpoint between the third switching element and the fourth switching element is connected to the second end of the first energy storage circuit.

[0114] For the structures of the first switch branch and the second switch branch and the principles of forming the charging circuit and the discharging circuit, reference may be made to the relevant descriptions in the above embodiments, which will not be repeated here.

[0115] Both ends of the first switch branch and the second switch branch can be connected to the first interface end and the second interface end of the charging interface respectively through the second switch circuit, and then can be connected to the positive electrode and the negative electrode of the battery respectively.

[0116] When the battery needs to be heated, the controller can first control the second switch circuit to close, so that the ends of the first switch branch and the second switch branch are connected to the positive and negative terminals of the battery, respectively. The controller then controls the conduction timing of the first and second switch elements of the first switch branch, and the third and fourth switch elements of the second switch branch, to form the aforementioned charging and discharging circuits, respectively.

[0117] When the battery does not need to be heated, the controller can first control the second switch circuit to turn off, so that the connection between the first switch branch, the second switch branch, the first energy storage circuit and the battery can be disconnected, thereby ensuring the safety of the charging module when charging the battery.

[0118] In the above technical solution, the two ends of the second switch branch and the two ends of the first switch branch are respectively connected to the second switch circuit, so that the on-off of the second switch circuit can control the on-off between the first switch branch and the second switch branch and the positive and negative electrodes of the battery, thereby controlling the on-off between the first energy storage circuit and the positive and negative electrodes of the battery. The structure is simple and easy to control.

[0119] refer to Figure 8According to some embodiments of the present application, the second switching circuit 1033 may include: a fifth switching element K5, a first end of the fifth switching element K5 is connected to the first end of the first switching branch, and a second end of the fifth switching element K5 is used to connect to one of the positive or negative electrodes of the battery 100; a first connecting line, a first end of the first connecting line is connected to the second end of the first switching branch, and a second end of the first connecting line is used to connect to the other of the positive or negative electrodes of the battery 100.

[0120] In some embodiments, the second end of the fifth switch element K5 can be connected to the first interface end of the charging interface to connect to the positive electrode of the battery 100, and the second end of the first connecting line can be connected to the second interface end of the charging interface to connect to the negative electrode of the battery 100. In this way, the first end of the first switch branch and the first end of the second switch branch can both be connected to and disconnected from the positive electrode of the battery 100 via the fifth switch element K5, and the second end of the first switch branch and the second end of the second switch branch can both be connected to the negative electrode of the battery 100 via the first connecting line. The end of the first switch element away from the second switch element serves as the first end of the first switch branch, the end of the second switch element away from the first switch element serves as the second end of the first switch branch, the end of the third switch element away from the fourth switch element serves as the first end of the second switch branch, and the end of the fourth switch element away from the third switch element serves as the second end of the second switch branch.

[0121] In other embodiments, the second end of the fifth switch element K5 can be connected to the second interface terminal of the charging interface to connect to the negative electrode of the battery 100, and the second end of the first connecting wire can be connected to the first interface terminal of the charging interface to connect to the positive electrode of the battery 100. In this way, the first end of the first switch branch and the first end of the second switch branch can both be connected to the negative electrode of the battery 100 via the fifth switch element K5, and the second end of the first switch branch and the second end of the second switch branch can both be connected to the positive electrode of the battery 100 via the first connecting wire. The end of the second switch element away from the first switch element serves as the first end of the first switch branch, the end of the first switch element away from the second switch element serves as the second end of the first switch branch, the end of the fourth switch element away from the third switch element serves as the first end of the second switch branch, and the end of the third switch element away from the fourth switch element serves as the second end of the second switch branch. The first and second switch elements can each be switching elements of the first bridge arm, and the third and third switch elements can each be switching elements of the second bridge arm.

[0122] When the fifth switch element K5 is disconnected, the first ends of the first switch branch and the second switch branch are disconnected from the other of the positive electrode or the negative electrode of the battery 100, so that the first switch branch and the second switch branch cannot form a loop with the battery 100, thereby cutting off the connection with the battery 100.

[0123] In some embodiments, the fifth switching element K5 may include but is not limited to switching elements such as relays.

[0124] In the above technical solution, only one fifth switch element K5 is provided to control the on-off connection between the heating module 103 and the battery 100 , thereby simplifying the circuit and reducing the cost of the charging device 101 .

[0125] refer to Figure 5 According to some embodiments of the present application, the second switch circuit 1033 may also include: a fifth switch element K5, wherein a first end of the fifth switch element K5 is connected to the first end of the first switch branch, and a second end of the fifth switch element K5 is used to be connected to one of the positive electrode or the negative electrode of the battery 100; and a sixth switch element K6, wherein a first end of the sixth switch element K6 is connected to the second end of the first switch branch, and a second end of the sixth switch element K6 is used to be connected to the other of the positive electrode or the negative electrode of the battery 100.

[0126] In some embodiments, the second end of the fifth switch element K5 can be connected to the first interface terminal of the charging interface to connect to the positive electrode of the battery 100, and the second end of the sixth switch element K6 can be connected to the second interface terminal of the charging interface to connect to the negative electrode of the battery 100. In this way, the first end of the first switch branch and the first end of the second switch branch can both be connected and disconnected to the positive electrode of the battery 100 through the fifth switch element K5, and the second end of the first switch branch and the second end of the second switch branch can both be connected and disconnected to the negative electrode of the battery 100 through the sixth switch element K6. The end of the first switch element away from the second switch element serves as the first end of the first switch branch, the end of the second switch element away from the first switch element serves as the second end of the first switch branch, the end of the third switch element away from the fourth switch element serves as the first end of the second switch branch, and the end of the fourth switch element away from the third switch element serves as the second end of the second switch branch.

[0127] In other embodiments, the second end of the fifth switch element K5 can be connected to the second interface terminal of the charging interface to connect to the negative electrode of the battery 100, and the second end of the sixth switch element K6 can be connected to the first interface terminal of the charging interface to connect to the positive electrode of the battery 100. In this way, the first end of the first switch branch and the first end of the second switch branch can both be connected and disconnected to the negative electrode of the battery 100 via the fifth switch element K5, and the second end of the first switch branch and the second end of the second switch branch can both be connected and disconnected to the positive electrode of the battery 100 via the sixth switch element K6. The end of the second switch element away from the first switch element serves as the first end of the first switch branch, the end of the first switch element away from the second switch element serves as the second end of the first switch branch, the end of the fourth switch element away from the third switch element serves as the first end of the second switch branch, and the end of the third switch element away from the fourth switch element serves as the second end of the second switch branch.

[0128] The controller 104 controls the fifth switch element K5 and the sixth switch element K6 to be turned off, so that both ends of the first switch branch and the second switch branch are disconnected from the positive and negative electrodes of the battery 100 , thereby cutting off the connection between the heating module 103 and the battery 100 .

[0129] The controller 104 controls the fifth switch element K5 and the sixth switch element K6 to be closed, so that both ends of the first switch branch and the second switch branch are respectively connected to the positive and negative poles of the battery 100, and then can be connected to the battery 100 by controlling the heating module 103, and the above-mentioned charging circuit and discharging circuit are formed by controlling the first switch branch and the second switch branch.

[0130] In some embodiments, the fifth switching element K5 and the sixth switching element K6 may include, but are not limited to, switching elements such as relays.

[0131] In the above technical solution, the fifth switch element K5 and the sixth switch element K6 can respectively control the on / off between the two ends of the first switch branch 1032a and the second switch branch 1032b and the positive and negative poles of the battery 100, so that the battery 100 can be completely disconnected from the heating module 103 when no heating is required, thereby greatly improving the safety of charging the battery 100.

[0132] refer to Figure 5 According to some embodiments of the present application, the first energy storage circuit 1031 includes one or more inductors, wherein the multiple inductors are connected in series and / or in parallel.

[0133] Exemplarily, the first switch branch may be the first bridge arm 31 , and the second switch branch may be the second bridge arm 32 .

[0134] When the first energy storage circuit 1031 includes an inductor, a first end of the inductor is connected to the midpoint of the first bridge arm 31 , and a second end of the inductor is connected to the midpoint of the second bridge arm 32 .

[0135] The first energy storage circuit 1031 includes multiple inductors, and when the multiple inductors are connected in parallel, the first end of each inductor can be connected to the midpoint of the first bridge arm 31, and the second end of each inductor can be connected to the midpoint of the second bridge arm 32.

[0136] When multiple inductors are connected in series, the multiple inductors connected in series are connected between the midpoint of the first bridge arm 31 and the midpoint of the second bridge arm 32 .

[0137] The midpoint of the first bridge arm 31 refers to the node between the first upper bridge arm and the first lower bridge arm, and the midpoint of the second bridge arm 32 refers to the node between the second upper bridge arm and the second lower bridge arm.

[0138] In the above technical solution, the inductor has a large storage space and can store more energy, thereby improving the energy transfer efficiency between the battery 100 and the first energy storage circuit 1031, improving the heating efficiency of the battery 100, shortening the charging process of the battery 100, and improving the charging efficiency of the battery 100.

[0139] Continue to refer Figure 5 According to some embodiments of the present application, the heating module 103 further includes a second energy storage circuit 1034 , and two ends of the second energy storage circuit 1034 are respectively used to be connected to the positive electrode and the negative electrode of the battery 100 .

[0140] The first end of the second energy storage circuit 1034 can be connected to the first interface end of the charging interface to connect to the positive pole of the battery 100, and the second end of the second energy storage circuit 1034 can be connected to the second interface end of the charging interface to connect to the negative pole of the battery 100.

[0141] In some embodiments, the heating module also includes a second switching circuit 1033, and the first end of the second switching circuit 1033 is connected to the charging interface, and the two ends of the second energy storage circuit 1034 can be connected to the second end of the second switching circuit 1033 to connect to the positive and negative poles of the battery 100 through the second switching circuit 1033.

[0142] In some embodiments, the heating module 103 further includes a first switch branch 1032a and a second switch branch 1032b, and the two ends of the second energy storage circuit 1034 can be connected to the two ends of the first switch branch 1032a, respectively, wherein the first switch branch 1032a is the first bridge arm 31, and the second switch branch 1032b is the second bridge arm 32. Figure 5As shown, the second switching circuit 1033 includes a fifth switching element K5 and a sixth switching element K6. The fifth switching element K5 is connected between the first interface terminal of the charging interface and the first upper bridge arm, and the sixth switching element K6 is connected between the second interface terminal and the first lower bridge arm. The first end of the second energy storage circuit 1034 is connected to the first upper bridge arm, and the second end of the second energy storage circuit 1034 is connected to the first lower bridge arm.

[0143] In this way, during the period when the controller 104 controls the second switch circuit 1033 , the first bridge arm 31 and the second bridge arm 32 to form a charging circuit and a discharging circuit, the second energy storage circuit 1034 can be connected in parallel to both ends of the battery 100 .

[0144] Exemplarily, when the controller 104 controls the second switch circuit 1033 to close, the first upper bridge arm and the second lower bridge arm are turned on, and the first lower bridge arm and the second upper bridge arm are turned off, a charging circuit for the battery 100 to charge the first energy storage circuit 1031 is formed, and the second energy storage circuit 1034 is connected in parallel to the two ends of the battery 100. While the battery 100 charges the first energy storage circuit 1031, it also charges the second energy storage circuit 1034, and the second energy storage circuit 1034 stores energy.

[0145] When the controller 104 controls the second switch circuit 1033 to close, the first lower bridge arm and the second upper bridge arm are turned on, and the first upper bridge arm and the second lower bridge arm are turned off, a discharge loop of the first energy storage circuit 1031 to the battery 100 is formed, and the second energy storage circuit 1034 is connected in parallel to the two ends of the battery 100. During the period when the first energy storage circuit 1031 discharges the battery 100, the second energy storage circuit 1034 discharges the battery 100.

[0146] That is to say, the second energy storage circuit 1034 can also realize energy exchange with the battery 100 , thereby improving the heating efficiency of the battery 100 .

[0147] In some embodiments, the second energy storage circuit 1034 may include but is not limited to energy storage elements such as capacitors or inductors.

[0148] In the above technical solution, the second energy storage circuit 1034 can be connected in parallel to the two ends of the battery 100, so as to form a loop with the battery 100 to realize energy exchange with the battery 100, thereby improving the heating efficiency of the battery 100, thereby further shortening the charging process of the battery 100 and improving the charging efficiency.

[0149] According to some embodiments of the present application, the second energy storage circuit 1034 includes a capacitor.

[0150] The first energy storage circuit 1031 may include an inductor. Both inductors and capacitors have charging and discharging functions. By configuring the first energy storage circuit 1031 to include an inductor and the second energy storage circuit 1034 to include a capacitor, the battery 100 can simultaneously charge the first energy storage circuit 1031 and the second energy storage circuit 1034, and simultaneously discharge the first energy storage circuit 1031 and the second energy storage circuit 1034 into the battery 100. For specific methods, please refer to the relevant description of the above embodiment and will not be repeated here.

[0151] In the above technical solution, the capacitor has the function of charging and discharging, and the capacitor is small in size and can also achieve rapid charging and discharging. While improving the heating efficiency of the battery 100, the volume of the heating module 103 is kept small, so that the overall volume of the charging device 101 remains small.

[0152] refer to Figure 9 According to some embodiments of the present application, the charging module 102 includes: a third switching circuit 1021, a first end of the third switching circuit 1021 is used to connect the positive pole and the negative pole of the battery 100; a power unit 1022, and the power unit 1022 is connected to the second end of the third switching circuit 1021. The controller 104 is used to control the third switching circuit 1021 to connect the power unit 1022 and the positive pole and the negative pole of the battery 100, so that the power unit 1022 charges the battery 100.

[0153] The first end of the third switching circuit 1021 can be connected to the charging interface to connect to the positive and negative electrodes of the battery 100. The power unit 1022 may include a positive electrode and a negative electrode, wherein the positive electrode of the power unit 1022 is used to connect to the positive electrode of the battery 100 through the third switching circuit 1021, and the negative electrode of the power unit 1022 is used to connect to the negative electrode of the battery 100 through the third switching circuit 1021. The power unit 1022 outputs a charging current from the positive electrode to the positive electrode of the battery 100, and the charging current flows from the negative electrode of the battery 100 to the negative electrode of the power unit 1022, and then flows back to the power unit 1022. The positive and negative electrodes of the power unit 1022 can be connected to the first and second interface terminals of the charging interface respectively through the third switching circuit 1021 to connect to the positive and negative electrodes of the battery 100 respectively.

[0154] In some embodiments, the third switching circuit 1021 may include a positive pole relay K11 and a negative pole relay K12, the positive pole relay K11 connecting the positive pole of the power unit 1022 and the first interface end of the charging interface, and the negative pole relay K12 connecting the negative pole of the power unit 1022 and the second interface end of the charging interface.

[0155] When the battery 100 needs to be charged, for example, when the controller 104 receives a charging message, the controller 104 controls the positive relay K11 and the negative relay K12 to close, so that the power unit 1022 is connected to the positive and negative poles of the battery 100 to form a charging circuit.

[0156] When the battery 100 does not need to be charged, for example, when the controller 104 receives a message indicating that charging is completed or the battery 100 needs to be heated, the controller 104 controls the positive relay K11 and the negative relay K12 to be turned off, so that the power unit 1022 is disconnected from the battery 100 .

[0157] In some embodiments, the power unit 1022 may include, but is not limited to, a unidirectional AC / DC power supply, a three-phase AC / DC power supply, a DC / DC power supply, or a combination of one or more.

[0158] For example, the power unit 1022 may include a combination of an AC / DC power supply and a DC / DC power supply. The input terminal of the AC / DC power supply is used to receive external AC power and convert the AC power into DC power before outputting it from the output terminal of the AC / DC power supply.

[0159] A transformer 40 is also provided between the AC / DC power supply and the DC / DC power supply. The DC power output from the AC / DC power supply is transformed by transformer 40 and then input into the DC / DC power supply for further transformation to the required charging voltage. This voltage is then used to charge the battery 100. The positive electrode of the DC / DC power supply serves as the positive electrode of the power unit, while the negative electrode of the DC / DC power supply serves as the negative electrode of the power unit. A positive electrode relay K11 connects the first interface terminal of the charging interface to the positive electrode of the DC / DC power supply, while a negative electrode relay K12 connects the second interface terminal of the charging interface to the negative electrode of the DC / DC power supply.

[0160] In the above technical solution, when the battery 100 does not start to be charged, the third switch circuit 1021 can be used to disconnect the power unit 1022 from the battery 100, thereby improving safety.

[0161] According to some embodiments of the present application, when the heating module 103 further includes a second switch circuit 1033 , the controller 104 is configured to switch the conduction of the second switch circuit 1033 and the third switch circuit 1021 .

[0162] That is, the controller 104 is configured not to turn on the second switch circuit 1033 and the third switch circuit 1021 at the same time. In other words, when the controller 104 controls the third switch circuit 1021 to turn on so that the power unit 1022 charges the battery 100, the controller 104 controls the third switch circuit 1021 to turn off so as to disconnect the heating module 103 from the battery 100. When the controller 104 controls the second switch circuit 1033 to turn on so that the heating module 103 heats the battery 100, the controller 104 controls the second switch circuit 1033 to turn off so as to disconnect the charging module 102 from the battery 100.

[0163] Exemplarily, the battery 100 is a vehicle battery. When the controller 104 of the charging device 101 receives a charging message sent by the vehicle controller, it controls the third switch circuit 1021 to be turned on and the second switch circuit 1033 to be turned off.

[0164] After the controller 104 of the charging device 101 receives the heating message, the vehicle controller sends a heating current frequency and amplitude to the controller 104 of the charging device 101, and the heating current frequency and amplitude are within the range of the heating current frequency and amplitude allowed by the heating module 103. Then, the controller 104 of the charging device 101 controls the second switch circuit 1033 to turn on and the third switch circuit 1021 to turn off.

[0165] In the above technical solution, the battery 100 can be charged and heated alternately, so that during the charging process and the heating process of the battery 100, the charging module 102 and the heating module 103 are not connected to each other, avoiding mutual influence, which is conducive to the smooth charging and heating of the battery 100.

[0166] An embodiment of the present application provides a power supply system for an electrical device, which includes a battery 100; the charging device 101 in the above embodiment, the charging device 101 is used to charge the battery 100.

[0167] The charging device 101 is used to connect the positive electrode and the negative electrode of the battery 100. The connection method can refer to the relevant description in the above embodiment and will not be repeated below.

[0168] For the electrical equipment, reference may be made to the relevant description in the above embodiments, which will not be repeated below.

[0169] The power supply system of the electrical equipment has the beneficial effects of the electrical equipment provided by the embodiments of the present application. For details, please refer to the specific descriptions of the electrical equipment in the above embodiments, which will not be repeated here.

[0170] The present application embodiment provides a charging device 101, referring to Figure 2 as well as Figure 9The charging device 101 includes: a charging module 102, which is used to be connected to the positive and negative poles of the battery 100 to charge the battery 100; a heating module 103, which is used to be connected to the positive and negative poles of the battery 100 to heat the battery 100; a controller 104, which is respectively communicated with the heating module 103 and the charging module 102, and the controller 104 is used to control the charging module 102 to connect to the positive and negative poles of the battery 100 so that the charging module 102 charges the battery 100, and to control the heating module 103 to connect to the positive and negative poles of the battery 100, and to make the heating module 103 and the battery 100 alternately charge and discharge to heat the battery 100.

[0171] The heating module 103 includes a first bridge arm 31, a second bridge arm 32, and a first energy storage circuit 1031. The first end of the first bridge arm 31 is connected to the first end of the second bridge arm 32, and the second end of the first bridge arm 31 is connected to the second end of the second bridge arm 32. The two ends of the first energy storage circuit 1031 are respectively connected to the midpoint of the first bridge arm 31 and the midpoint of the second bridge arm 32. The first energy storage circuit 1031 is an inductor.

[0172] The heating module 103 further includes a second switching circuit 1033, which includes a fifth switching element K5 and a sixth switching element K6. The fifth switching element K5 connects the first end of the first bridge arm 31 to the first interface end of the charging interface of the charging device 101, and the sixth switching element K6 connects the second end of the first bridge arm 31 to the second interface end of the charging interface of the charging device 101. The first interface end is used to connect to the positive electrode of the battery 100, and the second interface end is used to connect to the negative electrode of the battery 100.

[0173] The heating module 103 further includes a capacitor, and two ends of the capacitor are respectively connected to the first end and the second end of the first bridge arm 31 .

[0174] The charging module 102 includes a third switching circuit 1021 and a power unit 1022. The power unit 1022 includes a combination of an AC / DC power supply and a DC / DC power supply. A transformer 40 is also provided between the AC / DC power supply and the DC / DC power supply. The DC power output from the output end of the AC / DC power supply is transformed by the transformer 40 and then input into the DC / DC power supply for further transformation to reach the voltage required for charging, and this voltage is used to charge the battery 100.

[0175] The third switch circuit 1021 includes a positive relay K11 and a negative relay K12. The positive relay K11 is connected to the first interface end of the charging interface and the positive electrode of the DC / DC power supply, and the negative relay K12 is connected to the second interface end of the charging interface and the negative electrode of the DC / DC power supply.

[0176] 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 device, characterized in that: include: a charging module, the charging module being configured to be connected to the positive and negative electrodes of the battery to charge the battery; a heating module, the heating module being configured to be connected to the positive electrode and the negative electrode of the battery to heat the battery; a controller, communicatively connected to the heating module and the charging module, respectively, the controller being configured to control the charging module to connect to the positive and negative electrodes of the battery so that the charging module charges the battery, and to control the heating module to connect to the positive and negative electrodes of the battery so that the heating module and the battery alternately charge and discharge to heat the battery; The charging device also has a charging interface, which is used to connect the positive and negative poles of the battery. The charging module and the heating module are respectively connected to the charging interface to be connected to the positive and negative poles of the battery through the charging interface.

2. The charging device according to claim 1, characterized in that The heating module comprises: a first tank circuit; a first switching circuit, the first switching circuit is used to be connected to the positive and negative electrodes of the battery, the first switching circuit is also connected to the first energy storage circuit, the controller is used to control the first switching circuit to connect the first energy storage circuit to the positive and negative electrodes of the battery, forming a charging circuit for the battery to charge the first energy storage circuit and a discharging circuit for the first energy storage circuit to discharge the battery, so that the heating module and the battery are alternately charged and discharged.

3. The charging device according to claim 2, characterized in that The first switching circuit includes: a first switch branch, wherein two ends of the first switch branch are respectively used to be connected to the positive electrode and the negative electrode of the battery, the first switch branch includes a first switch element and a second switch element connected in series, and a midpoint between the first switch element and the second switch element is connected to the first end of the first energy storage circuit; A second switch branch, wherein the two ends of the second switch branch are respectively connected to the two ends of the first switch branch, the second switch branch includes a third switch element and a fourth switch element connected in series, and the midpoint between the third switch element and the fourth switch element is connected to the second end of the first energy storage circuit.

4. The charging device according to claim 3, characterized in that The first switching branch is a first bridge arm, the first bridge arm includes a first upper bridge arm and a first lower bridge arm connected in series, the switching element of the first upper bridge arm serves as the first switching element, and the switching element of the first lower bridge arm serves as the second switching element; The second switch branch is a second bridge arm, which includes a second upper bridge arm and a second lower bridge arm connected in series. The switch element of the second upper bridge arm serves as the third switch element, and the switch element of the second lower bridge arm serves as the fourth switch element.

5. The charging device according to claim 2, wherein: The heating module further comprises: A second switching circuit, wherein the first end of the second switching circuit is used to connect to the positive and negative poles of the battery, the second end of the second switching circuit is used to connect to the first switching circuit, and the controller is used to control the second switching circuit to connect to the first switching circuit and the positive and negative poles of the battery.

6. The charging device according to claim 5, characterized in that The first switching circuit includes: a first switch branch, wherein both ends of the first switch branch are respectively connected to the second switch circuit to be connected to the positive electrode and the negative electrode of the battery respectively through the second switch circuit, the first switch branch comprising a first switch element and a second switch element connected in series, and a midpoint between the first switch element and the second switch element is connected to the first end of the first energy storage circuit; A second switch branch, wherein the two ends of the second switch branch are respectively connected to the two ends of the first switch branch, the second switch branch includes a third switch element and a fourth switch element connected in series, and the midpoint between the third switch element and the fourth switch element is connected to the second end of the first energy storage circuit.

7. The charging device according to claim 6, characterized in that The second switching circuit includes: a fifth switch element, wherein a first end of the fifth switch element is connected to the first end of the first switch branch, and a second end of the fifth switch element is used to be connected to one of the positive electrode or the negative electrode of the battery; A first connecting line, wherein a first end of the first connecting line is connected to the second end of the first switch branch, and a second end of the first connecting line is used to be connected to the other of the positive electrode or the negative electrode of the battery.

8. The charging device according to claim 6, characterized in that The second switching circuit includes: a fifth switch element, wherein a first end of the fifth switch element is connected to the first end of the first switch branch, and a second end of the fifth switch element is configured to be connected to one of the positive electrode or the negative electrode of the battery; A sixth switch element, wherein a first end of the sixth switch element is connected to the second end of the first switch branch, and a second end of the sixth switch element is used to be connected to the other of the positive electrode or the negative electrode of the battery.

9. The charging device according to any one of claims 2 to 8, characterized in that: The first energy storage circuit includes one or more inductors, wherein a plurality of inductors are connected in series and / or in parallel.

10. The charging device according to any one of claims 2 to 8, characterized in that: The heating module further includes a second energy storage circuit, wherein two ends of the second energy storage circuit are respectively used to be connected to the positive electrode and the negative electrode of the battery.

11. The charging device according to claim 10, characterized in that: The second energy storage circuit includes a capacitor.

12. The charging device according to any one of claims 1 to 8, characterized in that: The charging module includes: a third switch circuit, wherein a first end of the third switch circuit is used to connect the positive electrode and the negative electrode of the battery; A power unit is connected to the second end of the third switch circuit, and the controller is used to control the third switch circuit to connect the power unit and the positive and negative electrodes of the battery, so that the power unit charges the battery.

13. The charging device according to claim 12, characterized in that: In the case that the heating module further includes a second switching circuit, the controller is configured to switch the conduction of the second switching circuit and the third switching circuit.

14. A power supply system for electrical equipment, characterized in that: include: Battery; The charging device according to any one of claims 1 to 13, wherein the charging device is used to charge the battery.

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