CN109841766B - Cover plate assembly, battery and manufacturing method of cover plate assembly - Google Patents
Cover plate assembly, battery and manufacturing method of cover plate assembly Download PDFInfo
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- CN109841766B CN109841766B CN201910220856.2A CN201910220856A CN109841766B CN 109841766 B CN109841766 B CN 109841766B CN 201910220856 A CN201910220856 A CN 201910220856A CN 109841766 B CN109841766 B CN 109841766B
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- 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
Abstract
The embodiment of the application provides a cover plate assembly, a battery and a manufacturing method of the cover plate assembly. The cover plate component comprises a pole, a glass connecting piece, a battery cover plate and a metal transition part; the metal transition part is sleeved on the pole, and the inner wall of the metal transition part is attached to the outer wall of the pole; and a glass connecting piece is arranged between the outer wall of the metal transition part and the battery cover plate and is used for insulating and hermetically connecting the metal transition part and the battery cover plate. The embodiment of the application realizes the insulation and airtight connection of the metal transition part and the battery cover plate through the glass connecting piece, and the glass connecting piece is not easy to age along with the change of time relative to the polymer, so that the long-time airtightness between the metal transition part and the battery cover plate is ensured.
Description
Technical Field
The application relates to the technical field of power supplies, in particular to a cover plate assembly, a battery and a manufacturing method of the cover plate assembly.
Background
The electrolyte, gas or other substances in the cell (e.g., electrolyte in lithium batteries, combustible gas in fuel cells and cell raw material in solid electrolyte cells) cannot leak, and at the same time, moisture is not allowed to permeate into the cell interior. If the battery cannot ensure airtightness, not only the battery capacity may be reduced over time, but also the poorly sealed battery may be damaged by moisture permeating inside.
The terminals of the battery are sealed by a polymer at present, but the polymer as an organic material is deteriorated and weakened with long-term use, and the airtightness cannot be maintained.
Disclosure of Invention
An object of the embodiments of the present application is to provide a cap plate assembly, a battery, and a method of manufacturing the cap plate assembly, which can solve the problem in the prior art that the airtightness cannot be maintained for a long time by sealing a terminal with a polymer.
In view of the above, in a first aspect, an embodiment of the present application provides a cover plate assembly, including: the battery comprises a pole, a glass connecting piece, a battery cover plate and a metal transition part; the metal transition part is sleeved on the pole, and the inner wall of the metal transition part is attached to the outer wall of the pole; and a glass connecting piece is arranged between the outer wall of the metal transition part and the battery cover plate and is used for insulating and hermetically connecting the metal transition part and the battery cover plate.
In the implementation process, the metal transition part and the battery cover plate are connected in an insulating and airtight mode through the glass connecting piece, and the glass connecting piece is not prone to aging along with the change of time relative to the polymer, so that the long-time air tightness between the metal transition part and the battery cover plate is guaranteed.
In one embodiment, the post includes a base and an extension extending from the base, the cover assembly further includes a first polymer disposed on the base, and the battery cover, the glass connector, and the metal transition are all disposed over the first polymer, the first polymer for mating with the glass connector to insulatively connect the metal transition and the battery cover.
In the implementation process, on the premise of ensuring the insulating connection between the metal transition part and the battery cover plate, the first polymer ensures that the glass connecting piece is isolated from the external environment, so that the corrosion resistance of the glass connecting piece to the external environment is enhanced, and the service life of the battery can be prolonged better.
In one embodiment, the cover plate assembly further comprises a second polymer and a limiting part, the second polymer is sleeved on the extending part and is arranged above the battery cover plate and the glass connecting piece, and the second polymer is used for matching with the glass connecting piece to be in insulation connection with the metal transition part and the battery cover plate; spacing portion sets up in second polymer top, spacing portion and metal transition portion fixed connection, metal transition portion and utmost point post fixed connection.
In the implementation process, on the premise of ensuring the insulating connection between the metal transition part and the battery cover plate, the second polymer ensures that the glass connecting piece is isolated from the external environment, so that the corrosion resistance of the glass connecting piece to the external environment is enhanced, and the service life of the battery can be prolonged better.
In one embodiment, the limiting portion is disposed above the battery cover plate in an abutting manner, and the battery cover plate is disposed above the base portion in an abutting manner.
In the implementation process, the air between the limiting part and the battery cover plate is discharged in a mode of abutting against the limiting part and pressing the limiting part above the battery cover plate, so that the glass connecting piece is isolated from the external environment.
In addition, the air between the base and the battery cover plate is exhausted in a mode that the battery cover plate is arranged above the base in a pressing mode, and therefore the glass connecting piece is guaranteed to be isolated from the external environment.
In one embodiment, the restraint portion, the battery cover plate and the glass connector are all in thermal fusion with the second polymer, and the battery cover plate, the glass connector and the base portion are all in thermal fusion with the first polymer.
In the implementation process, air between the base and the battery cover plate is exhausted in a hot melting connection mode, and air between the base and the battery cover plate can be exhausted, so that the glass connecting piece is isolated from the external environment.
In one embodiment, the contact surface of the glass connecting piece and the battery cover plate is provided with a protruding part, and the battery cover plate is provided with a groove part matched with the protruding part.
In the implementation process, the pressure resistance of the battery cover plate is improved by increasing the contact area between the glass connecting piece and the battery cover plate.
In a second aspect, the present application provides a method of manufacturing a cover plate assembly, comprising: placing a battery cover plate, a glass connecting piece and a metal transition part in a mold; heating the mold to the melting point of the glass so as to integrally package the battery cover plate and the metal transition part; removing the mold to extract a package formed by the insulated and hermetically connected metal transition and battery cover plates by the glass connector; and sleeving the packaging part on the pole column so as to connect the metal transition part and the pole column into a whole.
In the implementation process, the metal transition part and the battery cover plate are connected in an insulating and airtight mode through the glass connecting piece, the glass connecting piece cannot age along with the change of time, and therefore the long-time air tightness between the metal transition part and the battery cover plate is guaranteed.
In addition, the packaging sequence of the cover plate assembly is adjusted to ensure that the production can be carried out through the existing assembly production line, so that the condition of increasing equipment investment is avoided.
In one embodiment, the method of sleeving the package on the pole to connect the metal transition part and the pole into a whole includes: and sequentially sleeving the first polymer and the packaging part on the pole.
In the implementation process, the first polymer ensures that the glass connecting piece is isolated from the external environment, so that the corrosion resistance of the glass connecting piece to the external environment is enhanced, and the service life of the battery can be prolonged better.
In one embodiment, after the encapsulating member is sleeved on the pole, so that the metal transition part and the pole are connected into a whole, the manufacturing method further comprises: sleeving the second polymer and the limiting part on the pole in sequence; and welding the limiting part, the metal transition part and the pole into a whole by utilizing a laser welding process.
In the implementation process, the second polymer ensures that the glass connecting piece is isolated from the external environment, so that the corrosion resistance of the glass connecting piece to the external environment is enhanced, and the service life of the battery can be prolonged better.
In a third aspect, the present application provides a battery comprising: the cover plate assembly of any one of the first aspect and the housing, the cover plate assembly being disposed above the housing.
In the above implementation, the airtightness of the battery is ensured by the cap plate assembly of any one of the first aspects.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a vertical cross-sectional view of a prior art cover plate assembly;
FIG. 2 is a vertical cross-sectional view of a cover plate assembly provided by an embodiment of the present application;
FIG. 3 is a vertical cross-sectional view of another cover plate assembly provided by an embodiment of the present application;
FIG. 4 is a vertical cross-sectional view of another cover plate assembly provided by an embodiment of the present application;
fig. 5 is a flowchart of a method for manufacturing a cover plate assembly according to an embodiment of the present disclosure.
Icon: 110-pole; 111-an extension; 112-a base; 120-a battery cover plate; 130-a first polymer; 140-a second polymer; 150-a third polymer; 160-a limiting part; 170-glass connectors; 180-metal transition.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Various embodiments and aspects of the disclosure will be described with reference to details discussed below, and the accompanying drawings will illustrate the various embodiments. The following description and drawings are illustrative of the present application and are not to be construed as limiting the present application. Numerous specific details are described to provide a thorough understanding of various embodiments of the present application. However, in certain instances, well-known or conventional details are not described in order to provide a brief discussion of embodiments of the present application.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
Unless defined otherwise, technical or scientific terms used herein should have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Referring to fig. 1, fig. 1 is a vertical sectional view of a cover plate assembly in the prior art. The cap plate assembly includes a battery cap plate 120 and terminals, and the battery cap plate 120 may be fixed to the top of a battery case, which may contain electricity, gas, or other substances. In addition, the terminal may be fixed to the battery cap plate 120, and the terminal may include a positive terminal and a negative terminal.
In addition, as shown in fig. 1, the terminal includes a pole 110, a first polymer 130, a second polymer 140, a third polymer 150, and a position-limiting portion 160, wherein the first polymer 130 and the third polymer 150 are sequentially sleeved on the extension portion 111 of the pole 110, the battery cover 120 is sleeved on the outer side of the third polymer 150, and the second polymer 140 and the position-limiting portion 160 are sequentially sleeved on the battery cover 120.
However, in the structure of the cap plate assembly in fig. 1, since the polymer is an organic material and is easily aged over time or after being heated, moisture in the air is easily permeated into the battery from the contact position of the third polymer 150 and the battery cap plate 120, and the introduced moisture may react with electrolyte, gas or other substances in the battery, thereby reducing the performance of the battery, and meanwhile, the battery may be strongly corroded, thereby causing a safety hazard. Therefore, there is a need for a cap plate assembly, a battery, and a method of manufacturing the cap plate assembly.
Referring to fig. 2, fig. 2 is a vertical sectional view of a cover plate assembly according to an embodiment of the present application. This apron subassembly includes: the electrode post 110, the glass connector 170, the battery cover plate 120 and the metal transition part 180; the metal transition part 180 is sleeved on the pole 110, and the inner wall of the metal transition part 180 is attached to the outer wall of the pole 110; a glass connector 170 is disposed between the outer wall of the metal transition part 180 and the battery cover plate 120, and the glass connector 170 serves to insulate and hermetically connect the metal transition part 180 and the battery cover plate 120.
In this embodiment, it should be noted that the glass connector 170 in the embodiment of the present application may also be referred to as a sealing glass, a glass intermediate member, and the like, and the embodiment of the present application is not limited thereto. The glass connector 170 can insulate the metal transition part 180 from the battery cover plate 120, and can ensure airtightness at the contact surface between the metal transition part 180 and the glass connector 170, and correspondingly, can also ensure airtightness at the contact surface between the glass connector 170 and the battery cover plate 120.
It should be understood that the metal transition portion 180 in the embodiment of the present application may also be referred to as a metal connector or a metal connecting piece, and the embodiment of the present application is not limited thereto. The metal transition part 180 may be regarded as a part of the terminal post 110, in this case, the terminal post 110 may be referred to as a first part of the terminal post 110 in fig. 2, the metal transition part 180 may be referred to as a second part of the terminal post 110, and the first part and the second part together form the terminal post 110 of the battery, which is not limited in the embodiment of the present application.
In addition, the pole post 110 includes a base 112 and an extension 111 extending from the base 112, and the metal transition part 180 may be sleeved on the extension 111. In addition, the inner wall of the metal transition part 180 and the outer wall of the extension part 111 are attached, so that no gap exists between the metal transition part 180 and the extension part 111, and the air tightness between the metal transition part 180 and the extension part 111 is ensured. The metal transition portion 180 is also used for electrically conductive connection with the extension portion 111.
In addition, a glass connector 170 is disposed between the metal transition part 180 and the battery cover plate 120, and the glass connector 170 can connect the metal transition part 180 and the battery cover plate 120 by means of hot-melt connection, so that the metal transition part 180 and the battery cover plate 120 are hermetically connected by the glass connector 170.
In addition, due to factors such as the insulating property of the glass itself and the non-contact between the battery cover plate 120 and the metal transition part 180, the metal transition part 180 and the battery cover plate 120 are connected in an insulating manner by the glass connection member 170.
In addition, in addition to the glass connector 170 disposed between the metal transition portion 180 and the battery cover plate 120, a glass connector 170 capable of contacting with one side of the metal transition portion 180 may be disposed below the battery cover plate 120 and the glass connector 170, that is, the vertical cross-section of the glass connector 170 is "L" shaped on one side of the central axis of the pole 110.
It should be understood that the "L" shaped glass may be formed integrally, or may be formed by two annular glass structures, and the embodiment of the present invention is not limited thereto.
It should be understood that, besides the "L" shaped glass shown in the present embodiment, a glass connector 170 capable of being sleeved on the extension portion 111 may be disposed below the battery cover plate 120, the glass connector 170 and the metal transition portion 180, which is not limited in the present application.
In addition, the metal transition part 180 may be flush with the top surface of the glass connection member 170, and may also be flush with the top surface of the battery cover plate 120, but the embodiment of the present application is not limited thereto.
It should be understood that fig. 1 only illustrates the pole post 110, the glass connector 170 and the metal transition part 180 as being symmetrical about the vertical axis of the pole post 110, and in practical applications, the shape of the glass connector 170 and the shape of the metal transition part 180 may match the shape of the pole post 110 or correspond to the shape of the pole post 110, for example, the extension part 111 is a cylindrical structure, the glass connector 170 may be a circular ring, and accordingly, the glass connector 170 may also be a circular ring. For another example, the extension 111 is square, and accordingly, the glass connector 170 may be a hollow column with a square cross section, but the embodiment of the present invention is not limited thereto.
Additionally, it is of course understood that while FIG. 2 illustrates one embodiment of a cover plate assembly, one skilled in the art may also provide a metal transition 180 and a glass attachment 170 as desired. For example, according to an embodiment of the present application, a glass connector 170 that can be sleeved on the extension portion 111 can be further disposed above the battery cover plate 120, the glass connector 170, and the metal transition portion 180; according to another embodiment of the present application, the metal transition portion 180 may further extend from the lower end of the glass connector 170 to the top end of the glass connector 170, i.e. the metal transition portion 180 may also be flush with the top surface of the extension 111 of the post 110; according to an embodiment of the present invention, in the case that the glass connector 170 is replaced with ceramic, a layer of metal may be sintered on the inner and outer walls of the ceramic at a high temperature in advance, and then the ceramic may be thermally fused with the metal transition part 180 and the battery cover plate 120, which is not limited in this application.
In addition, the material types of the terminal post 110, the glass connector 170, the battery cover plate 120 and the metal transition part 180 can be set by those skilled in the art according to actual requirements, for example, according to an embodiment of the present application, the material of the terminal post 110 can be aluminum or copper; according to another embodiment of the present application, the glass connector 170 may be made of glass or glass composite; according to another embodiment of the present application, the material of the battery cover plate 120 may be aluminum or aluminum alloy; according to another embodiment of the present disclosure, the material of the metal transition portion 180 may be aluminum or an aluminum alloy, which is not limited in the present disclosure.
With the cover plate assembly of this embodiment of the present application, the insulating and hermetic connection of the metal transition part 180 and the battery cover plate 120 is achieved by the glass connection member 170, and the glass connection member 170 is less susceptible to aging with time with respect to a polymer, thereby ensuring long-term airtightness between the metal transition part 180 and the battery cover plate 120.
In one embodiment, as shown in fig. 3, fig. 3 is a vertical cross-sectional view of another cover plate assembly provided by an embodiment of the present application. The pole post 110 includes a base 112 and an extension 111 extending from the base 112, the cover plate assembly further includes a first polymer 130, the first polymer 130 is disposed on the base 112, and the battery cover plate 120, the glass connector 170 and the metal transition part 180 are all disposed above the first polymer 130, the first polymer 130 is used for matching with the glass connector 170 to insulatively connect the metal transition part 180 and the battery cover plate 120.
In this embodiment, if the extension portion 111 of the pole 110 and the glass connector 170 are directly coupled, the glass connector 170 and the battery cover 120 are also required to be thermally fused to ensure airtightness, and in this case, the polymer 1 cannot be inserted.
In addition, if the first polymer 130 is put in, the first polymer 130 is damaged during the glass melting process due to the difference in the sealing temperature between the glass and the first polymer 130, and thus the airtightness between the metal transition part 180 and the base part 112 cannot be ensured. For example, according to an embodiment of the present disclosure, when the terminal post 110 and the battery cover 120 are made of aluminum, the melting point of the aluminum is about 560 degrees, and the sealing temperature of the first polymer 130 is required to be lower than 150 degrees, so that the first polymer 130 may be damaged during the glass melting process.
In addition, the above-mentioned thermal melting process may also cause oxidation of the electrode post 110, and since the lower surface of the electrode post 110 is in contact conduction with the inside of the battery, if there is an oxide layer on the lower surface of the electrode post 110, the problem of poor conductivity may also be caused.
Therefore, in the case of the cap plate assembly having the first polymer 130, it is necessary to change the structure of the battery cap plate 120, i.e., to avoid various problems caused by the direct coupling of the extension 111 of the post 110 and the glass connector 170, through the metal transition part 180.
In addition, the first polymer 130 can isolate the glass connector 170 from the external environment, and avoids weak acid reaction generated by the reaction of water, sulfur dioxide and carbon dioxide, so that the corrosion resistance of glass to the external environment is increased, and the service life of the battery can be prolonged better.
In addition, it is understood that, although fig. 3 illustrates an embodiment of a cover plate assembly, the first polymer 130 may be disposed or replaced according to actual needs by those skilled in the art, for example, according to an embodiment of the present application, the first polymer 130 may be replaced by a rubber ring; according to another embodiment of the present application, the first polymer 130 may be further disposed under the battery cover plate 120 and the glass connection member 170, and one side of the first polymer 130 is in contact with one side of the metal transition part 180, which is not limited in the present application.
In addition, the material type of the first polymer 130 can be set by those skilled in the art according to practical requirements, for example, according to an embodiment of the present application, the first polymer 130 can be a sealing resin of polytetrafluoroethylene or epoxy resin, which is not limited in the present application.
With the aid of the cover plate assembly according to the embodiment of the present application, on the premise of ensuring the insulating connection between the metal transition portion 180 and the battery cover plate 120, the first polymer 130 ensures that the glass connector 170 is isolated from the external environment, so that the corrosion resistance of the glass connector 170 to the external environment is enhanced, and the battery life can be better prolonged.
In one embodiment, as shown in fig. 4, fig. 4 is a vertical cross-sectional view of another cover plate assembly provided by an embodiment of the present application. The cover plate assembly further comprises a second polymer 140 and a limiting part 160, the second polymer 140 is sleeved on the extension part 111, the second polymer 140 is arranged above the battery cover plate 120 and the glass connecting piece 170, and the second polymer 140 is used for being matched with the glass connecting piece 170 to be in insulated connection with the metal transition part 180 and the battery cover plate 120; the limiting part 160 is arranged above the second polymer 140, the limiting part 160 is fixedly connected with the metal transition part 180, and the metal transition part 180 is fixedly connected with the pole 110.
In this embodiment, the second polymer 140 can isolate the glass connector 170 from the external environment, and prevent the reaction of water, sulfur dioxide and carbon dioxide to generate a weak acid reaction, thereby increasing the corrosion resistance of the glass to the external environment, and further prolonging the battery life.
Furthermore, it is of course understood that although fig. 4 illustrates an embodiment of a cover plate assembly, the first polymer 130 and the second polymer 140 may be arranged or replaced according to actual requirements by those skilled in the art, for example, according to an embodiment of the present application, the first polymer 130 may be replaced with a glass connector 170 on the basis of the cover plate assembly illustrated in fig. 4; according to another embodiment of the present application, the second polymer 140 may be replaced with a glass connector 170 on the basis of the cap assembly shown in fig. 4; according to another embodiment of the present application, the second polymer 140 may be replaced with a rubber ring on the basis of the cover plate assembly shown in fig. 4, which is not limited in the present application.
In addition, the material type of the second polymer 140 can be set by those skilled in the art according to actual requirements, for example, according to an embodiment of the present application, the second polymer 140 can be a sealing resin of polytetrafluoroethylene or epoxy resin; according to another embodiment of the present application, where the first polymer 130 is polytetrafluoroethylene, the second polymer 140 may be polytetrafluoroethylene; in the case where the first polymer 130 is polytetrafluoroethylene, the second polymer 140 is an epoxy-based sealing resin, which is not limited in the present application.
With the aid of the cover plate assembly according to the embodiment of the present application, on the premise of ensuring the insulating connection between the metal transition portion 180 and the battery cover plate 120, the second polymer 140 ensures that the glass connector 170 is isolated from the external environment, so that the corrosion resistance of the glass connector 170 to the external environment is enhanced, and the battery life can be better prolonged.
In one embodiment, the position-limiting portion 160 is disposed above the battery cover 120 in a pressing manner, and the battery cover 120 is disposed above the base 112 in a pressing manner.
In this embodiment, the position-limiting portion 160 may be disposed above the battery cover 120 in a pressing manner by physical placement, so as to exhaust air between the position-limiting portion 160 and the battery cover 120, thereby ensuring that the glass connection member 170 is isolated from the external environment.
In addition, the battery cover plate 120 can be disposed above the base 112 by being pressed by physical placement, so that air between the base 112 and the battery cover plate 120 is exhausted to ensure that the glass connection member 170 is isolated from the external environment.
With the cover plate assembly of the embodiment of the present application, air between the position-limiting portion 160 and the battery cover plate 120 is exhausted by pressing the position-limiting portion 160 against the battery cover plate 120, so as to ensure that the glass connection member 170 is isolated from the external environment.
In one embodiment, the retention feature 160, the battery cover plate 120, and the glass connector 170 are all thermally fused to the second polymer 140, and the battery cover plate 120, the glass connector 170, and the base 112 are all thermally fused to the first polymer 130.
In this embodiment, the stopper 160, the battery cover plate 120, the glass connector 170, and the metal transition 180 may be thermally fused to the second polymer 140, and the battery cover plate 120, the glass connector 170, the base 112, and the metal transition 180 may be thermally fused to the first polymer 130.
With the cover plate assembly of this embodiment of the present application, the stopper portion 160, the battery cover plate 120, and the glass connector 170 may be provided by means of a thermal fusion connection, so that air between the stopper portion 160 and the battery cover plate 120 is discharged, and air between the base 112 and the battery cover plate 120 is also discharged.
In addition, the hot melting connection mode can ensure that the cover plate structure still keeps stable under the condition that the battery is impacted by the outside.
In one embodiment, the contact surface of the glass connector 170 with the battery cover plate 120 is provided with a protrusion portion, and the battery cover plate 120 is provided with a groove portion engaged with the protrusion portion.
It should be understood that the shape of the protruding portion and the groove portion may be set according to actual requirements, for example, the protruding portion may be a hook disposed on the contact surface of the glass connection member 170 with the battery cover plate 120, and correspondingly, the groove portion may be an arc surface matched with the protruding portion, but the embodiment of the present application is not limited thereto.
With the cap plate assembly of this embodiment of the present application, the pressure resistance of the battery cap plate 120 is improved by increasing the contact area between the glass connection member 170 and the battery cap plate 120.
Referring to fig. 5, fig. 5 is a flowchart illustrating a method for manufacturing a cover plate assembly according to an embodiment of the present disclosure. The manufacturing method of the cover plate assembly comprises the following steps:
step 501, the battery cover plate 120, the glass connector 170, and the metal transition part 180 are placed in a mold.
In this step, the battery cover plate 120, the glass connector 170, and the metal transition part 180 may be separately prepared in advance through a mold.
In addition, the battery cover plate 120, the glass connector 170, and the metal transition part 180 may be pretreated, for example, the pretreatment may include cutting the glass connector 170, cleaning the battery cover plate 120, the glass connector 170, and the metal transition part 180, and removing an oxide layer or the like outside the battery cover plate 120, the glass connector 170, and the metal transition part 180.
In addition, the battery cover plate 120, the glass connector 170, and the metal transition part 180 may be placed in a mold, and the glass connector 170 is placed between the battery cover plate 120 and the metal transition part 180, thereby enabling fixation of the battery cover plate 120, the glass connector 170, and the metal transition part 180.
In addition, in the case where the battery cover plate 120, the glass connector 170, and the metal transition part 180 are placed in a mold, an adhesive layer (e.g., glue, etc.) may be further applied to both contact surfaces of the glass connector 170, which are in contact with the battery cover plate 120 and the metal transition part 180, respectively, so that the battery cover plate 120, the glass connector 170, and the metal transition part 180 can be fixed.
Step 502, the mold is heated to the melting point of the glass to encapsulate the battery cover plate 120 and the metal transition portion 180 as a whole.
In this step, the mold may be placed in a nitrogen atmosphere, heated to a high temperature of 400 to 500 ℃ for 20 to 40 minutes to melt the glass connector 170, thereby integrally encapsulating the battery cover plate 120 and the metal transition part 180.
In addition, it is understood that, although relevant process parameters (such as temperature, heating time, etc.) are specifically exemplified in this step, those skilled in the art may set the process parameters according to actual requirements, and this application is not limited thereto.
At step 503, the mold is removed to extract the package formed by the insulated and hermetically sealed connection of the metal transition part 180 and the battery cover plate 120 by the glass bond 170.
In this step, the heated mold may be previously cooled to room temperature, for example, the heated mold may be left in a normal temperature environment for 30 minutes.
In addition, the mold may be removed to remove the package in the mold, which may be formed of the metal transition part 180 and the battery cover plate 120 thermally fused by the glass connector 170.
Step 504, the package is sleeved on the electrode post 110, so that the metal transition portion 180 and the electrode post 110 are connected into a whole.
In this step, the package can be sleeved on the pole post 110 based on a through hole reserved on the package and adapted to the extending portion 111 of the pole post 110, so that the metal transition portion 180 and the pole post 110 are connected into a whole.
By means of the manufacturing method of this embodiment of the present application, the insulating and hermetic connection of the metal transition part 180 and the battery cover plate 120 is achieved by the glass connection part 170, and the glass connection part 170 does not deteriorate with time, thereby ensuring long-term airtightness between the metal transition part 180 and the battery cover plate 120.
In addition, the structure and the packaging sequence of the cover plate assembly are adjusted to ensure that the assembly line can be used for production, so that the condition of increasing equipment investment is avoided.
In addition, the strength of the packaging part is dozens of times of that of a polymer, and the pressure resistance can reach more than 25 kilograms, so that the safety of the battery can be ensured under the condition that the battery is impacted by external force.
In addition, the air tightness of the packaging part reaches 1 x 10-8Pa.m3/s, the air tightness of the battery can be ensured for more than 10 years, and the battery can be ensured not to leak battery liquid.
In one embodiment, the step of sleeving the package on the terminal post 110 to integrally connect the metal transition part 180 and the terminal post 110 includes: the first polymer 130 and the package are sequentially sleeved on the pole 110.
In this embodiment, the annular first polymer 130 may be sleeved on the pole 110 before the encapsulation is sleeved, but it is understood that the first polymer 130 may also be laid on the base 112 of the pole 110 by way of tiling, which is not limited in this application.
In addition, it is of course understood that the first polymer 130 may be disposed or replaced by a person skilled in the art according to actual needs, for example, according to an embodiment of the present application, the first polymer 130 may be replaced by a glass connector 170, and the glass connector 170 and a package are sleeved on the pole 110, which is not limited by the present application, and the following description of the second polymer 140 is similar and will not be repeated.
By means of the manufacturing method of the embodiment of the present application, the first polymer 130 ensures that the glass connector 170 is isolated from the external environment, thereby enhancing the corrosion resistance of the glass connector 170 to the external environment and better prolonging the battery life.
In one embodiment, after the encapsulation is sleeved on the pole post 110 to integrally connect the metal transition part 180 and the pole post 110, the manufacturing method further includes: the second polymer 140 and the limiting part 160 are sleeved on the pole 110 in sequence; the limiting part 160, the metal transition part 180 and the pole 110 are welded into a whole by a laser welding process.
In this embodiment, the position-limiting portion 160 is disposed on the battery cover 120 in a pressing manner, and the battery cover 120 is disposed on the base 112 in a pressing manner.
In addition, after the second polymer 140 and the position-limiting part 160 are sleeved on the pole 110, the position-limiting part 160 and the battery cover 120 are respectively fused with the second polymer 140, and the battery cover 120 and the base 112 are respectively fused with the first polymer 130. For example, according to an embodiment of the present disclosure, after the second polymer 140 and the position-limiting part 160 are sleeved on the pole 110, the cover assembly is heated to 150 to 280 ℃, so that the position-limiting part 160, the battery cover 120, the glass connector 170, and the metal transition part 180 can be respectively thermally fused with the second polymer 140, and the battery cover 120, the base 112, the glass connector 170, and the metal transition part 180 can also be respectively thermally fused with the first polymer 130.
In addition, it is understood that, although the hot-melting temperature of the polymer is specifically exemplified in the embodiment, it should be understood by those skilled in the art that the hot-melting temperature of the polymer may also be set according to actual needs, and the present application is not limited thereto.
By means of the manufacturing method of the embodiment of the present application, the second polymer 140 ensures that the glass connector 170 is isolated from the external environment, thereby enhancing the corrosion resistance of the glass connector 170 to the external environment and prolonging the battery life.
In addition, the oxide layer on the surface of the metal transition part 180 can be eliminated by the laser welding process.
The present application provides a battery, comprising: the cover plate assembly and the shell in any one of the figures 2 to 4, the cover plate assembly is arranged above the shell, the cover plate assembly and the shell are connected to form a sealed cavity, and the sealed cavity can be filled with electric liquid, gas or other substances.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (3)
1. A cover plate assembly, comprising: the battery comprises a pole, a glass connecting piece, a battery cover plate, a metal transition part, a first polymer, a second polymer and a limiting part;
The metal transition part is sleeved on the pole, and the inner wall of the metal transition part is attached to the outer wall of the pole;
the glass connecting piece is arranged between the outer wall of the metal transition part and the battery cover plate and is used for insulating and hermetically connecting the metal transition part and the battery cover plate;
the battery cover plate, the glass connecting piece and the metal transition part are all arranged above the first polymer and are in hot-melt connection with the first polymer, and the first polymer is used for being matched with the glass connecting piece to be in insulation connection with the metal transition part and the battery cover plate;
the second polymer is arranged above the battery cover plate and the glass connecting piece, the battery cover plate, the glass connecting piece and the metal transition part are in hot-melt connection with the second polymer, and the second polymer is used for being matched with the glass connecting piece to be in insulation connection with the metal transition part and the battery cover plate;
the limiting part is arranged above the second polymer and fixedly connected with the metal transition part;
the pole comprises a base and an extension extending from the base, the first polymer being disposed on the base;
The second polymer is sleeved on the extension part; the metal transition part is fixedly connected with the pole;
the limiting part is arranged above the battery cover plate in an abutting mode, and the battery cover plate is arranged above the base in an abutting mode;
the limiting part, the battery cover plate and the glass connecting piece are all connected with the second polymer in a hot melting mode, and the battery cover plate, the glass connecting piece and the base are all connected with the first polymer in a hot melting mode.
2. The cover plate assembly according to claim 1, wherein a protrusion portion is provided on a contact surface of the glass connection member with the battery cover plate, and the battery cover plate is provided with a groove portion engaged with the protrusion portion.
3. A battery, comprising: the cover assembly and housing of any of claims 1-2, the cover assembly being disposed over the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910220856.2A CN109841766B (en) | 2019-03-22 | 2019-03-22 | Cover plate assembly, battery and manufacturing method of cover plate assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910220856.2A CN109841766B (en) | 2019-03-22 | 2019-03-22 | Cover plate assembly, battery and manufacturing method of cover plate assembly |
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| CN109841766A CN109841766A (en) | 2019-06-04 |
| CN109841766B true CN109841766B (en) | 2022-06-10 |
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| CN111584371B (en) * | 2020-05-25 | 2022-04-01 | 苏州融睿电子科技有限公司 | Manufacturing method of packaging shell and packaging shell |
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| CN201383504Y (en) * | 2009-04-16 | 2010-01-13 | 西安华泰有色金属实业有限责任公司 | Sealing insulator for high-capability lithium battery |
| CN102347512A (en) * | 2011-09-27 | 2012-02-08 | 力神迈尔斯动力电池系统有限公司 | Large-capacity lithium ion battery |
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| CN207977356U (en) * | 2018-01-08 | 2018-10-16 | 无锡凯帕德瑞科技有限公司 | A kind of lithium ion battery and its upper cover |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201397827Y (en) * | 2009-04-03 | 2010-02-03 | 西安华泰有色金属实业有限责任公司 | Sealing insulator for lithium batteries |
| US10541391B2 (en) * | 2015-09-30 | 2020-01-21 | Apple Inc. | Electrical feedthroughs for battery housings |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201383504Y (en) * | 2009-04-16 | 2010-01-13 | 西安华泰有色金属实业有限责任公司 | Sealing insulator for high-capability lithium battery |
| JP2012033339A (en) * | 2010-07-29 | 2012-02-16 | Daiwa Kasei Co Ltd | Large scale lithium ion battery for motor vehicle, dwelling house, and industrial apparatus |
| CN102347512A (en) * | 2011-09-27 | 2012-02-08 | 力神迈尔斯动力电池系统有限公司 | Large-capacity lithium ion battery |
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