CN114464896B - Battery assembly method and battery - Google Patents
Battery assembly method and battery Download PDFInfo
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- CN114464896B CN114464896B CN202210124377.2A CN202210124377A CN114464896B CN 114464896 B CN114464896 B CN 114464896B CN 202210124377 A CN202210124377 A CN 202210124377A CN 114464896 B CN114464896 B CN 114464896B
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- Prior art keywords
- positive electrode
- insulating
- cover plate
- negative electrode
- battery
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000003780 insertion Methods 0.000 claims abstract description 19
- 230000037431 insertion Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims 1
- 238000012797 qualification Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 238000003825 pressing Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000012212 insulator Substances 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 238000009421 internal insulation Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application provides a battery assembly method and a battery, wherein the battery assembly method comprises the following steps: taking the positive electrode end of the positive electrode lug of the battery cell as an insertion end, inserting the battery cell into the shell from a first socket of the shell, exposing the positive electrode lug of the battery cell to a second socket which is arranged opposite to the first socket, and exposing the negative electrode lug of the battery cell to the first socket; the positive electrode lug is electrically connected with a positive electrode cover plate; the positive electrode cover plate is sealed and connected with the second socket; the first socket is sealed and connected with the cathode cover plate. According to the assembly method of the battery, in the process of taking the positive electrode end of the positive electrode lug of the battery core as the insertion end to insert into the shell, the positive electrode lug is not easy to deform and damage due to the fact that the mechanical strength of the positive electrode lug is greater than that of the negative electrode lug, so that the use reliability of the positive electrode lug is guaranteed, the use safety of the battery is improved, and the qualification rate of products is improved.
Description
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a method for assembling a battery and a battery.
Background
The lithium ion battery has the advantages of light weight, large energy storage, large power, no pollution, long service life, small self-discharge coefficient, wide temperature application range and the like, is gradually favored by people, and gradually replaces other traditional batteries in the fields of energy storage and power batteries.
The prior battery generally comprises a battery cell, a shell, a cover plate and an insulating film, wherein the insulating film is firstly used for wrapping the battery cell in the battery assembly process, then the battery cell is inserted into a containing cavity of the shell, and because the insulating film is made of a flexible material and the shell is made of a rigid material, when the battery cell is placed in the shell, the shell cuts and rubs the insulating film at the insertion end of the battery, so that the insulating performance of the insulating film at the insertion end is reduced, the internal insulation of the battery is easy to cause a problem, and the risk of short circuit of the battery is higher.
Disclosure of Invention
The purpose of the application is to provide an assembly method of a battery with high assembly reliability, high qualification rate, good internal insulation and high safety and the battery.
To achieve the above object, an embodiment of a first aspect of the present application provides a method for assembling a battery, including: the method comprises the following steps:
taking the positive electrode end of the positive electrode lug of the battery cell as an insertion end, inserting the battery cell into the shell from a first socket of the shell, exposing the positive electrode lug of the battery cell to a second socket which is arranged opposite to the first socket, and exposing the negative electrode lug of the battery cell to the first socket;
the positive electrode lug is electrically connected with a positive electrode cover plate;
the positive electrode cover plate is sealed and connected with the second socket;
the assembly method further comprises the steps of:
after the battery cell is inserted into the shell, the method further comprises the following steps:
and the sealing cover at the first socket is connected with the negative electrode cover plate.
Compared with the prior art, the technical scheme has the following advantages:
the positive lug is generally made of an aluminum material, the negative lug is generally made of a copper material, and the aluminum material is poorer than the copper material in ductility, so that the thickness of the positive lug made of the aluminum material is larger than that of the negative lug made of the copper material, namely the mechanical strength of the positive lug is larger than that of the negative lug, and the positive lug is not easy to deform and damage when the positive end of the battery cell is used as an insertion end to be inserted into the shell, thereby ensuring the use reliability of the positive lug, improving the use safety of the battery and improving the qualification rate of the product.
Embodiments of the second aspect of the present application provide a battery comprising: the shell is of a hollow structure, and a first socket and a second socket are respectively arranged at two ends of the shell, which are correspondingly arranged; the battery cell is arranged in the shell and comprises a positive electrode end provided with a positive electrode lug, a negative electrode end provided with a negative electrode lug and a side surface, wherein the positive electrode end and the negative electrode end are positioned at two opposite ends of the battery cell, and the side surface is respectively connected with the positive electrode end and the negative electrode end; the insulating film wraps the side surface and extends to the positive electrode end and the negative electrode end respectively; the insulating bracket is at least arranged on the positive electrode end and is connected with the insulating film; the negative electrode cover plate is connected with the shell, seals the first socket and is provided with a negative electrode column connected with the negative electrode lug; the positive electrode cover plate is connected with the shell, seals the second socket and is provided with a positive electrode post connected with the positive electrode lug; the insulating support is sleeved on the pole or is located between the pole and the end portion, the pole comprises the positive pole and the negative pole, and the end portion comprises the positive pole and the negative pole.
Compared with the prior art, the technical scheme has the following advantages:
in the process of inserting the battery core wrapped with the insulating film into the shell, the insulating support is in preferential contact with the shell, so that the situation that the insulating performance of the insulating film is reduced due to the fact that the shell scrapes the insulating film is avoided, namely, the insulativity of the inside of the assembled battery is ensured, the probability of short circuit in the battery is reduced, and the use safety of the battery is improved; in addition, because the insulating support compresses tightly the insulating film, the insulating film is more firmly wrapped on the battery core, so that the condition that the insulating film is loose in the assembly process is avoided, the insulating film has a good insulating effect, the probability of short circuit inside the battery is reduced, the use safety of the battery is improved, and the qualification rate of products is improved.
Drawings
The following drawings are only for purposes of illustration and explanation of the present application and are not intended to limit the scope of the present application. Wherein:
fig. 1 is a flowchart of a first embodiment of a method of assembling a battery as described herein;
FIG. 2 is a flow chart of a second embodiment of a method of assembling a battery as described herein;
fig. 3 is a flow chart of a third embodiment of a method of assembling a battery as described herein;
fig. 4 is a schematic structural view of the battery of the present application;
fig. 5 is an exploded structural view of a first embodiment of the battery shown in fig. 4;
fig. 6 is an exploded view of a second embodiment of the battery shown in fig. 4;
fig. 6a is a partial cross-sectional view of a first embodiment of the battery shown in fig. 4;
fig. 6b is a partial cross-sectional view of a second embodiment of the battery shown in fig. 4;
fig. 7 is an exploded structural view of a third embodiment of the battery shown in fig. 4;
fig. 7a is a partial cross-sectional view of a third embodiment of the battery shown in fig. 4;
fig. 7b is a partial cross-sectional view of a fourth embodiment of the battery shown in fig. 4;
fig. 8 is an exploded structural view of a fourth embodiment of the battery shown in fig. 4;
fig. 9 is an exploded structural view of a fifth embodiment of the battery shown in fig. 4;
fig. 10 is a schematic structural view of a first embodiment of an insulating support described herein;
fig. 11 is an exploded structural view of a sixth embodiment of the battery shown in fig. 4;
fig. 12 is a schematic structural view of a second embodiment of an insulating holder according to the present application.
Reference numerals illustrate:
10. a housing; 11. a first socket; 12. a second socket; 20. a battery cell; 21. a positive electrode tab; 22. a negative electrode ear; 23. a positive terminal; 24. a negative terminal; 30. an insulating film; 40. an insulating support; 41. a through hole; 42. a pressing plate; 43. a gap; 51. a positive electrode cover plate; 52. a negative electrode cover plate; 53. a positive electrode post; 54. a negative electrode column; 61. a first insulating member; 62. a second insulating member; 100. and a battery.
Detailed Description
The present application is further described in detail below by way of the accompanying drawings and examples. The features and advantages of the present application will become more apparent from the description.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other. The following discussion provides various embodiments of the present application. Although each embodiment represents a single combination of applications, different embodiments of the application may be substituted or combined, and therefore the application is also considered to include all possible combinations of the same and/or different embodiments described. Thus, if one embodiment comprises A, B, C and another embodiment comprises a combination of B and D, then the present application should also be considered to include embodiments comprising one or more of all other possible combinations comprising A, B, C, D, although such an embodiment may not be explicitly recited in the following. In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the method for assembling a battery provided in an embodiment of the first aspect of the present application includes the steps of:
step S11, the positive electrode end of the positive electrode lug of the battery cell is taken as an insertion end, the battery cell is inserted into the shell from the first socket of the shell, the positive electrode lug of the battery cell is exposed to the second socket which is arranged opposite to the first socket, and the negative electrode lug of the battery cell is exposed to the first socket.
And S12, electrically connecting the positive cover plate at the positive lug.
And S13, sealing the cover plate of the positive electrode to the second socket.
And S14, sealing the cover plate of the negative electrode at the first socket.
According to the assembly method, the positive electrode lug is generally made of an aluminum material, the negative electrode lug is generally made of a copper material, and the aluminum material is poorer than the copper material in ductility, so that the thickness of the positive electrode lug made of the aluminum material is greater than that of the negative electrode lug made of the copper material, namely the mechanical strength of the positive electrode lug is greater than that of the negative electrode lug, and the positive electrode lug is not easy to deform or damage when being inserted into the shell by taking the positive electrode end of the positive electrode lug of the battery as an insertion end, so that the use reliability of the positive electrode lug is guaranteed, the use safety of the battery is improved, and the qualification rate of a product is improved.
It should be understood by those skilled in the art that the above-mentioned sequence of steps is only one specific embodiment of the present application, and the step of "sealing the cap of the negative electrode at the first socket" may be performed at any position after step S11, and specifically, the method of assembling the battery may further include the steps of:
step S11, the positive electrode end of the positive electrode lug of the battery cell is taken as an insertion end, the battery cell is inserted into the shell from the first socket of the shell, the positive electrode lug of the battery cell is exposed to the second socket which is arranged opposite to the first socket, and the negative electrode lug of the battery cell is exposed to the first socket.
And S12, sealing the cover plate of the negative electrode at the first socket.
And S13, electrically connecting the positive cover plate at the positive lug.
And S14, sealing the cover plate of the positive electrode to the second socket.
Alternatively, the method of assembling a battery may further include the steps of:
step S11, the positive electrode end of the positive electrode lug of the battery cell is taken as an insertion end, the battery cell is inserted into the shell from the first socket of the shell, the positive electrode lug of the battery cell is exposed to the second socket which is arranged opposite to the first socket, and the negative electrode lug of the battery cell is exposed to the first socket.
And S12, electrically connecting the positive cover plate at the positive lug.
And S13, sealing the cover plate of the negative electrode at the first socket.
And S14, sealing the cover plate of the positive electrode to the second socket.
As shown in fig. 2, in one embodiment of the present application, the following steps are further included before the battery cells are inserted into the housing:
and coating an insulating film outside the battery cell.
The first insulating support is connected to the insertion end of the battery cell, and the first insulating support is connected with the insulating film.
The method for assembling the battery comprises the following specific steps:
step S21, coating an insulating film on the outer part of the battery cell.
Step S22, connecting a first insulating support at the insertion end of the battery cell, and connecting the first insulating support with the insulating film.
Step S23, the positive electrode end of the positive electrode lug of the battery cell is taken as an insertion end, the battery cell is inserted into the shell from the first socket of the shell, the positive electrode lug of the battery cell is exposed to the second socket which is arranged opposite to the first socket, and the negative electrode lug of the battery cell is exposed to the first socket.
Step S24, electrically connecting a positive electrode cover plate at the positive electrode lug;
and S25, sealing the cover plate of the positive electrode to the second socket.
And S26, sealing the cover plate of the negative electrode at the first socket.
In the process of inserting the battery core wrapped with the insulating film into the shell, the first insulating support is in preferential contact with the shell, so that the situation that the insulating performance of the insulating film is reduced due to the fact that the shell scratches the insulating film is avoided, namely, the insulativity of the inside of the assembled battery is ensured, the probability of short circuit in the battery is reduced, and the use safety of the battery is improved; in addition, because the first insulating support compresses tightly the insulating film, the insulating film is more firmly wrapped on the battery core, so that the condition that the insulating film is loose in the assembly process is avoided, the insulating film has a good insulating effect, the probability of short circuit inside the battery is reduced, the use safety of the battery is improved, and the qualified rate of products is improved.
As shown in fig. 3, in one embodiment of the present application, before the battery cell is inserted into the housing, the following steps are further included:
and connecting a second insulating bracket at the negative electrode end of the negative electrode lug of the battery cell, and connecting the second insulating bracket with the insulating film.
The negative electrode cover plate is connected with a first insulating part, a negative electrode column is arranged on the negative electrode cover plate, and at least part of the first insulating part is positioned between the negative electrode column and the negative electrode cover plate.
And electrically connecting the negative pole column of the negative pole cover plate with the negative pole lug.
The first insulating member is connected to the insulating film.
The method for assembling the battery comprises the following specific steps:
step S30, coating an insulating film on the outer part of the battery cell.
Step S31, connecting a first insulating support at the insertion end of the battery cell, and connecting the first insulating support with the insulating film.
And S32, connecting a second insulating bracket at the negative electrode end of the negative electrode lug of the battery cell, and connecting the second insulating bracket with the insulating film.
Step S33, a first insulating member is connected to the negative electrode cover plate.
And S34, electrically connecting the negative pole column of the negative pole cover plate with the negative pole lug.
Step S35, connecting the first insulating member with the insulating film.
Step S36, the positive electrode end of the positive electrode lug of the battery cell is taken as an insertion end, the battery cell is inserted into the shell from the first socket of the shell, the positive electrode lug of the battery cell is exposed to the second socket which is arranged opposite to the first socket, and the negative electrode lug of the battery cell is exposed to the first socket.
And S37, electrically connecting the positive cover plate at the positive lug.
Step S38, the positive electrode cover plate is sealed and connected to the second socket.
And S39, sealing the cover plate of the negative electrode at the first socket.
Before the electric core inserts the casing, earlier be connected negative pole apron and negative pole ear electricity to fix the negative pole apron at the negative pole end, avoided the electric core to insert the casing after, at the in-process of installing the negative pole apron owing to receive the restriction of casing and influence the assembly efficiency of negative pole apron, thereby guaranteed the packaging efficiency of battery, improved the production efficiency of product.
In one embodiment of the present application, the length of the positive electrode tab is greater than the length of the negative electrode tab.
Before the battery cell is inserted into the shell, the negative electrode cover plate is connected with the negative electrode lug, the operation space is relatively large in the process without being influenced by other structures, and the connection between the negative electrode cover plate and the negative electrode lug is simple, so that the length of the negative electrode lug only needs to ensure the connection reliability of the negative electrode cover plate; after the battery cell is inserted into the shell, a part of the positive electrode lug is positioned in the shell and is limited by the shell in the process of installing the positive electrode cover plate, so that the positive electrode lug needs to have a longer length to ensure the connection reliability of the positive electrode lug and the positive electrode cover plate.
It will be appreciated by those skilled in the art that the order of steps in the above-described method of assembling a battery is merely a few specific embodiments of the present application, and that those skilled in the art may adjust the corresponding order of steps according to specific requirements.
As shown in fig. 4 and 5, the battery provided by the embodiment of the second aspect of the present application includes: the battery cell comprises a casing 10, a battery cell 20, an insulating film 30, an insulating bracket 40, a negative electrode cover plate 52 and a positive electrode cover plate 51.
The casing 10 is of a hollow structure, and a first jack 11 and a second jack 12 are respectively arranged at two ends of the casing 10 correspondingly.
The battery cell 20 is arranged in the shell 10, the battery cell 20 comprises a positive electrode end 23 provided with a positive electrode lug 21, a negative electrode end 24 provided with a negative electrode lug 22 and side surfaces, the positive electrode end 23 and the negative electrode end 24 are positioned at two opposite ends of the battery cell 20, and the side surfaces are respectively connected with the positive electrode end 23 and the negative electrode end 24.
The insulating film 30 wraps around the side surfaces and extends to the positive electrode terminal 23 and the negative electrode terminal 24, respectively.
The insulating holder 40 is provided at least on the positive electrode terminal 23 and is connected to the insulating film 30. In one embodiment of the present application, the insulating film 30 is thermally fused to the insulating support 40.
The negative electrode cover plate 52 is connected with the casing 10 and seals the first socket 11, and a negative electrode post 54 connected with the negative electrode tab 22 is provided on the negative electrode cover plate 52.
The positive electrode cover plate 51 is connected with the housing 10 and seals the second socket 12, and a positive electrode post 53 connected with the positive electrode tab 21 is provided on the positive electrode cover plate 51.
As shown in fig. 6a, 7a and 7b, the insulating support 40 is sleeved on the pole or the insulating support 40 is located between the pole and the end, the pole comprises a positive pole 53 and a negative pole 54, and the end comprises a positive pole 23 and a negative pole 24.
In the process of assembling the battery 100, the battery core 20 is wrapped by the insulating film 30, then the battery core 20 is inserted into the accommodating cavity of the shell 10, because the insulating film 30 is made of a flexible material and the shell 10 is made of a rigid material, when the battery core 20 is arranged in the shell 10, the insulating film 30 at the insertion end of the battery core 20 is scratched by the shell 10, so that the insulating property of the insulating film 30 at one end of the inserted shell is reduced.
In addition, since the insulating support 40 compresses the insulating film 30, the insulating film 30 is more firmly wrapped on the battery core 20, so that the condition that the insulating film 30 is loose in the assembly process is avoided, the insulating film 30 has a good insulating effect, the probability of short circuit inside the battery 100 is reduced, and the use safety of the battery 100 is improved.
Several embodiments of the insulating support arrangement are specifically described below with reference to the accompanying drawings.
Example 1
As shown in fig. 6, an insulating support 40 is disposed on the positive electrode terminal 23, the insulating support 40 is not disposed on the negative electrode terminal 24, a first insulating member 61 is disposed between the negative electrode terminal 24 and the negative electrode cover plate 52, as shown in fig. 6b, 7a and 7b, at least part of the first insulating member 61 is disposed between the negative electrode post 54 and the negative electrode cover plate 52, and the insulating film 30 is fixedly connected with the first insulating member 61; specifically, the first insulator 61 is fixed to the negative electrode cap plate 52, the positive electrode cap plate 51 is connected to the insulating holder 40, and the first insulator 61 is connected to the insulating film 30. In one embodiment of the present application, the insulating film 30 is wrapped around the first insulating member 61, or the first insulating member 61 is pressed against the insulating film 30. In addition, the insulating film 30 is thermally fused to the first insulator 61. In the process of assembling the battery 100, after the battery cell 20 is completely inserted into the case 10, the positive electrode cover plate 51 is covered on the case 10, and the insulating support 40 is connected with the positive electrode cover plate 51, and the insulating support 40 is detachably connected or fixedly connected with the positive electrode cover plate 51. The positive electrode cover plate 51 and the insulating holder 40 are separate two members.
After the battery core 20 is completely inserted into the casing 10, the first insulating member 61 on the negative electrode cover plate 52 is pressed against the insulating film 30, the positive electrode cover plate 51 is connected with the insulating support 40, and the insulating film 30 is more firmly wrapped on the battery core 20 by the first insulating member 61, so that the condition that the insulating film 30 is loose in the assembly process is avoided, the insulating film 30 has a good insulating effect, the probability of short circuit inside the battery 100 is reduced, and the use safety of the battery 100 is improved.
In a specific embodiment of the present application, as shown in fig. 7, the positive electrode terminal 23 is provided with a second insulating member 62, specifically, a second insulating member 62 is provided between the insulating support 40 and the positive electrode cover plate 51, as shown in fig. 7a and 7b, at least part of the second insulating member 62 is located between the positive electrode post 53 and the positive electrode cover plate 51, and the second insulating member 62 is connected to the insulating support 40, that is, insulating members are provided on both the positive electrode cover plate 51 and the negative electrode cover plate 52.
After the battery cell 20 is completely inserted into the casing 10, the first insulating member 61 is pressed against the insulating film 30, the second insulating member 62 is detachably connected with the insulating support 40, and the first insulating member 61 and the second insulating member 62 enable the insulating film 30 to be more firmly wrapped on the battery cell 20, so that the condition that the insulating film 30 is loose in the assembly process is avoided, the insulating film 30 has a good insulating effect, the probability of short circuit inside the battery 100 is reduced, and the use safety of the battery 100 is improved.
Example two
As shown in fig. 8, the positive electrode terminal 23 and the negative electrode terminal 24 are provided with insulating holders 40, that is, the battery 100 includes two insulating holders 40, and the positive electrode cap plate 51 is connected to the positive electrode tab 21. In the process of assembling the battery 100, after the battery cell 20 is completely inserted into the case 10, the positive electrode cover plate 51 is covered on the case 10, and the insulating support 40 is connected with the positive electrode cover plate 51, and the insulating support 40 is detachably connected or fixedly connected with the positive electrode cover plate 51. The positive electrode cover plate 51 and the insulating holder 40 are separate two members.
After the battery cell 20 is wrapped by the insulating film 30, the two insulating supports 40 are respectively pressed on the insulating film 30 of the positive electrode end 23 or the negative electrode end 24 of the battery cell 20, then the insertion end of the battery cell 20 is inserted into the shell 10, after the battery cell 20 is completely inserted into the shell 10, the positive electrode cover plate 51 is covered on the second socket of the shell 10 and is detachably connected or fixedly connected with the insulating supports 40, so that the insulating film 30 is more firmly wrapped on the battery cell 20, loose condition of the insulating film 30 in the assembly process is avoided, the insulating film 30 has good insulating effect, the probability of short circuit inside the battery 100 is reduced, and the use safety of the battery 100 is improved.
As shown in fig. 9, in a specific embodiment of the present application, the second insulating members 62 are disposed between the insulating support 40 and the positive electrode cover plate 51 and the negative electrode cover plate 52, that is, the battery 100 further includes two second insulating members 62, at least part of the second insulating members 62 are located between the electrode post and the cover plate, the cover plate includes the positive electrode cover plate 51 and the negative electrode cover plate 52, the two second insulating members 62 are disposed on the positive electrode cover plate 51 and the negative electrode cover plate 52, the electrode post includes the positive electrode post 53 and the negative electrode post 54, and the second insulating members 62 are connected with the insulating support 40.
After the battery core 20 is completely inserted into the casing 10, the second insulating pieces 62 on the positive electrode cover plate 51 and the negative electrode cover plate 52 are pressed against the insulating support 40, so that the insulating support 40 can better fix the insulating film 30, and the insulating film 30 can be more firmly wrapped on the battery core 20, thereby avoiding the loose condition of the insulating film 30 in the assembly process, enabling the insulating film 30 to have a good insulating effect, reducing the probability of short circuit inside the battery 100, and improving the use safety of the battery 100.
Several embodiments of the insulating support are specifically described below with reference to the accompanying drawings.
Example 1
As shown in fig. 9 and 10, the insulating holder 40 has a plate-like structure, and through holes 41 corresponding to the tabs are provided on the insulating holder 40, and the positive tab 21 is connected to the positive cap plate 51 through the through holes 41.
The insulating support 40 is platy, can make insulating support 40 and the laminating more of the terminal surface of the positive end 23 of electric core 20 to make insulating support 40 and insulating film 30 be connected more inseparable, make insulating film 30 more firm parcel on electric core 20, avoided insulating film 30 to take place loose condition in the assembly process, and then make insulating film 30 play good insulating effect, reduced the probability that battery 100 inside takes place the short circuit, improved battery 100's safety in utilization.
As shown in fig. 5 to 10, in one embodiment of the present application, the thickness H of the insulating holder 40 is 1mm to 25mm in a direction perpendicular to the end face of the positive electrode terminal 23 or the negative electrode terminal 24.
If the thickness of the plate-shaped insulating support 40 is less than 1mm, the thickness of the insulating support 40 is thin, resulting in insufficient overall strength of the insulating support 40 to be easily damaged; if the thickness of the plate-shaped insulating holder 40 is greater than 25mm, the thickness of the insulating holder 40 is thick, resulting in that the entire insulating holder 40 is heavy and occupies a space inside the battery 100 to greatly affect the performance of the battery 100. Therefore, the thickness of the insulating support 40 is within 1mm-25mm, and the insulating support 40 has high structural strength and reasonable space layout inside the battery 100 under the condition of meeting the use requirement of the insulating support 40, thereby ensuring the use performance of the battery 100.
As shown in fig. 5 to 10, in one embodiment of the present application, the width D of the insulating holder 40 is 70% -100% of the width of the end face of the positive electrode terminal 23 or the negative electrode terminal 24 in the direction parallel to the end face of the positive electrode terminal 23 or the negative electrode terminal 24; the length L of the insulating holder 40 is 70% -100% of the length of the end face of the positive electrode terminal 23 or the negative electrode terminal 24 in a direction parallel to the end face of the positive electrode terminal 23 or the negative electrode terminal 24.
If the width of the insulating holder is less than 70% of the width of the end face of the positive electrode terminal 23 or the negative electrode terminal 24, the overall strength of the insulating holder 40 is insufficient, resulting in easy damage of the insulating holder 40; if the width of the insulating holder is greater than 100% of the width of the end face of the positive electrode terminal 23 or the negative electrode terminal 24, the insulating holder 40 occupies a space inside the battery 100, greatly affecting the performance of the battery 100. Therefore, the width of the insulating support is 70% -100% of the width of the end face of the positive electrode end 23 or the negative electrode end 24, and the insulating support 40 has high structural strength under the condition of meeting the use requirement of the insulating support 40, and the space layout inside the battery 100 is reasonable, so that the use performance of the battery 100 is ensured. Similarly, if the length of the insulating support is less than 70% of the length of the end face of the positive electrode terminal 23 or the negative electrode terminal 24, the overall strength of the insulating support 40 is insufficient, resulting in easy damage of the insulating support 40; if the length of the insulating holder is greater than 100% of the length of the end face of the positive electrode terminal 23 or the negative electrode terminal 24, the insulating holder 40 occupies a space inside the battery 100 to greatly affect the performance of the battery 100. Therefore, the length of the insulating support is 70% -100% of the length of the end face of the positive electrode end 23 or the negative electrode end 24, and under the condition that the use requirement of the insulating support 40 is met, the insulating support 40 is high in structural strength, and the space layout inside the battery 100 is reasonable, so that the use performance of the battery 100 is guaranteed.
Example two
As shown in fig. 11 and 12, the insulating support 40 includes two pressing plates 42, both of the pressing plates 42 are fixed on the end face of the positive electrode terminal 23, and a gap 43 is provided between the pressing plates 42, and the tab passes through the gap 43.
The contact area of each pressing plate 42 and the battery cell 20 is smaller, so that the unit area stress between the pressing plates 42 and the end face of the positive electrode end 23 of the battery cell 20 is larger, the pressing plates 42 and the end face of the positive electrode end 23 of the battery cell 20 can be bonded more, namely, the insulating support 40 and the end face of the positive electrode end 23 of the battery cell 20 can be bonded more tightly, the insulating support 40 and the insulating film 30 are connected more tightly, the insulating film 30 is wrapped on the battery cell 20 more firmly, the situation that the insulating film 30 is loose in the assembly process is avoided, the insulating film 30 has a good insulating effect, the probability of short circuit inside the battery 100 is reduced, and the use safety of the battery 100 is improved.
In the description of the present application, the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present application, it is to be noted that unless explicitly specified and defined otherwise.
In the description of the present application, it should be noted that the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. The term "plurality" means two or more, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The present application has been described in connection with the preferred embodiments, but these embodiments are merely exemplary and serve only as illustrations. On the basis of this, many alternatives and improvements can be made to the present application, which fall within the scope of protection of the present application.
Claims (5)
1. A method of assembling a battery, the method comprising the steps of:
taking the positive electrode end of the positive electrode lug of the battery cell as an insertion end, inserting the battery cell into the shell from a first socket of the shell, exposing the positive electrode lug of the battery cell to a second socket which is arranged opposite to the first socket, and exposing the negative electrode lug of the battery cell to the first socket;
the positive electrode lug is electrically connected with a positive electrode cover plate, and a positive electrode post connected with the positive electrode lug is arranged on the positive electrode cover plate;
the positive electrode cover plate is sealed and connected with the second socket;
the assembly method further comprises the steps of:
after the battery cell is inserted into the shell, the method further comprises the following steps:
the sealing cover at the first socket is connected with a negative electrode cover plate;
before the battery cell is inserted into the shell, the method further comprises the following steps:
coating an insulating film outside the battery cell;
the insertion end of the battery core is connected with a first insulating support, the first insulating support is connected with the insulating film at the positive electrode end, and the first insulating support is sleeved on the positive electrode post and the positive electrode lug, or the first insulating support is positioned between the positive electrode post and the positive electrode end and sleeved on the positive electrode lug;
the positive electrode end is provided with a second insulating part, at least part of the second insulating part is arranged between the positive electrode post and the positive electrode cover plate, the second insulating part is connected with the insulating support, and the insulating support is connected with the insulating film;
the positive pole post comprises a cylindrical part and a base, the cylindrical part extends out of the positive pole cover plate, a second through hole for the cylindrical part to pass through is formed in the second insulating part, and at least part of the second insulating part is fixed between the base and the positive pole cover plate.
2. The method of assembling a battery according to claim 1, wherein,
before the battery cell is inserted into the shell, the method further comprises the following steps:
and connecting a second insulating bracket at the negative electrode end of the negative electrode lug of the battery cell, and connecting the second insulating bracket with the insulating film.
3. The method of assembling a battery according to claim 1, wherein,
before the battery cell is inserted into the shell, the method further comprises the following steps:
the negative electrode cover plate is connected with a first insulating part, a negative electrode column is arranged on the negative electrode cover plate, at least part of the first insulating part is positioned between the negative electrode column and the negative electrode cover plate, and the first insulating part is provided with a first through hole for the negative electrode column to pass through;
electrically connecting a negative pole column of the negative pole cover plate with the negative pole lug;
the first insulating member is connected to the insulating film.
4. A method of assembling a battery according to any one of claims 1 to 3,
the length of the positive electrode lug is longer than that of the negative electrode lug.
5. A battery, the battery comprising:
the shell is of a hollow structure, and a first socket and a second socket are respectively arranged at two ends of the shell, which are correspondingly arranged;
the battery cell is arranged in the shell and comprises a positive electrode end provided with a positive electrode lug, a negative electrode end provided with a negative electrode lug and a side surface, wherein the positive electrode end and the negative electrode end are positioned at two opposite ends of the battery cell, and the side surface is respectively connected with the positive electrode end and the negative electrode end;
the insulating film wraps the side surface and extends to the positive electrode end and the negative electrode end respectively;
the insulating bracket is at least arranged on the positive electrode end and is connected with the insulating film;
the negative electrode cover plate is connected with the shell, seals the first socket and is provided with a negative electrode column connected with the negative electrode lug; and
the positive electrode cover plate is connected with the shell, seals the second socket and is provided with a positive electrode post connected with the positive electrode lug;
the insulation support is sleeved on the pole and the pole lug, or is positioned between the pole and the end part and sleeved on the pole lug;
the electrode post comprises the positive electrode post and the negative electrode post, the electrode lug comprises the positive electrode lug and the negative electrode lug, the cover plate comprises the positive electrode cover plate and the negative electrode cover plate, and the end part comprises the positive electrode end and the negative electrode end;
the positive electrode end is provided with the insulating support, the negative electrode end is not provided with the insulating support, a first insulating piece is arranged between the negative electrode end and the negative electrode cover plate, at least part of the first insulating piece is positioned between the negative electrode column and the negative electrode cover plate, and the insulating film is fixedly connected with the first insulating piece;
the positive electrode end is provided with a second insulating part, at least part of the second insulating part is arranged between the positive electrode column and the positive electrode cover plate, the first insulating part is provided with a first through hole for the column part of the negative electrode column to pass through, the second insulating part is provided with a second through hole for the column part of the positive electrode column to pass through, the second insulating part is connected with the insulating support, and the insulating support is connected with the insulating film;
the pole comprises a cylindrical part and a base, the cylindrical part extends out of the cover plate, at least part of the insulating part is fixed between the base and the cover plate, and the insulating part comprises a first insulating part and a second insulating part;
or alternatively;
the positive electrode end and the negative electrode end are both provided with the insulating bracket,
a second insulating part is arranged between the insulating support and the positive electrode cover plate and between the insulating support and the negative electrode cover plate, at least part of the second insulating part is positioned between the pole and the cover plate, the second insulating part is connected with the insulating support, and the insulating support is connected with the insulating film;
the pole comprises a cylindrical part and a base, the cylindrical part extends out of the cover plate, a second through hole for the cylindrical part to pass through is formed in the second insulating part, and at least part of the second insulating part is located between the base and the cover plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210124377.2A CN114464896B (en) | 2022-02-10 | 2022-02-10 | Battery assembly method and battery |
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| CN202210124377.2A CN114464896B (en) | 2022-02-10 | 2022-02-10 | Battery assembly method and battery |
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| JP2013161632A (en) * | 2012-02-03 | 2013-08-19 | Toyota Industries Corp | Power storage device, insulation member for battery, and vehicle |
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| CN103840228A (en) * | 2012-11-27 | 2014-06-04 | 三星Sdi株式会社 | Battery pack |
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| JP2020077526A (en) * | 2018-11-08 | 2020-05-21 | 積水化学工業株式会社 | Storage battery module |
| CN112259795A (en) * | 2020-04-30 | 2021-01-22 | 蜂巢能源科技有限公司 | Battery cell assembling method and battery cell |
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| JP2013161632A (en) * | 2012-02-03 | 2013-08-19 | Toyota Industries Corp | Power storage device, insulation member for battery, and vehicle |
| JP2014038736A (en) * | 2012-08-13 | 2014-02-27 | Toyota Industries Corp | Power storage device |
| CN103840228A (en) * | 2012-11-27 | 2014-06-04 | 三星Sdi株式会社 | Battery pack |
| JP2015191687A (en) * | 2014-03-27 | 2015-11-02 | 株式会社豊田自動織機 | power storage device |
| CN207664078U (en) * | 2017-12-14 | 2018-07-27 | 江苏塔菲尔新能源科技股份有限公司 | A kind of power battery insulation encapsulating structure |
| CN108963177A (en) * | 2018-09-13 | 2018-12-07 | 中兴高能技术有限责任公司 | A kind of lithium battery electric core and lithium battery electric core packet insulate film method |
| JP2020077526A (en) * | 2018-11-08 | 2020-05-21 | 積水化学工業株式会社 | Storage battery module |
| CN112259795A (en) * | 2020-04-30 | 2021-01-22 | 蜂巢能源科技有限公司 | Battery cell assembling method and battery cell |
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| CN114464896A (en) | 2022-05-10 |
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