CN216085054U - Battery case and lithium ion battery - Google Patents
Battery case and lithium ion battery Download PDFInfo
- Publication number
- CN216085054U CN216085054U CN202121504052.4U CN202121504052U CN216085054U CN 216085054 U CN216085054 U CN 216085054U CN 202121504052 U CN202121504052 U CN 202121504052U CN 216085054 U CN216085054 U CN 216085054U
- Authority
- CN
- China
- Prior art keywords
- battery
- lithium ion
- plastic
- ion battery
- cover plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 81
- 239000004033 plastic Substances 0.000 claims abstract description 123
- 229920003023 plastic Polymers 0.000 claims abstract description 123
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- 239000003063 flame retardant Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000009413 insulation Methods 0.000 abstract description 6
- 239000003792 electrolyte Substances 0.000 description 9
- 238000003466 welding Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical group O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- -1 polyoxymethylene Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to the field of batteries, and provides a battery shell and a lithium ion battery. The battery shell comprises a plastic shell and a top cover, wherein the plastic shell is provided with an accommodating cavity which is arranged in an open manner and is used for accommodating the battery core; the top cap closing cap is in the accent that holds the chamber, and the top cap includes the apron and connects in the plastics frame of apron towards plastics casing one side, and plastics frame and plastics casing counterpoint are connected. The battery shell can be accommodated in the battery cell between the plastic shell and the plastic frame in an insulation contact mode, so that the insulating film wrapping the periphery of the battery cell and the insulating supporting sheet arranged on the bottom side of the battery cell, which are required in the prior art, can be at least omitted, the structure of the lithium ion battery can be simplified on the basis of ensuring the safety performance of the lithium ion battery, the manufacturing process of the lithium ion battery can be simplified, and the manufacturing cost of the lithium ion battery can be reduced.
Description
Technical Field
The utility model belongs to the technical field of batteries, and particularly relates to a battery shell and a lithium ion battery.
Background
The battery shell of the existing lithium ion battery is mainly an aluminum shell or a steel shell and has certain conductivity. Therefore, when the battery core of the lithium ion battery is packaged in the battery shell, the periphery of the battery core is wrapped with the insulating film, and the bottom side of the battery core is provided with the insulating support sheet so as to be in insulating contact with the battery shell. The lithium ion battery has a complex structure and complex manufacturing procedures, so that the cost of the lithium ion battery is high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims to provide a battery shell to solve the technical problems of complex structure and complex manufacturing process of the conventional lithium ion battery.
In order to achieve the purpose, the utility model adopts the technical scheme that: a battery housing, comprising:
the plastic shell is provided with an accommodating cavity which is arranged in an open manner and is used for accommodating the battery cell;
the top cap, the closing cap is in the accent that holds the chamber, and the top cap includes the apron and connects in the plastics frame of apron towards plastics casing one side, and plastics frame and plastics casing counterpoint are connected.
By adopting the above scheme, the electric core can be directly accommodated and contacted by the plastic shell which is made of plastic and has insulativity, so that the insulating film which is required to be wrapped on the peripheral side of the electric core and the insulating supporting sheet which is arranged on the bottom side of the electric core in the prior art can be at least omitted, the structure of the lithium ion battery can be simplified to a certain extent, the manufacturing procedure of the lithium ion battery is simplified, and the manufacturing cost of the lithium ion battery is reduced.
By adopting the scheme, more electrolyte can be contained by the plastic shell with certain rigidity, so that the cycle performance of the lithium ion battery is improved, the gas generated by the battery cell in the subsequent use process can be resisted to a certain extent, and the service life of the lithium ion battery can be correspondingly prolonged.
By adopting the scheme, the battery cell can be protected for a long time by the plastic shell which has good mechanical strength, high temperature resistance, low temperature resistance, electrolyte corrosion resistance, water resistance, air permeation resistance, stable property within a certain temperature range (-100 ℃ -260 ℃) and stable structure, so that the service performance of the lithium ion battery can be ensured, and the service life of the lithium ion battery can be prolonged.
By adopting the scheme, the plastic shell with stronger processability can be customized in size according to the size of the battery cell so as to meet different customer requirements; and the grouping rate of the prepared lithium ion battery is higher.
Through adopting above-mentioned scheme, can be arranged in at electric core and hold the chamber after, counterpoint plastics frame and plastic casing towards its one side accurately, the mode such as rethread bonding, welding, butt fusion is connected, and makes basic closing cap of top cap, the sealed accent that holds the chamber, connects conveniently, and it is higher to connect the yield and connect the precision.
By adopting the scheme, the plastic shell and the plastic frame can be lightened, so that the mass ratio of the battery shell to the whole lithium ion battery can be reduced, and the energy density of the lithium ion battery can be improved to a certain extent.
In one embodiment, the cover plate is a metal cover plate; the top cap still sets up and all locates anodal post and the negative pole post on the apron including mutual interval, and wherein, anodal post is connected with the metal covering board electricity, and the negative pole post passes through insulating part and metal covering board insulated joint.
By adopting the above scheme, the accessible is connected with the anodal post of the conductive connection of metal covering plate that has electric conductivity and is realized being connected with the anodal piece utmost point ear electricity of electric core to realize being connected with the negative pole piece utmost point ear electricity of electric core through the negative pole post of the insulating connection of metal covering plate that has electric conductivity, thereby be convenient for realize through anodal post and negative pole post that the electric current between the inside electric core of battery case and the outside electrical equipment is mutual, thereby can ensure and improve lithium ion battery's performance.
In one embodiment, the cover plate is a plastic cover plate.
By adopting the scheme, the plastic cover plate can be further lightened on the basis of lightening the plastic shell and the plastic frame, so that the mass ratio of the battery shell to the whole lithium ion battery can be further reduced, and the energy density of the lithium ion battery can be further improved.
In one embodiment, the top cap further comprises a positive electrode tab and a negative electrode tab which are arranged at intervals and penetrate through the cover plate.
By adopting the scheme, the insulation effect between the positive tab and the plastic cover plate, between the negative tab and the plastic cover plate and between the positive tab and the negative tab can be ensured based on the insulation property of the plastic cover plate, so that the safety performance of the lithium ion battery can be improved; compared with the first embodiment, the present embodiment can omit at least the insulating member, thereby effectively simplifying the structure of the lithium ion battery, simplifying the manufacturing process of the lithium ion battery, and reducing the manufacturing cost of the lithium ion battery.
By adopting the above scheme, the positive tab and the negative tab are not required to be connected with the help of metal flexible connection, namely, the positive tab and the negative tab can be directly connected with the tab of the battery cell, and also can be directly connected with an external test fixture without the help of an external auxiliary pole piece, so as to test and evaluate the performance of the lithium ion battery. Therefore, the structure of the lithium ion battery can be further simplified, the manufacturing procedure of the lithium ion battery can be simplified, and the manufacturing cost of the lithium ion battery can be further reduced.
In one embodiment, the thickness of the positive electrode tab is 0.1-5 mm, and the thickness of the negative electrode tab is 0.1-5 mm.
By adopting the scheme, the overcurrent capacity of the positive electrode tab and the negative electrode tab can be ensured and improved, so that the electrical performance of the lithium ion battery is ensured and improved.
In one embodiment, the positive lug is provided with a positive connecting end arranged on one side of the cover plate close to the accommodating cavity, and the length of the positive connecting end is 4-25 mm; the negative pole ear has and locates the apron and be close to the negative pole link that holds chamber one side, and the length of negative pole link is 4 ~ 25 mm.
By adopting the scheme, the stability and the reliability of the electric connection between the positive electrode connecting end and the positive electrode tab of the battery cell can be effectively guaranteed on the basis of compressing the overall height of the lithium ion battery and guaranteeing the volume utilization rate and the energy density of the lithium ion battery, and the stability and the reliability of the electric connection between the negative electrode connecting end and the negative electrode tab of the battery cell can be effectively guaranteed.
In one embodiment, the plastic housing has flame retardancy.
By adopting the scheme, the flame spread speed can be effectively reduced and even the ignition can be prevented by the plastic shell with flame retardance, so that the safety performance of the lithium ion battery can be effectively improved.
In one embodiment, the plastic housing is a transparent or translucent housing.
By adopting the scheme, the plastic shell can be visualized, and based on the visualization, a user can realize qualitative observation of the free electrolyte amount of the lithium ion battery in the using process, so that the residual cycle life of the lithium ion battery can be conveniently judged.
In one embodiment, the wall thickness of the plastic shell is 0.4-2 mm, and the wall thickness of the plastic frame is greater than or equal to that of the plastic shell.
By adopting the scheme, the plastic shell and the plastic frame can be aligned accurately and adaptively, and the reliable, stable and lasting connection relationship can be established between the plastic shell and the plastic frame.
In one embodiment, the cover plate has a height of 1-3 mm.
By adopting the scheme, the strength and the rigidity of the cover plate can be effectively guaranteed; the height of the cover plate can be regulated and controlled to a certain extent, so that the air pressure resistance value of the explosion-proof valve can be conveniently designed by regulating and controlling the local height of the cover plate, and different explosion-proof requirements can be met.
An object of an embodiment of the present invention is to provide a lithium ion battery, which includes a battery case.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic perspective view of a battery case according to an embodiment of the utility model;
FIG. 2 is a schematic perspective view of the plastic housing provided in FIG. 1;
FIG. 3 is a schematic perspective view of the overcap provided in FIG. 1;
fig. 4 is a schematic perspective view of a top cover according to a second embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
100-plastic shell, 101-containing cavity; 200-top cover, 210-cover plate, 211-metal cover plate, 212-plastic cover plate, 213-liquid injection hole, 220-plastic frame, 230-positive pole, 240-negative pole, 250-positive pole lug, 251-positive pole leading-out terminal, 260-negative pole lug, 261-negative pole leading-out terminal and 270-explosion-proof valve.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The following describes a specific implementation of the present invention in more detail with reference to specific embodiments:
example one
Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the utility model provides a battery casing, which includes a plastic casing 100 and a top cover 200, wherein the plastic casing 100 has an open accommodating cavity 101 for accommodating a battery cell (not shown).
By adopting the above scheme, the plastic shell 100 which is made of plastic and has insulativity can directly accommodate and contact the battery cell, so that the insulating film which is required in the prior art and wraps the periphery of the battery cell and the insulating supporting sheet which is arranged at the bottom side of the battery cell can be at least omitted, the structure of the lithium ion battery can be simplified to a certain extent, the manufacturing procedure of the lithium ion battery is simplified, and the manufacturing cost of the lithium ion battery is reduced.
By adopting the scheme, more electrolyte can be contained by the plastic shell 100 with certain rigidity, so that the cycle performance of the lithium ion battery is improved, the gas generated by the battery cell in the subsequent use process can be resisted to a certain extent, and the service life of the lithium ion battery can be correspondingly prolonged.
By adopting the scheme, the plastic shell 100 which has the advantages of good mechanical strength, high temperature resistance, low temperature resistance, electrolyte corrosion resistance, water resistance, air permeation prevention, stable property within a certain temperature range (-100 ℃ -260 ℃) and stable structure can protect the battery cell for a long time, thereby ensuring the service performance of the lithium ion battery and prolonging the service life of the lithium ion battery.
By adopting the scheme, the plastic shell 100 with stronger processability can be customized according to the size of the battery cell so as to meet different customer requirements; and the grouping rate of the prepared lithium ion battery is higher.
The top cover 200 covers the opening of the accommodating cavity 101, the top cover 200 includes a cover plate 210 and a plastic frame 220 connected to one side of the cover plate 210 facing the plastic housing 100, and the plastic frame 220 is connected to the plastic housing 100 in an aligned manner. The plastic frame 220 is a rectangular frame, and the plastic frame 220 may be pre-connected to the cover plate 210 toward the plastic casing 100 by, but not limited to, riveting, bonding, welding, fusing, integrally connecting, etc., so as to form an integral structure, i.e., the top cover 200, with the cover plate 210.
Based on this, through adopting above-mentioned scheme, can be after electric core is arranged in and hold chamber 101, counterpoint plastics frame 220 and plastic casing 100 towards its one side accurately, and the mode such as rethread bonding, welding, butt fusion is connected, and makes top cap 200 basically the closing cap, the sealed accent that holds chamber 101, connects conveniently, and it is higher to connect the yield and connect the precision. And, the plastic frame 220 may also be in insulated contact with the cell.
By adopting the scheme, the plastic shell 100 and the plastic frame 220 can be lightened, so that the mass ratio of the battery shell to the whole lithium ion battery can be reduced, and the energy density of the lithium ion battery can be improved to a certain extent.
In addition, referring to fig. 1 and fig. 3, in the present embodiment, the lid 210 may be provided with a liquid injection hole 213. After the top cover 200 covers the accommodating chamber 101, the injection of the electrolyte into the accommodating chamber 101 can be conveniently realized based on the injection hole 213, and after the injection, the injection hole 213 can be sealed.
Referring to fig. 1 and 3, in the present embodiment, the top cap 200 may further include an explosion-proof valve 270 disposed on the cover plate 210, and the explosion-proof valve 270 may be used to relieve pressure first when the lithium ion battery expands to a certain extent, so as to slow down or even prevent explosion of the lithium ion battery, thereby improving safety performance of the lithium ion battery.
Referring to fig. 1 and 2, in the present embodiment, the plastic housing 100 is made of at least one of polyimide, teflon, polyoxymethylene, polymethyl methacrylate, polyphenylene sulfide, and polyether ether ketone.
By adopting the above scheme, the temperature resistance range of the plastic shell 100 is-140-240 ℃, which is much higher than the temperature range of the lithium ion battery, and the plastic shell 100 has better electrolyte corrosion resistance, acid and alkali resistance, various organic solvents resistance and other performances, thereby ensuring and improving the performance of the plastic shell 100 and prolonging the service life of the plastic shell 100.
In addition, for some special materials, after the plastic shell 100 reaches a certain temperature, a special gas can be released, and the special gas can be used as a danger early warning signal to be captured and detected by a sensor, so that the auxiliary judgment and warning of whether the lithium ion battery has a thermal runaway risk can be facilitated.
Referring to fig. 1 and 3, in the present embodiment, the cover plate 210 is a metal cover plate 211; the top cover 200 further includes a positive post 230 (aluminum material) and a negative post 240 (copper material) disposed at an interval and disposed on the cover plate 210. The positive electrode post 230 is electrically connected to the metal cover 211, and the negative electrode post 240 is electrically insulated from the metal cover 211 by an insulating member (not shown in the figure, optionally an insulating ceramic member).
The positive pole 230 is electrically connected to the positive tab of the battery cell by a metal flexible connection (optional ultrasonic welding), and the negative pole 240 is also electrically connected to the negative tab of the battery cell by a metal flexible connection (optional ultrasonic welding).
Therefore, by adopting the above scheme, the positive post 230 conductively connected with the metal cover plate 211 with conductivity can be electrically connected with the positive tab of the battery cell, and the negative post 240 conductively connected with the metal cover plate 211 with conductivity can be electrically connected with the negative tab of the battery cell, so that the current interaction between the battery cell inside the battery case and the external electrical equipment can be realized through the positive post 230 and the negative post 240, and the service performance of the lithium ion battery can be ensured and improved.
Referring to fig. 1 and 2, in the present embodiment, the plastic housing 100 has flame retardancy.
In one possible embodiment, the plastic housing 100 may be made to contain a flame retardant component, while the plastic housing 100 may be made flame retardant. Wherein, the mass fraction of the flame-retardant component is preferably 0.2-0.8%. Optionally, the flame retardant substance is antimony trioxide or decabromodiphenylethane.
In another possible embodiment, the plastic housing 100 may be made flame retardant by coating the inner wall of the plastic housing 100 (i.e., the wall of the receiving chamber 101) with a flame retardant coating. Optionally, the material of the flame retardant coating is antimony trioxide or decabromodiphenylethane.
Therefore, by adopting the above scheme, the flame spread speed can be effectively reduced, even the ignition can be prevented, through the plastic shell 100 with flame retardance, and thus the safety performance of the lithium ion battery can be effectively improved.
Referring to fig. 1 and fig. 2, in the present embodiment, the plastic casing 100 is a transparent or translucent casing. That is, the plastic case 100 is a plastic case 100 made of transparent or translucent plastic.
By adopting the scheme, the plastic shell 100 can be visualized, and based on the visualization, a user can realize qualitative observation of the free electrolyte amount of the lithium ion battery in the using process, so that the residual cycle life of the lithium ion battery can be conveniently judged.
Referring to fig. 1 and 2, in the present embodiment, the wall thickness of the plastic casing 100 is 0.4 to 2mm, and the wall thickness of the plastic frame 220 is greater than or equal to the wall thickness of the plastic casing 100.
By adopting the scheme, the plastic shell 100 and the plastic frame 220 can be aligned accurately and adaptively, and the reliable, stable and durable connection relationship between the plastic shell 100 and the plastic frame 220 can be conveniently established.
Wherein, the outer wall surface of the plastic frame 220 is flush with the outer wall surface of the plastic casing 100. Specifically, when the wall thickness of the plastic rim 220 is greater than or equal to the wall thickness of the plastic housing 100, the inner wall surface of the plastic rim 220 is inside the inner wall surface of the plastic housing 100.
Through adopting above-mentioned scheme, do benefit to the outside roughness of guarantee connection back battery case to do benefit to the grouping rate that the guarantee adopted lithium ion battery's battery module or battery package.
Referring to fig. 1 and 3, in the present embodiment, the height of the cover plate 210 is 1 to 3 mm.
By adopting the scheme, the strength and the rigidity of the cover plate 210 can be effectively guaranteed; and the height of the cover plate 210 can have a certain adjustable range, so that the air pressure resistance value of the explosion-proof valve 270 can be conveniently designed by adjusting the local height of the cover plate 210, and different explosion-proof requirements can be met.
Referring to fig. 1, an embodiment of the present invention further provides a lithium ion battery, including a battery cell and a battery case. The lithium ion battery is a square battery.
Example two
The difference between this embodiment and the first embodiment is:
referring to fig. 2 and 4, in the present embodiment, the cover plate 210 is a plastic cover plate 212.
By adopting the above scheme, the plastic cover plate 212 can be further lightened on the basis of lightening the plastic shell 100 and the plastic frame 220, so that the mass ratio of the battery shell to the whole lithium ion battery can be further reduced, and the energy density of the lithium ion battery can be further improved.
Referring to fig. 4, in the present embodiment, the top cover 200 further includes a positive tab 250 (made of aluminum) and a negative tab 260 (made of copper and plated with nickel) that are disposed at an interval and both penetrate through the cover plate 210.
Firstly, by adopting the above scheme, the insulation effect between the positive tab 250 and the plastic cover plate 212, between the negative tab 260 and the plastic cover plate 212, and between the positive tab 250 and the negative tab 260 can be ensured based on the insulation property of the plastic cover plate 212, so that the safety performance of the lithium ion battery can be improved; compared with the first embodiment, the present embodiment can omit at least the insulating member, thereby effectively simplifying the structure of the lithium ion battery, simplifying the manufacturing process of the lithium ion battery, and reducing the manufacturing cost of the lithium ion battery.
Next, the positive tab 250 has a positive connection end (not shown) disposed on a side of the cover plate 210 close to the accommodating chamber 101, and a positive lead-out end 251 disposed on a side of the cover plate 210 away from the accommodating chamber 101. Similarly, the negative tab 260 has a negative connection end (not shown) disposed on a side of the cover plate 210 close to the accommodating cavity 101, and a negative lead-out end 261 disposed on a side of the cover plate 210 away from the accommodating cavity 101.
The positive connecting end can be directly welded (optional ultrasonic welding or laser welding) with a positive plate tab of the battery cell to establish an electric connection relation, and the negative connecting end can be directly welded (optional ultrasonic welding or laser welding) with a negative plate tab of the battery cell to establish an electric connection relation without the aid of metal flexible connection.
The positive leading-out end 251 and the negative leading-out end 261 can be directly connected with an external test fixture, so that the performance of the lithium ion battery can be tested and evaluated conveniently without the aid of auxiliary connecting pieces.
Therefore, by adopting the above scheme, the positive tab 250 and the negative tab 260 can be directly electrically connected with the pole piece tab of the battery cell without metal flexible connection, and can be directly connected with an external test fixture without external auxiliary tab, so as to test and evaluate the performance of the lithium ion battery. Therefore, the structure of the lithium ion battery can be further simplified, the manufacturing procedure of the lithium ion battery can be simplified, and the manufacturing cost of the lithium ion battery can be further reduced.
The positive tab 250 and the plastic cover plate 212 are closely attached and connected through a high-temperature thermal compounding process, and the negative tab 260 and the plastic cover plate 212 are also closely attached and connected through a high-temperature thermal compounding process. Therefore, the sealing performance of the whole battery shell can be ensured and improved, and the service performance and the safety performance of the lithium ion battery can be improved.
The positive tab 250 is disposed in the middle of the plastic cover plate 212 in the width direction a, and the negative tab 260 is also disposed in the middle of the plastic cover plate 212 in the width direction a. Therefore, the insulation effect between the plastic cover plate 212 and the positive tab 250 and between the plastic cover plate 212 and the negative tab 260 can be further ensured, and the safety performance of the lithium ion battery can be further improved.
Referring to fig. 4, in the present embodiment, the plastic cover 212 is made of at least one of polyimide, teflon, polyoxymethylene, polymethyl methacrylate, polyphenylene sulfide, and polyether ether ketone.
By adopting the scheme, the temperature resistance range of the plastic cover plate 212 is-140-240 ℃, which is far higher than the temperature range of the lithium ion battery, and the plastic cover plate 212 has better mechanical strength, electrolyte corrosion resistance, acid and alkali resistance, various organic solvents resistance and other performances, so that the risk of deformation of the plastic cover plate 212 can be reduced, the service performance of the plastic cover plate 212 can be ensured and improved, and the service life of the plastic cover plate 212 can be prolonged.
Referring to fig. 4, in the present embodiment, the thickness of the positive tab 250 is 0.1 to 5mm, and the thickness of the negative tab 260 is 0.1 to 5 mm.
By adopting the scheme, the overcurrent capacity of the positive tab 250 and the negative tab 260 can be ensured and improved, so that the electrical performance of the lithium ion battery can be ensured and improved.
Referring to fig. 4, in the present embodiment, the positive tab 250 has a positive connection end disposed on one side of the cover plate 210 close to the accommodating cavity 101, the positive connection end is used for electrically connecting with a positive tab of the battery cell, and the length of the positive connection end is 4-25 mm; negative pole ear 260 has and locates apron 210 and be close to the negative pole link that holds chamber 101 one side, and the negative pole link is used for being connected with the negative pole piece utmost point ear electricity of electric core, and the length of negative pole link is 4 ~ 25 mm.
By adopting the scheme, the stability and the reliability of the electric connection between the positive electrode connecting end and the positive electrode tab of the battery cell can be effectively guaranteed on the basis of compressing the overall height of the lithium ion battery and guaranteeing the volume utilization rate and the energy density of the lithium ion battery, and the stability and the reliability of the electric connection between the negative electrode connecting end and the negative electrode tab of the battery cell can be effectively guaranteed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A battery case, comprising:
the plastic shell is provided with an accommodating cavity which is arranged in an open manner and is used for accommodating the battery cell;
the top cap, the closing cap in hold the accent in the chamber, the top cap include the apron and connect in the apron orientation the plastics frame of plastics casing one side, the plastics frame with the plastics casing is counterpointed and is connected.
2. The battery housing of claim 1, wherein the cover plate is a metal cover plate; the top cap still sets up and all locates including mutual interval anodal post and negative pole post on the apron, wherein, anodal post with the metal covering board electricity is connected, the negative pole post pass through the insulating part with the metal covering board insulated joint.
3. The battery housing of claim 1, wherein the cover plate is a plastic cover plate.
4. The battery housing of claim 3, wherein the top cover further comprises a positive tab and a negative tab disposed at a distance from each other and both disposed through the cover plate.
5. The battery shell according to claim 4, wherein the positive tab has a positive connecting end arranged on one side of the cover plate close to the accommodating cavity, and the length of the positive connecting end is 4-25 mm; the negative pole ear has and locates the apron is close to hold the negative pole link of chamber one side, the length of negative pole link is 4 ~ 25 mm.
6. The battery housing of claim 1, wherein the plastic casing has flame retardant properties.
7. The battery housing of claim 1, wherein the plastic shell is a transparent or translucent shell.
8. The battery casing according to any one of claims 1-7, wherein the wall thickness of the plastic shell is 0.4-2 mm, and the wall thickness of the plastic frame is greater than or equal to the wall thickness of the plastic shell.
9. The battery case according to any one of claims 1 to 7, wherein the height of the cap plate is 1 to 3 mm.
10. A lithium ion battery comprising the battery case according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121504052.4U CN216085054U (en) | 2021-07-01 | 2021-07-01 | Battery case and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121504052.4U CN216085054U (en) | 2021-07-01 | 2021-07-01 | Battery case and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216085054U true CN216085054U (en) | 2022-03-18 |
Family
ID=80664671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121504052.4U Active CN216085054U (en) | 2021-07-01 | 2021-07-01 | Battery case and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216085054U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024260370A1 (en) * | 2023-06-19 | 2024-12-26 | 湖北亿纬动力有限公司 | Housing, shell assembly, and battery |
-
2021
- 2021-07-01 CN CN202121504052.4U patent/CN216085054U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024260370A1 (en) * | 2023-06-19 | 2024-12-26 | 湖北亿纬动力有限公司 | Housing, shell assembly, and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8263240B2 (en) | Secondary battery having a gasket with coupling extensions | |
| KR100723668B1 (en) | Lithium ion batteries | |
| CN113346201A (en) | Cylindrical battery, battery module and battery pack | |
| CN1321468C (en) | Quadrangular secondary battery having lead plate attached thereto | |
| EP2429014A2 (en) | Secondary battery pack having a novel structure | |
| KR101198026B1 (en) | Secondary Battery Pack of Novel Structure | |
| BR102012013185B1 (en) | SECONDARY BATTERY SET AND METHOD FOR MANUFACTURING THE SAME | |
| CN101694887A (en) | PCM mold and battery including the same | |
| CN217009372U (en) | Battery with a battery cell | |
| CN111933831A (en) | Button lithium battery and preparation method thereof | |
| CN209232828U (en) | Lithium ion battery with aluminum shell and its shell and its top cover | |
| CN216085054U (en) | Battery case and lithium ion battery | |
| WO2021159996A1 (en) | Battery, battery module, battery pack, and electric vehicle | |
| CN212380483U (en) | Button cell | |
| KR20070097151A (en) | Secondary battery | |
| KR20160103255A (en) | Battery Pack Having Small PCM | |
| CN111628212A (en) | Soft package lithium ion battery, manufacturing method thereof and electric device | |
| KR20070101568A (en) | Lithium secondary battery | |
| KR20220060919A (en) | Secondary battery module and secondary battery pack including the same and vehicle including the same | |
| CN212380479U (en) | A button-type lithium battery | |
| CN114937836A (en) | Rechargeable battery | |
| KR20070101569A (en) | Lithium secondary battery | |
| CN221150163U (en) | Novel electric core structure | |
| CN217788564U (en) | Rechargeable battery | |
| CN216054935U (en) | Battery cover plate assembly, lithium ion battery and battery pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |