CN202662739U - Charging temperature adjusting device of lithium polymer battery - Google Patents

Abstract

The utility model discloses a temperature regulating device for charging a lithium polymer battery, comprising: a lithium polymer battery; a temperature sensor for monitoring the temperature of the lithium polymer battery and converting it into a signal for a battery charging temperature protection module; a battery charging temperature protection module According to the signal provided by the temperature sensor, the polarity of the semiconductor cooling chip is switched; the semiconductor cooling chip cools or heats up according to the power supply of different polarities, and exchanges heat with the lithium polymer battery. The utility model utilizes the principle that the semiconductor refrigerating sheet can both heat and cool down through the two-pole commutation to regulate the temperature of the lithium polymer battery. When the charging temperature of the lithium polymer battery is too low, the temperature of the battery can be raised; when the charging temperature of the lithium polymer battery is too high, the temperature of the battery can be lowered.

Description

Temperature regulation device for lithium polymer battery charging

technical field

The utility model relates to a temperature regulating device for charging lithium polymer batteries by wind power generation and solar photovoltaic power generation.

Background technique

Wind power generation and solar photovoltaic power generation are random intermittent power sources. For stable use, it is a common method to charge the battery first and then use electricity. Lithium polymer battery has the advantages of high energy density, large charging current, environmental protection, no memory effect, low self-discharge rate, etc. It is a battery suitable for wind power generation and solar photovoltaic power generation.

The discharge temperature of lithium polymer batteries is from -20°C to 60°C, and even the discharge temperature can be wider. But the charging temperature of lithium polymer battery is from 0°C to 45°C. Charging a lithium polymer battery at a lower or higher temperature will cause damage to the lithium polymer battery.

Wind power generation equipment and solar photovoltaic power generation equipment are often installed in areas with cold winters, hot summers, and areas with large temperature differences between day and night. The ambient temperature in these areas will exceed the charging temperature range of lithium polymer batteries. In order to ensure the service life of the lithium polymer battery, it is necessary to carry out charging temperature protection. In order for the lithium polymer battery to be able to accept charging at various ambient temperatures, a suitable temperature regulation device is necessary.

The currently disclosed battery temperature adjustment device has the following problems for use in wind power generation and solar photovoltaic power generation:

(1) There is only a heating device, or only a cooling device, and there is no device that can heat and cool at the same time. If it is used in wind power generation and solar photovoltaic power generation, it is necessary to replace the heat preservation device according to the seasons, especially not suitable for areas with large temperature differences.

(2) Use a constant power supply for temperature regulation. However, wind power generation and solar photovoltaic power generation are random intermittent power sources, which will not provide power to the battery for a long time, and developers do not expect to use the electricity of the battery itself for temperature regulation.

(3) Mainly focus on considering the temperature range control of the battery. However, wind power generation and solar photovoltaic power generation are random and intermittent power sources. If they cannot be quickly and efficiently charged into the battery, this part of the power will be wasted.

Utility model content

The utility model aims to provide a temperature regulating device suitable for charging lithium polymer batteries by wind power generation and solar photovoltaic power generation; it is realized by the following technical solutions:

A temperature regulating device for charging a lithium polymer battery, characterized in that it includes: a lithium polymer battery; a temperature sensor that monitors the temperature of the lithium polymer battery and converts the temperature into a signal for the battery charging temperature protection module; the battery charging temperature protection module According to the signal provided by the temperature sensor, the polarity of the semiconductor cooling chip is switched; the semiconductor cooling chip cools or heats up according to the power supply of different polarities, and exchanges heat with the lithium polymer battery.

The temperature regulating device for charging the lithium polymer battery also includes a battery protection plate, which is located at the end of the lithium polymer battery, and the battery charging temperature protection module is arranged inside.

The above-mentioned temperature regulating device for charging the lithium polymer battery also includes a heat conduction carrier, which is arranged on the periphery of the lithium polymer battery.

The above-mentioned temperature regulating device for charging the lithium polymer battery further includes a heat insulation layer arranged on the periphery of the heat conduction carrier, and the semiconductor refrigeration sheet is arranged on the installation position on the heat insulation layer.

The above-mentioned temperature regulating device for charging the lithium polymer battery also includes a cooling fan, which is arranged on one side of the semiconductor cooling plate.

The battery charging temperature protection module includes: a charging switch element, a charging switch driving resistor, a processing unit power supply module, a processing unit, a first triode, a second triode, a third triode, a fourth triode, The first triode driving resistor and the second triode driving resistor; the charging switch element is turned on or off by the processing unit through the charging switch driving resistor; the processing unit is driven by the first triode driving resistor and the second triode driving resistor The resistance controls the first triode, the second triode, the third triode, and the fourth triode, and outputs power in different polarities to the semiconductor cooling chip; the lithium polymer battery is used for processing through the power supply module of the processing unit. unit powered.

The utility model utilizes the principle that the semiconductor refrigerating sheet can both heat and cool down through the two-pole commutation to regulate the temperature of the lithium polymer battery. When the charging temperature of the lithium polymer battery is too low, the temperature of the battery can be raised; when the charging temperature of the lithium polymer battery is too high, the temperature of the battery can be lowered. The utility model is very suitable for random and intermittent power sources such as wind power generation and solar photovoltaic power generation.

Description of drawings

Accompanying drawing 1 is the system schematic diagram of the temperature regulating device provided by the embodiment.

Accompanying drawing 2 is the structural principle diagram of the temperature adjustment device provided by the embodiment.

Accompanying drawing 3 is the schematic circuit diagram of the temperature regulating device provided by the embodiment.

Detailed ways

As shown in FIG. 1 , the temperature adjustment device provided in this embodiment includes: a battery charging temperature protection module 101 , a temperature sensor 102 , a semiconductor cooling chip 103 , and a lithium polymer battery 104 . The lithium polymer battery 104 can be a single lithium polymer cell or a battery pack of more than one cell. The temperature sensor 102 cooperates with the lithium polymer battery 104 in heat exchange, and converts the sensed temperature into an electrical data signal. The battery charging temperature protection module 101 receives the data signal provided by the temperature sensor 102, obtains the current temperature of the lithium polymer battery 104 through analysis, and judges whether it needs to be heated or cooled, thereby controlling its supply direction to the semiconductor cooling plate 103. The semiconductor refrigerating sheet 103 is an original element that utilizes the hot spot effect to heat or cool, and only needs to reverse the positive and negative poles of the input direct current to realize heating or cooling.

The working principle of the above-mentioned temperature regulating device is: when the external wind power and solar photovoltaic power are ready to be charged, and the temperature sensor 102 detects that the temperature of the lithium polymer battery 104 is high or low, the external power first charges the battery. The temperature protection module 101 passes electricity in different polarities to the semiconductor cooling chip 103 to cool down or heat up the battery 104, until the temperature sensor 102 detects that the temperature is within the charging temperature range, the external power supply charges the battery 104 through the battery charging temperature protection module 101, And at the same time, the external power supply still distributes a part of power to the semiconductor cooling chip 103, so that the temperature of the battery 104 is maintained within a certain temperature range.

The above structure is the principle structure to realize the purpose of the utility model. When it is actually applied as a product, as shown in FIG.

The lithium polymer battery 104, the temperature sensor 102, and the battery protection plate 201 are fixed inside the device structure. The battery protection board 201 is located at the end of the lithium polymer battery, and the battery charging temperature protection module 101 is arranged inside it. The heat conduction carrier 202 is disposed on the periphery of the lithium polymer battery 104 . Semiconductor refrigeration sheet 103, heat insulation layer 203, cooling fan 204 are fixed on the outside of this device. The circuit of the battery charging temperature protection module 101 is connected to the circuit of the temperature sensor 102 , and the circuit of the battery charging temperature protection module 101 is also connected to the circuit of the semiconductor cooling chip 103 .

The function of the heat conduction carrier 202 is to make the temperature of the lithium polymer battery 104 uniform. The heat conduction carrier 202 can be a heat carrier such as a solid, a liquid, a solid-liquid mixture, a gas, a liquid wrapped in a container, or a solid wrapped in a container. It is also possible to use the material of the lithium polymer battery 104 itself as the heat conduction carrier. The heat insulation layer 203 is arranged on the periphery of the heat conduction carrier 202, and its function is to reduce unnecessary temperature exchange between the lithium polymer battery 104 and the external environment, so as to save power consumption of the device. The heat insulation layer 203 may be a material with heat insulation effect, a coating with heat insulation effect, a vacuum structure, a sandwich structure, etc., and may not use a heat insulation layer structure. The semiconductor cooling sheet 103 is arranged on the installation position on the heat insulation layer 203, and the cooling fan 204 is arranged on one side of the semiconductor cooling sheet 103, and its effect is to further help the semiconductor cooling sheet 103 to cool down the lithium polymer battery 104.

The specific circuit of the utility model device is shown in Figure 3, wherein the battery charging temperature protection module 101 includes: a charging switch element 301, a charging switch driving resistor 302, a processing unit power supply module 303, a processing unit 304, a first triode 305 , the second triode 306 , the third triode 307 , the fourth triode 308 , the first triode driving resistor 309 , and the second triode driving resistor 310 .

The charging switch element 301 is turned on or off by the processing unit 304 through the charging switch driving resistor 302. When the charging switch element 301 is turned on, the lithium polymer battery 104 is charged by external wind power and solar photovoltaic power generation, and the charging switch element 301 is turned off. When it is turned on, the external wind power and solar photovoltaic power sources stop charging the lithium polymer battery 104 .

The processing unit 304 processes the first triode 305, the second triode 306, the third triode 307, and the fourth triode 308 through the first triode driving resistor 309 and the second triode driving resistor 310. control. In this way, the processing unit 304 can give different signals to make the peltier refrigerating chip 103 be heated, cooled, or powered off.

The lithium polymer battery 104 supplies power to the processing unit 304 through the processing unit power supply module 303 . Under suitable circumstances, the lithium polymer battery 104 can also directly power the processing unit 304 .

The above embodiments are only fully disclosed and do not limit the utility model. The equivalent replacement and expansion of the number of the same feature points based on the creative spirit of the utility model without creative work should all belong to the scope disclosed by the utility model. For example, the temperature sensor can be For multiple to achieve the detection of multi-point temperature.

Claims (6)

1. A temperature regulating device for charging a lithium polymer battery, characterized in that it includes: a lithium polymer battery; a temperature sensor that monitors the temperature of the lithium polymer battery and converts it into a signal for the battery charging temperature protection module; battery charging temperature The protection module switches the direction of power supply to the semiconductor cooling sheet according to the signal provided by the temperature sensor; the semiconductor cooling sheet cools or heats up according to the power supply in different directions, and exchanges heat with the lithium polymer battery. 2 . The temperature regulating device according to claim 1 , further comprising a battery protection plate, located at the end of the lithium polymer battery, in which the battery charging temperature protection module is arranged. 3 . 3. The temperature regulating device according to claim 2, characterized in that it further comprises a heat conduction carrier disposed on the periphery of the lithium polymer battery. 4 . The temperature adjusting device according to claim 3 , further comprising a heat insulation layer disposed on the periphery of the heat conduction carrier, and the semiconductor cooling chip is disposed on a mounting position on the heat insulation layer. 5 . 5. The temperature adjusting device according to claim 4, characterized in that it further comprises a cooling fan, which is arranged on one side of the semiconductor cooling plate. 6. The temperature regulating device according to any one of claims 1 to 5, characterized in that: the battery charging temperature protection module includes: a charging switch element, a charging switch driving resistor, a processing unit power supply module, a processing unit, a first triode, the second triode, the third triode, the fourth triode, the first triode driving resistor and the second triode driving resistor; the charging switch element is conducted by the processing unit through the charging switch driving resistor on or off; the processing unit controls the first triode, the second triode, the third triode, and the fourth triode through the first triode driving resistor and the second triode driving resistor, Output power in different polarities to the semiconductor cooling chip; the lithium polymer battery supplies power to the processing unit through the processing unit power supply module.

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