Battery heating circuit and system and battery module

Abstract

The utility model relates to a battery heating circuit and system and a battery module, the battery heating circuit comprises an inductance module, a capacitance module, a first switch module, a second switch module and a battery heating module, the first switch module is controlled through a first switch control signal, and the second switch module is controlled through a second switch control signal; the first switch control signal or the second switch control signal is a pulse signal, so that the heating input power of the battery heating module is controlled through the pulse signal and the energy storage of the inductance module and the capacitance module, and a power-controllable battery heating mode is realized; the problem that the user experience is poor due to the fact that the battery cannot be heated in a specific scene in the prior art is solved, and the battery product reliability and the user satisfaction can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery heating circuit, system and battery module. Background Technology

[0002] With the rapid development of energy storage technology, battery technology is also constantly improving, making batteries increasingly widely used.

[0003] In low-temperature environments, the chemical properties of batteries decrease sharply, limiting their performance. To improve the overall performance of batteries under low-temperature conditions, heating films are typically used to heat the batteries.

[0004] However, when outdoor energy storage devices are charged using photovoltaic panels, there is a scenario where the battery pack needs to reach a certain temperature before it can be charged, such as in the early morning or evening, when the temperature is low, cloudy, and sunlight is weak. In such cases, the charging may not be able to start, resulting in a poor user experience. Utility Model Content

[0005] In view of this, this application provides a battery heating circuit, system and battery module to solve the problem caused by the inability to heat the battery normally in scenarios where the power supply voltage is unstable and the power is low.

[0006] In a first aspect, embodiments of this application provide a battery heating circuit, including: an inductor module, a capacitor module, a first switch module, a second switch module, and a battery heating module;

[0007] The first terminal of the first switch module, the second terminal of the inductor module, and the first terminal of the capacitor module are electrically connected. The second terminal of the first switch module is electrically connected to the first terminal of the battery heating module. The second terminal of the battery heating module is electrically connected to the first terminal of the second switch module. The second terminal of the second switch module and the second terminal of the capacitor module are both electrically connected to the reference ground of the battery heating circuit. The first terminal of the inductor module is electrically connected to the power supply terminal of the battery heating circuit.

[0008] The control terminal of the first switch module is used to receive a first switch control signal, and the control terminal of the second switch module is used to receive a second switch control signal. The first switch control signal or the second switch control signal is a pulse signal, and the pulse signal is used to control the heating input power of the battery heating module.

[0009] Optionally, the inductor module includes: a protection device and a first inductor;

[0010] The first end of the first inductor is electrically connected to the power supply terminal through the protection device, and the second end of the first inductor, the first end of the first switch module, and the first end of the capacitor module are electrically connected.

[0011] Optionally, the protection device includes a fuse;

[0012] The first end of the fuse is electrically connected to the power supply terminal, and the second end of the fuse is electrically connected to the first end of the first inductor.

[0013] Optionally, the capacitor module includes a first capacitor;

[0014] The first terminal of the first capacitor, the first terminal of the first switching module, and the second terminal of the inductor module are electrically connected, and the second terminal of the first capacitor is electrically connected to the reference ground.

[0015] Optionally, the first switching module includes a first switching transistor;

[0016] The first terminal of the first switching transistor, the second terminal of the inductor module, and the first terminal of the capacitor module are electrically connected. The second terminal of the first switching transistor is electrically connected to the first terminal of the battery heating module. The control terminal of the first switching transistor serves as the control terminal of the first switching module. The first switching control signal is specifically used to control the first switching transistor.

[0017] Optionally, the second switching module includes a second switching transistor;

[0018] The first terminal of the second switching transistor is electrically connected to the second terminal of the battery heating module, the second terminal of the second switching transistor is electrically connected to the reference ground, the control terminal of the second switching transistor serves as the control terminal of the second switching module, and the second switching control signal is specifically used to control the second switching transistor.

[0019] Optionally, the battery heating module includes a heating film;

[0020] The first end of the heating film is electrically connected to the second end of the first switch module, and the second end of the heating film is electrically connected to the first end of the second switch module.

[0021] Optionally, the battery heating circuit described above may also include a control module;

[0022] The heating control signal terminal of the control module is electrically connected to the control terminal of the first switch module, and the heating control signal terminal is used to output the first switch control signal. The power control signal terminal of the control module is electrically connected to the control terminal of the second switch module, and the power control signal terminal is used to output the second switch control signal. The sampling signal terminal of the control module is electrically connected to the power supply terminal, and the sampling signal terminal is used to sample the electrical energy of the power supply terminal.

[0023] The control module is used to adjust the duty cycle of the pulse signal according to the electrical energy at the power supply terminal.

[0024] Secondly, embodiments of this application provide a battery heating system, including a battery heating circuit as described in any one of the first aspects of this application.

[0025] Thirdly, embodiments of this application provide a battery module that includes a battery heating system as described in the second aspect of this application.

[0026] The battery heating circuit, system, and battery module provided in this application embodiment include an inductor module, a capacitor module, a first switch module, a second switch module, and a battery heating module. The inductor module and the capacitor module are electrically connected via a first terminal, a second terminal, and a first terminal. The second terminal of the first switch module is electrically connected to the first terminal of the battery heating module, and the second terminal of the battery heating module is electrically connected to the first terminal of the second switch module. Both the second terminal of the second switch module and the second terminal of the capacitor module are electrically connected to the reference ground of the battery heating circuit. The first terminal of the inductor module is electrically connected to the power supply terminal of the battery heating circuit. The control terminal of the first switch module is used to receive a first switch control signal to control the first switch module. The control terminal of the second switch module is used to receive a second switch control signal to control the second switch module. The first switch control signal or the second switch control signal is a pulse signal. The heating input power of the battery heating module is controlled by the pulse signal and the energy stored in the inductor module and the capacitor module, thereby realizing a power-controllable battery heating method. This solves the problem of poor user experience caused by the inability to heat the battery in certain scenarios in existing related technologies, and can effectively improve the reliability of battery products and user satisfaction. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0030] Figure 1 A structural block diagram of a battery heating circuit provided in an embodiment of this application;

[0031] Figure 2 A schematic diagram of a battery heating circuit provided in an optional embodiment of this application;

[0032] Figure 3 A schematic diagram of a battery heating circuit provided as an example of this application;

[0033] Figure 4 This is a schematic diagram of the structure of a battery heating system provided in an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the structure of a battery module provided in an embodiment of this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0037] To address the problem in existing technologies where heating devices cannot be used for battery heating in specific scenarios with unstable power supply voltage and low power, this application provides a battery heating circuit, system, and battery module, comprising an inductor module, a capacitor module, a first switch module, a second switch module, and a battery heating module. The first switch module is controlled by a first switch control signal, and the second switch module is controlled by a second switch control signal. Both the first and second switch control signals are pulse signals, which control the heating input power of the battery heating module and the energy storage of the inductor and capacitor modules, thus achieving a power-controllable battery heating method.

[0038] Figure 1 This is a structural block diagram of a battery heating circuit for a controller provided in an embodiment of this application. Figure 1 As shown, the battery heating circuit provided in this embodiment may specifically include: an inductor module 110, a capacitor module 120, a first switch module 130, a second switch module 140, and a battery heating module 150; wherein, the first terminal of the first switch module 130, the second terminal of the inductor module 110, and the first terminal of the capacitor module 120 are electrically connected; the second terminal of the first switch module 130 is electrically connected to the first terminal of the battery heating module 150; the second terminal of the battery heating module 150 is electrically connected to the first terminal of the second switch module 140; and the second terminals of the second switch module 140 and the second terminal of the capacitor module 120 are both electrically connected to the reference ground of the battery heating circuit. The inductor module 110 is connected to the power supply terminal P+ of the battery heating circuit. The control terminal of the first switch module 130 is used to receive the first switch control signal S1 to control the first switch module 130. The control terminal of the second switch module 140 is used to receive the second switch control signal S2 to control the second switch module 140. The first switch control signal S1 or the second switch control signal S2 is a pulse signal to control the heating input power of the battery heating module 150 and the energy storage of the inductor module and the capacitor module, thereby realizing a power-controllable battery heating method.

[0039] In this embodiment, a pulse signal is used to control the heating input power of the battery heating module 150. For example, the pulse signal can be a square wave signal output according to the power supply energy. This square wave signal serves as a power control signal, and the duty cycle of the power control signal can be adjusted according to the power supply energy. For example, when the power supply energy is the charging energy provided by the photovoltaic panel, the duty cycle of the square wave signal with a fixed frequency can be adjusted according to the photovoltaic strength. The adjusted pulse signal is then transmitted as a power control signal to the control terminal of the first switch module 130 or the control terminal of the second switch control module. The pulse signal can then control the opening and closing of the first switch module 130 or the second switch module 140. By continuously opening and closing, the heating input power can be controlled, thus solving the problem in the prior art where battery heating cannot be performed in specific scenarios where the power supply voltage is unstable and the power is low. This effectively improves the reliability of battery products and the user experience.

[0040] As can be seen, the battery heating circuit provided in this application embodiment is electrically connected through the first terminal of the first switch module 130, the second terminal of the inductor module 110, and the first terminal of the capacitor module 120. The second terminal of the first switch module 130 is electrically connected to the first terminal of the battery heating module 150, and the second terminal of the battery heating module 150 is electrically connected to the first terminal of the second switch module 140. The second terminals of the second switch module 140 and the second terminal of the capacitor module 120 are both electrically connected to the reference ground of the battery heating circuit. The first terminal of the inductor module 110 is connected to the power supply of the battery heating circuit. The battery is electrically connected to terminal P+ and controls the first switch module 130 via the first switch control signal S1 and the second switch module 140 via the second switch control signal S2. The first switch control signal S1 or the second switch control signal S2 is a pulse signal, which controls the heating input power of the battery heating module 150 and the energy storage of the inductor module 110 and capacitor module 120 through the pulse signal. This achieves a power-controllable battery heating method, which solves the problem of poor user experience caused by the inability to heat the battery in certain scenarios in existing related technologies. It can effectively improve the reliability of battery products and user satisfaction.

[0041] In a specific implementation, the power supply terminal P+ of the battery heating circuit can be electrically connected to the power supply interface of the battery pack, and the reference ground of the battery heating circuit can be electrically connected to the discharge interface P- of the battery pack. For example, the power supply terminal P+ can be the power supply terminal of the photovoltaic panel, so that the photovoltaic panel can be used as a power source, and the power provided by the photovoltaic panel can be used to charge the battery.

[0042] For example, when the battery heating is activated, a continuous high-level signal can be sent by the microcontroller unit (MCU) as the first switch control signal S1, which is transmitted to the control terminal of the first switch module 130. This first switch control signal S1 controls the first switch module 130 to enter a closed conduction state. Furthermore, the MCU can send a pulse square wave signal with a fixed frequency and fixed duty cycle as the second switch control signal S2, which is transmitted to the control terminal of the second switch module 140. Figure 2 As shown, the operating state of the second switch module 140 is controlled by a pulse square wave signal. When the pulse square wave signal controls the second switch module 140 to be in a closed conducting state, the second switch module 140 is turned on. At this time, the power supply terminal P+ of the battery heating circuit, the inductor module 110, the first switch module 130, the battery heating module 150, the second switch module 140, and the reference ground of the battery heating circuit form a power supply loop. The battery heating module 150 operates normally to heat the battery, and can simultaneously charge the capacitor module 120 using the power supplied by the power supply terminal P+. When the second switch module 140 is in the off-off state, it is disconnected, and no power supply circuit is formed. The battery heating module 150 then stops heating, meaning it is not working. Thus, by controlling the second switch module 140 to continuously turn on and off via a pulse square wave signal, and by storing energy in the inductor module 110 and capacitor module 120, power control can be achieved. This realizes a power-controllable battery heating method, thereby solving the problem of poor user experience caused by the inability to heat batteries in specific scenarios in existing related technologies. It can effectively improve the reliability of battery products and user satisfaction.

[0043] Of course, in addition to using the pulse square wave signal as the second switch control signal S2 to achieve power control through the second switch module 140, other methods can also be used to achieve power control in this embodiment of the application. For example, the pulse square wave signal can be used as the first control signal to achieve power control through the first switch module 130. This embodiment of the application does not limit this.

[0044] As an example of this application, when power control is achieved through the first switch module 130, when battery heating is turned on, a continuous high-level signal can be provided by the microcontroller unit (MCU) as the second switch control signal S2, which is transmitted to the control terminal of the second switch module 140. This second switch control signal S2 controls the second switch module 140 to enter a closed conduction state. Furthermore, the MCU can send a pulse square wave signal with a fixed frequency and fixed duty cycle as the first switch control signal S1, which is transmitted to the control terminal of the first switch module 130. This pulse square wave signal controls the operating state of the first switch module 130. When the pulse square wave signal controls the first switch module 130 to be in a closed conduction state, the first switch module 130 is turned on. At this time, the power supply terminal P+ of the battery heating circuit, the inductor module 110, the first switch module 130, the battery heating module 150, the second switch module 140, and the reference ground of the battery heating circuit form a power supply loop. The battery heating module 150 operates normally to heat the battery and simultaneously charges the capacitor module 120 using the power supplied by the power supply terminal P+. When the pulse square wave signal controls the first switch module 130 to be in the off state, the first switch module 130 is disconnected, and no power supply circuit is formed. The battery heating module 150 then stops heating, meaning it does not operate. By continuously switching the first switch module 130 on and off using the pulse square wave signal, and by storing energy in the inductor module 110 and capacitor module 120, power control can be achieved. This realizes a power-controllable battery heating method, thereby solving the problem of poor user experience caused by the inability to heat the battery in specific scenarios in existing related technologies. This effectively improves the reliability of battery products and user satisfaction.

[0045] In some optional embodiments of this application, the inductor module 110 may include: a protection device 111 and a first inductor L1, such as Figure 2 As shown, the first end of the first inductor L1 is electrically connected to the power supply terminal P+ through the protection device 111. The second end of the first inductor L1, the first end of the first switch module 130, and the first end of the capacitor module 120 are electrically connected. This allows the protection device 111 to prevent short circuits from causing fires or explosions, thus achieving current protection. The protection device 111 may include, but is not limited to, a fuse, or other protective devices; no limitation is made here.

[0046] For example, such as Figure 3As shown, when the protection device includes fuse F1, the first end of fuse F1 is electrically connected to the power supply terminal P+, and the second end of fuse F1 is electrically connected to the first end of the first inductor L1. Thus, short circuit protection can be achieved through fuse F1, thereby effectively preventing the risk of fire and explosion caused by short circuit.

[0047] In this embodiment, the capacitor module 120 can be used to filter out ripple current in the circuit, achieving a filtering and voltage stabilization effect. Optionally, the capacitor module 120 in this embodiment includes one or more capacitors; such as... Figure 3 As shown, taking a single capacitor as an example, the first terminal of the first capacitor C1, the first terminal of the first switching module 130, and the second terminal of the inductor module 110 are electrically connected. The second terminal of the first capacitor C1 is electrically connected to the reference ground. When multiple capacitors are included, they are connected in parallel, allowing the battery heating circuit to filter out ripple current through the first capacitor C1, thus achieving a filtering and voltage regulation function. The inductor module 110 may include a first inductor L1 to achieve filtering and voltage regulation.

[0048] In specific implementation, one or more switching devices can be used to implement the function of the first switching module 130 in this application embodiment. For example, the function of the first switching module 130 in this application embodiment can be implemented by one switching device. This application embodiment does not make specific restrictions on this.

[0049] In some optional embodiments of this application, the first switch module 130 may include a first switch transistor SW1; the first terminal of the first switch transistor SW1, the second terminal of the inductor module 110, and the first terminal of the capacitor module 120 are electrically connected, the second terminal of the first switch transistor SW1 is electrically connected to the first terminal of the battery heating module 150, and the control terminal of the first switch transistor SW1 serves as the control terminal of the first switch module 130, thereby controlling the first switch transistor SW1 through the first switch control signal S1. For example, if the first switch control signal S1 is a normally open and normally closed signal sent by the MCU, the first switch control signal S1 can control the first switch transistor SW1 to be normally closed, so that the first switch transistor SW1 is in a closed conducting state, so that the power supplied by the power supply terminal P+ is transmitted to the battery heating module 150 through the conducting first switch transistor SW1 to supply power to the battery heating module 150 and ensure that the battery heating module 150 can work normally.

[0050] In specific implementation, one or more second switching transistors SW2 can be used to implement the function of the second switching module 140 in this application embodiment. For example, the function of the first switching module 130 in this application embodiment can be implemented by one second switch. This application embodiment does not make specific restrictions on this.

[0051] In some optional embodiments of this application, the second switch module 140 includes a second switch transistor SW2; the first terminal of the second switch transistor SW2 is electrically connected to the second terminal of the battery heating module 150, and the second terminal of the second switch transistor SW2 is electrically connected to the reference ground. The control terminal of the second switch transistor SW2 serves as the control terminal of the second switch module 140, thereby controlling the second switch transistor SW2 through the second switch control signal S2. For example, if the second switch control signal S2 is a pulse square wave signal sent by the MCU, the second switch transistor SW2 can be turned on and off by the pulse square wave signal, so that the second switch transistor SW2 continuously turns on and off according to the pulse square wave signal, thereby achieving the effect of power control and controlling the heating input power. This solves the pain point problem of existing battery heating technology in nightclub scenarios, enables reasonable energy allocation, and improves product reliability and customer satisfaction.

[0052] In some optional embodiments of this application, a battery heating film can be used as the battery heating module 150 in this embodiment to achieve the heating function of the battery heating module 150 through the heating film. Optionally, the battery heating module 150 in this embodiment includes a heating film; the first end of the heating film is electrically connected to the second end of the first switch module 130, and the second end of the heating film is electrically connected to the first end of the second switch module 140, so that the battery heating circuit can heat the battery through the heating film to achieve the battery heating function.

[0053] Furthermore, in the embodiments of this application, the first switching transistor SW1 and the second switching transistor SW2 can both be implemented using devices such as metal-oxide-semiconductor field-effect transistors (MOSFETs), or electronic switching devices such as transistors or relays. The embodiments of this application do not impose specific limitations on this.

[0054] Of course, in addition to including the inductor module 110, capacitor module 120, first switch module 130, second switch module 140 and battery heating module 150, the battery heating circuit provided in this application embodiment may also include other functional modules such as control module and battery. This application embodiment does not limit this.

[0055] Optionally, the battery heating circuit provided in this embodiment further includes a control module (not shown). This control module is used to adjust the duty cycle of a pulse signal according to the energy at the power supply terminal, so as to achieve power control by adjusting the duty cycle of the pulse signal. For example, the sampling signal terminal of the control module is used to electrically connect to the power supply terminal to sample the electrical energy at the power supply terminal. The heating control signal terminal of the control module is electrically connected to the control terminal of the first switch module 130, and the power control signal terminal of the control module is electrically connected to the control terminal of the second switch module 140. The heating control signal terminal is used to output the first switch control signal S1, and the power control signal terminal is used to output the pulse signal, so that the pulse signal is transmitted to the second switch module 140 as the second switch control signal S2. That is, the power control signal terminal can be used to output the second switch control signal S2, so that the control module adjusts the duty cycle of the pulse signal according to the electrical energy at the power supply terminal, and controls the working state of the second switch module 140 according to the pulse signal. Combined with the energy storage of the inductor module 110 and the capacitor module 120, power control is achieved. The control module is used to adjust the duty cycle of the pulse signal according to the power supply terminal, and to control the working state of the second switch module 140 according to the pulse signal.

[0056] Specifically, in this embodiment, the power supply energy is the energy provided by the power supply terminal P+. The control module adjusts the duty cycle of the pulse signal according to the power supply energy, and outputs a pulse signal at a preset fixed frequency based on the adjusted duty cycle, as the first switch control signal S1 or the second switch control signal S1, thereby controlling the heating input power through the first switch transistor or the second switch transistor.

[0057] For example, when both the first switch module 130 and the second switch module 140 are implemented using a single switch device, such as Figure 3As shown, when the battery heating is activated, a continuous high-level signal can be sent by the control module as the first switch control signal S1, which is transmitted to the control terminal of the first switching transistor SW1. This first switch control signal S1 controls the first switching transistor SW1 to remain closed. Furthermore, the control module can send a pulse signal with a fixed frequency and fixed duty cycle as the second switch control signal S2, which is transmitted to the control terminal of the second switching transistor SW2. This pulse signal controls the opening and closing of the second switching transistor SW2. When the second switching transistor SW2 is activated (i.e., when it is closed and conducting), the power supply terminal P+ of the battery heating circuit and the first inductor L1... The first switching transistor SW1, the heating film, the second switching transistor SW2, and the reference ground of the battery heating circuit form a power supply loop. When the heating film is working normally, it heats the battery and can charge the first capacitor C1 through the power supply terminal P+. When the second switching transistor SW2 is off, i.e., when the second switching transistor SW2 is open, no power supply loop is formed, and the heating film does not work. In this way, by controlling the second switching transistor SW2 to open and close continuously through pulse signals, the power is controlled, thereby realizing a power-controllable battery heating method and solving the problem of poor user experience caused by the inability to heat the battery in certain scenarios in existing related technologies.

[0058] In a specific implementation, the battery heating circuit provided in this application embodiment can be applied to a battery heating system, so that the battery heating system can control the first switch module 130 through the first switch control signal S1 and control the second switch module 140 through the second switch control signal S2. The first switch control signal S1 or the second switch control signal S2 is a pulse signal, so as to control the heating input power of the battery heating module 150 through the pulse signal and the energy stored in the first inductor L1 and the first capacitor C1, thereby realizing a power-controllable battery heating method, thus solving the problem in the prior art that battery heating cannot be performed in specific scenarios where the power supply voltage is unstable and the power is low.

[0059] like Figure 4 As shown, this application provides a battery heating system 400, which includes a battery heating circuit 410. The battery heating circuit 410 can be any of the battery heating circuits described in the above embodiments of this application. The battery heating system 400 can control the heating input power through pulse signals and the energy storage of the inductor module and capacitor module, thereby realizing a power-controllable battery heating method. This solves the problem in the prior art that battery heating cannot be performed in specific scenarios where the power supply voltage is unstable and the power is low, thereby effectively improving the reliability of battery products and user experience.

[0060] like Figure 5 As shown, this application embodiment also provides a battery module 510, which includes the battery heating system 400 in any of the above embodiments. The battery module 510 can control the first switch module 130 through the first switch control signal S1 and control the second switch module 140 through the second switch control signal S2. The first switch control signal S1 or the second switch control signal S2 is a pulse signal. The heating input power of the battery heating module 150 is controlled by the pulse signal and the energy stored in the inductor module and capacitor module. This achieves a power-controllable battery heating method, thereby solving the problem in the prior art that the battery cannot be heated in specific scenarios where the power supply voltage is unstable and the power is low. This can effectively improve the reliability of battery products and user experience.

[0061] The system and battery module embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0062] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general-purpose hardware platform, or of course by hardware.

[0063] Based on this understanding, the above technical solutions, or the parts that contribute to the relevant technologies, can be embodied in the form of software products. These computer software products can be stored in computer-readable storage media, such as ROM / RAM, magnetic disks, optical disks, etc., and include several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments.

[0064] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0065] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A battery heating circuit, characterized in that, include: Inductor module, capacitor module, first switch module, second switch module, and battery heating module; The first terminal of the first switch module, the second terminal of the inductor module, and the first terminal of the capacitor module are electrically connected. The second terminal of the first switch module is electrically connected to the first terminal of the battery heating module. The second terminal of the battery heating module is electrically connected to the first terminal of the second switch module. The second terminal of the second switch module and the second terminal of the capacitor module are both electrically connected to the reference ground of the battery heating circuit. The first terminal of the inductor module is electrically connected to the power supply terminal of the battery heating circuit. The control terminal of the first switch module is used to receive a first switch control signal, and the control terminal of the second switch module is used to receive a second switch control signal. The first switch control signal or the second switch control signal is a pulse signal, and the pulse signal is used to control the heating input power of the battery heating module.

2. The battery heating circuit according to claim 1, characterized in that, The inductor module includes: a protection device and a first inductor; The first end of the first inductor is electrically connected to the power supply terminal through the protection device, and the second end of the first inductor, the first end of the first switch module, and the first end of the capacitor module are electrically connected.

3. The battery heating circuit according to claim 2, characterized in that, The protection device includes a fuse; The first end of the fuse is electrically connected to the power supply terminal, and the second end of the fuse is electrically connected to the first end of the first inductor.

4. The battery heating circuit according to claim 1, characterized in that, The capacitor module includes a first capacitor; The first terminal of the first capacitor, the first terminal of the first switching module, and the second terminal of the inductor module are electrically connected, and the second terminal of the first capacitor is electrically connected to the reference ground.

5. The battery heating circuit according to claim 1, characterized in that, The first switching module includes a first switching transistor; The first terminal of the first switching transistor, the second terminal of the inductor module, and the first terminal of the capacitor module are electrically connected. The second terminal of the first switching transistor is electrically connected to the first terminal of the battery heating module. The control terminal of the first switching transistor serves as the control terminal of the first switching module. The first switching control signal is specifically used to control the first switching transistor.

6. The battery heating circuit according to claim 1, characterized in that, The second switching module includes a second switching transistor; The first terminal of the second switching transistor is electrically connected to the second terminal of the battery heating module, the second terminal of the second switching transistor is electrically connected to the reference ground, the control terminal of the second switching transistor serves as the control terminal of the second switching module, and the second switching control signal is specifically used to control the second switching transistor.

7. The battery heating circuit according to claim 1, characterized in that, The battery heating module includes a heating film; The first end of the heating film is electrically connected to the second end of the first switch module, and the second end of the heating film is electrically connected to the first end of the second switch module.

8. The battery heating circuit according to any one of claims 1 to 7, characterized in that, It also includes a control module; The heating control signal terminal of the control module is electrically connected to the control terminal of the first switch module, and the heating control signal terminal is used to output the first switch control signal. The power control signal terminal of the control module is electrically connected to the control terminal of the second switch module, and the power control signal terminal is used to output the second switch control signal. The sampling signal terminal of the control module is electrically connected to the power supply terminal, and the sampling signal terminal is used to sample the electrical energy of the power supply terminal. The control module is used to adjust the duty cycle of the pulse signal according to the electrical energy at the power supply terminal.

9. A battery heating system, characterized in that, It includes a battery heating circuit as described in any one of claims 1 to 8.

10. A battery module, characterized in that, It includes the battery heating system as described in claim 9.

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