CN215498382U - Portable gas water heater - Google Patents
Portable gas water heater Download PDFInfo
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- CN215498382U CN215498382U CN202121453004.7U CN202121453004U CN215498382U CN 215498382 U CN215498382 U CN 215498382U CN 202121453004 U CN202121453004 U CN 202121453004U CN 215498382 U CN215498382 U CN 215498382U
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Abstract
The utility model provides a portable gas water heater, comprising: the device comprises a battery pack, a battery management module, a DC-DC voltage conversion module, a controller and a first load; the battery management module is provided with a power access port, a charge and discharge port and a communication port; the battery pack is connected with the power access port; the input end of the DC-DC voltage conversion module is connected with a charging and discharging port; the output end of the DC-DC voltage conversion module is connected with a power supply port of the controller; the power supply port of the first load is connected with the charge and discharge port; the communication port of the battery management module is connected with the communication port of the controller; the output voltage of the charging and discharging port in the discharging working state is larger than the output voltage of the DC-DC voltage conversion module in the working state.
Description
Technical Field
The utility model relates to the technical field of gas water heaters, in particular to a portable gas water heater.
Background
At present, most of portable gas water heaters in the prior art still need an external power supply, namely a vehicle-mounted power supply or an adapter, but still have the possibility that the requirements of all loads in the water heater on working voltage cannot be met, and a power supply is needed to be additionally configured for supplying power to high-power loads such as a water pump and the like during use. Therefore, the portable gas water heater in the traditional technology is greatly limited by the power supply power, and the internal power supply system is not perfect enough, which causes inconvenience to the user to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model provides a portable gas water heater for overcoming the defects in the prior art.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
a portable gas water heater comprising: the device comprises a battery pack, a battery management module, a DC-DC voltage conversion module, a controller and a first load; the battery management module is provided with a power access port, a charge and discharge port and a communication port;
the battery pack is connected with the power access port; the input end of the DC-DC voltage conversion module is connected with a charging and discharging port; the output end of the DC-DC voltage conversion module is connected with a power supply port of the controller; the power supply port of the first load is connected with the charge and discharge port; the communication port of the battery management module is connected with the communication port of the controller;
the output voltage of the charging and discharging port in the discharging working state is larger than the output voltage of the DC-DC voltage conversion module in the working state.
Preferably, the method further comprises the following steps: a second load and a third load; the second load includes: a direct current gas valve and a temperature controller; the third load includes: a wind pressure switch, a temperature sensor and a water flow sensor; the DC-DC voltage conversion module includes: a first DC-DC sub-module and a second DC-DC sub-module;
the input end of the first DC-DC sub-module is used as the input end of the DC-DC voltage conversion module, and the first output end of the first DC-DC sub-module is used as the output end of the DC-DC voltage conversion module and is connected with the direct-current gas valve and the temperature controller;
the input end of the second DC-DC sub-module is connected with the second output end of the first DC-DC sub-module, and the output end of the second DC-DC sub-module is used as the output end of the DC-DC voltage conversion module and is connected with the wind pressure switch, the temperature sensor, the water flow sensor and the power port of the controller.
Preferably, the method further comprises the following steps: a second load and a third load; the second load includes: a direct current gas valve and a temperature controller; the third load includes: a wind pressure switch, a temperature sensor and a water flow sensor; the DC-DC voltage conversion module includes: a first DC-DC sub-module and a second DC-DC sub-module;
the input end of the first DC-DC sub-module is used as the input end of the DC-DC voltage conversion module, and the output end of the first DC-DC sub-module is used as the output end of the DC-DC voltage conversion module and is connected with the direct-current gas valve and the temperature controller;
the input end of the second DC-DC submodule is used as the input end of the DC-DC voltage conversion module, and the output end of the second DC-DC submodule is used as the output end of the DC-DC voltage conversion module and is connected with the wind pressure switch, the temperature sensor, the water flow sensor and the power end port of the controller.
Preferably, the first load includes: a direct-current water pump and a direct-current fan.
Preferably, the battery management module includes: a main chip and a charge-discharge circuit; the charge and discharge port comprises a charge and discharge anode port and a charge and discharge cathode port; the power supply access port comprises a power supply anode input port and a power supply cathode input port;
the anode of the battery pack is connected with the anode input end of the power supply, and the cathode of the battery pack is connected with the cathode input end of the power supply;
the positive input end of the power supply is connected with a charge-discharge positive port; the input end of the negative electrode of the power supply is connected with a charge-discharge negative electrode port through a charge-discharge circuit;
the control end of the charge-discharge circuit is connected with the control end of the main chip; and the signal end of the main chip is used as a communication port of the battery management module.
Further, the battery management module further includes: a voltage reduction circuit;
the power port of the main chip is connected with the positive input port of the power supply through the voltage reduction circuit, and the grounding end of the main chip is grounded with the negative input port of the power supply.
Further, still include: and the temperature probe is used for detecting the temperature of the battery pack and is connected with the main chip.
Further, the battery management module further includes: a total current sampling circuit;
the total current sampling circuit is respectively connected with the main chip, the power supply negative electrode input port and a first charge-discharge port of the charge-discharge circuit; and a second charge and discharge port of the charge and discharge circuit is connected with a charge and discharge negative electrode port.
Still further, the charge and discharge circuit includes: the device comprises a first NMOS tube, a second NMOS tube, a third NMOS tube and a pre-charging resistor;
the grid electrode of the first NMOS tube is used as the control end of the charge-discharge circuit and is connected with the first control end of the main chip, the drain electrode of the first NMOS tube is connected with one end of the pre-charge resistor, the source electrode of the first NMOS tube is connected with the source electrode of the second NMOS tube, and the second charge-discharge port which is used as the charge-discharge circuit is connected with the charge-discharge negative electrode port;
the grid electrode of the third NMOS tube is used as the control end of the charge-discharge circuit and is connected with the third control end of the main chip, and the drain electrode of the third NMOS tube is connected with the other end of the pre-charging resistor and the drain electrode of the second NMOS tube;
the grid electrode of the second NMOS tube is used as the control end of the charge-discharge circuit and is connected with the second control end of the main chip, and the source electrode of the second NMOS tube is used as the first charge-discharge port of the charge-discharge circuit and is connected with the negative electrode input port of the power supply.
Still further, the battery management module further comprises: a reverse protection diode;
the negative electrode of the reverse protection diode is connected with the charge-discharge positive electrode port, and the positive electrode of the reverse protection diode is connected with the charge-discharge negative electrode port.
The portable gas water heater provided by the utility model at least has the following beneficial effects:
the portable gas water heater provided by the utility model can be connected with the battery pack through the battery management module, the charging and discharging port of the battery management module is connected with the DC-DC voltage conversion module, and the voltage output by the charging and discharging port during discharging is greater than the voltage output by the DC-DC voltage conversion module. Furthermore, the first load can be directly supplied with power through the charging and discharging port, and loads such as a controller of the water heater can be supplied with power through the DC-DC voltage conversion module, so that the load requirements of various different working voltages in the portable gas water heater are met. Meanwhile, the controller is connected with the communication port of the battery management module, so that charging and discharging management and protection of the battery pack are realized, power is supplied to each load in the water heater safely and stably, the power supply requirement of each load is met, and the use limitation of the portable gas water heater is reduced.
Drawings
FIG. 1 is a schematic diagram of a portable gas water heater according to an embodiment of the present invention;
FIG. 2 is another schematic diagram of the portable gas water heater according to one embodiment of the present invention;
FIG. 3 is another schematic diagram of the portable gas water heater according to one embodiment of the present invention;
FIG. 4 is another schematic diagram of the portable gas water heater according to one embodiment of the present invention; .
FIG. 5 is a circuit diagram illustrating an exemplary step-down circuit in a battery management module according to the present invention;
FIG. 6 is a circuit diagram of an embodiment of the total current sampling circuit of the present invention;
fig. 7 is a circuit diagram of a charge/discharge circuit according to an embodiment of the present invention.
In the figure, 110-battery management module, 110 a-main chip, 110 b-charging and discharging circuit, 110 c-total current sampling circuit, 110 d-voltage reduction circuit, 120-battery pack, 130-controller, 140-DC-DC voltage conversion module, 150-first load, 140 a-first DC-DC submodule, 140 b-second DC-DC submodule, 160-second load, 160 a-DC gas valve, 160 b-temperature controller, 170-third load, 170 a-wind pressure switch, 170 b-temperature sensor and 170 c-water flow sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and are used for illustration only, and should not be construed as limiting the patent. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, a portable gas water heater includes: a battery pack 120, a battery management module 110, a DC-DC voltage conversion module 140, a controller 130, and a first load 150; the battery management module 110 is provided with a power access port, a charge/discharge port, and a communication port.
The output voltage of the charge and discharge port in the discharge operating state is greater than the output voltage of the DC-DC voltage conversion module 140 in operation.
The battery pack 120 of this embodiment directly supplies power to the first load 150 through the battery management module 110, and simultaneously supplies power to the loads such as the controller 130 of the water heater through the DC-DC voltage conversion module 140 by converting the voltage into different working voltages, so that the circuit structure is simple and easy to implement, and the voltage directly output by the battery management module 110 is reasonably utilized to meet the power supply requirements of the loads with larger working voltages and other loads in the portable gas water heater. Meanwhile, the battery management module 110 is used for realizing charging and discharging management and protection of the battery pack 120, ensuring safe charging and discharging of the battery pack 120, improving safety and stability, and being beneficial to providing a good power supply environment for each load in the water heater. Further, the communication port of the battery management module 110 is connected to the communication port of the controller 130 of the water heater, and both can implement data transmission, so that the controller 130 can adjust the operation state of the load such as the fan and the proportional valve in real time according to the monitoring data of the battery management module 110 on the battery pack 120, and if there is data abnormality, a reasonable air-fuel ratio is ensured as much as possible or safety protection is performed. The portable gas water heater of the embodiment provides a stable power supply system for the load in the water heater through the mutual cooperation of the controller 130, the battery management module 110, the battery pack 120 and the DC-DC voltage conversion module 140, and improves the intelligent degree of power supply and the convenience of use.
The portable gas water heater of the embodiment can be connected to the battery pack 120 through the battery management module 110, the charging/discharging port of the battery management module 110 is connected to the DC-DC voltage conversion module 140, and the voltage output by the charging/discharging port during discharging is greater than the voltage output by the DC-DC voltage conversion module 140. Furthermore, the first load 150 can be directly supplied with power through the charging and discharging port, and loads such as the controller 130 of the water heater can be supplied with power through the DC-DC voltage conversion module 140, so that the load requirements of various different working voltages in the portable gas water heater are met. Meanwhile, the controller 130 is connected to the communication port of the battery management module 110 to implement charging and discharging management and protection of the battery pack 120, so as to safely and stably supply power to each load in the water heater, meet the power supply requirement of each load, and reduce the limitation of the portable gas water heater in use.
The DC-DC voltage conversion module 140 may be an independent module to supply power to the controller 130, or may be an integrated module of multiple sub-voltage conversion modules, and may be capable of correspondingly converting and outputting different voltages to corresponding loads, where the multiple sub-voltage conversion modules may be connected in series to the charge/discharge port of the battery management module 110 step by step according to the magnitude of the converted voltage, or may be connected to the charge/discharge port of the battery management module 110 respectively.
The battery pack 120 is formed by connecting 8 lithium battery cells in series, and the voltage platform after the series connection is 24-33V. The lithium battery monomer comprises a lithium iron phosphate battery, a ternary lithium battery, a lithium titanate battery, a lead-acid lithium battery and the like.
In a specific embodiment, as shown in fig. 2, the method further includes: a second load 160 and a third load 170; the second load 160 includes: a direct current gas valve 160a and a temperature controller 160 b; the third load 170 includes: a wind pressure switch 170a, a temperature sensor 170b, and a water flow sensor 170 c; the DC-DC voltage conversion module 140 includes: a first DC-DC submodule 140a and a second DC-DC submodule 140 b.
The input end of the first DC-DC sub-module 140a is used as the input end of the DC-DC voltage conversion module 140, and the first output end of the first DC-DC sub-module 140a is used as the output end of the DC-DC voltage conversion module 140 and is connected to the DC gas valve 160a and the temperature controller 160 b.
The input end of the second DC-DC submodule 140b is connected to the second output end of the first DC-DC submodule 140a, and the output end of the second DC-DC submodule 140b is used as the output end of the DC-DC voltage conversion module 140 and is connected to the wind pressure switch 170a, the temperature sensor 170b, the water flow sensor 170c and the power port of the controller 130.
The first DC-DC submodule 140a and the second DC-DC submodule 140b are connected in series to the charge/discharge port of the battery management module 110 step by step according to the magnitude of the converted voltage. For example, the first DC-DC sub-module 140a converts the voltage of the battery pack 120 into 24V, and provides the required operating voltage to the DC gas valve 160a and the temperature controller 160b, respectively. The second DC-DC submodule 140b converts the 24V voltage outputted from the first DC-DC submodule 140a into a 5V voltage, and provides the required operating voltages to the wind pressure switch 170a, the temperature sensor 170b, the water flow sensor 170c and the controller 130, respectively.
In a specific embodiment, as shown in fig. 3, the method further includes: a second load 160 and a third load 170; the second load 160 includes: a direct current gas valve 160a and a temperature controller 160 b; the third load 170 includes: a wind pressure switch 170a, a temperature sensor 170b, and a water flow sensor 170 c; the DC-DC voltage conversion module 140 includes: a first DC-DC submodule 140a and a second DC-DC submodule 140 b.
The input end of the first DC-DC sub-module 140a is used as the input end of the DC-DC voltage conversion module 140, and the output end of the first DC-DC sub-module 140a is used as the output end of the DC-DC voltage conversion module 140 and is connected to the DC gas valve 160a and the temperature controller 160 b.
The input end of the second DC-DC submodule 140b is used as the input end of the DC-DC voltage conversion module 140, and the output end of the second DC-DC submodule 140b is used as the output end of the DC-DC voltage conversion module 140 and is connected to the wind pressure switch 170a, the temperature sensor 170b, the water flow sensor 170c and the power end port of the controller 130.
For example, the first DC-DC submodule 140a and the second DC-DC submodule 140b are respectively connected to the charging/discharging port of the battery management module 110 directly. The first DC-DC submodule 140a converts the voltage of the battery pack 120 into 24V, and provides the required operating voltage to the DC gas valve 160a and the temperature controller 160b, respectively. The second DC-DC sub-module 140b directly converts the voltage of the battery pack 120 into a voltage of 5V, and provides the required operating voltages to the wind pressure switch 170a, the temperature sensor 170b, the water flow sensor 170c, and the controller 130, respectively.
According to actual requirements, for example, a third DC-DC submodule for converting a 24V voltage into a 12V voltage is connected to an output terminal of the second DC-DC submodule 140b, and the third DC-DC submodule may also be directly connected to the charge/discharge port of the battery management module 110. The embodiment meets various requirements of the portable gas water heater for power supply by arranging different DC-DC sub-modules.
But preferably, the advantages of serially connecting the DC-DC submodules in sequence from large to small according to the magnitude of the converted voltage are adopted: the voltage output by the battery management module 110 is the total voltage of the battery pack 120, and is converted into a power supply close to the total voltage first, and then converted downwards step by step, so that the conversion efficiency can be improved compared with a mode that each DC module is directly connected with the battery management module 110.
In a specific embodiment, the first load 150 includes a dc water pump, a dc fan; because the working voltages of the dc water pump and the dc fan are relatively large, the battery pack 120 directly supplies power to the dc water pump and the dc fan through the battery management module 110 without reducing the voltage of the battery pack 120 and supplying power to the dc water pump and the dc fan.
In one specific embodiment, as shown in fig. 1 and 4, the battery management module 110 includes: a main chip 110a and a charge-discharge circuit 110 b; the charge and discharge port comprises a charge and discharge anode port P + and a charge and discharge cathode port P-; the power supply access port comprises a power supply anode input port B + and a power supply cathode input port B-.
The positive pole of the battery pack 120 is connected to the positive input terminal B + of the power supply, and the negative pole of the battery pack 120 is connected to the negative input terminal B-.
The positive input end B + of the power supply is connected with a charge-discharge positive port P +; the negative input end B-of the power supply is connected with a negative port P-of the charge and discharge through a charge and discharge circuit 110B.
The control end of the charge-discharge circuit 110b is connected with the control end of the main chip 110 a; the signal terminal of the main chip 110a serves as a communication port of the battery management module 110.
The charge/discharge circuit 110b of the present embodiment is disposed on the negative electrode line of the battery pack 120, and the main chip 110a controls the on/off of the charge/discharge circuit to control the charging and discharging of the battery pack 120. The charging and discharging of the battery pack 120 may be controlled by controlling the on/off state of the charging and discharging circuit 110b on the positive line of the battery pack 120. However, the charge/discharge circuit 110b is provided on the negative electrode line of the battery pack 120, and is more safe.
In a specific embodiment, as shown in fig. 4, the operating voltage of the main chip 110a is provided by the battery pack 120, so the battery management module 110 further includes: and a voltage step-down circuit 110 d.
The power port of the main chip 110a is connected to the positive input port B + of the power source through the voltage-dropping circuit 110d, and the ground terminal of the main chip 110a is grounded to the negative input port B-of the power source.
The voltage-reducing circuit 110d is a specific circuit, as shown in fig. 5, and includes the following steps: the circuit comprises a resistor R1, a resistor R9, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1 and a Schottky diode D2.
One end of the resistor R1 is electrically connected to the positive electrode of the battery pack 120; the other end of the resistor R1 is electrically connected to the capacitor C1 and the cathode of the diode D1, respectively.
The anode of the diode D1 is electrically connected to the anode of the schottky diode D2 and one end of the resistor R9, respectively.
The other end of the resistor R9 is electrically connected to one end of the capacitor C3 and the power supply port VBAT of the main chip 110a, respectively.
The other terminal of the capacitor C3 is connected to ground.
The cathode of the schottky diode D2 and the other end of the capacitor C1 are connected to each other and grounded.
In a specific embodiment, in order to prevent the battery pack 120 from overheating during charging and discharging, which may cause a safety hazard, the battery management module 110 further includes: a temperature probe for detecting the temperature of the battery pack 120 and connected to the main chip 110 a.
When the temperature of the battery pack 120 is too high, the main chip 110a controls the charging circuit to be disconnected, and stops charging or discharging to protect the battery pack 120, thereby effectively improving the safety. The implementation is provided with 3 paths of temperature sampling circuits in total and is used for acquiring the temperature of the surface of the battery in the charging and discharging process of the battery pack.
In a specific embodiment, as shown in fig. 4, in order to prevent the battery pack 120 from being damaged by excessive current during the charging and discharging process of the battery pack 120, the battery management module 110 further includes: the total current sampling circuit 110c monitors the magnitude of the charge and discharge current through the total current sampling circuit 110 c.
The total current sampling circuit 110C is connected to the main chip 110a, the power supply negative input port B-and the first charge/discharge port C1 of the charge/discharge circuit 110B, respectively.
The total current sampling circuit 110c, taking a specific circuit as an example, as shown in fig. 6, is as follows: the circuit comprises a resistor R34, a capacitor C26, a capacitor C28, a capacitor C29, a resistor R35, a resistor R35, a shunt resistor R39, a shunt resistor R41, a shunt resistor R44 and a shunt resistor R47.
The shunt resistor R39, the shunt resistor R41, the shunt resistor R44 and the shunt resistor R47 are connected in parallel, and the whole of the parallel connection is connected in series between the power source negative input port B and the first charge/discharge port C1 of the charge/discharge circuit 110B.
The other end of the resistor R34 is electrically connected to the RS1 pin of the main chip 110a, and the other end of the resistor R35 is electrically connected to the RS2 pin of the main chip 110 a.
RS1 and RS2 serve as current detection terminals of the main chip 110a, and RS1 and RS2 are respectively used for detecting voltage values at two ends of the shunt resistor, and respectively calculate a current value of each shunt resistor according to ohm's law by using a known resistance value of the shunt resistor, so as to obtain a total current value, that is, a total current during charging or a total current during discharging. Further, in order to avoid the mutual influence of the two ends of the shunt resistor, in this embodiment, one end of the capacitor C26 is electrically connected to the other end of the resistor R34 and the RS1 pin of the main chip 110a, and the other end of the capacitor C26 is electrically connected to the other end of the resistor R35 and the RS2 pin of the main chip 110 a.
One end of the capacitor C28 is electrically connected to the other end of the resistor R34, the RS1 pin of the main chip 110a, and one end of the capacitor C26, respectively.
One end of the capacitor C29 is electrically connected to the other end of the resistor R35, the RS2 pin of the main chip 110a, and one end of the capacitor C29, respectively.
The other end of the capacitor C28 and the other end of the capacitor C29 are connected to each other and to ground.
In a specific embodiment, as shown in fig. 7, the charge and discharge circuit 110b includes a first NMOS transistor Q1, a second NMOS transistor Q2, a third NMOS transistor Q3, and a precharge resistor R45.
The gate of the first NMOS transistor Q1 is used as the control terminal of the charge and discharge circuit 110b and is connected to the first control terminal of the main chip 110a, the drain of the first NMOS transistor Q1 is connected to one end of the pre-charge resistor R45, the source of the first NMOS transistor Q1 is connected to the source of the second NMOS transistor Q2, and the second charge and discharge port C2 used as the charge and discharge circuit 110b is connected to the charge and discharge negative port P-.
The gate of the third NMOS transistor Q3 is connected to the third control terminal of the main chip 110a as the control terminal of the charge/discharge circuit 110b, and the drain of the third NMOS transistor Q3 is connected to the other end of the precharge resistor R45 and the drain of the second NMOS transistor Q2.
The gate of the second NMOS transistor Q2 is used as the control terminal of the charge/discharge circuit 110B and is connected to the second control terminal of the main chip 110a, and the source of the second NMOS transistor Q2 is used as the first charge/discharge port C1 of the charge/discharge circuit 110B and is connected to the negative power input port B-.
When the air temperature is low or the voltage difference of the single batteries is too large, pre-charging is firstly carried out, and the pre-charging process is as follows: the main chip 110a controls the first NMOS transistor Q1 and the second NMOS transistor Q2 to be turned on, the third NMOS transistor Q3 is turned off, the current first passes through the pre-charge resistor R45 to generate a small charging current, so as to protect the battery pack 120, and when the temperature of a single battery rises to a certain degree or the voltage of the single battery is relatively close, the main chip 110a controls the third NMOS transistor Q3 to be turned on, so that the large-current charging of the battery pack 120 is realized.
The charge and discharge circuit 110b further includes a schottky diode D11, a resistor R42, a schottky diode D10, a resistor R43, a capacitor C32, a capacitor C33, a schottky diode D7, and a resistor R38.
The anode of the schottky diode D11 is electrically connected to the gate of the third NMOS transistor Q3.
The cathode of the schottky diode D11 is electrically connected to the source of the third NMOS transistor Q3.
One end of the resistor R42 is electrically connected to the gate of the third NMOS transistor Q3 and the positive electrode of the schottky diode D11, respectively.
The other end of the resistor R42 is electrically connected to the source of the third NMOS transistor Q3 and the cathode of the schottky diode D11, respectively.
The anode of the schottky diode D10 is electrically connected to the gate of the second NMOS transistor Q2.
The cathode of the schottky diode D10 is electrically connected to the source of the second NMOS transistor Q2.
One end of the resistor R43 is electrically connected to the anode of the schottky diode D10 and the gate of the second nmos transistor Q2, respectively.
The other end of the resistor R43 is electrically connected to the cathode of the schottky diode D10 and the source of the second nmos transistor Q2, respectively.
One end of the capacitor C32 is electrically connected to the source of the second NMOS transistor Q2, and the other end of the capacitor C32 is electrically connected to the source of the first NMOS transistor Q1 via the capacitor C33.
The anode of the schottky diode D7 is electrically connected to the gate of the first NMOS transistor Q1.
The cathode of the schottky diode D7 is electrically connected to the source of the first NMOS transistor Q1.
One end of the resistor R38 is electrically connected to the gate of the first NMOS transistor Q1 and the positive electrode of the schottky diode D7, respectively.
The other end of the resistor R38 is electrically connected to the source of the first NMOS transistor Q1 and the cathode of the schottky diode D7, respectively.
Further, in the present embodiment, the third control terminal CHG, the second control terminal DSG, and the first control terminal PCHG of the main chip 110a respectively control the channels of the third NMOS transistor Q3, the second NMOS transistor Q2, and the first NMOS transistor Q1, so as to control the discharging and charging of the battery pack 120; when the voltage of any single battery of the battery pack 120 is lower than 3V, for example, the second NMOS transistor Q2 is turned off to stop the discharge of the battery pack 120, so as to protect the battery pack 120; when any single battery voltage is greater than 4.19V, for example, indicating that the charging is full, the main chip 110a controls to disconnect the first NMOS transistor Q1 and the third NMOS transistor Q3, and stops charging the battery pack 120. Further, the drain of the second NMOS transistor Q2 is also connected to the DSGD terminal of the main chip 110a, so that whether the second NMOS transistor Q2 is closed or broken can be detected by the main chip 110 a.
In a specific embodiment, as shown in fig. 4, the battery management module 110 further includes a reverse protection diode D3; the anode of the reverse protection diode D3 is electrically connected to the charge/discharge anode port P +.
The cathode of the reverse protection diode D3 is electrically connected to the drain of the first NMOS transistor Q1. And a reverse protection diode D3 for preventing the reverse connection of peripheral circuits and providing safety.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (10)
1. A portable gas water heater is characterized in that: the method comprises the following steps: a battery pack (120), a battery management module (110), a DC-DC voltage conversion module (140), a controller (130), and a first load (150); the battery management module (110) is provided with a power access port, a charge and discharge port and a communication port;
the battery pack (120) is connected with the power access port; the input end of the DC-DC voltage conversion module (140) is connected with the charge and discharge port; the output end of the DC-DC voltage conversion module (140) is connected with a power supply port of the controller (130); the power supply port of the first load (150) is connected with the charge and discharge port; the communication port of the battery management module (110) is connected with the communication port of the controller (130);
the output voltage of the charging and discharging port in the discharging working state is larger than the output voltage of the DC-DC voltage conversion module (140) in the working state.
2. The portable gas water heater of claim 1, further comprising: a second load (160) and a third load (170); the second load (160) includes: a direct current gas valve (160a) and a temperature controller (160 b); the third load (170) includes: a wind pressure switch (170a), a temperature sensor (170b) and a water flow sensor (170 c); the DC-DC voltage conversion module (140) comprises: a first DC-DC submodule (140a) and a second DC-DC submodule (140 b);
the input end of the first DC-DC sub-module (140a) is used as the input end of the DC-DC voltage conversion module (140), the first output end of the first DC-DC sub-module (140a) is used as the output end of the DC-DC voltage conversion module (140) and is connected with the direct-current gas valve (160a) and the temperature controller (160 b);
the input end of the second DC-DC submodule (140b) is connected with the second output end of the first DC-DC submodule (140a), and the output end of the second DC-DC submodule (140b) is used as the output end of the DC-DC voltage conversion module (140) and is connected with the wind pressure switch (170a), the temperature sensor (170b), the water flow sensor (170c) and the power supply port of the controller (130).
3. The portable gas water heater of claim 1, wherein: further comprising: a second load (160) and a third load (170); the second load (160) includes: a direct current gas valve (160a) and a temperature controller (160 b); the third load (170) includes: a wind pressure switch (170a), a temperature sensor (170b) and a water flow sensor (170 c); the DC-DC voltage conversion module (140) comprises: a first DC-DC submodule (140a) and a second DC-DC submodule (140 b);
the input end of the first DC-DC sub-module (140a) is used as the input end of the DC-DC voltage conversion module (140), and the output end of the first DC-DC sub-module (140a) is used as the output end of the DC-DC voltage conversion module (140) and is connected with the direct-current gas valve (160a) and the temperature controller (160 b);
the input end of the second DC-DC sub-module (140b) is used as the input end of the DC-DC voltage conversion module (140), and the output end of the second DC-DC sub-module (140b) is used as the output end of the DC-DC voltage conversion module (140) and is connected with the wind pressure switch (170a), the temperature sensor (170b), the water flow sensor (170c) and the power end port of the controller (130).
4. The portable gas water heater of claim 1, wherein: the first load (150) comprises: a direct-current water pump and a direct-current fan.
5. The portable gas water heater of claim 1, wherein: the battery management module (110) comprises: a main chip (110a) and a charge/discharge circuit (110 b); the charge and discharge ports comprise a charge and discharge positive electrode port (P +) and a charge and discharge negative electrode port (P-); the power supply access port comprises a power supply anode input port (B +) and a power supply cathode input port (B-);
the positive pole of the battery pack (120) is connected with the positive power supply input end (B +), and the negative pole of the battery pack (120) is connected with the negative power supply input end (B-);
the positive input end (B +) of the power supply is connected with the charge-discharge positive port (P +); the power supply negative electrode input end (B-) is connected with the charge-discharge negative electrode port (P-) through the charge-discharge circuit (110B);
the control end of the charge-discharge circuit (110b) is connected with the control end of the main chip (110 a); and the signal end of the main chip (110a) is used as a communication port of the battery management module (110).
6. The portable gas water heater of claim 5, wherein the battery management module (110) further comprises: a voltage-reducing circuit (110 d);
the power supply port of the main chip (110a) is connected with the positive input port (B +) of the power supply through the voltage reduction circuit (110d), and the grounding end of the main chip (110a) is grounded with the negative input port (B-) of the power supply.
7. The portable gas water heater of claim 5, wherein: further comprising: the temperature probe is used for detecting the temperature of the battery pack (120) and is connected with the main chip (110 a).
8. The portable gas water heater of claim 5, wherein the battery management module (110) further comprises: a total current sampling circuit (110 c);
the total current sampling circuit (110C) is respectively connected with the main chip (110a), the power supply negative electrode input port (B-) and a first charge-discharge port (C1) of the charge-discharge circuit (110B); the second charge and discharge port (C2) of the charge and discharge circuit (110b) is connected with the charge and discharge negative electrode port (P-).
9. The portable gas water heater of claim 8, wherein: the charge/discharge circuit (110b) includes: the transistor comprises a first NMOS transistor (Q1), a second NMOS transistor (Q2), a third NMOS transistor (Q3) and a pre-charging resistor (R45);
the grid electrode of the first NMOS tube (Q1) is used as the control end of the charge-discharge circuit (110b) and is connected with the first control end of the main chip (110a), the drain electrode of the first NMOS tube (Q1) is connected with one end of the pre-charge resistor (R45), the source electrode of the first NMOS tube (Q1) is connected with the source electrode of the second NMOS tube (Q2), and a second charge-discharge port (C2) which is used as the charge-discharge circuit (110b) is connected with the charge-discharge negative electrode port (P-);
the grid electrode of the third NMOS tube (Q3) is used as the control end of the charge-discharge circuit (110b) and is connected with the third control end of the main chip (110a), and the drain electrode of the third NMOS tube (Q3) is connected with the other end of the pre-charging resistor (R45) and the drain electrode of the second NMOS tube (Q2);
the gate of the second NMOS transistor (Q2) is used as the control terminal of the charge-discharge circuit (110B) and is connected to the second control terminal of the main chip (110a), and the source of the second NMOS transistor (Q2) is used as the first charge-discharge port (C1) of the charge-discharge circuit (110B) and is connected to the negative power input port (B-).
10. The portable gas water heater of any one of claims 5 to 9, wherein the battery management module (110) further comprises: a reverse protection diode (D3);
the negative electrode of the reverse protection diode (D3) is connected with the charging and discharging positive electrode port (P +), and the positive electrode of the reverse protection diode (D3) is connected with the charging and discharging negative electrode port (P-).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121453004.7U CN215498382U (en) | 2021-06-28 | 2021-06-28 | Portable gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121453004.7U CN215498382U (en) | 2021-06-28 | 2021-06-28 | Portable gas water heater |
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| Publication Number | Publication Date |
|---|---|
| CN215498382U true CN215498382U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121453004.7U Active CN215498382U (en) | 2021-06-28 | 2021-06-28 | Portable gas water heater |
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| Country | Link |
|---|---|
| CN (1) | CN215498382U (en) |
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