Gas ignition device supporting multiple batteries based on two-stage boosting

Abstract

The utility model provides a gas ignition device supporting multiple batteries based on two-stage boosting. The power supply supports a plurality of battery types, including a dry battery, a button battery and a lithium battery; the primary energy storage capacitor is connected with the power supply; the first booster circuit is connected with the first-stage energy storage capacitor and is used for boosting the voltage output by the power supply to intermediate voltage; the second-stage energy storage capacitor is connected with the output end of the first booster circuit; and the second booster circuit is connected with the second-stage energy storage capacitor and is used for boosting the intermediate voltage to ignition voltage. According to the scheme, the problems that an existing ignition device product does not support multiple battery types, the peak current is high, and transportation is inconvenient can be solved.

Description

Technical Field

[0001] This application relates to a gas ignition device based on a two-stage booster that supports multiple batteries, belonging to the field of electronic ignition technology. Background Technology

[0002] With the rapid development and widespread application of gas appliances, the market demand for gas appliances is becoming increasingly strong. Ignition devices are one of the important components of gas appliances.

[0003] Existing ignition devices have three major drawbacks:

[0004] 1. Lithium battery dependency: The ignition circuit requires a 3.7-4.2V input, and other types of batteries besides lithium batteries are not supported.

[0005] 2. Energy conversion efficiency: The single-stage boost voltage results in a peak current of over 2A, necessitating the use of TO-252 packaged MOSFETs.

[0006] 3. Transportation restrictions: International Dangerous Goods Code (IDC) Class 9 requires lithium batteries to be transported separately from gas-fired devices.

[0007] To address the aforementioned issues, there is an urgent need for a gas ignition device that supports multiple battery types, reduces peak current, and is easy to transport. Utility Model Content

[0008] This application provides a gas ignition device based on a two-stage boost converter that supports multiple battery types, in order to solve the problems of existing products not supporting multiple battery types, having high peak current, and being inconvenient to transport.

[0009] To address the aforementioned problems, embodiments of this application provide a gas ignition device based on a two-stage boost converter that supports multiple battery types, comprising:

[0010] Power supply, supporting multiple battery types, including dry cell batteries, button batteries and lithium batteries;

[0011] A primary energy storage capacitor connected to the power supply;

[0012] A first boost circuit connected to the primary energy storage capacitor is used to boost the voltage output by the power supply to an intermediate voltage;

[0013] A secondary energy storage capacitor connected to the output terminal of the first boost circuit;

[0014] A second boost circuit connected to the secondary energy storage capacitor is used to boost the intermediate voltage to the ignition voltage.

[0015] Based on the above-mentioned gas ignition device supporting multiple batteries based on dual-stage boost, the output voltage of the power supply is optionally 1.5V.

[0016] Based on the above-mentioned gas ignition device supporting multiple batteries based on dual-stage boost, optionally, the capacitance values ​​of the primary energy storage capacitor and the secondary energy storage capacitor are greater than or equal to 470μF.

[0017] Based on the above-mentioned gas ignition device supporting multiple batteries based on dual-stage boost, optionally, the first boost circuit includes a first boost chip and an inductor, wherein the inductor is disposed between the voltage input terminal of the boost chip and the first-stage energy storage capacitor.

[0018] Based on the above-mentioned gas ignition device supporting multiple batteries based on dual-stage boost, optionally, the second boost circuit includes a second boost chip and a compact power device. The control terminal of the compact power device is connected to the power output terminal of the second boost chip, and the output terminal is connected to the secondary coil of the high-voltage transformer.

[0019] Based on the above-mentioned gas ignition device supporting multiple batteries based on dual-stage boost, optionally, the compact power device is a switching transistor with a package size of less than 3×3mm.

[0020] Based on the above-mentioned gas ignition device supporting multiple batteries based on dual-stage boost, the switching transistor may optionally be a MOSFET.

[0021] Based on the above-mentioned gas ignition device supporting multiple batteries based on dual-stage boost, optionally, the intermediate voltage is 1.5 to 5.5V, and the ignition voltage is greater than 8kV.

[0022] The technical solution provided in this application has the following beneficial effects:

[0023] 1. Through an innovative two-stage boost architecture, it can support power supply from low-voltage dry cell batteries and coin cells;

[0024] 2. By adopting a distributed energy storage strategy, namely a primary energy storage capacitor and a secondary energy storage capacitor, the peak current of the system can be reduced, thereby facilitating the reduction of the size of power devices;

[0025] 3. With a variety of different battery types, zero-charging maintenance and exemptions for dangerous goods transportation can be achieved. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0027] Figure 1This is a schematic diagram of a gas ignition device supporting multiple batteries based on a two-stage boost converter, provided as an embodiment of this application.

[0028] Figure 2 A partial circuit diagram of a gas ignition device supporting multiple batteries based on a dual-stage boost converter provided in one embodiment of this application;

[0029] Figure 3 This is another part of the circuit structure diagram of a gas ignition device supporting multiple batteries based on a two-stage boost converter, provided as an embodiment of this application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. 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. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] Some embodiments of this application provide a gas ignition device based on a two-stage boost converter that supports multiple types of batteries, see reference. Figure 1 , Figure 1 This is a schematic diagram of a gas ignition device supporting multiple batteries based on a two-stage boost converter, provided as an embodiment of this application.

[0032] like Figure 1 As shown, the gas ignition device supporting multiple batteries based on dual-stage boosting in this embodiment includes: a power supply, a primary energy storage capacitor connected to the power supply, a first boosting circuit connected to the primary energy storage capacitor, a secondary energy storage capacitor connected to the output terminal of the first boosting circuit, and a second boosting circuit connected to the secondary energy storage capacitor.

[0033] The power supply is responsible for powering the entire system and supports various battery types, including dry cell batteries, button batteries, and lithium batteries. It should be noted that existing dry cell batteries and button batteries have low output voltages; for example, dry cell batteries are typically 1.5V, which cannot meet the requirements of existing ignition devices. However, this application utilizes a specific two-stage boost circuit design to enable dry cell batteries and button batteries to also serve as the system's power supply.

[0034] The primary energy storage capacitor is directly connected to the power supply output terminal and is used for energy storage and release.

[0035] The input of the first boost circuit is connected to the first-stage energy storage capacitor, which is used to boost the voltage output by the power supply (and the first-stage energy storage capacitor) to an intermediate voltage.

[0036] The secondary energy storage capacitor is connected to the output terminal of the first boost circuit and is also used for energy storage and release.

[0037] The input terminal of the second boost circuit is connected to the secondary energy storage capacitor, which is used to boost the intermediate voltage to the ignition voltage.

[0038] In the above scheme, the essential function of the primary energy storage capacitor is as follows:

[0039] 1. Energy buffering: Batteries (especially dry cell / button batteries) have high internal resistance and cannot directly provide large currents. Therefore, by setting up a primary energy storage capacitor to quickly store electrical energy during low-voltage phases, the voltage of the battery can be prevented from dropping sharply due to instantaneous high-current discharge.

[0040] 2. Stabilize intermediate voltage: The intermediate voltage output by the first boost circuit may fluctuate due to load fluctuations, but the first-stage energy storage capacitor can maintain the stability of the intermediate voltage through charging and discharging, providing a smooth input for the second-stage boost.

[0041] 3. Improve efficiency: Staged voltage boosting can reduce the voltage drop of a single-stage boost, reducing energy loss (such as heat loss), and the primary energy storage capacitor can optimize energy transfer efficiency in this process.

[0042] The essential functions of a secondary energy storage capacitor are as follows:

[0043] 1. High-voltage pulse generation: Ignition requires a short-term high voltage (such as several kilovolts). The secondary energy storage capacitor stores high-energy charge after the second-stage voltage boost and releases it at the moment of discharge to form sufficient ignition energy.

[0044] 2. Reduced power supply design complexity: If a single-stage boost converter is used to directly boost the voltage from the power supply voltage to the ignition voltage, the circuit must withstand an extremely high boost ratio, placing stringent requirements on component voltage ratings and topology. A two-stage energy storage capacitor can alleviate this pressure through an intermediate voltage stage.

[0045] 3. Controlling the discharge timing: The capacity of the secondary energy storage capacitor and the parameters of the discharge circuit (such as through the spark plug gap) can precisely control the duration and intensity of the high-voltage pulse to ensure reliable ignition.

[0046] In summary, the primary energy storage capacitor focuses on energy accumulation and stabilization during the low-voltage phase, addressing the issue of insufficient battery output capacity. The secondary energy storage capacitor focuses on the concentrated release of energy during the high-voltage phase, achieving the instantaneous high power required for ignition. The synergistic effect of the two stages is that they form a "relay" energy transfer system, protecting the battery while efficiently generating a high-voltage pulse, adapting to various battery inputs (such as 3.7V lithium batteries or 1.5V button batteries, which can be adapted by adjusting the intermediate voltage), and also reducing the system's peak current, facilitating the reduction of power device size.

[0047] Furthermore, since a variety of different battery types can be used, when using dry cell batteries or button batteries, zero charging maintenance and exemptions from dangerous goods transportation can be achieved, avoiding the various inconveniences of using lithium batteries.

[0048] In some embodiments, the output voltage of the power supply is 1.2 to 5.5V, and the specific value in actual application is determined based on factors such as the type of battery used. For example, when using dry cell batteries, the output voltage of the power supply is 1.5V. When using button cell batteries, the output voltage can be 1.2V to 3.7V, depending on the type of button cell battery.

[0049] In some embodiments, the capacitance values ​​of the primary and secondary energy storage capacitors are greater than or equal to 470 μF. To ensure the desired effect is achieved, the capacitance values ​​of the primary and secondary energy storage capacitors cannot be too small, and generally need to be above 470 μF.

[0050] In some embodiments, the first boost circuit includes a first boost chip and an inductor, with the inductor positioned between the voltage input terminal of the boost chip and the first-stage energy storage capacitor. The first boost chip is responsible for boosting the voltage, while the inductor provides protection and filtering. The first boost chip may be an SOT23-5 packaged chip.

[0051] In some embodiments, the second boost circuit includes a second boost chip and a compact power device. The control terminal of the compact power device is connected to the power output terminal of the second boost chip, and the output terminal is connected to the secondary coil of the high-voltage transformer. The second boost chip works with the high-voltage transformer to achieve voltage boost. The second boost chip can be an SOT23-6 PWM control chip. The compact power device performs the control function. Furthermore, a power transistor replaces the TO-252 packaged MOSFET, using a compact, small-volume power transistor, thereby reducing the device size.

[0052] In some embodiments, the compact power device is a switching transistor with a package size of less than 3×3mm. A MOSFET is also optional. The power transistor replaces the TO-252 packaged MOSFET, employing a small-size power transistor.

[0053] In some embodiments, the intermediate voltage is 1.5–5.5V, which can be set according to actual needs. Additionally, the ignition voltage can be greater than 8kV to ensure effective ignition.

[0054] To make the above solution easier to understand and implement, further explanation is provided in conjunction with the accompanying drawings.

[0055] Reference Figure 2 and Figure 3 , Figure 2 This is a partial circuit diagram of a gas ignition device supporting multiple batteries based on a two-stage boost converter, provided in one embodiment of this application. Figure 3 This is another part of the circuit structure diagram of a gas ignition device supporting multiple batteries based on a two-stage boost converter, provided as an embodiment of this application. (See diagram below.) Figure 2 and Figure 3 As shown, this application provides a specific circuit structure. Its structure and function are as follows:

[0056] like Figure 2 As shown, the positive terminal of the power supply is connected to switch J1. Switch J1 is connected to capacitors C1 and C2 and electrolytic capacitor E1 as a first-stage energy storage capacitor, and then connected to inductor L1, which is connected to the fifth pin of the first boost chip U1. The second pin of U1 outputs a 5-volt voltage, which is stored in energy storage capacitors E2, C3 and C4, thus forming a first-stage boost module.

[0057] like Figure 3 As shown, the second boost chip U2 generates an oscillation signal, and pin 6 is connected to the power transistor Q1 through resistor R2. The drain of Q1 is connected to the primary coil of the high voltage transformer, forming a two-stage boost.

[0058] In addition, VD1 in this circuit is an isolation high-frequency diode to prevent backflow of power supply to the U1 chip during ignition when the battery is low, which could cause the chip to malfunction. When the U1 chip is powered on, it outputs a mixing pulse from pin 6. The high-frequency part of the signal is used to drive the high-voltage transformer for ignition. The frequency is 20kHz, and the low-frequency part adjusts the power. Pin 6 of the U1 chip is connected to the gate of Q1 through resistor R2. Q1 is a power switch transistor in an SOT-89 package, and T1 is the high-voltage transformer used for ignition. The operating current of this circuit is between 500mA and 700mA.

[0059] The model numbers and parameters of various circuit components, such as resistors, capacitors, boost converter chips, and power transistors, can be found in [reference needed]. Figure 2 and Figure 3 The annotations in the text will not be elaborated here.

[0060] The technical solution provided in this application has the following beneficial effects:

[0061] 1. Through an innovative two-stage boost architecture, it can support power supply from low-voltage dry cell batteries and coin cells;

[0062] 2. By adopting a distributed energy storage strategy, namely a primary energy storage capacitor and a secondary energy storage capacitor, the peak current of the system can be reduced, thereby facilitating the reduction of the size of power devices;

[0063] 3. With a variety of different battery types, zero-charging maintenance and exemptions for dangerous goods transportation can be achieved.

[0064] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual stage boost based gas ignition device supporting multiple batteries, characterized by, include: Power supply, supporting multiple battery types, including dry cell batteries, button batteries and lithium batteries; A primary energy storage capacitor connected to the power supply; A first boost circuit connected to the primary energy storage capacitor is used to boost the voltage output by the power supply to an intermediate voltage; A secondary energy storage capacitor connected to the output terminal of the first boost circuit; A second boost circuit connected to the secondary energy storage capacitor is used to boost the intermediate voltage to the ignition voltage.

2. The dual step-up boost based multi-battery supported gas ignition device according to claim 1, wherein, The power supply has an output voltage of 1.5V.

3. The dual step-up boost based multi-battery supported gas ignition device according to claim 1, wherein, The capacitance values ​​of the primary energy storage capacitor and the secondary energy storage capacitor are greater than or equal to 470μF.

4. The dual step-up boost based multi-battery supported gas ignition device according to claim 1, wherein The first boost circuit includes a first boost chip and an inductor, wherein the inductor is disposed between the voltage input terminal of the boost chip and the first-stage energy storage capacitor.

5. The dual step-up boost based multi-battery supported gas ignition device according to claim 1, wherein The second boost circuit includes a second boost chip and a compact power device. The control terminal of the compact power device is connected to the power output terminal of the second boost chip, and the output terminal is connected to the secondary coil of the high voltage transformer.

6. The dual step-up voltage based multi-battery supported gas ignition device according to claim 5, wherein The compact power device is a switching transistor with a package size of less than 3×3mm.

7. The dual step-up voltage based multi-battery supported gas ignition device according to claim 6, wherein The switching transistor is a MOSFET.

8. The dual step-up boost based multi-battery supported gas ignition device according to claim 1, wherein, The intermediate voltage is 1.5 to 5.5V, and the ignition voltage is greater than 8kV.

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