Needle type steel shell battery structure for improving production efficiency

Abstract

This utility model discloses a needle-type steel-cased battery structure for improving production efficiency, comprising: a casing, a cover plate, a core, and a gasket; the cover plate is located at the end of the casing and has an electrode post; the core is located inside the casing and is recessed within the casing; the gasket is located at one end of the cover plate, and after the cover plate and casing are assembled, the gasket on the cover plate is located inside the casing and abuts against the core, and the side of the gasket facing the core has a concave structure to form a cavity inside the casing to temporarily store electrolyte. This utility model has the advantages of reducing the electrolyte injection time and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to needle-type steel-cased batteries, and more particularly to a needle-type steel-cased battery structure that improves production efficiency. Background Technology

[0002] Currently, needle-type steel-cased batteries are a subtype of steel-cased batteries. The outer shell is made of steel and has a needle-like shape, primarily used in small electronic devices with specific requirements for battery size and shape. During electrolyte filling in needle-type steel-cased batteries, the electrolyte permeates to the bottom of the cell under gravity. Due to the relatively high height of the cell, complete electrolyte permeation to the bottom takes a long time. Existing technologies extend the filling time to allow sufficient time for electrolyte to permeate, but this leads to reduced production efficiency. To improve production efficiency, a needle-type steel-cased battery structure is proposed. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] Therefore, this utility model proposes a needle-type steel-cased battery structure to improve production efficiency. This needle-type steel-cased battery structure has the advantages of reducing the liquid injection time and improving production efficiency.

[0005] The needle-type steel-cased battery structure for improving production efficiency according to an embodiment of the present invention includes: a casing, a cover plate, a core, and a gasket; the cover plate is disposed at the end of the casing, and an electrode post is provided on the cover plate; the core is located inside the casing, and the core is recessed inside the casing; the gasket is disposed at one end of the cover plate, and after the cover plate and the casing are assembled, the gasket on the cover plate is located inside the casing and abuts against the core, and the side of the gasket facing the core has a concave structure to form a cavity inside the casing to temporarily store electrolyte.

[0006] According to one embodiment of the present invention, one electrode of the winding core is connected to the pole post via a tab, and one end of the pole post is located within the concave structure of the washer.

[0007] According to one embodiment of the present invention, the concave structure of the washer includes a through hole, the through hole extending through both the upper and lower ends of the washer, and one end of the pole post is located inside the through hole.

[0008] According to one embodiment of the present invention, the concave structure of the gasket further includes a groove, one side of which is connected to a through hole, and the electrode tab is connected to the through hole through the groove.

[0009] According to one embodiment of the present invention, the width of the groove is greater than the width of the tab.

[0010] According to one embodiment of the present invention, the other side of the groove extends through the outer surface of the gasket.

[0011] According to one embodiment of the present invention, a reinforcing layer is formed at the connection between the electrode tab and the electrode post, and the reinforcing layer covers the electrode post.

[0012] According to one embodiment of the present invention, the washer is made of a high-temperature resistant and corrosion-resistant polymer.

[0013] According to one embodiment of the present invention, the reinforcing layer is made of a colloid with anti-corrosion properties.

[0014] According to one embodiment of the present invention, the lower surface of the reinforcing layer is recessed within the gasket.

[0015] The beneficial effect of this utility model is that it uses a space for temporary storage of electrolyte in the shell so that a sufficient amount of electrolyte can be injected into the shell and then the subsequent packaging can be carried out directly. There is no need to slow down the injection speed of electrolyte or wait for the electrolyte to completely soak the core, which improves production efficiency.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments with accompanying drawings, in which: Figure 1 This is a cross-sectional view of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model. For ease of display, the shell has been hidden. Figure 3 This is a schematic diagram of the gasket structure of this utility model; Figure label: 1. Shell; 2. Cover plate; 21. Pole post; 3. Core; 31. Pole lug; 32. Reinforcing layer; 4. Washer; 41. Through hole; 42. Groove. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following describes in detail, with reference to the accompanying drawings, the needle-type steel-cased battery structure for improving production efficiency according to an embodiment of the present invention.

[0023] like Figures 1-3 As shown, the needle-type steel-cased battery structure for improving production efficiency according to an embodiment of the present invention includes: a casing 1, a cover plate 2, a core 3, and a gasket 4; the cover plate 2 is located at the end of the casing 1, and an electrode post 21 is provided on the cover plate 2; the core 3 is located inside the casing 1, and the core 3 is recessed inside the casing 1; the gasket 4 is located at one end of the cover plate 2, and after the cover plate 2 and the casing 1 are assembled, the gasket 4 on the cover plate 2 is located inside the casing 1 and abuts against the core 3, and the side of the gasket 4 facing the core 3 has a concave structure to form a cavity inside the casing 1 to temporarily store electrolyte.

[0024] In this embodiment, the length of the core 3 is less than the length of the housing 1. Therefore, it is equivalent to pre-setting a space for temporary electrolyte storage inside the housing 1. After placing the core 3 in the housing 1, a sufficient amount of electrolyte is injected into the housing 1, and then subsequent packaging is carried out directly. In this process, there is no need to slow down the electrolyte injection speed, nor is it necessary to wait for the electrolyte to completely soak the core 3. During the packaging process and after packaging, the electrolyte has enough time to soak the core 3, which improves production efficiency. By setting a gasket 4 in the space, the gasket 4 holds and limits the core 3, reducing the risk of the core 3 shifting or protruding beyond its original height.

[0025] One electrode of the core 3 is connected to the pole post 21 via the tab 31, and one end of the pole post 21 is located in the concave structure of the washer 4.

[0026] In this embodiment, the core 3 includes a positive electrode and a negative electrode. The housing 1 and the terminal post 21 are respectively connected to the positive and negative electrodes of the core 3. The connection of the positive and negative electrodes can be selected according to the requirements. By setting the connection position of the tab 31 and the terminal post 21 within the concave structure of the gasket 4, the extra space occupied by the tab 31 and the terminal post 21 is avoided, thus improving the space utilization rate. In addition, the gasket 4 reduces the risk of the core 3 shifting or protruding beyond the original height of the core 3. Furthermore, due to the concave structure of the gasket 4, the tab 31 has a certain length to retain when bent, forming a C-shaped or S-shaped shape. That is to say, a certain length is reserved for the tab 31 to be stretched, so that the weld and bending points of the tab 31 are not easy to break when the battery is stretched. When the battery is squeezed, the gasket 4 can reduce the compression strength of the tab 31, reduce the deformation of the tab 31, and avoid bending and breakage. At the same time, it also avoids the tab 31 from contacting the housing 1 due to bending, thus avoiding short circuits.

[0027] The concave structure of the washer 4 includes a through hole 41, which extends through the upper and lower ends of the washer 4, and one end of the pole post 21 is located inside the through hole 41.

[0028] The concave structure of the washer 4 also includes a groove 42, one side of which is connected to the through hole 41, and the tab 31 is connected to the through hole 41 through the groove 42.

[0029] In this embodiment, the groove 42 is located on one side of the washer 4, allowing the tab 31 to be led out from the position of the core 3 away from the central axis. Since the diameter of the core 3 of the needle-type steel-cased battery is small, the winding curvature of the core 3 is greater closer to the central axis. By moving the connection between the tab 31 and the core 3 outward, the winding curvature of the tab 31 is reduced, thereby reducing the thickness requirement of the tab 31 and allowing the tab 31 to be selected with a relatively thicker size, which improves the connection strength when welding with the terminal post 21. During welding, the cover plate 2 is in an open state, that is, the cover plate 2 is parallel to the central axis of the housing 1. Then, the tab 31 is attached to the terminal post 21 in the through hole 41, and the two are fixedly connected by welding or other methods. After the connection is completed, the tab 31 is bent and the cover plate 2 is placed on the housing 1. At this time, the washer 4 is located inside the housing 1, the part of the tab 31 near the core 3 is located in the groove 42, and the part of the tab 31 away from the core 3 is located in the through hole 41.

[0030] Furthermore, the through hole 41 is coaxially or eccentrically arranged with the washer 4, and the pole post 21 is concentrically arranged with the through hole 41.

[0031] The width of the groove 42 is greater than the width of the tab 31, so as to provide the necessary space for the tab 31.

[0032] The other side of the groove 42 extends through the outer surface of the washer 4, that is, the other side of the groove 42 extends through the outer circumferential surface of the washer 4. With this arrangement, the electrolyte can cover at least a portion of each layer of the core 3, so that the electrolyte can penetrate each layer of the core 3.

[0033] A reinforcing layer 32 is formed at the connection between the tab 31 and the pole post 21, and the reinforcing layer 32 covers the pole post 21. The reinforcing layer 32 is made of a colloid with anti-corrosion properties.

[0034] In this embodiment, the reinforcing layer 32 can be a colloid such as a UV adhesive or a two-component adhesive that is resistant to electrolyte corrosion, so as to increase the connection between the tab 31 and the post 21. The reinforcing layer 32 can cover the area of ​​the post 21 that protrudes from the through hole 41.

[0035] Washer 4 is made of a high-temperature resistant and corrosion-resistant polymer. The material of washer 4 can be PC / PI / PET, etc.

[0036] Because the tab 31 is extremely thin, the connection strength after welding is relatively weak. The reinforcement layer 32 further strengthens the connection between the tab 31 and the post 21. Since the connection between the post 21 and the tab 31 is located inside the through hole 41 of the gasket 4, the concave structure of the gasket 4 plays a role in limiting the flow area of ​​the adhesive during the dispensing process of the reinforcement layer 32, so that the adhesive is cured in the required area, reducing the loss of adhesive and ensuring the strength of the connection.

[0037] The lower surface of the reinforcing layer 32 is recessed within the gasket 4. In other words, the reinforcing layer 32 does not protrude from the lower surface of the gasket 4, ensuring the pre-storage space for the electrolyte.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A needle-type steel-cased battery structure for improving production efficiency, characterized in that, include: Shell (1); Cover plate (2), the cover plate (2) is located at the end of the housing (1), and the cover plate (2) is provided with pole post (21). The core (3) is located inside the housing (1) and is recessed inside the housing (1); Washer (4) is provided at one end of cover plate (2). After cover plate (2) is assembled with housing (1), washer (4) on cover plate (2) is located inside housing (1) and abuts against core (3). The side of washer (4) facing core (3) has a concave structure to form a cavity in housing (1) to temporarily store electrolyte.

2. The needle-type steel-cased battery structure for improving production efficiency according to claim 1, characterized in that, One electrode of the core (3) is connected to the pole post (21) via the tab (31), and one end of the pole post (21) is located in the concave structure of the washer (4).

3. The needle-type steel-cased battery structure for improving production efficiency according to claim 2, characterized in that, The concave structure of the washer (4) includes a through hole (41), which extends through the upper and lower ends of the washer (4), and one end of the pole post (21) is located inside the through hole (41).

4. The needle-type steel-cased battery structure for improving production efficiency according to claim 3, characterized in that, The concave structure of the washer (4) also includes a groove (42), one side of which is connected to the through hole (41), and the tab (31) is connected to the through hole (41) through the groove (42).

5. The needle-type steel-cased battery structure for improving production efficiency according to claim 4, characterized in that, The width of the groove (42) is greater than the width of the tab (31).

6. The needle-type steel-cased battery structure for improving production efficiency according to claim 5, characterized in that, The other side of the groove (42) extends through the outer surface of the washer (4).

7. The needle-type steel-cased battery structure for improving production efficiency according to claim 6, characterized in that, A reinforcing layer (32) is formed at the connection between the tab (31) and the pole post (21), and the reinforcing layer (32) covers the pole post (21).

8. The needle-type steel-cased battery structure for improving production efficiency according to claim 1, characterized in that, The washer (4) is made of a high-temperature resistant and corrosion-resistant polymer.

9. The needle-type steel-cased battery structure for improving production efficiency according to claim 7, characterized in that, The reinforcing layer (32) is made of a colloid with anti-corrosion properties.

10. The needle-type steel-cased battery structure for improving production efficiency according to claim 7, characterized in that, The lower surface of the reinforcing layer (32) is recessed into the gasket (4).

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