CN217361767U - Battery case with sealing structure and high-capacity battery - Google Patents
Battery case with sealing structure and high-capacity battery Download PDFInfo
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- CN217361767U CN217361767U CN202220527709.7U CN202220527709U CN217361767U CN 217361767 U CN217361767 U CN 217361767U CN 202220527709 U CN202220527709 U CN 202220527709U CN 217361767 U CN217361767 U CN 217361767U
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- apron
- insulating layer
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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
- 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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Abstract
The utility model relates to a battery technology field specifically discloses a battery case and large capacity battery with seal structure, including barrel, apron, insulating layer and fixed subassembly. The apron is the positive, the negative pole of battery, and the barrel is equipped with bearing portion along edge circumference for the bearing the apron, the apron be equipped with along edge circumference with the unsmooth complex installation department of bearing portion, the bearing portion is equipped with the insulating layer with the contact surface of installation department. The utility model has the advantages that the material cost of the battery is greatly reduced, the internal space of the battery is saved, the energy density of the battery is improved, and the heat dissipation of the battery pole is facilitated by making the pole become the cover plate; when the batteries are connected in series, the contact area between the pole columns is increased, so that the connection effectiveness of the batteries is improved, and the generation of heat is reduced; the apron cooperates with the barrel is unsmooth, has improved the structural strength of battery, sets up the insulating layer in the contact department of apron and barrel, prevents to lead to the fact the short circuit because of utmost point post and barrel electric conductance, has improved the security and the life of battery.
Description
Technical Field
The utility model belongs to the technical field of the battery, especially, relate to a battery case and large capacity battery with seal structure.
Background
The high-capacity lithium battery is one of the development directions of the lithium battery, and can be applied to the fields of energy storage and power batteries. The square battery of lithium cell maximum capacity on the existing market is about 300Ah, and the cylinder battery of maximum capacity is not more than 100Ah, under the background of "carbon reaches the peak" and "carbon neutralization", the energy storage trade is expected to obtain the sufficient development, nevertheless receive the influence of battery capacity, the lithium cell need carry out the series-parallel connection of a plurality of batteries when the energy storage is used, make to connect spare and accessory parts numerous, the hookup step is complicated, loaded down with trivial details, battery management system and wire rod, the quantity of battery box is very big, the energy storage cost is therefore high. The capacity of the battery is improved, and the battery has a remarkable effect on solving the problems. However, the large-capacity battery generates considerable heat during the charging and discharging processes, and if the generated heat cannot be effectively released, the heat is accumulated in the single battery, so that the temperature of the large-capacity battery is not uniform, the service life of the battery is shortened, and a safety accident of the large-capacity battery is caused in a serious case. The large-capacity battery also has the problems of high heat generated by pole waste, unreliable connection between batteries and poor safety.
CN114050306A discloses a lithium battery, comprising: the winding core comprises a main body, wherein a positive electrode empty foil area and a negative electrode empty foil area are arranged at two ends of the main body, the positive electrode empty foil area is formed into a positive electrode end face through flattening, and the negative electrode empty foil area is formed into a negative electrode end face through flattening; the positive electrode connecting cover is buckled on the end face of the positive electrode and is welded with the end face of the positive electrode; and the negative electrode connecting cover is buckled on the end face of the negative electrode and is welded and connected with the negative electrode connecting cover. The positive electrode connecting cover is buckled on the end face of the positive electrode and is connected with the positive electrode connecting cover in a welding mode; the negative electrode connecting cover is buckled on the end face of the negative electrode and is connected in a welding mode. This application is only with the electrode of battery and end cover welding together to not regard as the electrode of battery with whole end cover, radiating area and electrically conductive area are all less, are unfavorable for guaranteeing the security and the stability of large capacity battery.
CN112864502A discloses a top cover assembly, a housing and a secondary battery, the top cover assembly includes a top cover plate, a terminal post, a fixing member and a limiting member. The top cover plate is provided with a first through hole. The pole column penetrates through the first through hole. The fixed part is fixedly connected with one end of the protruding top cover plate of the pole. At least part of the limiting piece is positioned between the fixed piece and the top cover plate to separate the fixed piece and the top cover plate. The surface of the top cover plate, which is in contact with the limiting part, is a first matching surface, the first matching surface is provided with a first matching part, the surface of the limiting part, which is in contact with the top cover plate, is a second matching surface, the second matching surface is provided with a second matching part, and the first matching part and the second matching part are in concave-convex matching to limit the limiting part to rotate by taking the axis of the first through hole as a rotating shaft. The shell of the secondary battery uses the top cover assembly, so that the mechanical damage of the tab connection part of the secondary battery under the action of external force can be improved, and the phenomenon that the short circuit fault occurs in the battery cell can be improved. Although this application also uses the concave-convex fitting limit component, it does not solve the problem of insulation between the cover plate and the case of the large-capacity battery using the cover plate as the terminal, and the sealing effect is also not good.
Disclosure of Invention
Therefore, it is necessary to provide a battery case with a sealing structure and a large-capacity battery, in order to solve the above technical problems, a cover plate of the battery is a positive electrode and a negative electrode of the battery, the cover plate is in concave-convex fit with a barrel, and an insulating layer is arranged on a contact surface between the cover plate and the barrel, so that the structure is simple, the cost is saved, and the improvement of the energy density and the safety of the battery is facilitated.
The technical scheme of the utility model as follows:
a battery shell with a sealing structure comprises a cylinder body and a cover plate, wherein the cylinder body and the cover plate are enclosed to form the battery shell, the cover plate comprises a first cover plate and a second cover plate, the first cover plate is a battery anode, and the second cover plate is a battery cathode;
the cylinder body is provided with a first bearing part along the circumferential direction of a first edge for bearing the first cover plate, the first cover plate is provided with a first mounting part which is in concave-convex fit with the first bearing part along the circumferential direction of the first edge, and a first insulating layer is arranged on the contact surface of the first bearing part and the first mounting part;
the barrel is provided with a second bearing part along the second edge circumferential direction for bearing the second cover plate, the second cover plate is provided with a second installation part matched with the second bearing part in a concave-convex mode along the second edge circumferential direction, and a second insulating layer is arranged on the contact surface of the second bearing part and the second installation part.
Preferably, the first bearing portion and the second bearing portion are respectively provided with a groove along the circumferential direction.
Preferably, the bottom of the groove is provided with a protrusion along the circumferential direction.
Preferably, the first installation part and the second installation part are respectively provided with a bulge matched with the groove.
Preferably, the insulating layer is an insulating gasket.
Preferably, the first installation department first bearing portion with the first insulating piece is equipped with the matched with fixed orifices, the second installation department second bearing portion with the second insulating piece is equipped with the matched with fixed orifices.
Preferably, a fixing component is arranged at the fixing hole.
Preferably, the fixing member is insulated from the housing.
Preferably, the insulating layer is an insulating glue layer.
A large-capacity battery comprising the battery case according to any one of the above.
The utility model has the advantages that:
the utility model greatly reduces the material cost of the battery, saves the internal space of the battery and improves the energy density of the battery by making the pole become the cover plate; the pole is a heat accumulation part of the battery, and the pole is used as a battery cover plate, so that the heat dissipation of the battery pole is facilitated; when a plurality of batteries are connected in series, the contact area between the pole posts is increased, so that the connection effectiveness of the batteries is improved, and the generation of heat is reduced; the apron cooperates with the barrel is unsmooth, has improved the structural strength of battery, sets up the insulating layer in the contact department of apron and barrel, prevents to lead to the fact the short circuit because of utmost point post and barrel electric conductance, has improved the security and the life of battery.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the overall structure of a large capacity battery;
FIG. 2 is a second schematic diagram of the overall structure of a large-capacity battery;
FIG. 3 is a cross-sectional view of a battery housing having a sealing structure;
fig. 4 is a partially enlarged view of a portion a in fig. 3.
Fig. 5 is a partially enlarged view of a portion B in fig. 3.
Fig. 6 is a schematic structural view of the fixing assembly.
Reference numerals:
1-barrel, 2-apron, 21-first apron, 22-second apron, 3-supporting part, 31-first supporting part, 32-second supporting part, 4-installation department, 41-first installation department, 42-second installation department, 5-insulating layer, 51-first insulating layer, 52-second insulating layer, 6-recess, 7-fixed orifices, 8-fixed components, 81-bolt, 82-insulating gasket, 83-insulating sleeve, 84-nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, 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 invention and are not intended to limit the invention.
Hereinafter, embodiments of a battery sealing structure, a battery case having the same, and a large-capacity battery according to the present invention will be specifically disclosed with reference to the accompanying drawings as appropriate. But a detailed description thereof will be omitted. For example, detailed descriptions of already known matters and repetitive descriptions of actually the same configurations may be omitted. This is to avoid unnecessarily obscuring the following description, and to facilitate understanding by those skilled in the art. The drawings and the following description are provided for those skilled in the art to fully understand the present invention, and are not intended to limit the subject matter recited in the claims.
All embodiments and alternative embodiments of the invention may be combined with each other to form new solutions, if not specified otherwise. All technical features and optional technical features of the invention may be combined with each other to form a new technical solution, if not specifically stated.
The terms "comprises" and "comprising" as used herein mean open and closed unless otherwise specified. For example, "comprising" and "comprises" may mean that other components not listed may also be included or included, or that only listed components may be included or included.
It is to be understood that relational terms such as "first," "second," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.
Example 1
As shown in fig. 1, the present embodiment shows a battery housing with a sealing structure, which includes a cylinder 1 and a cover plate 2, the cylinder 1 and the cover plate 2 enclose to form the battery housing, the cover plate 2 includes a first cover plate 21 and a second cover plate 22, the first cover plate 21 is a battery anode, and the second cover plate 22 is a battery cathode; the cylinder body 1 is provided with a first supporting part 31 along the circumferential direction of a first edge for supporting the first cover plate 21, the first cover plate 21 is provided with a first mounting part 41 which is in concave-convex fit with the first supporting part 31 along the circumferential direction of the first edge, and a first insulating layer 51 is arranged on the contact surface of the first supporting part 31 and the first mounting part 41; the cylinder 1 is provided with a second supporting portion 32 along the second edge circumference for supporting the second cover plate 22, the second cover plate 22 is provided with a second mounting portion 42 in concave-convex fit with the second supporting portion 32 along the second edge circumference, and a second insulating layer 52 is provided on the contact surface between the second supporting portion 32 and the second mounting portion 42.
It should be noted that, in the embodiment, the battery post is used as the cover plate, so that the material cost of the battery is greatly reduced, the internal space of the battery is also saved, and the energy density of the battery is improved; the pole is a heat accumulation part of the battery, and the pole is used as a battery cover plate, so that the heat dissipation of the battery pole is facilitated; when a plurality of batteries are connected in series, the contact area between the pole columns is increased, so that the connection effectiveness of the batteries is improved, and the generation of heat is reduced; the apron cooperates with the barrel is unsmooth, has improved the structural strength of battery, sets up the insulating layer in the contact department of apron and barrel, prevents to lead to the fact the short circuit because of utmost point post and barrel electric conductance, has improved the security and the life of battery.
Example 2
As shown in fig. 2, the present embodiment shows a battery case with a sealing structure, which includes a cylinder 1 and a cover plate 2, where the cylinder 1 and the cover plate 2 enclose to form the battery case, and the cover plate 2 includes a first cover plate 21 and a second cover plate 22, where the first cover plate 21 is a battery positive electrode, and the second cover plate 22 is a battery negative electrode; the cylinder body 1 is provided with a first bearing part 31 along the circumferential direction of a first edge for bearing the first cover plate 21, the first cover plate 21 is provided with a first mounting part 41 which is in concave-convex fit with the first bearing part 31 along the circumferential direction of the edge, the cylinder body is provided with a second bearing part 32 along the circumferential direction of a second edge for bearing the second cover plate 22, and the second cover plate 22 is provided with a second mounting part 42 which is in concave-convex fit with the second bearing part 32 along the circumferential direction of the edge.
As shown in fig. 3 to 5, the first and second bearing portions 31 and 32 are respectively provided with a groove 6 along the circumferential direction, and the bottom of the groove 6 is provided with a protrusion along the circumferential direction. The first mounting part 41 and the second mounting part 42 are provided with projections, respectively, which match the shape of the recess 6. Through making bearing portion and installation department form unsmooth complex structure along circumference, can effectively strengthen battery case's sealed effect and structural strength.
A first insulating layer 51 is arranged on the contact surface of the first supporting part 31 and the first mounting part 41; a second insulating layer 52 is provided on the contact surface between the second receiving portion 32 and the second mounting portion 42. In the present embodiment, the first insulating layer 51 is a first insulating pad, and the second insulating layer 52 is a second insulating pad. The first mounting portion 41, the first insulating spacer and the first bearing portion 31 are provided with fixing holes 7 matched with each other, and the second mounting portion 42, the second insulating spacer and the second bearing portion 32 are provided with fixing holes 7 matched with each other. And a fixing component 8 insulated from the shell is arranged at the fixing hole 7.
In the embodiment, as shown in fig. 6, the fixing member 8 includes a bolt 81, an insulating washer 82, an insulating sleeve 83 and a nut 84, the insulating washer 82 is disposed between the bolt 81 and the mounting portion 4, the insulating sleeve 83 is disposed on the bolt 81, and is fixed by the nut 84, so that the structural strength is enhanced, the battery case is insulated from the fixing member, and the battery is prevented from being short-circuited due to the electrical conduction between the cover plate and the barrel.
Example 3
The embodiment shows a battery shell with a sealing structure, which comprises a cylinder body 1 and a cover plate 2, wherein the cylinder body 1 and the cover plate 2 enclose to form the battery shell, the cover plate 2 comprises a first cover plate 21 and a second cover plate 22, the first cover plate 21 is a battery anode, and the second cover plate 22 is a battery cathode; the cylinder body 1 is provided with a first bearing part 31 along the circumferential direction of a first edge for bearing the first cover plate 21, the first cover plate 21 is provided with a first mounting part 41 which is in concave-convex fit with the first bearing part 31 along the circumferential direction of the edge, the cylinder body is provided with a second bearing part 32 along the circumferential direction of a second edge for bearing the second cover plate 22, and the second cover plate 22 is provided with a second mounting part 42 which is in concave-convex fit with the second bearing part 32 along the circumferential direction of the edge.
The first bearing portion 31 and the second bearing portion 32 are respectively provided with a groove 6 along the circumferential direction, and the bottom of the groove 6 is provided with a protrusion along the circumferential direction. The first mounting portion 41 and the second mounting portion 42 are respectively provided with protrusions matching the shape of the groove 6. Through making bearing portion and installation department form unsmooth complex structure along circumference, can effectively strengthen battery case's sealed effect and structural strength.
A first insulating layer 51 is arranged on the contact surface of the first supporting part 31 and the first mounting part 41; a second insulating layer 52 is provided on the contact surface between the second receiving portion 32 and the second mounting portion 42. In this embodiment, the first insulating layer 51 and the second insulating layer 52 are both insulating glue layers, and the insulating glue layers are formed by pouring insulating glue. The first mounting portion 41, the first insulating layer 51 and the first bearing portion 31 are provided with matching fixing holes 7, and the second mounting portion 42, the second insulating pad layer 52 and the second bearing portion 32 are provided with matching fixing holes 7. And a fixing component 8 insulated from the shell is arranged at the fixing hole 7. In this embodiment, the fixing member 8 is a bolt 81, an insulating spacer 82, an insulating sleeve 83 and a nut 84, the insulating spacer 82 is disposed between the bolt 81 and the mounting portion 4, the insulating sleeve 83 is sleeved on the bolt 81, and the fixing member is fixed by the nut 84, so that the strength of the structure is enhanced, the battery case is insulated from the fixing member, and the battery is prevented from being short-circuited due to the electrical conduction between the cover plate and the cylindrical body.
Example 4
This example discloses a large capacity battery comprising the battery case of examples 1-3 above.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A battery shell with a sealing structure comprises a cylinder body and a cover plate, wherein the cylinder body and the cover plate are enclosed to form the battery shell;
the cylinder body is provided with a first bearing part along the circumferential direction of a first edge for bearing the first cover plate, the first cover plate is provided with a first mounting part which is in concave-convex fit with the first bearing part along the circumferential direction of the first edge, and a first insulating layer is arranged on the contact surface of the first bearing part and the first mounting part;
the barrel is provided with a second bearing part along the second edge circumferential direction for bearing the second cover plate, the second cover plate is provided with a second installation part in concave-convex fit with the second bearing part along the second edge circumferential direction, and a second insulating layer is arranged on the contact surface of the second bearing part and the second installation part.
2. The battery case with a sealing structure according to claim 1, wherein the first and second bearing portions are each provided with a groove in a circumferential direction.
3. The battery case with a sealing structure according to claim 2, wherein the groove bottom is provided with a projection in the circumferential direction.
4. The battery case having a sealing structure according to any one of claims 2 to 3, wherein the first mounting portion and the second mounting portion are respectively provided with projections which fit in the grooves.
5. The battery case with a sealing structure according to claim 1, wherein the insulating layer includes a first insulating sheet and a second insulating sheet.
6. The battery case having a sealing structure according to claim 5, wherein the first mounting portion, the first bearing portion and the first insulating sheet are provided with mating fixing holes, and the second mounting portion, the second bearing portion and the second insulating sheet are provided with mating fixing holes.
7. The battery case having a sealing structure according to claim 6, wherein a fixing member is provided at the fixing hole.
8. The battery case with a sealing structure of claim 7, wherein the fixing assembly is insulated from the case.
9. The battery case with a sealing structure of claim 1, wherein the insulating layer is an insulating glue layer.
10. A large-capacity battery comprising the battery case according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220527709.7U CN217361767U (en) | 2022-03-11 | 2022-03-11 | Battery case with sealing structure and high-capacity battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220527709.7U CN217361767U (en) | 2022-03-11 | 2022-03-11 | Battery case with sealing structure and high-capacity battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217361767U true CN217361767U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220527709.7U Active CN217361767U (en) | 2022-03-11 | 2022-03-11 | Battery case with sealing structure and high-capacity battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217361767U (en) |
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2022
- 2022-03-11 CN CN202220527709.7U patent/CN217361767U/en active Active
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