A battery encapsulation method, a battery encapsulation system, a battery, and a battery casing.

Abstract

This invention discloses a battery encapsulation method, a battery encapsulation system, a battery, and a battery casing, relating to the field of battery technology. The battery encapsulation method is applied to a battery casing, which includes a cover plate and a housing. The method includes: applying adhesive to one side of the cover plate to form an adhesive layer; covering the housing with the adhesive layer on the side of the cover plate, so that the adhesive layer is in contact with the housing; and performing intermittent laser welding along the contact path between the cover plate and the housing, so that the adhesive layer melts upon heating and fills the gap between the cover plate and the housing. The battery encapsulation method provided by this invention is convenient and quick to operate, saving time and effort, and providing better sealing performance.

Description

[0001] This application is a divisional application of the invention patent application filed on February 18, 2022, entitled "A Battery Packaging Method, System and Battery", with application number 2022101497001. Technical Field

[0002] This invention relates to the field of battery technology, and more specifically, to a battery packaging method, a battery packaging system, a battery, and a battery casing. Background Technology

[0003] Currently, the common practice in the market for encapsulating batteries using a casing is to directly weld the cover plate onto the casing. This primarily involves two welding methods: one is full welding along the contact path, which is cumbersome, time-consuming, and labor-intensive; the other is intermittent spot welding along the contact path, which suffers from poor casing sealing and a risk of leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a battery packaging method that is convenient and quick to operate and has better sealing performance.

[0005] Another objective of this invention is to provide a battery packaging system that is convenient and quick to operate and has better sealing performance.

[0006] Another object of the present invention is to provide a battery seal that has better sealing performance.

[0007] This invention provides a technical solution:

[0008] A battery encapsulation method is applied to a battery casing, the battery casing including a cover plate and a housing, the battery encapsulation method comprising:

[0009] Apply adhesive to one side of the cover plate to form an adhesive layer;

[0010] Cover the box body with the side of the cover plate containing the adhesive layer so that the adhesive layer comes into contact with the box body;

[0011] Intermittent laser welding is performed along the contact trajectory between the cover plate and the box body, so that the adhesive layer melts upon heating and fills the gap between the cover plate and the box body.

[0012] Furthermore, the step of applying adhesive to one side of the cover plate to form an adhesive layer includes:

[0013] Adhesive is continuously applied along a circular trajectory on one side of the cover plate to form a ring-shaped adhesive layer corresponding to the opening of the box.

[0014] Furthermore, the step of applying adhesive to one side of the cover plate to form an adhesive layer includes:

[0015] Apply adhesive at intervals along a circular trajectory on one side of the cover plate to form a ring-shaped adhesive layer with a distribution trajectory corresponding to the opening of the box.

[0016] Furthermore, before the step of performing intermittent laser welding on the contact trajectory between the cover plate and the housing to melt the adhesive layer and fill the gap between the cover plate and the housing, the method further includes:

[0017] The cover plate, which is closed together, is positioned and clamped to the box body.

[0018] Furthermore, both the cover plate and the housing are rectangular, and the contact trajectory between the cover plate and the housing includes a first wide side and a second wide side that are parallel to each other, as well as a first long side and a second long side that are parallel to each other. The step of performing intermittent laser welding on the contact trajectory between the cover plate and the housing, so that the adhesive layer melts upon heating and fills the gap between the cover plate and the housing, includes:

[0019] The first wide side and the second wide side are welded in a crisscross pattern so that the portion of the adhesive layer corresponding to the first wide side and the second wide side is heated and melted to fill the gap between the first wide side and the second wide side.

[0020] The first long side and the second long side are welded at intermittent intervals so that the portion of the adhesive layer corresponding to the first long side and the second long side is melted by heat and fills the gap between the first long side and the second long side.

[0021] Furthermore, the step of performing interlaced welding on the first wide side and the second wide side includes:

[0022] The first wide side is evenly divided into multiple first solder joint positions;

[0023] The second wide side is evenly divided into multiple second solder joint positions;

[0024] Multiple first weld points and multiple second weld points are cross-welded, with the welding of the multiple first weld points proceeding sequentially along a first direction and the welding of the multiple second weld points proceeding sequentially along a second direction, wherein the first direction and the second direction are opposite.

[0025] Furthermore, the step of performing interlaced welding on the first long side and the second long side includes:

[0026] Multiple third welding point positions are evenly spaced along the first long side;

[0027] The second long side is evenly divided into multiple fourth weld point positions;

[0028] Cross welding is performed on multiple third weld points and multiple fourth weld points, with the welding of the multiple third weld points proceeding sequentially along a third direction and the welding of the multiple fourth weld points proceeding sequentially along a fourth direction, wherein the third direction is opposite to the fourth direction.

[0029] The present invention also provides a battery packaging system for use in a battery casing, the battery casing including a cover plate and a housing, the battery packaging system comprising:

[0030] An adhesive applicator is used to apply adhesive to one side of the cover plate to form an adhesive layer.

[0031] A covering device is used to cover the box body with the side of the cover plate containing the adhesive layer, so that the adhesive layer contacts the box body;

[0032] A welding device is used to perform intermittent laser welding on the contact trajectory between the cover plate and the box body, so that the adhesive layer melts after being heated and fills the gap between the cover plate and the box body.

[0033] Furthermore, the battery packaging system also includes:

[0034] A positioning device is used to position and clamp the cover plate and the box body when they are closed together.

[0035] The present invention also provides a battery, which is obtained by the battery encapsulation method described above. The battery encapsulation method includes: applying adhesive to one side of the cover plate to form an adhesive layer; covering the side of the cover plate containing the adhesive layer onto the housing so that the adhesive layer contacts the housing; and performing interval laser welding on the contact trajectory between the cover plate and the housing so that the adhesive layer melts upon heating and fills the gap between the cover plate and the housing.

[0036] Compared to existing technologies, the battery encapsulation method provided by this invention involves applying an adhesive layer to the cover plate before welding it to the casing. Laser welding is then used to spot-weld the cover plate and casing at intervals. During welding, the adhesive layer melts upon heating and flows along the gap between the cover plate and casing, filling the gap. Therefore, the spot welding of the cover plate and casing is convenient and quick, and the adhesive layer, after re-cooling and solidifying, effectively seals the gap between the cover plate and casing. Thus, the beneficial effects of the battery encapsulation method provided by this invention include: convenient and quick operation, saving time and effort, and superior sealing performance. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A flowchart illustrating a battery packaging method provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the battery casing.

[0040] Figure 3 for Figure 2 Schematic diagram of the middle cover plate;

[0041] Figure 4 for Figure 1 A flowchart of a sub-step of step S104;

[0042] Figure 5 for Figure 4 Flowchart of a sub-step of neutron step S1041;

[0043] Figure 6 for Figure 4 Flowchart of a sub-step of neutron step S1042;

[0044] Figure 7 A structural block diagram of a battery packaging system provided for an embodiment of the present invention.

[0045] Icons: 10-Battery casing; 11-Cover plate; 12-Box; 13-Glue layer; 100-Battery encapsulation system; 110-Glue application device; 120-Covering device; 130-Positioning device; 140-Welding device. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0049] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0053] Example

[0054] Please see Figure 1 , Figure 1 The diagram shown is a flowchart of the battery packaging method provided in this embodiment. The battery packaging method provided in this embodiment is applied to, for example... Figure 2 The battery casing 10 shown, which has a cover plate 11 and a housing 12, features convenient and quick operation and better sealing. Specifically, it includes the following steps:

[0055] Step S101: Apply adhesive to one side of the cover plate 11 to form an adhesive layer 13.

[0056] The structure of the cover plate 11 coated with adhesive to form the adhesive layer 13 is as follows: Figure 3 As shown, in this embodiment, the adhesive layer 13 is annular, and its shape and structure correspond to the opening of the box 12, so as to ensure that when the cover plate 11 is closed on the box 12, the adhesive layer 13 can contact the periphery of the opening of the box 12.

[0057] In the actual glue application process, glue can be continuously applied along a circular trajectory on one side of the cover plate 11 to form a ring-shaped glue layer 13, or glue can be applied intermittently along a circular trajectory on one side of the cover plate 11 to form a ring-shaped glue layer 13. That is, the glue layer 13 can be either continuous or discontinuous.

[0058] The adhesive material is a sealant, and the thickness of the adhesive layer 13 is between 0.1 mm and 1 mm. In this embodiment, the preferred value is 0.3 mm.

[0059] Furthermore, the battery packaging method may also include:

[0060] Step S102: Cover the box body 12 with the side of the cover plate 11 containing the adhesive layer 13 so that the adhesive layer 13 is in contact with the box body 12.

[0061] In fact, after step S102 is completed and the adhesive layer 13 has cured, the cover plate 11 is then placed on the box body 12. In the closed state, the inner edge of the adhesive layer 13 contacts the outer edge of the opening of the box body 12, that is, the adhesive layer 13 is distributed circumferentially along the outer edge of the box body 12.

[0062] In other embodiments, the cover plate 11 can be closed to the box body 12 before the adhesive layer 13 has cured, so that the box body 12 and the cover plate 11 press the keratin layer, that is, the adhesive layer 13 is at least partially located between the open end face of the box body 12 and the cover plate 11.

[0063] Furthermore, the battery packaging method may also include:

[0064] Step S103: Position and clamp the closed cover plate 11 and the box body 12.

[0065] After step S102 is completed, the cover plate 11 and the box body 12 are in a closed state. In this case, the cover plate 11 and the box body 12 are positioned and fixed by using clamping fixtures or wire harness binding to prevent the cover plate 11 from shifting relative to the box body 12 during the subsequent welding process, which would affect the welding accuracy.

[0066] Furthermore, the battery packaging method may also include:

[0067] Step S104: Perform interval laser welding on the contact trajectory between the cover plate 11 and the box body 12 so that the adhesive layer 13 melts after being heated and fills the gap between the cover plate 11 and the box body 12.

[0068] In this embodiment, both the cover plate 11 and the box body 12 are rectangular. The contact trajectory between the cover plate 11 and the box body 12 refers to the distribution trajectory of the end face of the opening of the box body 12 on the cover plate 11, which includes a first wide side and a second wide side that are parallel to each other, as well as a first long side and a second long side that are parallel to each other.

[0069] Please see Figure 4 , Figure 4 The diagram shown is a flowchart of one sub-step of step S104. Step S104 may include:

[0070] In sub-step S1041, the first wide side and the second wide side are welded in a cross-interval manner so that the parts of the adhesive layer 13 corresponding to the first wide side and the second wide side are melted by heat and filled into the gaps between the first wide side and the second wide side.

[0071] In this embodiment, during welding, the two wide sides of the box body 12 and the cover plate 11 are first cross-welded, and then the two long sides are cross-welded to gradually release the welding stress and reduce the deformation of the cover plate 11 and the box body 12.

[0072] Please see Figure 5 , Figure 5 The diagram shown is a flowchart of one sub-step S1041, which may include:

[0073] Sub-step S1041a: Divide the first weld point positions evenly on the first wide side.

[0074] Sub-step S1041b divides the second wide side into multiple second solder joint positions at equal intervals.

[0075] Sub-step S1041c involves cross-welding multiple first weld point positions and multiple second weld point positions, with the welding of the multiple first weld point positions proceeding sequentially along a first direction and the welding of the multiple second weld point positions proceeding sequentially along a second direction, the first direction being opposite to the second direction.

[0076] The two wide sides are welded in opposite directions. For example, if multiple first weld points on the first wide side are welded sequentially from left to right, then multiple second weld points on the second wide side are welded sequentially from right to left, but the multiple first weld points and multiple second weld points are welded at an intersection.

[0077] Please continue reading. Figure 4 Step S104 may also include:

[0078] In sub-step S1042, the first long side and the second long side are welded in a crisscross pattern so that the parts of the adhesive layer 13 corresponding to the first long side and the second long side are melted by heat and fill the gaps between the first long side and the second long side.

[0079] In fact, after sub-step S1041 is completed, the gaps corresponding to the first wide side and the second wide side have been filled with liquid gel layer 13. When sub-step S1042 is performed, the gel layer 13 corresponding to the first long side and the second long side partially melts and flows to connect with the gel layer 13 corresponding to the first wide side and the second wide side to ensure sealing.

[0080] Please see Figure 6 , Figure 6 The diagram shown is a flowchart of one possible sub-step S1042. Sub-step S1042 may include:

[0081] Sub-step S1042a: Divide the first long side into multiple third solder joint positions at equal intervals.

[0082] Sub-step S1042b involves evenly dividing the second long side into multiple fourth solder joint positions.

[0083] Sub-step S1042c involves cross-welding multiple third weld point positions and multiple fourth weld point positions. The welding of the multiple third weld point positions is carried out sequentially along the third direction, and the welding of the multiple fourth weld point positions is carried out sequentially along the fourth direction. The third direction and the fourth direction are opposite.

[0084] In summary, the battery encapsulation method provided in this embodiment forms an adhesive layer 13 by pre-applying adhesive to the cover plate 11. Before welding, the cover plate 11 and the housing 12 are positioned and clamped to prevent displacement and ensure welding accuracy. Laser welding is used for intermittent spot welding when welding the cover plate 11 and the housing 12, reducing welding difficulty and saving time and effort. Furthermore, during welding, the adhesive layer 13 melts and fills the gap between the cover plate 11 and the housing 12, forming a seal after curing, resulting in excellent sealing performance.

[0085] Therefore, the battery encapsulation method provided in this embodiment is convenient and quick to operate, saves time and effort, and has a better sealing effect.

[0086] This embodiment also provides a battery packaging system 100, please refer to [link / reference]. Figure 7 , Figure 7 The diagram shown is a structural block diagram of the battery packaging system 100. The battery packaging system 100 provided in this embodiment is applied to applications such as... Figure 2 The battery casing 10 shown includes a cover plate 11 and a housing 12. The battery encapsulation system 100 includes an adhesive applicator 110, a cover fitting device 120, a positioning device 130, and a welding device 140.

[0087] The adhesive applicator 110 is used to apply adhesive to one side of the cover plate 11 to form an adhesive layer 13. In fact, the adhesive applicator 110 is used to perform step S101 of the aforementioned battery encapsulation method.

[0088] The capping device 120 is used to cover the side of the cover plate 11 containing the adhesive layer 13 onto the housing 12, so that the adhesive layer 13 contacts the housing 12. In fact, the capping device 120 is used to perform step S102 of the aforementioned battery encapsulation method.

[0089] The positioning device 130 is used to position and clamp the closed cover plate 11 and the housing 12. In fact, the positioning device 130 is used to perform step S103 of the aforementioned battery packaging method.

[0090] The welding device 140 is used to perform intermittent laser welding on the contact trajectory between the cover plate 11 and the housing 12, so that the adhesive layer 13 melts upon heating and fills the gap between the cover plate 11 and the housing 12. In fact, the welding device 140 is used to perform step S104 and its related sub-steps of the aforementioned battery encapsulation method.

[0091] Therefore, the battery packaging system 100 provided in this embodiment is convenient and quick to operate, saves time and effort, and has a better sealing effect.

[0092] This embodiment also provides a battery, which is obtained by the aforementioned battery encapsulation method. This battery has better sealing performance and a convenient and quick encapsulation process.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery packaging method, characterized in that, Applied to a battery casing, the battery casing including a cover and a housing, the battery encapsulation method includes: Apply adhesive to one side of the cover plate to form an adhesive layer; The side of the cover plate containing the adhesive layer is placed on the box body so that the adhesive layer contacts the box body. Both the cover plate and the box body are rectangular. The contact trajectory between the cover plate and the box body includes a first wide side and a second wide side that are parallel to each other, as well as a first long side and a second long side that are parallel to each other. Performing interval laser welding on the contact trajectory between the cover plate and the box body includes: first performing cross welding on the first wide side and the second wide side, and then performing cross welding on the first long side and the second long side. The cross welding of the first wide side and the second wide side includes: The first wide side is evenly divided into multiple first solder joint positions; The second wide side is evenly divided into multiple second solder joint positions; Cross welding is performed on the plurality of first weld points and the plurality of second weld points, and the welding of the plurality of first weld points is performed sequentially along a first direction, and the welding of the plurality of second weld points is performed sequentially along a second direction, wherein the first direction and the second direction are opposite. The cross welding of the first long side and the second long side includes: Multiple third welding point positions are evenly spaced along the first long side; The second long side is evenly divided into multiple fourth weld point positions; Cross welding is performed on the plurality of third weld points and the plurality of fourth weld points, with the welding of the plurality of third weld points proceeding sequentially along a third direction and the welding of the plurality of fourth weld points proceeding sequentially along a fourth direction, wherein the third direction is opposite to the fourth direction.

2. The battery packaging method according to claim 1, characterized in that, The step of applying adhesive to one side of the cover plate to form an adhesive layer includes: Adhesive is continuously applied along a circular trajectory on one side of the cover plate to form a ring-shaped adhesive layer corresponding to the opening of the box.

3. The battery packaging method according to claim 1, characterized in that, The step of applying adhesive to one side of the cover plate to form an adhesive layer includes: Apply adhesive at intervals along a circular trajectory on one side of the cover plate to form a ring-shaped adhesive layer with a distribution trajectory corresponding to the opening of the box.

4. The battery packaging method according to claim 1, characterized in that, Before performing interval laser welding on the contact trajectory between the cover plate and the housing, the method further includes: The cover plate, which is closed together, is positioned and clamped to the box body.

5. The battery packaging method according to claim 1, characterized in that, The thickness of the gelatinous layer is between 0.1 mm and 1 mm.

6. A battery packaging system, characterized in that, Applied to a battery casing, the battery casing including a cover and a housing, the battery encapsulation system includes: An adhesive applicator is used to apply adhesive to one side of the cover plate to form an adhesive layer. A covering device is used to cover the side of the cover plate containing the adhesive layer onto the box body. Both the cover plate and the box body are rectangular. The contact trajectory between the cover plate and the box body includes a first wide side and a second wide side that are parallel to each other, as well as a first long side and a second long side that are parallel to each other. A welding device is used to perform intermittent laser welding on the contact trajectory between the cover plate and the box body, including: first performing cross welding on the first wide side and the second wide side, and then performing cross welding on the first long side and the second long side; The cross welding of the first wide side and the second wide side includes: The first wide side is evenly divided into multiple first solder joint positions; The second wide side is evenly divided into multiple second solder joint positions; Cross welding is performed on the plurality of first weld points and the plurality of second weld points, and the welding of the plurality of first weld points is performed sequentially along a first direction, and the welding of the plurality of second weld points is performed sequentially along a second direction, wherein the first direction and the second direction are opposite. The cross welding of the first long side and the second long side includes: Multiple third welding point positions are evenly spaced along the first long side; The second long side is evenly divided into multiple fourth weld point positions; Cross welding is performed on the plurality of third weld points and the plurality of fourth weld points, with the welding of the plurality of third weld points proceeding sequentially along a third direction and the welding of the plurality of fourth weld points proceeding sequentially along a fourth direction, wherein the third direction is opposite to the fourth direction.

7. The battery packaging system according to claim 6, characterized in that, The battery packaging system also includes: A positioning device is used to position and clamp the cover plate and the box body when they are closed together.

8. A battery, characterized in that, This includes batteries encapsulated by the battery encapsulation method according to any one of claims 1-5.

9. A battery casing, characterized in that, The battery casing is obtained by the battery encapsulation method according to any one of claims 1-5. The battery casing includes a cover plate, a housing, and an adhesive layer that has been laser-welded, heat-melted, cooled, and cured at intervals. The adhesive layer is distributed circumferentially along the outer edge of the housing and is used to fill the gap between the cover plate and the housing when they are closed. Both the cover plate and the housing are rectangular. The positions of the laser welds between the cover plate and the housing are set on the contact trajectory between the cover plate and the housing. The contact trajectory between the cover plate and the housing includes a first wide side and a second wide side that are parallel to each other, and a first long side and a second long side that are parallel to each other. The first wide side is evenly divided into multiple first weld point positions, the second wide side is evenly divided into multiple second weld point positions, the first long side is evenly divided into multiple third weld point positions, and the second long side is evenly divided into multiple fourth weld point positions.

10. The battery casing according to claim 9, characterized in that, The thickness of the gelatinous layer is between 0.1 mm and 1 mm.

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