CN106452184B - A kind of wearable temperature difference electricity generation device for the power supply of low-power consumption human diagnosis equipment - Google Patents

Abstract

The invention discloses a wearable thermoelectric power generation device for supplying power to low-power human body diagnostic equipment, including a thermoelectric power generation module, a flexible supercapacitor, an MPPT controller, an external interface, and a wearable clothing carrier; the thermoelectric power generation module utilizes body temperature and external environment The temperature difference converts thermal energy into electrical energy; the flexible supercapacitor is used to store the generated electrical energy; the MPPT controller uses the P&O algorithm to control the stable output of the electrical energy in the flexible supercapacitor to adapt to the power consumption of external electrical appliances; the external interface is used to output electrical energy The thermoelectric power generation module is embedded in the hole reserved in the clothing carrier, the hot end of the thermoelectric power generation module contacts the human skin, the cold end of the thermoelectric power generation module contacts the external environment, and the flexible supercapacitor, MPPT controller and external interface are set on the clothing carrier In the interlayer, the invention can realize the combination of the semiconductor thermoelectric power generation module and the clothing, and generate electric energy through the difference between the body temperature of the human body and the ambient temperature of the outside world.

Description

A wearable thermoelectric power generation device for powering low-power human diagnostic equipment

technical field

The invention belongs to the technical field of thermoelectric power generation, and in particular relates to a wearable thermoelectric power generation device for powering low-power human body diagnostic equipment.

Background technique

The human body diagnostic device, which is mainly composed of low-power human body sensors, plays an important role in the fields of disease prevention and health monitoring. Currently, using traditional batteries for power supply is the mainstream choice, resulting in frequent charging and battery replacement, as well as serious environmental pollution; therefore, people continue to explore sustainable and clean energy options to replace batteries.

So far, scientists have conducted a lot of research in the field of solar and wind energy, but these energies themselves have specific external environments. Under certain conditions, it is almost impossible for the sun or wind to play a role, such as in buildings or at night. For this reason, human diagnostic equipment considered for development requires a stable power supply, and solar and wind power are not ideal options.

Thermoelectric power generation is to convert thermal energy into electrical energy by driving semiconductors in a temperature difference manner. Thermoelectric power generation is mainly the conversion between thermal energy and electrical energy. Since this process has neither chemical reaction nor physical reaction, this power generation technology will not cause environmental pollution. influences. The thermoelectric power generation component is small in size, wears little during use, and has a long service life. With the development of science and technology, people's demand for energy is getting higher and higher. The thermoelectric power generation module has the characteristics that are obviously superior to the traditional power generation technology and the environmental protection of its own power generation makes it suitable for the utilization of industrial waste heat, waste heat recovery and space diving. Show your skills in the application.

With the development of wearable devices and portable electronic devices, powered devices not only need to provide sufficient power and energy density, but also need to be flexible so that they can be combined with clothing. As a new type of high-performance electrochemical energy storage device, supercapacitors have been widely studied and applied, and bendable and foldable flexible supercapacitors are becoming a trend. Compared with traditional batteries and ordinary supercapacitors, supercapacitors are flexible, clean, and combine with clothing almost perfectly.

People who love sports often wear sports equipment during exercise, such as wrist guards, leg guards and sports tights. These sports equipment not only have good elasticity, but also can well protect the corresponding joints. Using these sports equipment as the clothing carrier of the wearable thermoelectric power generation device to design a wearable thermoelectric power generation device can not only make the hot end of the thermoelectric power generation piece close to the skin, but also maintain the aesthetics of fashionable sports equipment in appearance, which is easier Be accepted by people.

In order to overcome the disadvantages of traditional battery power supply, it is necessary to design a wearable thermoelectric power generation device to supply power for human diagnostic equipment by combining flexible supercapacitors and semiconductor thermoelectric power generation modules.

Contents of the invention

In view of this, the present invention provides a wearable thermoelectric power generation device for powering low-power human body diagnostic equipment, which can realize the combination of semiconductor thermoelectric power generation module and clothing, and generate electric energy through the difference between the body temperature of the human body and the ambient temperature of the outside world. After experiments, the device can completely replace batteries to power low-power medical sensors such as heart rate sensors.

Realize the technical scheme of the present invention as follows:

A wearable thermoelectric power generation device for powering low-power human body diagnostic equipment, including a thermoelectric power generation module, a flexible supercapacitor, a maximum power point tracking MPPT controller, an external interface and a wearable clothing carrier;

The thermoelectric power generation module converts heat energy into electrical energy by utilizing the temperature difference between human body temperature and the external environment;

Flexible supercapacitors are used to store the generated electrical energy;

The MPPT controller uses the P&O algorithm of the perturbation and observation method to control the stable output of electric energy in the flexible supercapacitor to adapt to the power consumption of external electrical appliances;

The external interface is used to output electric energy;

The thermoelectric power generation module is inlaid and fixed in the reserved hole of the clothing carrier. The hot end of the thermoelectric power generation module contacts the human skin, and the cold end of the thermoelectric power generation module contacts the external environment. The flexible supercapacitor, MPPT controller and external interface are set on the clothing carrier in the mezzanine.

Further, the wearable clothing carrier is sports equipment.

Further, the wearable thermoelectric power generation device also includes a flexible printed circuit board PCB, and the flexible PCB is used for the electrical connection between the thermoelectric power generation module and the flexible supercapacitor and between the flexible supercapacitor and the MPPT controller.

Further, the wearing clothing carrier is a wrist guard or a leg guard.

Further, the wearing clothing carrier is sports tights.

Further, the wearable thermoelectric power generation device also includes a radiator. The material of the radiator is copper-aluminum alloy. The radiator is bonded to the cold end of the thermoelectric power generation module through thermal conductive silica gel. into the reserved holes in the wrist or leggings.

Further, the thermoelectric power generation module is composed of a plurality of thermocouples connected in series, and the surroundings of the thermoelectric power generation module are sealed with plastic.

Further, a small plastic power supply box is provided in the interlayer of the wearable clothing carrier, with a built-in MPPT controller and an external interface.

Further, zippers are arranged around the thermoelectric power generation module.

Beneficial effect:

(1) Using sports equipment as the carrier of wearing clothing not only ensures the appearance but also realizes the close contact between the thermoelectric power generation module and the skin, which is easy to be accepted by more users.

(2) The use of flexible devices (flexible supercapacitors and flexible PCBs) improves the comfort of wearable energy supply devices.

(3) The present invention combines green energy and wearable equipment, which can fully guarantee the use of electric energy for low-power electrical appliances, and is a green, environmentally friendly and efficient sustainable energy source.

Description of drawings

Fig. 1 is the overall structural block diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of a single thermoelectric power generation module combined with a wristband.

Figure 3 is an external rendering of the combination of a single thermoelectric power generation module and a wristband.

Fig. 4 is a schematic diagram of the inner structure of a combination of multiple thermoelectric power generation modules and sports tights.

Fig. 5 is an external rendering of the combination of multiple thermoelectric power generation modules and sports tights.

Among them, 1-radiator, 2-thermoelectric power generation module, 3-wristband, 4-human skin, 5-wrist, 6-zipper, 7-sports tights, 8-flexible PCB, 9-flexible supercapacitor.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in Figure 1, the present invention provides a wearable thermoelectric power generation device for powering low-power human body diagnostic equipment, including a thermoelectric power generation module, a flexible supercapacitor, an MPPT controller, an external interface and a wearable clothing carrier;

The thermoelectric power generation module utilizes the temperature difference between the body temperature of the human body and the external environment to convert heat energy into electrical energy; in this embodiment, as shown in Figure 2 and Figure 3, it is a thermoelectric power generation device integrated on the wristband (3), each thermoelectric power generation module ( The cold end of 2) is bonded to the heat sink (1) through thermal silica gel, and the four outer edges of the heat sink (1) are in close contact with the wearable clothing carrier, namely the wristband (3) to achieve the fixed temperature difference power generation module (2). Function, the main material of the radiator (1) is copper-aluminum alloy, the size is 40*40*11mm, through the elasticity of the clothing, the hot end of the thermoelectric power generation module (2) is closely attached to the skin at the skin contact level, fully absorbing the heat energy of the human body. The whole device has simple structure, low cost, and is convenient for expanding production. The materials and devices used are noiseless, pollution-free and can continuously supply power.

A single thermoelectric power generation module consists of many P-type and N-type semiconductors made of bismuth antimonide to form multiple thermocouples. Since a single thermocouple can only provide a weak voltage, multiple thermocouples are connected in series to form a thermocouple array, which greatly improves supply voltage. Moreover, the surroundings of each thermoelectric power generation module are sealed with plastic to prevent water and moisture. The internal P-type and N-type semiconductors have a stable working environment and the overall service life is extended.

The flexible supercapacitor is used to store the generated electric energy; the present invention uses the flexible supercapacitor as an energy storage device, uses commercialized carbon fiber textiles (referred to as carbon cloth) as a substrate, and deposits a polyaniline film on the surface of the carbon cloth by electrochemical deposition. , combined with PVA/H2SO4 gel electrolyte to prepare a flexible all-solid-state supercapacitor. Tests have shown that connecting 3 flexible supercapacitors in series is enough to light an LED bulb. Flexible supercapacitors have the flexibility of cloth and can maintain stable performance under different bending conditions. Because the two sides of the flexible super capacitor are positive and negative respectively, the cores of the two wires are respectively pasted on both sides of the flexible super capacitor with insulating black tape. These two wires are the positive and negative leads of the flexible super capacitor. . By connecting the two positive and negative leads of the flexible supercapacitor to the positive and negative poles of the thermoelectric power generation module respectively, the electric energy of the thermoelectric power generation module is stored in the flexible supercapacitor.

The MPPT controller uses the P&O algorithm to control the stable output of electric energy in the flexible supercapacitor to adapt to the power consumption of external low-power electrical appliances;

The external interface is used to output stable electric energy;

The thermoelectric power generation module is inlaid and fixed in the reserved hole of the clothing carrier. The hot end of the thermoelectric power generation module is in contact with the human skin, and the cold end of the thermoelectric power generation module is in contact with the external environment. The flexible supercapacitor, MPPT controller and external interface are sewn on the clothing carrier in the mezzanine. There are small plastic power supply boxes in the interlayer of the clothing carrier, with a built-in MPPT controller and usb interface, which is convenient for connecting external devices. Among them, the MPPT controller is embedded with the P&O algorithm, so that the thermoelectric power generation module supplies power to the load with the maximum power.

The wearable clothing carrier is sports equipment, such as wrist guards, leg guards and sports tights, etc., wherein a single thermoelectric power generation module is combined with the wrist guards and leg guards, and multiple thermoelectric power generation modules are combined with sports tights to collect wrists, calves and abdomen respectively. of human body heat. Give full play to the elastic fabric of these sports equipment to make the thermoelectric power generation module close to the skin while maintaining comfort, and the appearance is not much different from usual. Compared with other wearable devices with abrupt appearance, the present invention is easier to be accepted by the public. Here we regard the thermoelectric power generation module and the radiator as a thermoelectric power generation unit. The specific combination of the thermoelectric power generation unit and the clothing is to attach the radiator to the clothing. The thermoelectric power generation unit is embedded in the clothing as a whole to ensure that its hot end is in contact with the human skin. Zippers (6) are arranged around the thermoelectric power generation unit, so that the thermoelectric power generation unit can be disassembled, which is convenient for washing clothes.

The wearable thermoelectric power generation device also includes a flexible PCB, which is used for the electrical connection between the thermoelectric power generation module and the flexible supercapacitor and between the flexible supercapacitor and the MPPT controller. In order to improve the comfort of the wearable thermoelectric power generation device and simplify the wiring, the flexible PCB is used as the carrier of the electrical connection of the present invention, and the positive and negative electrodes of each part of the present invention are connected to the flexible PCB. Copper foil is attached to both sides of the flexible PCB to reduce impedance. The specific connection method is to connect the positive and negative lead wires of each part through the holes on the flexible PCB, and replace the traditional wire connection by wiring on the flexible PCB. On the one hand, the modularization degree of the present invention is improved; Conducive to system maintenance. Like the flexible supercapacitor, the flexible PCB can maintain the connection of the circuit under different bending conditions, and can be easily combined with clothing.

Figure 4 is a schematic diagram of the combined internal structure of multiple thermoelectric power generation modules (2) and sports tights (7). The thermoelectric power generation modules (2) and flexible supercapacitors (9) are connected through a flexible PCB (8). At the same time, it also achieves the purpose of saving materials. Through the analysis of human body temperature, since the upper body is covered by clothes, we default that the temperature does not change much. When selecting a location, ensure that the skin temperature is as consistent as possible to reduce the impact of mismatch. We use multiple thermoelectric power generation modules as a thermoelectric power generation array. When the thermoelectric power generation array is working, each thermoelectric power generation chip in the array works in different states, resulting in the overall output power being less than the sum of the output power of a single thermoelectric power generation chip. This phenomenon is Mismatch phenomenon. The phenomenon of mismatch is inevitable. The main reasons are that the models of the thermoelectric generators are different, the production processes of different manufacturers are different, the temperature distribution of the human body surface is uneven, and the degree of combination of the thermoelectric generators and the human body is different, which leads to the difference between the hot end and the cold end. Different temperature differences can lead to mismatch phenomenon.

Fig. 5 is the actual appearance rendering of the wearable thermoelectric power generation device. Similarly, we design a detachable device composed of a zipper (6) to facilitate cleaning of clothes. It can be seen from the figure that the thermoelectric power generation module (2) is well integrated into the designed clothing.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (1)

1. a kind of wearable temperature difference electricity generation device for the power supply of low-power consumption human diagnosis equipment, which is characterized in that sent out including the temperature difference Electric module, flexible super capacitance, MPPT maximum power point tracking MPPT controller, external interface and garments worn carrier；

Temperature-difference power generation module converts heat into electric energy using the temperature difference of body temperature and external environment；The thermo-electric generation Module is made of multiple concatenated thermocouples, and plastic cement sealing is all made of around temperature-difference power generation module；The temperature-difference power generation module Slide fastener is arranged in surrounding；

Flexible super capacitance is for storing generated electric energy；

MPPT controller is steadily exported using the electric energy in perturbation observation method P＆O algorithms control flexible super capacitance, outer to adapt to The electricity consumption of boundary's electrical appliance；

External interface is for exporting electric energy；

The garments worn carrier is wrist guard, legging or movement tight；Plastics are equipped in the interlayer of the garments worn carrier Power supply capsule, built-in MPPT controller and external interface；

Temperature-difference power generation module, which is inlayed, to be fixed in the reserved hole of garments worn carrier, and the hot junction of temperature-difference power generation module contacts human body skin The cold end of skin, temperature-difference power generation module contacts external environment, and flexible super capacitance is arranged in the interlayer of garments worn carrier；

The wearable temperature difference electricity generation device further includes flexible circuit board PCB, and flexible circuit board PCB is sent out for the temperature difference The electrical connection between electrical connection and flexible super capacitance and MPPT controller between electric module and flexible super capacitance；

The wearable temperature difference electricity generation device further includes radiator, and the material of radiator is albronze, and radiator passes through heat conduction The cold end of silica gel and temperature-difference power generation module bonds, and four outers of radiator are bonded in wrist guard, legging or movement tight and reserve Hole in.