CN216720257U - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
- Publication number
- CN216720257U CN216720257U CN202121723953.2U CN202121723953U CN216720257U CN 216720257 U CN216720257 U CN 216720257U CN 202121723953 U CN202121723953 U CN 202121723953U CN 216720257 U CN216720257 U CN 216720257U
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- battery
- nail
- sealing
- sealant
- injection hole
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Abstract
The utility model discloses a battery, which comprises: the battery shell is provided with a liquid injection hole; the sealing nail is mounted on the battery shell and used for plugging the liquid injection hole; the sealing glue is used for bonding the sealing nail to the battery shell to keep the sealing of the liquid injection hole when the maximum allowable pressure of the sealing glue is met, and the sealing glue is invalid to release the sealing of the liquid injection hole when the pressure in the battery shell exceeds the maximum allowable pressure when the pressure in the battery shell is not more than the maximum allowable pressure. The battery provided by the embodiment of the utility model integrates the pressure relief function at the sealing position of the liquid injection hole, and has the advantages of being beneficial to improving the energy density, high in safety, low in cost and the like.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery.
Background
In the related art, when the battery case is assembled, the electrolyte needs to be injected into the battery case through the injection hole, so as to ensure that the electrode assembly of the battery is soaked by the electrolyte. After the electrolyte is injected into the battery case, the injection hole needs to be well sealed to prevent the electrolyte from seeping out.
The battery is usually through the sealed hole of crowded income of micelle, or seal the notes liquid hole through modes such as welding seal and seal, but no matter the sealed liquid hole of annotating of micelle or welded mode, all can apply great stress to battery case, need set up the battery case of great thickness, just can guarantee its structural strength, is unfavorable for the casing to be done thinly, leads to the energy density of battery to be difficult to promote, and has the potential safety hazard. If a pressure relief valve is additionally provided, the cost of the battery increases.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a battery, which integrates a pressure relief function at the sealing position of a liquid injection hole, and has the advantages of being beneficial to increasing energy density, high in safety, low in cost, etc.
To achieve the above object, there is provided a battery according to an embodiment of the present invention, including: the battery shell is provided with a liquid injection hole; the sealing nail is mounted on the battery shell and used for plugging the liquid injection hole; the sealing glue is used for bonding the sealing nail to the battery shell to keep the sealing of the liquid injection hole when the maximum allowable pressure of the sealing glue is not more than the maximum allowable pressure, and the sealing glue is invalid to release the sealing of the liquid injection hole when the pressure in the battery shell is more than the maximum allowable pressure.
According to the battery provided by the embodiment of the utility model, the pressure relief function is integrated at the sealing position of the liquid injection hole, so that the advantages of being beneficial to improving the energy density, high in safety, low in cost and the like are achieved.
According to some embodiments of the present invention, the melting point of the sealant is satisfied, the sealing nail is bonded to the battery case to maintain the sealing of the liquid injection hole when the temperature of the sealant is lower than the melting point, and the sealant fails to seal the liquid injection hole when the temperature of the sealant reaches the melting point.
According to some embodiments of the utility model, the sealing spike comprises: the nail post extends into the liquid injection hole; the nail cap is connected to the nail column and located outside the battery shell, and the sealant is located between the nail cap and the battery shell and surrounds the nail column.
Furthermore, the surface of the nail cap facing the battery shell is provided with a glue groove extending along the circumferential direction of the battery shell, the glue groove surrounds the nail column, and the glue groove is filled with the sealant.
According to some embodiments of the present invention, a surface of the battery case to which the sealant is bonded and a surface of the sealing nail facing the battery case are configured as rough surfaces having a roughness Ra of more than 1.5 μm and less than 3 μm.
According to some embodiments of the utility model, the battery further comprises: an electrode assembly disposed within the battery case; a rivet mounted to the battery case, the rivet extending into the battery case and being connected to the electrode assembly; insulating seals disposed between the rivet and the battery case and between the battery case and the electrode assembly; the sealing nail and the rivet are arranged on the same side of the battery shell.
According to some embodiments of the utility model, the sealant is a polypropylene and polyethylene blend, a polypropylene or acrylate part.
According to some embodiments of the utility model, the maximum thickness of the sealant is 0.05mm to 0.1 mm.
According to some embodiments of the utility model, the maximum allowable pressure of the sealant is 5Mpa to 6 Mpa.
According to some embodiments of the utility model, the sealant has a melting point of 250 ℃ to 300 ℃.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a battery according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a battery according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a sealing nail of a battery according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating the assembly of a battery case, a sealing nail and a sealant of a battery according to an embodiment of the present invention.
Reference numerals:
a battery 1, a battery case 100, a seal nail 200, a seal gum 300, a liquid injection hole 400,
The nail pole 210, the nail cap 220, the glue groove 221, the electrode assembly 500, the rivet 600 and the insulating sealing member 700.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in 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 therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more, and "several" means one or more.
A battery 1 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 4, a battery 1 according to an embodiment of the present invention includes a battery case 100, a sealing nail 200 and a sealant 300,
the battery case 100 is provided with a pour hole 400. The seal nail 200 is attached to the battery case 100 and blocks the liquid inlet 400. The maximum allowable pressure of the sealant 300 is satisfied, the sealant 300 bonds the seal nail 200 to the battery case 100 to maintain the seal against the liquid injection hole 400 when the pressure in the battery case 100 is not greater than the maximum allowable pressure, and the sealant 300 fails to release the seal against the liquid injection hole 400 when the pressure in the battery case 100 is greater than the maximum allowable pressure.
For example, the battery 1 may be a steel-shell lithium battery, the battery 1 has a rectangular parallelepiped structure, and the liquid injection hole 400 is located on the surface of the battery 1 with the smallest area. The sealant 300 can seal the injection hole 400 by bonding the battery case 100 and the sealing nail 200 at normal temperature or by heating. The cross sections of the sealing nail 200 and the liquid injection hole 400 can be circular, so that the liquid injection hole 400 can be injected with glue and sealed conveniently.
According to the battery 1 of the embodiment of the utility model, the liquid injection hole 400 is sealed by adopting a mode of combining the sealant 300 and the sealing nail 200, the sealing nail 200 can be bonded to the battery shell 100 by utilizing the sealant 300, the sealing nail 300 blocks the liquid injection hole 400, compared with the sealing mode of extruding colloidal particles into the sealing hole or welding in the related art, the stress applied to the battery shell 100 by the sealing nail 300 for blocking the liquid injection hole 400 is smaller, and the battery shell 100 can be processed to be thinner. Thus, by reducing the thickness of the battery case 100, the energy density of the battery 1 is effectively increased.
When the pressure in the battery case 100 is not greater than the maximum allowable pressure, the battery case 100 forms a good sealing structure, ensuring normal use of the battery 1. When the pressure in the battery shell 100 is too high, the sealing of the liquid injection hole 400 is released through the sealing glue 300, so that the interior of the battery shell 100 is communicated with the atmosphere, the pressure in the battery shell 100 is released, the pressure is released in time when the pressure in the battery shell 100 is abnormal, the pressure is released through the sealing glue 300, the pressure in the battery shell 100 can be recovered to be within a normal range in time, the pressure in the battery shell 100 cannot be continuously increased, the sealing glue 300 is failed before the pressure in the battery shell 100 reaches the maximum pressure which can be borne by the battery shell 100, the safety risks of explosion and the like caused by the too high pressure in the battery shell 100 are reduced, and the power utilization safety is ensured. And, the sealing and unsealing of the pour hole 400 is controlled by the sealant 300 to control the pressure inside the battery case 100. Thus, no extra pressure relief valve is needed, and the cost of the battery 1 is reduced.
Therefore, the battery 1 according to the embodiment of the utility model integrates the pressure relief function at the sealing position of the liquid injection hole, and has the advantages of being beneficial to improving the energy density, high in safety, low in cost and the like.
In some embodiments of the present invention, the melting point of the sealant 300 is satisfied, the sealant 300 adheres the sealing nail 200 to the battery case 100 to maintain the sealing of the pour hole 400 when the temperature of the sealant 300 is lower than the melting point, and the sealant 300 fails to seal the pour hole 400 when the temperature of the sealant 300 reaches the melting point, so as to release the sealing of the sealing nail 200.
When the battery 1 is normally used, the temperature is moderate, the sealant 300 has a good sealing effect on the liquid injection hole 400, when the interior of the battery abnormally generates heat, the heat of the battery 1 is transferred to the sealant 300, the sealant 300 melts when reaching a melting point and loses viscosity, the pressure in the battery shell 100 is released from the liquid injection hole 400, and the problem that the temperature of the battery 1 continuously rises to cause the burning of an electric appliance is avoided.
In some embodiments of the present invention, as shown in fig. 3 and 4, the seal peg 200 includes a post 210 and a nut 220.
The nail column 210 extends into the liquid injection hole 400, the nail cap 220 is connected to the nail column 210 and located outside the battery shell 100, the diameter of the nail cap is larger than that of the nail column 210, and the sealant 300 is located between the nail cap 220 and the battery shell 100 and surrounds the nail column 210.
The nail column 210 blocks the liquid injection hole 400 by extending into the liquid injection hole 400. The nail 210 and the injection hole 400 are not fixed by pressing, but are fixed by the sealant 300. The nail 210 and the injection hole 400 can be in clearance fit, when the pressure in the battery shell 100 is too high, the sealing of the sealing glue 300 fails, the interior of the battery shell 100 is communicated with the atmosphere, the pressure in the battery shell 100 can be released from the clearance between the nail 210 and the inner wall of the injection hole 400, or the pressure in the battery shell 100 pushes the sealing nail 200 out of the injection hole 400 to be released. The sealant 300 is added between the nail cap 220 and the battery case 100, so that the contact area between the sealing nail 200 and the battery case 100 and the sealant 300 is large, and a good sealing effect is provided when the pressure and temperature in the battery case 100 are normal. And the sealant 300 surrounds the nail post 210, so that the sealant 300 can seal the gap between the nail 200 and the battery case 100, and the sealing performance at the liquid injection hole 400 is further ensured.
Further, as shown in fig. 4, the surface of the nail cap 220 facing the battery case 100 is provided with a glue groove 221 extending along the circumferential direction thereof, the glue groove 221 surrounds the nail post 210, and the sealant 300 is filled in the glue groove 221.
The nail cap 220 enables more sealant 300 to be accommodated between the nail cap 220 and the battery case 100 by constructing the sealant groove 221, and the sealant groove 221 defines the shape of the sealant 300 and increases the thickness of the sealant 300. In addition, through the arrangement of the glue groove 221, a circle of blocking edge is formed on the outer peripheral edge of the surface of the nail cap 220 facing the battery shell 100, so that the sealant 300 is prevented from flowing to the radial outer side of the nail cap 220 before the sealant 300 is solidified, and the molding of the sealant 300 is facilitated.
In some embodiments of the present invention, as shown in fig. 4, the surface of the battery case 100 to which the sealant 300 is attached and the surface of the sealing nail 200 facing the battery case 100 are constructed as rough surfaces having a roughness Ra of more than 1.5 μm and less than 3 μm. For example, the rough surface can be formed by processing such as corona, plasma cleaning, laser etching, etc.
Particularly, the processing modes such as corona, plasma cleaning, laser etching and the like change the microstructure of the bonding surface of the battery shell 100 and the sealing nail 200 with the sealant 300, the surface roughness and the microscopic surface area of the surfaces of the battery shell 100 and the sealing nail 200 facing the battery shell 100 are increased, the interaction force of the bonding surface of the battery shell 100 and the bonding surface of the sealing nail 200 to the sealant 300 is improved, the bonding firmness of the sealant 300 is ensured, and the sealing of the liquid injection hole 400 is ensured.
In some embodiments of the present invention, the battery 1 further includes an electrode assembly 500, a rivet 600, and an insulating seal 700.
The electrode assembly 500 is provided in the battery case 100. The rivet 600 is mounted to the battery case 100, and the rivet 600 extends into the battery case 100 and is coupled to the electrode assembly 500. Insulating seals 700 are provided between the rivet 600 and the battery case 100 and between the battery case 100 and the electrode assembly 500. Wherein the sealing nail 200 and the rivet 600 are mounted on the same side of the battery case 100.
The rivet 600 is riveted to the battery case 100 and electrically connected to the electrode assembly 500, and the rivet 600 is insulated from the battery case 100 and from the electrode assembly 500 and the battery case 100 by the insulating seal 700. By mounting the seal nail 200 and the rivet 600 on the same side of the battery case 100, space outside the battery case 100 is saved and the appearance integrity of the battery 1 is higher.
In some embodiments of the utility model, the sealant 300 is a blend of polypropylene and polyethylene, a polypropylene piece, or an acrylate piece. The materials are all single polymer materials or composite materials, the chemical stability is high, the sealant 300 is not dissolved in most solutions, the low temperature resistance and the insulating property of the materials are excellent, and the reliability and the service life of the sealant 300 adhered to the sealing nail 200 and the battery shell 100 are further ensured.
In some embodiments of the utility model, the maximum thickness of the sealant 300 is between 0.05mm and 0.1 mm. For example, the distance from the bottom of the glue groove 221 to the battery case 100 is 0.05mm to 0.1mm, which ensures that the sealant 300 adheres the seal nail 200 to the battery case 100 to maintain the seal of the liquid injection hole 400 when the pressure in the battery case 100 is not greater than the maximum allowable pressure; and also ensures that the sealant 300 can be timely disabled to release the sealing of the liquid injection hole 400 when the pressure in the battery case 100 exceeds the maximum allowable pressure.
In some embodiments of the present invention, the maximum allowable pressure of the sealant 300 is 5Mpa to 6 Mpa.
When the pressure inside the battery case 100 exceeds the maximum allowable pressure, the sealant 300 is deactivated to release the sealing of the injection hole 400. The maximum allowable pressure of the sealant 300 is less than the pressure that the battery case 100 can bear, and therefore when the pressure in the battery case 100 exceeds the maximum allowable pressure, the sealant 300 can fail in time, so that the battery case 100 is relieved in time, and the pressure in the battery case 1 is always kept in a safe range.
In some embodiments of the utility model, the melting point of the sealant 300 is between 250 ℃ and 300 ℃. When the battery 1 is out of control due to heat, the temperature rises rapidly, the temperature is transferred to the sealant 300, the sealant 300 fails in sealing due to high temperature, the temperature of the battery 1 is prevented from rising continuously, and the power utilization safety is ensured.
Other constructions and operations of the battery 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of "a particular embodiment," "a particular example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A battery, comprising:
the battery shell is provided with a liquid injection hole;
the sealing nail is mounted on the battery shell and used for plugging the liquid injection hole;
the sealing nail is bonded to the battery shell by the sealing glue when the pressure in the battery shell is not more than the maximum allowable pressure so as to keep the sealing of the liquid injection hole, and the sealing glue fails to release the sealing of the liquid injection hole when the pressure in the battery shell exceeds the maximum allowable pressure;
wherein, sealed nail includes nail post and nail cap, the nail post stretches into annotate the liquid hole, the nail cap is connected in the nail post and is located the battery shell is external, sealed glue is located the nail cap with just encircle between the battery shell the nail post, the orientation of nail cap the surface of battery shell is equipped with along the gluey groove of its circumference extension, gluey groove encircles the nail post, sealed glue fill in gluey groove.
2. The battery according to claim 1, wherein the surface of the battery case to which the sealant is bonded and the surface of the seal nail facing the battery case are configured as rough surfaces having a roughness Ra of more than 1.5 μm and less than 3 μm.
3. The battery of claim 1, further comprising:
an electrode assembly disposed within the battery case;
a rivet mounted to the battery case, the rivet extending into the battery case and being connected to the electrode assembly;
insulating seals disposed between the rivet and the battery case and between the battery case and the electrode assembly;
the sealing nail and the rivet are arranged on the same side of the battery shell.
4. The cell defined in any one of claims 1-3, wherein the sealant is a polypropylene or acrylate member.
5. The cell defined in any one of claims 1-3, wherein the sealant has a maximum thickness of from 0.05mm to 0.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121723953.2U CN216720257U (en) | 2021-07-27 | 2021-07-27 | Battery with a battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121723953.2U CN216720257U (en) | 2021-07-27 | 2021-07-27 | Battery with a battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216720257U true CN216720257U (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121723953.2U Active CN216720257U (en) | 2021-07-27 | 2021-07-27 | Battery with a battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216720257U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683134A (en) * | 2023-08-03 | 2023-09-01 | 中自环保科技股份有限公司 | Explosion-proof structure of jumbo size cylinder battery |
-
2021
- 2021-07-27 CN CN202121723953.2U patent/CN216720257U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683134A (en) * | 2023-08-03 | 2023-09-01 | 中自环保科技股份有限公司 | Explosion-proof structure of jumbo size cylinder battery |
| CN116683134B (en) * | 2023-08-03 | 2023-10-24 | 中自环保科技股份有限公司 | Explosion-proof structure of cylindrical battery |
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