Sealing device and hemming battery

Abstract

The utility model discloses a sealing device and a hemming battery. Wherein the sealing device is used for sealing the hemming battery, a hot melt adhesive is preset at a hemming structure of the hemming battery, the sealing device comprises an electric box and an electric conductor, the electric box is electrically connected with the electric conductor, the electric box is used for providing high-frequency alternating current for the electric conductor, the electric conductor is arranged around the outer wall of the hemming structure, and the electric conductor performs eddy current heating on the hemming structure; and after the hot melt adhesive is melted, the hemming structure is sealed. The sealing device does not need to consider the dry state of the glue solution, and improves the sealing property of the hemming battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery equipment, especially to a sealing device and a crimped battery. BACKGROUND

[0002] At present, in order to improve the sealing property of the crimped battery, generally, the glue solution (such as rubber material preparation) is prearranged on the flange of the battery cover body, and after crimping, the prearranged glue solution is clamped in the crimp seam to enhance the air tightness. In the case of prearranging the glue solution on the flange of the battery cover body and crimping without drying, the glue solution still maintains a certain degree of fluidity, which leads to the dissolution or infiltration of the glue solution into the battery, thereby polluting the battery components and affecting the battery performance. In the case of drying the glue solution into a film and then crimping, the pressure resistance of the closed battery cell mounting cavity is small, and the sealing effect is poor. SUMMARY

[0003] The main purpose of the utility model is to provide a sealing device and a crimped battery, which aims to solve the technical problem of poor sealing effect of the crimped battery.

[0004] In order to achieve the above-mentioned utility model purposes, the utility model discloses a sealing device in the first aspect.

[0005] A sealing device for sealing a crimped battery, a hot melt adhesive is prearranged at the crimped structure of the crimped battery, the sealing device comprises an electric box and a conductive body, the electric box is electrically connected with the conductive body, the electric box is used for providing high-frequency alternating current to the conductive body, the conductive body is arranged around the outer wall of the crimped structure, and the conductive body performs eddy current heating on the crimped structure to make the hot melt adhesive melt and seal the crimped structure.

[0006] In one of the embodiments, a first cooling channel is formed in the conductive body, and the first cooling channel is used for circulating cooling medium.

[0007] In one of the embodiments, the conductive body is in a tubular structure.

[0008] In one of the embodiments, the sealing device further comprises a magnetic shielding plate, and the magnetic shielding plate is arranged at the top of the crimped battery.

[0009] In one of the embodiments, a second cooling channel is formed in the magnetic shielding plate, and the second cooling channel is used for circulating cooling medium.

[0010] In one of the embodiments, the magnetic shielding plate is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are both in communication with the second cooling channel, and the first liquid inlet and the first liquid outlet are both arranged on the magnetic shielding plate.

[0011] In one of the embodiments, the sealing device further comprises a magnetic shielding sleeve, which is sleeved on the outer sidewall of the crimped battery.

[0012] In one of the embodiments, a third cooling channel is formed in the magnetic shielding sleeve, and the third cooling channel is used for flowing cooling medium.

[0013] In one of the embodiments, the magnetic shielding sleeve is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet and the second liquid outlet are both communicated with the third cooling channel, and the second liquid inlet and the second liquid outlet are both arranged on the sidewall of the magnetic shielding sleeve.

[0014] The second aspect of the utility model provides a crimped battery, the crimped battery is sealed by the above-mentioned sealing device, comprising:

[0015] A shell, a circumferential edge of the shell is formed with a first crimping edge;

[0016] A cover body is arranged on the top of the shell to form an installation cavity with the shell, the installation cavity is used for installing the core body, a circumferential edge of the cover body is formed with a second crimping edge, the first crimping edge and the second crimping edge are overlapped with each other, and are wound to form a crimping structure, the crimping structure is a conductive structure, the overlapped position of the first crimping edge and the second crimping edge is prearranged with hot melt adhesive, and the conductive body of the sealing device carries out eddy current heating on the crimping structure to seal the crimping structure after the hot melt adhesive is melted.

[0017] Beneficial effects:

[0018] The sealing device of the utility model is used for sealing crimped battery, hot melt adhesive is prearranged at the crimping structure of crimped battery, the sealing device comprises an electric box and a conductive body, the electric box is electrically connected with the conductive body, the electric box is used for providing high-frequency alternating current to the conductive body, the conductive body is arranged around the outer wall of the crimping structure, and the conductive body carries out eddy current heating on the crimping structure to seal the crimping structure after the hot melt adhesive is melted.Working, the electric box provides high-frequency alternating current to the conductive body, the conductive body generates high-frequency alternating magnetic field in response, and exerts on the crimping structure.The crimping structure generates induced current and heats under the action of "eddy current effect" in the high-frequency alternating magnetic field, so that the hot melt adhesive in the crimping structure melts and is compounded, and then the gap filling and bonding of the crimping structure part are realized, so that the crimping structure is sealed.The sealing device does not need to consider the drying state of glue solution, and improves the sealing property of crimped battery. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic view of the sealing device of the crimped battery of one embodiment of the utility model.

[0020] Figure 2is another angle structure schematic view of the sealing device of the crimped battery of one embodiment of the utility model.

[0021] Figure 3 is another angle structure schematic view of the sealing device of the crimped battery of one embodiment of the utility model.

[0022] Figure 4 is Figure 3 Sectional view along A-A direction.

[0023] Figure 5 is Figure 4 Enlarged view at B in the middle.

[0024] Wherein:

[0025] 100, shell; 110, magnetic isolation sleeve; 111, third cooling channel; 112, second liquid inlet; 113, second liquid outlet;

[0026] 200, cover; 210, magnetic isolation plate; 211, second cooling channel; 212, first liquid inlet; 213, first liquid outlet;

[0027] 300, crimped structure; 310, mounting cavity;

[0028] 400, electric conductor; 410, first cooling channel;

[0029] 500, electric box.

[0030] The utility model discloses the realization, functional characteristics and advantages will be further explained with reference to the drawings combining embodiment. Specific embodiments

[0031] It should be understood that the specific embodiments described herein are merely intended to explain the utility model, and are not used to limit the utility model.

[0032] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0033] In the description of the utility model, it should be explained that, unless otherwise specifically defined and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] As Figures 1 to 5As shown in the drawings, in some embodiments, a crimped battery includes a shell 100 and a cover 200. A circumferential edge of the shell 100 is formed with a first crimp. The cover 200 is arranged on the top of the shell 100, so that the cover 200 and the shell 100 enclose an installation cavity 310 for installing a battery body. A circumferential edge of the cover 200 is formed with a second crimp. The first crimp and the second crimp are superimposed on each other, and are wound to form a crimp structure 300. The crimp structure 300 is a conductive structure. The superimposed position of the first crimp and the second crimp is provided with hot melt glue.

[0036] In some embodiments, a sealing device is used to seal a crimped battery. The sealing device includes a conductive body 400 and an electric box 500. The electric box 500 is electrically connected to the conductive body 400. The electric box 500 is used to provide high-frequency alternating current to the conductive body 400. The conductive body 400 is arranged around the outer wall of the crimp structure 300. The conductive body 400 performs eddy current heating on the crimp structure 300, so that the hot melt glue melts to seal the crimp structure 300. The electric box 500 can be a high-frequency alternating current power supply.

[0037] In operation, the electric box 500 provides high-frequency alternating current to the conductive body 400. The conductive body 400 generates a high-frequency alternating magnetic field in response, and exerts an action on the crimp structure 300. The crimp structure 300 is in the high-frequency alternating magnetic field. Under the action of the "eddy current effect", the crimp structure 300 generates induced current and heats up. The hot melt glue in the crimp structure 300 melts and recombines. In turn, the gaps between the crimp structure 300 are filled and bonded, so as to seal the crimp structure 300. The sealing device does not need to consider the drying state of the glue solution, and improves the sealing performance of the crimped battery. In addition, the crimp structure 300 is closest to the conductive body 400 generating the magnetic field, and is most effectively affected by the magnetic field. The magnetic field strength decreases from the surface of the conductive body 400 to the radial direction.

[0038] As shown in the drawings, Figures 1 to 3 In some embodiments, the sealing device further includes an electric box 500. The electric box 500 is electrically connected to the conductive body 400. The electric box 500 is used to provide high-frequency alternating current to the conductive body 400. Specifically, the electric box 500 and the conductive body 400 can be electrically connected through a wire. The electric box 500 can be an all-in-one machine of the high-frequency alternating current power supply. In other embodiments, the high-frequency alternating current power supply can also be a split machine including a control power supply, a high-frequency transformer, etc.

[0039] Specifically, the conductive body 400 is a tubular structure. More specifically, the conductive body 400 can be a copper pipe.

[0040] Specifically, the shell 100 can be a metal material. The cover 200 can be a metal material. The crimp structure 300 can be a metal material.

[0041] As shown in the drawings, Figure 4 and Figure 5As shown, in some embodiments, a first cooling channel 410 is provided inside the conductor 400, and the first cooling channel 410 is used for the flow of cooling medium.

[0042] It should be noted that the conductor 400 generates heat when subjected to high-frequency alternating current. The cooling medium in the first cooling channel 410 can absorb and remove the heat from the conductor 400 in a timely manner, preventing the conductor 400 from overheating. If the temperature of the conductor 400 is too high, it may affect its conductivity, service life, or even cause safety problems such as insulation damage or short circuits.

[0043] Specifically, by continuously circulating the cooling medium, the temperature of the conductor 400 can be maintained within a relatively stable range. A stable temperature ensures that the intensity of the high-frequency alternating magnetic field generated by the conductor 400 is relatively stable, thereby stabilizing the eddy current effect in the rolled edge structure 300 and the melting process of the hot melt adhesive.

[0044] Specifically, the cooling medium needs to have good heat transfer properties, capable of effectively absorbing the heat from the conductor 400. Common cooling media can be liquids or gases. Cooling water is a suitable example.

[0045] Specifically, the first cooling channel 410 is used for the flow of cooling medium. The flow of cooling medium in the channel can be driven by a power source, and an external pump or pressure device can ensure that the cooling medium can flow in the channel at a stable flow rate and speed.

[0046] like Figures 1 to 3 As shown, in some embodiments, the sealing device further includes a magnetic shielding plate 210, which is disposed on the top of the rolled-up battery. The magnetic shielding plate 210 is disposed on the top of the cover 200.

[0047] It should be noted that the high-frequency alternating magnetic field generated by the conductor 400 may cause electromagnetic interference to the surrounding cover 200. The magnetic shielding plate 210 can effectively shield this part of the magnetic field, preventing it from radiating outward. The magnetic shielding plate 210 can block the magnetic field near the rolled edge structure 300, preventing it from damaging the battery cell and ensuring the safety of the battery cell. The magnetic shielding plate 210 can prevent the cover 200 from overheating and damaging itself and its internal components due to the influence of the magnetic field.

[0048] Specifically, the magnetic shielding plate 210 can be tightly fitted to the cover 200. The magnetic shielding plate 210 can be connected to the cover 200 by adhesive, snap-fit, or other mechanical connection methods. The shape and size of the magnetic shielding plate 210 are adapted to the top of the cover 200 so that the magnetic shielding plate 210 can cover the cover 200 and play a corresponding magnetic shielding role.

[0049] Specifically, the magnetic shielding plate 210 has good magnetic shielding properties, and the magnetic shielding plate 210 can be an aluminum plate.

[0050] like Figure 4 As shown, in some embodiments, a second cooling channel 211 is provided in the magnetic shielding plate 210, and the second cooling channel 211 is used for the flow of cooling medium.

[0051] It should be noted that the heat generated by the rolled edge structure 300 will be conducted to the magnetic shielding plate 210, and the heat from the magnetic shielding plate 210 will also be conducted to the battery cell body, thus affecting the normal operation of the battery cell body. The cooling medium can circulate in the second cooling channel 211, absorbing the heat from the magnetic shielding plate 210 through heat conduction, reducing the heat conducted from the magnetic shielding plate 210 to the battery cell body, and preventing the battery cell body from overheating.

[0052] like Figure 2 As shown, in some embodiments, the magnetic shielding plate 210 has a first liquid inlet 212 and a first liquid outlet 213. Both the first liquid inlet 212 and the first liquid outlet 213 are connected to the second cooling channel 211, and both the first liquid inlet 212 and the first liquid outlet 213 are located on the top of the magnetic shielding plate 210.

[0053] It should be noted that the first inlet 212 and the first outlet 213 are connected to the second cooling channel 211, forming a complete coolant circulation path. Coolant can enter the second cooling channel 211 inside the magnetic shielding plate 210 from the external condenser through the first inlet 212. After fully absorbing heat from the magnetic shielding plate 210 within the second cooling channel 211, it flows out from the first outlet 213 back to the condenser for further cooling. This configuration allows the coolant to effectively circulate between the magnetic shielding plate 210 and the condenser, continuously cooling the magnetic shielding plate 210.

[0054] like Figure 4 As shown, in some embodiments, the sealing device further includes a magnetic shielding sleeve 110, which is fitted onto the outer side wall of the rolled-up battery. The magnetic shielding sleeve 110 is fitted onto the outer side wall of the housing 100.

[0055] When the device is in standby mode, the magnetic shielding plate 210 and the magnetic shielding sleeve 110 are in the open / closed state, and the first cooling channel 410, the second cooling channel 211, and the third cooling channel 111 are operating normally for heat dissipation. The battery cell is placed into the magnetic shielding sleeve 110, and then the magnetic shielding plate 210 is lowered, forming a closed state with the magnetic shielding plate 210 and the magnetic shielding sleeve 110 module. In use, the electrical box 500 is opened, generating a high-frequency alternating current, which is transmitted to the conductor 400 to generate a high-frequency alternating magnetic field, heating the rolled edge structure 300 through the eddy current effect. After completing the heat-sealing process, the magnetic shielding plate 210 module is raised, and the battery cell is removed.

[0056] It should be noted that the magnetic isolation sleeve 110 can be tightly surrounded around the shell 100. The shape and size of the magnetic isolation sleeve 110 need to be matched with the outer side wall of the shell 100 to ensure that the magnetic isolation sleeve 110 is tightly attached to the shell 100. The electrically conductive body 400 generates a magnetic field during operation for eddy current heating of the crimping structure 300, and the magnetic isolation sleeve 110 can isolate the magnetic field from spreading into the shell 100, thereby protecting the shell 100 and the battery body inside the shell 100.

[0057] Specifically, the material of the magnetic isolation sleeve 110 can be aluminum.

[0058] As shown in Figure 4 some embodiments, a third cooling channel 111 is formed in the magnetic isolation sleeve 110, and the third cooling channel 111 is used to flow the cooling medium.

[0059] As shown in Figure 2 and Figure 3 Specifically, the magnetic isolation sleeve 110 is provided with a second liquid inlet 112 and a second liquid outlet 113, both of which are in communication with the third cooling channel 111, and both of which are provided on the side wall of the magnetic isolation sleeve 110.

[0060] It should be noted that the heat generated by the crimping structure 300 will be conducted to the magnetic isolation sleeve 110. The cooling medium enters the third cooling channel 111 of the magnetic isolation sleeve 110 through the second liquid inlet 112, absorbs the heat of the magnetic isolation sleeve 110 during the flow in the third cooling channel 111, and then flows out from the second liquid outlet 113. This process forms a circulating path of the cooling medium, and the flow of the cooling medium can be driven and controlled by external equipment. For example, a pump is provided to provide power so that the cooling medium can continuously circulate in the third cooling channel 111, and the flow and pressure of the pump can be adjusted according to the heat dissipation requirement of the magnetic isolation sleeve 110.

[0061] Specifically, the third cooling channel 111 can work cooperatively with an external condenser. The cooling medium that has absorbed heat from the magnetic isolation sleeve 110 will be sent to the radiator for cooling, and then returned to the magnetic isolation sleeve 110 for the next round of heat absorption. This circulating heat dissipation mechanism utilizes the heat transfer characteristics of the cooling medium, and through continuous circulation, the heat of the magnetic isolation sleeve 110 is transferred to the external environment, thereby effectively controlling the temperature of the magnetic isolation sleeve 110.

[0062] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, as described in the specification and drawings of the present application, are also included in the patent protection scope of the present application.

Claims

1. A sealing device for sealing a crimped battery, which is provided with a hot melt adhesive at a crimp structure of the crimped battery, characterized in that, The sealing device comprises an electric box and a conductive body, the electric box is electrically connected with the conductive body, the electric box is used for providing high-frequency alternating current to the conductive body, the conductive body is arranged around the outer wall of the crimping structure, and the conductive body performs eddy current heating on the crimping structure to melt the hot melt adhesive and seal the crimping structure.

2. The sealing device of claim 1, wherein A first cooling channel is arranged in the conductive body, and the first cooling channel is used for flowing cooling medium.

3. The sealing device of claim 1, wherein The conductive body is in a tubular structure.

4. The sealing device of claim 1, wherein The sealing device further comprises a magnetic shielding plate, and the magnetic shielding plate is arranged on the top of the crimping battery.

5. The sealing device of claim 4, wherein, A second cooling channel is arranged in the magnetic shielding plate, and the second cooling channel is used for flowing cooling medium.

6. The sealing device of claim 5, wherein, The magnetic shielding plate is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are in communication with the second cooling channel, and the first liquid inlet and the first liquid outlet are arranged on the magnetic shielding plate.

7. The sealed device of claim 1, wherein, The sealing device further comprises a magnetic shielding sleeve, and the magnetic shielding sleeve is arranged on the outer wall of the crimping battery.

8. The sealing device of claim 7, wherein, A third cooling channel is arranged in the magnetic shielding sleeve, and the third cooling channel is used for flowing cooling medium.

9. The sealing device of claim 8, wherein, The magnetic shielding sleeve is provided with a second liquid inlet and a second liquid outlet, the second liquid inlet and the second liquid outlet are in communication with the third cooling channel, and the second liquid inlet and the second liquid outlet are arranged on the side wall of the magnetic shielding sleeve.

10. A crimped battery, characterized by, The crimping battery is sealed by the sealing device according to any one of claims 1 to 9, comprising: A shell, and a circumferential edge of the shell is formed with a first crimping edge; A cover body is arranged on the top of the shell to form an installation cavity with the shell, the installation cavity is used for installing an electric core body, a circumferential edge of the cover body is formed with a second crimping edge, the first crimping edge and the second crimping edge are overlapped with each other and are wound to form a crimping structure, the crimping structure is a conductive structure, hot melt adhesive is arranged at the overlapped position of the first crimping edge and the second crimping edge, and the conductive body of the sealing device performs eddy current heating on the crimping structure to melt the hot melt adhesive and seal the crimping structure.

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