CN114069118A - Single battery, battery module and battery pack - Google Patents
Single battery, battery module and battery pack Download PDFInfo
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- CN114069118A CN114069118A CN202111336419.0A CN202111336419A CN114069118A CN 114069118 A CN114069118 A CN 114069118A CN 202111336419 A CN202111336419 A CN 202111336419A CN 114069118 A CN114069118 A CN 114069118A
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- Prior art keywords
- tab
- battery
- lead
- shell
- out part
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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 of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
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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 of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
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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 of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- 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 of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
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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 of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filling, Topping-Up Batteries (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses a single battery, a battery module and a battery pack, wherein the single battery comprises a shell, a top cover, a battery core and pouring sealant, the top cover comprises a cover body, pins and a pole column, the pole column penetrates through the cover body, the pins comprise a connecting part and a leading-out part, the connecting part is mutually connected with the leading-out part, the connecting part is connected with the pole column, the cover body is buckled with the shell, and the pins are accommodated in the shell; the battery cell is accommodated in the shell and comprises a body and a lug, and the lug is connected with the leading-out part; the pouring sealant covers the tab and the leading-out part. The pouring sealant can play a certain role in fixing the tab and the lead-out part, so that the possibility of fracture between the tab and the lead-out part is reduced; gaps between the tab and the shell and between the lead-out part and the shell can be reduced or eliminated, the constraint on the tab and the lead-out part is enhanced, the play space of the battery cell in the shell is reduced, and the possibility of the problems of deformation of the lead-out part, dislocation between pole piece layers of the battery cell, tab cracking, short interior caused by contact with the shell and the like is reduced.
Description
Technical Field
The application relates to the technical field of power batteries, in particular to a single battery, a battery module and a battery pack.
Background
In the correlation technique, two pins can be drawn forth usually to monomer battery's top cap, two pins weld with the positive electrode tab and the negative pole ear of electric core respectively, the restraint of electric core and fixed rely on being connected of positive and negative pole ear and pin completely, and have certain clearance between pin and the casing, the restraint of electric core is not enough, the drunkenness space is great, the stability of pin and electric core is not enough, under the operating mode of vibration or impact, on the one hand, the pin easily takes place the deformation or even splits, arouse zero pressure, interior short, the weeping scheduling problem, on the other hand, the easy emergence pole piece layer dislocation of electric core, utmost point ear fracture, lead to interior short scheduling problem with the casing contact, the security performance is not good.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a single battery, can improve the stability of pin and electric core to improve single battery's security performance.
The application also provides a battery module with the single battery.
The application also provides a battery pack with the battery module.
The single battery provided by the embodiment of the first aspect of the application comprises a shell, a top cover, an electric core and a pouring sealant, wherein the top cover comprises a cover body, a pin and a pole, the pole penetrates through the cover body, the pin comprises a connecting part and a leading-out part, the connecting part is mutually connected with the leading-out part, the connecting part is connected with the pole, the cover body is buckled with the shell, and the pin is accommodated in the shell; the battery cell is accommodated in the shell and comprises a body and a lug, and the lug is connected with the leading-out part; the pouring sealant covers the lug and the leading-out part.
The single battery provided by the embodiment of the first aspect of the application has at least the following beneficial effects: the pouring sealant covers the tab and the lead-out part, can play a certain role in fixing, and reduces the possibility of fracture between the tab and the lead-out part; gaps between the tabs and the shell and between the lead-out part and the shell can be reduced or eliminated, the constraint on the tabs and the lead-out part is enhanced, the moving space of the battery cell in the shell is reduced, and the possibility of the problems of deformation of the lead-out part, dislocation between pole piece layers of the battery cell, tab cracking, short interior caused by contact with the shell and the like is reduced, so that the safety performance of the single battery is improved.
In some embodiments of the present application, the potting adhesive fills a gap between the housing and the tab and a gap between the housing and the lead-out portion.
In some embodiments of the present application, the casing is provided with a glue injection hole, and the glue injection hole is used for pouring the pouring sealant into the casing.
In some embodiments of the present application, the glue injection hole is located at a corresponding position of the tab or the lead-out portion.
In some embodiments of the present application, the sealing member is connected to the housing and covers the glue injection hole.
In some embodiments of the application, the casing has been seted up the seal groove, the injecting glue hole is seted up in the tank bottom of seal groove, the sealing member inlays to be located the seal groove.
In some embodiments of the present application, the cover body is provided with a glue injection hole, and the glue injection hole is used for pouring the pouring glue into the casing.
In some embodiments of this application, still include the baffle, the baffle connect in the inner wall of casing reaches the body is close to the tip of utmost point ear, the casing utmost point ear reaches the baffle prescribes a limit to the encapsulating chamber, the casting glue fill in the encapsulating chamber.
The battery module provided by the embodiment of the second aspect of the present application comprises a busbar and a plurality of single batteries provided by any one embodiment of the first aspect of the present application, wherein the plurality of single batteries are sequentially stacked; the busbar is provided with a plurality of busbars which are connected with the pole posts so that the single batteries are electrically connected.
The battery module that this application second aspect embodiment provided has following beneficial effect at least: the adoption can improve the stability of pin and electric core, and the higher battery cell of security performance can improve the security performance of battery module.
The battery pack provided by the embodiment of the third aspect of the present application comprises a box body and the battery module provided by any embodiment of the second aspect of the present application, wherein the battery module is accommodated in the box body.
The battery pack provided by the embodiment of the third aspect of the application has at least the following beneficial effects: the battery module with higher safety performance is adopted, and the safety performance of the battery pack can be improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The present application is further described with reference to the following figures and examples, in which:
fig. 1 is a schematic perspective view of a single battery provided in some embodiments of the first aspect of the present application;
FIG. 2 is a cross-sectional view of section A-A of FIG. 1;
FIG. 3 is a cross-sectional view of section B-B of FIG. 1;
fig. 4 is an exploded schematic view of the unit cell shown in fig. 1;
fig. 5 is a schematic glue injection diagram of the single battery shown in fig. 1;
fig. 6 is a schematic diagram illustrating glue injection of a single battery according to another embodiment of the first aspect of the present application;
fig. 7 is a schematic perspective view of a single battery provided in other embodiments of the first aspect of the present application;
FIG. 8 is a cross-sectional view of section C-C of FIG. 7;
fig. 9 is a cross-sectional view of a C-C section of the unit cell shown in fig. 7 before potting.
Reference numerals:
the battery comprises a shell 100, a glue injection hole 110, a sealing groove 120, a top cover 200, a cover body 210, a pin 220, a connecting portion 221, a leading-out portion 222, a pole column 230, a battery cell 300, a body 310, a pole lug 320, a pouring sealant 400, a sealing element 500, a baffle 600 and a pouring cavity 700.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions referred to, for example, the directions or positional relationships indicated above, below, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
Reference throughout this specification to the description of "one embodiment," "some embodiments," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The single battery provided in the embodiment of the first aspect of the present application includes a casing 100, a top cover 200, a battery cell 300, and a potting adhesive 400, where the top cover 200 includes a cover 210, a pin 220, and a post 230, the post 230 penetrates through the cover 210, the pin 220 includes a connection portion 221 and a lead-out portion 222, the connection portion 221 and the lead-out portion 222 are connected to each other, the connection portion 221 is connected to the post 230, the cover 210 is fastened to the casing 100, and the pin 220 is accommodated in the casing 100; the battery cell 300 is accommodated in the casing 100, the battery cell 300 includes a body 310 and a tab 320, and the tab 320 is connected to the lead-out portion 222; the potting compound 400 covers the tab 320 and the lead-out portion 222.
For example, as shown in fig. 1 to 4, the single battery includes a casing 100, a top cover 200, a battery cell 300 and a potting compound 400, the top cover 200 includes a cover 210, a pin 220 and a post 230, the post 230 penetrates through the cover 210, the pin 220 includes a connection portion 221 and a lead-out portion 222, the connection portion 221 and the lead-out portion 222 are connected with each other, the connection portion 221 is welded to the post 230, the cover 210 is fastened to the casing 100, and the pin 220 is accommodated in the casing 100; the battery cell 300 is accommodated in the casing 100, the battery cell 300 includes a body 310 and a tab 320, and the tab 320 is welded to the lead-out portion 222; the potting compound 400 covers the tab 320 and the lead-out portion 222. The potting adhesive 400 covers the tab 320 and the lead-out portion 222, and can play a certain role in fixing, so that the possibility of fracture between the tab 320 and the lead-out portion 222 is reduced; gaps between the tab 320 and the casing 100 and between the lead-out part 222 and the casing 100 can be reduced or eliminated, the constraint on the tab 320 and the lead-out part 222 is enhanced, the moving space of the battery cell 300 in the casing 100 is reduced, and the possibility of the problems of deformation of the lead-out part 222, dislocation between pole piece layers of the battery cell 300, cracking of the tab 320, internal short caused by contact with the casing 100 and the like is reduced, so that the safety performance of the single battery is improved.
It can be understood that the potting adhesive 400 should be made of an insulating material to prevent the unit cells from being short; the potting adhesive 400 can be made of a material with good thermal conductivity, so that the heat dissipation efficiency of the tab 320 is improved, and the temperature rise of the single battery in the use process is reduced. The connection portion 221 and the pole post 230, and the tab 320 and the lead portion 222 may be welded by laser or other methods.
The potting adhesive 400 fills the gap between the case 100 and the tab 320 and the gap between the case 100 and the lead portion 222.
For example, as shown in fig. 3, the potting adhesive 400 fills the gap between the case 100 and the tab 320 and the gap between the case 100 and the lead-out portion 222, so as to eliminate the moving space between the tab 320 and the lead-out portion 222, fix the tab 320 and the lead-out portion 222 relative to the case 100, further enhance the constraint on the tab 320 and the lead-out portion 222, reduce the play space of the battery cell 300 in the case 100, and reduce the deformation of the lead-out portion 222, the displacement between the pole piece layers of the battery cell 300, the cracking of the tab 320, the internal short caused by the contact with the case 100, and the like, thereby improving the safety performance of the single battery. In addition, if a material with good thermal conductivity is used as the potting adhesive 400, the potting adhesive 400 filled in the gaps between the housing 100 and the tab 320 and between the housing 100 and the lead-out portion 222 can also play a role in improving the heat dissipation efficiency, so that the heat generated at the tab 320 can be quickly conducted to the housing 100, and the heat is conducted and dissipated to the outside through the housing 100, thereby reducing the temperature rise of the single battery in the use process.
The casing 100 is provided with a glue injection hole 110, and the glue injection hole 110 is used for pouring the pouring sealant 400 into the casing 100.
For example, as shown in fig. 5, a glue injection hole 110 is opened on the bottom surface of the casing 100, and the glue injection hole 110 is used for pouring the pouring glue 400 into the casing 100. During production, after the assembly of the shell 100, the top cover 200 and the battery cell 300 is completed, the potting adhesive 400 is poured into the shell 100 through the adhesive pouring hole 110, the operation is simple and convenient, and the production efficiency can be improved.
It is understood that the glue injection hole 110 may be opened on any one side of the housing 100. The number, size, etc. of the glue injection holes 110 are not limited and can be set according to actual requirements.
Note that the glue injection hole 110 is located at a position corresponding to the tab 320 or the lead-out portion 222.
For example, as shown in fig. 2, the glue injection hole 110 is located at a position corresponding to the tab 320 or the lead-out portion 222, and the potting compound 400 can directly cover the tab 320 and the lead-out portion 222 after being injected through the glue injection hole 110, so that the potting efficiency of the potting compound 400 can be improved, and the material waste can be reduced.
Note that, the single battery further includes a sealing member 500, and the sealing member 500 is connected to the case 100 and covers the glue injection hole 110.
For example, as shown in fig. 2 and fig. 3, the single battery further includes a sealing member 500, the sealing member 500 is connected to the housing 100 and covers the glue injection hole 110, so that the pouring sealant 400 that is not completely cured in the production process can be prevented from flowing out of the glue injection hole 110, the sealing performance of the housing 100 can be improved, dust, water vapor and the like can be prevented from entering the single battery from the glue injection hole 110, and the safety performance of the single battery can be ensured.
It is understood that the sealing member 500 may be made of metal, rubber, silicon, etc.
It should be noted that the casing 100 is provided with a sealing groove 120, the glue injection hole 110 is provided at the bottom of the sealing groove 120, and the sealing element 500 is embedded in the sealing groove 120.
For example, as shown in fig. 5, the sealing groove 120 is formed in the housing 100, and the glue injection hole 110 is formed in the groove bottom of the sealing groove 120, referring to fig. 2, the sealing member 500 is embedded in the sealing groove 120, so that the installation and positioning of the sealing member 500 are facilitated, the cleanliness of the housing 100 can be improved, and in addition, the sealing member 500 embedded in the sealing groove 120 is not easily detached due to external scratch, and the sealing performance of the housing 100 can be further ensured.
It will be appreciated that the shape, size, etc. of the seal groove 120 should match the shape, size, etc. of the seal 500.
In other embodiments, the cover 210 defines a glue injection hole 110, and the glue injection hole 110 is used for pouring the pouring sealant 400 into the housing 100.
For example, as shown in fig. 6, the cover 210 has a glue injection hole 110, and the glue injection hole 110 is used for pouring the pouring sealant 400 into the casing 100. During production, after the assembly of the shell 100, the top cover 200 and the battery cell 300 is completed, the potting adhesive 400 is poured into the shell 100 through the adhesive pouring hole 110, the operation is simple and convenient, and the production efficiency can be improved.
It can be understood that the glue injection hole 110 may be disposed at a corresponding position of the tab 320 and the lead-out portion 222, and the glue injection hole 110 may directly cover the tab 320 and the lead-out portion 222 after being injected, so as to improve the injection efficiency of the potting adhesive 400 and reduce material waste. The single battery may further include a sealing member 500, the sealing member 500 being connected to the cover 210 and covering the glue injection hole 110; referring to fig. 6, a sealing groove 120 may be formed on the cover 210, the glue injection hole 110 is formed at the bottom of the sealing groove 120, and the sealing member 500 is embedded in the sealing groove 120.
It should be noted that the single battery further includes a baffle 600, the baffle 600 is connected to the inner wall of the casing 100 and the end portion of the body 310 close to the tab 320, the casing 100, the tab 320 and the baffle 600 define a potting cavity 700, and the potting adhesive 400 is filled in the potting cavity 700.
For example, as shown in fig. 7 and 8, the single battery further includes a baffle 600, the baffle 600 is connected to the inner wall of the casing 100 and the end of the body 310 near the tab 320, referring to fig. 9, the casing 100, the tab 320 and the baffle 600 define a potting cavity 700, and the potting compound 400 is filled in the potting cavity 700. The baffle 600 can limit the potting adhesive 400 in the potting adhesive cavity 700, and prevent the potting adhesive 400 from overflowing to the space between the body 310 and the inner wall of the housing 100 while ensuring that the potting adhesive 400 covers the tab 320 and the lead-out portion 222, thereby reducing the waste of the potting adhesive 400.
It is understood that the baffle 600, the housing 100 and the body 310 may be provided as three separate parts, or the baffle 600 and the housing 100 may be integrally formed.
It should be noted that, two tabs 320 are disposed on both sides of the body 310, two pins 220 are disposed, the lead-out portions 222 are bent relative to the connection portion 221 in a direction away from the cover 210, one of the lead-out portions 222 is welded to the tab 320 on one side of the body 310, and the other lead-out portion 222 is welded to the tab 320 on the other side of the body 310.
For example, as shown in fig. 1 to 4, two tabs 320 are disposed on both sides of the body 310, two pins 220 are disposed, the lead-out portions 222 are bent relative to the connecting portion 221 in a direction away from the cover 210, one of the lead-out portions 222 is welded to the tab 320 on one side of the body 310, and the other lead-out portion 222 is welded to the tab 320 on the other side of the body 310, so that the structural layout is reasonable. During installation, the two lead-out parts 222 are respectively aligned to the lugs 320 on the two sides of the body 310 and welded, so that the welding space is large, the operation is convenient, and the production efficiency can be improved.
It can be understood that, in the case that the tabs 320 are disposed on both sides of the body 310, a plurality of glue injection holes 110 should be disposed on the casing 100 or the cover 210, and the glue injection holes 110 are respectively disposed on the tabs 320 or the two lead-out portions 222 on both sides of the body 310.
The single cell provided in the first aspect of the present application is described below with reference to fig. 1 to 5 as a complete example, and it should be understood that the following scheme is only an example and is not to be construed as a limitation of the present application.
The single battery includes a casing 100, a top cover 200, a battery cell 300, a potting adhesive 400, and two sealing members 500.
The top cap 200 includes a cap body 210, two pins 220 and two poles 230, the two poles 230 all penetrate through the cap body 210, the pins 220 include a connection portion 221 and a lead-out portion 222, the connection portion 221 and the lead-out portion 222 are connected to each other, the two connection portions 221 are welded to the two poles 230 in a one-to-one correspondence manner, the cap body 210 is fastened to the housing 100, and the pins 220 are accommodated in the housing 100.
The battery cell 300 is accommodated in the casing 100, the battery cell 300 includes a body 310 and two tabs 320, the two tabs 320 are respectively connected to two sides of the body 310, and the tabs 320 are welded to the lead-out portion 222.
The bottom of the casing 100 is provided with two sealing grooves 120, the bottom of each sealing groove 120 is provided with a glue injection hole 110, one glue injection hole 110 corresponds to the tab 320 on one side of the body 310, and the other glue injection hole 110 corresponds to the tab 320 on the other side of the body 310.
The potting compound 400 fills gaps between the case 100 and the tab 320, and between the case 100 and the lead-out portion 222.
The two sealing members 500 are connected to the housing 100 and embedded inside the two sealing grooves 120 in a one-to-one correspondence.
The production process includes injecting the potting adhesive 400 into the casing 100 through the two adhesive injection holes 110 after the casing 100, the top cover 200 and the battery cell 300 are assembled, so that the potting adhesive 400 is filled in gaps between the casing 100 and the tabs 320 and between the casing 100 and the lead-out portion 222, and then installing the sealing element 500 in the sealing groove 120. After the potting adhesive 400 is completely cured, the tab 320 and the lead-out portion 222 can be fixed to a certain extent, and the possibility of fracture between the tab 320 and the lead-out portion 222 is reduced; gaps between the tab 320 and the casing 100 and between the lead-out part 222 and the casing 100 can be reduced or eliminated, the constraint on the tab 320 and the lead-out part 222 is enhanced, the moving space of the battery cell 300 in the casing 100 is reduced, and the possibility of the problems of deformation of the lead-out part 222, dislocation between pole piece layers of the battery cell 300, cracking of the tab 320, internal short caused by contact with the casing 100 and the like is reduced, so that the safety performance of the single battery is improved.
The battery module provided by the embodiment of the second aspect of the present application includes a busbar and a plurality of single batteries provided by any embodiment of the first aspect of the present application, and the plurality of single batteries are stacked in sequence; the busbar is provided in plurality, and the plurality of busbars are connected to the post 230 so that the plurality of unit batteries are electrically connected.
The adoption can improve the stability of pin and electric core, and the higher battery cell of security performance can improve the security performance of battery module.
The battery pack provided by the embodiment of the third aspect of the present application includes a case and the battery module provided by any embodiment of the second aspect of the present application, and the battery module is accommodated in the case.
The battery module with higher safety performance is adopted, and the safety performance of the battery pack can be improved.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (10)
1. A battery cell, comprising:
a housing;
the top cover comprises a cover body, pins and a pole, the pole penetrates through the cover body, the pins comprise a connecting part and a leading-out part, the connecting part is mutually connected with the leading-out part, the connecting part is connected with the pole, the cover body is buckled with the shell, and the pins are accommodated in the shell;
the battery cell is accommodated in the shell and comprises a body and a lug, and the lug is connected with the leading-out part;
and the pouring sealant is covered on the lug and the leading-out part.
2. The battery cell as claimed in claim 1, wherein the potting adhesive fills a gap between the case and the tab and a gap between the case and the lead-out portion.
3. The single battery of claim 1, wherein the housing is provided with a glue injection hole, and the glue injection hole is used for pouring the pouring sealant into the housing.
4. The single battery according to claim 3, wherein the glue injection hole is located at a corresponding position of the tab or the lead-out portion.
5. The battery cell as recited in claim 3, further comprising a seal member attached to the housing and covering the glue hole.
6. The battery cell as claimed in claim 5, wherein the housing defines a sealing groove, the glue injection hole is disposed at a bottom of the sealing groove, and the sealing member is embedded in the sealing groove.
7. The battery cell as claimed in claim 1, wherein the cover has a glue hole for pouring the potting adhesive into the housing.
8. The battery cell as claimed in claim 1, further comprising a baffle connected to an inner wall of the casing and an end of the body near the tab, wherein the casing, the tab and the baffle define a potting cavity, and the potting adhesive is filled in the potting cavity.
9. Battery module, its characterized in that includes:
the unit cell of any one of claims 1 to 8, which is provided in plurality, a plurality of which are stacked in sequence;
the busbar is provided with a plurality of busbars which are connected with the pole posts so that the single batteries are electrically connected.
10. A battery pack, comprising:
a box body;
the battery module according to claim 9, wherein the battery module is accommodated inside the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111336419.0A CN114069118A (en) | 2021-11-12 | 2021-11-12 | Single battery, battery module and battery pack |
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| CN202111336419.0A CN114069118A (en) | 2021-11-12 | 2021-11-12 | Single battery, battery module and battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937838A (en) * | 2022-06-08 | 2022-08-23 | 孚能科技(赣州)股份有限公司 | Battery core assembly jig, battery core assembly, battery module and battery pack |
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2021
- 2021-11-12 CN CN202111336419.0A patent/CN114069118A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937838A (en) * | 2022-06-08 | 2022-08-23 | 孚能科技(赣州)股份有限公司 | Battery core assembly jig, battery core assembly, battery module and battery pack |
| CN114937838B (en) * | 2022-06-08 | 2023-07-07 | 孚能科技(赣州)股份有限公司 | Battery cell assembly frame, battery cell assembly, battery module and battery pack |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Applicant after: Xinwangda Power Technology Co.,Ltd. Address before: 518000 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Applicant before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |