Lithium battery power supply system for direct current induction cooker and direct current induction cooker

Abstract

The utility model relates to a lithium battery power supply system for a direct-current induction cooker and the direct-current induction cooker. The lithium battery power supply system for the direct-current induction cooker comprises a lithium battery pack, a BMS (Battery Management System) module, a control module, two half-bridge driving modules, a pre-stage boosting module and a post-stage full-bridge phase-shift resonance module. According to the utility model, the two half-bridge driving modules are controlled by the control module to generate PWM signals to respectively control the pre-stage boost circuit and the post-stage phase-shifted full-bridge resonance module, and the pre-stage boost circuit raises a relatively low voltage of the lithium battery pack to a required target voltage and supplies the target voltage to the post-stage phase-shifted full-bridge resonance module. An electromagnetic coil of the rear-stage phase-shifted full-bridge resonance module generates high-frequency oscillation current, high-frequency electromagnetic wave energy is formed, large eddy current is generated, and therefore a large amount of heat is generated.

Description

Technical Field

[0001] This utility model relates to the technical field of power supply systems for induction cookers, and in particular to a lithium battery power supply system for a DC induction cooker and a DC induction cooker. Background Technology

[0002] An induction cooker is a common household appliance, widely used in daily life due to its advantages such as fast heating, convenience, cleanliness, and energy efficiency. Traditional induction cookers operate on the principle of electromagnetic induction heating. They mainly consist of a high-frequency induction heating coil, a high-frequency power conversion device, a controller, and a pot with a ferromagnetic bottom. An alternating current is passed through the heating coil, generating an alternating magnetic field. Most of the magnetic field lines pass through the metal pot, generating numerous eddy currents in the bottom of the pot, thus producing the heat needed for cooking.

[0003] Induction cookers, due to their high power, are generally powered by mains electricity, making them unsuitable for outdoor camping, wilderness rescue, and other similar scenarios. Currently, outdoor DC induction cookers, due to their excessive power and lack of adjustable power settings, require a relatively high DC voltage, necessitating more lithium batteries and resulting in bulky batteries that are inconvenient for outdoor transport. Utility Model Content

[0004] Based on this, and addressing the technical problem that current induction cookers require more lithium batteries, making the batteries too bulky and unsuitable for outdoor use, this utility model provides a lithium battery power supply system for DC induction cookers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model first provides a lithium battery power supply system for a DC induction cooker, which includes a lithium battery pack, a BMS module, a control module, two half-bridge drive modules, a front-stage boost module, and a rear-stage full-bridge phase-shifting resonant module; the control module is connected to the two half-bridge drive modules, the two half-bridge drive modules are respectively connected to the front-stage boost module and the rear-stage full-bridge phase-shifting resonant module, the front-stage boost module is connected to the BMS module and the rear-stage full-bridge phase-shifting resonant module, and the BMS module is connected to the lithium battery pack.

[0007] This invention controls two half-bridge drive modules through a control module. The two half-bridge drive modules generate PWM signals to control the front-stage boost circuit and the rear-stage phase-shifted full-bridge resonant module, respectively. The front-stage boost circuit raises the relatively low voltage of the lithium battery pack to the required target voltage and supplies it to the rear-stage phase-shifted full-bridge resonant module. The rear-stage phase-shifted full-bridge resonant module and the electromagnetic coil generate a high-frequency oscillating current, forming high-frequency electromagnetic wave energy and generating a relatively large eddy current, thereby generating a large amount of heat. When used in a DC induction cooker, it enables the DC induction cooker to heat food.

[0008] As a further improvement of the above-mentioned solution of this utility model, the front-end boost module includes MOSFET Q1, MOSFET Q4, and boost inductor L1; the gate of MOSFET Q1 and the gate of MOSFET Q4 are both connected to the control module, the drain of MOSFET Q1 is connected to the source of MOSFET Q4, the source of MOSFET Q1 and the drain of MOSFET Q4 are both connected to boost inductor L1, and the source of MOSFET Q4 and boost inductor L1 are respectively connected to the J1 terminal of the BMS module; the control module outputs two complementary control signals PWM1H and PWM1L as inputs to MOSFET Q1 and MOSFET Q4, respectively.

[0009] As a further improvement of the above-mentioned solution of this utility model, the pre-amplifier boost module also includes capacitors E1 and E2; the drain of MOSFET Q1 is connected to the source of MOSFET Q4 through capacitor E1, and both ends of capacitor E2 are connected to the J1 terminal of the BMS module.

[0010] As a further improvement to the above-mentioned solution of this utility model, the subsequent full-bridge phase-shifting resonant module includes MOSFETs Q2, Q3, Q5, and Q6, an electromagnetic coil J2, and a resonant capacitor C1. The gates of MOSFETs Q2, Q3, Q5, and Q6 are all connected to the control module. The source of MOSFET Q2 and the drain of MOSFET Q5 are connected to one end of the electromagnetic coil J2. The source of MOSFET Q3 and the drain of MOSFET Q6 are connected to the other end of the electromagnetic coil J2 through the resonant capacitor C1. The drain of MOSFET Q2 is connected to the drain of MOSFET Q3, and the source of MOSFET Q5 is connected to the source of MOSFET Q6. The control module outputs two complementary control signals PWM2H and PWM2L as inputs to MOSFETs Q2 and Q5, respectively, and two complementary control signals PWM3H and PWM3L as inputs to MOSFETs Q3 and Q6, respectively.

[0011] As a further improvement to the above-mentioned solution of this utility model, the half-bridge driver module adopts a half-bridge driver IC.

[0012] As a further improvement to the above-mentioned solution of this utility model, the control module adopts an MCU with PWM function.

[0013] As a further improvement to the above-described solution of this utility model, the lithium battery power supply system for the DC induction cooker also includes a human-machine interface module, which is bidirectionally connected to the control module. The required power or temperature can be set through the human-machine interface module. Preferably, the human-machine interface module includes buttons and a display unit.

[0014] As a further improvement to the above-mentioned solution of this utility model, the lithium battery pack includes 4 strings of lithium batteries, which are connected in series to form a power supply of 9V-12.8V.

[0015] This utility model also provides a DC induction cooker, which includes the lithium battery power supply system for DC induction cookers as described above.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention controls two half-bridge drive modules through a control module. The two half-bridge drive modules generate PWM signals to control the front-stage boost circuit and the rear-stage phase-shifted full-bridge resonant module, respectively. The front-stage boost circuit raises the relatively low voltage of the lithium battery pack to the required target voltage and supplies it to the rear-stage phase-shifted full-bridge resonant module. The electromagnetic coil J2 of the rear-stage phase-shifted full-bridge resonant module generates a high-frequency oscillating current, forming high-frequency electromagnetic wave energy and generating a relatively large eddy current, thereby generating a large amount of heat. When used in a DC induction cooker, it enables the DC induction cooker to achieve the purpose of heating food.

[0018] The power supply system of this invention features a front-stage boost module battery, providing a wide power supply voltage range. It can use a smaller number of lithium batteries in series, allowing power to a DC induction cooker with a minimum of four batteries in series. This significantly reduces the size of the power supply system, making it easy to carry and move. Furthermore, since the voltage of the front-stage boost module determines the energy of the subsequent phase-shifting full-bridge resonant module, it offers two-stage adjustment, allowing for a wide range of adjustment of the induction cooker's output power. The output power can be adjusted down to a minimum of 1W to meet various usage requirements. This invention is simple in structure, reliable in operation, and flexible in use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection of each module in a lithium battery power supply system for a DC induction cooker, as proposed in an embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of the front-stage boost module in a lithium battery power supply system for a DC induction cooker, as proposed in an embodiment of this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of a full-bridge phase-shifting resonant module in a lithium battery power supply system for a DC induction cooker, as proposed in an embodiment of this utility model. Detailed Implementation

[0022] To facilitate understanding of this invention, a more comprehensive description of the invention will be provided below with reference to specific embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Reference Figure 1 This embodiment proposes a lithium battery power supply system for a DC induction cooker, which includes a lithium battery pack, a BMS module, a control module, two half-bridge drive modules, a front-stage boost module, and a rear-stage full-bridge phase-shifting resonant module. It may also include a human-machine interaction module.

[0025] In this embodiment, combined with Figure 2 The front-end boost module includes MOSFETs Q1 and Q4, boost inductor L1, BMS module J1, capacitors E1 and E2. The drain of MOSFET Q1 is connected to the source of MOSFET Q4 through capacitor E1. The source of MOSFET Q1 and the drain of MOSFET Q4 are both connected to boost inductor L1. The source of MOSFET Q4 and boost inductor L1 are both connected to terminal J1 of the BMS module. Both ends of capacitor E2 are connected to terminal J1 of the BMS module.

[0026] The lithium battery pack is connected to the BMS module J1. In this embodiment, the lithium battery pack includes four lithium batteries connected in series to form a 12.8V power supply.

[0027] In this embodiment, combined with Figure 3 The subsequent full-bridge phase-shifting resonant module includes MOSFETs Q2, Q3, Q5, and Q6, an electromagnetic coil J2, and a resonant capacitor C1. The source of MOSFET Q2 and the drain of MOSFET Q5 are connected to one end of the electromagnetic coil J2. The source of MOSFET Q3 and the drain of MOSFET Q6 are connected to the other end of the electromagnetic coil J2 through the resonant capacitor C1. The drain of MOSFET Q2 is connected to the drain of MOSFET Q3, and the source of MOSFET Q5 is connected to the source of MOSFET Q6.

[0028] The human-machine interface module is bidirectionally connected to the control module. The human-machine interface module allows setting the desired power or temperature of the DC induction cooker. In this embodiment, the human-machine interface module includes buttons and a display unit. The control module is connected to two half-bridge driver modules. One half-bridge driver module is connected to the gates of MOSFETs Q1 and Q4. The control module controls the half-bridge driver module to output two complementary control signals, PWM1H and PWM1L, as inputs to MOSFETs Q1 and Q4, respectively. The other half-bridge driver module is connected to the gates of MOSFETs Q2, Q3, Q5, and Q6. The control module controls this half-bridge driver module to output two complementary control signals, PWM2H and PWM2L, as inputs to MOSFETs Q2 and Q5, respectively, and two complementary control signals, PWM3H and PWM3L, as inputs to MOSFETs Q3 and Q6, respectively. In this embodiment, the control module uses an MCU with PWM functionality, and the half-bridge driver module uses a half-bridge driver IC.

[0029] With the above structural setup, the control module controls the two half-bridge drive modules. The two half-bridge drive modules generate PWM signals to control the front-stage boost circuit and the rear-stage phase-shifted full-bridge resonant module, respectively. The front-stage boost circuit raises the relatively low voltage of the lithium battery pack to the required target voltage and supplies it to the rear-stage phase-shifted full-bridge resonant module. The electromagnetic coil J2 of the rear-stage phase-shifted full-bridge resonant module generates a high-frequency oscillating current, forming high-frequency electromagnetic wave energy and generating a relatively large eddy current, thereby generating a large amount of heat. When used in a DC induction cooker, this enables the DC induction cooker to heat food.

[0030] This embodiment features a pre-stage boost module battery, providing a wide power supply voltage range. It can use a smaller number of lithium batteries in series, allowing for a minimum of four batteries to power a DC induction cooker. This significantly reduces the size of the power supply system, making it easy to carry and move. Furthermore, since the voltage of the pre-stage boost module determines the energy of the subsequent phase-shifting full-bridge resonant module, it offers two-stage adjustment, allowing for a wide range of adjustment of the induction cooker's output power. Therefore, the output power can be adjusted down to a minimum of 1W to meet different usage requirements.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A lithium battery power supply system for a DC induction cooker, characterized in that, It includes a lithium battery pack, a BMS module, a control module, two half-bridge drive modules, a front-stage boost module, and a rear-stage full-bridge phase-shifting resonant module. The control module is connected to the two half-bridge drive modules, which are respectively connected to the front-stage boost module and the rear-stage full-bridge phase-shifting resonant module. The front-stage boost module is connected to the BMS module and the rear-stage full-bridge phase-shifting resonant module, and the BMS module is connected to the lithium battery pack.

2. The lithium battery power supply system for a DC induction cooker according to claim 1, characterized in that, The preamp boost module includes MOSFETs Q1 and Q4, and boost inductor L1. The gates of MOSFETs Q1 and Q4 are connected to the control module. The drain of MOSFET Q1 is connected to the source of MOSFET Q4. The source of MOSFET Q1 and the drain of MOSFET Q4 are connected to boost inductor L1. The source of MOSFET Q4 and boost inductor L1 are connected to the J1 terminal of the BMS module. The control module outputs two complementary control signals, PWM1H and PWM1L, as inputs to MOSFETs Q1 and Q4, respectively.

3. The lithium battery power supply system for a DC induction cooker according to claim 2, characterized in that, The preamp boost module also includes capacitors E1 and E2; the drain of MOSFET Q1 is connected to the source of MOSFET Q4 through capacitor E1, and both ends of capacitor E2 are connected to the J1 terminal of the BMS module.

4. The lithium battery power supply system for a DC induction cooker according to claim 1, characterized in that, The subsequent full-bridge phase-shift resonant module includes MOSFETs Q2, Q3, Q5, and Q6, an electromagnetic coil J2, and a resonant capacitor C1. The gates of MOSFETs Q2, Q3, Q5, and Q6 are all connected to the control module. The source of MOSFET Q2 and the drain of MOSFET Q5 are connected to one end of the electromagnetic coil J2. The source of MOSFET Q3 and the drain of MOSFET Q6 are connected to the other end of the electromagnetic coil J2 through the resonant capacitor C1. The drain of MOSFET Q2 is connected to the drain of MOSFET Q3, and the source of MOSFET Q5 is connected to the source of MOSFET Q6. The control module outputs two complementary control signals, PWM2H and PWM2L, as inputs to MOSFETs Q2 and Q5, respectively, and two complementary control signals, PWM3H and PWM3L, as inputs to MOSFETs Q3 and Q6, respectively.

5. The lithium battery power supply system for a DC induction cooker according to claim 1, characterized in that, The half-bridge driver module uses a half-bridge driver IC.

6. The lithium battery power supply system for a DC induction cooker according to claim 1, characterized in that, The control module uses an MCU with PWM functionality.

7. The lithium battery power supply system for a DC induction cooker according to claim 1, characterized in that, The lithium battery power supply system for the DC induction cooker also includes a human-machine interaction module, which is bidirectionally connected to the control module.

8. The lithium battery power supply system for a DC induction cooker according to claim 1, characterized in that, The lithium battery pack consists of four lithium batteries connected in series to provide a 9V-12.8V power supply.

9. A DC induction cooker, characterized in that, It includes a lithium battery power supply system for a DC induction cooker as described in any one of claims 1-8.

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