Battery heating circuits, systems, and battery modules

Abstract

This invention provides a battery heating circuit, system, and battery module that control heating input power and energy storage using pulse signals, thereby realizing a power-controllable battery heating method. [Solution] The battery heating circuit includes an inductance module 110, a capacitor module 120, a first switching module 130, a second switching module 140, and a battery heating module 150, the first of which is electrically connected to the power supply terminal P+. The first switching module is controlled by a first switching control signal S1, and the second switching module is controlled by a second switching control signal S2. The first or second switching control signal is a pulse signal, and the heating input power of the battery heating module is controlled by the pulse signal and the energy storage of the inductance module and capacitor module, thereby realizing a battery heating system with controllable power.

Description

【Technical Field】 【0001】 This application relates to the field of battery technology, and in particular, to a battery heating circuit, a system, and a battery module. 【Background Art】 【0002】 With the rapid development of energy storage technology, battery technology has also been constantly improving, and the application of batteries has become increasingly widespread. 【0003】 In a low-temperature environment, the chemical performance of the battery rapidly deteriorates, and the performance of the battery is restricted. To improve the overall performance of the battery under low-temperature conditions, usually, the battery is heated by a heating film. 【0004】 However, when an outdoor energy storage device is charged using a solar power generation panel, when the temperature is low and the sunlight is weak under cloudy conditions, for example, in the early morning or evening, it is necessary to charge after the battery pack reaches a certain temperature. In such cases, there is a possibility that charging cannot be performed, resulting in a poor user experience. 【Summary of the Invention】 【0005】 In view of this, this application provides a battery heating circuit, a system, and a battery module for solving the technical problem in the prior art that battery heating cannot be normally performed when the voltage of the power supply is unstable and the power is small. 【0006】 In a first aspect, an embodiment of this application provides a battery heating circuit. This battery heating circuit includes an inductance module, a capacitor module, a first switching module, a second switching module, and a battery heating module. Here, the first end of the first switching module, the second end of the inductance module, and the first end of the capacitor module are electrically connected, the second end of the first switching module is electrically connected to the first end of the battery heating module, the second end of the battery heating module is electrically connected to the first end of the second switching module, both the second end of the second switching module and the second end of the capacitor module are electrically connected to the reference ground of the battery heating circuit, and the first end of the inductance module is electrically connected to the power supply end of the battery heating circuit. The control terminal of the first switching module is used to receive a first switching control signal, and the control terminal of the second switching module is used to receive a second switching control signal. The first switching control signal or the second switching control signal is a pulse signal, and the pulse signal is used to control the heating input power of the battery heating module. 【0007】 Preferably, the inductance module includes a protective device and a first inductance. The first end of the first inductance is electrically connected to the power supply end via the protection device, and the second end of the first inductance, the first end of the first switching module, and the first end of the capacitor module are electrically connected. 【0008】 Preferably, the protective 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 inductance. 【0009】 Preferably, 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 inductance module are electrically connected, and the second terminal of the first capacitor is electrically connected to the reference ground. 【0010】 Preferably, the first switching module includes a first switching transistor. The first terminal of the first switching transistor, the second terminal of the inductance 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 is the control terminal of the first switching module, and the first switching control signal is used specifically to control the first switching transistor. 【0011】 Preferably, 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 is the control terminal of the second switching module, and the second switching control signal is specifically used to control the second switching transistor. 【0012】 Preferably, 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 switching module, and the second end of the heating film is electrically connected to the first end of the second switching module. 【0013】 Preferably, the battery heating circuit further includes a control module. The heating control signal terminal of the control module is electrically connected to the control terminal of the first switching module, and the heating control signal terminal is used to output the first switching control signal; the power control signal terminal of the control module is electrically connected to the control terminal of the second switching module, and the power control signal terminal is used to output the second switching 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 based on the electrical energy at the power supply terminal. 【0014】 In a second embodiment, the embodiment of the present application provides a battery heating system including a battery heating circuit as described in any one of the first embodiments of the present application. 【0015】 In a third embodiment, an embodiment of the present application provides a battery module including the battery heating system described in the second embodiment of the present application. 【0016】 The battery heating circuit, system, and battery module according to the embodiment of the present application include an inductance module, a capacitor module, a first switching module, a second switching module, and a battery heating module. The first end of the first switching module, the second end of the inductance module, and the first end of the capacitor module are electrically connected. The second end of the first switching module is electrically connected to the first end of the battery heating module, and the second end of the battery heating module is electrically connected to the first end of the second switching module. Both the second end of the second switching module and the second end of the capacitor module are electrically connected to the reference ground of the battery heating circuit. The first end of the inductance module is electrically connected to the power supply end of the battery heating circuit. The control end of the first switching module is used to receive a first switching control signal and controls the first switching module by the first switching control signal. The control end of the second switching module is used to receive a second switching control signal and controls the second switching module by the second switching control signal. The first switching control signal or the second switching control signal is a pulse signal. By controlling the heating input power of the battery heating module using pulse signals and energy storage in the inductance module and capacitor module, a power-controllable battery heating method is realized. This solves the problem of poor user experience in conventional technology due to the inability to perform battery heating under certain conditions, and effectively improves the reliability and user satisfaction of battery products. [Brief explanation of the drawing] 【0017】 The drawings shown herein are incorporated into the specification and constitute part of this specification, illustrating embodiments conforming to the present invention and are used together with the specification to illustrate the principles of the present invention. To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings that may be used in describing the embodiments or the prior art. It will be obvious to those skilled in the art that other drawings can be derived from these drawings without any creative effort. One or more embodiments are illustrated by corresponding figures in the drawings. These illustrative descriptions are not limiting to the embodiments. Elements having the same reference numeral in the drawings are shown as similar elements. Unless otherwise specified, figures in the drawings do not indicate proportional relationships. [Figure 1] This is a structural block diagram of a battery heating circuit according to an embodiment of the present invention. [Figure 2] This is a schematic diagram of the structure of a battery heating circuit according to a preferred embodiment of the present invention. [Figure 3] This is a schematic diagram illustrating the circuit principle of a battery heating circuit according to an example of the present invention. [Figure 4] This is a schematic diagram of the structure of a battery heating system according to an embodiment of the present invention. [Figure 5] This is a schematic diagram of the structure of a battery module according to an embodiment of the present invention. [Modes for carrying out the invention] 【0018】 To further clarify the purpose, technical solutions, and advantages of the embodiments of this application, the technical solutions of the embodiments of this application will be described clearly and completely below with reference to the drawings of the embodiments. Clearly, the embodiments described herein are only some, not all, embodiments of this application. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of this application are all within the scope of protection of this application. 【0019】 The following disclosure provides numerous examples or instances for implementing different structures of the present invention. In the following, for the sake of simplifying the disclosure of the present invention, members and arrangements of specific examples will be described. Of course, these are merely examples and do not limit the present invention. Also, the present invention may repeatedly use reference numbers and / or letters in different examples, but this repetition is for the purpose of simplifying and clarifying the description and does not itself indicate the relationship between various examples and / or arrangements being discussed. 【0020】 In order to solve the problem that the heating device cannot be used for battery heating under specific circumstances where the voltage supplied from the power source is unstable and the power is small in the prior art, the embodiments of the present application provide a battery heating circuit, a system, and a battery module including an inductance module, a capacitor module, a first switching module, a second switching module, and a battery heating module. The first switching module is controlled by a first switching control signal, and the second switching module is controlled by a second switching control signal. The first switching control signal or the second switching control signal is a pulse signal, and the heating input power of the battery heating module and the energy storage of the inductance module and the capacitor module are controlled by the pulse signal, thereby realizing a battery heating method with controllable power. 【0021】 FIG. 1 is a structural block diagram of a battery heating circuit of a controller according to an embodiment of the present application. As shown in FIG. 1, the battery heating circuit according to the embodiment of the present application specifically includes an inductance module 110, a capacitor module 120, a first switching module 130, a second switching module 140, and a battery heating module 150. Here, a first end of the first switching module 130, a second end of the inductance module 110, and a first end of the capacitor module 120 are electrically connected. A second end of the first switching module 130 is electrically connected to a first end of the battery heating module 150, and a second end of the battery heating module 150 is electrically connected to a first end of the second switching module 140. A second end of the second switching module 140 and a second end of the capacitor module 120 are both electrically connected to a reference ground of the battery heating circuit, and a first end of the inductance module 110 is electrically connected to a power supply terminal P+ of the battery heating circuit. A control end of the first switching module 130 is used to receive a first switching control signal S1 and control the first switching module 130 according to the first switching control signal S1. A control end of the second switching module 140 is used to receive a second switching control signal S2 and control the second switching module 140 according to the second switching control signal S2. Also, the first switching control signal S1 or the second switching control signal S2 is a pulse signal, and the pulse signal is used to control the heating input power of the battery heating module 150 and the energy storage of the inductance module and the capacitor module, so as to realize a battery heating method with controllable power. 【0022】 In the embodiments of this invention, a pulse signal is used to control the heating input power of the battery heating module 150. For example, the pulse signal can output a pulsed square wave signal based on the power supply energy. The pulsed square wave signal is used as a power control signal, and the duty cycle of the power control signal can be adjusted based on the magnitude of the power supply energy. For example, if the power energy of the power source is the amount of charge provided by a solar power generation panel, the duty cycle of a fixed-frequency square wave signal can be adjusted based on the strength of the solar power generation. The pulse signal generated after adjustment is transmitted as a power control signal to the control terminal of the first switching module 130 or the control terminal of the second switching control module, and the pulse signal can further control the on / off state of the first switching module 130 or the second switching module 140. By continuously switching on and off, the objective of controlling the heating input power can be achieved, and furthermore, the problem in the prior art of not being able to perform battery heating under certain circumstances where the power supply voltage is unstable and the power is low can be solved, thereby effectively improving the reliability of the battery product and the user experience. 【0023】 As described above, in the battery heating circuit according to the embodiment of the present application, the first terminal of the first switching module 130, the second terminal of the inductance module 110, and the first terminal of the capacitor module 120 are electrically connected. The second terminal of the first switching 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 switching module 140. Both the second terminal of the second switching module 140 and the second terminal of the capacitor module 120 are electrically connected to the reference ground of the battery heating circuit. The first terminal of the inductance module 110 is electrically connected to the power supply terminal P+ of the battery heating circuit. The first switching module 130 is controlled by the first switching control signal S1, and the second switching module 140 is controlled by the second switching control signal S2. Furthermore, the first switching control signal S1 or the second switching control signal S2 is a pulse signal, and by controlling the heating input power of the battery heating module 150 and the energy storage of the inductance module 110 and capacitor module 120 with the pulse signal, a power-controllable battery heating method is realized. This solves the problem of poor user experience due to the inability to perform battery heating under certain conditions in conventional technology, and effectively improves the reliability and user satisfaction of battery products. 【0024】 In a concrete implementation, the power supply terminal P+ of the battery heating circuit may be electrically connected to the power supply interface of the battery pack. The reference ground of the battery heating circuit may be electrically connected to the discharge interface P- of the battery pack. For example, the power supply terminal P+ may be the power supply terminal of a solar panel, and the battery can be charged using the electrical energy provided by the solar panel as a power source. 【0025】 For example, when turning on battery heating, a microcontroller unit (MCU) transmits a single continuous high-level signal as a first switching control signal S1 to the control terminal of the first switching module 130, and the first switching control signal S1 can control the first switching module 130 to an ON conduction state. In addition, the MCU can transmit a single fixed-frequency, fixed-duty-ratio pulsed square wave signal as a second switching control signal S2 to the control terminal of the second switching module 140. As shown in Figure 2, the operating state of the second switching module 140 is controlled by the pulsed square wave signal, and when the operating state of the second switching module 140 is controlled to an ON conduction state by the pulsed square wave signal, the second switching module 140 becomes conductive. At this time, the power supply terminal P+ of the battery heating circuit, the inductance module 110, the first switching module 130, the battery heating module 150, the second switching module 140, and the reference ground of the battery heating circuit form a power supply circuit, allowing the battery heating module 150 to operate normally, heat the battery, and charge the capacitor module 120 with the electrical energy supplied from the power supply terminal P+. When the operating state of the second switching module 140 is controlled to an off-cut state by a pulsed square wave signal, the second switching module 140 is shut off. At this time, a power supply circuit is not formed, and the battery heating module 150 stops heating. That is, the battery heating module 150 does not operate. In this way, by controlling the continuous conduction interruption of the second switching module 140 and the energy storage of the inductance module 110 and the capacitor module 120 with a pulsed square wave signal, the effect of controlling power can be achieved. This enables a battery heating method with controllable power, and further solves the problem of poor user experience due to the inability to perform battery heating under certain conditions in conventional technology, thereby effectively improving the reliability and user satisfaction of battery products. 【0026】 Of course, in the embodiment of the present application, power control can be realized in ways other than using a pulsed square wave signal as the second switching control signal S2 and implementing the power control method by the second switching module 140. For example, power control may be realized using a pulsed square wave signal as the first control signal and implementing the power control method by the first switching module 130, and the embodiment of the present application is not limited to this. 【0027】 As an example of this invention, when power control is realized by the first switching module 130, when the battery heating is turned on, a single continuous high-level signal can be provided by a microcontroller unit (MCU) as a second switching control signal S2. This signal is transmitted to the control terminal of the second switching module 140, and the second switching control signal S2 controls the second switching module 140 to an ON conduction state. Alternatively, the MCU can transmit a single fixed-frequency, fixed-duty-ratio pulsed square wave signal as a first switching control signal S1 and transmit it to the control terminal of the first switching module 130. The pulsed square wave signal controls the operating state of the first switching module 130, and when the pulsed square wave signal controls the operating state of the first switching module 130 to an ON conduction state, the first switching module 130 becomes conductive. At this time, the power supply terminal P+ of the battery heating circuit, the inductance module 110, the first switching module 130, the battery heating module 150, the second switching module 140, and the reference ground of the battery heating circuit form a power supply circuit, and the battery heating module 150 operates normally to heat the battery and can charge the capacitor module 120 with electrical energy supplied from the power supply terminal P+. When the operating state of the first switching module 130 is controlled to an off-cut state by a pulsed square wave signal, the first switching module 130 is cut off. At this time, a power supply circuit is not formed, and the battery heating module 150 stops heating. That is, the battery heating module 150 does not operate. In this way, by controlling the continuous conduction interruption of the first switching module 130 and the energy storage of the inductance module 110 and the capacitor module 120 by a pulsed square wave signal, the effect of controlling power can be achieved. This enables a power-controllable battery heating method, and further solves the problem of poor user experience caused by the inability to perform battery heating under certain conditions in conventional technology, thereby effectively improving the reliability and user satisfaction of battery products. 【0028】 In some preferred embodiments of the present application, the inductance module 110 may include a protection device 111 and a first inductance L1. As shown in Figure 2, the first end of the first inductance L1 is electrically connected to the power supply terminal P+ via the protection device 111. The second end of the first inductance L1, the first end of the first switching module 130, and the first end of the capacitor module 120 are electrically connected. This allows the protection device 111 to prevent problems such as ignition and explosion due to short circuits in the circuit, thereby achieving current protection. The protection device 111 may include, but is not limited to, a fuse, and may be any other device having a protective function, and is not limited thereto. 【0029】 For example, as shown in Figure 3, if the protection device includes a fuse F1, the first end of the fuse F1 is electrically connected to the power supply terminal P+, and the second end of the fuse F1 is electrically connected to the first end of the first inductance L1. This allows the fuse F1 to provide short-circuit protection, effectively preventing the risk of fire and explosion due to a short circuit. 【0030】 In the embodiments of the present application, the capacitor module 120 can filter ripple current in the circuit and provide a filtering voltage stabilization effect. Preferably, the capacitor module 120 in the embodiments of the present application includes one or more capacitors. As shown in Figure 3, taking one 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 inductance 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, the multiple capacitors are connected in parallel, so that the battery heating circuit can filter ripple current with the first capacitor C1 and realize a filtering voltage stabilization function. Here, the inductance module 110 includes a first inductance L1, and the filtering voltage stabilization is achieved by the first inductance L1. 【0031】 In concrete implementation, the functions of the first switching module 130 in the embodiment of this application can be realized by employing one or more switching devices. For example, the functions of the first switching module 130 in the embodiment of this application can be realized by a single switching device, and the embodiment of this application is not specifically limited to this. 【0032】 In some preferred embodiments of the present invention, the first switching module 130 may include a first switching transistor SW1. The first terminal of the first switching transistor SW1, the second terminal of the inductance module 110, and the first terminal of the capacitor module 120 are electrically connected. The second terminal of the first switching transistor SW1 is electrically connected to the first terminal of the battery heating module 150. The control terminal of the first switching transistor SW1, as the control terminal of the first switching module 130, can control the first switching transistor SW1 by a first switching control signal S1. For example, if the first switching control signal S1 is a normally open / normally closed signal transmitted by the MCU, the first switching control signal S1 can control the first switching transistor SW1 to be always on. The first switching transistor SW1 is turned on and conducts electrical energy supplied from the power supply terminal P+ is transmitted to the battery heating module 150 by the conducted first switching transistor SW1. Power is supplied to the battery heating module 150 to ensure that the battery heating module 150 can operate normally. 【0033】 In concrete implementation, the functions of the second switching module 140 in the embodiment of this application can be realized using one or more second switching transistors SW2. For example, the functions of the second switching module 140 in the embodiment of this application can be realized using one second switching transistor SW2, and the embodiment of this application is not specifically limited to this. 【0034】 In some preferred embodiments of the present invention, the second switching module 140 includes a second switching transistor SW2. The first terminal of the second switching transistor SW2 is electrically connected to the second terminal of the battery heating module 150. The second terminal of the second switching transistor SW2 is electrically connected to the reference ground. The control terminal of the second switching transistor SW2, as the control terminal of the second switching module 140, can control the second switching transistor SW2 by a second switching control signal S2. For example, if the second switching control signal S2 is a pulsed square wave signal transmitted by the MCU, the on / off switching of the second switching transistor SW2 can be controlled by the pulsed square wave signal. The second switching transistor SW2 continuously turns on and off based on the pulsed square wave signal, achieving the effect of controlling power. Furthermore, the heating input power can be controlled, solving the problem of conventional battery heating technology being difficult to use under nighttime conditions, allowing for rational energy distribution, and improving product reliability and user satisfaction. 【0035】 In some preferred embodiments of the present application, a battery heating film is used as the battery heating module 150 in the embodiments of the present application, and the heating function of the battery heating module 150 can be realized by the heating film. Preferably, the battery heating module 150 in the embodiments of the present application includes a heating film. The first end of the heating film is electrically connected to the second end of the first switching module 130, and the second end of the heating film is electrically connected to the first end of the second switching module 140. As a result, the battery heating circuit can heat the battery with the heating film and realize the battery heating function. 【0036】 Furthermore, the first switching transistor SW1 and the second switching transistor SW2 in the embodiments of the present application can both be implemented using, for example, metal-oxide-semiconductor field-effect transistors (MOSFETs), or using electronic switching devices such as bipolar transistors or relays, and the embodiments of the present application are not specifically limited to these. 【0037】 Of course, the battery heating circuit according to the embodiment of the present application may further include other functional modules, such as a control module and a battery, in addition to the inductance module 110, capacitor module 120, first switching module 130, second switching module 140, and battery heating module 150, and the embodiment of the present application is not limited thereto. 【0038】 Preferably, the battery heating circuit according to the embodiment of the present application further includes a control module (not shown). The control module is configured to adjust the duty cycle of a pulse signal based on the energy of the power supply terminal. Power control is achieved by adjusting the duty cycle of the pulse signal. For example, the sampling signal terminal of the control module is electrically connected to the power supply terminal and is configured to sample the electrical energy of the power supply terminal via the sampling signal terminal. The heating control signal terminal of the control module is electrically connected to the control terminal of the first switching module 130. The power control signal terminal of the control module is electrically connected to the control terminal of the second switching module 140. The heating control signal terminal is configured to output the first switching control signal S1. The power control signal terminal is configured to output the pulse signal and transmit the pulse signal to the second switching module 140 as a second switching control signal S2. That is, the power control signal terminal is configured to output the second switching control signal S2. The control module is configured to adjust the duty cycle of the pulse signal based on the electrical energy of the power supply terminal and to control the operating state of the second switching module 140 based on the pulse signal. Power control is achieved by combining the energy storage of the inductance module 110 and the capacitor module 120 described above. Here, the control module adjusts the duty cycle of the pulse signal based on the electrical energy at the power supply terminal and controls the operating state of the second switching module 140 based on the pulse signal. 【0039】 Specifically, in the embodiment of this application, the power supply energy is the energy supplied by the power supply terminal P+. The control module adjusts the duty cycle of the pulse signal based on the power supply energy. Based on the adjusted duty cycle, it outputs a pulse signal according to a preset fixed frequency. The heating input power can be further controlled by a first switching transistor or a second switching transistor as a first switching control signal S1 or a second switching control signal S2. 【0040】 For example, if both the first switching module 130 and the second switching module 140 are implemented using a single switching device, as shown in Figure 3, when the battery heating is turned on, the control module can transmit a single continuous high-level signal as the first switching control signal S1 to the control terminal of the first switching transistor SW1. The first switching control signal S1 controls the first switching transistor SW1 to always be on. The control module sends a pulse signal with a fixed frequency and fixed duty cycle and transmits it as the second switching control signal S2 to the control terminal of the second switching transistor SW2. The pulse signal can control the on / off state of the second switching transistor SW2. When the second switching transistor SW2 is turned on, that is, when the second switching transistor SW2 becomes on-conductive, at this time the power supply terminal P+ of the battery heating circuit, the first inductance 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 circuit. The heating film operates normally, heating the battery and charging the first capacitor C1 with the electrical energy supplied from the power supply terminal P+. When the second switching transistor SW2 is turned off, that is, when the second switching transistor SW2 is turned off, the power supply circuit is not formed, and the heating film does not operate. In this way, the second switching transistor SW2 is continuously controlled to be turned on and off by a pulse signal, achieving the effect of controlling the power. Furthermore, a power-controllable battery heating method is realized, solving the problem of poor user experience in conventional technology due to the inability to perform battery heating under certain conditions. 【0041】 In concrete implementation, the battery heating circuit according to the embodiment of the present application can be applied to a battery heating system. The battery heating system can control the first switching module 130 by a first switching control signal S1 and the second switching module 140 by a second switching control signal S2. Furthermore, the first switching control signal S1 or the second switching control signal S2 is a pulse signal, and the heating input power of the battery heating module 150 is controlled by the pulse signal and the energy storage of the first inductance L1 and the first capacitor C1. By realizing a battery heating method with controllable power, the problem of not being able to perform battery heating in certain situations where the power supply voltage is unstable and the power is low, as in the conventional technology, is solved. 【0042】 As shown in Figure 4, an embodiment of the present application provides a battery heating system 400, which includes a battery heating circuit 410. The battery heating circuit 410 may be a battery heating circuit described in any of the embodiments of the present application. The battery heating system 400 can control the heating input power by pulse signals and energy storage in the inductance module and capacitor module. This realizes a power-controllable battery heating method and solves the problem in the prior art of not being able to perform battery heating under certain conditions where the power supply voltage is unstable and the power is low. Furthermore, it can effectively improve the reliability of battery products and the user experience. 【0043】 As shown in Figure 5, an embodiment of the present invention further provides a battery module 510, which includes the battery heating system 400 in any of the above embodiments. The battery module 510 can control a first switching module 130 by a first switching control signal S1 and control a second switching module 140 by a second switching control signal S2. The first switching control signal S1 or the second switching 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 storage of the inductance module and capacitor module. By realizing a power-controllable battery heating method, the problem in the prior art of not being able to perform battery heating under certain conditions where the power supply voltage is unstable and the power is low can be solved, and the reliability of the battery product and the user experience can be effectively improved. 【0044】 The above-described system and battery module embodiments are merely illustrative. The units described as separating members may or may not be physically separated, and the members indicated as units may or may not be physical units. That is, they may be located in a single location or distributed across multiple network units. Depending on the actual needs, some or all of these modules can be selected to achieve the objectives of this embodiment. 【0045】 From the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software and a general-purpose hardware platform, or of course by hardware. 【0046】 Based on this understanding, the above technical solutions may be embodied in the form of a software product, either essentially or in part in relation to the technology, and the computer software product may be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and may include a plurality of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the method described in each embodiment or in part in the embodiment. 【0047】 It should be understood that the terms used herein are merely for the purpose of describing specific exemplary embodiments and are not intended to be limiting. Unless otherwise specified in the preceding or following text, the singular forms “one,” “one,” and “the foregoing” used in this specification may also indicate the inclusion of the plural form. The terms “include,” “contain,” “contain,” and “have” are inclusive and indicate the presence of a described feature, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The steps, processes, and operations of the methods described herein should not be construed as having to be performed in a specific order described or explained unless the order of execution is explicitly indicated. Furthermore, it should be understood that different or alternative steps may be used. 【0048】 The above description is merely a specific embodiment of the present invention, intended to enable those skilled in the art to understand or implement it. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not limited to these embodiments shown herein, but rather fits to the broadest extent that is consistent with the principles and novel features disclosed herein.

Claims

[Claim 1] A battery heating circuit, It includes an inductance module, a capacitor module, a first switching module, a second switching module, and a battery heating module. Here, the first end of the first switching module, the second end of the inductance module, and the first end of the capacitor module are electrically connected, the second end of the first switching module is electrically connected to the first end of the battery heating module, the second end of the battery heating module is electrically connected to the first end of the second switching module, both the second end of the second switching module and the second end of the capacitor module are electrically connected to the reference ground of the battery heating circuit, and the first end of the inductance module is electrically connected to the power supply end of the battery heating circuit. The control terminal of the first switching module is used to receive a first switching control signal, and the control terminal of the second switching module is used to receive a second switching control signal. The first switching control signal or the second switching control signal is a pulse signal, and the pulse signal is used to control the heating input power of the battery heating module. A battery heating circuit characterized by the following features. [Claim 2] The inductance module includes a protective device and a first inductance. The first end of the first inductance is electrically connected to the power supply end via the protection device, and the second end of the first inductance, the first end of the first switching module, and the first end of the capacitor module are electrically connected. The battery heating circuit according to feature 1. [Claim 3] The aforementioned 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 inductance. The battery heating circuit according to feature 2. [Claim 4] 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 inductance module are electrically connected, and the second terminal of the first capacitor is electrically connected to the reference ground. The battery heating circuit according to feature 1. [Claim 5] The first switching module includes a first switching transistor, The first terminal of the first switching transistor, the second terminal of the inductance 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 is the control terminal of the first switching module, and the first switching control signal is specifically used to control the first switching transistor. The battery heating circuit according to feature 1. [Claim 6] 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 is the control terminal of the second switching module, and the second switching control signal is specifically used to control the second switching transistor. The battery heating circuit according to feature 1. [Claim 7] 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 switching module, and the second end of the heating film is electrically connected to the first end of the second switching module. The battery heating circuit according to feature 1. [Claim 8] Further including a control module, The heating control signal terminal of the control module is electrically connected to the control terminal of the first switching module, and the heating control signal terminal is used to output the first switching control signal; the power control signal terminal of the control module is electrically connected to the control terminal of the second switching module, and the power control signal terminal is used to output the second switching 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 based on the electrical energy of the power supply terminal. The battery heating circuit according to feature 1. [Claim 9] A battery heating system characterized by including a battery heating circuit according to any one of claims 1 to 8. [Claim 10] A battery module characterized by including the battery heating system described in claim 9.

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