Thermal power generation temperature control device and aluminum-air battery power generation temperature control system

Abstract

The invention discloses a heat energy power generation temperature control device which is characterized in that at least one side of a heat exchange plate is connected with a first thermoelectric semiconductor unit, and the first thermoelectric semiconductor unit is provided with a first radiating fin; a heating medium channel is arranged in the heat exchange plate, and the heating medium channel is provided with a heating medium inlet and a heating medium outlet in the heat exchange plate. Heat energy generated by aluminum air power generation can be recycled, and efficient heating or cooling of the aluminum air electrolyte can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum-air batteries, and in particular to a thermal energy power generation temperature control device and an aluminum-air battery power generation temperature control system. Background Art

[0002] Aluminum-air batteries will inevitably generate a lot of heat while operating efficiently. If this heat is not properly managed, the temperature fluctuation of the electrolyte will directly threaten the overall performance and safety of the battery.

[0003] In response to the problem of heat energy generated during the discharge of aluminum-air batteries, the industry currently generally adopts two traditional heat dissipation methods: air convection cooling and liquid cooling. However, both methods have obvious limitations. For example, the patent "CN202420363042.0-A device for cooling and dissipating heat for aluminum-air batteries" discloses a method in which a cooling fan helps the cavity to dissipate heat. Although air convection cooling is simple and easy, its heat transfer efficiency is relatively low, and it is difficult to meet the heat dissipation requirements of aluminum-air batteries when running under high load. And the cooling fan used in this method also consumes electrical energy, causing waste of the electrical energy generated by the aluminum-air battery. The heat dissipation effect of liquid cooling is better than that of air convection cooling, but the complex system design and high mass are also difficult to overcome shortcomings. More importantly, when the battery is in a low temperature environment, the battery system also needs to be equipped with an additional heating system to ensure the normal start-up of the battery, which undoubtedly increases the complexity and cost of the system.

[0004] Therefore, the industry currently needs an aluminum-air battery power generation temperature control system that can fully utilize the heat energy generated by aluminum-air power generation and reuse waste heat, while also achieving efficient heating or cooling of the aluminum-air electrolyte, reducing the heat dissipation and heating devices in the system, and reducing the complexity and cost of the aluminum-air battery system. Summary of the invention

[0005] In order to overcome the problems in the prior art, the purpose of the present invention is to provide a thermal power generation temperature control device and an aluminum-air battery power generation temperature control system, which can recover the heat energy generated by aluminum-air power generation and achieve efficient heating or cooling of the aluminum-air electrolyte.

[0006] To achieve the above-mentioned objectives, the present invention provides a thermal energy power generation temperature control device, comprising a heat exchange plate, wherein at least one side of the heat exchange plate is connected to a first thermoelectric semiconductor unit, and the first thermoelectric semiconductor unit is provided with a first heat dissipation fin; a heat medium channel is provided in the heat exchange plate, extending along a first direction of the heat dissipation surface and passing through the heat exchange plate, and the heat medium channel is provided with a liquid inlet and a liquid outlet on the heat exchange plate.

[0007] Furthermore, the heat exchange plate is connected to a second thermoelectric semiconductor unit, and the second thermoelectric semiconductor unit is provided with a second heat dissipation fin fixedly connected thereto.

[0008] Furthermore, a plurality of heat medium channels are arranged in the heat exchange plate along a second direction perpendicular to the first direction of the heat dissipation surface, wherein the liquid inlet and the liquid outlet are respectively arranged at the two outermost heat medium channel ports, and the ports of other adjacent heat medium channels are sealed and connected in sequence.

[0009] Furthermore, the first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit are both composed of a plurality of semiconductors connected together, and the first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit have the same composition structure, the first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit are connected in parallel, and the positive electrode of the first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit after being connected in parallel is led out from the first joint, and the negative electrode is led out from the second joint.

[0010] Furthermore, the contact surfaces of the first thermoelectric semiconductor unit, the heat exchange plate and the first heat dissipation fins, and the contact surfaces of the second thermoelectric semiconductor unit, the heat exchange plate and the second heat dissipation fins are tightly connected by high-temperature resistant thermal conductive adhesive, and the heat exchange plate is made of a material that is resistant to strong alkali corrosion and has good thermal conductivity.

[0011] The present application also provides an aluminum-air battery power generation temperature control system, comprising any one of the thermal power generation temperature control group devices, electrolyte tanks and battery stacks as described in claims 1-5, wherein the liquid outlet of the battery stack is connected to the liquid inlet of the thermal power generation temperature control device, the liquid outlet of the thermal power generation temperature control device is connected to the liquid inlet of the electrolyte tank, and the liquid outlet of the electrolyte tank is connected to the liquid inlet of the battery stack; characterized in that the battery stack is electrically connected to a unidirectional DC / DC converter, the unidirectional DC / DC converter is electrically connected to a bidirectional DC / DC converter, and the bidirectional DC / DC converter is electrically connected to the thermal power generation temperature control device; It also includes a temperature detection module, and the controlled end of the bidirectional DC / DC converter is connected to the control end of the temperature detection module.

[0012] Furthermore, the temperature detection module includes a temperature detection controller and a temperature sensor, the temperature detection controller and the temperature sensor are electrically connected, the control end of the temperature detection controller is connected to the controlled end of the bidirectional DC / DC converter, and the temperature sensor includes at least a battery stack electrolyte outlet temperature sensor, and the battery stack electrolyte outlet temperature sensor is arranged at the liquid outlet of the battery stack.

[0013] Furthermore, the temperature sensor also includes an electrolyte tank outlet temperature sensor and a heat exchange plate temperature sensor. The electrolyte tank outlet temperature sensor is arranged at the liquid outlet of the electrolyte tank, and the heat exchange plate temperature sensor is arranged on the heat exchange plate.

[0014] Furthermore, it also includes an energy storage battery, which is connected to the unidirectional DC / DC converter and the bidirectional DC / DC converter.

[0015] Furthermore, a circulation pump is provided between the electrolyte tank and the battery stack, and the energy storage battery is electrically connected to the circulation pump.

[0016] The present invention can efficiently recycle the heat energy generated by the aluminum-air battery during the power generation process through the thermal power generation temperature control device, and convert it into electrical energy, thereby realizing the reuse of waste heat and improving the overall efficiency of aluminum-air power generation. At the same time, through the control of the temperature detection module and the bidirectional DC / DC converter, the flow direction of the current can be flexibly switched to adjust the electrolyte temperature, reducing the heat dissipation module and heating module in the battery system, and reducing the complexity and cost of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of a thermal power generation temperature control device provided in Example 1 of the present invention; Figure 2 for Figure 1 AA section view in; Figure 3 for Figure 2 BB section view in; Figure 4 for Figure 3 Schematic diagram of the local structure; Figure 5 A three-dimensional schematic diagram of a thermal power generation temperature control device provided in Example 1 of the present invention; Figure 6 A schematic diagram of the structure of an aluminum-air battery power generation temperature control system provided in Example 2 of the present invention; Description of the drawings: Thermal power generation temperature control device 1, bidirectional DC / DC converter 2, temperature detection controller 3, unidirectional DC / DC converter 4, battery stack 5, electrolyte tank 6, circulation pump 7, third pipeline 8, second pipeline 9, first pipeline 10, battery stack electrolyte outlet temperature sensor 11, electrolyte tank outlet temperature 12, ambient temperature sensor 13, load 14, energy storage battery 15, first joint 101, second joint 102, inlet joint 103, outlet joint 104, heat exchange plate 105, first thermoelectric semiconductor integrated board 106, first heat dissipation fin 107, second thermoelectric semiconductor unit 108, second heat dissipation fin 109, U-shaped head 110, bolt 111, heat exchange plate temperature sensor 112, heat medium channel 113. DETAILED DESCRIPTION

[0018] Example 1 The present invention provides a thermal energy power generation temperature control device, such as Figure 1-5As shown, it includes: a first heat dissipation fin 107, a first thermoelectric semiconductor unit 106, a heat exchange plate 105, a second thermoelectric semiconductor unit 108, and a second heat dissipation fin 109. The heat exchange plate 105 is fixedly connected to the first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108, and the other sides of the first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108 are respectively fixedly connected to the first heat dissipation fin 107 and the second heat dissipation fin 109; the first heat dissipation fin 107, the first thermoelectric semiconductor unit 106, the heat exchange plate 105, the second thermoelectric semiconductor unit 108, and the second heat dissipation fin 109 are fixed by bolts 111. The contact surfaces between the first thermoelectric semiconductor unit 106 and the heat exchange plate 105, the first heat dissipation fin 107, and between the second thermoelectric semiconductor unit 108 and the heat exchange plate 105, the second heat dissipation fin 109 are coated with high temperature resistant heat conductive glue. The heat exchange plate 105 is made of a material that is resistant to strong alkali corrosion and has good thermal conductivity.

[0019] The first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit are composed of several thermoelectric semiconductor units connected in series and in parallel according to the voltage and current requirements, and the number of thermoelectric semiconductor units selected for the first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108 is the same as the series-parallel structure. (Semiconductor temperature difference power generation technology is a mature existing technology and has a wide range of applications in the fields of electronic components and energy conversion. Reference materials include the document "Lithium Battery Charging Device Based on Semiconductor Temperature Difference Power Generation Module" published in "Power Supply Technology" by Lin Yulan, Lv Yingyang, Liang Guang, and Chen Zhong with article number: 1002-087X (2006) 01-0038-03. The structure of the thermoelectric semiconductor integrated unit of this application adopts the existing technology and will not be repeated here.) The first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108 are connected in parallel, and the positive electrode of the first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108 after being connected in parallel is led out from the first joint 101, and the negative electrode is led out from the second joint 102.

[0020] A heat medium channel 113 is provided inside the heat exchange plate 105, which extends along a first direction of the heat dissipation surface and passes through the heat exchange plate 105. A plurality of heat medium channels 113 in the heat exchange plate 105 are provided along a second direction perpendicular to the first direction of the heat dissipation surface, wherein one of the two outermost heat medium channel 113 ports is sealed and connected to the inlet joint 103 as a liquid inlet, and the other is sealed and connected to the outlet joint 104 as a liquid outlet, and the ports of other adjacent heat medium channels 113 are sealed and connected in sequence through a U-shaped head 110.

[0021] Example 2 The present invention also provides an aluminum-air battery power generation temperature control system, including a thermal power generation temperature control device 1 as provided in Example 1, and also including a battery stack 5, a unidirectional DC / DC converter 4, a bidirectional DC / DC converter 2, a temperature detection controller 3, an electrolyte tank 6, an energy storage battery 15 and a circulation pump 7. The battery stack 5 is electrically connected to the positive and negative poles of the unidirectional DC / DC converter 4, the unidirectional DC / DC converter 4 is electrically connected to the positive and negative poles of the bidirectional DC / DC converter 2, the bidirectional DCDC converter is electrically connected to the positive and negative poles of the thermal power generation temperature control device, and the unidirectional DC / DC converter 4 and the bidirectional DC / DC converter 2 are also connected to the energy storage battery 15 respectively.

[0022] The liquid outlet of the thermal power generation and temperature control device 1 is sealed and connected to the outlet joint 104, the liquid inlet of the top heat medium channel 113 is sealed and connected to the inlet joint 103, the liquid outlet of the electrolyte in the battery stack 5 is connected to the inlet joint 103 of the liquid inlet of the thermal power generation and temperature control device 1 through the first pipe 10, the liquid inlet of the electrolyte tank 6 is connected to the outlet joint 104 of the liquid outlet of the thermal power generation and temperature control device 1 through the second pipe 9, the liquid outlet of the electrolyte tank 6 is connected to the liquid inlet of the battery stack 5 through the third pipe 8, and a circulating pump 7 is also provided between the electrolyte tank 6 and the battery stack 5.

[0023] The control end of the temperature detection controller 3 is connected to the controlled end of the bidirectional DC / DC converter 2, and the temperature detection controller 3 is connected to several temperature sensors, which at least include a stack electrolyte outlet temperature sensor 11, an electrolyte tank outlet temperature sensor 12, and a heat exchange plate temperature sensor 112. The stack electrolyte outlet temperature sensor 11 is arranged at the outlet of the stack 5, the electrolyte tank outlet temperature sensor 12 is arranged at the outlet of the electrolyte tank 6, and the heat exchange plate temperature sensor 112 is arranged on the heat exchange plate. The temperature sensor may also include an ambient temperature sensor 13, which is used to detect the internal temperature of the aluminum-air battery power generation temperature control system.

[0024] The temperature detection controller 3 receives temperature signals from the ambient temperature sensor 13, the battery stack electrolyte outlet temperature sensor 11, the heat exchange plate temperature sensor 112, and the electrolyte tank outlet temperature 12, and performs analysis and judgment based on these signals, thereby controlling the working state of the bidirectional DC / DC converter 2, and switching the power generation temperature control device 1 between the power generation state, the cooling state, and the heating state.

[0025] The method for the temperature detection controller 3 to control the working direction of the bidirectional DC / DC converter to convert electric energy is specifically as follows: Aluminum air stack generates a large amount of heat during the power generation process, and most of this heat is taken out through the electrolyte. The normal temperature range of the electrolyte is preset. When the temperature detection controller 3 detects that the electrolyte temperature is within the normal temperature range, the temperature detection controller 3 controls the bidirectional DC / DC converter 2 to work in the forward direction. The electrolyte flows through the thermal power generation temperature control device 1, and the electrolyte heat is transferred to the first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108 on both sides thereof by the heat exchange plate 105. At this time, there is a temperature difference between the inside and outside of the first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108, and power generation begins. The electric energy output by the thermal power generation temperature control device 1 is output to the load 4 after being stabilized by the bidirectional DC / DC converter 2.

[0026] When the temperature detection controller 3 detects that the electrolyte temperature is lower than the normal temperature range, the temperature detection controller 3 controls the bidirectional DC / DC converter 2 to work in reverse, and the electric energy output by the battery stack 5 is supplied to the thermal energy generation temperature control device 1 through the unidirectional DC / DC converter 4 and the bidirectional DC / DC converter 2. At this time, heat is generated inside the first thermoelectric semiconductor unit 106 and the second thermoelectric semiconductor unit 108, and the heat is transferred to the electrolyte through the heat exchange plate 105 to achieve heating of the electrolyte.

[0027] When the temperature detection controller 3 detects that the electrolyte temperature exceeds the normal temperature range, the temperature detection controller 3 controls the bidirectional DC / DC converter 2 to work in reverse, and at the same time switches the positive and negative poles of the bidirectional DC / DC converter 2 connected to the first thermoelectric semiconductor integrated unit 106 and the second thermoelectric semiconductor integrated unit 108. At this time, the thermoelectric semiconductor integrated unit 106 and the thermoelectric semiconductor integrated unit 108 will produce a low temperature zone under the reaction of the current, and the heat of the electrolyte will be consumed through the heat exchange plate 105, thereby achieving cooling and heat dissipation of the electrolyte.

[0028] The energy storage battery 15 is electrically connected to the circulation pump 7. The energy storage battery 15 can provide power to the circulation pump 7 when the battery stack is just started, can supply power to the load 14 when the battery stack 5 generates insufficient power, and can also provide power to the power generation temperature control device 1 when the bidirectional DC / DC converter 2 is working in reverse.

Claims

1. A thermal power generation temperature control device, characterized in that: It comprises a heat exchange plate, at least one side of which is connected to a first thermoelectric semiconductor unit, and the first thermoelectric semiconductor unit is provided with a first heat dissipation fin; a heat medium channel is provided in the heat exchange plate, which extends along a first direction of the heat dissipation surface and passes through the heat exchange plate, and the heat medium channel is provided with a liquid inlet and a liquid outlet on the heat exchange plate.

2. A thermal power generation temperature control group device as claimed in claim 1, characterized in that: The heat exchange plate is connected to a second thermoelectric semiconductor unit, and the second thermoelectric semiconductor unit is provided with a second heat dissipation fin fixedly connected thereto.

3. A thermal power generation temperature control group device as claimed in claim 1, characterized in that: There are multiple heat medium channels in the heat exchange plate along a second direction perpendicular to the first direction of the heat dissipation surface, wherein the liquid inlet and the liquid outlet are respectively arranged at the two outermost heat medium channel ports, and the ports of other adjacent heat medium channels are sealed and connected in sequence.

4. A thermal power generation temperature control group device as claimed in claim 1, characterized in that: The first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit are both composed of a plurality of semiconductors connected together, and the first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit have the same composition structure. The first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit are connected in parallel, and the positive electrode of the first thermoelectric semiconductor unit and the second thermoelectric semiconductor unit after being connected in parallel is led out from the first joint, and the negative electrode is led out from the second joint.

5. A thermal power generation temperature control group device as claimed in claim 1, characterized in that: The contact surfaces of the first thermoelectric semiconductor unit, the heat exchange plate and the first heat dissipation fins and the contact surfaces of the second thermoelectric semiconductor unit, the heat exchange plate and the second heat dissipation fins are tightly connected by high-temperature resistant thermal conductive adhesive. The heat exchange plate is made of a material that is resistant to strong alkali corrosion and has good thermal conductivity.

6. An aluminum-air battery power generation temperature control system, comprising a thermal power generation temperature control group device as claimed in any one of claims 1 to 5, an electrolyte tank and a battery stack, wherein the liquid outlet of the battery stack is connected to the liquid inlet of the thermal power generation temperature control device, the liquid outlet of the thermal power generation temperature control device is connected to the liquid inlet of the electrolyte tank, and the liquid outlet of the electrolyte tank is connected to the liquid inlet of the battery stack; characterized in that: The battery stack is electrically connected to a unidirectional DC / DC converter, the unidirectional DC / DC converter is electrically connected to a bidirectional DC / DC converter, and the bidirectional DC / DC converter is electrically connected to a thermal power generation temperature control device; It also includes a temperature detection module, and the controlled end of the bidirectional DC / DC converter is connected to the control end of the temperature detection module.

7. The aluminum-air battery power generation temperature control system according to claim 6, characterized in that: The temperature detection module includes a temperature detection controller and a temperature sensor, the temperature detection controller and the temperature sensor are electrically connected, the control end of the temperature detection controller is connected to the controlled end of the bidirectional DC / DC converter, and the temperature sensor includes at least a battery stack electrolyte outlet temperature sensor, and the battery stack electrolyte outlet temperature sensor is arranged at the liquid outlet of the battery stack.

8. The aluminum-air battery power generation temperature control system as claimed in claim 7, characterized in that: The temperature sensor also includes an electrolyte tank outlet temperature sensor and a heat exchange plate temperature sensor. The electrolyte tank outlet temperature sensor is arranged at the liquid outlet of the electrolyte tank, and the heat exchange plate temperature sensor is arranged on the heat exchange plate.

9. The aluminum-air battery power generation temperature control system according to claim 6, characterized in that: It also includes an energy storage battery, which is connected to the unidirectional DC / DC converter and the bidirectional DC / DC converter.

10. The aluminum-air battery power generation temperature control system according to claim 9, characterized in that: A circulation pump is also provided between the electrolyte tank and the battery stack, and the energy storage battery is electrically connected to the circulation pump.

Images