CN114725593A - Battery cover with liquid injection and flow guide structure - Google Patents
Battery cover with liquid injection and flow guide structure Download PDFInfo
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- CN114725593A CN114725593A CN202210356094.0A CN202210356094A CN114725593A CN 114725593 A CN114725593 A CN 114725593A CN 202210356094 A CN202210356094 A CN 202210356094A CN 114725593 A CN114725593 A CN 114725593A
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- flow guide
- liquid injection
- mounting hole
- hole
- plate
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- 239000007788 liquid Substances 0.000 title claims abstract description 98
- 238000002347 injection Methods 0.000 title claims abstract description 97
- 239000007924 injection Substances 0.000 title claims abstract description 97
- 239000003792 electrolyte Substances 0.000 claims abstract description 71
- 239000004033 plastic Substances 0.000 claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000002457 bidirectional effect Effects 0.000 claims description 24
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
- H01M50/645—Plugs
- H01M50/655—Plugs specially adapted for venting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention discloses a battery cover with an injection flow guide structure, which comprises a light aluminum plate and an insulating pad; the left end and the right end of the smooth aluminum plate are provided with a cover plate cathode mounting hole and a cover plate anode mounting hole; the insulating pad is provided with an insulating pad cathode mounting hole and an insulating pad anode mounting hole; a negative plastic pad is arranged at the upper part of the cover plate negative mounting hole; the upper part of the cover plate anode mounting hole is provided with an anode plastic pad; the cover plate negative electrode mounting hole and the cover plate positive electrode mounting hole are respectively embedded with a negative electrode sealing ring and a positive electrode sealing ring; the negative electrode plastic pad, the cover plate negative electrode mounting hole, the negative electrode sealing ring and the insulating pad negative electrode mounting hole are riveted through a negative electrode pole; the positive pole plastic pad, the cover plate positive pole mounting hole, the positive pole sealing ring and the insulating pad positive pole mounting hole are riveted through the positive pole; the smooth aluminum plate is provided with a liquid injection hole; the insulating pad is provided with a flow guide hole; the guide holes are provided with guide plates. The invention can ensure the electrolyte injection quality of the battery and avoid the quality problem of the battery when the production efficiency of the battery is improved by increasing the electrolyte injection pressure.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery cover with an injection and flow guide structure.
Background
With the development of science and technology, square batteries are used in many fields, where the maximum demand is in the fields of power, energy storage and two-wheeled vehicles.
At present, in the production process of square battery products, the liquid injection efficiency of the battery is high and low, and the production efficiency of the battery is directly influenced. In order to accelerate the battery liquid injection efficiency, most battery manufacturers increase the liquid injection pressure.
However, after the liquid injection pressure of the battery is increased, the flow rate of the injected liquid is increased, the kinetic energy of the electrolyte is increased, the impact force on the battery pole group is increased, and the problems that the pole pieces fall off and the materials are deficient and the like occur to part of the pole groups due to the impact force of the electrolyte are caused.
Therefore, there is an urgent need to develop a technology capable of solving the above technical problems.
Disclosure of Invention
The invention aims to provide a battery cover with a liquid injection and diversion structure, aiming at the technical defects in the prior art.
Therefore, the invention provides a battery cover with an injection flow guide structure, which comprises a light aluminum plate and an insulating pad which are distributed up and down;
the left end and the right end of the light aluminum plate are respectively provided with a cover plate cathode mounting hole and a cover plate anode mounting hole;
the insulating pad is provided with an insulating pad cathode mounting hole and an insulating pad anode mounting hole at the positions corresponding to the cover plate cathode mounting hole and the cover plate anode mounting hole respectively;
a negative plastic pad is arranged at the upper part of the cover plate negative mounting hole;
the upper part of the cover plate anode mounting hole is provided with an anode plastic pad;
a negative sealing ring and a positive sealing ring are respectively embedded into the lower parts of the cover plate negative mounting hole and the cover plate positive mounting hole from bottom to top;
the negative electrode plastic pad, the cover plate negative electrode mounting hole at the left end of the smooth aluminum plate, the negative electrode sealing ring and the insulating pad negative electrode mounting hole at the left end of the insulating pad are riveted and fixed together through a negative electrode pole;
the positive plastic pad, the cover plate positive mounting hole at the right end of the smooth aluminum plate, the positive sealing ring and the insulating pad positive mounting hole at the right end of the insulating pad are riveted and fixed together through a positive pole column;
the smooth aluminum plate is provided with a liquid injection hole;
the insulating pad is provided with a diversion hole at the position corresponding to the liquid injection hole;
a hollow guide plate is arranged on the guide hole;
the guide plate comprises an insulation plate main body and a guide structure;
the insulation board main body is positioned above the flow guide structure;
the top of the insulating plate main body is provided with an electrolyte inlet hole, and the upper part of the electrolyte inlet hole is directly communicated with the electrolyte injection hole;
an electrolyte liquid outlet hole is formed between the lower part of the insulating plate main body and the flow guide structure;
the lower part of the electrolyte inlet hole is communicated with the inside of the battery through the electrolyte outlet hole;
the flow guide structure of the flow guide plate comprises a bidirectional flow guide structure and a unidirectional flow guide structure;
when the flow guide structure of the flow guide plate adopts a bidirectional flow guide structure, the bidirectional flow guide structure specifically comprises a bidirectional flow guide convex block protruding upwards;
the bidirectional flow guide lug comprises two first flow guide blocks which are distributed in bilateral symmetry;
the two first flow guide blocks are positioned right below the liquid injection hole;
an electrolyte liquid outlet hole is respectively formed between the lower part of the insulating plate main body and the two first flow guide blocks;
when the flow guide structure of the flow guide plate adopts a one-way flow guide structure, the one-way flow guide structure comprises a one-way flow guide block which is downwards inclined;
one end of the unidirectional flow guide block is connected with the lower part of one end of the insulating plate main body;
an electrolyte liquid outlet hole is arranged between the other end of the one-way flow guide block and the lower part of the other end of the insulating plate main body.
Preferably, the two first flow guide blocks are connected with each other, and the connecting part of the two first flow guide blocks is a protruding part;
the center point of the protrusion part is positioned on the same straight line with the central axis of the liquid injection hole;
the intersection included angle of the two first flow guide blocks is an obtuse angle.
Preferably, the intersection included angle between the unidirectional flow guide block and the insulating plate main body is an acute angle.
Preferably, the liquid injection hole comprises an upper liquid injection hole section and a lower liquid injection hole section which are distributed up and down;
the upper liquid injection hole section is in an inverted truncated cone shape;
the lower liquid injection hole section is cylindrical;
the bottom inner diameter of the upper liquid injection hole section is larger than the top inner diameter of the lower liquid injection hole section;
the bottom inner diameter of the lower liquid injection hole section is smaller than the top inner diameter of an electrolyte liquid inlet hole in the insulating plate main body of the guide plate.
Preferably, when the guide structure of guide plate adopts one-way guide structure, the open area in electrolyte play liquid hole is greater than the bottom open area of the lower liquid hole section in the liquid hole of annotating on the smooth aluminum plate.
Preferably, the diameter of the top opening of the electrolyte inlet hole at the top of the guide plate is larger than the diameter of the circular opening at the top of the upper liquid injection hole section in the liquid injection hole.
Preferably, the transverse middle position of the smooth aluminum plate is provided with an air leakage opening, and the upper part of the air leakage opening is covered and welded with an explosion-proof valve protective film;
the bottom of the air leakage opening is provided with an explosion-proof valve;
correspondingly, the insulating pad is provided with an air ventilation net at a position corresponding to the explosion-proof valve.
Preferably, the column at the top of the negative pole post sequentially penetrates through the insulating pad negative pole mounting hole at the left end of the insulating pad, the negative pole sealing ring, the cover plate negative pole mounting hole at the left end of the smooth aluminum plate and the through hole reserved in the negative pole plastic pad from bottom to top and is riveted with the top of the negative pole plastic pad.
Preferably, the cylinder at the top of the positive pole column sequentially penetrates through the insulating pad positive mounting hole at the right end of the insulating pad, the positive sealing ring, the cover plate positive mounting hole at the right end of the smooth aluminum plate and the reserved through hole in the positive plastic pad from bottom to top and is then riveted with the top of the positive plastic pad.
Preferably, the negative electrode plastic pad and the positive electrode plastic pad are insulating plastic gaskets.
Compared with the prior art, the invention provides the battery cover with the liquid injection and flow guide structure, the structure design is scientific, on one hand, a guide plate (the guide plate is positioned on an insulating pad) is arranged under a liquid injection hole for injecting electrolyte, thereby preventing the problems of pole piece powder falling, material shortage and the like caused by the direct impact of the electrolyte on the lower pole group, on the other hand, considering that the liquid injection efficiency of the electrolyte is influenced to a certain extent after the guide plate is added, the novel guide structure is specially designed on the guide plate, the resistance of the guide plate to the electrolyte can be reduced, thereby reducing the kinetic energy loss of the electrolyte, when the production efficiency of the battery is improved by increasing the electrolyte injection pressure, the electrolyte injection quality of the battery is favorably ensured, the quality problem in battery production is avoided, and the production practice significance is great.
Drawings
Fig. 1 is a schematic three-dimensional exploded view of a battery cover with an injection diversion structure according to the present invention;
fig. 2 is a schematic cross-sectional view of a battery cover with a liquid injection and diversion structure according to the present invention;
FIG. 3 is a schematic diagram of the position relationship between the liquid injection hole and the diversion plate in the battery cover with the liquid injection diversion structure according to the present invention;
fig. 4a is a schematic view of a three-dimensional structure of a battery cover with a liquid injection and flow guide structure when the flow guide structure of a flow guide plate adopts a bidirectional flow guide structure and is placed upside down according to the present invention;
fig. 4b is an enlarged schematic cross-sectional view of a peripheral structure of a battery cover with a liquid injection and flow guide structure according to the present invention, when the flow guide structure of a flow guide plate adopts a bidirectional flow guide structure;
fig. 5a is a schematic view of a three-dimensional structure of a battery cover with a liquid injection and flow guide structure when the flow guide structure of a flow guide plate adopts a one-way flow guide structure and is placed upside down according to the present invention;
fig. 5b is an enlarged schematic cross-sectional view of a peripheral structure of a battery cover with a liquid injection and flow guide structure according to the present invention, when the flow guide structure of the flow guide plate adopts a one-way flow guide structure.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 5b, the present invention provides a battery cover with an injection and diversion structure, which comprises a light aluminum plate 100 and an insulating pad 200 distributed up and down;
the left end and the right end of the light aluminum plate 100 are respectively provided with a cover plate cathode mounting hole 102 and a cover plate anode mounting hole 101;
the insulating pad 200 is provided with an insulating pad cathode mounting hole 202 and an insulating pad anode mounting hole 201 at positions corresponding to the cover plate cathode mounting hole 102 and the cover plate anode mounting hole 101 respectively;
the upper part of the cover plate negative electrode mounting hole 102 is provided with a negative electrode plastic pad 21;
the upper part of the cover plate anode mounting hole 101 is provided with an anode plastic pad 21;
a negative sealing ring 22 and a positive sealing ring 12 are respectively embedded in the lower parts of the cover plate negative mounting hole 102 and the cover plate positive mounting hole 101 from bottom to top;
the negative electrode plastic pad 21, the cover plate negative electrode mounting hole 102 at the left end of the smooth aluminum plate 100, the negative electrode sealing ring 22 and the insulating pad negative electrode mounting hole 202 at the left end of the insulating pad 200 are riveted and fixed together through a negative electrode post 23;
the positive plastic pad 21, the cover plate positive mounting hole 101 at the right end of the smooth aluminum plate 100, the positive sealing ring 22 and the insulating pad positive mounting hole 201 at the right end of the insulating pad 200 are riveted and fixed together through a positive pole post 13;
the smooth aluminum plate 100 is provided with a liquid injection hole 7;
the insulating pad 200 is provided with a diversion hole 8 at the position corresponding to the liquid injection hole 7;
a hollow guide plate 9 is arranged on the guide hole 8;
the guide plate 9 comprises an insulating plate main body 90 and a guide structure;
the insulating plate main body 90 is positioned above the flow guide structure;
the top of the insulating plate main body 90 is provided with an electrolyte inlet hole 91, and the upper part of the electrolyte inlet hole 91 is directly communicated with the electrolyte injection hole 7 (without a barrier);
an electrolyte outlet hole 92 is formed between the lower part of the insulating plate main body 90 and the flow guide structure;
the lower part of the electrolyte inlet hole 91 is communicated with the interior of the battery (the interior of a specific battery pole group, namely an object to be injected) through the electrolyte outlet hole 92.
In the invention, the liquid injection hole 7 comprises an upper liquid injection hole section 71 and a lower liquid injection hole section 72 which are distributed up and down;
the upper liquid injection hole section 71 is in an inverted truncated cone shape;
the priming hole section 72 is cylindrical in shape;
the bottom inner diameter of the upper liquid injection hole section 71 is larger than the top inner diameter of the lower liquid injection hole section 72;
the bottom inner diameter of the lower liquid injection hole section 72 is smaller than the top inner diameter of the electrolyte liquid inlet hole 91 in the insulating plate main body 90 of the guide plate 9.
In the present invention, the flow guiding structure of the flow guiding plate 9 includes two types, i.e., a bidirectional flow guiding structure and a unidirectional flow guiding structure.
In the present invention, in terms of specific implementation, referring to fig. 4a and 4b, when the flow guiding structure of the flow guiding plate 9 adopts a bidirectional flow guiding structure (i.e. as a bidirectional flow guiding plate), the bidirectional flow guiding structure specifically includes an upward protruding bidirectional flow guiding protrusion;
the bidirectional flow guide projection comprises two first flow guide blocks 93 which are distributed in bilateral symmetry;
two first flow guide blocks 93 positioned right below the liquid injection hole 7;
an electrolyte outlet hole 92 (namely, two electrolyte outlet holes 92 in total) is respectively arranged between the lower part of the insulating plate main body 90 and the two first flow guide blocks 93.
In a specific implementation, the two first flow guiding blocks 93 are connected with each other, and a connecting part of the two first flow guiding blocks is a protruding part;
the center point of the protrusion is located on the same line as the center axis of the liquid inlet 7.
In a specific implementation, the intersection included angle of the two first flow guiding blocks 93 is an obtuse angle (e.g., 120 degrees).
It should be noted that, when the guide structure of the guide plate 9 adopts a bidirectional guide structure (i.e. when used as a bidirectional guide plate), the main structure of the guide plate is provided with two first guide blocks 93 (i.e. bidirectional guide bumps) which are bilaterally symmetrical and form a certain angle with each other on the insulating pad right below the liquid injection hole, and the guide plate is provided with two electrolyte liquid outlet holes. Meanwhile, the insulating plate main body 90 of the structure comprises two bilaterally symmetrical insulating blocks 901, the distance between the two insulating blocks 901 is larger than the width of the bidirectional flow guide bump (comprising the two first flow guide blocks 93), and the side core pulling mechanism of a mold for manufacturing a product is prevented from increasing the mold cost.
In the present invention, in a specific implementation, referring to fig. 5a and 5b, when the flow guiding structure of the flow guiding plate 9 adopts a one-way flow guiding structure (i.e. as a one-way flow guiding plate), the one-way flow guiding structure includes a downward-inclined one-way flow guiding block 94;
one end of the one-way guide block 94 is connected with the lower part of one end of the insulating plate main body 90;
an electrolyte outlet hole 92 (namely, only one electrolyte outlet hole 92) is formed between the other end of the one-way flow guide block 94 and the lower part of the other end of the insulating plate main body 90.
In a specific implementation, the intersection included angle between the one-way flow guide block 94 and the insulating plate main body 90 is an acute angle (e.g., 45 degrees).
It should be noted that when the flow guiding structure of the flow guiding plate 9 adopts a one-way flow guiding structure (i.e. when the flow guiding plate is used as a one-way flow guiding plate), the one-way flow guiding block 94 is arranged right below the liquid injection hole, and the one-way flow guiding block 94 has a certain inclination. In the structure, only one electrolyte outlet hole 92 is formed in the insulating pad, and the opening area of the electrolyte outlet hole 92 is larger than the bottom opening area of the lower electrolyte inlet hole section 72 in the electrolyte inlet hole 7 in the aluminum sheet 100.
Compared with a bidirectional guide plate, the unidirectional guide plate has the advantages that: can control electrolyte in the inside play liquid direction of battery, the influence of the inside more fragile part of greatly reduced electrolyte impact force to the battery (for example, positive negative pole material probably is strikeed and drops on the pole piece to with positive pole and diaphragm, negative pole and diaphragm by hugging closely the state impact for the state that scatters), its shortcoming is: compared with a bidirectional guide plate, the energy loss brought to the electrolyte is larger.
In the present invention, the smooth aluminum plate is a common flat plate type battery cover plate.
In the invention, in a concrete implementation manner, a transverse middle position of a smooth aluminum plate 100 is provided with an air leakage opening 3, and the upper part of the air leakage opening 3 is covered and welded with an explosion-proof valve protection film 4;
the bottom of the air leakage opening 3 is provided with an explosion-proof valve 5;
correspondingly, the insulating mat is provided with a venting net 6 at a position corresponding to the explosion-proof valve 5 (i.e. a position directly below the explosion-proof valve 5).
It should be noted that, according to the present invention, through the arrangement of the explosion-proof valve 5, when the internal air pressure of the battery mounted on the battery cover plate exceeds the pressure that can be borne by the explosion-proof valve 5, the internal air pressure of the battery can be timely discharged, and finally, the effect of pressure reduction is achieved, so that the internal air pressure of the battery is kept in a relatively stable state, and the use safety of the battery is further ensured.
In the invention, in a concrete implementation, a cylinder (the function is equal to that of a rivet core) at the top of the cathode pole 23 sequentially penetrates through the insulating pad cathode mounting hole 202 at the left end of the insulating pad 200, the cathode sealing ring 22, the cover plate cathode mounting hole 102 at the left end of the smooth aluminum plate 100 and a through hole reserved on the cathode plastic pad 21 from bottom to top, and then is riveted with the top of the cathode plastic pad 21;
the cylinder (the function is equal to the nail core of a rivet) at the top of the positive pole column 13 sequentially penetrates through the insulating pad positive mounting hole 201 at the right end of the insulating pad 200, the positive sealing ring 12, the cover plate positive mounting hole 101 at the right end of the smooth aluminum plate 100 and a through hole reserved in the positive plastic pad 11 from bottom to top, and then is riveted with the top of the positive plastic pad 11.
In the present invention, the negative electrode plastic pad 21 and the positive electrode plastic pad 11 are preferably insulating plastic (insulating polyphenylene sulfide (PPS) plastic) gaskets.
It should be noted that, when a battery manufacturer increases the pressure of liquid injection in order to accelerate the liquid injection efficiency of the battery, and further increases the impact force of the electrolyte on the battery pole group, in order to avoid the problems of pole piece powder falling, material shortage and the like of the pole group due to the impact force of the electrolyte, for the invention, on one hand, a guide plate (the guide plate is positioned on an insulating pad) is arranged right below the liquid injection hole for injecting the electrolyte, so that the problems of pole piece powder falling, material shortage and the like caused by the direct impact of the electrolyte on the pole group below are prevented, and on the other hand, considering that the efficiency of the electrolyte is influenced to a certain extent after the guide plate is increased, a novel flow guide structure is specially designed on the guide plate, so that the resistance of the guide plate to the electrolyte can be reduced, and the kinetic energy loss of the electrolyte is reduced.
It should be noted that, for the battery cover of the present invention, the assembly is assembled according to the corresponding structural components shown in fig. 1 and fig. 2, and after the assembly is assembled, the assembly is placed in an injection mold for injection molding and encapsulation, so that the battery cover can be manufactured.
For the present invention, the electrolyte guiding structure (i.e. the guiding plate) is on the insulating pad 200 (specifically, the insulating rubber pad), and the guiding plate is right below the liquid injection hole, and the whole width of the guiding plate is larger than the diameter of the liquid injection hole 7 (specifically, the specific requirement is that the diameter of the top opening of the electrolyte inlet hole 91 at the top of the guiding plate 9 is larger than the diameter of the top circular opening of the upper liquid injection hole section 71 in the liquid injection hole 7), so as to prevent the guiding plate (also used as the blocking plate) from completely blocking the electrolyte, thereby preventing the electrolyte from directly impacting the electrode group below during the liquid injection.
According to the invention, the vertical distance between the lower part of the liquid injection hole and the flow guide structure (the one-way flow guide structure or the two-way flow guide structure) in the flow guide plate is set to be larger as far as possible on the premise of not hindering assembly and insulation, so that the kinetic energy loss of the flow guide plate to the electrolyte is reduced. The structure of the guide plate mainly comprises the following functions: firstly, prevent to be located the utmost point ear of the battery utmost point group of light aluminum plate below and light aluminum plate (be battery apron promptly) emergence contact and cause the short circuit problem, two when annotating the liquid, play the water conservancy diversion effect to electrolyte.
In summary, compared with the prior art, the battery cover with the liquid injection and diversion structure provided by the invention has a scientific structural design, on one hand, the guide plate (the guide plate is positioned on the insulating pad) is arranged right below the liquid injection hole for injecting the electrolyte, so that the problems of pole piece powder falling, material shortage and the like caused by the fact that the electrolyte directly impacts the lower pole group are prevented, on the other hand, the liquid injection efficiency of the electrolyte is influenced to a certain extent after the guide plate is added, and therefore, the novel diversion structure is specially designed on the guide plate, the resistance of the guide plate to the electrolyte can be reduced, the kinetic energy loss of the electrolyte is reduced, and therefore, when the production efficiency of the battery is improved by increasing the liquid injection pressure of the electrolyte, the liquid injection quality of the battery is favorably guaranteed, the quality problem of the battery production is avoided, and the battery cover has great production and practice significance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The battery cover with the liquid injection and flow guide structure is characterized by comprising a smooth aluminum plate (100) and an insulating pad (200) which are distributed up and down;
the left end and the right end of the light aluminum plate (100) are respectively provided with a cover plate cathode mounting hole (102) and a cover plate anode mounting hole (101);
the insulating pad (200) is provided with an insulating pad cathode mounting hole (202) and an insulating pad anode mounting hole (201) at positions corresponding to the cover plate cathode mounting hole (102) and the cover plate anode mounting hole (101);
a negative plastic pad (21) is arranged at the upper part of the cover plate negative mounting hole (102);
the upper part of the cover plate anode mounting hole (101) is provided with an anode plastic pad (21);
a negative sealing ring (22) and a positive sealing ring (12) are respectively embedded into the lower parts of the cover plate negative mounting hole (102) and the cover plate positive mounting hole (101) from bottom to top;
the negative pole plastic pad (21), the cover plate negative pole mounting hole (102) at the left end of the smooth aluminum plate (100), the negative pole sealing ring (22) and the insulating pad negative pole mounting hole (202) at the left end of the insulating pad (200) are riveted and fixed together through a negative pole post (23);
the positive pole plastic pad (21), the cover plate positive pole mounting hole (101) at the right end of the smooth aluminum plate (100), the positive pole sealing ring (22) and the insulating pad positive pole mounting hole (201) at the right end of the insulating pad (200) are riveted and fixed together through a positive pole post (13);
the smooth aluminum plate (100) is provided with a liquid injection hole (7);
the insulating pad (200) is provided with a diversion hole (8) at the position corresponding to the liquid injection hole (7);
a hollow guide plate (9) is arranged on the guide hole (8);
the guide plate (9) comprises an insulating plate main body (90) and a guide structure;
the insulating plate main body (90) is positioned above the flow guide structure;
the top of the insulating plate main body (90) is provided with an electrolyte inlet hole (91), and the upper part of the electrolyte inlet hole (91) is directly communicated with the electrolyte injection hole (7);
an electrolyte outlet hole (92) is formed between the lower part of the insulating plate main body (90) and the flow guide structure;
the lower part of the electrolyte inlet hole (91) is communicated with the inside of the battery through an electrolyte outlet hole (92);
the flow guide structure of the flow guide plate (9) comprises a bidirectional flow guide structure and a unidirectional flow guide structure;
when the flow guide structure of the flow guide plate (9) adopts a bidirectional flow guide structure, the bidirectional flow guide structure specifically comprises an upward protruding bidirectional flow guide lug;
the bidirectional flow guide lug comprises two first flow guide blocks (93) which are distributed in bilateral symmetry;
the two first flow guide blocks (93) are positioned right below the liquid injection hole (7);
an electrolyte outlet hole (92) is respectively formed between the lower part of the insulating plate main body (90) and the two first flow guide blocks (93);
when the flow guide structure of the flow guide plate (9) adopts a one-way flow guide structure, the one-way flow guide structure comprises a one-way flow guide block (94) which is inclined downwards;
one end of the one-way flow guide block (94) is connected with the lower part of one end of the insulating plate main body (90);
an electrolyte outlet hole (92) is arranged between the other end of the one-way flow guide block (94) and the lower part of the other end of the insulating plate main body (90).
2. The battery cover with injection guiding structure of claim 1, wherein two first guiding blocks (93) are connected to each other, and the connection part of the two first guiding blocks is a protrusion;
the central point of the protrusion part is positioned on the same straight line with the central axis of the liquid injection hole (7);
the intersection included angle of the two first flow guide blocks (93) is an obtuse angle.
3. The battery cover with the liquid injection and flow guide structure according to claim 1, wherein the intersecting angle of the one-way flow guide block (94) and the insulating plate body (90) is an acute angle.
4. The battery cover with the liquid injection and flow guide structure according to claim 1, wherein the liquid injection hole (7) comprises an upper liquid injection hole section (71) and a lower liquid injection hole section (72) which are distributed up and down;
the upper liquid injection hole section (71) is in an inverted truncated cone shape;
the lower liquid injection hole section (72) is cylindrical;
the inner diameter of the bottom of the upper liquid injection hole section (71) is larger than the inner diameter of the top of the lower liquid injection hole section (72);
the bottom inner diameter of the lower liquid injection hole section (72) is smaller than the top inner diameter of an electrolyte liquid inlet hole (91) in an insulating plate main body (90) of the guide plate (9).
5. The battery cover with liquid injection and diversion structure according to claim 1, wherein when the diversion structure of the diversion plate (9) adopts a one-way diversion structure, the opening area of the electrolyte liquid outlet hole (92) is larger than the bottom opening area of the lower liquid injection hole section (72) in the liquid injection hole (7) on the aluminum sheet (100).
6. The battery cover with liquid injection and flow guide structure according to claim 1, wherein the top opening diameter of the electrolyte inlet hole (91) at the top of the flow guide plate (9) is larger than the diameter of the top circular opening of the upper liquid injection hole section (71) in the liquid injection hole (7).
7. The battery cover with the liquid injection and flow guide structure according to claim 1, wherein a gas release opening (3) is formed in the transverse middle of the aluminum plate (100), and an explosion-proof valve protection film (4) is welded on the upper portion of the gas release opening (3);
the bottom of the air leakage port (3) is provided with an explosion-proof valve (5);
correspondingly, the insulating pad is provided with an air ventilation net (6) at the position corresponding to the explosion-proof valve (5).
8. The battery cover with the liquid injection and diversion structure as claimed in claim 1, wherein a column body at the top of the negative electrode post (23) sequentially penetrates through the insulating pad negative electrode mounting hole (202) at the left end of the insulating pad (200), the negative electrode sealing ring (22), the cover plate negative electrode mounting hole (102) at the left end of the smooth aluminum plate (100) and a through hole reserved on the negative electrode plastic pad (21) from bottom to top, and then is riveted with the top of the negative electrode plastic pad (21).
9. The battery cover with the liquid injection and diversion structure as claimed in claim 1, wherein a cylinder at the top of the positive pole post (13) sequentially penetrates through the insulating pad positive mounting hole (201) at the right end of the insulating pad (200), the positive sealing ring (12), the cover plate positive mounting hole (101) at the right end of the smooth aluminum plate (100) and a through hole reserved on the positive plastic pad (11) from bottom to top, and then is riveted with the top of the positive plastic pad (11).
10. The battery cover with liquid injection and diversion structure as claimed in any of claims 1 to 9, wherein the negative electrode plastic gasket (21) and the positive electrode plastic gasket (11) are insulating plastic gaskets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210356094.0A CN114725593A (en) | 2022-04-06 | 2022-04-06 | Battery cover with liquid injection and flow guide structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210356094.0A CN114725593A (en) | 2022-04-06 | 2022-04-06 | Battery cover with liquid injection and flow guide structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114725593A true CN114725593A (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210356094.0A Pending CN114725593A (en) | 2022-04-06 | 2022-04-06 | Battery cover with liquid injection and flow guide structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114725593A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454494A (en) * | 2023-06-16 | 2023-07-18 | 深圳海辰储能控制技术有限公司 | Lower plastic, energy storage device and electric equipment |
-
2022
- 2022-04-06 CN CN202210356094.0A patent/CN114725593A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454494A (en) * | 2023-06-16 | 2023-07-18 | 深圳海辰储能控制技术有限公司 | Lower plastic, energy storage device and electric equipment |
| CN116454494B (en) * | 2023-06-16 | 2023-09-01 | 深圳海辰储能控制技术有限公司 | Lower plastic, energy storage device and electric equipment |
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