Battery, preparation method and electronic equipment

Abstract

The invention discloses a battery, a preparation method and electronic equipment. The battery comprises a shell, a cover body assembly, a roll core and a sealing element, wherein the shell is provided with an opening part; the cover body assembly is arranged on the opening part in a covering manner, and the cover body assembly and the shell are enclosed to form an accommodating space; a liquid injection hole is formed in the middle position of the cover body assembly; the roll core is arranged in the accommodating space, and the roll core is provided with a central hole; the liquid injection hole is communicated with the central hole; and the sealing piece seals the liquid injection hole and is in sealing connection with the cover body assembly.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and more specifically, to a battery, a preparation method and an electronic device. Background Art

[0002] With the rapid development of science and technology, batteries, as important devices for energy storage and conversion, are increasingly widely used in various electronic devices.

[0003] At present, in the sealing process of traditional laser welded steel shell batteries, the battery cell is generally first filled with liquid and left to stand, and then the cap is attached to the mouth of the steel shell and the two are welded and sealed. In the above sealing process, the electrolyte is easily squeezed out when the cap is closed on the mouth of the steel shell after the liquid is filled, and the proportion of poor sealing and poor appearance is increased, thereby increasing the manufacturing cost.

[0004] In view of this, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0005] One object of the present application is to provide a new technical solution for a battery, a preparation method and an electronic device.

[0006] According to a first aspect of the present application, a battery is provided, comprising:

[0007] a housing having an opening;

[0008] A cover assembly, the cover assembly is covered on the opening, and the cover assembly and the shell are combined to form an accommodating space; the cover assembly is provided with a liquid injection hole at a middle position thereof;

[0009] A winding core, the winding core is arranged in the accommodating space, the winding core has a central hole; the injection hole is connected to the central hole;

[0010] A sealing member is provided, wherein the sealing member blocks the liquid injection hole and forms a sealing connection with the cover assembly.

[0011] Optionally, the cover assembly includes a cover plate, a conductive member and an insulating ring, a positioning hole is opened in the middle of the cover plate, the conductive member is partially inserted into the positioning hole and the cover plate and the conductive member are spaced apart, and the insulating ring is arranged between the cover plate and the conductive member;

[0012] The conductive member is protruding from the cover plate, and the injection hole is opened at the center of the conductive member.

[0013] Optionally, the cover plate, the conductive member and the insulating ring are connected by hot pressing.

[0014] Optionally, the edge of the cover plate is connected to the shell by welding; and the sealing member is connected to the conductive member by welding.

[0015] Optionally, the conductive member is provided with a positioning groove around the injection hole, the sealing member comprises a sealing plug and a positioning platform, the sealing plug is inserted into the injection hole, and the positioning platform is welded to the conductive member at the positioning groove.

[0016] Optionally, the positioning groove is arranged higher than the opening.

[0017] Optionally, the battery includes a first pole lug, the first pole lug is spaced apart from the central hole, and the first pole lug is electrically connected to the conductive member.

[0018] Optionally, the battery includes a second pole lug, and the second pole lug is electrically connected to the shell.

[0019] According to a second aspect of the present application, a method for preparing the battery according to the first aspect is provided, the method comprising:

[0020] Providing a housing having an opening;

[0021] placing the winding core into the housing through the opening;

[0022] The cover assembly is placed on the opening, and the cover assembly is welded to the shell;

[0023] Injecting electrolyte into the central hole of the winding core through the injection hole of the cover assembly;

[0024] The sealing member is used to seal the liquid injection hole, and the sealing member is connected to the cover assembly by welding.

[0025] Optionally, before injecting the electrolyte into the central hole of the winding core through the injection hole of the cover assembly, the preparation method further includes:

[0026] The core is baked at a temperature ranging from 85°C to 95°C.

[0027] According to a third aspect of the present application, an electronic device is provided, wherein the electronic device comprises the battery as described in the first aspect.

[0028] Since the battery provided in the embodiment of the present application has an injection hole on the cover assembly, in the process of sealing and assembling the battery, the shell and the cover assembly can be welded first and then the electrolyte can be injected through the injection hole, thereby avoiding electrolyte overflow and poor battery appearance, improving the sealing and yield rate of the battery, and reducing the manufacturing cost of the battery.

[0029] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0031] Figure 1 is a schematic diagram of an exploded structure of a battery according to an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the overall structure of a battery according to an embodiment of the present application;

[0033] Figure 3 is a schematic diagram of a cross-sectional structure of a battery according to an embodiment of the present application Figure 1 ;

[0034] Figure 4 is a schematic diagram of a cross-sectional structure of a battery according to an embodiment of the present application Figure 2 .

[0035] Description of reference numerals:

[0036] 1. Battery; 11. Shell; 110. Opening; 12. Cover assembly; 120. Liquid injection hole; 121. Cover plate; 122. Conductive member; 1220. Positioning groove; 123. Insulating ring; 13. Winding core; 130. Center hole; 14. Sealing member; 141. Sealing plug; 142. Positioning platform; 15. First pole ear; 16. Second pole ear; 17. Insulating pad. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] Reference Figure 1-Figure 4 As shown, according to one embodiment of the present application, a battery 1 is provided. The battery 1 includes a shell 11, a cover assembly 12, a winding core 13 and a sealing member 14, wherein the shell 11 has an opening 110; the cover assembly 12 is disposed on the opening 110, and the cover assembly 12 and the shell 11 are enclosed to form an accommodation space; the cover assembly 12 is provided with a liquid injection hole 120 at a central position thereof; the winding core 13 is disposed in the accommodation space, and the winding core 13 has a central hole 130; the liquid injection hole 120 is communicated with the central hole 130; the sealing member 14 blocks the liquid injection hole 120 and forms a sealed connection with the cover assembly 12.

[0043] In the battery 1 provided in the embodiment of the present application, a liquid injection hole 120 is provided on the cover assembly 12, and electrolyte can be injected through the liquid injection hole 120; therefore, in the process of sealing and assembling the battery 1, the cover assembly 12 can be first covered at the opening 110 of the shell 11 and welded to the shell 11, and then the electrolyte is injected through the liquid injection hole 120 provided by the cover assembly 12, thereby avoiding the situation where electrolyte is injected first and then the cover assembly 12 is covered, which may cause electrolyte overflow. In addition, if electrolyte is injected first and then the cover assembly 12 and the shell 11 are welded, it is easy to cause fire during welding, resulting in poor sealing and poor appearance of the battery; the battery 1 provided in the embodiment of the present application can avoid this situation.

[0044] In summary, since the battery 1 provided in the embodiment of the present application has a liquid injection hole 120 on the cover assembly 12, in the process of sealing and assembling the battery 1, the shell 11 and the cover assembly 12 can be welded first and then the electrolyte can be injected through the liquid injection hole 120, thereby avoiding electrolyte overflow and poor battery appearance, improving the battery's sealing and yield rate, and reducing the battery's manufacturing cost.

[0045] Moreover, in the battery 1 provided in the embodiment of the present application, since the injection hole 120 for injecting electrolyte is connected to the central hole 130 of the winding core 13, the electrolyte can enter the central hole 130 of the winding core 13 through the injection hole 120, thereby increasing the wetting speed and degree of the winding core 13, improving the injection efficiency and reducing the injection time.

[0046] Reference Figure 3-Figure 4As shown, in one embodiment, the cover assembly 12 includes a cover plate 121, a conductive member 122 and an insulating ring 123. A positioning hole is opened in the middle of the cover plate 121, the conductive member 122 is partially inserted into the positioning hole, and the cover plate 121 and the conductive member 122 are spaced apart, and the insulating ring 123 is arranged between the cover plate 121 and the conductive member 122;

[0047] The conductive member 122 is protruded from the cover plate 121 , and the injection hole 120 is opened at the center of the conductive member 122 .

[0048] In this specific example, the first part of the conductive member 122 is inserted into the positioning hole of the cover plate 121 and is spaced apart from the cover plate 121, and the second part of the conductive member 122 is opposite to the cover plate 121 and is spaced apart from the cover plate 121; the insulating ring 123 is disposed between the cover plate 121 and the conductive member 122. In addition, the first part of the conductive member 122 is protruding from the cover plate 121 in the thickness direction, and the injection hole 120 is opened at the center of the conductive member 122, thereby further effectively improving the problem of electrolyte overflow and ensuring the liquid retention of the battery.

[0049] Furthermore, the diameter of the injection hole 120 is greater than or equal to 1 mm to facilitate the injection of the electrolyte.

[0050] Furthermore, the cover plate 121 , the conductive member 122 and the insulating ring 123 are connected together by hot pressing and laminating, which can not only improve the firmness of the connection but also ensure that the overall performance of the cover assembly 12 is stable and reliable.

[0051] Reference Figure 3-Figure 4 As shown, in one embodiment, the edge of the cover plate 121 is connected to the housing 11 by welding; and the sealing member 14 is connected to the conductive member 122 by welding.

[0052] In this specific example, the edge of the cover plate 121 and the shell 11 are sealed by 360° circumferential welding at the opening 110 by laser welding, and the seal 14 and the conductive member 122 are also connected by laser welding to ensure the sealing performance of the battery.

[0053] Reference Figure 3-Figure 4 As shown, in one embodiment, the conductive member 122 is provided with a positioning groove 1220 around the injection hole 120, and the sealing member 14 includes a sealing plug 141 and a positioning platform 142, the sealing plug 141 is inserted into the injection hole 120, and the positioning platform 142 is welded to the conductive member 122 at the positioning groove 1220.

[0054] In this specific example, the sealing plug 141 of the sealing member 14 is inserted into the injection hole 120, the positioning platform 142 of the sealing member 14 is positioned and connected to the conductive member 122 at the positioning groove 1220, and the positioning platform 142 is welded to the conductive member 122, specifically by laser welding to perform 360° circumferential welding and sealing; thereby not only ensuring the reliability of the connection between the sealing member 14 and the conductive member 122, but also improving the sealing performance of the battery 1.

[0055] Reference Figure 4 As shown, in one embodiment, the positioning groove 1220 is arranged higher than the opening 110 .

[0056] In this specific example, since the positioning platform 142 of the seal 14 is welded to the conductive member 122 at the positioning groove 1220, and the height of the electrolyte is lower than the opening 110 or at most flush with the opening 110, the positioning groove 1220 is set higher than the opening 110 to avoid interference between the seal 14 and the conductive member 122 and the electrolyte during welding, thereby improving the welding yield and welding efficiency.

[0057] Reference Figure 3-Figure 4 As shown, in one embodiment, the battery includes a first pole lug 15 , the first pole lug 15 is spaced apart from the central hole 130 , and the first pole lug 15 is electrically connected to the conductive member 122 .

[0058] In this specific example, the first pole tab 15 is led out from the winding core 13 and connected to the conductive member 122 by laser welding; wherein the portion of the first pole tab 15 located at the end surface of the winding core 13 is smaller than the radius of the winding core 13, that is, a distance is separated between the first pole tab 15 and the center hole 130, thereby avoiding interference between the first pole tab 15 and the center hole 130 and the injection hole 120 to affect the injection. For example, the first pole tab 15 is a positive pole tab.

[0059] Reference Figure 3-Figure 4 As shown, in one embodiment, the battery includes a second pole tab 16 , and the second pole tab 16 is electrically connected to the housing 11 .

[0060] In this specific example, the second pole tab 16 is electrically connected to the shell 11 by laser welding or resistance welding; for example, the second pole tab 16 is a negative pole tab.

[0061] Furthermore, insulating pads 17 are provided corresponding to the two end surfaces of the winding core 13 to improve the reliability of the battery 1 .

[0062] According to another embodiment of the present application, a method for preparing the battery as described above is provided, the method comprising:

[0063] A housing 11 is provided, wherein the housing 11 has an opening 110;

[0064] The winding core 13 is placed into the housing 11 through the opening 110 ;

[0065] The cover assembly 12 is covered on the opening 110, and the cover assembly 12 is connected to the housing 11 by welding;

[0066] Injecting electrolyte into the central hole 130 of the winding core 13 through the injection hole 120 of the cover assembly 12;

[0067] The sealing member 14 is used to seal the liquid injection hole 120 , and the sealing member 14 is connected to the cover assembly 12 by welding.

[0068] In the battery preparation method provided in the embodiment of the present application, the shell 11 placed in the winding core 13 is first welded to the cover assembly 12, and then the electrolyte is injected into the central hole 130 of the winding core 13 through the injection hole 120 of the cover assembly 12, that is, the cover is closed first and then the liquid is injected, so as to avoid the overflow of the electrolyte; and improve the sealing yield and appearance yield of the battery.

[0069] In addition, the electrolyte can enter the central hole 130 of the winding core 13 through the injection hole 120, thereby increasing the wetting speed and degree of the winding core 13, improving the injection efficiency, and reducing the injection time.

[0070] Reference Figure 1-Figure 2 As shown, in one embodiment, before injecting the electrolyte into the central hole 130 of the winding core 13 through the injection hole 120 of the cover assembly 12, the preparation method further includes:

[0071] The winding core 13 is baked at a temperature ranging from 85° C. to 95° C.

[0072] In this specific example, the core 13 is baked at a temperature range of 85°C to 95°C, and the core 13 does not need to go through the process of hot pressing the diaphragm, thereby increasing the subsequent electrolyte wetting speed and improving the injection efficiency. For example, the core 13 is baked in a contact oven for 3 to 6 hours.

[0073] According to yet another embodiment of the present application, an electronic device is provided, and the electronic device includes the battery 1 as described above.

[0074] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0075] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery, characterized in that: The battery comprises: A housing (11), wherein the housing (11) has an opening (110); A cover assembly (12), the cover assembly (12) being arranged to cover the opening (110), and the cover assembly (12) and the shell (11) are enclosed to form a containing space; the cover assembly (12) is provided with a liquid injection hole (120) at a central position thereof; A winding core (13), the winding core (13) being arranged in the accommodating space, the winding core (13) having a central hole (130); the liquid injection hole (120) being in communication with the central hole (130); A sealing member (14), wherein the sealing member (14) blocks the liquid injection hole (120) and forms a sealed connection with the cover assembly (12).

2. The battery according to claim 1, characterized in that The cover body assembly (12) comprises a cover plate (121), a conductive member (122) and an insulating ring (123); a positioning hole is opened in the middle of the cover plate (121); a portion of the conductive member (122) is inserted into the positioning hole; the cover plate (121) and the conductive member (122) are spaced apart from each other; and the insulating ring (123) is arranged between the cover plate (121) and the conductive member (122); The conductive member (122) is arranged to protrude from the cover plate (121), and the liquid injection hole (120) is opened at the center of the conductive member (122).

3. The battery according to claim 2, characterized in that The cover plate (121), the conductive member (122) and the insulating ring (123) are connected by means of hot pressing and compounding.

4. The battery according to claim 2, characterized in that The edge of the cover plate (121) is connected to the housing (11) by welding; and the sealing component (14) is connected to the conductive component (122) by welding.

5. The battery according to claim 4, characterized in that The conductive member (122) is provided with a positioning groove (1220) around the liquid injection hole (120); the sealing member (14) comprises a sealing plug (141) and a positioning platform (142); the sealing plug (141) is inserted into the liquid injection hole (120); and the positioning platform (142) is welded to the conductive member (122) at the positioning groove (1220).

6. The battery according to claim 5, characterized in that The positioning groove (1220) is arranged higher than the opening (110).

7. The battery according to claim 2, characterized in that The battery comprises a first pole lug (15), the first pole lug (15) is spaced apart from the central hole (130), and the first pole lug (15) is electrically connected to the conductive member (122).

8. The battery according to claim 7, characterized in that The battery comprises a second pole lug (16), wherein the second pole lug (16) is electrically connected to the housing (11).

9. A method for preparing a battery as claimed in any one of claims 1 to 8, characterized in that: The preparation method comprises: Providing a housing (11), wherein the housing (11) has an opening (110); placing the winding core (13) into the housing (11) via the opening (110); The cover assembly (12) is covered on the opening (110), and the cover assembly (12) and the shell (11) are connected by welding; Injecting electrolyte into the central hole (130) of the winding core (13) through the injection hole (120) of the cover assembly (12); The sealing member (14) is used to seal the liquid injection hole (120), and the sealing member (14) is connected to the cover assembly (12) by welding.

10. The preparation method according to claim 9, characterized in that: Before injecting the electrolyte into the central hole (130) of the winding core (13) through the injection hole (120) of the cover assembly (12), the preparation method further comprises: The winding core (13) is baked at a temperature ranging from 85°C to 95°C.

11. An electronic device, characterized in that: The electronic device comprises a battery (1) according to any one of claims 1 to 8.

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