CN114361515B - Cavity blocking type plug-in structure for adjusting flow of cooling liquid - Google Patents

Cavity blocking type plug-in structure for adjusting flow of cooling liquid Download PDF

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Publication number
CN114361515B
CN114361515B CN202111471154.5A CN202111471154A CN114361515B CN 114361515 B CN114361515 B CN 114361515B CN 202111471154 A CN202111471154 A CN 202111471154A CN 114361515 B CN114361515 B CN 114361515B
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cavity
cooling
flow channel
head
cooling cavity
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CN114361515A (en
Inventor
张茜茜
姜天豪
毕飞飞
胡鹏
杜祥永
蓝树槐
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Shanghai Zhizhen New Energy Co Ltd
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Shanghai Zhizhen New Energy Co Ltd
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Priority to CN202111471154.5A priority Critical patent/CN114361515B/en
Publication of CN114361515A publication Critical patent/CN114361515A/en
Priority to PCT/CN2022/089254 priority patent/WO2023097956A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention relates to an orifice blocking type plug-in structure for regulating the flow of cooling liquid. The cavity opening blocking type plug-in component structure for regulating the flow of the cooling liquid consists of a head part capable of penetrating into a cooling cavity flow channel of the polar plate and a tail part capable of being fixed on the polar plate, wherein the head part is used for blocking the cooling cavity flow channel, so that the inflow and the flow speed of the cooling liquid are reduced in a region, blocked by the head part, of the cooling cavity flow channel; the tail is used for being fixed on the polar plate to block the displacement of the head. The plug-in mainly comprises a single plug or a plurality of plugs which can be fixed at the opening of the cooling water cavity, the control of cooling water flow and further balancing the heat dissipation degree of different positions of the electric pile are realized by plugging bipolar plates at different positions to different degrees, the reaction environment of different positions of the electric pile is always in a temperature range which is favorable for the catalyst to play a role, and the operation efficiency of the electric pile is improved.

Description

Cavity blocking type plug-in structure for adjusting flow of cooling liquid
Technical Field
The invention relates to a cavity opening blocking type plug-in structure for adjusting the flow of cooling liquid, in particular to a blocking type plug-in for controlling the flow of the cooling liquid by plugging bipolar plates at different positions to different degrees so as to balance the heat dissipation degrees at different positions of a galvanic pile.
Background
The fuel cell generates a great amount of heat while generating electric energy through electrochemical reaction of hydrogen and oxygen, and the heat dissipation is needed to keep the reaction environment at a temperature capable of keeping the maximum reactivity of the catalyst all the time. Part of the heat can be dissipated through interaction with the external environment, and the other part of the heat needs to be taken away through the action of cooling water.
In the galvanic pile, the interaction between the bipolar plates at different positions and the external environment is inconsistent, the interaction between the bipolar plates at two ends is strong, and the interaction between the bipolar plates at two ends is weak, so that the cooling effect of cooling water is required to be reversed to the interaction, and the flow of the cooling water at two ends is reduced, so that the consistency of the temperature of the reaction environment can be realized by controlling the flow of the cooling water at different positions under the condition of inconsistent environment interaction.
As shown in fig. 1, the cooling cavity flow channels of the existing metal bipolar plate generally have no special structural design, all the flow channels of the cooling liquid are in an all-open state, and the flow rates of the cooling water at different positions of the electric pile are consistent. In order to avoid overheating of the electric pile, the flow rate of cooling water is generally regulated to the maximum in the reaction process, so that the two ends of the electric pile are not heated due to the fact that the current collecting plate and the end plate are in a cooling state, the whole part is in strong interaction with the environment, and the problem that the temperature of the reaction environment is low exists. As shown in fig. 2A, which is a schematic exploded structure of the stack, the stack 90 is composed of two end plates 91, two collector plates 92, and a bipolar plate 93, the bipolar plate 93 is disposed between the two collector plates 92, and the outer sides of the two collector plates 92 are compressed by the two end plates 93. As shown in fig. 2B, a temperature distribution diagram of the stack is shown, in which the bipolar plate in the middle has a higher temperature than the two collector plates and the two collector plates have a higher temperature than the two end plates. This affects the reactivity of the catalysts at both ends of the stack and reduces the efficiency of the stack. If cooling water inlets with different sizes are designed for polar plates at different positions of the galvanic pile through direct die design, at least two sets of dies are required to be designed for the polar plates of the same type, and the cost is extremely high.
Disclosure of Invention
The invention aims to realize control of cooling water flow and balance heat dissipation degrees of different positions of a galvanic pile by plugging bipolar plates at different positions to ensure that reaction environments of different positions of the galvanic pile are always in a temperature range favorable for the catalyst to act, and improve the running efficiency of the galvanic pile. The invention is used for solving the technical problems that the reactivity of catalysts at two ends of a galvanic pile is affected due to uneven temperature distribution at different positions of the galvanic pile caused by the fact that all cooling liquid flow channels of cooling cavity flow channels of the traditional metal bipolar plate are in all open states, and the use efficiency of the galvanic pile is reduced.
The invention provides a cavity opening blocking type plug-in unit structure for regulating the flow of cooling liquid, which realizes the control of the flow of the cooling liquid by plugging bipolar plates at different positions to different degrees. The cavity opening blocking type plug-in component structure for regulating the flow of the cooling liquid consists of a head part capable of penetrating into a cooling cavity flow channel of the polar plate and a tail part capable of being fixed on the polar plate, wherein the head part is used for blocking the cooling cavity flow channel, so that the inflow and the flow speed of the cooling liquid are reduced in a region, blocked by the head part, of the cooling cavity flow channel; the tail is used for being fixed on the polar plate to block the displacement of the head.
Preferably, the head part which can be inserted into the cooling cavity flow channel is designed by comparing with the size of the cooling cavity flow channel, and is basically consistent with the internal structure of the cooling cavity flow channel; the cross section of the head is similar to the cross section of the cooling cavity flow passage, and the cross section of the head is not larger than the cross section of the cooling cavity flow passage.
Preferably, the maximum part of the cross section of the head structure is completely consistent with the minimum part of the inner cross section of the cooling cavity flow channel or the single side size is slightly smaller than 0.01-0.03 mm; the distance between the edge of the cross section of the head and the edge of the cross section of the cooling cavity flow channel is 0.01-0.03 mm.
Preferably, when the head is plugged on the cooling cavity flow channel, the length of the head is equal to the length of the cooling cavity flow channel in the extending direction of the head, or the length of the head is smaller than the length of the cooling cavity flow channel by 1-3 mm.
Preferably, the tail is fixed on the polar plate in an adhesive mode or a buckling mechanical fixing mode.
Preferably, the height of the tail part is equal to the height of the cavity opening of the cooling cavity flow channel, or the height of the tail part is 0.01-0.03 mm smaller than the height of the cavity opening of the cooling cavity flow channel; the width of the tail part is 0.1-1 mm larger than that of the cooling cavity flow channel; the protruding length of the tail part outside the cavity opening of the cooling cavity flow channel is 0-3 mm.
Preferably, when the tail is adhesively secured to the bipolar plate, the tail is secured to the plate by a coating of adhesive.
Preferably, when the tail is fixed on the bipolar plate in an adhesive manner or a mechanical fastening manner, the tail is provided with a clamping part clamped with the side wall of the bipolar plate, and the clamping part is a clamping piece extending along the tail or is of a clamping ladder structure capable of blocking the cavity opening.
Preferably, when the clamping portion is a clamping piece extending along the tail portion, the thickness of the clamping piece is 0.01-0.1 mm; when the clamping part is of a clamping ladder structure capable of blocking the cavity opening, the clamping ladder structure is clamped with polar plates on the upper side and the lower side of the cavity opening simultaneously. The clamping ladder structure can clamp the cathode plate or the anode plate on one side and clamp the anode plate or the anode plate on the other side simultaneously.
Preferably, the material of the cavity opening blocking type insert is polyamide, polyethylene terephthalate or other high temperature resistant thermoplastic resin.
According to the cavity opening blocking type plug-in unit structure for adjusting the flow of cooling liquid, the bipolar plates at different positions are plugged to different degrees, so that the control of the flow of the cooling liquid is realized, the heat dissipation degrees at different positions of a galvanic pile are balanced, and the running efficiency of the galvanic pile is improved. The cavity blocking type plug-in can be realized through an injection molding process, and a mold cavity of the adopted mold is made into a corresponding shape during manufacturing, so that a large-scale one-out-many production mode can be realized.
Drawings
FIG. 1 is a schematic diagram of a conventional cooling chamber inlet structure;
FIG. 2A is a schematic diagram of an exploded structure of a conventional galvanic pile;
FIG. 2B is a schematic diagram of a conventional temperature distribution of a galvanic pile;
fig. 3A is a schematic diagram of an overall structure of a plate with an integrated punched half-plugging structure provided in the present application;
FIG. 3B is a schematic cross-sectional view of FIG. 3A;
FIG. 4 is a schematic view of a cavity port blocking insert structure for adjusting the flow of a cooling fluid in embodiment 1 of the present application;
fig. 5A is a schematic diagram of the overall structure of the cavity blocking insert structure for adjusting the flow of the cooling liquid plugged in the cooling cavity flow channel of the polar plate in embodiment 1 of the present application;
FIG. 5B is a schematic cross-sectional view of FIG. 5A;
FIG. 6 is a schematic view of a cavity port blocking insert structure for regulating coolant flow in embodiment 2 of the present application;
fig. 7A is a schematic diagram of the overall structure of the cavity blocking insert structure for adjusting the flow rate of the cooling liquid plugged in the cooling cavity flow channel of the polar plate in embodiment 2 of the present application;
FIG. 7B is a schematic cross-sectional view of FIG. 7A;
FIG. 8 is a schematic view of a cavity port blocking insert structure for regulating coolant flow in embodiment 3 of the present application;
fig. 9A is a schematic diagram of the overall structure of the orifice blocking insert structure for adjusting the flow rate of the cooling liquid plugged in the cooling cavity flow channel of the polar plate in embodiment 3 of the present application;
fig. 9B is a schematic cross-sectional structure of fig. 9A.
Detailed Description
The invention relates to an orifice blocking type plug-in structure for regulating the flow of cooling liquid. In the fuel cell, a triple-cavity structure is used for flowing hydrogen, oxygen and cooling water, wherein the hydrogen and the oxygen are essential reaction raw materials of the fuel cell, and a great amount of heat is generated simultaneously in the process of generating potential difference through interaction of the hydrogen and the oxygen. And one part of the heat is dissipated through interaction with the external environment, and the other part of the heat is taken away through the action of cooling water, so that the reaction environment is always in a temperature range favorable for the catalyst to act. In the process of assembling a fuel cell stack, hundreds of bipolar plates are assembled together, interaction generated by bipolar plates at different positions and the external environment is inconsistent in the reaction process, interaction at two ends is strong, interaction in the middle is weak, and obvious difference exists between the reaction environment temperatures at the middle part and the two ends of the fuel cell stack, so that the fuel cell stack is an important cause of unbalanced reaction process of the fuel cell stack. The existing cooling cavity flow channel structure does not design cooling water inlets with different sizes for polar plates at different positions of a galvanic pile, and can not realize consistency control of reaction environment temperature by controlling the cooling water flow at different positions under the condition of inconsistent environment interaction. And if the cooling water inlets with different sizes are designed for the polar plates at different positions of the galvanic pile through direct die design, at least two sets of dies are required to be designed for the polar plates with the same type, and the cost is extremely high.
The applicant thinks that the optimal direction is to block the cooling cavity flow channels of the metal bipolar plates at two ends of the stack to a certain extent so as to reduce the flow rate of the cooling liquid of the cooling cavity flow channels of the metal bipolar plates at two ends. To achieve this, as shown in fig. 3A and 3B, the plate 10 with the half-plugging structure can be directly punched by modifying a punching die, but this process is complicated and has weak adjustability.
In order to further increase the adjustable control of the cooling cavity flow channels of the metal bipolar plates at the two ends of the electric pile, the problem of uneven cooling and heating at different parts of the electric pile is very necessary by designing an orifice blocking type plug-in structure for adjusting the flow of cooling liquid and plugging the cooling cavity flow channels of the metal bipolar plates at different positions to different degrees. The method is used for balancing the heat dissipation degree of different positions of the electric pile, so that the reaction environments of the different positions of the electric pile are always in a temperature range favorable for the catalyst to act, and the operation efficiency of the electric pile is improved.
The cavity opening blocking type plug-in structure for adjusting the flow of the cooling liquid mainly comprises a single plug or a plurality of plugs which can be fixed at the cavity opening of the cooling liquid, the control of the flow of the cooling liquid is realized by plugging bipolar plates at different positions to different degrees, so that the heat dissipation degrees at different positions of the electric pile are balanced, the reaction environments at different positions of the electric pile are always in a temperature range which is favorable for the catalyst to play, and the operation efficiency of the electric pile is improved. The cooling cavity flow channel is arranged in the annular polar plate, the middle part of an area surrounded by the annular polar plate is in a hollow state, one side of the cooling cavity flow channel in the hollow state is provided with a cavity opening, and a cavity opening blocking type plug-in unit structure for adjusting the flow rate of cooling liquid is plugged at the cavity opening at the inner side of the polar plate and used for adjusting the flow rate of the cooling liquid in the cooling cavity flow channel according to the plugging proportion of the plug-in unit. The cooling liquid is preferably cooling water. Different plugging proportions can be arranged at different positions of the annular polar plate to adjust the cooling rate at different positions of the polar plate, so that the temperature uniformity at each position of the polar plate is realized.
The invention provides a cavity opening blocking type plug-in unit structure for regulating the flow of cooling liquid, which realizes the control of the flow of the cooling liquid by plugging bipolar plates at different positions to different degrees. The cavity opening blocking type plug-in unit structure for regulating the flow of the cooling liquid consists of a head part capable of penetrating into a cooling cavity flow channel of the polar plate and a tail part capable of being fixed on the polar plate, wherein the head part is used for blocking the cooling cavity flow channel, so that the inflow and the flow speed of the cooling liquid are reduced in the area, blocked by the head part, of the cooling cavity flow channel; the tail is used for being fixed on the polar plate to block the displacement of the head. The bipolar plate comprises a cathode plate and an anode plate, which are called as polar plates, and a cooling cavity runner is formed between the cathode plate and the anode plate.
Preferably, the head part which can be inserted into the cooling cavity flow channel is designed by comparing with the size of the cooling cavity flow channel, and is basically consistent with the internal structure of the cooling cavity flow channel; the cross section of the head is similar to the cross section of the cooling cavity flow passage, and the cross section of the head is not larger than the cross section of the cooling cavity flow passage.
Preferably, the maximum part of the cross section of the head structure is completely consistent with the minimum part of the inner cross section of the cooling cavity flow channel or the single side size is slightly smaller than 0.01-0.03 mm; the distance between the edge of the cross section of the head and the edge of the cross section of the cooling cavity flow channel is 0.01-0.03 mm.
Preferably, when the head is plugged on the cooling cavity flow channel, the length of the head is equal to the length of the cooling cavity flow channel in the extending direction of the head, or the length of the head is smaller than the length of the cooling cavity flow channel by 1-3 mm.
Preferably, the tail is fixed on the polar plate in an adhesive mode or a buckling mechanical fixing mode.
Preferably, the height of the tail part is equal to the height of the cavity opening of the cooling cavity flow channel, or the height of the tail part is 0.01-0.03 mm smaller than the height of the cavity opening of the cooling cavity flow channel; the width of the tail part is 0.1-1 mm larger than that of the cooling cavity flow channel; the protruding length of the tail part outside the cavity opening of the cooling cavity flow channel is 0-3 mm.
Preferably, when the tail is adhesively secured to the bipolar plate, the tail is secured to the plate by a coating of adhesive.
Preferably, when the tail is fixed on the bipolar plate in an adhesive manner or a mechanical fastening manner, the tail is provided with a clamping part clamped with the side wall of the bipolar plate, and the clamping part is a clamping piece extending along the tail or is of a clamping ladder structure capable of blocking the cavity opening.
Preferably, when the clamping portion is a clamping piece extending along the tail portion, the thickness of the clamping piece is 0.01-0.1 mm; when the clamping part is of a clamping ladder structure capable of blocking the cavity opening, the clamping ladder structure is clamped with polar plates on the upper side and the lower side of the cavity opening simultaneously. The clamping ladder structure can clamp the cathode plate or the anode plate on one side and clamp the anode plate or the anode plate on the other side simultaneously.
Preferably, the material of the cavity opening blocking type insert is polyamide, polyethylene terephthalate or other high temperature resistant thermoplastic resin.
According to the cavity opening blocking type plug-in unit structure for adjusting the flow of cooling liquid, the bipolar plates at different positions are plugged to different degrees, so that the control of the flow of the cooling liquid is realized, the heat dissipation degrees at different positions of a galvanic pile are balanced, and the running efficiency of the galvanic pile is improved. The cavity blocking type plug-in can be realized through an injection molding process, and a mold cavity of the adopted mold is made into a corresponding shape during manufacturing, so that a large-scale one-out-many production mode can be realized.
The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.
Example 1:
as shown in fig. 4 and 5, a schematic view of an orifice blocking type insert structure 20 (hereinafter referred to simply as an insert) for adjusting the flow rate of a cooling liquid provided in embodiment 1 is mainly composed of a head portion 1 that can be inserted into a cooling cavity flow channel 11 of a plate 10 and a tail portion 2 that is fixed to the plate 10 by bonding, and is implemented by an injection molding process, and the injection molding material used is polyethylene terephthalate. The head 1 which can be inserted into the cooling chamber flow channel 11 is designed by comparing the size of the cooling chamber flow channel 11, and basically corresponds to the internal structure of the cooling chamber flow channel 11. The head 1 and the tail 2 are smaller than the cooling cavity flow passage 11, so that the cooling cavity flow passage is a structure connected by bonding, and the bonding interface is closed, so that water leakage can be prevented. The overall cross-sectional size of the insert 20 is slightly smaller than the size of the cooling cavity flow channel 11, so that the area of the cooling cavity flow channel 11 can be conveniently adjusted and plugged, and the insert can be disassembled and reassembled as required after being fixed.
As shown in fig. 5, the single-side dimension of the cross section of the insert 20 is 0.01-0.03 mm smaller than the single-side dimension of the cross section of the cooling cavity flow channel 11, and preferably the single-side dimension of the cross section of the insert 20 is 0.01mm smaller than the single-side dimension of the cross section of the cooling cavity flow channel 11. The cross section of the insert 20 includes two dimensions, namely, the thickness and the width, of the insert 20 are the same or slightly smaller than the dimensions of the cooling cavity flow channel 11, but the term of the internal cross section is more exact because the cooling cavity flow channel 11 may have not only the length and the width, but also rounded corners and the like. That is, the cross section of the insert 20 is 0.01-0.03 mm smaller than the cross section of the cooling cavity flow passage 11.
The structural length of the head 1 is completely identical to or slightly shorter than that of the cooling cavity flow channel 11 by 1-3 mm, and preferably the length of the head 1 is 1mm shorter than that of the cooling cavity flow channel 11. The length here refers to the direction perpendicular to the cross-section described in the preceding paragraph, which is shorter than the cooling chamber after the head 1 has been plugged into the cooling chamber, so that it is ensured that the cooling liquid can pass through the gap in the head 1. For example, the cooling chamber is 3cm long overall, and the length of the head 1 should be less than 3cm, otherwise interference with the structure inside the flow channel occurs.
The structural height of the tail 2 fixed on the polar plate 10 in an adhesive mode is 0.01 mm-0.03 mm smaller than the inlet cavity opening of the cooling cavity, so that the tail 2 is conveniently adhered on the polar plate 10. The width of the tail part 2 is 0.4mm wider than that of the cooling cavity flow channel 11, and the length of the tail part protruding out of the cavity opening is 1mm, so that the tail part is convenient to adjust the position or grasp during disassembly and recombination. According to the embodiment, the cooling cavity flow channel 11 is plugged according to the arrangement shown in fig. 5, so that the flow of cooling water can be reduced to 67% when the cooling water is not plugged, the heat dissipation degree of the two ends of the electric pile is reduced, the reaction environment of the electric pile at the position is in a temperature range favorable for the catalyst to act, and the operation efficiency of the electric pile is improved. The plugging proportion can be set according to the degree of plugging, and the plug-in unit 20 can adjust the cooling cavity flow channel 11 within the range of 1% -99% plugging, so as to control the flow rate of the cooling liquid in the cooling cavity flow channel 11.
Example 2:
as shown in fig. 6, a schematic view of a cavity blocking insert structure 20 for adjusting the flow of cooling liquid provided in embodiment 2 is mainly composed of a head portion 1 that can be inserted into a cooling cavity flow channel 11 and a tail portion 2 that is fixed on a polar plate 10 by means of a snap-fit manner, and is realized by an injection molding process, and the injection molding material used is polyamide. The head 1 which can be inserted into the cooling chamber flow channel 11 is designed by comparing the size of the cooling chamber flow channel 11, and basically corresponds to the internal structure of the cooling chamber flow channel 11.
As shown in FIG. 7, the cross-sectional side dimension of the insert 20 is preferably 0.03mm smaller than the inner side dimension of the cooling cavity flow passage 11 and 1mm shorter than the cooling cavity flow passage 11.
The difference between this embodiment and embodiment 1 is that the tail 2 of the insert 20 is fastened to the pole plate 10 by means of a snap-fit. Wherein, the tail 2 of the plug-in unit 20 can be provided with a clamping part 3 clamped with the side wall of the polar plate 10, and the clamping part 3 is preferably a clamping piece extending along the tail 2. The tail 2 structure fixed on the polar plate 10 by a single-side buckling mode is clamped on the upper surface of the polar plate 10, the height is 0.03mm, the width is 0.7mm wider than the cooling cavity flow channel 11, and the length protruding out of the cavity opening is 3mm. By blocking the cooling cavity flow channel 11 according to the arrangement shown in fig. 7, the flow of cooling water can be reduced to 50% of that when not blocked, the heat dissipation degree of the two ends of the electric pile is reduced, the reaction environment of the electric pile at the position is in a temperature range favorable for the catalyst to act, and the operation efficiency of the electric pile is improved.
Example 3:
as shown in fig. 8, a schematic view of a cavity blocking insert structure 20 for adjusting the flow rate of cooling liquid is provided in embodiment 3, and mainly comprises a head portion 1 which can be inserted into a cooling cavity flow channel 11.
The difference between this embodiment and embodiment 2 is that the head portion 1 of the insert 20 is provided with a plurality of tail portions 22, the insert 20 has a plurality of groups of parallel structures, and can be directly fastened and fixed on the polar plate 10 through the head portion 1, and the injection molding process is implemented, and the injection molding material used is polyamide. The head 1 which can be inserted into the cooling chamber flow channel 11 is designed by comparing the size of the cooling chamber flow channel 11, and basically corresponds to the internal structure of the cooling chamber flow channel 11. The tail 2 of the plug-in unit 20 may be provided with a clamping portion 3 clamped with the side wall of the polar plate 10, and the clamping portion 3 is preferably a clamping step structure disposed on the upper and lower surfaces of the tail 2, and the clamping step structure can seal the cavity opening.
As shown in FIG. 9, the single-side size of the cross section of the head 1 is smaller than the single-side size of the inside of the cooling cavity flow passage 11 by 0.02mm, and the length is shorter than the length of the cooling cavity flow passage 11 by 2mm. The width of the tail 2 structure card is 0.3mm wider than that of the cooling cavity flow channel 11, and the length of the tail 2 structure card protruding out of the cavity opening is 2mm. By blocking the cooling cavity flow channel 11 according to the arrangement shown in fig. 9, the flow rate of cooling water can be reduced to 33% when not blocked, the heat dissipation degree of the two ends of the electric pile is reduced, the reaction environment of the electric pile at the position is in a temperature range favorable for the catalyst to act, and the operation efficiency of the electric pile is improved.
Example 4:
it will be understood that, similar to the design concept of embodiment 3, the difference between this embodiment and embodiment 2 is that the head portion 1 of the insert 20 is provided with a plurality of tail portions 2, and the insert 20 has a plurality of parallel structures, and mainly comprises the head portion 1 that can be inserted into the cooling cavity flow channel 11 and the tail portion 2 that is fixed on the pole plate 10 by bonding.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing embodiments of the present application have been described in detail, and specific examples have been employed herein to illustrate the principles and embodiments of the present application, the above embodiments being provided only to assist in understanding the technical solutions of the present application and their core ideas; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (8)

1. A accent blocking type plug-in components structure for adjusting coolant flow, its characterized in that: consists of a head part which can be inserted into a cooling cavity runner of the polar plate and a tail part which can be fixed on the polar plate;
the head is used for plugging the cooling cavity flow channel, so that the area plugged by the head in the cooling cavity flow channel reduces the inflow and the flow speed of the cooling liquid;
the tail part is used for being fixed on the polar plate to block the displacement of the head part; the tail part is fixed on the polar plate in an adhesive mode or a buckling mechanical fixing mode; the height of the tail part is equal to the height of the cavity opening of the cooling cavity flow channel or is 0.01-0.03 mm smaller than the height of the cavity opening of the cooling cavity flow channel; the width of the tail part is 0.1-1 mm larger than that of the cooling cavity flow channel; the protruding length of the tail part outside the cavity opening of the cooling cavity flow channel is 0-3 mm.
2. A cavity port blocking insert structure for regulating coolant flow as set forth in claim 1, wherein: the cross section of the head is similar to the cross section of the cooling cavity flow passage, and the cross section of the head is not larger than the cross section of the cooling cavity flow passage.
3. A cavity port blocking insert structure for regulating coolant flow as set forth in claim 2, wherein: the distance between the edge of the cross section of the head and the edge of the cross section of the cooling cavity flow channel is 0.01-0.03 mm.
4. A cavity port blocking insert structure for regulating coolant flow as set forth in claim 2, wherein: when the head is plugged on the cooling cavity flow channel, the length of the head is equal to the length of the cooling cavity flow channel in the extending direction of the head, or the length of the head is smaller than the length of the cooling cavity flow channel by 1-3 mm.
5. A cavity port blocking insert structure for regulating coolant flow as set forth in claim 1, wherein: when the tail part is fixed on the polar plate in an adhesive mode, the tail part is fixed on the polar plate through a smearing adhesive.
6. A cavity port blocking insert structure for regulating coolant flow as set forth in claim 1, wherein: when the tail part is fixed on the polar plate in a mode of mechanical fixing by a buckle, the tail part is provided with a clamping part clamped with the side wall of the polar plate, and the clamping part is a clamping piece extending along the tail part or is of a clamping ladder structure capable of blocking the cavity opening.
7. A cavity port blocking insert structure for regulating coolant flow as set forth in claim 6, wherein: when the clamping part is a clamping piece extending along the tail part, the thickness of the clamping piece is 0.01-0.1 mm; when the clamping part is of a clamping ladder structure capable of blocking the cavity opening, the clamping ladder structure is clamped with polar plates on the upper side and the lower side of the cavity opening simultaneously.
8. A cavity port blocking insert structure for regulating coolant flow as set forth in claim 1, wherein: the cavity opening blocking type insert is made of polyamide or polyethylene terephthalate.
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