Protection structure and battery
By designing permeation pores with gradually increasing pore size and connecting pores of the protective film on the base plate, the risk of short circuit between the core and the casing and the problem of electrolyte wetting are solved, realizing uniform electrolyte wetting and automated battery assembly, and improving the safety and performance of the battery.
Patent Information
- Application Number
- CN202422930193.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-28
AI Technical Summary
In existing technologies, the chip pack and the casing are prone to short circuits due to debris falling out, and the wetting of the core by the electrolyte and the automation of battery assembly cannot be guaranteed.
A protective structure is designed with permeation holes on the bottom support plate. The diameter of the hole at the end closer to the core is smaller than that at the end farther from the core, forming a gradually increasing structure that blocks slag and allows electrolyte to pass through. Combined with the connecting holes of the protective membrane, this ensures uniform electrolyte wetting and pressure release.
It effectively blocks slag from conducting, reduces the risk of short circuits, improves electrolyte wetting efficiency, and ensures automated battery assembly and stable battery performance.
Smart Images
Figure CN223651496U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a battery technical field, concretely relates to a protection structure and battery. BACKGROUND
[0002] The core package bottom support piece plays an important role in the structure of the core package. The bottom support piece provides a firm support surface for the core package, protecting it from mechanical damage during manufacturing, transportation, and use. During battery assembly, the bottom support piece helps to fix the position of the core package, ensuring that it is neatly arranged within the battery package, which facilitates the automation of battery assembly. Most importantly, the bottom support piece can also serve as an insulator, preventing short circuits between the core package and other battery components or the battery package shell.
[0003] In related technology, the core package bottom support piece is usually designed as a comb or has penetration holes on the bottom support piece to ensure pressure release during use and to ensure the infiltration of electrolyte into the roll core. However, this design has a serious drawback: during battery use, it is difficult to avoid the occurrence of dropped residues inside the roll core. The dropped residues pass through the penetration holes in the core package inner protective film and the bottom support piece, causing the risk of a path being formed between the core package and the shell through the dropped residues, thereby causing corrosion and leakage of the core package shell. If the penetration holes on the core package protective film and the penetration holes on the bottom support piece are designed in a staggered structure, although this design can prevent short circuits between the dropped residues on the core package and the shell, it cannot guarantee pressure release during use and the infiltration of electrolyte into the roll core. At the same time, since the bottom support piece and the core package inner protective film are staggered, it is also not conducive to the automation of battery assembly. SUMMARY
[0004] Embodiments of the utility model provide a protection structure and battery, aim at solving the technical problem that the residue is easy to produce in the related art, and the residue can conduct the core package and the shell.
[0005] In one embodiment, the penetration hole includes a first penetration hole and a second penetration hole that are in communication with each other, the second penetration hole is located at an end of the first penetration hole away from the core package, and the aperture of the first penetration hole is smaller than the aperture of the second penetration hole.
[0006] In one embodiment, the penetration hole includes a first penetration hole and a second penetration hole that are in communication with each other, the second penetration hole is located at an end of the first penetration hole away from the core package, and the aperture of the first penetration hole is smaller than the aperture of the second penetration hole.
[0007] In one embodiment, the aperture of the first penetration hole is d1, and 0 < d1 < 10 mm; and / or,
[0008] The diameter of the second permeation hole is d2, where 0 < d2 ≤ 10 mm.
[0009] In one embodiment, 0mm < d2 - d1 < 5mm.
[0010] In one embodiment, the cross-sectional shape of the first permeation hole includes any one of a circle, triangle, square, rectangle, and trapezoid; and / or,
[0011] The cross-sectional shape of the second permeation hole can be any one of the following: circular, triangular, square, rectangular, or trapezoidal.
[0012] In one embodiment, the diameter of the permeation hole is gradually increased in the direction from the end of the permeation hole near the core package to the end of the permeation hole away from the core package.
[0013] In one embodiment, a plurality of permeation holes are formed on the base plate, and at least two rows of the plurality of permeation holes are spaced apart along the length direction of the base plate; wherein each row of holes includes a plurality of permeation holes, and the distance between two adjacent rows of holes is the same.
[0014] In one embodiment, the base plate is further provided with at least one fixing hole configured for a connector to pass through in order to fix the base plate to the core package, and the fixing hole is also configured for the electrolyte to pass through.
[0015] In one embodiment, a protective film is also included, which surrounds the base plate and forms a receiving cavity with the base plate, the receiving cavity being configured to receive the core package.
[0016] In one embodiment, the protective film has a plurality of interconnecting holes configured to allow the electrolyte to pass through.
[0017] Secondly, embodiments of this utility model provide a battery including a protective structure. The protective structure includes a base plate, one side of which is configured for mounting a core pack. A permeation hole is formed in the base plate, which is configured to allow electrolyte to pass through. The diameter of the permeation hole at the end near the core pack is smaller than the diameter at the end away from the core pack.
[0018] The beneficial effects of the embodiments of this utility model are as follows:
[0019] In this utility model's technical solution, the protective structure includes a base plate. One side of the base plate is configured for mounting the core pack. A permeation hole is formed within the base plate, allowing electrolyte to pass through. The diameter of the permeation hole at the end near the core pack is smaller than the diameter at the end away from the core pack. The permeation hole on the base plate allows electrolyte to pass through, enabling the core pack to be immersed in the electrolyte, improving the core pack's liquid absorption and injection efficiency. The smaller diameter at the end of the permeation hole near the core pack prevents residue from passing through, avoiding conduction between the core pack and the shell, and reducing the risk of short circuits caused by debris falling from the core pack and the shell. Simultaneously, the smaller diameter at the end of the permeation hole near the core pack facilitates the release of core pack pressure in case of abnormalities, preventing impact on the shell and avoiding core pack misalignment. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a three-dimensional schematic diagram of the protective structure provided in an embodiment of this utility model;
[0022] Figure 2 yes Figure 1 A schematic diagram of the structure of one embodiment of the permeable pores;
[0023] Figure 3 yes Figure 1 A schematic diagram of another embodiment of the permeable pore;
[0024] Figure 4 This is a three-dimensional schematic diagram of the protective structure provided in another embodiment of this utility model;
[0025] Figure 5 yes Figure 4 Schematic diagram of the structure of the first permeation pore;
[0026] Figure 6 yes Figure 4 A schematic diagram of the structure of the second permeation pore.
[0027] Explanation of icon numbers
[0028] Reference Name Reference Name 100 Protective structure 131 Second permeation hole 1 Bottom support sheet 14 Hole row 11 Permeation hole 15 Fixing hole 12 First bottom support portion 2 Protective film 121 First permeation hole 21 Communication hole 13 Second bottom support portion Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.
[0030] In related technologies, the core pack base plate is usually designed in a comb shape or has permeation holes 11 on it to ensure pressure release and electrolyte wetting of the core during use. However, this design has a serious drawback: during battery use, it is difficult to avoid debris falling from inside the core. This debris can penetrate the inner protective film of the core pack and the permeation holes 11 on the base plate, creating a pathway between the core pack and the casing, which can lead to corrosion and leakage of the core pack casing. If the permeation holes 11 on the core pack protective film and the permeation holes 11 on the base plate are designed to be staggered, although this can prevent short circuits between debris and the casing, this design cannot guarantee pressure release and electrolyte wetting of the core during use. Furthermore, the staggered arrangement of the base plate and the inner protective film of the core pack also hinders the automation of battery assembly.
[0031] In view of this, the present invention proposes a protective structure 100. Figures 1 to 6 This is a schematic diagram of one embodiment of the protective structure 100 provided by the present invention. The protective structure 100 provided by the present invention can block the residue generated by the core package, prevent the residue from conducting between the core package and the shell, and reduce the risk of short circuit between the slag falling on the core package and the shell. The protective structure 100 will be described in detail below with reference to the main drawings.
[0032] Please see Figure 1 The present invention provides a protective structure 100, which includes a base plate 1. One side of the base plate 1 is configured for mounting a core package. A permeation hole 11 is formed in the base plate 1. The permeation hole 11 is configured to allow the electrolyte to pass through. The diameter of the permeation hole 11 at the end near the core package is smaller than the diameter of the permeation hole 11 at the end away from the core package.
[0033] In this utility model's technical solution, the protective structure 100 includes a base plate 1. One side of the base plate 1 is configured for mounting the core pack. A permeation hole 11 is formed inside the base plate 1, which is configured to allow electrolyte to pass through. The diameter of the permeation hole 11 at the end near the core pack is smaller than the diameter at the end away from the core pack. The permeation hole 11 on the base plate 1 allows electrolyte to pass through, enabling the core pack to be immersed in the electrolyte, improving the core pack's liquid absorption and injection efficiency. The smaller diameter of the permeation hole 11 at the end near the core pack prevents residue generated by the core pack from passing through, avoiding the residue from conducting between the core pack and the shell, and reducing the risk of short circuits caused by debris falling from the core pack and the shell. At the same time, the smaller diameter of the permeation hole 11 at the end near the core pack facilitates the release of core pack pressure in case of abnormalities, avoiding impact on the shell and preventing core pack misalignment.
[0034] In some embodiments, please refer to Figure 3 and Figure 4 The base plate 1 includes a first base portion 12 and a second base portion 13. The first base portion 12 is disposed close to the core package, and the second base portion 13 is disposed on the side of the first base portion 12 away from the core package. A first permeation hole 121 is formed in the first base portion 12, and a second permeation hole 131 is formed in the second base portion 13. The first permeation hole 121 and the second permeation hole 131 communicate to form the permeation hole 11. The pore diameter of the first permeation hole 121 is smaller than the pore diameter of the second permeation hole 131. More specifically, the first permeation hole 121 and the second permeation hole 131 allow electrolyte to pass through, enabling the electrolyte inside the shell to act on the core package, achieving a liquid retention effect, effectively improving the liquid absorption and injection efficiency of the core package, extending the core package life, and improving the core package performance. In addition, the diameter of the first permeation hole 121 is smaller than that of the second permeation hole 131. The smaller diameter of the first permeation hole 121 can block the debris generated by the core pack, preventing the debris from passing through the first permeation hole 121 and the second permeation hole 131, thereby preventing the core pack from communicating with the shell due to debris.
[0035] In some embodiments, the first base portion 12 and the second base portion 13 are integrally formed.
[0036] In some embodiments, the pore size of the first permeation hole 121 is d1, where 0 < d1 < 10 mm. It should be noted that the pore size of the first permeation hole 121 is related to the number of first permeation holes 121. When the number of first permeation holes 121 is large, the pore size can be smaller. When the number of first permeation holes 121 is small, the pore size can be larger. For example, d1 can be 0.1 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 8.1 mm, 8.2 mm, 8.3 mm, 8.5 mm, 8.6 mm, 8.9 mm, 9 mm, 9.5 mm, or other unlisted values.
[0037] In some embodiments, the pore size of the second permeation hole 131 is d2, where 0 < d2 ≤ 10 mm. It should be noted that the pore size of the second permeation hole 131 is related to the number of second permeation holes 131. When the number of second permeation holes 131 is large, the pore size can be smaller. When the number of second permeation holes 131 is small, the pore size can be larger. For example, d2 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.8 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.7 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, or other unlisted values.
[0038] Furthermore, d1 and d2 also need to satisfy the following relationship: 0mm < d2 - d1 < 5mm. For example, in some embodiments, when the value of d2 is 5mm, the value of d1 can be 4.5mm, 4.1mm, 4.2mm, 3mm, 3.5mm, 2mm, 2.5mm, etc.
[0039] It should be noted that the shape of the first permeation hole 121 is not limited and can be selected according to the actual situation. The cross-sectional shape of the first permeation hole 121 can be any one of the following: circle, triangle, square, rectangle, and trapezoid.
[0040] Similarly, the shape of the second permeation hole 131 is not limited and can be selected according to the actual situation. The cross-sectional shape of the second permeation hole 131 can be any one of the following: circle, triangle, square, rectangle, and trapezoid.
[0041] In some embodiments, please refer to Figure 2 When the cross-sectional shape of the first permeation hole 121 is circular, and the cross-sectional shape of the second permeation hole 131 is also circular, the diameter of the circle of the cross-section of the second permeation hole 131 needs to be larger than the circle of the cross-section of the first permeation hole 121.
[0042] In some other embodiments, the cross-sectional shape of the first permeation hole 121 is circular, and the cross-sectional shape of the second permeation hole 131 can be triangular.
[0043] In some other embodiments, please refer to Figure 3 The permeation hole 11 is a straight through hole. Furthermore, the diameter of the permeation hole 11 gradually increases in the direction from the end of the permeation hole 11 near the core package to the end of the permeation hole 11 away from the core package. This arrangement allows the permeation hole 11 to block the debris generated by the core package, preventing the debris from passing through the first permeation hole 121 and the second permeation hole 131, thereby preventing the core package from communicating with the shell due to debris.
[0044] Please see Figure 1 In some embodiments, the permeation holes 11 are arranged in multiple rows. Specifically, multiple permeation holes 11 are formed on the base plate 1, and at least two rows 14 of holes are spaced apart along the length of the base plate 1. Each row 14 includes multiple permeation holes 11, and the distance between two adjacent rows 14 is the same. Each row has multiple permeation holes 11, thereby allowing the base plate 1 to uniformly absorb the electrolyte, ensuring that the core pack can uniformly absorb the electrolyte and improving the core pack performance. Specifically, depending on the size of the protective structure 100, the permeation holes 11 can be arranged in a matrix, i.e., multiple sets of rows 14 are provided. Specifically, there are 1-10 sets of rows 14, each row including at least two permeation holes 11; more specifically, there are 2-4 sets of rows 14, with 6-12 permeation holes per row. Of course, the permeation holes 11 can also be arranged in a staggered pattern or in other arrangements, which are not further limited here.
[0045] In some embodiments, please refer to Figure 3 and Figure 4The base plate 1 also has at least one fixing hole 15, which is configured to allow a connector to pass through to fix the base plate 1 to the core package. The fixing hole 15 is also configured to allow electrolyte to pass through. It should be noted that the position of the fixing hole 15 is not limited, as long as it can achieve fixation. In one embodiment, there are two fixing holes 15, which are located at both ends of the base plate 1, respectively, to fix both ends of the base plate 1 and improve the stability of the connection.
[0046] Please see Figure 4 The protective structure 100 also includes a protective film 2, which surrounds the base plate 1 and forms a receiving cavity with the base plate 1. The receiving cavity is configured to receive the core package. The protective film 2 includes an insulating layer and a liquid-retaining layer. The outer side of the insulating layer is configured to adhere to the shell, and the inner side of the insulating layer is adhered to the liquid-retaining layer, which covers the core package. In this embodiment, under the action of the protective film 2, the core package has a better liquid absorption effect and liquid injection efficiency, effectively extending the core package life and improving the core package performance. More specifically, the liquid-retaining layer can absorb the electrolyte in the shell and act on the core package to achieve a liquid retention effect, effectively improving the liquid absorption effect and liquid injection efficiency of the core package, extending the core package life, and improving the core package performance. In addition, during the process of placing the core package in the shell after being covered with the protective film 2, the presence of the protective film 2 can effectively prevent the core package from being scratched; and the insulating layer isolates the shell from the core package, achieving an insulating protection effect.
[0047] Please see Figure 4 In this embodiment, a plurality of connecting holes 21 are formed on the protective membrane 2, and the plurality of connecting holes 21 are configured to allow electrolyte to pass through. Specifically, the aperture of the connecting hole 21 is d3, where d3 is greater than d1. The function of the connecting hole 21 is to allow electrolyte to pass through quickly. Due to gravity, the debris generated by the core pack will only move downwards. The protective membrane 2 is mainly located on the periphery of the bottom support plate 1, so the debris will rarely pass through the connecting hole 21. The aperture of the connecting hole 21 can be set to be larger, thereby improving the liquid absorption effect and liquid injection efficiency of the core pack.
[0048] In some embodiments, the thickness of the base plate 1 is d0, where 0.1mm ≤ d0 ≤ 3mm. It should be noted that when d0 is less than 0.1mm, the thickness of the base plate 1 is too small, and during use, it cannot provide adequate insulation. Debris from the core package can easily penetrate the base plate 1, causing communication between the core package and the shell. When d0 is greater than 3mm, the thickness of the base plate 1 is too large, increasing its space requirement. Furthermore, the increased thickness of the base plate 1 reduces the electrolyte penetration effect. Specifically, d0 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2mm, 2.1mm, 2.3mm, 2.4mm, 2.7mm, 2.9mm, 3mm, or other unlisted values.
[0049] In some embodiments, the base sheet 1 includes a sponge, and the protective film 2 includes a Mylar film.
[0050] This utility model also proposes a battery, which includes the aforementioned protective structure 100. The specific structure of the protective structure 100 is described in the above embodiments. Since this battery adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.
[0051] Furthermore, the battery also includes a casing and a core pack. An installation cavity is formed inside the casing, and the core pack is provided with a protective structure 100. The protective structure 100 is located inside the casing and is used to isolate the core pack and the casing.
[0052] This utility model also proposes a battery module, which includes the battery described above. The specific structure of the battery is described in the above embodiments. Since this battery module adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.
[0053] This utility model also proposes a battery pack, which includes the aforementioned battery module. The specific structure of the battery module is described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.
[0054] Furthermore, this utility model also proposes an electrical device, which includes the aforementioned battery pack. The specific structure of the battery pack is described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.
[0055] It is understood that electrical equipment includes, but is not limited to, electric toys, power tools, electric vehicles, automobiles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Automobiles can include gasoline-powered cars, natural gas-powered cars, and new energy vehicles.
[0056] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A protective structure (100), characterized in that, Includes a base plate (1), one side of which is configured for core pack installation, and a permeation hole (11) is formed in the base plate (1), the permeation hole (11) being configured to allow electrolyte to pass through, the diameter of the permeation hole (11) at the end near the core pack being smaller than the diameter of the permeation hole (11) at the end away from the core pack.
2. The protective structure (100) according to claim 1, characterized in that, The permeation hole (11) includes a first permeation hole (121) and a second permeation hole (131) that are interconnected. The second permeation hole (131) is located at the end of the first permeation hole (121) away from the core package. The pore size of the first permeation hole (121) is smaller than the pore size of the second permeation hole (131).
3. The protective structure (100) according to claim 2, characterized in that, The diameter of the first permeation hole (121) is d1, 0 < d1 < 10 mm; and / or, The diameter of the second permeation hole (131) is d2, where 0 < d2 ≤ 10 mm.
4. The protective structure (100) according to claim 2, characterized in that, 0mm < d2 - d1 < 5mm.
5. The protective structure (100) according to claim 2, characterized in that, The cross-sectional shape of the first permeation hole (121) includes any one of the following: circular, triangular, square, rectangular, and trapezoidal; and / or, The cross-sectional shape of the second permeation hole (131) includes any one of the following: circle, triangle, square, rectangle, and trapezoid.
6. The protective structure (100) according to claim 1, characterized in that, The diameter of the permeation hole (11) gradually increases in the direction from the end of the permeation hole (11) near the core package to the end of the permeation hole (11) away from the core package.
7. The protective structure (100) according to any one of claims 1-6, characterized in that, The base plate (1) has a plurality of permeation holes (11) formed thereon, and at least two rows of holes (14) are arranged at intervals along the length of the base plate (1); wherein each row of holes (14) includes a plurality of permeation holes (11), and the distance between two adjacent rows of holes (14) is the same.
8. The protective structure (100) according to any one of claims 1-6, characterized in that, The base plate (1) is also provided with at least one fixing hole (15), which is configured to allow a connector to pass through in order to fix the base plate (1) to the core package, and the fixing hole (15) is also configured to allow the electrolyte to pass through.
9. The protective structure (100) according to any one of claims 1-6, characterized in that, It also includes a protective film (2) that surrounds the base plate (1) and forms a receiving cavity with the base plate (1) that is configured to receive the core package.
10. The protective structure (100) according to claim 9, characterized in that, The protective film (2) has a plurality of connecting holes (21) formed thereon, and the plurality of connecting holes (21) are configured to allow the electrolyte to pass through.
11. A battery, characterized in that, Includes the protective structure (100) as described in any one of claims 1-10.