Metal fuel cell system and heat dissipation method thereof

文档序号：155427 发布日期：2021-10-26 浏览：48次中文

阅读说明：本技术 金属燃料电池系统及其散热方法 (Metal fuel cell system and heat dissipation method thereof ) 是由王益成于 2020-04-23 设计创作，主要内容包括：一种金属燃料电池系统,包括金属燃料电池电堆和抽取式散热装置,散热装置腔体包括设置在腔体内、外的导热部件和散热部件；导热部件和散热部件连接在一起；导热部件上有液流通道；金属燃料电池电堆的电堆出液口与散热装置进液口相连通；散热装置出液口与循环泵进液口相连通,循环泵出液口与电堆进液口相连通；在循环泵的作用下,电堆内的电解液由散热装置进液口流入其腔体内,流经导热部件,电解液的热量经导热部件传导到腔体外部的散热部件散发出去；降温的电解液经散热装置的出液口流出,被循环泵泵入电堆,如此循环。本系统能有效阻止放电时电解液的温度上升。(A metal fuel cell system comprises a metal fuel cell stack and a removable heat dissipation device, wherein a cavity of the heat dissipation device comprises a heat conduction part and a heat dissipation part which are arranged inside and outside the cavity; the heat-conducting member and the heat-radiating member are connected together; the heat conducting component is provided with a liquid flow channel; the liquid outlet of the metal fuel cell stack is communicated with the liquid inlet of the heat radiating device; the liquid outlet of the heat dissipation device is communicated with the liquid inlet of the circulating pump, and the liquid outlet of the circulating pump is communicated with the liquid inlet of the electric pile; under the action of the circulating pump, electrolyte in the galvanic pile flows into the cavity of the heat dissipation device from the liquid inlet of the heat dissipation device and flows through the heat conduction component, and the heat of the electrolyte is conducted to the heat dissipation component outside the cavity through the heat conduction component and is dissipated; the cooled electrolyte flows out from the liquid outlet of the heat dissipation device and is pumped into the electric pile by the circulating pump, and the circulation is carried out. The system can effectively prevent the temperature of the electrolyte from rising during discharging.)

1. A metal fuel cell system comprises a metal fuel cell stack and a removable heat sink; the method is characterized in that:

the liquid outlet of the metal fuel cell stack is communicated with the liquid inlet of the heat dissipation device; the liquid outlet of the heat dissipation device is communicated with the liquid inlet of a circulating pump, and the liquid outlet of the circulating pump is communicated with the liquid inlet of the metal fuel cell stack;

the removable heat dissipation device comprises a heat dissipation device liquid outlet, a heat dissipation device liquid inlet, a cavity, a heat conduction component arranged in the cavity and a heat dissipation component arranged outside the cavity; the heat-conducting member and the heat-radiating member are connected together; the heat conducting component is provided with a liquid flow channel;

under the action of the circulating pump, electrolyte in the metal fuel cell stack flows into the cavity of the heat dissipation device from the liquid inlet of the heat dissipation device and flows through the heat conduction component, and the heat of the electrolyte is conducted to the heat dissipation component outside the cavity through the heat conduction component to be dissipated; the cooled electrolyte flows out from the liquid outlet of the heat dissipation device and is pumped into the metal fuel cell stack by the circulating pump, and the process is circulated.

2. The metal fuel cell system according to claim 1, wherein:

the cavity of the extraction type heat dissipation device is a fully closed cavity or an open cavity; the open type cavity is provided with an upper cover which covers the cavity and forms a closed inner cavity together with the cavity; a heat sink liquid inlet and a heat sink liquid outlet are respectively arranged on two opposite side surfaces of the cavity, or a heat sink liquid inlet groove and a heat sink liquid outlet groove are respectively arranged on two opposite side surfaces of the cavity, a heat sink liquid inlet is arranged on the heat sink liquid inlet groove, and a heat sink liquid outlet is arranged on the heat sink liquid outlet groove; a solution replenishing port is arranged on the upper side surface of the totally-enclosed cavity; a solution replenishing port is arranged on the upper cover of the open type cavity; and the solution replenishing port is used for replenishing the electrolyte.

3. The metal fuel cell system according to claim 1, wherein:

the heat conducting component comprises heat conducting pieces arranged in the cavity; gaps or through grooves or through holes which are enough for electrolyte to flow through are left between the heat conducting members or/and the heat conducting members to be used as flow channels.

4. The metal fuel cell system according to claim 1, wherein:

the heat conducting component is made of materials with heat conductivity and corrosion resistance, and comprises metal titanium, stainless steel or ceramics.

5. The metal fuel cell system according to claim 2, wherein:

the heat conducting piece comprises a heat conducting net, a heat conducting sheet and a heat conducting pipe; the heat-conducting member may be straight or curved.

6. The metal fuel cell system according to claim 1, wherein:

the heat dissipation part comprises heat dissipation parts arranged outside the cavity, and the heat dissipation parts are directly connected with the heat conduction parts in the cavity through the wall of the cavity or the upper cover; a channel or a through groove or a through hole which is enough for air to circulate is reserved between the heat dissipation pieces or/and the heat dissipation pieces; the radiating piece comprises a radiating net, radiating fins and radiating pipes, and can be straight or bent; the heat dissipation part is arranged by one or two or all of a heat dissipation net, a heat dissipation fin and a heat dissipation pipe.

7. The metal fuel cell system according to claim 1, wherein:

the heat dissipation part is connected to any one side or multiple sides or periphery of the outer wall of the cavity or connected to the upper cover.

8. The metal fuel cell system according to claim 1, wherein:

the radiating part is covered with a radiating outer cover, at least one airflow channel is formed between the radiating outer cover and the radiating part, and an exhaust fan is arranged on the at least one airflow channel.

9. A heat dissipation method of a metal fuel cell system, the metal fuel cell system comprises a metal fuel cell stack and a removable heat dissipation device, and is characterized in that:

a heat conducting part is arranged in the cavity of the heat radiating device and is connected with the heat radiating part outside the cavity; the heat conducting component is provided with a liquid flow channel; flow channels are left between the heat-conducting members or/and the heat-conducting members sufficient to allow the flow of electrolyte therethrough.

The liquid outlet of the metal fuel cell stack is connected with the liquid inlet of the heat dissipation device; the liquid outlet of the heat dissipation device is connected with the liquid inlet of the circulating pump, and the liquid outlet of the circulating pump is connected with the liquid inlet of the metal fuel cell stack;

under the action of the circulating pump, electrolyte in the metal fuel cell stack flows into the cavity of the heat dissipation device from the liquid inlet of the heat dissipation device and passes through the liquid flow channel of the heat conduction component, and the heat of the electrolyte is conducted to the heat dissipation component outside the cavity by the heat conduction component to be dissipated; the cooled electrolyte flows out from the liquid outlet of the heat dissipation device and is pumped into the metal fuel cell stack by the circulating pump, and the process is circulated.

10. The heat dissipation method of a metal fuel cell system as defined in claim 9, wherein:

11. The heat dissipation method of a metal fuel cell system as defined in claim 9, wherein:

the heat conducting component comprises heat conducting pieces arranged in the cavity; gaps or through grooves or through holes which are enough for electrolyte to pass through are left between the heat conducting members or/and the heat conducting members to be used as flow channels. The heat conducting component is connected with the heat radiating component outside the cavity directly or through the cavity wall or through the upper cover.

12. The heat dissipation method of a metal fuel cell system as defined in claim 11, wherein:

the heat conducting member comprises a heat conducting net, a heat conducting sheet and a heat conducting pipe, and the heat conducting member can be straight or bent; the heat conducting component is arranged by one or two or all of a heat conducting net, a heat conducting fin and a heat conducting pipe.

Technical Field

The present invention relates to fuel cells, and more particularly, to a metal fuel cell system and a heat dissipation method thereof.

Background

The metal fuel cell (also called metal-air cell) has the characteristics of high specific energy, high specific power, safety and environmental protection, is a green high-energy metal fuel cell, and has important application in the fields of mobile power stations, communication base stations, electric vehicles and the like. There are many types of metal fuel cells, including aluminum fuel cells (also called aluminum-air cells), magnesium fuel cells (also called magnesium-air cells), zinc fuel cells (also called zinc-air cells), lithium fuel cells (also called lithium-air cells), iron fuel cells (also called iron-air cells), and the like. The metal fuel cell is composed of a metal cathode, an air electrode anode, electrolyte, a cell cavity and related accessory components. A large amount of heat is generated during the discharge process of the high-power metal fuel cell, which causes the temperature of the electrolyte to rise rapidly. When the temperature of the electrolyte exceeds 60 ℃, the discharge process of the battery becomes unstable, and even the discharge of the metal fuel battery is stopped, which causes danger. To prevent the temperature of the electrolyte from rising during the discharging process, the metal fuel cell is usually provided with a large liquid storage tank and a corresponding liquid circulation system (see "aluminum air battery system", CN110299581 for details), so as to remove the heat in the battery cavity in time by increasing the volume of the electrolyte and the circulation of the electrolyte. However, for high-power metal fuel cells, such a method still cannot prevent the rapid temperature rise of the electrolyte during the discharging process, thereby greatly limiting the duration of the continuous discharging of the metal fuel cell. And the large liquid storage tank greatly increases the volume of the metal fuel cell and obviously reduces the specific energy of the cell.

Disclosure of Invention

In order to solve the defects of overlarge volume, non-ideal heat dissipation effect, limited duration of continuous discharge and the like of the metal fuel cell in the prior art, the invention provides a metal fuel cell system provided with an extraction type heat dissipation device. The system can rapidly take out and dissipate heat in the electrolyte in the discharging process, effectively prevent the temperature of the electrolyte from rising when a high-power metal fuel cell stack discharges, and provide guarantee for the high-power and long-time safe and continuous operation of the metal fuel cell.

The invention provides a metal fuel cell system, which comprises a metal fuel cell stack and a removable heat dissipation device; the removable heat dissipation device comprises a heat dissipation device liquid outlet, a heat dissipation device liquid inlet, a cavity, a heat conduction component arranged in the cavity and a heat dissipation component arranged outside the cavity; the heat-conducting member and the heat-radiating member are connected together; the heat conducting component is provided with a liquid flow channel; the liquid outlet of the metal fuel cell stack is communicated with the liquid inlet of the heat dissipation device; the liquid outlet of the heat dissipation device is communicated with the liquid inlet of a circulating pump, and the liquid outlet of the circulating pump is communicated with the liquid inlet of the metal fuel galvanic pile; under the action of the circulating pump, electrolyte in the metal fuel cell stack flows into the cavity of the metal fuel cell stack from the liquid inlet of the heat dissipation device and flows through the heat conduction component, and the heat of the electrolyte is conducted to the heat dissipation component outside the cavity through the heat conduction component to be dissipated; the cooled electrolyte flows out from the liquid outlet of the heat dissipation device and is pumped into the metal fuel cell stack by the circulating pump, and the process is circulated.

Further, the method comprises the following steps:

The heat conducting component is made of materials with heat conductivity and corrosion resistance, and comprises metal titanium, stainless steel or ceramics.

The heat-conducting member includes a heat-conducting mesh, a heat-conducting fin, and a heat-conducting pipe, and the heat-conducting member may be flat or curved.

The heat dissipation part comprises heat dissipation parts arranged outside the cavity, and the heat dissipation parts are directly connected with the heat conduction parts in the cavity through the wall of the cavity or the upper cover; and channels or slotted holes which are enough for air to flow are reserved between the heat dissipation pieces or/and the heat dissipation pieces.

The radiating member comprises a radiating net, radiating fins and radiating pipes, and the radiating member can be straight or bent.

The heat dissipation part is connected to any one side or multiple sides or periphery of the outer wall of the cavity or connected to the upper cover.

The radiating part is covered with a radiating outer cover, at least one airflow channel is formed between the radiating outer cover and the radiating part, and an exhaust fan is arranged on the at least one airflow channel.

In order to solve the problems of the prior art, the invention also provides a heat dissipation method of the metal fuel cell system, wherein the metal fuel cell system comprises a metal fuel cell stack and a removable heat dissipation device, a heat conduction component is arranged in a cavity of the removable heat dissipation device, and the heat conduction component is connected with the heat dissipation component outside the cavity; the heat conducting component is provided with a liquid flow channel; the liquid outlet of the metal fuel cell stack is connected with the liquid inlet of the heat dissipation device; the liquid outlet of the heat dissipation device is connected with the liquid inlet of the circulating pump, and the liquid outlet of the circulating pump is connected with the liquid inlet of the metal fuel cell stack; under the action of the circulating pump, electrolyte in the metal fuel cell stack flows into the cavity of the heat dissipation device from the liquid inlet of the heat dissipation device and passes through the liquid flow channel of the heat conduction component, and the heat of the electrolyte is conducted to the heat dissipation component outside the cavity by the heat conduction component to be dissipated; the cooled electrolyte flows out from the liquid outlet of the heat dissipation device and is pumped into the metal fuel cell stack by the circulating pump, and the process is circulated.

Further, the method comprises the following steps:

The heat conducting component comprises heat conducting pieces arranged in the cavity; gaps or slots are left between the heat-conducting members or/and the heat-conducting members and are used as liquid flow channels for electrolyte to flow through. The heat conducting component is connected with the heat radiating component outside the cavity body directly or through the cavity body wall or the upper cover.

The heat conducting member comprises a heat conducting net, a heat conducting sheet and a heat conducting pipe, and the heat conducting member can be straight or bent; the heat conducting component is arranged by one or two or all of a heat conducting net, a heat conducting fin and a heat conducting pipe.

The heat dissipation part comprises a heat dissipation part arranged outside the cavity or outside the upper cover; the radiating member includes a radiating net, radiating fins and radiating pipes, and may be straight or curved. The heat dissipation part is arranged by one or two or all of a heat dissipation net, a heat dissipation fin and a heat dissipation pipe.

The metal fuel cell system and the heat dissipation method thereof can quickly take out the heat in the metal fuel cell electrolyte and dissipate the heat to the surrounding space, effectively prevent the temperature of the electrolyte from rising during discharging, and provide guarantee for high-power and long-time safe and continuous operation of the metal fuel cell system. The liquid flow heat dissipation system composed of the liquid flow circulation system and the extraction type heat dissipation device is not only suitable for heat dissipation of a metal fuel cell system, but also suitable for chemical equipment, mechanical equipment, environmental protection equipment, medical equipment, communication equipment, telecommunication equipment, a computer system and the like which need to dissipate heat of liquid, can effectively control the temperature rise of the equipment or the system in the operation process, and ensures that the temperature of the equipment or the system in the operation process is maintained in a preset temperature range.

Drawings

FIG. 1 is a schematic structural diagram of a heat dissipation system of a metal fuel cell according to the present invention;

fig. 2 is a schematic structural diagram of a three-dimensional a), a left side view b), a top view c) and an a-a section d) of the removable heat dissipation device 2 with an open cavity structure, wherein the heat sink and the heat conductive fin are of an integrated structure, and the heat conductive fin and the heat sink of the integrated structure are embedded in the upper cover.

Fig. 3 is a schematic perspective view of the removable heat sink with the open cavity structure of fig. 2 after the cavity is removed.

Fig. 4 is a schematic structural view of a front view a) and a left side view b) of the structure of fig. 3, and the heat conducting fin and the heat radiating fin of the integrated structure are embedded in the upper cover.

FIG. 5 is a schematic structural view of the upper lid of FIG. 4 with the upper lid sealing layer disposed thereon, taken from a) and B-B

Fig. 6 is a schematic structural view of a) and b) of the heat sink of fig. 4, wherein the heat sink and the heat-conducting fin are of a split structure and made of different materials.

Fig. 7 is a schematic structural view of a front view a) and a left side view b) of the structure in which the heat-conducting fin and the heat-radiating fin of the porous structure of the integrated structure are provided with the holes of the heat-radiating fin of fig. 4, wherein the heat-conducting fin and the heat-radiating fin of the porous structure of the integrated structure are coupled to the upper cover.

Fig. 8 is a schematic structural view of a front view a) and a left side view b) of the heat sink and the heat conducting fin of fig. 4 in a split structure. Wherein, the heat-conducting plate is provided with holes, and the number of the heat-radiating plates is different from that of the heat-conducting plates, and the heat-radiating plates and the heat-conducting plates are respectively connected on the upper cover.

Fig. 9 is a schematic sectional view of a front view a) and a left side view b) and a C-C sectional view of the heat sink and the heat conductive sheet of fig. 4 in a split structure, in which the heat conductive sheet and the heat sink are respectively connected to the upper cover, and a heat conductive pipe is further disposed between the heat conductive sheets.

Fig. 10 is a schematic view of the structure of fig. 4, in front view a), left side view b), and D-D section c) of the heat conductive mesh, wherein the heat conductive mesh and the heat sink are attached to the upper cover, respectively.

Fig. 11 is a schematic structural view of the integrated structure of the heat sink and the heat conductive sheet of fig. 4, in front view a), left side view b), and top view c). Wherein, integral type conducting strip and fin are connected on the upper cover, still are provided with the radiator-grid between the fin.

Fig. 12 is a schematic structural view of the integrated heat sink and heat conductive fin of fig. 4 in a front view a) and a left side view b) in a folded shape, and the integrated heat sink and heat conductive fin of the folded structure are embedded in the upper cover.

Fig. 13 is a schematic structural view of a three-dimensional structure a), a section b) of E-E and a left side view c) of the heat sink of fig. 4 with the heat sink housing and the exhaust fan.

Fig. 14 is a schematic structural diagram of an open cavity structure of an extraction type heat dissipation device in a three-dimensional structure a), a left side view b), a top view c) with an upper cover removed and a section d) from F to F. Wherein, the curved surface structure heat conduction fin and the straight structure cooling fin which adopt the integral structure are connected on the side wall of the cavity.

Fig. 15 is a schematic structural diagram of a three-dimensional a), a left side view b), a top view c) with an upper cover removed and a G-G section d) of the extraction type heat dissipation device with an open cavity structure, wherein a heat conduction sheet and a heat dissipation sheet with an integrated structure are connected to the side wall of the cavity, and a groove is formed on the heat conduction sheet.

Fig. 16 is an arrangement of the integral heat-conducting fins attached to the walls of the chamber of fig. 15, the heat-conducting fins having the grooves formed in the upper portion thereof and the heat-conducting fins formed in the lower portion thereof being arranged at intervals.

Fig. 17 is a schematic perspective view of a removable heat sink with a fully enclosed cavity structure.

Fig. 18 is a schematic structural view of a top view a), H-H section b), J-J section c), and I-I section d) of the extraction heat sink of fig. 17.

Fig. 19 is a perspective view of the extraction heat sink of fig. 17 with a heat sink cover and a fan.

Description of the reference numerals

1. Metal fuel cell stack

1-1, liquid inlet of galvanic pile

1-2, liquid outlet of electric pile

2. Extraction type heat dissipation device

2-1, liquid inlet of heat dissipation device

2-1-1, liquid inlet tank of heat dissipation device

2-2, liquid outlet of heat dissipation device

2-2-1 liquid outlet groove of heat dissipation device

2-3, cavity

2-3-1 open type cavity

2-3-2, closed cavity

2-3-3, cavity solution replenishing port

2-4, upper cover

2-4-1, top sealing layer

2-4-2, upper cover solution replenishing port

2-5, heat-conducting member

2-5-1, a heat-conducting fin connected with the upper cover

2-5-1-1, and an integral planar structure heat-conducting fin connected with the upper cover

2-5-1-2, split type plane structure heat-conducting fin connected with upper cover

2-5-1-3 integrated plane structure heat conducting fin embedded into upper cover

2-5-1-4 integral bent structure heat conducting fin embedded into upper cover

2-5-3, and integrated curved-surface-structure heat-conducting fin connected with cavity wall

2-5-4, and an integrated plane structure heat-conducting fin connected with the cavity wall

2-5-5, heat conducting pipe

2-5-6 of heat conducting net

2-6, Heat radiating Member

2-6-1, a heat sink connected with the upper cover

2-6-1-1, and integrated plane structure radiating fin connected with upper cover

2-6-1-2, split type plane structure radiating fin connected with upper cover

2-6-1-3 integrated plane structure radiating fin embedded into upper cover

2-6-1-4 integrated bent structure radiating fin embedded into upper cover

2-6-2, heat sink connected to the cavity wall

2-6-3, heat radiation net

2-7, cover for heat-radiating member

2-8 through hole in heat sink or heat conducting member

2-9, through groove on heat conducting member or heat radiating member

3. Circulating pump

3-1, liquid inlet of circulating pump

3-2, liquid outlet of circulating pump

3-4 liquid flow pipe

5. Exhaust fan

6. An air flow channel.

Detailed Description

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Example 1 a preferred metal fuel cell, as shown in figure 1, comprises a stack 1 of metal fuel cells, a removable heat sink 2 and a circulation pump 3.

The liquid outlet 1-2 of the metal fuel cell stack is connected with the liquid inlet 2-1 of the heat dissipation device of the extraction type heat dissipation device 2 through the liquid flow pipe 3-4. The liquid outlet 2-2 of the heat dissipation device of the extraction type heat dissipation device is connected with the liquid inlet 3-1 of the circulating pump 3 through the liquid flow pipe 3-4. A circulating pump liquid outlet 3-2 of the circulating pump 3-3 is connected with a galvanic pile liquid inlet 1-1 of the metal fuel cell galvanic pile through a liquid flow pipe 3-4.

Under the action of the circulating pump 3-3, the electrolyte in the extraction type heat dissipation device 2 flows into the liquid flow pipe 3-4 from the liquid outlet 2-2 of the heat dissipation device and enters the circulating pump 3 through the liquid inlet 3-1 of the circulating pump. Then, the electrolyte flows out from a circulating pump liquid outlet 3-2 of the circulating pump 3, enters the metal fuel cell stack 1 from a stack liquid inlet 1-1 of the metal fuel cell stack 1 through a liquid flow pipe 3-4, and then enters a single metal fuel cell cavity in the metal fuel cell stack 1. The electrolyte entering the cavity of the single battery flows through the battery cavity, finally flows out of a battery liquid outlet 1-2 of the metal fuel battery 1, enters a liquid flow pipe 3-4, and enters the extraction type heat dissipation device 2 from a liquid inlet 2-1 of the extraction type heat dissipation device. The electrolyte entering the extraction type heat dissipation device 2 flows through the extraction type heat dissipation device, flows into the liquid flow pipe 3-4 from the liquid outlet 2-2 of the heat dissipation device of the extraction type heat dissipation device 2 again, enters the circulating pumps 3-3 and … …, and circulates in the way.

Embodiment 2 the removable heat sink of the metal-burning battery system in embodiment 1 may be a removable heat sink with an open cavity structure as shown in fig. 2, and includes a heat sink cavity 2-3-1, an upper cover 2-4, a heat sink liquid inlet tank 2-1-1, a heat sink liquid outlet tank 2-2-1, a heat conducting member 2-5, and a heat dissipating member 2-6. The upper cover 2-4 is buckled at the upper part of the open cavity 2-3-1, and the lower edge of the upper cover 2-4 is tightly jointed with the upper edge of the open cavity 2-3-1. An upper cover solution replenishing port is arranged on the upper covers 2-4 and is used for replenishing electrolyte. The liquid inlet groove 2-1-1 of the heat dissipation device is positioned on the upper side wall of the open type cavity 2-3-1, one end of the liquid inlet groove is connected with the liquid inlet 2-1 of the heat dissipation device, the liquid outlet groove 2-2-1 is positioned on the lower part of the side wall of the open type cavity 2-3-1 opposite to the side wall provided with the liquid inlet groove 2-1-1 of the heat dissipation device, and one end of the liquid outlet groove is connected with the liquid outlet 2-2 of the heat dissipation device.

As shown in fig. 3 and 4, the heat-conducting member 2-5 and the heat-radiating member 2-6 are an upper cover heat-radiating fin 2-6-1-3 and an upper cover heat-conducting fin 2-5-1-3, which are respectively arranged on the upper and lower sides of the upper cover; a gap which is enough for air or electrolyte to flow is reserved between the radiating fin and the heat conducting fin; the upper cover radiating fins 2-6-1-3 and the upper cover heat conducting fins 2-5-1-3 are of an integrated structure and are embedded in the upper cover 2-4. The upper cover radiating fins 2-6-1-3 are distributed on the upper cover 2-4 and are positioned outside the open cavity 2-3-1. The upper cover heat conducting fins 2-5-1-3 are positioned below the upper cover 2-4 and are arranged in the open cavity 2-3-1. The upper cover radiating fins 2-6-1-3 and the upper cover heat conducting fins 2-5-1-3 are made of metal titanium with the same material. The open cavity 2-3-1 and the upper cover 2-4 are both made of metal titanium.

Under the action of the circulating pump 3, the electrolyte in the metal fuel cell stack 1 enters the open cavity 2-3-1 of the extraction type heat dissipation device 2 through the liquid inlet 2-1 of the heat dissipation device and along the liquid inlet groove 2-1-1 of the heat dissipation device, then flows through the upper cover heat conduction sheet 2-5-1-3 of the heat conduction component 2-5, then flows into the liquid outlet groove 2-2-1 of the heat dissipation device, flows out of the extraction type heat dissipation device 2 through the liquid outlet 2-2, and enters the metal fuel cell stack 1 again. When the electrolyte flows through the upper cover heat conducting fins 2-5-1-3, the heat in the electrolyte is transferred to the upper cover heat conducting fins 2-5-1-3. The heat absorbed by the upper cover heat-conducting fins 2-5-1-3 is transferred to the upper cover heat-radiating fins 2-6-1-3 connected with the upper cover heat-conducting fins, and finally the heat is radiated to the outside air from the upper cover heat-radiating fins 2-6-1-3. Therefore, the extraction type heat dissipation device 2 extracts heat in the electrolyte flowing through the cavity heat conducting fins 2-5-1-3, so that the heat dissipation of the electrolyte is realized, and the temperature rise of the electrolyte in the discharging process of the metal fuel cell is effectively prevented.

The extraction type heat sink 1 shown in fig. 2 may not be provided with the heat sink liquid inlet groove 2-1-1, but only with the heat sink liquid inlet 2-1, and the liquid inlet may be arranged on the upper portion of the sidewall of the cavity 2-3 or on the upper cover 2-4. The extraction type heat dissipation device shown in fig. 2 may not be provided with the heat dissipation device liquid outlet groove 2-2-1, but only provided with the heat dissipation device liquid outlet 2-2, and the liquid outlet 2-2 may be arranged at the lower part or the bottom of the side wall of the cavity 2-3.

As shown in FIG. 5, an upper cover sealing layer 2-4-1 can be further arranged at the joint of the lower edge of the upper cover 2-4 in FIG. 4 and the upper edge of the open cavity 2-3-1. The heat conducting fins 2-5-1-3 in fig. 4 can be further provided with through grooves 2-9 on the heat conducting fins, so that the electrolyte entering the cavity of the extraction type heat dissipation device 2 can better flow through each heat conducting fin 2-5-1-3 and better transfer heat to each heat conducting fin 2-5-1-3, and then flows out of the extraction type heat dissipation device 2. The heat radiating fins 2-6-1-3 and the heat conducting fins 2-5-1-3 are made of the same stainless steel material. The upper cover 2-4 and the open type cavity 2-3-1 are made of corrosion-resistant ceramic materials.

On the basis, the removable heat dissipation device can also have various structural forms:

as shown in fig. 6, through-grooves 2-9 are provided in the heat sink in a planar structure like the heat sink shown in fig. 4, so that the heat of the heat sink 2-6-1-3 can be more rapidly dissipated into the ambient air. In fig. 6, the heat sink 2-6-1-3 and the heat conducting fin 2-5-1-3 are of a split structure, i.e., the lower end of the heat sink 2-6-1-3 is connected to the upper cover 2-4, the upper end of the heat conducting fin 2-5-1-3 is connected to the upper cover 2-4, and the heat conducting member and the heat radiating member are connected together through the upper cover. The radiating fins 2-6-1-3 and the heat conducting fins 2-5-1-3 are made of different materials. The heat radiating fins 2-6-1-3 are made of aluminum alloy, and the heat conducting fins 2-5-1-3 are made of stainless steel. The upper cover and the cavity are both made of corrosion-resistant high polymer materials.

As shown in fig. 7, through-holes 2-8 of the heat sink are provided on the heat sink like fig. 4, and the heat sink 2-6-1-1 and the heat conductive fins 2-5-1-1 are of an integral structure. The heat conducting fin 2-5-1-1 having an integral structure and the heat radiating fin 2-6-1-1 having a porous structure are coupled to the upper cover 2-4. The heat conducting component, the heat radiating component, the upper cover and the cavity are all made of corrosion-resistant ceramic materials.

As shown in FIG. 8, through holes 2-8 on the heat conducting plate can be further arranged on the heat conducting plate similar to FIG. 4, the heat radiating fins 2-6-1-2 and the heat conducting plates 2-5-1-2 are of split type structures, and the number of the heat radiating fins 2-6-1-2 is different from that of the heat conducting plates 2-5-1-2. The heat conducting component, the heat radiating component, the upper cover and the cavity are all made of corrosion-resistant stainless steel. The heat conducting fin 2-5-1-2 and the radiating fin 2-6-1-2 which are made of stainless steel materials are respectively welded on the two sides of the upper cover made of stainless steel materials to be connected into a whole.

As shown in fig. 9, heat conductive pipes 2-5-5 are provided between the heat conductive sheets like the heat conductive member of fig. 4. The radiating fins 2-6-1-2 and the heat conducting fins 2-5-1-2 are of split structures, and the quantity of the radiating fins 2-6-1-2 is different from that of the heat conducting fins 2-5-1-2. The heat conduction pipes are formed by weaving stainless steel pipes and connected between the adjacent radiating fins 2-5-1-2, and meshes of the heat conduction pipes are enough for the electrolyte to flow through. The heat conducting pipes 2-5-5, the heat conducting fins 2-5-1-2, the radiating fins 2-6-1-2, the upper cover 2-4 and the cavity 2-3 are all made of corrosion-resistant stainless steel. The heat conducting fin 2-5-1-2 and the radiating fin 2-6-1-2 made of stainless steel are respectively welded on the upper side and the lower side of the upper cover made of stainless steel.

As shown in fig. 10, the heat conductive member is a heat conductive mesh 2-5-6 arranged at the bottom of the upper cover like in fig. 4, wherein the heat conductive mesh 2-5-6 and the heat radiating fins 2-6-1-2 are connected together via the upper cover 2-4. The heat conducting net 2-5-6 is formed by piling solid structure metal titanium wires and is connected on the upper cover. The stainless steel upper cover radiating fins 2-6-1-2 are welded on the stainless steel upper cover 2-4. The cavity 2-3 of the heat sink is made of ceramic material.

As shown in fig. 11, heat-dissipating webs 2-6-3 are provided between the heat-dissipating fins of the structure similar to fig. 4. The radiating fin 2-6-1-1 and the heat conducting fin 2-5-1-1 are of an integrated structure. The radiating fins and the heat conducting fins of the integrated structure are connected on the upper cover 2-4, a radiating net 2-6-3 is further arranged between the radiating fins 2-6-1-1, the radiating net 2-6-3 is connected with the adjacent radiating fins 2-6-1-1, and the meshes of the radiating net are enough for air circulation. The radiating fins 2-6-1-1, the heat conducting fins 2-5-1-1 and the upper cover 2-4 are made of stainless steel materials, and the radiating nets 2-6-3 are solid stainless steel wires.

As shown in fig. 12, the heat conducting fin and the heat dissipating fin of the integrated structure similar to fig. 4 adopt a bent structure. The bent structure radiating fins 2-5-1-4 and the bent structure heat conducting fins 2-6-1-4 are of an integrated structure and are embedded into the upper cover 2-4.

As shown in fig. 13, the heat dissipation member of fig. 4 is provided with heat dissipation member covers 2 to 7 to form an air flow channel 6, and one end of the air flow channel 6 is provided with a discharge fan 5; under the action of the exhaust fan 5, a large amount of external air enters from one end of the airflow channel 6, rapidly flows through the airflow channel 6 and flows out from the other end of the airflow channel 6. When air rapidly flows through the airflow channel 6, the heat of the heat dissipation part is taken away, and the effect of rapid heat dissipation is achieved.

Embodiment 3 the removable heat sink of the metal fuel cell system in embodiment 1 may also be a removable heat sink with an open cavity structure as shown in fig. 14, and includes an open cavity 2-3-1, an upper cover 2-4, a liquid inlet tank 2-1-1, a liquid outlet tank 2-2-1, a heat conducting member 2-5, and a heat dissipating member 2-6. The upper cover 2-4 is buckled at the upper part of the open cavity 2-3-1, and the lower edge of the upper cover 2-3 is tightly jointed with the upper edge of the open cavity 2-3-1. The liquid inlet groove 2-1-1 of the heat dissipation device is positioned on the upper side wall of the open type cavity 2-3-1, one end of the liquid inlet groove is communicated with the liquid inlet 2-1 of the heat dissipation device, the liquid outlet groove 2-2-1 is positioned on the lower part of the side wall of the open type cavity 2-3-1 opposite to the liquid inlet groove 2-1-1 of the heat dissipation device, and one end of the liquid outlet groove is communicated with the liquid outlet 2-2 of the heat dissipation device. An upper cover solution replenishing port 2-4-2 is arranged on the upper cover 2-4 and is used for replenishing electrolyte.

The heat conducting fin 2-5-3 with the curved surface structure of the heat conducting component 2-5 and the heat radiating fins 2-6-2 forming the heat radiating component 2-6 are of an integral structure, namely the heat conducting fin 2-5-3 with the curved surface structure penetrates through the open cavity 2-3-1, and the heat radiating fins 2-6-2 positioned at the two ends of the heat conducting fin respectively penetrate through the side wall of the cavity and extend to the outside of the cavity 2-3 to form two heat radiating components.

The liquid inlet tank 2-1-1, the liquid outlet tank 2-2-1, the open cavity 2-3-1, the upper cover 2-4, the heat conducting fins 2-5-3 and the heat radiating fins 2-6-2 which penetrate through the open cavity 2-3-1 and are of an integrated structure are all made of stainless steel.

Under the action of the circulating pump 3, the electrolyte in the metal fuel cell stack 1 flows into the open cavity 2-3-1 of the heat dissipation device through the liquid inlet 2-1 and the liquid inlet groove 2-1-1 of the heat dissipation device, flows through the heat conducting fins 2-5-3 with the curved surface structures, finally converges into the liquid outlet groove 2-2-1 of the heat dissipation device, flows out of the removable heat dissipation device through the liquid outlet 2-2 of the heat dissipation device, and reenters into the metal fuel cell stack 1. When the electrolyte flows through the curved-surface-structure heat conducting fins 2-5-3, the heat in the electrolyte is transferred to the curved-surface-structure heat radiating fins 2-5-3, the heat absorbed by the curved-surface-structure heat radiating fins 2-5-3 is transferred to the heat radiating fins 2-6-2 positioned on the two sides of the curved-surface-structure heat radiating fins, and finally the heat is radiated to the outside ambient air. Therefore, the heat in the electrolyte flowing through the curved-surface-structure heat dissipation part is extracted by the extraction type heat dissipation device, so that the heat dissipation of the electrolyte is realized, and the temperature rise of the electrolyte in the discharging process of the metal fuel cell is effectively prevented.

As shown in fig. 15, another heat sink and heat conducting fin of an integrated structure is different from that of fig. 14 in that the heat conducting fin located in the cavity is a heat conducting fin 2-5-4 of a planar structure. Through grooves 2-9 on the heat-conducting member for liquid to flow through are arranged on the heat-conducting fins 2-5-4. As shown in fig. 16, the through grooves 2-9 of the adjacent heat conducting fins are different in position, that is, the through groove 2-9 of one heat conducting fin is arranged at the upper part of the heat sink, and the through groove 2-9 of the adjacent heat sink is arranged at the lower part of the heat conducting fin. The through grooves of the heat conducting fins are arranged in such a way, so that the electrolyte flowing into the extraction type heat dissipation device can flow out of the extraction type heat dissipation device after flowing through each heat conducting fin to the maximum extent.

Example 4 the removable heat sink of the metal combustion battery system of example 1, which is preferably a closed cavity structure shown in fig. 17 and 18, includes a closed cavity 2-3-2, a heat conductive member 2-5, and a heat dissipation member 2-6. The heat conducting component is a heat conducting pipe 2-5-5 arranged in the closed cavity 2-3-2. The heat conduction pipes 2-5-5 are sequentially arranged in the closed cavity 2-3-2 in a horizontal and vertical mode, and two ends of each heat conduction pipe are connected with the closed cavity 2-3-2; gaps are reserved between the heat conducting pipes, and liquid flows pass through the gaps. The heat dissipation parts 2-6 are arranged around the closed cavity 2-3-2, namely the heat dissipation fins of the heat dissipation parts are arranged on the outer walls of the closed cavity 2-3-2 and are connected with the heat conduction parts of the closed cavity 2-3-2 through the outer walls of the cavity.

The liquid inlet 2-1 of the heat dissipation device is positioned at the top of the closed cavity 2-3-2, and the liquid outlet 2-2 of the heat dissipation device is positioned at the bottom of the closed cavity 2-3-2, so that the electrolyte flows through a longer distance in the cavity as far as possible, and the contact between the electrolyte and the heat conducting component is increased as much as possible. And a cavity solution replenishing port 2-3-3 is also arranged on the upper side surface of the closed cavity 2-3-2 and is used for replenishing electrolyte. The heat dissipation device is characterized in that the closed cavity 2-3-2, the heat dissipation pipe 2-5-5 of the heat dissipation part and the heat dissipation fin 2-6-2 of the heat dissipation part are all made of metal titanium. The heat conducting pipe can adopt a hollow pipe.

Under the action of the circulating pump 3, electrolyte in the metal fuel cell stack 1 enters the closed cavity 2-3-2 through the liquid inlet 2-1 of the heat dissipation device, then flows through the gaps of the heat conduction pipes 2-5-5 in the cavity, finally flows out of the extraction type heat dissipation device from the liquid outlet 2-2 of the heat dissipation device, and enters the metal fuel cell stack 1 again. When the electrolyte flows through the heat conducting pipes 2-5-5 in the cavity, the heat in the electrolyte is transferred to the heat conducting pipes 2-5-5. The heat absorbed by the heat conduction net 2-5-5 is transferred to the heat dissipation parts 2-6 distributed around the cavity, and finally the heat is dissipated to the surrounding air. Therefore, the heat in the electrolyte flowing through the radiating tubes 2-5-5 in the cavity of the extraction type radiating device is extracted, so that the temperature of the electrolyte is reduced, and the temperature rise of the electrolyte in the discharging process of the metal fuel cell is effectively prevented.

As shown in fig. 19, a heat-dissipating member cover 2-7 of a similar structure to that of example 2 was attached to the heat-dissipating member 2-6 of fig. 17, and an air flow passage 6 was formed. Exhaust fans 5 are installed at two ends of an airflow channel 6 formed by the heat dissipation part outer covers 2-7 and the heat dissipation part, the exhaust fan 5 at one end is used for sucking outside air into the airflow channel 6 quickly, and the exhaust fan 5 at the other end is used for exhausting air in the airflow channel 6 quickly, so that heat dissipation of the heat dissipation part is accelerated.

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Metal fuel cell system and heat dissipation method thereof

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