Waste heat recovery system for formation and capacity grading power supply equipment

Abstract

The utility model discloses a waste heat recovery system for formation and capacity grading power supply equipment. The waste heat recovery system comprises a heat pump evaporation subsystem, a heat pump condensation subsystem and a high-temperature dehumidifier, the heat pump evaporation subsystem exchanges heat with the high-temperature dehumidifier through the heat pump condensation subsystem; the high-temperature dehumidifier is used for dehumidifying the formation workshop; the heat pump condensation subsystem comprises a condensation heat exchanger, a water supply heat storage water tank and a water return heat storage water tank; the condensation heat exchanger exchanges heat with the heat pump evaporation subsystem; a water outlet of the condensation heat exchanger is sequentially connected with a water supply heat storage water tank, a high-temperature dehumidifier and a water return heat storage water tank through pipelines. A water outlet of the backwater heat storage water tank is communicated with a water inlet of the condensation heat exchanger; according to the utility model, the recycling rate of waste heat in the lithium battery production process is improved, and the shutdown fault of capacity grading equipment caused by high temperature is avoided; and the electric heating energy consumption of the formation dehumidifier is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and particularly relates to a waste heat recovery system for a formation and grading power supply device. Background Art

[0002] At present, most of the grading equipment in lithium battery factories adopts a split design, and the heat dissipation of the equipment power cabinet uses the environmental self-heat dissipation method. During the production process, due to its own internal resistance, part of the electric energy of the power cabinet is converted into heat energy. In the current self-heat dissipation mode, the heat dissipation rate is slow, resulting in the temperature of the power cabinet area being about 10°C higher than the environment. Especially in hot summer, the high-temperature environment will accelerate the aging speed of the electronic components inside the power cabinet, and at the same time, the high-temperature environment will bring many inconveniences to equipment maintenance and daily production work.

[0003] Due to process requirements, the high-temperature formation workshop requires a high-temperature environment of 45°C all year round, and the humidity control is relatively strict. The dew point temperature needs to reach about -40°C; the wheel dehumidifier and auxiliary heat source form are used for temperature and humidity control, resulting in huge energy consumption. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat recovery system for a formation and grading power supply device, which can effectively improve the resource recycling rate of waste heat in the lithium battery production process, avoid the shutdown failure of the grading equipment caused by high temperature, and reduce the electric heating energy consumption of the formation dehumidifier.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A waste heat recovery system for a formation and grading power supply device includes a heat pump evaporation subsystem, a heat pump condensation subsystem, and a high-temperature dehumidifier; the heat pump evaporation subsystem exchanges heat with the high-temperature dehumidifier through the heat pump condensation subsystem; the high-temperature dehumidifier is used for dehumidifying the formation workshop.

[0007] The heat pump condensation subsystem includes a condensation heat exchanger, a water supply storage water tank, and a return water storage water tank; the condensation heat exchanger exchanges heat with the heat pump evaporation subsystem; the water outlet of the condensation heat exchanger is connected to the water supply storage water tank, the high-temperature dehumidifier, and the return water storage water tank in sequence through a pipeline; the water outlet of the return water storage water tank is communicated with the water inlet of the condensation heat exchanger.

[0008] Preferably, the heat pump evaporation subsystem includes a grading power cabinet and an evaporation heat exchanger; the air outlet of the grading power cabinet is connected to the air inlet of the evaporation heat exchanger through an exhaust duct; the air inlet of the grading power cabinet is connected to the air outlet of the evaporation heat exchanger through a supply duct; the evaporation heat exchanger is connected to the condensation heat exchanger through a refrigerant copper pipe.

[0009] Preferably, an exhaust fan is provided on the exhaust duct; the exhaust fan is a centrifugal fan.

[0010] Preferably, a first valve group is provided on the connecting pipeline between the water supply and hot water storage tank and the high-temperature dehumidifier; a second valve group is provided on the connecting pipeline between the water outlet of the return water storage tank and the water inlet of the condensation heat exchanger.

[0011] Preferably, the high-temperature dehumidifier is communicated with the forming workshop through a pipeline; a heating coil is arranged in the high-temperature dehumidifier, and the water inlet and outlet of the heating coil are respectively connected to the water supply and hot water storage tank and the return water storage tank through pipelines; the heating coil is used to heat the air flow sent into the forming workshop.

[0012] Preferably, an auxiliary electric heater and a temperature sensor are arranged on the pipeline between the high-temperature dehumidifier and the forming workshop, and the auxiliary electric heater and the temperature sensor are electrically connected to the controller; when the detected temperature of the temperature sensor is less than the set temperature threshold, the controller controls the auxiliary electric heater to be turned on; when the detected temperature of the temperature sensor is greater than or equal to the set temperature threshold, the controller controls the auxiliary electric heater to be turned off.

[0013] Preferably, the high-temperature dehumidifier is set as a rotary dehumidifier.

[0014] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0015] The heat pump condensation subsystem of the present utility model includes a condensation heat exchanger, a water supply and hot water storage tank, and a return water storage tank; the condensation heat exchanger exchanges heat with the heat pump evaporation subsystem; the water outlet of the condensation heat exchanger is connected to the water supply and hot water storage tank, the high-temperature dehumidifier, and the return water storage tank in sequence through a pipeline; the water outlet of the return water storage tank is communicated with the water inlet of the condensation heat exchanger; the high-temperature dehumidifier is used to dehumidify the forming workshop; the heat pump condensation subsystem absorbs energy from the heat pump evaporation subsystem and then re-uses the absorbed energy to the high-temperature dehumidifier, effectively improving the resource utilization rate of the waste heat discharged during the lithium battery production process, avoiding the shutdown failure of the grading equipment caused by high temperature, and at the same time reducing the electric heating energy consumption of the forming dehumidifier. Description of the Drawings

[0016] Figure 1 It is a structural diagram of the waste heat recovery system of the forming and grading power supply equipment provided in this embodiment.

[0017] In the figure, 1 is an exhaust duct; 2 is an exhaust fan; 3 is a supply duct; 4 is a heat pump evaporator; 5 is a refrigerant copper pipe; 6 is a heat pump condenser; 7 is a water supply and hot water storage tank; 8 is a return water storage tank; 9 is a high-temperature dehumidifier; 10 is a heating coil; 11 is a forming workshop; 12 is a grading power cabinet; 13 is a water pipe valve group; 14 is an auxiliary electric heater; 15 is a temperature sensor. Detailed Embodiments

[0018] The present utility model will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and cannot be used to limit the protection scope of the present utility model.

[0019] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and does not require the present utility model to be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. The terms "front", "rear", "left", "right", "upper", "lower" used in the description of the present utility model refer to the directions in the accompanying drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0020] As Figure 1 shown, a waste heat recovery system for a formation and grading power supply device includes a heat pump evaporation subsystem, a heat pump condensation subsystem, and a high-temperature dehumidifier 9; the heat pump evaporation subsystem exchanges heat with the high-temperature dehumidifier 9 through the heat pump condensation subsystem.

[0021] The heat pump evaporation subsystem includes a grading power supply cabinet 12 and an evaporation heat exchanger 4; the air outlet of the grading power supply cabinet 12 is connected to the air inlet of the evaporation heat exchanger 4 through an exhaust duct 1; the air inlet of the grading power supply cabinet 12 is connected to the air outlet of the evaporation heat exchanger 4 through a supply duct; an exhaust fan 2 is provided on the exhaust duct 1; the exhaust fan 3 is a centrifugal fan.

[0022] The heat pump condensation subsystem includes a condensation heat exchanger 6, a water supply storage water tank 7, and a return water storage water tank 8; the evaporation heat exchanger 4 is connected to the condensation heat exchanger 6 through a refrigerant copper pipe 5, and the refrigerant copper pipe 5 is provided with condensate to realize heat exchange between the condensation heat exchanger 6 and the evaporation heat exchanger 4; the water outlet of the condensation heat exchanger 6 is sequentially connected to the water supply storage water tank 7, the heating coil 10 of the high-temperature dehumidifier 9, and the return water storage water tank 8 through pipelines; the water outlet of the return water storage water tank 8 is connected to the water inlet of the condensation heat exchanger 6.

[0023] A first valve group is provided on the connecting pipeline between the water supply storage water tank 7 and the heating coil 10 of the high-temperature dehumidifier 9; a second valve group is provided on the connecting pipeline between the water outlet of the return water storage water tank 8 and the water inlet of the condensation heat exchanger 6; the first valve group and the second valve group form a water pipe valve group 13.

[0024] The high-temperature dehumidifier 9 is connected to the formation workshop 11 through a pipeline; the high-temperature dehumidifier 9 is used for dehumidifying the formation workshop 11; in this embodiment, the high-temperature dehumidifier 9 is set as a rotary dehumidifier; the heating coil 10 of the high-temperature dehumidifier 9 is used to heat the air flow sent into the formation workshop 11.

[0025] An auxiliary electric heater 14 and a temperature sensor 15 are provided on the pipeline between the high-temperature dehumidifier 9 and the formation workshop 11, and the auxiliary electric heater 14 and the temperature sensor 15 are electrically connected to the controller.

[0026] Working process: The grading power supply cabinet 12 generates waste heat, and the exhaust fan 2 drives the high-temperature gas in the grading power supply cabinet 12 to exchange heat with the heat pump evaporator 4 through the exhaust duct 1 to form cold air. The cold air is sent into the grading power supply cabinet 12 through the air supply duct 3 for heat dissipation and cooling, so as to avoid the shutdown failure of the grading power supply cabinet caused by too high temperature.

[0027] The heat pump evaporator 4 exchanges heat with the condensation heat exchanger 6 through the condensate. The water temperature in the condensation heat exchanger 6 rises, and the hot water in the condensation heat exchanger 6 enters the heating coil 10 of the high-temperature dehumidifier 9 through the water supply and hot water storage tank 7, and then flows back to the condensation heat exchanger 6 through the return water and hot water storage tank 8.

[0028] The heating coil 10 of the high-temperature dehumidifier 9 is used to heat the air flow sent into the formation workshop 11; when the detected temperature of the temperature sensor 15 is less than the set temperature threshold, the controller controls the auxiliary electric heater 14 to turn on; when the detected temperature of the temperature sensor 15 is greater than or equal to the set temperature threshold, the controller controls the auxiliary electric heater 14 to turn off, so as to ensure that the temperature range of the formation workshop 11 is 40°C ± 3°C and the dew point temperature is less than -40°C.

[0029] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A waste heat recovery system for a chemical component power supply device, characterized in that: It includes a heat pump evaporation subsystem, a heat pump condensation subsystem and a high-temperature dehumidifier; the heat pump evaporation subsystem performs heat exchange with the high-temperature dehumidifier through the heat pump condensation subsystem; the high-temperature dehumidifier is used to dehumidify the chemical formation workshop; The heat pump condensation subsystem includes a condensing heat exchanger, a water supply heat storage tank and a return water heat storage tank; the condensing heat exchanger performs heat exchange with the heat pump evaporation subsystem; the water outlet of the condensing heat exchanger is connected to the water supply heat storage tank, the high-temperature dehumidifier and the return water heat storage tank in sequence through pipelines; the water outlet of the return water heat storage tank is connected to the water inlet of the condensing heat exchanger.

2. The waste heat recovery system for chemical component power supply equipment according to claim 1 is characterized in that: The heat pump evaporation subsystem includes a divided-capacity power supply cabinet and an evaporative heat exchanger; the air outlet of the divided-capacity power supply cabinet is connected to the air inlet of the evaporative heat exchanger through an exhaust pipe; the air inlet of the divided-capacity power supply cabinet is connected to the air outlet of the evaporative heat exchanger through an air supply pipe; the evaporative heat exchanger is connected to the condensing heat exchanger through a refrigerant copper tube.

3. The waste heat recovery system for power supply equipment according to claim 2 is characterized in that: An exhaust fan is arranged on the exhaust pipe; the exhaust fan is a centrifugal fan.

4. The waste heat recovery system for power supply equipment according to claim 1, characterized in that: A first valve group is arranged on the connecting pipeline between the water supply heat storage tank and the high-temperature dehumidifier; a second valve group is arranged on the connecting pipeline between the water outlet of the return water heat storage tank and the water inlet of the condensing heat exchanger.

5. The waste heat recovery system for chemical component power supply equipment according to claim 1, characterized in that: The high-temperature dehumidifier is connected to the chemical formation workshop through a pipeline; a heating coil is arranged in the high-temperature dehumidifier, and a water inlet and a water outlet of the heating coil are respectively connected to a water supply hot water storage tank and a return hot water storage tank through pipelines; the heating coil is used to heat the airflow sent into the chemical formation workshop.

6. The waste heat recovery system for power supply equipment according to claim 5, characterized in that: An auxiliary electric heater and a temperature sensor are arranged on the pipeline between the high-temperature dehumidifier and the chemical formation workshop, and the auxiliary electric heater and the temperature sensor are electrically connected to a controller; when the detected temperature of the temperature sensor is lower than a set temperature threshold, the controller controls the auxiliary electric heater to turn on; when the detected temperature of the temperature sensor is greater than or equal to the set temperature threshold, the controller controls the auxiliary electric heater to turn off.

7. The waste heat recovery system for power supply equipment according to claim 1, characterized in that: The high temperature dehumidifier is configured as a rotary dehumidifier.

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