CN217334242U - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
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- CN217334242U CN217334242U CN202221142481.6U CN202221142481U CN217334242U CN 217334242 U CN217334242 U CN 217334242U CN 202221142481 U CN202221142481 U CN 202221142481U CN 217334242 U CN217334242 U CN 217334242U
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- battery
- hole
- extension
- cover
- cell
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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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Abstract
The utility model provides a battery, which comprises a shell and an electric core; the shell is provided with a battery cell accommodating cavity and an extending part accommodated in the battery cell accommodating cavity; the battery cell is provided with a first through hole, the battery cell is accommodated in the battery cell accommodating cavity, and the extending part is inserted in the first through hole. The utility model discloses a battery can realize the fixed to electric core, and this battery is in the use, and electric core is difficult to take place the drunkenness, has comparatively excellent security performance.
Description
Technical Field
The embodiment of the utility model provides a relate to new forms of energy technical field, especially relate to a battery.
Background
The existing button battery generally comprises a case cover, a casing and a battery cell, wherein the case cover and the casing form a closed accommodating cavity, the battery cell is arranged in the accommodating cavity, and a through hole is formed in the middle of the battery cell and used for enabling a welding pin to penetrate through a welding lug. However, in the use process of the battery, the battery core in the existing button battery is easy to move, and the service life and the safety performance of the battery are affected.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a battery, which has excellent safety performance, and the battery core is not easy to generate play in the using process.
The embodiment of the utility model provides a battery, which comprises a shell and an electric core;
the shell is provided with a battery cell accommodating cavity and an extending part accommodated in the battery cell accommodating cavity;
the battery cell is provided with a first through hole, the battery cell is accommodated in the battery cell accommodating cavity, and the extending part is inserted in the first through hole.
The battery as described above, wherein the first through hole is provided in the axial direction of the cell, and the first through hole is located at the center of the cell.
The battery as described above, wherein the casing includes a casing body and a casing cover, the casing body has a closed end and an open end which are oppositely arranged, the casing body has a cell accommodating cavity, and the casing cover covers the open end;
the extension is located at the housing cover and/or the housing.
The battery as described above, wherein the extension portion is located on the housing cover, and the housing cover further includes a housing cover positive electrode connected to the extension portion;
the extension part is provided with a second through hole in the axial direction, the shell cover anode is provided with a liquid injection hole, and the liquid injection hole is communicated with the second through hole.
The battery as described above, wherein the positive electrode of the case cover further has a counter bore, and the counter bore is surrounded on the liquid injection hole and connected with the liquid injection hole.
The battery as described above, wherein the side wall of the extension has a third through hole.
The battery as described above, wherein the height of the extension portion is smaller than the height of the battery cell.
The battery as described above, wherein the first through hole and the extension part are clearance-fitted, and a distance of the clearance is 0-3 mm.
The battery as described above, wherein the height of the cell is 4-8 mm;
and/or the height of the extension part is 3-7 mm;
and/or the diameter of the first through hole is 1-3 mm;
and/or the diameter of the extension is 0.9-2.9 mm.
The battery as described above, wherein the thickness of the positive electrode of the case cover is 0.1-0.3 mm;
and/or the depth of the counter bore is 0.05-0.25 mm.
The battery as described above, wherein the pour hole is covered with a sealing layer;
the sealing layer is selected from a tin layer and/or an aluminum layer.
The embodiment of the utility model provides a battery, through insert the extension on the battery case and locate the first through-hole of electric core, realize the fixed to electric core, this battery is in the use, and electric core is difficult to take place the drunkenness, has comparatively excellent security performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is easy to see that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a battery according to some embodiments of the present invention;
fig. 2 is a top view of the battery of fig. 1 in accordance with the present invention;
fig. 3 is a cross-sectional view of the battery of fig. 2 taken along line B-B in accordance with the present invention;
fig. 4 is an exploded view of a battery according to some embodiments of the present invention;
fig. 5 is a schematic structural view of a housing according to some embodiments of the present invention;
fig. 6 is a schematic view of a partial structure of a battery according to some embodiments of the present invention;
FIG. 7 is a schematic view of a housing cover according to some embodiments of the present invention;
FIG. 8 is a top view of the housing cover of FIG. 7 according to the present invention;
FIG. 9 is a cross-sectional view of the housing cover of FIG. 8 taken along line A-A in accordance with the present invention;
FIG. 10 is an exploded view of a housing cover according to some embodiments of the present invention;
fig. 11 is a schematic structural view of a positive housing cover in some embodiments of the present invention;
fig. 12 is a schematic diagram of welding of a battery according to some embodiments of the present invention.
Description of reference numerals:
1: an electric core;
2: a housing;
3: guide groove
11: a first through hole;
12: a positive tab;
13: a negative tab;
21: a housing;
22: a shell cover;
23: an extension portion;
24: a sealing layer;
211: a closed end;
212: an open end;
221: a shell cover anode;
223: a first insulating layer;
224: a housing cover cathode;
225: a second insulating layer;
2211: a liquid injection hole;
2212: a counterbore.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is a schematic diagram of a battery according to some embodiments of the present invention; fig. 2 is a top view of the battery of fig. 1 in accordance with the present invention; fig. 3 is a cross-sectional view of the battery of fig. 2 taken along line B-B according to the present invention. As shown in fig. 1-3, the present invention provides a battery, which includes a housing 2 and a battery cell 1;
the shell 2 is provided with a battery cell accommodating cavity and an extension part 23 accommodated in the battery cell accommodating cavity;
the battery cell 1 has a first through hole 11, the battery cell 1 is accommodated in the battery cell accommodating cavity, and the extension portion 23 is inserted into the first through hole 11.
It can be understood that the utility model discloses a battery includes shell 2 and holds electric core 1 in the chamber in the electric core of shell 2, and extension 23 of shell 2 is inserted and is located the first through-hole 11 of electric core 1, realizes electric core 1 and shell 2's fixed.
The utility model discloses do not specially limit to the position of extension 23 and first through-hole 11, as long as extension 23 can insert and locate first through-hole 11, realize electric core 1 and shell 2 fixed can.
The utility model discloses do not specially limit to the end face shape of extension 23 and the shape of first through-hole 11, as long as extension 23 can insert and locate in first through-hole 11, realize electric core 1 and shell 2 fixed can, for example, extension 23 end face shape and the shape of first through-hole 11 can be circular, square or polygon.
In the use process of the battery with the structure, the battery core 1 is not easy to move, and the service life and the safety performance of the battery are favorably improved.
As shown in fig. 1 to 3, in some embodiments of the present invention, there is a first through hole 11 in the axial direction of the battery cell 1, and the first through hole 11 is located at the center of the battery cell 1.
It can be understood that, when the battery cell 1 has the first through hole 11 in the axial direction, and the first through hole 11 is located at the center of the battery cell 1, the extending portion 23 is disposed corresponding to the battery cell 1, so that the extending portion 23 is inserted into the first through hole 11.
The utility model discloses in, when first through-hole 11 was located electric core 1's center, not only can realize electric core 1 and shell 2's fixed, can also make the welding pin pass for welding utmost point ear can simplify the preparation technology under the fixed circumstances of realization electric core 1 and shell 2.
Fig. 4 is an exploded view of a battery according to some embodiments of the present invention; fig. 5 is a schematic structural view of a housing according to some embodiments of the present invention; fig. 6 is a schematic view of a partial structure of a battery according to some embodiments of the present invention. As shown in fig. 1, 4-6, in some embodiments of the present invention, the housing 2 includes a casing 21 and a cover 22, the casing 21 has a closed end 211 and an open end 212 opposite to each other, the casing 21 has a cell accommodating cavity, and the cover 22 covers the open end 212;
the extension 23 is located at the housing cover 22 and/or the housing 21.
As shown in fig. 4, the battery of the present invention includes a battery cell 1 and a case cover 22 in sequence from the closed end 211 to the open end 212 of the case 21. The battery cell 1 is accommodated in the cell accommodating cavity of the casing 21, the open end 212 is covered and sealed by the casing cover 22, and a sealed cavity is formed between the open end and the casing 21, so that the battery is packaged. The utility model discloses do not restrict the relative position of cap 22 and open end 212, as long as cap 22 can shutoff open end 212 and form sealed cavity with casing 21 can.
As shown in fig. 4, the extension 23 of the present invention may be located on the housing cover 22. As shown in fig. 5 and 6, the extension 23 of the present invention may be located on the housing 21. In some embodiments, the extension 23 may also be located on both the housing cover 22 and the housing 21. The utility model discloses in, when extension 23 was located cap 22 and/or casing 21, not only can realize electric core 1 and shell 2's fixed, still be favorable to realizing casing 21 and cap 22's counterpoint, improved casing 21 and cap 22's welding quality, and then improved the leakproofness of battery.
In the present invention, when the extension 23 is located on the housing cover 22 and/or the housing 21, the extension 23 may or may not have a through hole in the axial direction, and the extension 23 may be solid or hollow. When the extension portion 23 is hollow, it is advantageous to reduce the quality of the battery and to improve the energy density of the battery.
In the present invention, the extension 23 may be located on the housing cover 22 by integral press molding, or the extension 23 may be located on the housing 21 by integral press molding.
The utility model discloses do not do the special limitation to electric core 1, can choose for use electric core 1 commonly used in the field. For example, the battery cell 1 may include a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive electrode sheet and the negative electrode sheet, wherein the positive electrode sheet includes a positive electrode current collector and a positive electrode active layer disposed on at least one functional surface of the positive electrode current collector, and the positive electrode tab 12 is connected to the positive electrode current collector; the negative plate comprises a negative current collector and a negative active layer arranged on at least one functional surface of the negative current collector, and the negative tab 13 is connected with the negative current collector.
The utility model discloses in, positive tab 12 and negative pole ear 13 can be drawn forth from the relative both ends of electric core 1 respectively, and one in positive tab 12 and the negative pole ear 13 is connected with the blind end 211 of casing 21, and another is connected with cap 22. For example, positive tab 12 is connected to housing cover 22 and negative tab 13 is connected to closed end 211 of housing 21. In some embodiments, the portions of the positive electrode tab 12 and the negative electrode tab 13 protruding out of the end surface of the battery cell 1 may be covered with tab glue to prevent the tabs from contacting the casing 2 and causing short circuit.
In some embodiments of the present invention, a welding pin may be used to pass through the first through hole 11 in the center of the battery cell 1, and weld the negative electrode tab 13 to the closed end 211 of the casing 21.
FIG. 7 is a schematic view of a housing cover according to some embodiments of the present invention; FIG. 8 is a top view of the housing cover of FIG. 7 according to the present invention; FIG. 9 is a cross-sectional view of the housing cover of FIG. 8 taken along line A-A in accordance with the present invention;
fig. 10 is an exploded view of a housing cover according to some embodiments of the present invention. As shown in fig. 7-10, in some embodiments of the present invention, the extension 23 is located on the housing cover 22, and the housing cover 22 further includes a housing cover anode 221 connected to the extension 23;
the extending portion 23 has a second through hole in the axial direction, and the case cover positive electrode 221 has a liquid injection hole 2211, the liquid injection hole 2211 communicating with the second through hole.
It can be understood that, in the present invention, the extension portion 23 and the case cover positive electrode 221 are connected to each other, and the second through hole of the extension portion 23 in the axial direction and the liquid injection hole 2211 of the case cover positive electrode 221 are communicated with each other. In the preparation process of the battery, electrolyte can be injected through the injection hole 2211, and the electrolyte enters the electric core accommodating cavity through the injection hole 2211 and the second through hole in sequence and contacts with the electric core 1 in the electric core accommodating cavity, so that the infiltration of the electric core 1 is realized.
When the cover 22 further includes a cover positive electrode 221, one end of the positive tab 12 is interconnected with the positive current collector and the other end is interconnected with the cover positive electrode 221.
As shown in fig. 3, 9-10, in some embodiments of the present invention, the housing cover 22 further comprises a first insulating layer 223, a housing cover cathode 224, and a second insulating layer 225; the first insulating layer 223 is disposed between the cover positive electrode 221 and the cover negative electrode 224, and the second insulating layer 225 is disposed on a surface of the cover negative electrode 224 away from the first insulating layer 223.
The utility model discloses in, the external diameter of first insulation layer 223 is the same with the positive 221 of cap external diameter, and the internal diameter of first insulation layer 223 is the same with cap negative pole 224's internal diameter for prevent to contact each other between the positive 221 of cap and the cap negative pole 224, prevent that short circuit phenomenon from taking place. In some embodiments, the thickness of the first insulating layer 223 is 0.05 to 0.2mm, and the deformation amount of the first insulating layer 223 is 40 to 80%.
The utility model discloses in, the external diameter of cap negative pole 224 is greater than the internal diameter of cap positive pole 221 to the external diameter of cap negative pole 224 is the same with the external diameter of casing 21, and when using cap 22 lid to close shutoff open end 212, cap negative pole 224 can weld with casing 21, is used for realizing that the connection of cap 22 and casing 21 is sealed. The utility model discloses in, the external diameter of second insulating layer 225 is the same with electric core 1's external diameter for prevent that electric core 1 and cap negative pole 224 from contacting, avoid the battery to take place the short circuit.
The utility model discloses in, the internal diameter of cap negative pole 224 is greater than the internal diameter of cap positive pole 221, not only can prevent that cap positive pole 221 and extension 23 from contacting with cap negative pole 224 and causing the short circuit, can reserve out the welding position of anodal ear 12 moreover.
In the present invention, the materials of the first insulating layer 223 and the second insulating layer 225 may be the same or different. In some embodiments, the material of the first insulation layer 223 and/or the second insulation layer 225 may be at least one of Polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinylidene fluoride (PVDF), polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP), Polyamide (PA), Polyimide (PI), or aramid; when the material of the first insulating layer 223 and/or the second insulating layer 225 is aramid, the material of the first insulating layer 223 and/or the second insulating layer 225 may be selected from at least one of meta-aramid (PMIA) or para-aramid (PPTA).
In the utility model, the shell 21 can be a stainless steel shell; the housing cover cathode 224 can be a nickel housing cover cathode or a stainless steel nickel plated housing cover cathode, and the housing cover anode 221 can be an aluminum housing cover anode or an aluminum alloy housing cover anode. The materials of the positive electrode tab 12 and the positive electrode current collector can be the same as those of the shell cover positive electrode 221; the materials of negative electrode tab 13 and negative electrode collector may be the same as the materials of cap negative electrode 224.
Fig. 11 is a schematic structural diagram of a positive electrode of a housing cover according to some embodiments of the present invention. As shown in fig. 11, in some embodiments of the present invention, the positive casing cover electrode 221 further has a counter bore 2212, and the counter bore 2212 is surrounded by the liquid injection hole 2211 and connected to the liquid injection hole 2211.
It can be understood that the housing cover anode 221 of the present invention further has a counter bore 2212 connected to the liquid injection hole 2211, and the counter bore 2212 is surrounded on the periphery of the liquid injection hole 2211. In the preparation process of the battery, when the liquid injection hole 2211 is sealed, the sealing material can cover the surface of the counter bore 2212, so that the volume and the space of the battery can be saved, and the volume energy density of the battery can be further improved.
The shape of the filling hole 2211 is not particularly limited in the present invention, and the shape of the filling hole 2211 may be the same as or different from the shape of the end face of the extension portion 23; the utility model discloses do not do the special restriction to annotate the size of liquid hole 2211, annotate the terminal surface size that liquid hole 2211 can be the same with extension 23, also can be different. In some embodiments, the shape of the injection hole 2211 is the same as the end face of the extension part 23, and the size of the injection hole 2211 is the same as the end face of the extension part 23, which is beneficial to simplifying the battery preparation process and reducing the equipment and material cost.
In some embodiments of the present invention, the side wall of the extension 23 has a third through hole.
The utility model discloses in, extension 23 can include the lateral wall and hold the chamber by the electrolyte that the lateral wall encloses, and when extension 23's lateral wall had the third through-hole, electrolyte can hold the chamber from electrolyte through the third through-hole and permeate to electric core 1, is favorable to making electrolyte fully soak electric core 1, improves the notes liquid yield of battery, and then improves the energy density and the security performance of battery.
The utility model discloses do not specially limit to the shape and the number of third through-hole, as long as can make electrolyte hold the chamber from electrolyte and permeate to electric core 1 can.
In some embodiments of the present invention, the height of the extension portion 23 is less than the height of the battery cell 1.
In the utility model, when the extension part 23 is located on the shell cover 22, the height of the extension part 23 is less than that of the battery cell 1, so that the extension part 23 can be prevented from contacting the closed end 211 of the shell 21, the short circuit of the battery can be avoided, and a part of space is reserved between the extension part 23 and the closed end 211, which is beneficial to more fully soaking the battery cell 1 with electrolyte; when the extension portion 23 is located on the casing 21, the height of the extension portion 23 is smaller than that of the battery cell 1, so that the extension portion 23 can be prevented from contacting the casing cover 22, the battery is prevented from being short-circuited, and a part of space is reserved between the extension portion 23 and the casing cover 22, which is beneficial to enabling electrolyte to more fully soak the battery cell 1.
It is understood that when the extension 23 is located on both the housing cover 22 and the housing 21, the height of the extension 23 refers to the sum of the dimensions of the extension 23 located on the housing cover 22 and the extension 23 located on the housing 21; because the height of extension 23 is less than the height of electric core 1, partial space can be reserved between extension 23 that is located cap 22 and extension 23 that is located casing 21, prevent that two electrically different extensions 23 from contacting each other and taking place the short circuit, be favorable to making electrolyte pass through moreover, and then realize the abundant infiltration of electric core 1.
In some embodiments of the present invention, the first through hole 11 and the extension 23 are clearance-fitted, and the distance of the clearance is 0-3 mm.
It can be understood that, in the utility model, the first through-hole 11 and the extension 23 can have a clearance therebetween, also can closely laminate, and when having a clearance between first through-hole 11 and the extension 23, the size in clearance is less than or equal to 3 mm.
Further, in some embodiments of the present invention, the height of the battery cell 1 is 4-8 mm;
and/or the height of the extension 23 is 3-7 mm.
The battery according with the above parameters can avoid the contact between the extension portion 23 and the closed end 211 of the casing 21 (or the contact between the extension portion 23 and the casing cover 22) under the condition that the battery core 1 and the casing 2 are sufficiently fixed, so as to avoid the short circuit of the battery, and meanwhile, the battery with the above parameters can also enable the electrolyte to fully infiltrate the battery core 1, thereby improving the energy density and the safety performance of the battery.
In some embodiments of the present invention, under the condition of ensuring the normal operation of the battery, the diameter of the first through hole 11 is 1-3mm in order to improve the energy density of the battery.
Since the extension portion 23 of the present invention is inserted into the first through hole 11, it can be understood that the diameter of the extension portion 23 is inevitably smaller than the diameter of the first through hole 11, and further, the diameter of the extension portion 23 is 0.9-2.9 mm. When the diameter of extension 23 satisfies above-mentioned parameter, not only be favorable to better realization electric core 1 and the abundant fixed of shell 2, can avoid extension 23 and electric core 1 contact to cause the damage of electric core 1 moreover.
In some embodiments of the present invention, the thickness of the cap positive electrode 221 is 0.1-0.3mm in order to increase the energy density of the battery while maintaining the life of the battery.
Further, the depth of the counterbore 2212 is 0.05-0.25 mm. When the depth of the counter bore 2212 of the battery meets the parameters, the service life of the battery can be better maintained, and the energy density of the battery can be improved.
Fig. 12 is a schematic diagram of welding of a battery according to some embodiments of the present invention. As shown in fig. 12, in some embodiments of the present invention, the injection hole 2211 is covered by a sealing layer 24;
sealing layer 24 is selected from a tin layer and/or an aluminum layer.
In the present invention, the liquid injection hole 2211 can be sealed by soldering, so that the liquid injection hole 2211 is covered by the sealing layer 24 formed by soldering. In the present invention, the sealing layer may be selected from a tin layer and/or an aluminum layer.
In some embodiments, the soldering specifically comprises: placing the guide groove 3 containing the tin material on the upper surface of the liquid injection hole 2211, so that the opening of the guide groove 3 is opposite to the liquid injection hole 2211; the pour hole 2211 is filled with molten tin material along the opening of the guide groove 3 using an automatic tin soldering machine, and the pour hole 2211 is sealed (i.e., a tin layer is formed on the surface of the pour hole 2211). In the present invention, the aluminum material can be accommodated in the guide groove 3, and the aluminum layer is formed on the surface of the liquid injection hole 2211, referring to the above embodiments.
The utility model discloses do not do the special limitation to the size of sealing layer 24, as long as can realize annotating liquid hole 2211's sealed can. In some embodiments, if the area of the sealing layer 24 is larger than the area of the injection hole 2211, the sealing layer 24 covers the counter bore 2212.
In some embodiments of the present invention, in order to ensure the sealing firmness of the liquid injection hole 2211, the liquid injection hole 2211 may be cleaned by laser before soldering, so as to remove the aluminum oxide layer and the dirt on the surface of the liquid injection hole 2211.
The utility model discloses in, annotate liquid hole 2211 and be covered by sealing layer 24, because the temperature that forms sealing layer 24 is very low (for example, the melting point of tin is less than 300 ℃, the temperature that forms the tin layer is very low), can not exert an influence to first insulating layer 223 and second insulating layer 225 in cap 22, consequently gas pocket, crackle and the scheduling problem that splashes can not appear, are favorable to improving the rate of making of battery, improve the production efficiency of battery. And, the utility model discloses a problem of overwelding and welding through also can not appear in the battery.
The utility model discloses a battery still has compatible big, trades the simple advantage of type.
The preparation process of the battery in some embodiments of the utility model comprises the following steps in sequence:
1) preparing a battery cell 1;
2) shaping the end face of the battery cell 1;
3) placing the cell 1 in the cell accommodating cavity of the casing 21, and welding the negative tab 13 to the closed end 211 of the casing 21;
4) placing the shell cover anode 221, the first insulating layer 223, the shell cover cathode 224 and the second insulating layer 225 in sequence, setting the pressure, the temperature and the pressure maintaining time of the hot press, and combining the shell cover anode 221, the first insulating layer 223, the shell cover cathode 224 and the second insulating layer 225 together to form the shell cover 22;
5) sealing the open end 212 of the case 21 with the case cover 22 such that the extension 23 located at the case cover 22 is inserted into the first through hole 11 of the cell 1 and the second insulating layer 225 is located between the cell 1 and the case cover negative electrode 224, connecting the positive electrode tab 12 and the case cover positive electrode 221 to each other;
6) circumferentially welding the shell cover cathode 224 with the shell 21;
7) electrolyte is injected through the injection hole 2211 on the shell cover 22;
8) the liquid injection hole 2211 is subjected to laser cleaning, and a sealing layer 24 is formed on the surface of the liquid injection hole by using tin welding, so that the liquid injection hole 2211 is sealed to obtain the battery.
In step 3), the closed end 211 and the negative electrode tab 13 may be welded inside the battery cell 1, or the closed end 211 and the negative electrode tab 13 may be welded outside the case 21. The utility model discloses in, the welding can adopt resistance weld or laser welding. When laser welding is used, the welding track of the laser beam can be set under the pressure of inert gas, and the welding track of the laser beam can be a line, a circle, a circular ring or a spiral point. The laser welding has the characteristics that no splashing exists in the welding process, 180-degree tension test is carried out on the negative electrode tab 13 after the laser welding, and the welding tension is more than or equal to 5N.
In the step 5), the positive tab 12 and the cover positive electrode 221 can be connected to each other by laser welding, and the welding track of the laser beam can be set under the pressure of the inert gas, and can be a line, a circle, a ring or a spiral point. The laser welding has the characteristics that no splashing exists in the welding process, 180-degree tension test is carried out on the positive lug 12 after the laser welding, and the welding tension is more than or equal to 5N.
Can be right the utility model provides a battery carries out the inspection of sealing, the utility model discloses a battery is through helium test leakproofness test, and the leak rate is less than 10 -6 mbar.L/s。
It should be noted that the numerical values and numerical ranges mentioned in the description of the present invention are approximate values, and there may be a certain range of errors depending on the manufacturing process and the measurement accuracy, and the error can be considered as negligible by those skilled in the art.
In the description of the present invention, it is to be understood that the terms "top", "bottom", "upper", "lower" (if present), and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (11)
1. The battery is characterized by comprising a shell and a battery cell;
the shell is provided with a battery cell accommodating cavity and an extending part accommodated in the battery cell accommodating cavity;
the battery cell is provided with a first through hole, the battery cell is accommodated in the battery cell accommodating cavity, and the extending part is inserted in the first through hole.
2. The battery of claim 1, wherein the first through hole is provided in an axial direction of the cell, and the first through hole is located at a center of the cell.
3. The battery of claim 1 or 2, wherein the housing comprises a shell body and a shell cover, the shell body is provided with a closed end and an open end which are oppositely arranged, the shell body is provided with a cell accommodating cavity, and the shell cover covers the open end;
the extension is located at the housing cover and/or the housing.
4. The battery of claim 3, wherein the extension is located on the housing cover, the housing cover further comprising a housing cover positive electrode coupled to the extension;
the extension part is provided with a second through hole in the axial direction, the shell cover anode is provided with a liquid injection hole, and the liquid injection hole is communicated with the second through hole.
5. The battery of claim 4, wherein the positive electrode of the case cover is further provided with a counter bore, and the counter bore is surrounded on the liquid injection hole and is connected with the liquid injection hole.
6. The battery of claim 1, wherein the side wall of the extension has a third through hole.
7. The battery of claim 1, wherein the extension has a height that is less than a height of the cell.
8. The battery of claim 1, wherein the first through hole and the extension are clearance fit, the clearance being 0-3mm apart.
9. The battery of claim 8, wherein the height of the cell is 4-8 mm;
and/or the height of the extension part is 3-7 mm;
and/or the diameter of the first through hole is 1-3 mm;
and/or the diameter of the extension is 0.9-2.9 mm.
10. The battery according to claim 5, wherein the thickness of the positive electrode of the case cover is 0.1-0.3 mm;
and/or the depth of the counter bore is 0.05-0.25 mm.
11. The battery according to claim 4 or 10, wherein the pour hole is covered with a sealing layer;
the sealing layer is selected from a tin layer and/or an aluminum layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221142481.6U CN217334242U (en) | 2022-05-12 | 2022-05-12 | Battery with a battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221142481.6U CN217334242U (en) | 2022-05-12 | 2022-05-12 | Battery with a battery cell |
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| CN217334242U true CN217334242U (en) | 2022-08-30 |
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