Gradient roll-over battery

Abstract

The gradient crimping battery of the present application is provided with a battery top shell, a sealing shell set and a cell set. In actual application, due to the provision of a plurality of crimping groups, each crimping group comprises a plurality of levels of crimping, the curvature of each level of crimping gradually decreases or gradually increases, and the level of crimping with the largest curvature is used to hold the sealing ring body to the step edge, that is, the level of crimping with the largest curvature is used to tighten the battery top shell, preventing the relative displacement of the battery top shell relative to the battery shell, preventing the change of the height of the gradient crimping battery, and in combination with the remaining levels of crimping, the remaining levels of crimping are used to assist in enhancing the structural force of the gradient crimping battery, making the structural stability of the gradient crimping battery stronger, so that the gradient crimping battery is not easy to deform, greatly prolonging the service life of the gradient crimping battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a gradient crimping battery. BACKGROUND

[0002] At present, the battery refers to the cup, groove or other container or part of the composite container containing electrolyte solution and metal electrode to generate current, which can convert chemical energy into electrical energy. It is divided into positive and negative. With the progress of science and technology, the battery refers to a small device that can generate electrical energy. Such as solar cell. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as the energy source, a current with stable voltage, stable current, long time stable power supply, little affected by the outside world can be obtained, and the battery structure is simple, convenient to carry, easy to charge and discharge, not affected by the outside climate and temperature, stable and reliable in performance, and plays a great role in various aspects of modern social life.

[0003] For the existing battery, in order to improve the safety performance of the battery and improve the material removal of the battery sealing process, some battery manufacturers have carried out local crimping sealing of the battery. Although the above method can complete the sealing of the battery and improve the safety and explosion-proof performance of the battery, the structural stability of the battery after sealing is not strong. Since the local sealing method is used, the height of the battery is not easy to control, that is, the battery top shell in the battery and the battery shell are easy to move relatively, and the battery top shell is easy to be separated from the battery shell under certain conditions, for example, when the internal pressure of the battery is at a certain value, due to the local sealing of the battery, the battery top shell is easy to move relatively under the action of the internal pressure. The battery shell, thereby causing damage to the battery; in addition, the battery with local sealing is not easy to deform, thereby causing damage to the battery. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings in the prior art, provide a gradient crimping battery which is not easy to change in height, not easy to move relatively between the battery top shell and the battery shell, strong in structural stability, not easy to deform and long in service life.

[0005] The purpose of the present application is achieved by the following technical scheme:

[0006] A gradient crimping battery comprises:

[0007] A battery top shell is provided with a stepped edge on the battery top shell;

[0008] The application discloses a battery shell set, a sealing ring body and a plurality of edge-rolling groups.

[0009] The application discloses a battery shell set, a sealing ring body and a plurality of edge-rolling groups.

[0010] In one of the embodiments, the battery core set further comprises a first isolation piece arranged between the bare battery core and the first tab.

[0011] In one of the embodiments, the battery core set further comprises a second isolation piece arranged between the bare battery core and the second tab.

[0012] In one of the embodiments, the bare battery core is a winding type bare battery core.

[0013] In one of the embodiments, the bare battery core is a laminated type bare battery core.

[0014] In one of the embodiments, the first tab is resistance-welded to the battery top shell, and the second tab is resistance-welded to the battery shell.

[0015] In one of the embodiments, the sealing ring body is a PEEK sealing ring body.

[0016] In one of the embodiments, the sealing ring body is a PEK sealing ring body.

[0017] In one of the embodiments, the sealing ring body is a PI sealing ring body.

[0018] In one of the embodiments, the melting point of the sealing ring body is 100-500 DEG C.

[0019] Compared with the prior art, the application has the following advantages and beneficial effects:

[0020] The gradient crimping battery of the present application is provided with a battery top shell, a sealing shell set and a cell set. In actual application, a plurality of crimping groups are provided, each crimping group comprising a plurality of crimping levels, the crimping curvature of each crimping level gradually decreasing or gradually increasing, wherein the crimping level with the largest crimping curvature is used to hold the sealing ring body to the step edge, i.e. the crimping level with the largest crimping curvature is used to tighten the battery top shell, preventing the relative displacement of the battery top shell relative to the battery shell, preventing the battery height of the gradient crimping battery from changing, and in combination with the remaining crimping levels, the remaining crimping levels are used to assist in enhancing the structural force of the gradient crimping battery, making the structural stability of the gradient crimping battery stronger, so that the gradient crimping battery is not easy to deform, greatly prolonging the service life of the gradient crimping battery. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 The assembly structure diagram of the gradient crimping battery in an embodiment of the present application;

[0023] Figure 2 The internal structure diagram of the gradient crimping battery in an embodiment of the present application;

[0024] Figure 3 The Figure 2 The enlarged schematic view at A;

[0025] Figure 4 The exploded view of the gradient crimping battery in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "left", "right", and the like are merely used for the purpose of illustration and are not intended to be limiting.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] It should be noted that for the existing battery, some battery manufacturers in order to reduce the difficulty of battery sealing and improve the sealing rate of the battery, only the local sealing of the battery is carried out when the battery is sealed, that is, the local edge sealing sealing mode is adopted to complete the sealing work of the battery, so that the battery top shell can be stably fixed in the battery shell. Although the above-mentioned method can complete the sealing of the battery, the structural stability of the battery after sealing is not strong. Since the local sealing method is adopted, the structural stability of the battery is questionable, and the battery top shell and the battery shell are important components for packaging and protecting the battery. If the battery top shell and the battery shell in the battery are prone to relative displacement, for example, when the internal pressure of the battery is at a certain value, due to the local sealing of the battery, the battery top shell is prone to move relative to the battery shell under the action of the internal pressure, thereby causing damage to the battery. We all know that the battery has battery electrolyte, which is a chemical liquid with certain corrosive properties. If the battery top shell moves relative to the battery shell under the action of the internal pressure, the electrolyte in the battery is likely to leak to the outside environment, polluting the environment and possibly endangering the personal safety of the user of the battery. In addition, due to the local sealing of the battery, the structural stability of the battery is not strong, and the battery is prone to deformation, which also leads to the damage of the battery.

[0030] Therefore, based on the above problems, this application discloses a gradient rolled edge battery including a battery top shell, a sealing kit, and a cell kit. The battery top shell has a stepped edge; the sealing kit includes a battery outer shell, a sealing ring, and several rolled edge groups. A cell housing cavity is formed inside the battery outer shell, and the sealing ring is disposed within the cell housing cavity. Each rolled edge group is disposed on the battery outer shell. In one rolled edge group, the rolled edge group includes several layers of rolled edges, with the curvature of each layer gradually decreasing or increasing. The layer with the largest curvature is used to support the sealing ring to the stepped edge. The cell kit includes a bare cell, a first tab, and a second tab. The bare cell is disposed within the cell housing cavity. The first tab is connected to both the bare cell and the battery top shell, and the second tab is connected to both the bare cell and the battery outer shell. Therefore, it should be noted that, due to the presence of several rolled edge groups, each group includes several layers of rolled edges. The curvature of each layer of rolled edges gradually decreases or increases. The layer with the largest curvature is used to support the sealing ring body to the edge of the step, that is, the layer with the largest curvature is used to fasten the top shell of the battery, preventing relative displacement between the top shell and the outer shell of the battery, and preventing changes in the battery height of the gradient rolled edge battery. Combined with the other layers of rolled edges, which are used to help enhance the structural force of the gradient rolled edge battery, the structural stability of the gradient rolled edge battery is further strengthened, making the gradient rolled edge battery less prone to deformation and greatly extending its service life.

[0031] For a clearer explanation of the principle of the gradient rolled-edge battery in this application, please refer to the following: Figure 1 and Figure 2 A gradient rolled edge battery 10 includes a battery top shell 100, a sealing kit 200, and a cell kit 300.

[0032] Therefore, it should be noted that both the battery top shell 100 and the casing kit 200 serve to encapsulate and protect the internal components of the gradient rolled edge battery 10 from damage; the cell kit 300 serves to store electrical energy. When the gradient rolled edge battery 10 is connected to an external electrical device, the cell kit 300 transfers the stored electrical energy to the external electrical device to power it and enable the external electrical device to work normally.

[0033] Please see Figure 3 The battery top cover 100 is provided with a stepped edge 110.

[0034] Therefore, it should be noted that the battery top shell 100 serves to encapsulate and protect the battery; the stepped edge 110 is used to cooperate with the relevant components or structures of the sealing kit 200 to complete the sealing work of the gradient rolled edge battery 10.

[0035] Please refer to the following: Figure 1 , Figure 3 and Figure 4, the shell set 200 includes a battery shell 210, a sealing ring body 220 and a plurality of crimping groups 230, the battery shell 210 is provided with a battery cell accommodating cavity, the sealing ring body 220 is arranged in the battery cell accommodating cavity, and each crimping group 230 is arranged on the battery shell 100; in one crimping group 230, the crimping group 230 includes a plurality of hierarchical crimpings 231, the curvatures of the hierarchical crimpings 231 gradually decrease or gradually increase, and the hierarchical crimping 231 with the largest curvature is used to hold the sealing ring body 220 to the stepped edge 110.

[0036] Therefore, it needs to be explained that, due to the arrangement of the plurality of crimping groups 230, the crimping group 230 includes a plurality of hierarchical crimpings 231, the curvatures of the hierarchical crimpings 231 gradually decrease or gradually increase, for example, the curvatures of the hierarchical crimpings 231 gradually decrease or gradually increase along the clockwise direction or the counterclockwise direction, the hierarchical crimping 231 with the largest curvature is used to hold the sealing ring body 220 to the stepped edge 110, that is, the hierarchical crimping 231 with the largest curvature is used to fasten the battery top shell 100, prevent the relative displacement of the battery top shell 100 relative to the battery shell 210, and prevent the gradient crimping battery 10 from changing in height; in combination with the remaining hierarchical crimpings, the remaining hierarchical crimpings 231 are used to assist in enhancing the structural force of the gradient crimping battery 10, so that the structural stability of the gradient crimping battery 10 is stronger, the gradient crimping battery 10 is not easy to deform, and the service life of the gradient crimping battery 10 is greatly prolonged.

[0037] It also needs to be explained that, please refer to Figure 3 In the present application, the crimping group 230 includes two hierarchical crimpings 231, namely hierarchical crimping 231-1 and hierarchical crimping 231-2, wherein the curvature of the hierarchical crimping 231-1 is greater than that of the hierarchical crimping 231-2, that is, the hierarchical crimping 231-1 is used to hold the sealing ring body 220 to the stepped edge 110, fasten the hierarchical crimping 231-1 to the battery top shell 100, prevent the relative displacement of the battery top shell 100 relative to the battery shell 210, and prevent the gradient crimping battery 10 from changing in height; the hierarchical crimping 231-2 is used to assist in enhancing the structural force of the gradient crimping battery 10, so that the structural stability of the gradient crimping battery 10 is stronger, the gradient crimping battery 10 is not easy to deform, and the service life of the gradient crimping battery 10 is greatly prolonged. Secondly, in addition to the function of enhancing the structural force of the gradient crimping battery 10, when the internal pressure of the gradient crimping battery 10 is too large, under the action of the internal pressure, the hierarchical crimping 231-2 will be folded outward to form a pressure relief channel, release the excessive pressure inside the gradient crimping battery 10, complete the self-pressure relief process of the gradient crimping battery 10, and greatly improve the safety of the gradient crimping battery 10.

[0038] Please refer toFigure 3 The bare cell 310 is arranged in the cell accommodating cavity, the first tab 320 is connected with the bare cell 310 and the battery top shell 100 respectively, and the second tab 330 is connected with the bare cell 310 and the battery outer shell 210 respectively.

[0039] Therefore, it should be noted that the bare cell 310 plays a role of storing electric energy, and when the gradient crimped battery 10 is connected with an external electrical equipment, the bare cell 310 transmits the stored electric energy to the external electrical equipment to supply power for the external electrical equipment, so that the external electrical equipment can work normally; the first tab 320 and the second tab 330 both serve as electrodes of the gradient crimped battery 10, and are used to connect the external electrical equipment to transmit the voltage in the bare cell 310 to the external electrical equipment.

[0040] Further, in an embodiment, the cell assembly 300 further comprises a first isolation piece arranged between the bare cell 310 and the first tab 320.

[0041] Therefore, it should be noted that the first isolation piece plays a role of isolation to prevent the first tab 320 from being short-circuited by contacting the bare cell 310; in addition, the first isolation piece can also play a role of heat insulation to prevent the heat generated when the first tab 320 is welded from damaging the bare cell 310.

[0042] Further, in an embodiment, the cell assembly 300 further comprises a second isolation piece arranged between the bare cell 310 and the second tab.

[0043] Therefore, it should be noted that the second isolation piece plays a role of isolation to prevent the second tab 330 from being short-circuited by contacting the bare cell 310; in addition, the second isolation piece can also play a role of heat insulation to prevent the heat generated when the second tab 330 is welded from damaging the bare cell 310.

[0044] Further, in an embodiment, the bare cell 310 is a jelly-roll type bare cell.

[0045] Therefore, it should be noted that the bare cell 310 is a jelly-roll type bare cell, and the specific structure and principle of the jelly-roll type bare cell will not be described in detail, which is well known to those skilled in the art.

[0046] Further, in an embodiment, the bare cell is a laminated type bare cell.

[0047] Therefore, it should be noted that the bare cell 310 can also be a laminated type bare cell, and the specific structure and principle of the laminated type bare cell will not be described in detail, which is well known to those skilled in the art.

[0048] Further, in an embodiment, the first tab 310 is resistance-welded to the battery top shell 100, and the second tab 330 is resistance-welded to the battery shell 210.

[0049] It should be noted that, after the welding and sealing of the gradient crimped battery 10 is completed, the first tab 320 is resistance-welded to the battery top shell 100. Specifically, after the first tab 320 and the battery top shell 100, and the second tab 330 and the battery bottom shell 210 are attached, the double-needle welding head contacts the battery top shell 100 and the battery bottom shell 210, and electricity is supplied to complete the resistance welding.

[0050] It should be further noted that, compared with laser welding parallel seam welding, the resistance welding has the following advantages: generally, laser welding requires overall pressure on the welded parts, and requires excellent flatness and contact. If electrolyte enters the welding area, it will cause explosive welding and damage the internal core. The resistance welding directly applies pressure to the welding point through the welding electrode, which can squeeze out the liquid at the welding interface to improve the contact and avoid explosive welding, thereby achieving better welding effect. The welding head can conduct heat, and the welding temperature is lower to avoid damage to the battery.

[0051] Further, in an embodiment, the sealing ring body 220 is a PEEK sealing ring body.

[0052] It should be noted that the specific material of the sealing ring body 220 can be flexibly set according to actual conditions, for example, PEEK material; for example, PEK material; for example, PI material. Specifically, the melting point of the sealing ring body 220 is 100℃-500℃. It should be noted that the melting point of the sealing ring body 220 can be flexibly set in combination with actual conditions, and is preferably 100℃-500℃.

[0053] The gradient crimped battery of the present application is provided with a battery top shell, a shell sleeve and a cell sleeve. In actual application, due to the provision of a plurality of crimping groups, each crimping group includes a plurality of levels of crimping, and the curvature of each level of crimping gradually decreases or gradually increases. The level of crimping with the largest curvature is used to hold the sealing ring body to the step edge, i.e., the level of crimping with the largest curvature is used to tighten the battery top shell, preventing the relative displacement of the battery top shell relative to the battery shell, and preventing the battery height of the gradient crimped battery from changing. In combination with the remaining levels of crimping, the remaining levels of crimping are used to assist in enhancing the structural strength of the gradient crimped battery, making the structural stability of the gradient crimped battery stronger, so that the gradient crimped battery is not easy to deform, greatly prolonging the service life of the gradient crimped battery.

[0054] The above described embodiments only express several embodiments of the present application, which are described in more detail and in more detail, but cannot be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A gradient crimped battery, characterized by, The application relates to a battery, which comprises the following parts: a battery top shell, wherein a stepped edge is arranged on the battery top shell; a sealing shell set, which comprises a battery shell, a sealing ring body and a plurality of edge curl groups, the battery shell is internally provided with a battery cell accommodating cavity, the sealing ring body is arranged in the battery cell accommodating cavity, each edge curl group is arranged on the battery shell, in one edge curl group, the edge curl group comprises a plurality of hierarchical edge curls, the edge curl curvatures of the hierarchical edge curls gradually decrease or gradually increase along a circumferential direction, wherein the hierarchical edge curl with the largest edge curl curvature is used for supporting the sealing ring body on the stepped edge, and the remaining hierarchical edge curls are used for assisting in enhancing the structural force of the gradient edge curl battery, under the action of internal pressure, the remaining hierarchical edge curls are folded outward to form pressure relief channels; and a battery cell set, which comprises a bare battery cell, a first tab and a second tab, the bare battery cell is arranged in the battery cell accommodating cavity, the first tab is connected with the bare battery cell and the battery top shell respectively, and the second tab is connected with the bare battery cell and the battery shell respectively.

2. The gradient roll-over battery of claim 1, wherein, The battery cell set further comprises a first isolation piece, which is arranged between the bare battery cell and the first tab.

3. The gradient roll-over battery of claim 1, wherein, The battery cell set further comprises a second isolation piece, which is arranged between the bare battery cell and the second tab.

4. The gradient roll-over battery of claim 1, wherein, The bare battery cell is a winding type bare battery cell.

5. The gradient crimped battery of claim 1, wherein, The bare battery cell is a laminated type bare battery cell.

6. The gradient roll-over battery of claim 1, wherein, The first tab is resistance-welded with the battery top shell, and the second tab is resistance-welded with the battery shell.

7. The gradient roll-over battery of claim 1, wherein, The sealing ring body is a PEEK sealing ring body.

8. The gradient roll-over battery of claim 1, wherein, The sealing ring body is a PEK sealing ring body.

9. The gradient roll-over battery of claim 1, wherein, The sealing ring body is a PI sealing ring body.

10. The gradient crimped battery of any one of claims 7-9, wherein, The melting point of the sealing ring body is 100 DEG C-500 DEG C.

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