TWI467820B - Thermoelectric conversion charging circuit - Google Patents

Description

Thermoelectric conversion charging circuit

The invention relates to the field of energy conversion applications, and in particular to a thermoelectric conversion charging circuit.

The basic working principle of thermoelectric energy conversion of thermoelectric wafers is the thermopile phenomenon of the junction between a single set of N-type thermoelectric materials and P-type thermoelectric materials, and the hot and cold ends of the thermopile of the PN junction are generated due to uneven heating. The temperature difference causes the main conductive carrier in the thermoelectric material (P-type is a hole, N-type is an electron) to diffuse from the hot end of the high temperature to the cold end of the low temperature, and the PN junction thermopile has positive and negative at the cold end. The accumulation of charge (where a positive charge is accumulated at the cold end of the P-type and a negative charge is accumulated at the cold end of the N-type) produces a potential difference, which is a thermoelectric conversion or a thermoelectric generation phenomenon of the Seebeck effect.

The application fields of thermoelectric energy conversion of thermoelectric wafers are quite extensive, and the field of utilizing thermoelectric energy conversion of thermoelectric wafers for electric energy charging is numerous. For example, the hot end of the thermoelectric chip is mounted on a CPU, and the thermoelectric chip thermoelectrically converts the thermal energy generated by the CPU into electrical energy. As described above, the present invention proposes a novel structure for applying a thermoelectric energy conversion of a thermoelectric chip to a charging circuit.

The present invention provides a novel structure of a thermoelectric conversion charging circuit that utilizes thermoelectric energy conversion of a thermoelectric chip to convert the converted electrical energy to the battery. Charge or power the load.

A first aspect of the present invention provides a thermoelectric conversion charging circuit comprising: a thermoelectric wafer for converting thermal energy into electrical energy; and an energy storage component electrically connected to the thermoelectric wafer for storing the converted thermoelectric wafer a switch, one end of which is electrically connected to the thermoelectric chip and the energy storage component; and a switching control circuit, wherein the detecting end is electrically connected to the thermoelectric chip, the energy storage component and the end of the switch, and The control terminal controls the opening or closing of the switch, wherein when the switching control circuit detects that the voltage level of the energy storage component is greater than or equal to a predetermined voltage value, the switching control circuit controls the switch to be in an open state from an open state.

A second aspect of the present invention provides a thermoelectric conversion charging circuit comprising: a thermoelectric wafer for converting thermal energy into electrical energy; and a booster having an input end electrically connected to the thermoelectric wafer for lifting the thermoelectric wafer a voltage level; an energy storage component electrically connected to the output end of the booster for storing the electrical energy output by the booster; and a switch electrically connected to one end of the booster And the energy storage component; and a switching control circuit, wherein the detecting end is electrically connected to the output of the booster The end, the energy storage element and the end of the switch, and the control end controls the opening or closing of the switch, Wherein, when the switching control circuit detects that the voltage level of the energy storage component is greater than or equal to a predetermined voltage value, the switching control circuit controls the switch to be in an open state from an open state.

A third aspect of the present invention provides a thermoelectric conversion charging circuit comprising: a thermoelectric wafer for converting thermal energy into electrical energy; and an energy storage component electrically connected to the thermoelectric wafer for storing the converted thermoelectric wafer Electrical energy; a booster having an input electrically connected to the thermoelectric chip and the energy storage component for boosting a voltage level of the energy storage component; and a switch having one end electrically connected to the output of the booster And a switching control circuit, the detecting end is electrically connected to the output end of the booster and the end of the switch, and the control end controls opening or closing of the switch, wherein when the switching control circuit detects When the voltage level at the output of the booster is greater than or equal to a predetermined voltage value, the switching control circuit controls the switch to be in an open state from an open state.

The present invention will be further understood by those skilled in the art to which the present invention pertains, and the embodiments of the present invention are described in detail below. .

1 is a circuit diagram of a thermoelectric conversion charging circuit according to a first embodiment of the present invention; Figure. In FIG. 1, the thermoelectric conversion charging circuit 10 includes a thermoelectric chip 12, an energy storage element 14, a switch 16, and a switching control circuit 18. The energy storage component 14 is an ultracapacitor or a capacitor. The supercapacitor is a cermet yttrium oxide supercapacitor, an activated carbon supercapacitor, a platinum-based supercapacitor or a gold-based supercapacitor.

The thermoelectric wafer 12 is electrically connected to one end of the energy storage element 14 and the switch 16, and the other end of the switch 16 is electrically connected to a battery or load 22 outside the thermoelectric conversion charging circuit 10. The switching control circuit 18 has a detecting end and a control end. The detecting end of the switching control circuit 18 is electrically connected to the end of the thermoelectric chip 12, the energy storage element 14 and the switch 16, and the control end of the switching control circuit 18 is controlled. The switch 16 is opened or closed.

As described in the prior art, a thermoelectric wafer 12 mounted on a device capable of generating heat (e.g., a CPU, a light emitting diode, or a heater, etc.) converts the thermal energy of the device into electrical energy. The energy storage component 14 is used to store the electrical energy converted by the thermoelectric wafer 12. As the electrical energy stored by the energy storage component 14 increases, the voltage level of the energy storage component 14 also increases.

The detecting end of the switching control circuit 18 detects the voltage level of the energy storage component 14. When the switching control circuit 18 detects that the voltage level of the energy storage component 14 is greater than or equal to a predetermined voltage value, the control terminal of the switching control circuit 18 The control switch 16 is turned from the open state to the closed state; when the switch control circuit 18 detects that the voltage level of the energy storage component 14 is less than the preset voltage value, the control terminal of the switch control circuit 18 controls the switch 16 to be in an open state. When the switch 16 is in the closed state, the electrical energy output by the energy storage element 14 charges or provides power to the battery or load 22.

2 is a circuit diagram of a thermoelectric conversion charging circuit of a second embodiment of the present invention. In FIG. 2, the thermoelectric conversion charging circuit 30 includes a thermoelectric chip 32, an energy storage element 34, a switch 36, a switching control circuit 38, and a DC/DC (direct current/direct current) booster 40. The energy storage component 34 is an ultracapacitor or a capacitor. The supercapacitor is a cermet yttrium oxide supercapacitor, an activated carbon supercapacitor, a platinum-based supercapacitor or a gold-based supercapacitor.

The DC/DC booster 40 has an input end and an output end. The input end of the DC/DC booster 40 is electrically connected to the thermoelectric chip 32. The output end of the DC/DC booster 40 is electrically connected to the energy storage element 34. And one end of the switch 36, the other end of the switch 36 is electrically connected to a battery or load 42 outside the thermoelectric conversion charging circuit 30. The switching control circuit 38 has a detecting end and a control end. The detecting end of the switching control circuit 38 is electrically connected to the output end of the DC/DC booster 40, the energy storage component 34 and the switch 36, and is switched. The control terminal of control circuit 38 controls the opening or closing of switch 36.

As described in the prior art, a thermoelectric wafer 32 mounted on a device capable of generating heat converts the thermal energy of the device into electrical energy. The DC/DC booster 40 is used to boost the voltage level of the thermoelectric chip 32. The energy storage component 34 is used to store the electrical energy outputted from the output of the DC/DC booster 40. Since the DC/DC booster 40 raises the voltage level of the thermoelectric chip 32 to a higher voltage level, the energy storage is performed. The storage of the electrical energy output by the DC/DC booster 40 by the component 34 also raises the voltage level of the energy storage component 34, so that the energy storage component 34 can provide a higher voltage level to the high voltage level battery or load 42.

The detecting end of the switching control circuit 38 detects the voltage level of the energy storage component 34. When the switching control circuit 38 detects that the voltage level of the energy storage component 34 is greater than or equal to a predetermined voltage value, the control terminal of the switching control circuit 38 The control switch 36 is turned from the open state to the closed state; when the switch control circuit 38 detects that the voltage level of the energy storage component 34 is less than the preset voltage value, the control terminal of the switch control circuit 38 controls the switch 36 to be in an open state. When the switch 36 is in the closed state, the electrical energy output by the energy storage element 34 charges or provides power to the battery or load 42.

The circuit configuration of the thermoelectric conversion charging circuit 30 of the second embodiment is compared to the circuit configuration of the thermoelectric conversion charging circuit 10 of the first embodiment, since the DC/DC booster 40 is disposed between the thermoelectric chip 32 and the energy storage element 34. The energy storage component 34 of the thermoelectric conversion charging circuit 30 can provide a higher voltage level to the high voltage level battery or load 42 for charging or providing power.

Fig. 3 is a circuit diagram of a thermoelectric conversion charging circuit of a third embodiment of the present invention. In FIG. 3, the thermoelectric conversion charging circuit 50 includes a thermoelectric chip 52, an energy storage element 54, a switch 56, a switching control circuit 58, and a DC/DC booster 60. The energy storage component 54 is an ultracapacitor or a capacitor. The supercapacitor is a cermet yttrium oxide supercapacitor, an activated carbon supercapacitor, a platinum-based supercapacitor or a gold-based supercapacitor.

The energy storage component 54 is electrically connected to the thermoelectric wafer 52. The DC/DC booster 60 has an input end and an output end. The input end of the DC/DC booster 60 is electrically connected to the thermoelectric chip 52 and the energy storage component 54. The output end of the DC/DC booster 60 is electrically connected. At one end of the switch 56, the other end of the switch 56 is electrically connected to the heat The battery or load 62 external to the charging circuit 50 is electrically converted. The switching control circuit 58 has a detecting end and a control end. The detecting end of the switching control circuit 58 is electrically connected to the output end of the DC/DC booster 60 and the end of the switch 56, and the control of the switching control circuit 58 is controlled. The end controls the opening or closing of the switch 56.

As described in the prior art, a thermoelectric wafer 52 mounted on a device capable of generating heat converts the thermal energy of the device into electrical energy. The energy storage component 54 is used to store the electrical energy converted by the thermoelectric wafer 52. As the electrical energy stored by the energy storage component 54 increases, the voltage level of the energy storage component 54 also increases. The DC/DC booster 60 is used to boost the voltage level of the energy storage component 54. When the thermoelectric conversion charging circuit 50 needs to provide a higher voltage level to the battery or load 62, the DC/DC booster 60 will store energy. The voltage level of component 54 is raised to the voltage level required by the battery or load 62.

The detecting end of the switching control circuit 58 detects the voltage level of the output of the DC/DC booster 60. When the switching control circuit 58 detects that the voltage level of the output of the DC/DC booster 60 is greater than or equal to a predetermined voltage. At the time of the value, the control terminal of the switching control circuit 58 controls the switch 56 to be in the closed state from the open state; when the switching control circuit 58 detects that the voltage level at the output of the DC/DC booster 60 is less than the preset voltage value, the switching control circuit The control terminal control switch 56 of 58 is in an open state. When the switch 56 is in the closed state, the electrical energy output by the DC/DC booster 60 charges or provides power to the battery or load 62.

The circuit configuration of the thermoelectric conversion charging circuit 50 of the third embodiment is compared with the circuit configuration of the thermoelectric conversion charging circuit 30 of the second embodiment, due to DC/DC The booster 60 is disposed on the rear side of the energy storage component 54, the thermoelectric conversion charging circuit 50 can use the low voltage level energy storage component 54, and the low voltage level energy storage component 54 is lower in component price, thus the thermoelectric The cost of switching the charging circuit 50 is lower than that of the thermoelectric conversion charging circuit 30 of the second embodiment.

The invention provides a novel structure of a thermoelectric conversion charging circuit, which uses the thermoelectric energy conversion of a thermoelectric chip to store the converted electrical energy in the energy storage component, and when the switching control circuit detects the voltage level of the energy storage component is greater than or equal to one When the voltage value is preset, the switching control circuit controls the switch to close so that the energy storage element charges the battery or supplies power to the load.

The present invention has been described above with reference to the preferred embodiments and the accompanying drawings, and should not be considered as limiting. Various modifications, omissions and changes may be made without departing from the scope of the invention.

10‧‧‧ Thermoelectric conversion charging circuit

12‧‧‧ Thermoelectric Wafer

14‧‧‧ Energy storage components

16‧‧‧ switch

18‧‧‧Switching control circuit

22‧‧‧Battery or load

30‧‧‧ Thermoelectric conversion charging circuit

32‧‧‧Thermal chip

34‧‧‧ Energy storage components

36‧‧‧Switch

38‧‧‧Switching control circuit

40‧‧‧DC/DC booster

42‧‧‧Battery or load

50‧‧‧ Thermoelectric conversion charging circuit

52‧‧‧Thermal chip

54‧‧‧ Energy storage components

56‧‧‧ switch

58‧‧‧Switching control circuit

60‧‧‧DC/DC booster

62‧‧‧Battery or load

1 is a circuit diagram of a thermoelectric conversion charging circuit according to a first embodiment of the present invention; FIG. 2 is a circuit diagram of a thermoelectric conversion charging circuit according to a second embodiment of the present invention; and FIG. 3 is a thermoelectric conversion according to a third embodiment of the present invention. Circuit diagram of the charging circuit.

10‧‧‧ Thermoelectric conversion charging circuit

12‧‧‧ Thermoelectric Wafer

14‧‧‧ Energy storage components

16‧‧‧ switch

18‧‧‧Switching control circuit

22‧‧‧Battery or load

Claims (6)

A thermoelectric conversion charging circuit comprising: a thermoelectric wafer for converting thermal energy into electrical energy; an energy storage component electrically connected to the thermoelectric wafer for storing electrical energy converted by the thermoelectric wafer; and a switch having one end electrically Connected to the thermoelectric chip and the energy storage device; and a switching control circuit, the detecting end is electrically connected to the thermoelectric chip, the energy storage element and the end of the switch, and the control end controls the opening of the switch or Closed, wherein when the switching control circuit detects that the voltage level of the energy storage component is greater than or equal to a predetermined voltage value, the switching control circuit controls the switch to be in an open state from the open state, and the energy storage component passes the switch The output power charges or supplies power to a battery or load. A thermoelectric conversion charging circuit comprising: a thermoelectric chip for converting thermal energy into electrical energy; a booster having an input end electrically connected to the thermoelectric chip for boosting a voltage level of the thermoelectric chip; The component is electrically connected to the output end of the booster for storing the electrical energy output by the booster; a switch having one end electrically connected to the output end of the booster and the energy storage component; a switching control circuit, the detecting end is electrically connected to the output end of the booster, the energy storage component and the end of the switch, and the control end controls opening or closing of the switch, wherein when the switching control circuit When detecting that the voltage level of the energy storage component is greater than or equal to a predetermined voltage value, the switching control circuit controls the switch to be in an open state from an open state, and the energy storage component outputs power to charge a battery or a load via the switch. Or provide power. A thermoelectric conversion charging circuit comprising: a thermoelectric wafer for converting thermal energy into electrical energy; an energy storage component electrically connected to the thermoelectric wafer for storing electrical energy converted by the thermoelectric wafer; and a booster The input end is electrically connected to the thermoelectric chip and the energy storage component for raising the voltage level of the energy storage component; a switch having one end electrically connected to the output end of the booster; and a switching control circuit, The detecting end is electrically connected to the output end of the booster and the end of the switch, and the control end controls the opening or closing of the switch, wherein when the switching control circuit detects the voltage of the output end of the booster When the level is greater than or equal to a predetermined voltage value, the switching control circuit controls the switch to be in an open state from the open state, and the booster outputs power through the switch to charge or provide power to a battery or load. The thermoelectric conversion charging circuit of any one of claims 1 to 3, wherein the energy storage component is one of an ultracapacitor and a capacitor. For example, the thermoelectric conversion charging circuit of claim 4, wherein the supercapacitor is one of a cermet ytterbium oxide supercapacitor, an activated carbon supercapacitor, a platinum-based supercapacitor, and a gold-based supercapacitor. A thermoelectric conversion charging circuit according to claim 2 or 3, wherein the booster is a DC/DC booster.