A novel pouch battery with a packaging assembly

Abstract

The utility model discloses a novel soft package battery with packaging assembly, which comprises an electric core body, an air bag and a sealing head device, the air bag is located below the electric core body, a positioning part is arranged on the air bag, the positioning part is located at the edge of the electric core body, the positioning part comprises a first positioning part and a second positioning part, the distance from the left side edge of the first positioning part to the right side edge of the second positioning part is equal to the length of the electric core body; the sealing head device comprises a first sealing head device and a second sealing head device located at the two end faces of the air bag, the first sealing head device is provided with a first packaging face and a second packaging face, the second sealing head device is provided with a third packaging face and a fourth packaging face; the first sealing head device and the second sealing head device can move relatively, so that the first packaging face, the first positioning part and the third packaging face are sequentially attached; at the same time, the second packaging face, the second positioning part and the fourth packaging face are sequentially attached.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, and specifically relates to a novel soft-pack battery with a packaging component. Background Technology

[0002] With the rapid development of the new energy vehicle market, the demand for high-energy-density, high-performance batteries is increasing. Pouch lithium batteries are favored due to their advantages in safety and weight. However, in actual production, especially in current mass production processes, whether manual or automated, bending and twisting inevitably occur during handling and positioning of the cells when they are encapsulated in aluminum-plastic film, due to the increased size or length of the individual cells. Once the cell is placed in the aluminum-plastic film and the top is sealed, its positive and negative electrodes are fixed; if the cell bends or twists at this point, there is a risk of tearing of the positive and negative electrodes and their connecting TAB (Terminal Attached Bond). The TAB is a metallic conductor (usually made of nickel, aluminum, etc.) that is directly fixed to the positive and negative electrodes of the cell by welding or other methods, serving to conduct current. In lithium batteries, especially pouch lithium batteries, the TAB is not only responsible for power transmission but also has a direct impact on the overall performance of the battery. The quality of the TAB connection is crucial in the design of pouch lithium batteries because it relates to the battery's internal resistance, power output capability, and long-term reliability.

[0003] Furthermore, the pre-packaging and final packaging steps after liquid filling typically require a vacuum environment, during which the battery cell may shift due to the vacuuming process. Because the packaging head is close to the battery cell body, unnecessary pressure can be applied to the cell during packaging, potentially causing damage or rendering it unusable. This can also lead to increased internal resistance, short circuits, and other performance degradation issues, while also posing potential safety hazards. These problems severely impact production efficiency and product quality, increasing manufacturing costs. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a new type of soft-pack battery with a packaging component. By targeting the position and size of different cells, the cells can be accurately positioned during the packaging process, thereby overcoming the problems of inaccurate packaging and unstable packaging quality in the prior art, and ultimately achieving the goal of improving product quality and reducing production costs.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: a novel soft-pack battery with encapsulation components, comprising: a cell body;

[0006] An air bag is located below the battery cell body. The air bag is equipped with a positioning part located at the edge of the battery cell body. The positioning part includes a first positioning part and a second positioning part. The distance from the left edge of the first positioning part to the right edge of the second positioning part is equal to the length of the battery cell body.

[0007] The sealing device includes a first sealing device and a second sealing device located at both ends of the air bag. The first sealing device has a first sealing surface and a second sealing surface, and the second sealing device has a third sealing surface and a fourth sealing surface.

[0008] The first and second sealing devices can move relative to each other so that the first encapsulation surface, the first positioning part, and the third encapsulation surface are sequentially attached; at the same time, the second encapsulation surface, the second positioning part, and the fourth encapsulation surface are sequentially attached.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a positioning part on the air bag, the sealing head device and the battery cell maintain the correct relative position during the packaging process, preventing poor packaging problems caused by movement or displacement; the distance from the left edge of the first positioning part to the right edge of the second positioning part is equal to the length of the battery cell body, and the positioning part is located on both sides of the battery cell body, that is, the position of the positioning part is precisely set according to different packaged battery cells; at the same time, when the two sealing head devices move relative to each other, the packaging surface on the two packaging heads fits with the positioning part, that is, the size of the sealing head device is determined according to the size of different packaged battery cells, that is, the two sealing head devices can match the shape of the battery cell, thereby providing a tight wrapping during the packaging process and preventing the battery cell from being displaced by external forces.

[0010] The above-mentioned novel soft-pack battery has a first sealing part and a first fixing part on the first sealing head device. The first sealing part protrudes from the end face of the first fixing part. The first encapsulation surface and the second encapsulation surface are located on the end face of the first sealing part. A through first heating tube is provided inside the first sealing part. The diameter of the first heating tube is R1.

[0011] 2R1≤distance between the first sealing part and the first fixing part≤3R1.

[0012] The width and length of the first packaging surface are greater than or equal to the width and length of the first positioning part, and the width and length of the second packaging surface are greater than or equal to the width and length of the second positioning part;

[0013] The second sealing head device has a second sealing part and a second fixing part. The second sealing part protrudes from the end face of the second fixing part. The third sealing surface and the fourth sealing surface are located on the end face of the second sealing part. A through second heating tube is provided inside the second sealing part. The diameter of the second heating tube is R2.

[0014] 2R2≤The distance between the second sealing part and the first fixing part≤3R2;

[0015] The width and length of the third packaging surface are greater than or equal to the width and length of the first positioning part, and the width and length of the fourth packaging surface are greater than or equal to the length and width of the second positioning part, respectively.

[0016] The aforementioned novel soft-pack battery has an arc-shaped chamfer on the edge of the first sealing portion.

[0017] The aforementioned novel soft-pack battery has an arc-shaped chamfer on the edge of the second sealing portion.

[0018] In the aforementioned novel soft-pack battery, both the end faces of the first fixing part and the second fixing part are provided with evenly distributed screw holes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the novel soft-pack battery structure according to an embodiment of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the novel soft-pack battery structure according to an embodiment of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the end cap device according to an embodiment of the present utility model;

[0022] Explanation of reference numerals in the attached drawings: 1000 Battery cell body, 2000 Air bag, 2100 Positioning part, 2110 First positioning part, 2120 Second positioning part, 3000 End cap device, 3100 First end cap device, 3110 First sealing part, 3120 First fixing part, 3111 First encapsulation surface, 3112 Second encapsulation surface, 3113 First heating tube, 3200 Second end cap device, 3210 Second sealing part, 3220 Second fixing part, 3211 Third encapsulation surface, 3212 Fourth encapsulation surface, 3213 Second heating tube, 4000 Screw hole. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below, with reference to Figures 1 to 3This utility model provides a novel soft-pack battery with a packaging assembly, including: a cell body 1000, an air bag 2000, and a sealing device 3000. The air bag 2000 is located below the cell body 1000, and a positioning part 2100 is provided on the air bag 2000. The positioning part 2100 is located at the edge of the cell body 1000, and the positioning part 2100 includes a first positioning part 2110 and a second positioning part 2120. The distance from the left edge of the first positioning part 2110 to the right edge of the second positioning part 2120 is equal to the length of the cell body 1000. The sealing device 3000 includes a first positioning part 2110 and a second positioning part 2120 located at the edge of the cell body 1000. The air bag 2000 has a first sealing device 3100 and a second sealing device 3200 on both ends. The first sealing device 3100 has a first sealing surface 3111 and a second sealing surface 3112, and the second sealing device 3200 has a third sealing surface 3211 and a fourth sealing surface 3212. The first sealing device 3100 and the second sealing device 3200 can move relative to each other so that the first sealing surface 3111, the first positioning part 2110 and the third sealing surface 3211 are sequentially attached; at the same time, the second sealing surface 3112, the second positioning part 2120 and the fourth sealing surface 3212 are sequentially attached. By setting a positioning part 2100 on the air bag 2000, the sealing head device 3000 and the battery cell maintain the correct relative position during the packaging process, preventing poor packaging problems caused by movement or displacement. The distance from the left edge of the first positioning part 2110 to the right edge of the second positioning part 2120 is equal to the length of the battery cell body 1000. The positioning part 2100 is located on both sides of the battery cell body 1000, that is, the position of the positioning part 2100 is precisely set according to different packaged battery cells. At the same time, it is designed that when the two sealing heads 3000 move relative to each other, the packaging surface on the two packaging heads fits with the positioning part 2100. That is, the size of the sealing head device 3000 is determined according to the size of different packaged battery cells. In other words, the two sealing heads 3000 can match the shape of the battery cell, thereby providing a tight wrapping during the packaging process and preventing the battery cell from being displaced by external forces.

[0024] Furthermore, referring to Figure 1 The first sealing device 3100 has a first sealing portion 3110 and a first fixing portion 3120. The first sealing portion 3110 protrudes from the end face of the first fixing portion 3120. The first encapsulation surface 3111 and the second encapsulation surface 3112 are located on the end face of the first sealing portion 3110. (Refer to...) Figure 2The first sealing portion 3110 contains a through-hole first heating tube 3113 with a diameter of R1. The first sealing portion 3110 protrudes from the end face of the first fixing portion 3120. This design ensures that both the first encapsulation surface 3111 and the second encapsulation surface 3112 are located on the end face of the first sealing portion 3110, increasing the encapsulation contact area and helping to improve the uniformity of the encapsulation pressure distribution. Especially in the process of soft-pack battery encapsulation, uniform pressure distribution is crucial to ensuring encapsulation quality. Uneven pressure distribution may lead to incomplete encapsulation in certain areas, resulting in leakage or other safety hazards. Furthermore, the through-hole first heating tube 3113 within the first sealing portion 3110 provides the necessary heat to complete the heat sealing process. Of course, this invention does not limit the specific value of the diameter of the first heating tube 3113; preferably, 2R1 ≤ the distance from the first sealing portion 3110 to the first fixing portion 3120 ≤ 3R1. The limitation of the distance between the first sealing portion 3110 and the first fixing portion 3120 optimizes the structural layout of the sealing portion, enabling the first heating tube 3113 to heat the sealing portion quickly and evenly, thereby achieving the desired encapsulation effect. If the diameter of the first heating tube 3113 is too small, it cannot provide sufficient heat; if the diameter is too large, the heat will be too concentrated, thus affecting the encapsulation effect. Furthermore, this application does not limit the specific structure of the encapsulation surface and the positioning portion. Preferably, referring to… Figure 1 The first encapsulation surface 3111, the second encapsulation surface 3112, the third encapsulation surface 3211, the fourth encapsulation surface 3212, the first positioning part 2110, and the second positioning part 2120 are all rectangular. Further, the width and length of the first encapsulation surface 3111 are greater than or equal to the width and length of the first positioning part 2110, and the width and length of the second encapsulation surface 3112 are greater than or equal to the width and length of the second positioning part 2120. Of course, this invention does not limit the specific area of ​​the first encapsulation surface 3111, the second encapsulation surface 3112, the third encapsulation surface 3211, the fourth encapsulation surface 3212, the first positioning part 2110, and the second positioning part 2120. Preferably, the areas of the first encapsulation surface 3111, the second encapsulation surface 3112, the third encapsulation surface 3211, the fourth encapsulation surface 3212, the first positioning part 2110, and the second positioning part 2120 are equal. This design ensures a sufficiently large coverage area during encapsulation, thereby providing a more stable encapsulation effect and reducing the risk of leakage. Furthermore, the edge of the first sealing part 3110 is provided with an arc-shaped chamfer. The arc-shaped chamfer design helps to disperse stress and prevent stress concentration points from being generated during the sealing process, which could damage the air bag 2000 and the battery cell.

[0025] Furthermore, the second sealing device 3200 has a second sealing portion 3210 and a second fixing portion 3220. The second sealing portion 3210 protrudes from the end face of the second fixing portion 3220. The third sealing surface 3211 and the fourth sealing surface 3212 are located on the end face of the second sealing portion 3210. A through second heating tube 3213 is provided inside the second sealing portion 3210, and the diameter of the second heating tube 3213 is R2. Similar to the effect of the first sealing device 3100 described above, the design of the second sealing portion 3210 helps to improve the uniformity of the sealing pressure distribution. The through second heating tube 3213 inside the second sealing portion 3210 is used to provide the necessary heat to complete the heat sealing process. Of course, this utility model does not limit the specific value of the diameter of the second heating tube 3213. Preferably, 2R2 ≤ the distance between the second sealing portion 3210 and the second fixing portion 3220 ≤ 3R2. The optimized distance between the second sealing portion 3210 and the second fixing portion 3220 optimizes the structural layout of the sealing portion, enabling the second heating tube 3213 to heat the sealing portion quickly and evenly, thereby achieving the desired encapsulation effect. If the diameter of the second heating tube 3213 is too small, it cannot provide sufficient heat; if the diameter is too large, the heat will be too concentrated, affecting the encapsulation effect. Furthermore, the width and length of the third encapsulation surface 3211 are greater than or equal to the width and length of the first positioning portion 2110, and the width and length of the fourth encapsulation surface 3212 are greater than or equal to the length and width of the second positioning portion 2120, respectively. This design not only ensures a sufficiently large coverage area during encapsulation, providing a more stable encapsulation effect and reducing the risk of leakage, but also corresponds to the structure of the first sealing head device 3100, ensuring that the upper and lower end faces of the encapsulated surface experience the same force when the first sealing head device 3100 and the second sealing head device 3200 move relative to each other, resulting in a uniform force distribution and improving encapsulation quality. Furthermore, the edges of the second sealing portion 3210 are provided with rounded chamfers. The rounded chamfer design helps to disperse stress and prevent stress concentration points from being generated during the encapsulation process, which could damage the air bag 2000 and the battery cell.

[0026] Of course, this utility model does not limit the specific structure of the first fixing part 3120 and the second fixing part 3220. Preferably, referring to Figure 3 The first fixing part 3120 and the second fixing part 3220 are rectangular. The first fixing part 3120 and the first sealing part 3110 can be integrally formed, as can the second fixing part 3220 and the second sealing part 3210. Both the end faces of the first fixing part 3120 and the second fixing part 3220 are provided with evenly distributed screw holes 4000. This evenly distributed design ensures that the force is distributed more evenly among each screw hole 4000, avoiding structural deformation or damage caused by excessive force on a single point. This design is particularly suitable for encapsulation processes requiring high temperature and high pressure conditions, ensuring stable operation of the equipment even under harsh conditions.

[0027] It should be noted that in the description of this utility model, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships 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, be constructed or operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0028] In the description of this utility model, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is mentioned, it is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A novel soft-pack battery with encapsulation components, characterized in that, include: Battery cell body (1000); An air bag (2000) is located below the battery cell body (1000). The air bag (2000) is provided with a positioning part (2100). The positioning part (2100) is located at the edge of the battery cell body (1000). The positioning part (2100) includes a first positioning part (2110) and a second positioning part (2120). The distance from the left edge of the first positioning part (2110) to the right edge of the second positioning part (2120) is equal to the length of the battery cell body (1000). The sealing device (3000) includes a first sealing device (3100) and a second sealing device (3200) located at both ends of the air bag (2000). The first sealing device (3100) has a first sealing surface (3111) and a second sealing surface (3112), and the second sealing device (3200) has a third sealing surface (3211) and a fourth sealing surface (3212). The first sealing head device (3100) and the second sealing head device (3200) can move relative to each other so that the first encapsulation surface (3111), the first positioning part (2110) and the third encapsulation surface (3211) are sequentially attached; at the same time, the second encapsulation surface (3112), the second positioning part (2120) and the fourth encapsulation surface (3212) are sequentially attached. The first sealing device (3100) has a first sealing part (3110) and a first fixing part (3120). The first sealing part (3110) protrudes from the end face of the first fixing part (3120). The first encapsulation surface (3111) and the second encapsulation surface (3112) are located on the end face of the first sealing part (3110). A through first heating tube (3113) is provided inside the first sealing part (3110). The diameter of the first heating tube (3113) is R1. 2R1≤ Distance between the first sealing part (3110) and the first fixing part (3120)≤3R1; The width and length of the first encapsulation surface (3111) are greater than or equal to the width and length of the first positioning part (2110), and the width and length of the second encapsulation surface (3112) are greater than or equal to the width and length of the second positioning part (2120). The second sealing device (3200) has a second sealing part (3210) and a second fixing part (3220). The second sealing part (3210) protrudes from the end face of the second fixing part (3220). The third sealing surface (3211) and the fourth sealing surface (3212) are located on the end face of the second sealing part (3210). A through second heating tube (3213) is provided inside the second sealing part (3210). The diameter of the second heating tube (3213) is R2. 2R2≤The distance between the second sealing part (3210) and the first fixing part (3120) is ≤3R2; The width and length of the third encapsulation surface (3211) are greater than or equal to the width and length of the first positioning part (2110), and the width and length of the fourth encapsulation surface (3212) are greater than or equal to the length and width of the second positioning part (2120).

2. The novel soft-pack battery according to claim 1, characterized in that, The edge of the first sealing part (3110) is provided with an arc-shaped chamfer.

3. The novel soft-pack battery according to claim 1, characterized in that, The edge of the second sealing part (3210) is provided with an arc-shaped chamfer.

4. The novel soft-pack battery according to claim 1, characterized in that, Both the first fixing part (3120) and the second fixing part (3220) have evenly distributed screw holes (4000) on their end faces.

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