A novel battery power management device

Abstract

The utility model provides a novel battery power management device relates to the technical field of battery power management. Relate to a kind of novel battery power management device, comprising: pressure sensing module: connecting liquid level pressure sensor, for real-time acquisition and processing the liquid pressure signal of the depth where solenoid valve is located;Microprocessor: receive the analog signal of pressure sensing module, after ADC conversion, the maximum drive current required by solenoid valve is calculated;Adjustable external resistance: controlled by microprocessor, receive the control signal of microprocessor to adjust resistance value;Solenoid valve driver: connecting adjustable external resistance output end, by changing the ground resistance value dynamic adjustment output current upper limit. The utility model solves the technical problem of how to save the energy consumption of solenoid valve, prolong the service life of power supply battery.

Description

Technical Field

[0001] This utility model relates to the technical field of battery power management, and in particular to a novel battery power management device. Background Technology

[0002] In fields such as oil drilling, downhole measurement-while-drilling (MWD) instruments can be categorized into wired and wireless MWD instruments based on their signal transmission methods. Wired MWD instruments connect surface monitoring instruments and downhole measurement instruments via cables. The surface monitoring instruments can power the downhole measurement instruments and receive their transmitted electrical signals via the cable. Wireless MWD instruments, on the other hand, are battery-powered and transmit measurement signals to the surface monitoring instruments via mud pulses or battery waves. In recent years, wireless MWD instruments have developed rapidly, with the mud pulse transmission method becoming the primary method due to its simplicity and minimal impact on drilling operations.

[0003] Mud pulse transmission mainly includes positive pulse transmission and negative pulse transmission. Taking positive pulse transmission as an example, the change in the relative position of the needle valve and the orifice causes a change in the cross-sectional area of ​​the mud flow channel, which in turn causes a change in the mud pressure inside the drill string. When the needle valve rises, the mud pressure inside the drill string increases, and this pressure wave is transmitted to the surface monitoring instrument through the mud. The movement of the needle valve is driven by the opening or closing of the solenoid valve controlled by the downhole measuring instrument, and this action consumes a lot of battery power. Negative pulse transmission uses a similar principle. In summary, regardless of whether it is positive or negative pulse transmission, the solenoid valve, the actuator of the mud pulse generator of the downhole measuring instrument, is the most energy-consuming component.

[0004] Meanwhile, as mentioned above, wireless measurement-while-drilling (MWD) instruments are battery-powered, making battery life crucial. If the MWD measurement work is not completed before the battery is depleted, the MWD instrument must be removed and the battery replaced, resulting in significant waste. Therefore, how to conserve solenoid valve energy and extend battery life is a critical issue that urgently needs to be addressed in this field. Utility Model Content

[0005] The purpose of this invention is to provide a novel battery power management device that solves the technical problem of how to save energy consumption of solenoid valves and extend the life of power supply batteries.

[0006] Utility model solution:

[0007] This utility model provides a novel battery power management device, comprising: a pressure sensing module connected to a liquid level pressure sensor for real-time acquisition and processing of liquid pressure signals at the depth of the solenoid valve; a microprocessor receiving analog signals from the pressure sensing module, converting them via an ADC, and calculating the maximum drive current required by the solenoid valve; an adjustable external resistor controlled by the microprocessor, receiving control signals from the microprocessor to adjust its resistance value; and a solenoid valve driver connected to the output terminal of the adjustable external resistor, dynamically adjusting the upper limit of the output current by changing the resistance value to ground.

[0008] Furthermore, the adjustable external resistor is a digital potentiometer, or a digital potentiometer connected in series with a fixed resistor.

[0009] Furthermore, the microprocessor is configured with multiple ADC channels to perform mean filtering on the pressure signal to eliminate interference.

[0010] Furthermore, the solenoid valve driver chip includes an ISET pin and an OUT pin. The ISET pin is connected to the adjustable external resistor and is used to adjust the maximum output current of the OUT pin.

[0011] Furthermore, the solenoid valve driver chip includes an EN pin and an IN pin, which serve as logic control pins to control the current output state of the OUT pin.

[0012] Furthermore, the IN pin is connected to the power supply VCC via a pull-up resistor to maintain a high level.

[0013] Furthermore, the microprocessor uses the MSP430F147 chip.

[0014] Furthermore, the solenoid valve driver uses an MPQ6610 or MPS6610 chip.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] This device automatically adjusts the maximum current required to open or close the solenoid valve based on its depth in the liquid, i.e., the external liquid pressure. This avoids unnecessary energy consumption, significantly improving the overall power-saving capability of the equipment and effectively increasing battery life. Experiments have shown that adopting this technology significantly extends battery life, providing a strong guarantee for the long-term stable operation of wireless drilling measurement instruments. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a structural principle block diagram of the novel battery power management device;

[0019] Figure 2 This is a partial circuit diagram of the battery power management device of this novel invention.

[0020] Figure 3 This is another part of the circuit schematic of the battery power management device of this novel invention;

[0021] Figure 4 This is a schematic diagram of the working process (current output) of the new chip MPQ6610. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] This embodiment provides a novel battery power management device. Please refer to... Figure 1 As shown, it includes:

[0025] Pressure sensing module: Connects to a liquid level and pressure sensor to acquire and process liquid pressure signals at the depth of the solenoid valve in real time; Microprocessor: Receives the analog signal from the pressure sensing module, converts it via an ADC, and calculates the maximum drive current required by the solenoid valve; Adjustable external resistor: Controlled by the microprocessor, it receives control signals from the microprocessor to adjust the resistance value; Solenoid valve driver: Connects to the output terminal of the adjustable external resistor, dynamically adjusting the upper limit of the output current by changing the resistance value to ground.

[0026] The adjustable external resistor is a digital potentiometer, or a combination of a digital potentiometer and a fixed resistor connected in series. The microprocessor is configured with multiple ADC channels to perform mean filtering on the pressure signal to eliminate interference.

[0027] The solenoid valve driver chip includes an ISET pin and an OUT pin. The ISET pin is connected to the adjustable external resistor and is used to adjust the maximum output current of the OUT pin.

[0028] The solenoid valve driver chip includes EN and IN pins, which serve as logic control pins to control the current output state of the OUT pin.

[0029] The IN pin is connected to the power supply VCC via a pull-up resistor to maintain a high level.

[0030] The microprocessor uses an MSP430F147 chip. The solenoid valve driver uses an MPQ6610 or MPS6610 chip.

[0031] Example 1:

[0032] The control principle is explained using the MPQ6610 chip as an example.

[0033] A solenoid valve contains an electromagnetic coil. When the solenoid valve is activated, voltage is applied to the electromagnetic coil to generate a magnetic field. Since the coil winding has a large inductance, a large current is required in the coil and must be maintained for a period of time to generate electromagnetic force to move the magnetic core in the solenoid valve. Once the movement is complete, a smaller current is usually used to fix the magnetic core in place. The above process can be designed and completed using the MPQ6610 chip.

[0034] 1. Working principle of the MPQ6610 chip

[0035] The OUT pin is the current output pin. When the output current of the OUT pin is 1A, the ISET pin outputs 100uA. When the output current of the OUT pin is 1.5A, the ISET pin outputs 150uA. That is, the output current of the ISET pin is 1 / 10000 times the output current of the OUT pin.

[0036] The output level of the ISET pin is determined by the input levels of the EN and IN pins. The EN and IN pins are the chip's logic control pins, and their logical relationship with the OUT pin is as follows;

[0037] When EN is low, OUT has no output; when EN is high, OUT has an output. If IN is low, OUT will output low (this state is not used). If IN is high, OUT will output high, and there will be current output.

[0038] The threshold voltage of the ISET pin is 1.5V. The ISET pin is connected to the input of the internal comparator of the chip. When the voltage of the ISET pin reaches 1.5V, the state of the internal comparator of the chip flips, which causes the level of the OUT pin to flip to a low level, the output current decreases, and the output current of the OUT pin begins to decrease. When the voltage of the ISET pin reaches 1.5V, the output current of the OUT pin is the maximum output current of the chip. When the output current of the OUT pin decreases to 80% of the maximum current, the output current of the OUT pin flips to positive, and the output current of the OUT pin begins to increase again. This cycle repeats continuously.

[0039] The analysis above shows that the maximum output current of the OUT pin is controlled by the ISET pin voltage, which is related to the external resistor value (the resistance between the ISET pin and ground). For example, if the resistor value is 10K, when the OUT pin output current is 1A, the ISET pin output current is 100uA, the ISET pin voltage is controlled at 1.0V, the OUT pin output level is positive, and the output current increases. Only when the OUT pin output current is 1.5A, the ISET pin output current is 150uA, the ISET pin voltage is controlled at 1.5V, the OUT pin output level flips to low, and the output current begins to decrease. Therefore, adjusting the ISET pin and the external resistor value can adjust the maximum output current of the OUT pin. The BST pin is the chip bootstrap pin and requires a capacitor to be connected to the OUT pin. VIN is the chip voltage input pin and is connected to the power supply battery. The FAULT pin is the chip status indicator pin.

[0040] 2. Working process of chip MPQ6610 (current output diagram), as follows: Figure 4 As shown

[0041] In this circuit, if the IN pin is high, the OUT pin is high; if the EN pin is low, the OUT pin is low. When the EN pin is high, the OUT pin output current begins to increase, and the ISET pin output current also begins to increase. The ISET pin voltage (i.e., the product of the ISET pin output current and the external resistor) also increases. When the ISET pin voltage is less than 1.5V, the OUT pin output current continues to increase. When the ISET pin voltage equals 1.5V (at which point the current reaches the value shown by the red line in the diagram, which is the maximum output current of the chip), the OUT pin flips to a low level, and the OUT pin output current begins to decrease automatically. When the OUT pin output current reaches 80% of the maximum output current of the chip, the OUT pin flips to a high level, and the OUT pin output current begins to increase again, and this cycle repeats continuously. The above analysis shows that when the IN pin is high, the EN pin can control the opening and closing of the solenoid valve. When the EN pin controls the opening time for a sufficiently long time, the chip can automatically adjust the output current. The maximum output current of the chip can generate electromagnetic force to move the magnetic core in the solenoid valve. Subsequently, the chip can be designed to automatically reduce the output current to ensure that the magnetic core is fixed in place.

[0042] Example 2:

[0043] The microprocessor uses the MSP430F147 chip, and the solenoid valve driver uses the MPS6610 chip.

[0044] Please see Figure 2

[0045] The microprocessor U1 (model MSP430F147) has RS232 serial ports on pins 32 and 33. It is connected to the CT3 external socket to receive data transmitted from external measuring devices and sends the data out through liquid pressure pulses by opening or closing the solenoid valve.

[0046] Pressure sensing module: CT2 is used as an external socket to connect to an external liquid level and pressure sensor to collect the pressure data of the liquid at the current depth of the device. The pressure signal is connected to pins 2, 59, 60, and 61 of U1 through pin 2 of CT2 and a low-frequency filter circuit composed of resistor R2 and capacitor C6.

[0047] Pins 2, 59, 60, and 61 of the microprocessor U1 are the ADC converters of the microprocessor U1. They collect data from channels A0, A1, A2, and A3 of the ADC converter, respectively, and then add the collected data together and divide by 4 to obtain the average value of the external liquid level data. This data processing is mainly to eliminate interference.

[0048] Pins 54, 55, 56, and 57 of the microprocessor U1 are the data download and programming ports of U1. They are connected to the external socket CT1, through which an external programmer is connected.

[0049] C4 and C5 are decoupling capacitors for the power supply of U1.

[0050] Resistor R1 and LED D1 form a flashing circuit. This circuit is controlled by pin 16 of U1. When pin 16 of U1 is low, D1 lights up; when pin 16 of U1 is high, D1 does not light up. By observing the flashing of D1, it can be determined whether the program is running normally.

[0051] C1 and C2 are the oscillation capacitors of U1, CRY is the crystal oscillator, and capacitors C1 and C2 and crystal oscillator CRY constitute the external oscillation circuit of U1. Chip U2 (model MAX809) is the reset chip of U1, which provides a low-level reset pulse to U1 when the device is powered on.

[0052] Please see Figure 3

[0053] CT4 is an external socket, through which external battery power is supplied. C8 is a filter capacitor, and D3 is a TVS converter. When the external voltage exceeds 60V, the TVS will short-circuit momentarily to protect the subsequent chips and prevent overvoltage damage.

[0054] U3 (model MCP1790-3302E) is a voltage regulator chip. Pin 1 of U3 is the power input pin, and pin 3 of U3 is the voltage regulation output pin, which outputs a constant voltage of 3.3V, which powers other chips.

[0055] U4 (model MPS6610) is a solenoid valve driver chip. Pin 2 of U4 is connected to the power supply VCC through pull-up resistor R3, that is, when the chip IN is high level, pin 1 of U4 is the control signal EN, which is controlled by pin 12 of U1. When IN is high level and EN is high level, pin 6 of U4 outputs a high level, and U4 outputs current to drive the load. When EN is low level, pin 6 of U4 outputs a low level, and U4 shuts off the load.

[0056] The external resistor R5 and the digital potentiometer RW are connected to pin 3 (pin ISET) of U4. R5 and RW are connected in series. The total resistance between pin 3 of U4 and ground is R = R5 + RW. Changing the value of resistor RW can change the total resistance between pin 3 of U4 and ground, which can change the maximum output current of chip U4.

[0057] Pin 1 (PU) of the digital potentiometer RW is connected to pin 13 of the CPU. The CPU inputs a square wave to pin 1 of the digital potentiometer RW through the PU pin. Each square wave input moves the internal switch of the digital potentiometer one position towards the VH terminal. Similarly, pin 2 (PD) of the digital potentiometer RW is connected to pin 14 of the CPU. The CPU inputs a square wave to pin 2 of the digital potentiometer RW through the PD pin. Each square wave input moves the internal switch of the digital potentiometer one position towards the VL terminal. The CPU can control the movement of the internal switch of the digital potentiometer through the PU and PD pins, thereby changing the resistance value of the center tap output relative to ground.

[0058] Pin 6 (ASE) of the digital potentiometer RW is connected to pin 15 of the CPU. It is the automatic storage enable pin of the digital potentiometer RW. When pin ASE changes from low level to high level, the position information of the on-chip switch of the digital potentiometer can be automatically stored in the on-chip E2PROM, which plays a role in information power-off protection.

[0059] Pin 4 of U4 is the chip status output pin. When the chip experiences abnormal conditions such as overvoltage or overcurrent, pin 4 of U4 outputs a low level. At this time, the LED D2 will light up, indicating that the chip U4 is in an abnormal state.

[0060] Specific examples:

[0061] The design uses a resistor R5 = 5KΩ and a digital potentiometer X9511W with a resistor RW = 10KΩ. When RW = 0KΩ, R5 + RW = 5KΩ. Only when the solenoid valve output current is 3A will the ISET pin output 300uA, and the voltage at the ISET pin will reach the threshold voltage of 1.5V, meaning the maximum output current of the solenoid valve is 3A. When RW = 10KΩ, R5 + RW = 15KΩ. When the solenoid valve output current is 1A, the ISET pin outputs 100uA, and the voltage at the ISET pin will reach the threshold voltage of 1.5V, meaning the maximum output current of the solenoid valve is 1A. Therefore, the maximum output current of this design is between 1A and 3A.

[0062] Working Principle: The pressure sensing module connects to a liquid level and pressure sensor to collect and process the external liquid pressure signal corresponding to the depth of the solenoid valve in the liquid in real time. The microprocessor receives this analog signal, converts it via an ADC, and calculates the maximum drive current required for the solenoid valve based on the characteristic that different external liquid pressures require different magnetic forces to open or close. The microprocessor controls an adjustable external resistor to change the resistance value between the ISET pin of the solenoid valve driver chip and ground, thereby adjusting the maximum output current of the chip's OUT pin. This achieves automatic adjustment of the maximum current required to open or close the solenoid valve according to the external liquid pressure, thus saving battery power.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A novel battery power management device characterized by, include: Pressure sensing module: Connects to the liquid level and pressure sensor, used to collect and process the liquid pressure signal at the depth of the solenoid valve in real time; Microprocessor: Receives analog signals from the pressure sensing module, converts them via ADC, and calculates the maximum drive current required by the solenoid valve; Adjustable external resistor: Controlled by the microprocessor, it receives control signals from the microprocessor to adjust the resistance value; Solenoid valve actuator: Connects to the output terminal of an adjustable external resistor, and dynamically adjusts the upper limit of the output current by changing the resistance value to ground.

2. The novel battery power management device according to claim 1, wherein, The adjustable external resistor is a digital potentiometer, or a digital potentiometer connected in series with a fixed resistor.

3. The novel battery power management device according to claim 1, wherein, The microprocessor is configured with multiple ADC channels to perform mean filtering on the pressure signal to eliminate interference.

4. The novel battery power management device according to claim 1, wherein, The solenoid valve driver chip includes an ISET pin and an OUT pin. The ISET pin is connected to the adjustable external resistor and is used to adjust the maximum output current of the OUT pin.

5. The novel battery power management device according to claim 4, wherein, The solenoid valve driver chip includes EN and IN pins, which serve as logic control pins to control the current output state of the OUT pin.

6. The novel battery power management device according to claim 5, wherein, The IN pin is connected to the power supply VCC via a pull-up resistor to maintain a high level.

7. The novel battery power management device according to claim 1, wherein, The microprocessor uses the MSP430F147 chip.

8. The novel battery power management device according to claim 1, characterized in that, The solenoid valve driver uses either the MPQ6610 or MPS6610 chip.

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