CN117638339B - Cover plate assembly and battery - Google Patents
Cover plate assembly and battery Download PDFInfo
- Publication number
- CN117638339B CN117638339B CN202410102766.4A CN202410102766A CN117638339B CN 117638339 B CN117638339 B CN 117638339B CN 202410102766 A CN202410102766 A CN 202410102766A CN 117638339 B CN117638339 B CN 117638339B
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- China
- Prior art keywords
- liquid injection
- plate
- insulating
- substrate
- grating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002347 injection Methods 0.000 claims abstract description 114
- 239000007924 injection Substances 0.000 claims abstract description 114
- 239000007788 liquid Substances 0.000 claims abstract description 108
- 239000000758 substrate Substances 0.000 claims abstract description 48
- 230000001681 protective effect Effects 0.000 claims abstract description 28
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000011244 liquid electrolyte Substances 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- 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
-
- 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
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a cover plate assembly and a battery, and relates to the technical field of battery manufacturing. The cover plate component comprises a base plate, an insulating plate and a pole; the base plate is provided with a liquid injection hole; the insulating plate is connected with the substrate; the insulating plate is provided with a liquid injection protective grating, and the liquid injection protective grating protrudes out of the outer surface of one side of the insulating plate, which is close to the substrate, and corresponds to the liquid injection hole; the pole is arranged on the base plate and the insulating plate in a penetrating way. The battery includes a cap plate assembly. The cover plate component can effectively prevent the needle head of the liquid injection needle from damaging the battery cell when the liquid injection needle injects liquid.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a cover plate assembly and a battery.
Background
In the field of batteries, liquid injection refers to a process of controlling injection of a liquid electrolyte into a battery from a liquid injection port. In the related art, liquid electrolyte is mostly injected into the battery cell by adopting a liquid injection needle, however, the needle head of the liquid injection needle penetrates through the liquid injection hole on the cover plate, so that the battery cell is easily poked when the liquid electrolyte is injected into the battery cell, and the battery cell is damaged.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a cover plate assembly and a battery.
The invention provides the following technical scheme:
in a first aspect, the present invention provides a cover plate assembly comprising:
a base plate provided with a liquid injection hole;
an insulating plate connected to the substrate; the liquid injection protection grating is arranged on the insulating plate, protrudes out of the outer surface of one side of the insulating plate, which is close to the substrate, and corresponds to the liquid injection hole;
and the polar post penetrates through the base plate and the insulating plate.
In one possible embodiment, the substrate has an explosion proof portion; an insulating protection grid corresponding to the explosion-proof part is arranged on the insulating plate; the liquid injection protective grille is fixed on one side of the insulating protective grille, which is close to the substrate.
In one possible implementation manner, a protection groove is arranged on the insulating plate, one end of the protection groove along the first direction is provided with an opening, and the opening corresponds to the explosion-proof part and the liquid injection hole; the insulation protection grille is arranged on the inner wall of the protection groove along the first direction.
In one possible embodiment, the explosion-proof part is provided at the geometric center of the substrate; the cover plate assembly comprises two polar posts which are symmetrically arranged on two sides of the explosion-proof part along a second direction; the liquid injection hole is formed in the center of the substrate along the second direction and is positioned at one side of the explosion-proof part along the third direction; the second direction is perpendicular to the first direction; the third direction is perpendicular to the first direction and the second direction.
In one possible embodiment, the pole comprises an end cap and a base; one end of the base is arranged on one side of the insulating plate away from the substrate, and the other end of the base penetrates through the insulating plate and the substrate; the end cover is arranged on one side of the base plate, which is far away from the insulating plate, and is detachably connected with the base.
In one possible embodiment, the base comprises a fixed plate and a column fixedly connected; one end of the cylinder, which is far away from the fixed plate, is penetrated through the insulating plate and the base plate; the buckle on the end cover is clamped in the clamping groove on the cylinder.
In one possible embodiment, the cover plate assembly further comprises a sealing ring; the sealing ring is arranged between the insulating plate and the base plate and sleeved on the cylinder.
In one possible implementation manner, a positioning groove is formed in one side, away from the substrate, of the insulating plate; the fixing plate is arranged in the positioning groove.
In one possible implementation manner, a limit groove is formed in one side, away from the substrate, of the insulating plate; one end of the pole far away from the substrate is arranged in the limit groove.
In a second aspect, the invention also provides a battery, which comprises a battery core and the cover plate assembly; the electrode lug on the battery cell is connected with the electrode post; and an electrolyte containing cavity in the battery cell is communicated with the liquid injection hole through the liquid injection protection grid.
Compared with the prior art, the invention has the beneficial effects that:
according to the cover plate assembly, the liquid injection holes are formed in the base plate, and the liquid injection protection grids corresponding to the liquid injection holes are arranged on the insulating plate connected with the base plate; after the pole is connected with the pole lug on the battery cell, an operator can use the liquid injection needle to inject liquid electrolyte into the liquid injection hole, and the liquid electrolyte flows into the battery cell through the gap on the liquid injection protection grid. The injection protection grille on the insulating plate can prevent the needle head of the injection needle from contacting with the battery cell so as to prevent the needle head of the injection needle from poking the battery cell when the injection needle injects liquid into the injection hole.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates an exploded view of a cover plate assembly in accordance with one embodiment of the present invention;
FIG. 2 is a schematic perspective view of a cover plate assembly according to an embodiment of the invention;
FIG. 3 is a schematic perspective view showing an insulating plate according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view showing another angle of an insulating plate according to an embodiment of the present invention;
FIG. 5 illustrates a partial internal schematic view of a cover plate assembly in accordance with an embodiment of the present invention.
Description of main reference numerals:
100-a cover plate assembly; 110-a substrate; 111-a liquid injection hole; 112-explosion-proof section; 113-mounting holes; 120-insulating plates; 121-a liquid injection protective grid; 122-insulating protective grids; 123-guard slots; 124-fixing holes; 125-positioning grooves; 126-limit grooves; 130-pole; 131-end caps; 1311-snap; 132-a base; 1321-fixing plate; 1322-column; 1323-card slot; 133-sealing ring;
x-a first direction; y-a second direction; z-third direction.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Example 1
Please refer to fig. 1 to 5; an embodiment of the present invention provides a cover plate assembly 100. The cover plate assembly 100 is used in a battery.
Referring to fig. 1, a height direction of the cover assembly 100 is defined as a first direction X; the length direction of the cover plate assembly 100 is a second direction Y; the width direction of the cover assembly 100 is the third direction Z.
The first direction X is perpendicular to the second direction Y, and the third direction Z is perpendicular to the first direction X and the second direction Y. It is to be understood that the above definitions are merely provided to facilitate understanding of the relative positional relationship of the various portions of the cover plate assembly 100 and are not to be construed as limiting the present invention.
Referring to fig. 1 and 2, the cover assembly 100 includes a base plate 110, an insulating plate 120, and a post 130; the substrate 110 is provided with a liquid injection hole 111; the insulating plate 120 is connected to the substrate 110; the insulating plate 120 is provided with a liquid injection protective grille 121, and the liquid injection protective grille 121 protrudes out of the outer surface of one side of the insulating plate 120, which is close to the substrate 110, and corresponds to the liquid injection hole 111; the pole 130 is disposed through the substrate 110 and the insulating plate 120.
The pole 130 is used for connecting with a tab on the battery cell. The insulating plate 120 can separate the substrate 110 and the battery cell to prevent the substrate 110 from contacting the battery cell. After the pole 130 is connected with the pole lug on the electric core, an operator can use a liquid injection needle to inject liquid electrolyte into the liquid injection hole 111, and the liquid electrolyte flows into the electric core through the gap on the liquid injection protective grille 121. The liquid injection protective grille 121 on the insulating plate 120 can prevent the needle head of the liquid injection needle from contacting with the battery cell, so as to prevent the needle head of the liquid injection needle from poking the battery cell when the liquid injection needle injects liquid into the liquid injection hole 111.
In some embodiments, referring to fig. 1 and 2, the cover assembly 100 includes two posts 130, the two posts 130 are respectively disposed through two ends of the substrate 110 along the second direction Y, and the two posts 130 are symmetrically disposed. The liquid injection hole 111 is disposed on the substrate 110 and located between the two poles 130.
The two poles 130 are respectively a positive pole and a negative pole; the two pole posts 130 are respectively connected with corresponding pole lugs on the battery core.
In some embodiments, referring to fig. 1 and 2, the substrate 110 is provided with an explosion-proof portion 112; the insulating plate 120 is provided with an insulating protection grid 122 corresponding to the explosion-proof part 112. When the battery cell generates high-pressure gas due to a short circuit or the like, the explosion-proof part 112 can be opened, and the high-pressure gas is discharged outwards through the slits on the insulation protection grating 122 and the explosion-proof part 112, so as to prevent the explosion of the battery.
The explosion-proof part 112 is an aluminum foil provided with a pre-scratch, for example.
In some embodiments, referring to fig. 1 and 3, the insulating plate 120 has a protection slot 123 thereon; one end of the protection groove 123 along the first direction X has an opening, and the opening corresponds to the explosion-proof portion 112 and the liquid injection hole 111; the insulation protection grille 122 is arranged on the inner wall of the protection groove 123 far away from one end of the opening along the first direction X; the liquid injection protection grating 121 is fixed on one side of the insulation protection grating 122 close to the substrate 110, and protrudes from the outer surface of the insulation protection grating 122 along the first direction X.
Preferably, the height of the liquid injection protection grating 121 along the first direction X is smaller than the depth of the protection groove 123 along the first direction X, so as to prevent the end of the liquid injection protection grating 121 away from the insulating protection grating 122 from interfering with the substrate 110.
Preferably, the liquid injection protection grille 121 and the insulation protection grille 122 are fixedly connected in an integrated manner.
In some embodiments, referring to fig. 3 and 4, the height of the end surface of the liquid injection protection grid 121 away from the end of the substrate 110 is flush with the height of the insulating protection grid 122 away from the side of the substrate 110, so that the liquid electrolyte in the liquid injection protection grid 121 flows into the battery cell.
In some embodiments, the explosion proof section 112 is disposed in a geometric center on the substrate 110; the liquid injection hole 111 is formed in the center of the substrate 110 along the second direction Y and is located at one side of the explosion-proof portion 112 along the third direction Z; the insulating protection grille 122 is disposed at the center of the insulating plate 120 along the second direction Y, and corresponds to the explosion-proof portion 112 and the liquid injection hole 111.
The geometric center of the substrate 110 refers to a junction of the center of the substrate 110 in the second direction Y and the center in the third direction Z.
Currently, an explosion-proof portion on a battery cover plate of the related art is generally disposed at the center of the cover plate, and a liquid injection hole is generally close to a positive electrode column or a negative electrode column. When the battery cell is a large-capacity battery cell with a larger size, the tab connecting sheet of the battery cell is easy to interfere with the liquid injection hole.
In the cover plate assembly 100 of the present invention, since the two polar posts 130 are symmetrically disposed at two sides of the substrate 110 along the second direction Y, and the liquid injection hole 111 is disposed at the center of the substrate 110 along the second direction Y, the distance between the liquid injection hole 111 and any polar post 130 is increased to the maximum extent, so as to solve the problem of interference between the liquid injection hole 111 and the polar ear connecting piece.
In some embodiments, referring to fig. 3 and 4, the liquid injection protection grating 121 is substantially cylindrical in shape. The part of the liquid injection protective grille 121 protruding out of the insulating protective grille 122 is provided with a plurality of gaps arranged around the circumferential direction of the liquid injection protective grille 121; the injection protection grille 121 is provided with a plurality of concentric slits at one end near the insulation protection grille 122. When the liquid electrolyte is injected into the liquid injection protective grille 121 by the liquid injection needle, the liquid electrolyte can flow into the electric core through the gap; the slit can prevent the needle of the injection needle from penetrating through the injection protection grating 121, so as to prevent the needle of the injection needle from poking the battery cell.
Preferably, the gap on the liquid injection protection grille 121 is not more than two thirds of the outer diameter of the needle head of the liquid injection needle, so as to prevent the needle head of the liquid injection needle from penetrating the gap on the liquid injection protection grille 121.
Preferably, the depth of the liquid injection protection grating 121 along the first direction X is not less than 5mm, and the inner diameter of the liquid injection protection grating 121 is not less than three times the inner diameter of the liquid injection hole 111, so as to prevent the liquid electrolyte from blocking in the liquid injection protection grating 121 when the liquid injection is too fast.
In the cover plate assembly 100 of the present invention, the liquid injection holes 111 are formed in the base plate 110, and the liquid injection protection grating 121 corresponding to the liquid injection holes 111 is provided on the insulating plate 120 connected to the base plate 110; after the pole 130 is connected with the pole lug on the electric core, an operator can use a liquid injection needle to inject the liquid electrolyte into the liquid injection hole 111, and the liquid electrolyte flows into the electrolyte containing cavity in the electric core through the gap on the liquid injection protection grid 121. The liquid injection protective grille 121 on the insulating plate 120 can prevent the needle head of the liquid injection needle from contacting with the battery cell, so as to prevent the needle head of the liquid injection needle from poking the battery cell when the liquid injection needle injects liquid into the liquid injection hole 111.
Example two
Referring to fig. 1 to 5, a cover assembly 100 according to the present embodiment is provided, and can be applied to a battery. The present embodiment is an improvement on the technical basis of the first embodiment described above, and is different from the first embodiment described above in that:
referring to fig. 1 and 5, the pole 130 includes an end cap 131 and a base 132; one end of the base 132 is disposed at one side of the insulating board 120 away from the substrate 110, and the other end is disposed through the insulating board 120 and the substrate 110; the end cap 131 is disposed on a side of the base plate 110 away from the insulating plate 120, and is detachably connected to the base 132.
In some embodiments, the base 132 includes a fixed plate 1321 and a post 1322 fixedly coupled; the fixed plate 1321 is disposed on a side of the insulating plate 120 away from the base plate 110; the end of the post 1322 away from the fixing plate 1321 is disposed through the insulating plate 120 and the base plate 110.
Further, the base plate 110 is provided with a mounting hole 113, and the insulating plate 120 is provided with a fixing hole 124 corresponding to the mounting hole 113; the end of the post 1322 away from the fixing plate 1321 is disposed through the mounting hole 113 and the fixing hole 124, and extends out of the mounting hole 113, so as to be connected to the end cap 131.
Illustratively, the end cap 131 is provided with a catch 1311; the post 1322 is provided with a slot 1323 corresponding to the clip 1311; the clip 1311 is clipped into the clip groove 1323, so that the end cap 131 is connected to the post 1322, and the base plate 110 is connected to the insulating plate 120.
In some embodiments, the cover plate assembly 100 further comprises a seal ring 133; the seal ring 133 is disposed between the insulating plate 120 and the base plate 110, and is sleeved on the post 1322. The seal ring 133 is used for sealing and connecting the insulating plate 120 and the substrate 110.
Referring to fig. 4 and 5, a positioning groove 125 is formed on a side of the insulating plate 120 away from the substrate 110; the shape of the fixing plate 1321 is matched with the shape of the positioning groove 125; the fixing plate 1321 is disposed in the positioning slot 125 to prevent the base 132 from being displaced during operation.
Illustratively, the fixed plate 1321 is a square plate, and the positioning groove 125 is a square groove.
In some embodiments, referring to fig. 4 and 5, a limiting groove 126 is disposed on a side of the insulating plate 120 away from the substrate 110; the fixed plate 1321 is disposed in the limiting slot 126.
It is noted that the fixed plate 1321 is disposed in the limiting slot 126 means that an end of the fixed plate 1321 away from the pole 130 does not protrude out of the limiting slot 126.
At present, when a battery cell is arranged in a shell of the battery, a tab at the top of the battery cell is easily contacted with the inner surface of the shell, and then the battery has the hidden trouble of short circuit.
The cover plate assembly 100 of the application is characterized in that the fixed plate 1321 is arranged in the limit groove 126, and after the fixed plate 1321 is connected with the battery cell tab, the inner wall of the limit groove 126 can prevent the tab from contacting with the inner wall of the battery shell, so that the occurrence of short-circuit accidents can be effectively avoided.
Example III
The invention also provides a battery, which comprises an electric core and the cover plate assembly 100; the lugs on the battery cell are connected with the pole 130; the electrolyte cavity in the cell is communicated with the liquid injection hole 111 through the liquid injection protection grid 121.
The battery provided in this embodiment has the cover plate assembly 100 provided in any of the above embodiments, so that all the beneficial effects of the cover plate assembly 100 provided in any of the above embodiments are not described herein.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (5)
1. A cover plate assembly, comprising:
a base plate provided with a liquid injection hole;
an insulating plate connected to the substrate; the liquid injection protection grating is arranged on the insulating plate, protrudes out of the outer surface of one side of the insulating plate, which is close to the substrate, and corresponds to the liquid injection hole;
the pole is penetrated through the base plate and the insulating plate;
the base plate is provided with an explosion-proof part; an insulating protection grid corresponding to the explosion-proof part is arranged on the insulating plate; the liquid injection protective grating is fixed on one side of the insulating protective grating, which is close to the substrate;
the insulation board is provided with a protection groove, one end of the protection groove along the first direction is provided with an opening, and the opening corresponds to the explosion-proof part and the liquid injection hole; the insulation protection grating is arranged on the inner wall of the protection groove along the first direction;
the liquid injection protective grating protrudes out of the outer surface of the insulating protective grating along the first direction;
the height of the liquid injection protective grating along the first direction is smaller than the depth of the protective groove along the first direction;
the height of the end face of the liquid injection protective grating, which is far away from one end of the substrate, is flush with the height of one side of the insulating protective grating, which is far away from the substrate;
the liquid injection protection grating protrudes out of the insulating protection grating, and a plurality of gaps are formed around the liquid injection protection grating in the circumferential direction; a plurality of concentric slits are arranged at one end of the liquid injection protective grille, which is close to the insulating protective grille; when the liquid injection needle injects liquid electrolyte into the liquid injection protective grating, the liquid electrolyte can flow into the battery cell through the gap; the gap can prevent the needle head of the liquid injection needle from penetrating through the liquid injection protection grating;
the gap on the liquid injection protective grille is not more than two thirds of the outer diameter of the needle head of the liquid injection needle;
the depth of the liquid injection protective grating along the first direction is not less than 5mm;
the inner diameter of the liquid injection protection grating is not smaller than three times of the inner diameter of the liquid injection hole;
the explosion-proof part is arranged in the geometric center of the substrate; the cover plate assembly comprises two polar posts which are symmetrically arranged on two sides of the explosion-proof part along a second direction; the liquid injection hole is formed in the center of the substrate along the second direction and is positioned at one side of the explosion-proof part along the third direction; the second direction is perpendicular to the first direction; the third direction is perpendicular to the first direction and the second direction;
the pole comprises an end cover and a base; one end of the base is arranged on one side of the insulating plate away from the substrate, and the other end of the base penetrates through the insulating plate and the substrate; the end cover is arranged on one side of the base plate far away from the insulating plate and is detachably connected with the base;
the base comprises a fixed plate and a column body which are fixedly connected; one end of the cylinder, which is far away from the fixed plate, is penetrated through the insulating plate and the base plate; the buckle on the end cover is clamped in the clamping groove on the cylinder.
2. The cover plate assembly of claim 1, further comprising a seal ring; the sealing ring is arranged between the insulating plate and the base plate and sleeved on the cylinder.
3. The cover plate assembly according to claim 1, wherein a positioning groove is formed in one side of the insulating plate away from the base plate; the fixing plate is arranged in the positioning groove.
4. The cover plate assembly according to claim 1, wherein a limiting groove is formed in one side of the insulating plate away from the base plate; one end of the pole far away from the substrate is arranged in the limit groove.
5. A battery comprising a cell and the cap assembly of any one of claims 1-4; the electrode lug on the battery cell is connected with the electrode post; and an electrolyte containing cavity in the battery cell is communicated with the liquid injection hole through the liquid injection protection grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410102766.4A CN117638339B (en) | 2024-01-25 | 2024-01-25 | Cover plate assembly and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410102766.4A CN117638339B (en) | 2024-01-25 | 2024-01-25 | Cover plate assembly and battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117638339A CN117638339A (en) | 2024-03-01 |
| CN117638339B true CN117638339B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410102766.4A Active CN117638339B (en) | 2024-01-25 | 2024-01-25 | Cover plate assembly and battery |
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| CN (1) | CN117638339B (en) |
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| CN218039481U (en) * | 2022-09-07 | 2022-12-13 | 北京卫蓝新能源科技有限公司 | Lithium battery cover plate |
| CN218070154U (en) * | 2022-06-18 | 2022-12-16 | 江西赣锋锂电科技股份有限公司 | Lithium ion battery liquid injection hole sealing structure |
| CN219106331U (en) * | 2022-12-15 | 2023-05-30 | 湖北亿纬动力有限公司 | Top cap subassembly and battery |
| CN219144452U (en) * | 2022-12-30 | 2023-06-06 | 格力钛新能源股份有限公司 | Double liquid injection hole plastic structure and battery pack with same |
| CN116487782A (en) * | 2023-06-16 | 2023-07-25 | 深圳海辰储能控制技术有限公司 | Lower plastic structure, energy storage device and electric equipment |
| CN219759909U (en) * | 2023-04-27 | 2023-09-26 | 深圳市言必果科技有限公司 | Battery tab cover plate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113394493A (en) * | 2021-06-25 | 2021-09-14 | 银隆新能源股份有限公司 | Lithium ion battery and electric vehicle with same |
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| KR100824849B1 (en) * | 2006-12-28 | 2008-04-23 | 삼성에스디아이 주식회사 | Lithium Secondary Battery and Manufacturing Method Thereof |
| CN213660511U (en) * | 2020-12-15 | 2021-07-09 | 合肥国轩高科动力能源有限公司 | A square shell lithium battery stopper |
| CN217589180U (en) * | 2022-05-12 | 2022-10-14 | 武汉楚能新能源有限公司 | Power battery top cover and power battery |
| CN218070154U (en) * | 2022-06-18 | 2022-12-16 | 江西赣锋锂电科技股份有限公司 | Lithium ion battery liquid injection hole sealing structure |
| CN218039481U (en) * | 2022-09-07 | 2022-12-13 | 北京卫蓝新能源科技有限公司 | Lithium battery cover plate |
| CN219106331U (en) * | 2022-12-15 | 2023-05-30 | 湖北亿纬动力有限公司 | Top cap subassembly and battery |
| CN219144452U (en) * | 2022-12-30 | 2023-06-06 | 格力钛新能源股份有限公司 | Double liquid injection hole plastic structure and battery pack with same |
| CN219759909U (en) * | 2023-04-27 | 2023-09-26 | 深圳市言必果科技有限公司 | Battery tab cover plate |
| CN116487782A (en) * | 2023-06-16 | 2023-07-25 | 深圳海辰储能控制技术有限公司 | Lower plastic structure, energy storage device and electric equipment |
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| CN117638339A (en) | 2024-03-01 |
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