Battery sealing head

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a battery sealing head which comprises an upper sealing head and a lower sealing head which are oppositely arranged, the upper sealing head and the lower sealing head are both fixed on a base, and the lower sealing head comprises a lower hot pressing surface; bosses are arranged at the two ends of the lower hot-pressing surface; a lug groove is formed in the lower hot pressing surface; two raised lines are arranged on the front side surface of the lower sealing head; the two raised lines are respectively arranged on the left side and the right side of the tab groove. Compared with the prior art, through the arrangement of the two convex strips, the packaging area at the junction of the sealing edges can be increased, it is guaranteed that the sealing edges reserved after bevel angle cutting are wide enough, and the hidden danger of liquid leakage is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery manufacturing technical field especially relates to a battery head. BACKGROUND

[0002] As an advanced battery packaging form, soft-packaged batteries exhibit unique advantages in many fields. Compared with traditional cylindrical or square hard-shell batteries, soft-packaged batteries have significant characteristics such as light weight, flexible design, and high energy density. The outer shell of soft-packaged batteries is usually made of aluminum-plastic film, which not only has good barrier properties to effectively prevent electrolyte leakage and the intrusion of oxygen and moisture, but also has a certain degree of flexibility to adapt to different shapes and sizes of design requirements.

[0003] In the process of square battery packaging, there are generally several packaging positions such as top sealing, side sealing, corner sealing, one sealing, and two sealing. In the process of packaging irregular-shaped batteries, there are generally several packaging positions such as top sealing, side sealing, bottom sealing, irregular-shaped edge sealing, corner sealing, one sealing, and two sealing. Top sealing, side sealing, bottom sealing, irregular-shaped edge sealing, and corner sealing are performed after the battery cell is placed in the shell and before the electrolyte is injected. Drying in the environment before injection rarely causes leakage due to poor packaging. One sealing and two sealing are performed after the electrolyte is injected.

[0004] After the battery cell is packaged, the irregular-shaped edge / side sealing and the two sealing edges will form an interface with the top sealing edge. In order to facilitate the subsequent installation of the battery protection plate, the above-mentioned edge interface position needs to be cut at an angle. After cutting at an angle, there is a risk of insufficient residual sealing edge, which may cause leakage. In addition, the tab is suspended and is prone to bending damage during hot pressing. SUMMARY

[0005] In view of the problem of insufficient residual sealing edge after cutting the edge interface position at an angle, which may cause leakage, the utility model provides a battery head.

[0006] To solve the above problems, the utility model adopts the technical scheme that,

[0007] A battery head includes an upper head and a lower head arranged oppositely, both the upper head and the lower head are fixed on a base, the lower head includes a lower hot pressing surface, both ends of the lower hot pressing surface are provided with a boss, the lower hot pressing surface is provided with a tab slot, the front side of the lower head is provided with two convex strips, and the two convex strips are arranged on the left and right sides of the tab slot. Through the arrangement of the two convex strips, the packaging area at the edge interface position can be increased, ensuring that the remaining sealing edge after cutting at an angle is wide enough to eliminate the risk of leakage. In addition, the problem of false sealing at the edge interface position after injecting electrolyte, which may cause leakage, can be avoided, the packaging effect at the top sealing and two sealing interface position is improved, the packaging strength is improved, and the risk of leakage is avoided.

[0008] Preferably, the tab slot comprises a left tab slot and a right tab slot which are structurally identical; a protrusion is arranged on the left side of the left tab slot; another protrusion is arranged on the right side of the right tab slot; the protrusions extend from the lower hot-pressing surface to the top surface of the base.

[0009] Preferably, a transition round corner is arranged at the position where the protrusion is in contact with the front side of the lower head, so as to reduce the damage to the battery.

[0010] Preferably, the rear side of the lower head is provided with a first accommodation slot; the first accommodation slot is arranged downward from the lower hot-pressing surface; a support is arranged in the first accommodation slot; and the support is arranged on the rear side of the left tab slot and the right tab slot. The arrangement of the first accommodation slot provides a space for placing the aluminum-plastic film, facilitating hot-pressing. The arrangement of the support can provide support for the tab, avoiding damage.

[0011] Preferably, the top surface of the support is in the same plane as the top surface of the boss; and the width of the support is wider than the width of the left tab slot or the right tab slot. The support can provide support for the tab.

[0012] Preferably, the first glue-avoiding slot is arranged at both ends of the lower hot-pressing surface; the upper head comprises an upper hot-pressing surface; the second glue-avoiding slot is arranged at both ends of the upper hot-pressing surface; the boss is arranged outside the first glue-avoiding slot; and the second accommodation slot is arranged on the upper hot-pressing surface. The arrangement of the first glue-avoiding slot and the second glue-avoiding slot can avoid the pollution and damage of the molten polypropylene layer on the aluminum-plastic film extruded out during the hot-pressing packaging process to the battery head. The arrangement of the second accommodation slot can provide a space for placing the aluminum-plastic film, facilitating hot-pressing.

[0013] The advantages of the present application are as follows:

[0014] 1. The arrangement of the two protrusions can increase the packaging area at the edge junction position, ensure that the retained edge after the bevel angle cutting is wide enough, eliminate the risk of liquid leakage, avoid the problem that the edge junction position is prone to false sealing after electrolyte injection, improve the packaging effect at the top sealing and second sealing junction position, improve the packaging strength, and avoid the risk of liquid leakage.

[0015] 2. The arrangement of the support can provide support for the tab, avoiding damage. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating any creative labor.

[0017] Figure 1 It is a front view of the present application.

[0018] Figure 2 is a rear view schematic diagram of the utility model.

[0019] Figure 3 is a structure schematic diagram of the lower head of the utility model Figure 1 .

[0020] Figure 4 is a structure schematic diagram of the lower head of the utility model Figure 2 .

[0021] Figure 5 is a structure schematic diagram of the upper head of the utility model Figure 1 .

[0022] Figure 6 is a structure schematic diagram of the upper head of the utility model Figure 2 .

[0023] Main figure mark explanation

[0024] 1-upper head, 2-lower head, 3-base; 101-upper hot pressing surface, 102-second glue avoiding groove, 103-second accommodating groove; 201-lower hot pressing surface, 202-boss, 203-convex strip, 204-left lug ear groove, 205-right lug ear groove, 206-first accommodating groove, 207-boss, 208-first glue avoiding groove. Specific embodiment

[0025] In order to make the purpose, features, advantages of the utility model more obvious and easy to understand, the technical scheme in the utility model will be described clearly and completely below by combining the drawings in the specific embodiment of the utility model, obviously, the embodiment described below is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the patent, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of the patent protection.

[0026] As Figures 1-6 shown, a battery head, including oppositely arranged upper head 1 and lower head 2, upper head 1 and lower head 2 are all fixed on base 3, lower head 2 includes lower hot pressing surface 201;The both ends of lower hot pressing surface 201 are provided with first glue avoiding groove 208;The outer side of first glue avoiding groove 208 is provided with boss 202;Upper head 1 includes upper hot pressing surface 101;The both ends of upper hot pressing surface 101 are provided with second glue avoiding groove 102;The setting of first glue avoiding groove 208 and second glue avoiding groove 102 can avoid the pollution and damage of the melt of polypropylene layer on the aluminum plastic film extruded out in the hot pressing packaging process to the battery head.

[0027] The lower hot pressing surface 201 is provided with a boss 202 at both ends; the lower hot pressing surface 201 is provided with a tab slot; the tab slot comprises a left tab slot 204 and a right tab slot 205 which are the same in structure; the lower head 2 is provided with a first displacement slot 206 on the rear side; the first displacement slot 206 is provided by extending downward from the lower hot pressing surface 201; the upper hot pressing surface 101 is provided with a second displacement slot 103. The first displacement slot 206 and the second displacement slot 103 can provide a placement space for the aluminum plastic film, facilitating hot pressing. The two bosses 202 can leave a gap between the upper hot pressing surface 101 of the upper head 1 and the lower hot pressing surface 201 of the lower head 2, facilitating the packaging of the battery. The tab slot facilitates the hot pressing of the tab.

[0028] In the above arrangement, the lower head 2 is provided with two convex strips 203 on the front side; the two convex strips 203 are respectively arranged on the left and right sides of the tab slot. One convex strip 203 is arranged on the left side of the left tab slot 204; the other convex strip 203 is arranged on the right side of the right tab slot 205; the convex strip 203 extends from the lower hot pressing surface 201 to the top surface of the base 3. Through the arrangement of the two convex strips 203, the packaging area at the edge junction position can be increased, ensuring that the edge remaining after the bevel angle is cut is wide enough to eliminate the risk of liquid leakage; and the problem of false sealing at the edge junction position after injecting electrolyte can be avoided, improving the packaging effect at the top sealing and second sealing junction position, improving the packaging strength, and avoiding the risk of liquid leakage.

[0029] Among them, the convex strip 203 is provided with a transition round corner at the contact position with the front side of the lower head 2, reducing the damage to the battery. The first displacement slot 206 is provided with a platform 207; the platform 207 is arranged on the rear side of the left tab slot 204 and the right tab slot 205. The top surface of the platform 207 is in the same plane as the top surface of the boss 202; the width of the platform 207 is wider than the width of the left tab slot 204 or the right tab slot 205. The arrangement of the platform 207 can provide support for the tab to avoid damage.

[0030] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery head comprising an upper head (1) and a lower head (2) arranged opposite to each other, the upper head (1) and the lower head (2) being fixed on a base (3), characterized in that, The lower head (2) comprises a lower hot pressing surface (201); the lower hot pressing surface (201) is provided with a boss (202) at both ends; the lower hot pressing surface (201) is provided with a tab slot; the front side of the lower head (2) is provided with two convex strips (203); the two convex strips (203) are respectively arranged on the left and right sides of the tab slot.

2. The battery head of claim 1, wherein, The tab slot comprises a left tab slot (204) and a right tab slot (205) which are the same in structure; the left tab slot (204) is provided with one convex strip (203) on the left side; the right tab slot (205) is provided with another convex strip (203) on the right side; the convex strip (203) extends from the lower hot pressing surface (201) to the top surface of the base (3).

3. The battery head of claim 2, wherein, The convex strip (203) is provided with a transition round corner at the contact position with the front side of the lower head (2).

4. The battery head of claim 3, wherein, The rear side of the lower head (2) is provided with a first accommodation slot (206); the first accommodation slot (206) is arranged by extending downward from the lower hot pressing surface (201); the first accommodation slot (206) is provided with a table (207) inside; the table (207) is arranged on the rear side of the left tab slot (204) and the right tab slot (205).

5. The battery head of claim 4, wherein, The top surface of the table (207) is in the same plane as the top surface of the boss (202); the width of the table (207) is wider than the width of the left tab slot (204) or the right tab slot (205).

6. The battery head of claim 1 or 5, wherein, The lower hot pressing surface (201) is provided with a first glue avoiding groove (208) at both ends; the first glue avoiding groove (208) is provided with a boss (202) on the outside; the upper head (1) comprises an upper hot pressing surface (101); the upper hot pressing surface (101) is provided with a second glue avoiding groove (102) at both ends; the upper hot pressing surface (101) is provided with a second accommodation slot (103).

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