CN116937026B - Lower plastic, top cover assembly and battery - Google Patents
Lower plastic, top cover assembly and battery Download PDFInfo
- Publication number
- CN116937026B CN116937026B CN202311189784.2A CN202311189784A CN116937026B CN 116937026 B CN116937026 B CN 116937026B CN 202311189784 A CN202311189784 A CN 202311189784A CN 116937026 B CN116937026 B CN 116937026B
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- Prior art keywords
- lower plastic
- skirt
- liquid
- edge
- connecting plate
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- 238000002347 injection Methods 0.000 claims description 47
- 239000007924 injection Substances 0.000 claims description 47
- 238000004804 winding Methods 0.000 claims description 47
- 239000007788 liquid Substances 0.000 claims description 34
- 230000000149 penetrating effect Effects 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 11
- 238000004378 air conditioning Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 63
- 230000035515 penetration Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The application relates to a lower plastic. Comprising the following steps: the number of the skirt edges is multiple, and the skirt edges are arranged at intervals; the connecting unit is connected between the two skirt rims; along the width direction of the lower plastic, the size of the skirt is larger than that of the connecting unit, and the edge of the connecting unit and the edge of the skirt keep a set distance. In view of the fact that the size of the connecting unit is smaller than that of the skirt edge along the width direction of the lower plastic, the set distance is kept between the edge of the connecting unit in the width direction of the lower plastic and the edge of the skirt edge in the width direction of the lower plastic, so that the lower plastic is provided with a certain concave space, the size of the connecting unit in the width direction of the lower plastic can be reduced, and the volume of the lower plastic is reduced. On the basis of unchanged total volume of the battery cell, the volume of the accommodating cavity enclosed by the lower plastic and the shell is increased, so that the amount of electrolyte which can be accommodated in the accommodating cavity is increased, and the capacity of the whole battery is improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a lower plastic, a top cover assembly and a battery.
Background
Batteries are an important energy storage device, so that the batteries have extremely wide application in the field of new energy. However, in the case of the conventional battery, there is a defect that an electrolyte injection space is insufficient, so that a sufficient amount of electrolyte cannot be stored in the battery, ultimately affecting the capacity of the battery.
Disclosure of Invention
One technical problem addressed by the present application is how to increase the capacity of a battery.
A lower plastic, comprising:
the number of the skirt edges is multiple, and the skirt edges are arranged at intervals; a kind of electronic device with high-pressure air-conditioning system
A connecting unit connected between the two skirts; along the width direction of the lower plastic, the size of the skirt is larger than that of the connecting unit, and the edge of the connecting unit and the edge of the skirt keep a set distance.
In one embodiment, the connecting unit comprises a connecting plate, a side barrel and an end cover, the connecting plate is connected with the skirt edge, a through hole penetrating through the connecting plate in the thickness direction of the connecting plate is formed in the connecting plate, the side barrel is arranged on the surface of the connecting plate, which is arranged back to the winding core, in a protruding mode and surrounds the through hole, the end cover is connected with one end, far away from the connecting plate, of the side barrel, and a liquid injection hole penetrating through the end cover in the thickness direction of the end cover and communicating with the through hole is formed in the end cover.
In one embodiment, the end cover is further provided with explosion-proof holes and first liquid-permeable holes penetrating through the end cover in the thickness direction of the end cover, and the number of the first liquid-permeable holes and the number of the liquid-injecting holes are multiple and the first liquid-permeable holes and the liquid-injecting holes are arranged around the explosion-proof holes together.
In one embodiment, the aperture of the liquid injection hole is 0.5mm to 1mm, the aperture of the first liquid penetration hole is larger than the aperture of the liquid injection hole, and the number of the first liquid penetration holes is larger than the number of the liquid injection holes.
In one embodiment, a plurality of second liquid-permeable holes penetrating through the skirt edge in the thickness direction of the skirt edge are formed in the skirt edge, and the aperture of each second liquid-permeable hole is larger than that of each liquid-injecting hole.
In one embodiment, along the thickness direction of the lower plastic, the size of the connecting plate is smaller than that of the skirt edge, one side, close to the winding core, of the connecting plate is flush with one side, close to the winding core, of the skirt edge, and a set distance is kept between the connecting plate and one side, facing away from the winding core, of the skirt edge.
In one embodiment, the surfaces of the end cap and the skirt disposed away from the winding core are flush with each other.
In one embodiment, capillary micropores penetrating through the connecting plate in the thickness direction of the lower plastic are formed in the connecting plate; and/or capillary micropores penetrating through the skirt edge along the thickness direction of the lower plastic are also formed on the skirt edge.
In one embodiment, a plurality of diversion trenches are concavely formed on the surface of the connection plate, which is arranged towards the winding core, and the diversion trenches extend to two opposite ends of the connection plate along the length direction of the lower plastic, and the diversion trenches are arranged along the width direction of the lower plastic.
In one embodiment, the skirt comprises a base panel, a first side panel and a second side panel; the first side plates and the second side plates are connected with the edge of the base plate and are arranged opposite to the base plate in a protruding mode towards the surface of the winding core, the number of the first side plates is two, the two first side plates are arranged at intervals in the width direction of the lower plastic, the second side plates are connected between two first side plates and close to one ends of the connecting units, and the connecting units are connected with the second side plates.
In one embodiment, at least one of the following schemes is further included:
the connecting unit is provided with a mounting hole for mounting the electrode, and the mounting hole penetrates through the connecting unit along the thickness direction of the connecting unit;
along the width direction of the lower plastic, the skirt edge is at least twice as large as the connecting unit;
the distance between the connecting unit and the two edges of one side of the skirt edge in the width direction of the lower plastic is equal to the distance between the two edges of the other side of the skirt edge in the width direction of the lower plastic.
A roof assembly comprising the lower plastic of any of the above.
The battery comprises a shell, a winding core and the top cover assembly, wherein the winding core is arranged in a containing cavity of the shell, and the top cover assembly is connected with the shell and covers the containing cavity.
One technical effect of one embodiment of the present application is: in view of the fact that the size of the connecting unit is smaller than that of the skirt edge along the width direction of the lower plastic, the set distance is kept between the edge of the connecting unit in the width direction of the lower plastic and the edge of the skirt edge in the width direction of the lower plastic, so that the lower plastic is provided with a certain concave space, the size of the connecting unit in the width direction of the lower plastic can be reduced, and the volume of the lower plastic is reduced. On the basis of unchanged total volume of the battery cell, the volume of the accommodating cavity enclosed by the lower plastic and the shell is increased, so that the amount of electrolyte which can be accommodated in the accommodating cavity is increased, and the capacity of the whole battery is improved.
Drawings
Fig. 1 is an exploded view of a battery according to an embodiment.
Fig. 2 is a schematic perspective view of the lower plastic in the battery shown in fig. 1.
Fig. 3 is a schematic top view of the lower plastic shown in fig. 2.
Fig. 4 is a schematic front view of the lower plastic shown in fig. 2.
Fig. 5 is a schematic perspective view of the plastic in fig. 2 at another view angle.
Reference numerals: lower plastic 10, connection unit 100, connection plate 110, through hole 111, capillary hole 112, diversion trench 113, mounting hole 114, boss 120, side tube 121, end cap 122, explosion proof hole 1221, liquid filling hole 1222, first liquid permeable hole 1223, skirt 200, substrate 230, second liquid permeable hole 231, first side plate 210, second side plate 220, accommodation space 240, battery 20, top cover assembly 21, upper cover 201, input hole 202, winding core 22, housing 23, accommodation cavity 24.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element 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 application.
Furthermore, the terms "first," "second," and the like, if any, 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 at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through 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.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
Referring to fig. 1, 2, 3 and 4, a battery 20 provided in an embodiment of the present application includes a top cap assembly 21, a winding core 22 and a case 23. The winding core 22 is accommodated in the shell 23, the top cover assembly 21 is connected with the shell 23, and the top cover assembly 21 can play a role of sealing the accommodating cavity 24 of the shell 23, so that the winding core 22 is sealed in the shell 23. In fact, the housing 23 is provided with a housing cavity 24, the winding core 22 is housed in the housing cavity 24, and the top cover assembly 21 is connected to the housing 23 and covers the housing cavity 24. The top cap assembly 21 further includes an upper cap 201 and a lower plastic 10, the upper cap 201 and the lower plastic 10 are stacked on each other, the upper cap 201 is provided with an input hole 202, and an electrolyte can be injected into the receiving chamber 24 through the input hole 202.
Referring to fig. 2, 3 and 4, in some embodiments, the lower plastic 10 includes a connecting unit 100 and a skirt 200, and both the skirt 200 and the connecting unit 100 may have a substantially rectangular structure. The number of the skirt edges 200 is two, and the two skirt edges 200 are arranged at intervals along the length direction of the lower plastic 10. One end of the connection unit 100 is connected to one of the skirts 200, and the other end of the connection unit 100 is connected to the other one of the skirts 200, so that the connection unit 100 is connected between the two skirts 200. The size of the connection unit 100 is greater than that of the skirt 200 along the length direction of the lower plastic 10. Along the width direction of the lower plastic 10, the size of the connection unit 100 is smaller than the size of the skirt 200, and the width-direction edge of the lower plastic 10 of the connection unit 100 and the width-direction edge of the skirt 200 of the lower plastic 10 maintain a set distance L. As shown in fig. 2, the X-axis direction represents the length direction of the lower plastic 10, the Y-axis direction represents the width direction of the lower plastic 10, the Z-axis direction represents the thickness direction of the lower plastic 10,
if the mode that the edge of the connecting unit 100 in the width direction of the lower plastic 10 and the edge of the skirt 200 in the width direction of the lower plastic 10 are flush with each other is adopted, the whole lower plastic 10 is rectangular, so that the lower plastic 10 has a larger volume. On the basis of the constant total volume of the battery 20, the volume of the accommodating cavity 24 enclosed by the lower plastic 10 and the shell 23 is smaller, so that the amount of electrolyte which can be accommodated in the accommodating cavity 24 is smaller, and the capacity of the whole battery 20 is influenced.
For the lower plastic 10 in the above embodiment, in view of the fact that the dimension of the connecting unit 100 is smaller than the dimension of the skirt 200 along the width direction of the lower plastic 10, and the set distance L is maintained between the edge of the connecting unit 100 in the width direction of the lower plastic 10 and the edge of the skirt 200 in the width direction of the lower plastic 10, the lower plastic 10 can have a certain concave space, which can be understood as being formed by removing a part of material from the lower plastic 10 in the above-mentioned hypothetical pattern, the dimension of the connecting unit 100 in the width direction of the lower plastic 10 can be reduced, thereby reducing the volume of the lower plastic 10. On the basis of the constant total volume of the battery 20, the volume of the accommodating cavity 24 enclosed by the lower plastic 10 and the shell 23 is increased, so that the amount of electrolyte which can be accommodated in the accommodating cavity 24 is increased, and the capacity of the whole battery 20 is improved.
In some embodiments, the dimension of the skirt 200 along the width of the lower plastic 10 may be at least twice the dimension of the connection unit 100 along the width of the lower plastic 10, e.g., the dimension of the skirt 200 along the width of the lower plastic 10 is exactly twice the dimension of the connection unit 100 along the width of the lower plastic 10. The connecting unit 100 and skirt 200 are located wider than the lower plastic 10The distance between two edges on one side in the degree direction is denoted as a first distance L 1 The distance between the connecting unit 100 and the two edges of the skirt 200 on the other side in the width direction of the lower plastic 10 is denoted as a second distance L 2 First distance L 1 With a second distance L 2 The values of the two can be equal, so that the whole lower plastic 10 is approximately symmetrical, and the manufacturing and the assembly of the lower plastic 10 are facilitated.
Referring to fig. 2, 3 and 4, in some embodiments, the connection unit 100 includes a connection plate 110 and a protrusion 120, the connection plate 110 may be a substantially rectangular plate, and both ends of the connection plate 110 are connected with two skirts 200, respectively. The protruding portion 120 protrudes and is disposed on a surface of the connection plate 110 facing away from the winding core 22 in the thickness direction of the connection plate 110. The edges of the protrusions 120 in the width direction of the lower plastic 10 and the edges of the connection plate 110 in the width direction of the lower plastic 10 may be flush with each other, and the edges of the protrusions 120 in the length direction of the lower plastic 10 and the edges of the connection plate 110 in the length direction of the lower plastic 10 may be spaced apart from each other by a certain distance. The protruding portion 120 includes a side tube 121 and an end cap 122, the connecting plate 110 is provided with a through hole 111, the through hole 111 penetrates through the whole connecting plate 110 along the thickness of the connecting plate 110, the side tube 121 is arranged on the connecting plate 110 in a protruding manner, the side tube 121 is arranged around the through hole 111, and the end cap 122 is connected with one end, far away from the connecting plate 110, of the side tube 121, so that the end cap 122 is located above the through hole 111 to cover the through hole 111. In view of the reduction in the dimension of the connecting plate 110 in the width direction of the lower plastic 10, the dimension of the entire protruding portion 120 in the width direction of the lower plastic 10 is reduced, and thus the total volume of the connecting unit 100 is further reduced, and the volume of the accommodating cavity 24 enclosed by the lower plastic 10 and the housing 23 is further increased, so that the amount of electrolyte in the accommodating cavity 24 is increased, and the capacity of the battery 20 is increased.
Referring to fig. 2, 3 and 5, explosion-proof hole 1221 is formed in the middle area of end cover 122, explosion-proof hole 1221 penetrates through the whole end cover 122 along the thickness direction of end cover 122, so that explosion-proof hole 1221 is communicated with through hole 111, and by providing explosion-proof hole 1221, the higher pressure in accommodating cavity 24 can be unloaded through explosion-proof hole 1221, so that the potential safety hazard existing in accommodating cavity 24 due to high pressure is reduced. The edge area of the end cover 122 is provided with a plurality of liquid injection holes 1222, and the plurality of liquid injection holes 1222 may be uniformly distributed in a circular area of the edge of the end cover 122, which may be located directly under the input hole 202 of the upper cover 201. When electrolyte is injected into input aperture 202, electrolyte exiting input aperture 202 will first reach injection aperture 1222 in end cap 122. The aperture of the liquid injection hole 1222 may be 0.5mm to 1mm, for example, the specific value of the aperture of the liquid injection hole 1222 may be 0.5mm, 0.8mm, 1mm, or the like.
In some embodiments, the end cover 122 is further provided with first liquid-permeable holes 1223, the first liquid-permeable holes 1223 are formed in the edge area of the end cover 122, the aperture of the first liquid-permeable holes 1223 may be larger than the aperture of the liquid-injecting holes 1222, the number of the first liquid-permeable holes 1223 may be larger than the number of the liquid-injecting holes 1222, and all the first liquid-permeable holes 1223 and the liquid-injecting holes 1222 are disposed around the explosion-proof hole 1221. The connecting plate 110 may further be provided with capillary micropores 112, where the capillary micropores 112 penetrate through the whole connecting plate 110 along the thickness direction of the connecting plate 110, and the pore diameter of the capillary micropores 112 may be in a micron level, so that the capillary micropores 112 can generate capillary force on the liquid.
If a mode in which only the filling hole 1222 is provided in the end cover 122 is adopted, when the electrolyte reaches the filling hole 1222, the electrolyte flows into the receiving chamber 24 through the filling hole 1222 and the through hole 111. On the one hand, in order to ensure the filling efficiency of the electrolyte in the receiving chamber 24, the filling pressure of the electrolyte in the filling hole 1222 must be increased in view of the small channel formed in the filling hole 1222. When the injection pressure of the electrolyte increases, the electrolyte generates a larger impact force on the pole piece of the winding core 22, so that the active substances attached to the pole piece drop under the impact force of the electrolyte. Of course, in order to reduce the injection pressure of the electrolyte in the injection hole 1222 and reduce the impact force to the pole piece, the injection time of the electrolyte is prolonged, thereby reducing the injection efficiency of the electrolyte. On the other hand, the electrolyte injected into the accommodating cavity 24 is difficult to distribute to various positions in the accommodating cavity 24 in a short time, the time for the winding core 22 to be fully soaked is reduced, and the electrolyte injected into the accommodating cavity 24 is accumulated in a local area below the liquid injection hole 1222 for a long time, so that the pressure of the local area below the liquid injection hole 1222 in the accommodating cavity 24 is increased, and thus the electrolyte in the accommodating cavity 24 is injected out of the battery 20 through the liquid injection hole 1222 and the input hole 202, namely, the liquid injection phenomenon exists.
With respect to the lower plastic 10 in the above embodiment, in view of the existence of the first liquid-permeable hole 1223, when the electrolyte reaches the liquid-injecting hole 1222, a part of the electrolyte flows into the accommodating cavity 24 through the liquid-injecting hole 1222, and another part of the electrolyte flows into the accommodating cavity 24 through the first liquid-permeable hole 1223, so that the injecting path of the electrolyte can be widened. On the one hand, the injection time of the electrolyte is reduced, and the injection efficiency of the electrolyte is improved. On the other hand, in the case that the electrolyte is absorbed in the unit time of the accommodating cavity 24, the injection pressure of the electrolyte can be reduced, and the pressure of the electrolyte flowing out of the first liquid-permeable hole 1223 and the liquid-injecting hole 1222 can be reduced, so that the impact force of the electrolyte on the pole piece is reduced, and the pole piece is effectively prevented from falling off. In still another aspect, the electrolyte can be rapidly distributed to each area in the accommodating cavity 24 through the liquid injection holes 1222 and the first liquid penetration holes 1223, that is, the injection coverage area of the electrolyte relative to the accommodating cavity 24 is increased, the time for the winding core 22 to be fully immersed is reduced, the phenomenon that the local pressure is increased due to the fact that the electrolyte is accumulated in the local area in the accommodating cavity 24 for a long time is also reduced, the electrolyte is prevented from being injected out of the battery 20 through the liquid injection holes 1222, and thus the liquid injection phenomenon is reduced.
Further, in view of the fact that the connecting plate 110 is further provided with capillary micropores 112, when the electrolyte is distributed on the surface of the connecting plate 110 facing away from the winding core 22, a part of the electrolyte can also permeate into the connecting plate 110 through the capillary micropores 112 under the action of capillary force generated by the capillary micropores 112, and finally flows into the accommodating cavity 24 from the connecting plate 110 toward the surface of the winding core 22. Therefore, the injection path of the electrolyte can be further widened, the injection efficiency is improved, and the injection pressure is reduced. Meanwhile, in view of the larger area of the connecting plate 110 covering the accommodating cavity 24, the area of the electrolyte flowing out of the capillary micropores 112 and entering the accommodating cavity 24 is increased, the injection coverage area of the electrolyte relative to the accommodating cavity 24 is further improved, the time for completely soaking the winding core 22 is reduced, and the injection phenomenon is also reduced.
Referring to fig. 3, 4 and 5, in some embodiments, the connection plate 110 is further provided with a plurality of diversion trenches 113, and the diversion trenches 113 are formed by recessing the surface of the connection plate 110 facing the winding core 22. The diversion trenches 113 can extend to opposite ends of the connecting plate 110 along the length direction of the lower plastic 10, the diversion trenches 113 are arranged along the width direction of the lower plastic 10, and the electrolyte drops into the accommodating cavity 24 from the diversion trenches 113. By arranging the diversion trench 113, the diversion trench 113 can cover most areas of the accommodating cavity 24, so that the electrolyte falling from the diversion trench 113 can cover most areas of the accommodating cavity 24, the injection coverage area of the electrolyte relative to the accommodating cavity 24 is further improved, the time for completely soaking the winding core 22 is reduced, and the injection phenomenon is also reduced. In other words, the diversion trench 113 extending along the length direction of the lower plastic 10 may extend to two ends of the corresponding winding core 22 along the length direction, so that the electrolyte flowing out of the diversion trench 113 covers each area along the length direction of the winding core 22 as much as possible. And the plurality of guide grooves 113 are arranged along the width direction of the lower plastic 10 so that the electrolyte flowing out of all the guide grooves 113 covers each area in the thickness direction of the winding core 22 as much as possible. This allows the electrolyte flowing out of the flow guide grooves 113 to uniformly infiltrate each region of the winding core 22, ensuring uniform infiltration of the winding core 22.
In some embodiments, the connecting plate 110 is further provided with two mounting holes 114, the two mounting holes 114 are located on opposite sides of the protruding portion 120 along the length direction of the lower plastic 10, the mounting holes 114 penetrate through the whole connecting plate 110 along the thickness direction of the connecting plate 110, and the two mounting holes 114 are respectively used for mounting the positive electrode column and the negative electrode column of the battery 20.
Referring to fig. 2, 3 and 5, in some embodiments, the skirt 200 includes a base panel 230, a first side panel 210 and a second side panel 220. The base 230, the first side 210 and the second side 220 may all have a substantially rectangular structure. The number of the first side plates 210 is two, the two first side plates 210 are arranged at intervals along the width direction of the lower plastic 10, so that the two first side plates 210 are respectively connected with the two short sides of the base plate 230, the second side plate 220 is connected with one long side of the base plate 230, so that the second side plate 220 is connected between one ends of the two first side plates 210 close to the connection unit 100, and the connection plate 110 of the connection unit 100 is connected with the second side plate 220. The first side plate 210 and the second side plate 220 are respectively protruded from the surface of the substrate 230 disposed towards the winding core 22, so that the first side plate 210 and the second side plate 220 are located at the same side of the substrate 230 in the thickness direction, and therefore, the substrate 230, the first side plate 210 and the second side plate 220 can three-dimensionally enclose a containing space 240, and the containing space 240 can be used for containing other components in the battery 20.
In some embodiments, the dimension of the connecting plate 110 is smaller than the dimension of the skirt 200 along the thickness direction of the lower plastic 10, the ends of the connecting plate 110 and the skirt 200 near the winding core 22 are flush with each other, and the ends of the connecting plate 110 and the skirt 200 facing away from the winding core 22 are kept at a set distance H. In other words, along the thickness direction of the lower plastic 10, the dimension of the connecting plate 110 is smaller than the dimension of the substrate 230, and the sides of the connecting plate 110 and the second side plate 220, which are close to the winding core 22 in the thickness direction of the lower plastic 10, are flush with each other, and the sides of the connecting plate 110 and the second side plate 220, which are far away from the winding core 22 in the thickness direction of the lower plastic 10, are kept at a set distance H, so that the surfaces of the connecting plate 110 and the substrate 230, which are disposed opposite to the winding core 22, are kept at the set distance H. The surfaces of end cap 122 and skirt 200 that face away from core 22 are flush with one another, and it is understood that the surfaces of end cap 122 and base 230 that face away from core 22 are flush with one another. By this arrangement, the lower plastic 10 and the upper cover 201 can be easily mounted.
Referring to fig. 2, 3 and 5, in some embodiments, a plurality of second liquid-permeable holes 231 penetrating through the skirt 200 along the thickness direction of the skirt 200 are formed on the skirt 200, for example, the second liquid-permeable holes 231 are formed on the substrate 230, the plurality of second liquid-permeable holes 231 may be arranged on the substrate 230 in a matrix, and the aperture of the second liquid-permeable holes 231 may be larger than that of the first liquid-permeable holes 1223. Through setting up second liquid-permeable hole 231 for some of electrolyte will shunt to holding chamber 24 through second liquid-permeable hole 231 in, so can widen the injection route of electrolyte, thereby improve annotate liquid efficiency, and reduce annotate liquid pressure in order to reduce the impact force to the pole piece, and can make some electrolyte flow into the holding intracavity 24 with the region that second liquid-permeable hole 231 corresponds, further improve the injection coverage area of electrolyte relative to holding chamber 24, reduce the time that core 22 was fully infiltrated and annotate the liquid injection phenomenon. Since at least a portion of the second liquid-permeable holes 231 are farther from the liquid-permeable holes 1222 than the first liquid-permeable holes 1223, the electrolyte needs to flow from the liquid-permeable holes 1222 to the second liquid-permeable holes 231 along the length direction of the lower plastic 10, so that the amount of electrolyte flowing into the second liquid-permeable holes 231 per unit time is smaller than that of electrolyte flowing into the first liquid-permeable holes 1223, by setting the aperture of the second liquid-permeable holes 231 to be larger than that of the first liquid-permeable holes 1223, the electrolyte flowing into the accommodating chambers 24 from the first liquid-permeable holes 1223 and the second liquid-permeable holes 231 per unit time can be substantially equal, i.e., the electrolyte in each area of the accommodating chambers 24 is ensured to be uniformly distributed, and the time for the winding core 22 to be completely immersed and the injection phenomenon are further reduced.
In some embodiments, capillary micro holes 112 penetrating the skirt 200 along the thickness direction of the lower plastic 10 are further formed on the skirt 200, for example, the capillary micro holes 112 may be formed on the base plate 230, the first side plate 210 and the second side plate 220. However, when the electrolyte is distributed on the surface of the skirt 200 facing away from the winding core 22, a part of the electrolyte can also permeate into the skirt 200 through the capillary holes 112 under the action of the capillary force generated by the capillary holes 112, and finally flows into the accommodating cavity 24 from the surface of the skirt 200 facing toward the winding core 22. Of course, the diversion trench 113 on the connection plate 110 may further extend to the second side plate 220, and the surface of the substrate 230 facing the winding core 22 may also be recessed to form the diversion trench 113. With reference to the above description of providing the capillary micro-holes 112 and the diversion trenches 113 on the connection plate 110, the liquid injection efficiency can be improved, the liquid injection pressure can be reduced to reduce the impact force on the pole piece, and the time for the winding core 22 to be completely immersed and the injection phenomenon can be reduced.
In view of the protruding arrangement of the side tube 121 on the connection plate 110, the end cap 122 is connected to the end of the side tube 121 far from the connection plate 110, so that the end cap 122 and the connection plate 110 are arranged at intervals along the thickness direction of the lower plastic 10, i.e. the end cap 122 and the connection plate 110 have a certain height difference along the thickness direction of the lower plastic 10, and the electrolyte on the end cap 122 can flow to the connection plate 110 through the side tube 121 and flow into the accommodating cavity 24 through the capillary micropores 112 on the connection plate 110. Meanwhile, the whole protruding portion 120 can support the upper cover 201, so that electrolyte can flow in the space between the upper cover 201 and the connecting plate 110, and the electrolyte returning to the liquid injection hole 1222 from the container cavity 24 can enter the space, and the space plays a role in buffering, so that the electrolyte returning to the liquid injection hole 1222 can be effectively prevented from flowing out of the input hole 202 of the upper cover 201, and the effect of reducing liquid injection can be achieved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (13)
1. A lower plastic, comprising:
the number of the skirt edges is multiple, and the skirt edges are arranged at intervals; a kind of electronic device with high-pressure air-conditioning system
A connecting unit connected between the two skirts; the size of the skirt edge is larger than that of the connecting unit along the width direction of the lower plastic, and the edge of the connecting unit and the edge of the skirt edge keep a set distance;
the skirt comprises a base plate, a first side plate and a second side plate; the first side plates and the second side plates are connected with the edge of the substrate and are arranged in a protruding mode relative to the surface of the substrate, which is arranged towards the winding core, the number of the first side plates is two, the two first side plates are arranged at intervals along the width direction of the lower plastic, the second side plates are connected between one ends, close to the connecting units, of the two first side plates, and the connecting units are connected with the second side plates;
the connecting unit comprises a connecting plate, a side cylinder and an end cover, wherein the connecting plate is connected with the skirt edge, a through hole penetrating through the connecting plate along the thickness direction of the connecting plate is formed in the connecting plate, the side cylinder is convexly arranged on the surface of the connecting plate, which is arranged back to the winding core, and surrounds the through hole, and the end cover is connected with one end, far away from the connecting plate, of the side cylinder;
the base plate is farther away from the winding core of the battery relative to the connecting plate.
2. The lower plastic according to claim 1, wherein the end cap is provided with a liquid injection hole penetrating the end cap in the thickness direction of the end cap and communicating with the penetrating hole.
3. The lower plastic of claim 2, wherein the end cap is further provided with explosion-proof holes and first liquid-permeable holes penetrating through the end cap along the thickness direction of the end cap, and the number of the first liquid-permeable holes and the number of the liquid-injecting holes are multiple and both of the first liquid-permeable holes and the liquid-injecting holes are arranged around the explosion-proof holes together.
4. A lower plastic according to claim 3, wherein the aperture of the liquid injection holes is 0.5mm to 1mm, the aperture of the first liquid-permeable holes is larger than the aperture of the liquid injection holes, and the number of the first liquid-permeable holes is larger than the number of the liquid injection holes.
5. The lower plastic according to claim 2, wherein a plurality of second liquid-permeable holes penetrating through the skirt in the thickness direction of the skirt are formed in the skirt, and the aperture of the second liquid-permeable holes is larger than that of the liquid-injecting holes.
6. The lower plastic according to claim 2, wherein the dimension of the connecting plate is smaller than the dimension of the skirt in the thickness direction of the lower plastic, the connecting plate and the side of the skirt close to the winding core are flush with each other, and the connecting plate and the side of the skirt facing away from the winding core are kept at a set distance.
7. The lower plastic of claim 6, wherein the end cap and the skirt are flush with each other on a surface facing away from the core.
8. The lower plastic according to claim 2, wherein capillary micropores penetrating through the connection plate in a thickness direction of the lower plastic are formed in the connection plate; and/or capillary micropores penetrating through the skirt edge along the thickness direction of the lower plastic are also formed on the skirt edge.
9. The lower plastic according to claim 2, wherein a plurality of guide grooves are concavely formed on the surface of the connection plate facing the winding core, the guide grooves extend to opposite ends of the connection plate along the length direction of the lower plastic, and the guide grooves are arranged along the width direction of the lower plastic.
10. The lower plastic according to claim 1, wherein the connection unit is provided with a mounting hole for mounting the electrode, and the mounting hole penetrates the connection unit in a thickness direction of the connection unit.
11. The lower plastic of claim 1, further comprising at least one of the following:
along the width direction of the lower plastic, the skirt edge is at least twice as large as the connecting unit;
the distance between the connecting unit and the two edges of one side of the skirt edge in the width direction of the lower plastic is equal to the distance between the two edges of the other side of the skirt edge in the width direction of the lower plastic.
12. A roof assembly comprising the lower plastic of any one of claims 1 to 11.
13. A battery comprising a housing, a winding core and the cap assembly of claim 12, wherein the winding core is disposed in a receiving cavity of the housing, and the cap assembly is connected with the housing and covers the receiving cavity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311189784.2A CN116937026B (en) | 2023-09-15 | 2023-09-15 | Lower plastic, top cover assembly and battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311189784.2A CN116937026B (en) | 2023-09-15 | 2023-09-15 | Lower plastic, top cover assembly and battery |
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| CN116937026A CN116937026A (en) | 2023-10-24 |
| CN116937026B true CN116937026B (en) | 2023-12-29 |
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| CN116937026A (en) | 2023-10-24 |
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