CN116454547B - Partition component, top cover assembly, battery and battery module - Google Patents
Partition component, top cover assembly, battery and battery module Download PDFInfo
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- CN116454547B CN116454547B CN202310718990.1A CN202310718990A CN116454547B CN 116454547 B CN116454547 B CN 116454547B CN 202310718990 A CN202310718990 A CN 202310718990A CN 116454547 B CN116454547 B CN 116454547B
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- injection hole
- side wall
- liquid injection
- electrode assembly
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- 238000005192 partition Methods 0.000 title claims description 41
- 238000002347 injection Methods 0.000 claims abstract description 98
- 239000007924 injection Substances 0.000 claims abstract description 98
- 239000007788 liquid Substances 0.000 claims abstract description 96
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 230000001154 acute effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 abstract description 178
- 230000008595 infiltration Effects 0.000 abstract description 7
- 238000001764 infiltration Methods 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 21
- 238000009826 distribution Methods 0.000 description 10
- 238000009792 diffusion process Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/60—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)
- Filling, Topping-Up Batteries (AREA)
Abstract
The application discloses a separation part, a top cover assembly, a battery and a battery module, wherein the separation part comprises a part body and a flow dividing structure, the part body is provided with a first surface and a second surface which are opposite, a first liquid injection hole is formed in the part body, and the first liquid injection hole penetrates through the first surface and the second surface; the shunt structure comprises a shunt piece and a connecting piece, wherein the shunt piece is positioned below the direction of the first liquid injection hole pointing to the second surface on the first surface, the shunt piece comprises a side wall and a bottom wall, one end of the side wall is connected with the peripheral edge of the bottom wall, the other end of the side wall extends along the direction of the second surface pointing to the first surface and is converged to form an endpoint, the side wall is used for shunting electrolyte which passes through the first liquid injection hole from the direction of the first surface pointing to the second surface and is dispersed to the periphery, one end of the connecting piece is connected with the second surface, and the other end of the connecting piece is connected with the side wall. The application improves the uniformity of the electrolyte for infiltrating the electrode assembly, shortens the time for the electrolyte to infiltrate the electrode assembly, and improves the infiltration efficiency of the electrolyte.
Description
Technical Field
The application relates to the field of batteries, in particular to a separation component, a top cover assembly, a battery and a battery module.
Background
The top cap subassembly includes a plurality of parts such as top cap piece, partition member, and wherein, partition member installs on the top cap piece, all is provided with the notes liquid hole on top cap piece and partition member, and annotates liquid hole eccentric settings, for example, in the cylinder battery, the installation position of utmost point post sets up in the geometric center of top cap piece and partition member, annotates the installation position setting that the liquid hole is close to the utmost point post, in the rectangle battery, the installation position setting of explosion-proof valve is in the geometric center of top cap piece and partition member, in the length direction of top cap piece, annotate the arbitrary one side of the installation position of liquid hole position of explosion-proof valve.
Because the eccentric arrangement of annotating the liquid hole, consequently, when annotating the electrolyte to annotating the liquid hole along the directional direction of dividing part of top cap piece, the electrolyte through annotating the liquid hole is at first soaked and is close to the electrode assembly of annotating the liquid hole, then slowly soaks the electrode assembly of keeping away from annotating the liquid hole, and it is relatively poor to see that the electrolyte soaks the uniformity of electrode assembly, and has prolonged the time that the electrolyte soaks the electrode assembly, has reduced the infiltration efficiency of electrolyte.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a separation part, a top cover assembly, a battery and a battery module, which can improve the uniformity of electrolyte infiltration to the electrode assembly and shorten the time for the electrolyte to infiltrate the electrode assembly, thereby improving the electrolyte infiltration efficiency.
In order to solve the above technical problem, the present invention provides, in a first aspect, a partition member comprising:
the component comprises a component body, a first liquid injection hole and a second liquid injection hole, wherein the component body is provided with a first surface and a second surface which are opposite, the first liquid injection hole penetrates through the first surface and the second surface, and the first liquid injection hole is arranged away from the geometric center of the component body;
the flow distribution structure comprises a flow distribution part and a connecting piece, wherein the flow distribution part is positioned below the direction of the first surface, which points to the second surface, the flow distribution part comprises a side wall and a bottom wall, one end of the side wall is connected with the peripheral edge of the bottom wall, the other end of the side wall extends along the direction of the second surface, which points to the first surface, and is converged to form an end point, the length of the side wall, which is close to the geometric center of the part body, is larger than the length of the side wall, which is far away from the geometric center of the part body, along the direction of the first surface, which points to the second surface, is used for distributing electrolyte passing through the first flow distribution hole from the direction of the first surface, and is dispersed to the periphery, and one end of the connecting piece is connected with the second surface, and the other end of the connecting piece is connected with the side wall.
In the application, the flow dividing piece is positioned below the direction of the first liquid injection hole pointing to the second surface, one end of the side wall is connected with the peripheral edge of the bottom wall, and the other end of the side wall extends along the direction of the second surface pointing to the first surface and is converged to form an endpoint, so that after the electrolyte passes through the first liquid injection hole from the first surface to the second surface, the side wall of the flow dividing piece is divided and guided to the periphery, so that the electrolyte drops to all positions of the electrode assembly, thereby enlarging the sputtering range of the electrolyte facing to the electrode assembly, improving the uniformity of the electrolyte infiltrating electrode assembly, shortening the time of the electrolyte infiltrating electrode assembly and improving the efficiency of the electrolyte infiltrating electrode assembly.
And, because the first notes liquid hole skew part body's geometric center sets up, and along the direction of first surface orientation second surface, the length of the lateral wall that is close to part body's geometric center is greater than the length of the lateral wall that keeps away from part body's geometric center, consequently, the reposition of redundant personnel piece can be shunted more electrolyte towards the direction that is close to part body's geometric center, shunts less electrolyte towards the direction that keeps away from part body's geometric center to make electrolyte evenly dispersed in electrode assembly's upper surface, and then improved electrolyte infiltration electrode assembly's homogeneity.
In addition, through the one end of the lateral wall of reposition of redundant personnel spare and the direction that the second surface was directed to the first surface extend and assemble the formation extreme point all around edge connection, the other end, on the one hand, compare in the reposition of redundant personnel spare of columnar structure, can disperse water conservancy diversion with electrolyte and even drip to electrode assembly's each position, improved the effect that improves electrolyte reposition of redundant personnel and water conservancy diversion, simultaneously because the one end that the lateral wall kept away from the diapire extends along the direction that the second surface was directed to the first surface and assemble the formation extreme point, consequently, the resistance when the reposition of redundant personnel spare shunts electrolyte has been reduced, on the other hand, compare in the reposition of redundant personnel spare of platy structure, can improve the water conservancy diversion speed of electrolyte and avoid the electrolyte to appear splashing the condition emergence on the reposition of redundant personnel spare, thereby increased the electrolyte in the electrolyte unit time annotate liquid volume, and then improved the annotate liquid efficiency of electrolyte.
In addition, because the material of the gluey nail in the battery is rubber or plastic generally, consequently, in the longer use of gluey nail, gluey nail is ageing easily, thereby lead to gluey nail to the sealing performance decline of first notes liquid hole, that is, the stability of being connected between gluey nail and the first notes liquid hole receives the influence, thereby, when the battery striking or fall the condition, electrode assembly will be extrudeed towards gluey nail, so that ageing gluey nail extrusion passes through sealing welding's lamina tecti, thereby lead to the lamina tecti to appear cracking, and then lead to the electrolyte to appear leaking the condition emergence, based on this, through setting up the water conservancy diversion piece, can prevent electrode assembly and gluey nail direct extrusion, thereby avoid leading to the condition emergence that the electrolyte was revealed because of gluey nail extrusion lamina tecti.
In a possible implementation manner of the first aspect, the side wall is a conical-like side wall.
Because the simulated conical side wall is a curved surface, compared with the pyramid side wall, the simulated conical side wall can uniformly guide the electrolyte, so that the flow distribution and guide effects of the flow distribution piece on the electrolyte are further improved, and the uniformity of the electrolyte infiltrating electrode assembly is improved. In addition, through setting up imitative toper lateral wall, can be when first annotating the eccentric setting of liquid hole for the lateral wall that the longer side of section corresponds extends towards the more one side of electrode assembly's area, thereby makes the shunt spare can be to the more electrolyte of electrode assembly area's position water conservancy diversion, has further improved the homogeneity of electrolyte infiltration electrode assembly.
In a possible implementation manner of the first aspect, an included angle between two sides of a cross section of the side wall and a direction of the first surface pointing to the second surface is an acute angle, and the cross section passes through the endpoint.
Therefore, the coverage area of the electrolyte dropping onto the electrode assembly can be increased, so that the uniformity of the electrolyte infiltrating the electrode assembly is improved, the flowing speed of the electrolyte on the side wall can be improved, and the electrolyte injection efficiency is improved.
In a possible implementation manner of the first aspect, an angle between two sides in a cross section of the flow dividing member and a direction of the first surface pointing to the second surface is a, and a is 45 degrees less than or equal to 60 degrees.
If the included angle between the two sides of the cross section of the shunt and the direction of the first surface pointing to the second surface is smaller than 45 degrees, the inclination angle of the side wall is too small, and although the flow speed of the electrolyte on the side wall can be ensured, the coverage area of the electrolyte on the electrode assembly after the side wall is guided is small, so that the uniformity of the electrolyte infiltrating the electrode assembly is affected, if the included angle between the two sides of the cross section of the shunt and the direction of the first surface pointing to the second surface is smaller than 60 degrees, the inclination angle of the side wall is too large, and although the coverage area of the electrolyte on the electrode assembly is ensured, the flow speed of the electrolyte on the side wall is slow, so that the injection efficiency of the electrolyte is affected. Therefore, when a is more than or equal to 45 degrees and less than or equal to 60 degrees, the coverage area of the electrolyte after the side wall diversion drops onto the electrode assembly can be ensured, and the flowing speed of the electrolyte on the side wall can be ensured, so that the liquid injection effect of the electrolyte is ensured.
In a possible implementation manner of the first aspect, an included angle between a side edge of the cross section, which is close to the geometric center of the component body, and a direction of the first surface pointing to the second surface is a1, and an included angle between a side edge of the cross section, which is far from the geometric center of the component body, and a direction of the first surface pointing to the second surface is a2, where a1 > a2.
Therefore, more electrolyte can be guided to the electrode assembly positioned on the side of the first liquid injection hole facing the geometric center of the component body through the side wall of the flow dividing piece, so that the coverage area of the part of electrode assembly is increased, meanwhile, less electrolyte can be guided to the electrode assembly positioned on the side of the first liquid injection hole far away from the geometric center of the component body through the side wall of the flow dividing piece, more electrolyte can be guided to one side of the electrode assembly needing more electrolyte, less electrolyte can be guided to one side of the electrode assembly needing less electrolyte, and the uniformity of the electrolyte infiltrating electrode assembly is improved.
In a possible implementation manner of the first aspect, a distance between the end point and the first liquid injection hole is d, and d is 1mm less than or equal to 2.5mm.
Therefore, when the distance between the end point and the first liquid injection hole is between 1mm and 2.5mm, the electrolyte can smoothly drop from the first liquid injection hole, and the electrolyte flowing to the second surface can be reduced, so that the shunting effect of the side wall of the shunting piece on the electrolyte is improved.
In a possible implementation manner of the first aspect, the end point is offset from a central axis of the first injection hole and is far from a geometric center of the component body.
Therefore, more electrolyte can be guided to one side of the first liquid injection hole, which faces the geometric center of the component body, so that the uniformity of the electrolyte infiltrating the electrode assembly is further improved.
In a possible implementation manner of the first aspect, the connecting piece includes a plurality of connecting rods, a plurality of connecting rods are arranged around the first liquid injection hole at intervals, and the lengths of the plurality of connecting rods are the same.
Through a plurality of connecting rods around first notes liquid hole interval setting, can improve the joint strength between reposition of redundant personnel spare and the part body, on the one hand, improved the reposition of redundant personnel spare and the stability of water conservancy diversion to the reposition of redundant personnel and the electrolyte of drip, on the other hand, can make the reposition of redundant personnel spare install under first notes liquid hole to the reposition of redundant personnel effect of reposition of redundant personnel spare has been improved.
In a possible implementation manner of the first aspect, the connecting rod is integrally formed with the component body, or the connecting rod is welded to the component body, or the connecting rod is clamped to the component body.
When connecting rod and part body integrated into one piece, the tip and the second surface integrated into one piece of the one end that connecting rod and second surface are connected, from this, can reduce the assembled part between connecting rod and the part body to simplified the technology of reposition of redundant personnel equipment.
When the connecting rod is welded to the component body, the end portion of the end, connected to the second surface, of the connecting rod is welded to the second surface, and therefore, the connecting structure can be prevented from being arranged between the connecting rod and the second surface, and the connecting structure between the connecting rod and the second surface is simplified.
When the connecting rod joint in the part body, the tip joint of the one end that connecting rod and second surface are connected, from this, when the reposition of redundant personnel damage, need not to change whole partition member, only need change the reposition of redundant personnel can to partition member's cost of maintenance has been reduced.
In a possible implementation manner of the first aspect, when the connecting rod is clamped to the component body, a clamping protrusion is arranged at one end of the connecting rod connected with the component body, and a clamping hole is arranged on the second surface; or alternatively, the first and second heat exchangers may be,
a clamping hole is formed in one end, connected with the part body, of the connecting rod, and a clamping protrusion is arranged on the second surface;
the clamping protrusion is in interference fit in the clamping hole.
Because the connecting rod is rigid structure, consequently, set up the bellied joint intensity of joint can be guaranteed to the joint on the connecting rod, from this, when bellied and the joint hole interference fit of joint, can make part body and connecting rod joint fixed.
In a possible implementation manner of the first aspect, the connecting rod includes a first guide surface and a second guide surface that intersect, and an edge formed by the intersection of the first guide surface and the second guide surface faces the end point.
From this, when electrolyte on the lateral wall and flow direction connecting rod, the edge can carry out the secondary reposition of redundant personnel to electrolyte, and first guide surface and second guide surface can carry out the secondary water conservancy diversion to electrolyte to make electrolyte can drop fast to electrode assembly on, improved the efficiency that electrolyte soaks electrode assembly.
In addition, the edge formed by intersecting the first guide surface and the second guide surface faces the end point, so that the contact resistance of the connecting rod to the electrolyte diversion can be reduced, and the effect of the connecting rod on the electrolyte diversion is improved.
In a possible implementation manner of the first aspect, an angle between the first guide surface (12212) and the second guide surface (12213) is α, and α is 60 ° or less and 120 °.
The too large included angle between the first guide surface and the second guide surface can influence the flow guiding speed of the electrolyte, and the too small included angle between the first guide surface and the second guide surface can influence the diffusion area of the electrolyte, so that the guide effect and the flow guiding speed of the first guide surface and the second guide surface can be ensured by enabling the angle alpha to be smaller than or equal to 60 degrees and smaller than or equal to 120 degrees, and meanwhile, the diffusion area of the electrolyte is ensured.
In a possible implementation manner of the first aspect, the first guiding surface and the second guiding surface are both cambered surfaces.
The cambered surface can be smoothly transited, so that the situation of plane splashing can be avoided, and the flow distribution and diversion effects of the connecting rod on electrolyte are further improved.
In a possible implementation manner of the first aspect, the second surface is provided with a boss, a geometric center line of the boss is coaxial with a central axis of the first liquid injection hole, the first liquid injection hole penetrates through the boss, and the connecting piece is connected with the boss to achieve connection with the second surface.
Through set up the boss on the second surface, and the connecting piece passes through the boss to be connected in the second surface, can improve the joint strength around the first notes liquid hole to improved the connection stability between connecting piece and the part body.
In a second aspect, the present invention also provides a top cap assembly comprising:
the top cover plate is provided with a second liquid injection hole penetrating through the top cover plate;
the partition member according to the first aspect, wherein the partition member is provided in a stacked manner on the top cover plate, and the first liquid injection hole and the second liquid injection hole in the partition member are coaxial and communicate with each other.
Since the first liquid injection hole and the second liquid injection hole are coaxial and communicate, the liquid injection effect of the top cap assembly is improved, and in addition, since the top cap assembly is applied to the partition member in the first aspect, the uniformity of the electrolyte wetting the electrode assembly is improved.
In a third aspect, the present invention also provides a battery comprising:
a housing including a receiving cavity having an opening;
an electrode assembly mounted in the receiving chamber;
the cap assembly of the second aspect, wherein the cap assembly covers the opening.
Since the battery employs the top cap assembly of the second aspect, the production efficiency of the battery is improved.
In a possible implementation manner of the third aspect, a liquid passing gap is provided between the bottom wall of the flow divider in the partition member in the top cover assembly and the electrode assembly.
Therefore, through the liquid passing gap between the bottom wall of the flow dividing piece and the electrode assembly, electrolyte can be conveniently moved in the process of injecting the electrolyte, and the electrolyte injection efficiency is further improved.
In a possible implementation manner of the third aspect, the width of the liquid passing gap is D, and D is 1mm less than or equal to 2mm.
Due to the tension effect of the liquid surface, a part of electrolyte can flow to the lower part along the side wall surface and the bottom wall surface of the shunt, when the liquid passing gap is too small, the shunt can be extruded upwards, so that the stability and strength of the structure of the shunt are affected, the electrolyte diffusion speed below the shunt is small due to the too small liquid passing gap, the electrolyte injection uniformity is reduced, the energy density of the cell can be affected when the liquid passing gap is too large, and based on the electrolyte diffusion speed, the width of the liquid passing gap is between 1mm and 2mm, the electrolyte diffusion speed below the shunt can be ensured, the uniformity of the electrolyte infiltrating electrode assembly can be ensured, and the energy density of the cell can be ensured.
In a fourth aspect, the present invention also provides a battery module, including at least one battery according to the third aspect.
Since the battery module employs the battery of the third aspect, the production efficiency of the battery module is improved.
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, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a partition member according to an embodiment of the present invention;
FIG. 2 is a schematic view of a view angle of a shunt structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of a shunt structure according to another embodiment of the present invention;
FIG. 4 is a top view of a shunt structure according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;
FIG. 6 is a cross-sectional view taken at B-B of FIG. 4;
FIG. 7 is a partial cross-sectional view of a partition member provided in an embodiment of the present invention;
fig. 8 is a schematic structural view of a connecting rod provided with a clamping protrusion according to an embodiment of the present invention;
FIG. 9 is a schematic structural view of a component body according to an embodiment of the present invention;
FIG. 10 is an enlarged partial schematic view of FIG. 9C;
fig. 11 is a schematic structural view of a top cap assembly according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a battery according to an embodiment of the present invention;
FIG. 12A is a partial cross-sectional view of a battery provided in an embodiment of the present invention;
fig. 13 is a schematic structural view of a battery module according to an embodiment of the present invention.
Reference numerals illustrate:
100-partition members; 110-part body; 111-a first surface; 112-a second surface; 1121-a clamping hole; 1122-boss; 113-a first liquid injection hole; 120-shunt structure; 121-a shunt; 1211-sidewalls; 1212-a bottom wall; 1213-end point; 122-connecting piece; 1221-connecting rods; 12211-snap-fit protrusions; 12212-a first guide surface; 12213-a second guide surface; 12214-edges;
200-a top cover assembly; 210-top cover plate; 211-a second liquid injection hole;
300-cell; 310-a housing; 311-opening; 320-electrode assembly;
400-battery module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. 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.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
As described in the background art of the present application, in the related art, because the electrolyte injection hole is eccentrically provided, when electrolyte is injected into the electrolyte injection hole in a direction in which the top cover sheet is directed to the partition member, the electrolyte passing through the electrolyte injection hole first infiltrates the electrode assembly close to the electrolyte injection hole and then slowly infiltrates the electrode assembly far from the electrolyte injection hole, so that it is apparent that the time for the electrolyte to infiltrate the electrode assembly is prolonged and the infiltration efficiency of the electrolyte is reduced.
In order to solve the technical problems mentioned in the background art, the application provides a separation part, a top cover assembly, a battery and a battery module, wherein a flow dividing part in the separation part is connected to a second surface through a connecting part, and is positioned below a first liquid injection hole in the direction of the first surface pointing to the second surface.
The application is illustrated in detail below by means of specific examples:
referring to fig. 1 and 2, an embodiment of the present application provides a partition member 100, where the partition member 100 includes a member body 110 and a flow dividing structure 120, and the member body 110 has a first surface 111 and a second surface 112 opposite to each other, a first liquid injection hole 113 is disposed on the member body 110, the first liquid injection hole 113 penetrates the first surface 111 and the second surface 112, and the first liquid injection hole 113 is disposed offset from the geometric center of the member body 110; the flow dividing structure 120 includes a flow dividing member 121 and a connecting member 122, the flow dividing member 121 is located below the first liquid injecting hole 113 in a direction in which the first surface 111 points to the second surface 112 (i.e., in a direction indicated by an arrow X1 in fig. 1, the directions in which the first surface 111 points to the second surface 112 are all indicated by an arrow X1 hereinafter), the flow dividing member 121 includes a side wall 1211 and a bottom wall 1212, one end of the side wall 1211 is connected to the peripheral edge of the bottom wall 1212, the other end of the side wall 1211 is connected to the second surface 112 in a direction in which the second surface 112 points to the first surface 111 (i.e., in a direction indicated by an arrow X2 in fig. 1, the directions in which the first surface 111 points to the second surface 112 are all indicated by an arrow X2 hereinafter) and is converged to form an end point 1213, and a length of the side wall 1211 near the geometric center of the component body 110 is longer than a length of the side wall far from the geometric center of the component body 110, the side wall 1211 is used to divide the electrolyte flowing from the first surface 111 to the second surface 112 through the first liquid injecting hole 113 and disperse the electrolyte flowing to the first surface 112 toward the peripheral edge, and connect to the other end of the side wall 1211 to the second surface 122.
Among them, the part body 110 is an insulating plate, and the first surface 111 and the second surface 112 are two surfaces of the part body 110 opposite in the thickness direction.
The above-mentioned flow dividing member 121 may be located directly or obliquely below the first pouring hole 113 in the direction in which the first surface 111 is directed to the second surface 112, as long as the flow dividing member 121 can divide the electrolyte that has dropped from the first surface 111 to the second surface 112 through the first pouring hole 113. The side wall 1211 has one end connected to the peripheral edge of the bottom wall 1212, and the other end extending along the direction of the second surface 112 pointing toward the first surface 111 and converging to form the end point 1213, and it should be understood that the split member 121 formed by enclosing the side wall 1211 and the bottom wall 1212 may be a cone, a pyramid, a cone-like body (two sides of at least one cross section passing through the end point 1213 are different), a pyramid-like body (at least two edges 12214 are different in length), or the like.
Thus, in this embodiment, since the shunt member 121 is located below the direction in which the first surface 111 points to the second surface 112 and one end of the side wall 1211 is connected to the peripheral edge of the bottom wall 1212 and the other end extends along the direction in which the second surface 112 points to the first surface 111 and converges to form the end point 1213, when the electrolyte passes through the first fluid injection hole 113 from the first surface 111 to the second surface 112, the side wall 1211 of the shunt member 121 is shunted and guided to the periphery, so that the electrolyte drops to each position of the electrode assembly, thereby expanding the sputtering range of the electrolyte towards the electrode assembly, improving the uniformity of the electrolyte infiltrating into the electrode assembly, and simultaneously shortening the time of the electrolyte infiltrating into the electrode assembly and improving the efficiency of the electrolyte infiltrating into the electrode assembly.
Moreover, since the first liquid injection hole 113 is disposed away from the geometric center of the component body 110 and is directed in the direction of the second surface 112 along the first surface 111, the length of the sidewall close to the geometric center of the component body 110 is greater than the length of the sidewall far away from the geometric center of the component body 110, and therefore, the flow divider 121 can divide more electrolyte toward the direction close to the geometric center of the component body 110 and divide less electrolyte toward the direction far away from the geometric center of the component body 110, so that the electrolyte is uniformly dispersed on the upper surface of the electrode assembly, and uniformity of the electrolyte-infiltrating electrode assembly is improved.
In addition, one end of the side wall 1211 of the shunt 121 is connected to the peripheral edge of the bottom wall 1212, and the other end extends along the direction of the second surface 112 toward the first surface 111 and converges to form the end point 1213, on one hand, compared with the shunt 121 with a columnar structure, the electrolyte can be dispersed and guided and uniformly dropped to each position of the electrode assembly, so that the effect of improving the electrolyte diversion and guiding is improved, and meanwhile, since the end of the side wall 1211 of the shunt 121, which is far away from the bottom wall 1212, extends along the direction of the second surface 112 toward the first surface 111 and converges to form the end point 1213, the resistance of the shunt 121 in shunting the electrolyte is reduced, on the other hand, compared with the shunt 121 with a plate structure, the diversion speed of the electrolyte can be improved, and the situation that the electrolyte splashes on the shunt 121 are avoided, so that the liquid injection amount in unit time of the electrolyte is increased, and the liquid injection efficiency of the electrolyte is improved.
And, because the material of the nail in the secondary cell is rubber or plastic usually, consequently, in the long-time use of nail, the nail is ageing easily, thereby lead to the sealing performance decline of nail to first notes liquid hole, that is, the stability of being connected between nail and the first notes liquid hole is influenced, thereby, when the secondary cell striking or fall down the condition, electrode assembly will be extrudeed towards the nail, so that ageing nail extrusion passes through seal welded lamina tecti, thereby lead to the lamina tecti to appear cracking, and then lead to the electrolyte to appear leaking the condition emergence, based on this, through setting up shunt structures 120, can prevent electrode assembly and direct extrusion of nail, thereby avoid leading to the condition emergence that the electrolyte was revealed because of the lamina tecti extrusion lamina tecti.
In some possible embodiments, referring to fig. 3, the side wall 1211 is a pseudo-tapered side wall 1211.
The above-mentioned simulated taper is similar to a taper, but at least one of the simulated taper is different in both sides of the cross section passing through the end point 1213.
Because the tapered-like side wall 1211 is curved, the tapered-like side wall 1211 is capable of uniformly guiding the electrolyte compared to the pyramid side wall 1211, thereby further improving the flow-dividing and guiding effects of the flow-dividing member 121 on the electrolyte and improving the uniformity of the electrolyte infiltrating into the electrode assembly. In addition, by arranging the conical-like side wall 1211, when the first liquid injection hole 113 is eccentrically arranged, the side wall 1211 corresponding to the side edge with the longer side edge of the cross section extends towards the side with more area of the electrode assembly, so that the split piece 121 can guide more electrolyte to the position with more area of the electrode assembly, and the uniformity of the electrolyte infiltrating the electrode assembly is further improved.
In some possible embodiments, referring to fig. 5, the angle between the two sides of the cross-section of the side wall 1211 and the direction of the first surface 111 toward the second surface 112 is acute, and the cross-section passes through the end point 1213.
Wherein, the acute angle is an included angle of 0-90 degrees. The number of cross sections passing through the end point 1213 is plural, and the cross section in this embodiment is any cross section passing through the end point 1213.
If the included angle between the two sides of the cross section of the side wall 1211 and the direction of the first surface 111 pointing to the second surface 112 is a right angle, it means that the side wall 1211 is not expanded outwards, so that the coverage area of the electrolyte drop onto the electrode assembly after the diversion of the diversion element 121 is smaller, and thus the uniformity of the electrolyte infiltrating the electrode assembly is affected, if the included angle between the two sides of the cross section of the side wall 1211 and the direction of the first surface 111 pointing to the second surface 112 is an obtuse angle, it means that the expansion range of the side wall 1211 is larger, and the side wall 1211 is softer, so that when the side wall 1211 directs the electrolyte, the flow speed of the electrolyte on the side wall 1211 is slower, and thus the electrolyte injection efficiency is affected, and based on this, the included angle between the two sides of the cross section of the side wall 1211 and the direction of the first surface 111 pointing to the second surface 112 is an acute angle, thus not only the coverage area of the electrolyte drop onto the electrode assembly is increased, and thus the uniformity of the electrolyte electrode assembly is improved, but also the flow of the electrolyte on the side wall 1211 is improved, and the electrolyte impregnating efficiency is improved.
Further, in some possible embodiments, referring to FIG. 5, the angle between the two sides of the diverter 121 in the cross-section and the direction of the first surface 111 toward the second surface 112 is a, 45A 60.
If the included angle between the two sides of the cross section of the shunt 121 and the direction of the first surface 111 pointing to the second surface 112 is smaller than 45 °, the inclination angle of the side wall 1211 is too small, and although the flow speed of the electrolyte on the side wall 1211 can be ensured, the coverage area of the electrolyte on the electrode assembly after the flow guiding of the side wall 1211 is small, so that the uniformity of the electrolyte infiltrating the electrode assembly is affected, and if the included angle between the two sides of the cross section of the shunt 121 and the direction of the first surface 111 pointing to the second surface 112 is smaller than 60 °, the inclination angle of the side wall 1211 is too large, although the coverage area of the electrolyte on the electrode assembly due to the flow guiding of the side wall 1211 is ensured, the flow speed of the electrolyte on the side wall 1211 is slow, so that the injection efficiency of the electrolyte is affected. Thus, when a is 45 DEG or more and 60 DEG or less, not only can the coverage area of the electrolyte after the flow guiding of the side wall 1211 be ensured to be dropped onto the electrode assembly, but also the flow speed of the electrolyte on the side wall 1211 can be ensured, thereby ensuring the liquid injection effect of the electrolyte.
Illustratively, a is 45 °, 47 °, 49 °, 51 °, 53 °, 55 °, 57 °, 59 °, 60 °, and the like.
In some possible embodiments, referring to fig. 6, the angle between the side near the geometric center of the component body 110 and the direction in which the first surface 111 points toward the second surface 112 in the cross-section is a1, and the angle between the side far from the geometric center of the component body 110 and the direction in which the first surface 111 points toward the second surface 112 is a2, a1 > a2.
Since the first injection hole 113 is eccentrically disposed, when the electrode assembly is injected through the first injection hole 113, the area of the electrode assembly located at the side of the first injection hole 113 facing the geometric center of the component body 110 is large, and thus, more electrolyte is required, and based on this, in this embodiment, a1 > a2 is made, and thus, more electrolyte can be guided through the side wall 1211 of the shunt 121 to the electrode assembly located at the side of the first injection hole 113 facing the geometric center of the component body 110, thereby increasing the coverage area of the portion of the electrode assembly, and at the same time, the side wall 1211 of the shunt 121 can also guide less electrolyte to the electrode assembly located at the side of the first injection hole 113 facing away from the geometric center of the component body 110, and therefore, more electrolyte can be guided to the side of the electrode assembly requiring less electrolyte, and less electrolyte can be guided to the side of the electrode assembly requiring less electrolyte, thereby improving the uniformity of the electrolyte-infiltrated electrode assembly.
In some possible embodiments, referring to FIG. 7, the distance between the end point 1213 and the first injection hole 113 is d,1 mm.ltoreq.d.ltoreq.2.5 mm.
Wherein, the distance between the end point 1213 and the first injection hole 113 refers to the distance between the end point 1213 and the end of the first injection hole 113 facing the end of the flow dividing structure 120 in the direction that the first surface 111 points to the second surface 112, and the distance between the end point 1213 and the second surface 112 in the direction that the first surface 111 points to the second surface 112.
Specifically, if the distance between the end point 1213 and the first injection hole 113 is smaller than 1mm, since the side wall 1211 of the shunt 121 is closer to the first injection hole 113, the path space for the electrolyte to drop from the first injection hole 113 onto the side wall 1211 of the shunt 121 is shorter, so that the phenomenon of reverse bubbling of the electrolyte easily occurs, and further, smooth dropping of the electrolyte is prevented, and if the distance between the end point 1213 and the first injection hole 113 is greater than 2.5mm, since the electrolyte has a certain viscosity, part of the electrolyte passing through the first injection hole 113 flows on the second surface 112 under the influence of the surface tension, and if the distance between the side wall 1211 of the shunt 121 and the first injection hole 113 is larger, the path space for the electrolyte to drop from the first injection hole 113 is larger, so that most of the electrolyte flows on the second surface 112, and the shunting effect of the side wall 1211 of the shunt 121 on the electrolyte is reduced.
Thus, when the distance between the end point 1213 and the first injection hole 113 is between 1mm and 2.5mm, the electrolyte can smoothly drop from the first injection hole 113, and the electrolyte flowing to the second surface 112 can be reduced, so that the flow distribution effect of the side wall 1211 of the flow distribution member 121 on the electrolyte is improved.
In some possible embodiments, referring to fig. 3, the end point 1213 is on the central axis of the first injection port 113 and is remote from the geometric center of the component body 110.
Since most of the projection surface of the first injection hole 113 projected on the shunt 121 falls on the inclined surface of the right shunt 121, more electrolyte can be guided to one side of the first injection hole 113 toward the geometric center of the component body 110 by making the end point 1213 on the central axis of the first injection hole 113 and away from the geometric center of the component body 110, thereby further improving the uniformity of the electrolyte-infiltrating electrode assembly.
In some possible embodiments, referring to fig. 8 and 9, the connecting member 122 includes a plurality of connecting rods 1221, the plurality of connecting rods 1221 being spaced around the first fill hole 113, and the plurality of connecting rods 1221 being the same length.
Wherein the plurality of tie rods 1221 refers to two or more numbers of tie rods 1221, e.g., three or four tie rods 1221.
In this embodiment, the plurality of connecting rods 1221 are disposed around the first liquid injection hole 113 at intervals, so that the connection strength between the flow dividing member 121 and the component body 110 can be improved, on one hand, the stability of the flow dividing member 121 for dividing and guiding the dropped electrolyte is improved, and on the other hand, the flow dividing member 121 can be arranged under the first liquid injection hole 113, so that the flow dividing effect of the flow dividing member 121 is improved.
In addition, since the plurality of connecting rods 1221 are identical in length, the bottom wall 1212 and the end face of the electrode assembly can be made parallel, thereby improving the liquid passing effect between the bottom wall 1212 and the electrode assembly.
In some other possible embodiments, the shunt 121 may be a cone and the plurality of connecting rods 1221 may be unequal in length. Therefore, the conical flow dividing piece 121 can be obliquely arranged through the connecting rods 1221 with different lengths, so that the flow dividing piece 121 can guide more electrolyte to more positions of the electrode assemblies, and the flow guiding uniformity of the flow dividing piece 121 is ensured.
In some possible embodiments, the connecting rod 1221 is integrally formed with the component body 110, or the connecting rod 1221 is welded to the component body 110, or the connecting rod 1221 is snapped to the component body 110.
When the connecting rod 1221 is integrally formed with the component body 110, an end portion of an end of the connecting rod 1221 to which the second surface 112 is connected is integrally formed with the second surface 112, whereby assembly components between the connecting rod 1221 and the component body 110 can be reduced, thereby simplifying the process of assembling the flow splitter 121.
When the connecting rod 1221 is welded to the component body 110, the end of the connecting rod 1221 to the second surface 112 is welded to the second surface 112, whereby it is possible to avoid providing a connecting structure between the connecting rod 1221 and the second surface 112, thereby simplifying the connecting structure between the connecting rod 1221 and the second surface 112.
When the connecting rod 1221 is clamped to the component body 110, the end portion of the end, connected to the second surface 112, of the connecting rod 1221 is clamped, so that when the splitter 121 is damaged, the whole splitter 100 is not required to be replaced, and only the splitter 121 is required to be replaced, thereby reducing the maintenance cost of the splitter 100.
In some possible embodiments, referring to fig. 8 and 10, when the connecting rod 1221 is clamped to the component body 110, the end of the connecting rod 1221 connected to the component body 110 is provided with a clamping protrusion 12211, the second surface 112 is provided with a clamping hole 1121, or the end of the connecting rod 1221 connected to the component body 110 is provided with a clamping hole, and the second surface 112 is provided with a clamping protrusion 12211; the click projection 12211 is interference fit in the click hole 1121.
Because the connecting rod 1221 is a rigid structure, the clamping strength of the clamping protrusion 12211 can be ensured by providing the clamping protrusion 12211 on the connecting rod 1221, and thus, when the clamping protrusion 12211 is in interference fit with the clamping hole 1121, the component body 110 can be clamped and fixed with the connecting rod 1221.
In some possible embodiments, referring to fig. 8, the connecting rod 1221 includes intersecting first and second guide surfaces 12212, 12213, and an edge 12214 formed by the intersection of the first and second guide surfaces 12212, 12213 faces the end point 1213.
Thus, when electrolyte on the side wall 1211 flows toward the connecting rod 1221, the edge 12214 can secondarily split the electrolyte, and the first and second guide surfaces 12212 and 12213 can secondarily guide the electrolyte, so that the electrolyte can quickly drop onto the electrode assembly, and the efficiency of the electrolyte infiltrating the electrode assembly is improved.
In addition, the edge 12214 formed by the intersection of the first guide surface 12212 and the second guide surface 12213 faces the end point 1213, so that the contact resistance of the connecting rod 1221 against the flow division can be reduced, and the effect of the connecting rod 1221 against the flow division of the electrolyte can be improved.
In some possible embodiments, referring to FIGS. 2 and 8 in combination, the angle between the first and second guide surfaces 12212, 12213 is α,60 α 120.
When alpha is larger than 120 DEG, the too large included angle between the first guide surface 12212 and the second guide surface 12213 can affect the flow guiding speed of the electrolyte, and when alpha is smaller than 60 DEG, the too small included angle between the first guide surface 12212 and the second guide surface 12213 can affect the diffusion area of the electrolyte, thereby ensuring the guiding effect and the flow guiding speed of the first guide surface 12212 and the second guide surface 12213 and simultaneously ensuring the diffusion area of the electrolyte by making alpha smaller than or equal to 60 DEG and smaller than or equal to 120 deg.
In some possible embodiments, the first guide surface 12212 and the second guide surface 12213 are each arcuate surfaces.
The cambered surface can be smoothly transited, so that the situation of plane splashing can be avoided, and the diversion and diversion effects of the connecting rod 1221 on electrolyte are further improved.
Wherein the cambered surface may be concave in a direction towards the interior of the connecting rod 1221 or may be convex in a direction away from the interior of the connecting rod 1221.
In some possible embodiments, referring to fig. 10, the second surface 112 is provided with a boss 1122, a geometric center line of the boss 1122 is coaxial with a central axis of the first liquid injection hole 113, the first liquid injection hole 113 penetrates the boss 1122, and the connecting member 122 is connected to the second surface 112 through the boss 1122.
By providing the boss 1122 on the second surface 112, and connecting member 122 is connected to the second surface 112 through the boss 1122, the connection strength around the first liquid injection hole 113 can be improved, thereby improving the connection stability between the connecting member 122 and the component body 110.
The boss 1122 may be a circular boss 1122, a square boss 1122, or another shaped boss 1122.
Referring to fig. 11, the embodiment of the present application further provides a cap assembly 200, the cap assembly 200 including a cap plate 210 and a partition member 100, the cap plate 210 being provided with a second injection hole 211 penetrating the cap plate 210; the partition member 100 is stacked on the top cover 210, and the first liquid injection hole 113 and the second liquid injection hole 211 in the partition member 100 are coaxial and communicate with each other.
The partition member 100 in this embodiment may have the same structure as any one of the partition members 100 in the foregoing embodiments, and may bring about the same or similar beneficial effects, and specifically, reference may be made to the description in the foregoing embodiments, which is not repeated herein.
Specifically, the top cover 210 is stacked with the partition member 100 and the top cover 210 is connected with the first surface 111 of the partition member 100.
Since the first liquid injection hole 113 and the second liquid injection hole 211 are coaxial and communicate, the liquid injection effect of the cap assembly 200 is improved, and in addition, since the present embodiment is applied to the separator 100 in the above-described embodiment, the uniformity of the wetting of the electrode assembly by the electrolyte is improved.
The top cap assembly 200 may be applied to a square battery or a circular battery.
Referring to fig. 12, the embodiment of the present application also provides a battery 300, the battery 300 including a case 310, an electrode assembly 320, and a top cap assembly 200, wherein the case 310 includes a receiving chamber having an opening 311; the electrode assembly 320 is installed in the receiving chamber; the top cover assembly 200 covers the opening 311.
Since the battery 300 in the present embodiment employs the top cap assembly 200 in the above-described embodiment, the production efficiency of the battery 300 is improved.
In addition, the battery 300 may be a power battery, a lithium battery, or the like.
In some possible embodiments, referring to fig. 12A, there is a liquid passing gap between the bottom wall 1212 of the flow divider 121 in the separator member 100 in the cap assembly 200 and the electrode assembly 320.
Therefore, through the liquid passing gap between the bottom wall 1212 of the shunt 121 and the electrode assembly 320, electrolyte can be conveniently moved in the process of electrolyte injection, and the electrolyte injection efficiency is further improved.
In some possible embodiments, see FIG. 12A, the width of the liquid passing gap is D,1 mm.ltoreq.D.ltoreq.2 mm.
Due to the tension of the liquid surface, a part of electrolyte flows to the lower side along the side wall surface and the bottom wall surface of the shunt member 121, so that when D < 1mm, the shunt member is pressed upwards when the battery is impacted or falls due to the smaller passing clearance, thereby affecting the stability and strength of the shunt structure 120, the electrolyte diffusion speed below the shunt member 121 is smaller due to the smaller passing clearance, thereby reducing the electrolyte injection uniformity, and when D > 2mm, the energy density of the battery 300 is affected due to the overlarge passing clearance, and on the basis, the width of the passing clearance is between 1mm and 2mm, thereby ensuring the diffusion speed of the electrolyte below the shunt member 121, ensuring the uniformity of the electrolyte infiltrating electrode assembly 320, and ensuring the energy density of the battery 300.
Referring to fig. 13, an embodiment of the present application also provides a battery module 400, and the battery module 400 includes at least one battery 300 of the above-described embodiments.
Since the battery module 400 of the present embodiment employs the battery 300 of the above-described embodiment, the production efficiency of the battery module 400 is improved.
The battery module 400 may be an energy storage battery, a battery pack, a power battery, or the like.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (17)
1. A partition member, characterized by being applied to a top cover assembly, comprising:
a component body (110), the component body (110) having a first surface (111) and a second surface (112) opposite to each other, the component body (110) being provided with a first liquid injection hole (113), the first liquid injection hole (113) penetrating the first surface (111) and the second surface (112), the first liquid injection hole (113) being offset from the geometric center of the component body (110);
-a flow dividing structure (120), the flow dividing structure (120) comprising a flow dividing member (121) and a connecting member (122), the flow dividing member (121) being located below the first liquid injection hole (113) in a direction of the first surface (111) towards the second surface (112), the flow dividing member (121) comprising a side wall (1211) and a bottom wall (1212), one end of the side wall (1211) being connected to a peripheral edge of the bottom wall (1212), the other end extending along the direction of the second surface (112) towards the first surface (111) and converging to form an end point (1213), the length of the side wall (1211) along the direction of the first surface (111) towards the second surface (112) being greater than the length of the side wall away from the geometric center of the component body (110), the side wall (1211) being adapted to divide a flow from the first surface (111) towards the second surface (112) through the first liquid injection hole (113) and to connect to the other end of the side wall (112);
-the angle between the two sides of the cross-section of the side wall (1211) and the direction of the first surface (111) pointing towards the second surface (112) is acute, the cross-section passing through the end point (1213);
an included angle between a side edge of the cross section, which is close to the geometric center of the component body (110), and a direction of the first surface (111) pointing to the second surface (112) is a1, and an included angle between a side edge of the cross section, which is far away from the geometric center of the component body (110), and a direction of the first surface (111) pointing to the second surface (112) is a2, wherein a1 > a2.
2. The partition member of claim 1, wherein the side wall (1211) is a pseudo-tapered side wall (1211).
3. Partition element according to claim 1, characterized in that the angle between the two sides in the cross-section of the flow divider (121) and the direction of the first surface (111) pointing towards the second surface (112) is a,45 ° -a-60 °.
4. The partition member according to claim 1, wherein a distance between the end point (1213) and the first liquid injection hole (113) is d,1 mm.ltoreq.d.ltoreq.2.5 mm.
5. The separator component according to claim 1, wherein the end point (1213) is offset from a central axis of the first liquid injection hole (113) and away from a geometric center of the component body (110).
6. The partition member according to any one of claims 1 to 5, wherein the connecting member (122) includes a plurality of connecting rods (1221), a plurality of the connecting rods (1221) are disposed at intervals around the first liquid injection hole (113), and a plurality of the connecting rods (1221) are identical in length.
7. The partition member according to claim 6, wherein the connecting rod (1221) is integrally formed with the member body (110), or the connecting rod (1221) is welded to the member body (110), or the connecting rod (1221) is clamped to the member body (110).
8. The partition member according to claim 7, wherein when the connecting rod (1221) is clamped to the member body (110), a clamping projection (12211) is provided at an end of the connecting rod (1221) connected to the member body (110), and a clamping hole is provided on the second surface (112); or alternatively, the first and second heat exchangers may be,
A clamping hole is formed in one end, connected with the part body (110), of the connecting rod (1221), and a clamping protrusion (12211) is arranged on the second surface (112);
the clamping protrusion (12211) is interference fit in the clamping hole.
9. The separator element according to claim 6, wherein the connecting rod (1221) comprises a first (12212) and a second (12213) intersecting guide surfaces, the edge (12214) of the first (12212) and second (12213) guide surfaces intersecting towards the end point (1213).
10. The partition element according to claim 9, wherein the angle between the first guide surface (12212) and the second guide surface (12213) is α,60 ° - α -120 °.
11. The partition member according to claim 9, wherein the first guide surface (12212) and the second guide surface (12213) are each cambered surfaces.
12. The partition member according to any one of claims 1 to 5, wherein a boss (1122) is provided on the second surface (112), the geometric center line of the boss (1122) is coaxial with the center axis of the first liquid injection hole (113), the first liquid injection hole (113) penetrates the boss (1122), and the connecting member (122) connects the boss (1122) to achieve connection with the second surface (112).
13. A header assembly, comprising:
a top cover plate (210), wherein a second liquid injection hole (211) penetrating through the top cover plate (210) is arranged on the top cover plate (210);
the partition member (100) according to any one of claims 1 to 12, wherein the partition member (100) is provided in a stack on the top cover plate (210), and wherein the first liquid injection hole (113) in the partition member (100) is coaxial with and communicates with the second liquid injection hole (211).
14. A battery, comprising:
-a housing (310), the housing (310) comprising a receiving cavity having an opening (311);
an electrode assembly (320), the electrode assembly (320) being mounted within the receiving chamber;
the cap assembly (200) of claim 13, said cap assembly (200) covering said opening (311).
15. The battery of claim 14, wherein a flow gap is provided between a bottom wall (1212) of a flow divider (121) in a separator member (100) in the top cap assembly (200) and the electrode assembly (320).
16. The cell of claim 15, wherein the width of the liquid passing gap is D,1mm ∈d ∈2mm.
17. A battery module characterized in that it comprises at least one battery (300) according to any one of claims 14-16.
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| CN202310718990.1A CN116454547B (en) | 2023-06-16 | 2023-06-16 | Partition component, top cover assembly, battery and battery module |
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| CN202310718990.1A CN116454547B (en) | 2023-06-16 | 2023-06-16 | Partition component, top cover assembly, battery and battery module |
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| CN212392313U (en) * | 2020-06-23 | 2021-01-22 | 苏州凌威新能源科技有限公司 | Battery cover plate assembly |
| CN213601921U (en) * | 2020-10-21 | 2021-07-02 | 厦门海辰新能源科技有限公司 | Top cover assembly and secondary battery |
| CN218849740U (en) * | 2022-09-20 | 2023-04-11 | 天津市捷威动力工业有限公司 | Top cover assembly and battery |
| CN219106331U (en) * | 2022-12-15 | 2023-05-30 | 湖北亿纬动力有限公司 | Top cap subassembly and battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI370572B (en) * | 2004-12-22 | 2012-08-11 | Panasonic Corp | Valve regulated lead-acid battery |
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| JP2016207353A (en) * | 2015-04-17 | 2016-12-08 | トヨタ自動車株式会社 | Secondary battery |
| JP2018045846A (en) * | 2016-09-13 | 2018-03-22 | リチウム エナジー アンド パワー ゲゼルシャフト ミット ベシュレンクテル ハフッング ウント コンパニー コマンディトゲゼルシャフトＬｉｔｈｉｕｍ Ｅｎｅｒｇｙ ａｎｄ Ｐｏｗｅｒ ＧｍｂＨ ＆ Ｃｏ． ＫＧ | Power storage element |
| CN212392313U (en) * | 2020-06-23 | 2021-01-22 | 苏州凌威新能源科技有限公司 | Battery cover plate assembly |
| CN213601921U (en) * | 2020-10-21 | 2021-07-02 | 厦门海辰新能源科技有限公司 | Top cover assembly and secondary battery |
| CN218849740U (en) * | 2022-09-20 | 2023-04-11 | 天津市捷威动力工业有限公司 | Top cover assembly and battery |
| CN219106331U (en) * | 2022-12-15 | 2023-05-30 | 湖北亿纬动力有限公司 | Top cap subassembly and battery |
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| CN116454547A (en) | 2023-07-18 |
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