Insulating spacer structure for battery and battery

Abstract

The utility model discloses an insulating spacer structure for a battery and the battery, the insulating spacer structure for the battery comprises a spacer body, the spacer body is provided with a first liquid injection hole and a plurality of second liquid injection holes; the second liquid injection hole comprises a first part. The battery comprises any one of the insulating spacer structures for the battery. According to the insulation spacer structure for the battery, the first liquid injection hole and the second liquid injection holes are formed in the spacer body, so that electrolyte can pass through the first liquid injection hole and the second liquid injection holes; according to the present invention, the plurality of the second liquid injection holes are radially arranged along the circumferential direction of the first liquid injection hole, and the first parts of the second liquid injection holes extend from the center of the gasket body to the edge direction of the gasket body, such that the electrolyte can penetrate through the first liquid injection holes and the second liquid injection holes to infiltrate the large part of the battery roll core so as to achieve the high liquid injection efficiency; the battery comprises the insulating spacer structure for the battery, the liquid injection efficiency is relatively high, and the overall structural stability is relatively strong.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an insulating pad structure for batteries and a battery. Background Technology

[0002] The existing cylindrical battery T12 core structure corresponds to the insulating gasket structure. The insulating gasket has a pre-reserved negative electrode tab bottom welding hole in the middle. During the liquid injection process, the electrolyte can pass through this hole and wet the core upwards. However, since the insulating gasket only has a pre-reserved central hole, the liquid injection process hinders the upward wetting of the electrolyte.

[0003] Chinese invention patent CN101604737B discloses a secondary battery. Section

[0047] of the specification states that "the insulating pad 6 is circular and placed on the end face of the winding core 7. The structure of the insulating pad 6 is as follows..." Figure 2 As shown, it has openings 601, and the openings 601 are intermittent fan-shaped. (This is in conjunction with the attached...) Figure 2 It can be seen that the pores 601 extend along the circumferential direction of the insulating gasket 6, and multiple pores 601 are nested at intervals along the radial direction of the insulating gasket 6.

[0004] Since the core is a wound body with layers wound sequentially from the inside out, and the winding direction of the core is the same as the direction in which the holes 601 extend circumferentially along the insulating pad 6, and multiple holes 601 are spaced apart along the radial direction of the insulating pad 6, this design will result in: the wound layer of the core at the location where the holes 601 are provided in the radial direction of the insulating pad 6 can directly contact the electrolyte, while the wound layer at the location where the holes 601 are not provided in the radial direction of the insulating pad 6 cannot directly contact the electrolyte, thus resulting in uneven electrolyte injection in the radial direction of the core, affecting the electrolyte injection efficiency; furthermore, for the part of the core that can directly contact the electrolyte through the holes 601, the holes 601 are fan-shaped with a large width, resulting in a lack of support in this part; thus, the above technical solution affects the final performance of the battery and production efficiency. Utility Model Content

[0005] To overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide an insulating gasket structure for batteries. By providing a first liquid injection hole and multiple second liquid injection holes on the gasket body for electrolyte to pass through, and since the multiple second liquid injection holes are arranged radially along the circumferential direction of the first liquid injection hole, and the first part of the second liquid injection hole extends from the center of the gasket body to its edge, the electrolyte can be used to wet a large part of the battery core through the first liquid injection hole and the second liquid injection hole, thereby improving the liquid injection efficiency.

[0006] The second objective of this utility model is to provide a battery, including an insulating pad structure for the battery, which improves the upward wetting rate of the electrolyte at the bottom of the battery, resulting in higher electrolyte injection efficiency. Furthermore, the insulating pad structure for the battery supports the core, making the overall structure more stable, thereby ensuring the consistency and reliability of the battery.

[0007] One of the objectives of this utility model is achieved through the following technical solution:

[0008] A battery insulating pad structure, comprising:

[0009] The gasket body has a first injection hole and multiple second injection holes. The first injection hole is located at the center of the gasket body, and the multiple second injection holes are arranged radially along the circumferential direction of the first injection hole.

[0010] The second injection hole includes a first part, which extends along the center of the gasket body toward its edge.

[0011] In a preferred embodiment, the gasket body is circular, the first injection hole is located at the central axis of the gasket body, and a plurality of second injection holes are arranged radially along the circumferential direction of the gasket body, with the first portion of the second injection hole extending along the radial direction of the gasket body.

[0012] In a preferred embodiment, the second injection hole further includes a second portion, wherein the first portion of the second injection hole is in communication with the second portion of the second injection hole, and the second portion of the second injection hole extends along the circumferential direction of the gasket body.

[0013] In a preferred embodiment, the second injection hole further includes a third portion, wherein the first portion, the second portion, and the third portion of the second injection hole are interconnected, and the third portion of the second injection hole extends along the circumferential direction of the gasket body.

[0014] In a preferred embodiment, the second part and the third part of the second injection hole are respectively disposed on the left and right sides of the second injection hole, and the second part and the third part of the second injection hole are staggered relative to each other.

[0015] In a preferred embodiment, the first portion of the second injection hole is strip-shaped.

[0016] In a preferred embodiment, the inner side of the first portion of the second injection hole is in communication with the first injection hole;

[0017] Alternatively, the inner side of the first part of the second injection hole is isolated from the first injection hole.

[0018] In a preferred embodiment, when the inner side of the first portion of the second injection hole is isolated from the first injection hole, the outer side of the first portion of the second injection hole extends to the outer edge of the gasket body to form a groove.

[0019] The second objective of this utility model is achieved by the following technical solution:

[0020] A battery comprising the battery insulating pad structure of any one of the above;

[0021] The battery is a cylindrical battery;

[0022] The battery also includes a winding core, which is coaxially arranged with the battery's insulating pad structure.

[0023] In a preferred embodiment, the battery further includes tabs, the diameter of a first liquid injection hole being smaller than the outer diameter of the corresponding tab, and the diameter of a second liquid injection hole being smaller than the outer diameter of the corresponding tab.

[0024] In summary, this utility model has the following technical effects:

[0025] 1. The battery insulating pad structure of this utility model provides a first liquid injection hole and multiple second liquid injection holes on the pad body for electrolyte to pass through. Since the multiple second liquid injection holes are arranged radially along the circumferential direction of the first liquid injection hole, and the first part of the second liquid injection hole extends from the center of the pad body to its edge, the electrolyte can be wetted by the first liquid injection hole and the second liquid injection hole to a large part of the battery core, thereby improving the liquid injection efficiency.

[0026] 2. The battery of this utility model includes an insulating pad structure for the battery, which improves the upward wetting rate of the electrolyte at the bottom of the battery, resulting in higher electrolyte injection efficiency. Furthermore, the insulating pad structure for the battery supports the core, making the overall structure more stable, thereby ensuring the consistency and reliability of the battery. Attached Figure Description

[0027] Figure 1 This is a first-view structural schematic diagram of Embodiment 1 of the battery insulating pad structure of this utility model;

[0028] Figure 2 This is a second-view structural schematic diagram of Embodiment 1 of the battery insulating pad structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the usage state of Embodiment 1 of the battery insulating pad structure of this utility model;

[0030] Figure 4 This is a first-view structural schematic diagram of Embodiment 2 of the battery insulating pad structure of this utility model;

[0031] Figure 5 This is a second-view structural schematic diagram of Embodiment 2 of the battery insulating pad structure of this utility model;

[0032] Figure 6 This is a schematic diagram of the usage state of Embodiment 2 of the battery insulating pad structure of this utility model;

[0033] Figure 7 This is a schematic diagram of the battery structure in this utility model.

[0034] The meanings of the reference numerals in the attached figures are as follows:

[0035] 10. Gasket body; 20. First injection hole; 30. Second injection hole; 301. First part; 302. Second part; 303. Third part; 304. Groove; 40. Core; 50. First negative electrode tab; 60. Second negative electrode tab; 70. Outer shell. Detailed Implementation

[0036] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0037] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0038] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0039] Example 1

[0040] See Figures 1-3 This utility model discloses a battery insulating gasket structure, including: a gasket body 10, on which a first liquid injection hole 20 and a plurality of second liquid injection holes 30 are provided. The first liquid injection hole 20 is located at the center of the gasket body 10, and the plurality of second liquid injection holes 30 are arranged radially along the circumferential direction of the first liquid injection hole 20. The second liquid injection hole 30 includes a first part 301, and the first part 301 of the second liquid injection hole 30 extends along the center of the gasket body 10 toward its edge.

[0041] It should be noted that this utility model can be applied to lithium batteries; both the first injection hole 20 and the second injection hole 30 are through holes, and the first injection hole 20 and the second injection hole 30 are used to pass electrolyte. The size of the first injection hole 20 and the second injection hole 30 is based on the ability to pass electrolyte.

[0042] Since the first part 301 of the second injection hole 30 extends along the center of the gasket body 10 towards its edge, by controlling the length of the first part 301 of the second injection hole 30, it can cover as many winding layers of the core as possible from the radial direction of the core, so that as many winding layers of the core as possible can be directly injected with liquid, making the injection of liquid in the radial direction of the core more uniform, thereby improving the injection efficiency.

[0043] The battery insulating pad structure of this utility model provides a first liquid injection hole 20 and multiple second liquid injection holes 30 on the pad body 10 for electrolyte to pass through. Since the multiple second liquid injection holes 30 are arranged radially along the circumferential direction of the first liquid injection hole 20, and the first part 301 of the second liquid injection hole 30 extends from the center of the pad body 10 to its edge, the electrolyte can be used to wet a large part of the battery core 40 through the first liquid injection hole 20 and the second liquid injection holes 30, thereby improving the liquid injection efficiency.

[0044] In this embodiment of the utility model, the gasket body 10 is circular, the first injection hole 20 is located at the central axis of the gasket body 10, and a plurality of second injection holes 30 are arranged radially along the circumferential direction of the gasket body 10. The first part 301 of the second injection hole 30 extends along the radial direction of the gasket body 10.

[0045] Preferably, the plurality of second injection holes 30 are arranged radially and uniformly along the circumferential direction of the gasket body 10, thereby facilitating the uniform distribution and rapid penetration of the electrolyte during injection.

[0046] In this embodiment of the present invention, the first part 301 of the second injection hole 30 is strip-shaped.

[0047] Specifically, the inner side of the first part 301 of the second injection hole 30 is straight or arc-shaped, and the outer side of the first part 301 of the second injection hole 30 is straight or arc-shaped, depending on the actual application scenario, and is not restricted.

[0048] In this embodiment of the invention, the inner side of the first portion 301 of the second injection hole 30 is in communication with the first injection hole 20; or, see [reference needed]. Figures 1-2 The inner side of the first part 301 of the second injection hole 30 is isolated from the first injection hole 20.

[0049] It should be noted that the inner side of the first part 301 of the second injection hole 30 refers to the side of the second injection hole 30 that is close to the first injection hole 20 along the radial direction of the gasket body 10. Correspondingly, the outer side of the first part 301 of the second injection hole 30 refers to the side of the second injection hole 30 that is far away from the first injection hole 20 along the radial direction of the gasket body 10.

[0050] Furthermore, since the first portion 301 of the second injection hole 30 extends radially along the gasket body 10, the longer the first portion 301 of the second injection hole 30 is, the more of the winding layers of the battery core 40 can be covered from the radial direction of the battery core 40, and the higher the injection efficiency. In other words, the injection efficiency is higher when the inner side of the first portion 301 of the second injection hole 30 is connected to the first injection hole 20 than when the inner side of the first portion 301 of the second injection hole 30 is isolated from the first injection hole 20.

[0051] Furthermore, since the gasket body 10 is circular and a first injection hole 20 is provided at its central axis, and the distance between the inner sides of the first portions 301 of each second injection hole 30 is small, if the inner sides of the first portions 301 of some of the second injection holes 30 are interconnected with the first injection hole 20, it would increase the hollow area and reduce the structural strength at that location. To ensure the structural strength and stability of the gasket body 10, the inner sides of the first portions 301 of the second injection holes 30 are isolated from the first injection hole 20. In other words, the structural strength and stability when the inner sides of the first portions 301 of the second injection holes 30 are isolated from the first injection hole 20 are higher than the structural strength and stability when the inner sides of the first portions 301 of the second injection holes 30 are interconnected with the first injection hole 20.

[0052] In this embodiment of the utility model, the gasket body 10 is an insulating gasket body.

[0053] Specifically, the gasket body 10 can be made of existing polymer materials such as polyvinylidene fluoride (PVDF), polypropylene (PP), and polyethylene (PE). Of course, the gasket body 10 can also be made of other materials that can achieve insulation, and is not limited to these.

[0054] Example 2

[0055] See Figures 4-6 In this embodiment of the present invention, the second injection hole 30 further includes a second part 302. The first part 301 of the second injection hole 30 and the second part 302 of the second injection hole 30 are interconnected. The second part 302 of the second injection hole 30 extends along the circumferential direction of the gasket body 10.

[0056] In this embodiment of the present invention, the second injection hole 30 further includes a third part 303. The first part 301, the second part 302, and the third part 303 of the second injection hole 30 are interconnected. The third part 303 of the second injection hole 30 extends along the circumferential direction of the gasket body 10.

[0057] In this embodiment of the present invention, the second part 302 and the third part 303 of the second injection hole 30 are respectively disposed on the left and right sides of the second injection hole 30, and the second part 302 and the third part 303 of the second injection hole 30 are offset from each other.

[0058] It should be noted that the left and right sides of the second injection hole 30 mentioned above refer to the left and right sides of the second injection hole 30 along the circumferential direction of the gasket body 10. That is, the left and right sides of the second injection hole 30 are different from the inner side and the outer side of the second injection hole 30.

[0059] If the second part 302 of the second injection hole 30 and the third part 303 of the second injection hole 30 are flush with each other, only a small number of second injection holes 30 can be arranged on the gasket body 10 of the same area; since the second part 302 of the second injection hole 30 and the third part 303 of the second injection hole 30 are staggered, the spacing between adjacent second injection holes 30 can be made smaller, that is, more second injection holes 30 can be arranged on the gasket body 10 of the same area.

[0060] Furthermore, the second part 302 and the third part 303 of the second injection hole 30 are both arranged inside the second injection hole 30, and the overall shape of the second injection hole 30 is close to a "T" shape; or, the second part 302 and the third part 303 of the second injection hole 30 are arranged inside and outside the second injection hole 30, respectively, and the overall shape of the second injection hole 30 is a "Z" shape.

[0061] Preferably, the second part 302 and the third part 303 of the second injection hole 30 are the same in size and shape, and both the second part 302 and the third part 303 of the second injection hole 30 can be fan-shaped.

[0062] Based on the above structure, since the second injection hole 30 includes a first part 301, a second part 302 and a third part 303 that are interconnected, the second injection hole 30 extends both along the radial direction of the gasket body 10 and along the circumferential direction of the gasket body 10, thereby improving the injection efficiency while ensuring the structural strength and structural stability of the gasket body 10.

[0063] In this embodiment of the present invention, when the inner side of the first part 301 of the second injection hole 30 is isolated from the first injection hole 20, the outer side of the first part 301 of the second injection hole 30 extends to the outer edge of the gasket body 10 to form a groove 304; at this time, the electrolyte does not need to pass through the gap between the bottom of the gasket body 10 and the outer shell 70 to penetrate upward, and the electrolyte can directly penetrate upward through the groove 304, resulting in a better injection effect.

[0064] It should be noted that when the second injection hole 30 only includes the first part 301, a large number of second injection holes 30 can be evenly arranged on the gasket body 10. The included angle of the second injection holes 30 is α, and the value of α ranges from 5° to 20°, with α preferably being 10°. For example, 10 or 12 second injection holes 30 can be arranged on the gasket body 10. Of course, the number of second injection holes 30 and the arrangement interval are determined according to the actual number and are not limited.

[0065] When the second injection hole 30 includes a first part 301, a second part 302 and a third part 303, a small number of second injection holes 30 can be evenly arranged on the gasket body 10. The included angle of the second injection holes 30 is b, and the value of b is in the range of 50°-70°, preferably 60°. For example, 3 or 6 second injection holes 30 can be arranged on the gasket body 10. Of course, the number of second injection holes 30 and the arrangement interval are determined according to the actual number and are not limited.

[0066] Example 3

[0067] See Figure 7 The present invention also discloses a battery, including the battery insulating pad structure of any one of the above; the battery is a cylindrical battery; the battery also includes a core 40, which is coaxially arranged with the battery insulating pad structure.

[0068] Since the core 40 and the battery insulating pad structure are coaxially arranged, that is, the first injection hole 20 and the core 40 are coaxially arranged, the electrolyte can more evenly wet the core 40 through the first injection hole 20 and the second injection hole 30, thus achieving uniform liquid injection.

[0069] The battery of this utility model includes an insulating pad structure for the battery, which improves the rate at which the electrolyte at the bottom of the battery wets upward, resulting in higher electrolyte injection efficiency. Furthermore, the insulating pad structure for the battery supports the core 40, making the overall structure more stable, thereby ensuring the consistency and reliability of the battery.

[0070] In this embodiment of the invention, the battery further includes tabs, the diameter of the first liquid injection hole 20 is smaller than the outer diameter of the corresponding tab, and the diameter of the second liquid injection hole 30 is smaller than the outer diameter of the corresponding tab.

[0071] Specifically, see Figure 7 The electrode includes a first negative electrode 50 and a second negative electrode 60; a first injection hole 20 is provided corresponding to the first negative electrode 50, such that the diameter of the first injection hole 20 is smaller than the outer diameter of the first negative electrode 50, so as to prevent the first negative electrode 50 from falling into the first injection hole 20 and causing a short circuit; a slot 304 formed by the first part 301 of the second injection hole 30 is provided corresponding to the second negative electrode 60, such that the diameter of the slot 304 is smaller than the outer diameter of the second negative electrode 60, so as to prevent the second negative electrode 60 from falling into the slot 304 and causing a short circuit.

[0072] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A battery insulating pad structure, characterized in that: include: The gasket body has a first injection hole and a plurality of second injection holes. The first injection hole is located at the center of the gasket body, and the plurality of second injection holes are arranged radially along the circumferential direction of the first injection hole. The second injection hole includes a first portion, which extends along the center of the gasket body toward its edge.

2. The battery insulating pad structure according to claim 1, characterized in that: The gasket body is circular in shape. The first injection hole is located at the central axis of the gasket body. A plurality of second injection holes are arranged radially along the circumferential direction of the gasket body. The first part of the second injection hole extends along the radial direction of the gasket body.

3. The battery insulating pad structure according to claim 2, characterized in that: The second injection hole also includes a second part, wherein the first part of the second injection hole is in communication with the second part of the second injection hole, and the second part of the second injection hole extends along the circumferential direction of the gasket body.

4. The battery insulating pad structure according to claim 3, characterized in that: The second injection hole also includes a third part. The first part, the second part, and the third part of the second injection hole are interconnected. The third part of the second injection hole extends along the circumferential direction of the gasket body.

5. The battery insulating pad structure according to claim 4, characterized in that: The second part and the third part of the second injection hole are respectively disposed on the left and right sides of the second injection hole, and the second part and the third part of the second injection hole are staggered.

6. The battery insulating pad structure according to claim 4, characterized in that: The first part of the second injection hole is strip-shaped.

7. The battery insulating pad structure according to claim 1, characterized in that: The inner side of the first part of the second injection hole is in communication with the first injection hole; Alternatively, the inner side of the first portion of the second injection hole is isolated from the first injection hole.

8. The battery insulating pad structure according to claim 7, characterized in that: When the inner side of the first portion of the second injection hole is isolated from the first injection hole, the outer side of the first portion of the second injection hole extends to the outer edge of the gasket body to form a groove.

9. A battery, characterized in that: Includes the battery insulating pad structure as described in any one of claims 1-8; The battery is a cylindrical battery; The battery also includes a winding core, which is coaxially arranged with the battery insulating pad structure.

10. The battery according to claim 9, characterized in that: It also includes tabs, wherein the diameter of the first injection hole is smaller than the outer diameter of the corresponding tab, and the diameter of the second injection hole is smaller than the outer diameter of the corresponding tab.

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