A novel cylindrical battery casing with high leak resistance

Abstract

A novel, highly leak-resistant cylindrical battery casing includes a positive electrode cylinder, a negative electrode plate, a separator tube, and a negative electrode rod. The positive electrode cylinder is hollow inside, with one end serving as the positive terminal of the battery casing and the other end having an opening. The negative electrode plate serves as the negative terminal of the battery casing and fits over the opening of the positive electrode cylinder. The separator tube passes through the positive electrode cylinder and is also hollow inside with an opening at one end. One end of the negative electrode rod abuts against the inner side of the negative electrode plate, and the other end is inserted into the negative electrode material located in the first chamber. The casing also includes a thick-walled sealing ring sandwiched between the positive electrode cylinder and the negative electrode plate. A first sealing structure is provided between the thick-walled sealing ring and the opening of the separator tube, and a second sealing structure is provided between the thick-walled sealing ring and the negative electrode rod. This invention solves the problem of easy leakage of the negative electrode material in existing cylindrical alkaline batteries.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical batteries, specifically to a novel cylindrical battery casing with high leakage resistance. Background Technology

[0002] Cylindrical batteries are a type of battery with high capacity, long cycle life, and wide operating temperature range. Among the most common cylindrical batteries on the market are cylindrical alkaline batteries. Cylindrical alkaline batteries are widely used in people's lives and production in various industries due to their high storage capacity, heavy load capacity, and good consistency.

[0003] The structure of cylindrical alkaline batteries on the market is relatively uniform, consisting of a positive electrode cylinder and a negative electrode end plate. A separator tube is installed in the cylinder to divide the internal space into two parts to store the positive and negative electrode materials respectively. A negative electrode rod connects the negative electrode material to the end plate. Since the positive and negative electrode materials of alkaline batteries may be in liquid or powder form, a sealing ring is usually installed between the cylinder and the end plate to prevent material leakage and pollution and harm.

[0004] However, the existing cylindrical alkaline batteries have relatively simple and thin sealing rings, and the sealing rings do not have a tight sealing structure with the cylinder and the separator tube, which allows the positive and negative electrode materials to leak at will. In particular, the negative electrode material often seeps out through the gap between the sealing ring and the separator tube or through the gap between the sealing ring and the negative electrode rod. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing cylindrical alkaline battery sealing ring, which has a simple and weak sealing fit with other components, making it easy for the positive and negative electrode materials to leak out, this utility model provides a new type of cylindrical battery casing with high leakage resistance.

[0006] The technical solution of this utility model to solve its technical problem is: a novel cylindrical battery casing with high leakage resistance, comprising:

[0007] The positive electrode cylinder is hollow inside, with one end serving as the positive terminal of the battery casing and the other end having an opening.

[0008] The negative terminal plate serves as the negative terminal of the battery casing and is fitted to cover the opening of the positive terminal cylinder.

[0009] A separator tube is inserted into the positive electrode cylinder, and its interior is also hollow with an opening at one end, thereby dividing the internal space of the positive electrode cylinder into a first chamber and a second chamber.

[0010] The first chamber is located inside the partition tube and is used to contain the negative electrode material;

[0011] The second chamber is located between the outer wall of the separator tube and the inner wall of the positive electrode cylinder, and is used to contain the positive electrode material.

[0012] The negative electrode rod has one end abutting against the inside of the negative electrode plate, and the other end inserted into the negative electrode material located in the first chamber.

[0013] Also includes:

[0014] A thick-walled sealing ring is sandwiched between the positive electrode cylinder and the negative electrode plate. A first sealing structure is provided between the thick-walled sealing ring and the opening of the separator tube, and a sealing fit is formed between the thick-walled sealing ring and the opening of the separator tube by the first sealing structure. A second sealing structure is also provided between the thick-walled sealing ring and the negative electrode rod, and a sealing fit is formed between the thick-walled sealing ring and the negative electrode rod by the second sealing structure.

[0015] Furthermore, the thick-walled sealing ring is made of a soft material.

[0016] Furthermore, the first sealing structure includes an inclined abutment surface disposed at the bottom of the thick-walled sealing ring, and the sidewall at the opening of the partition tube is also inclined, and the sidewall at the opening of the partition tube forms an abutment fit with the abutment surface.

[0017] Furthermore, a sealing plug is also provided at the bottom of the thick-walled sealing ring, which is connected to the abutment surface. The sealing plug extends into the partition tube through the opening of the partition tube, and a fitting groove is provided at the junction of the sealing plug and the abutment surface. The end of the side wall at the opening of the partition tube is fitted with the fitting groove.

[0018] Furthermore, during the process of the thick-walled sealing ring engaging with the partition tube, the sealing plug extends into the partition tube, and through relative compression of the two, the sidewall of the partition tube opening is compressed and passes over the sidewall of the fitting groove, thereby entering and fitting into the fitting groove.

[0019] Furthermore, the second sealing structure includes a connecting hole at the center of the thick-walled sealing ring, through which the negative electrode rod passes. The inner wall of the connecting hole is tightly fitted with the side wall of the negative electrode rod. A connecting groove communicating with the connecting hole is also provided at the top of the thick-walled sealing ring. The top of the thick-walled sealing ring abuts against the inner side of the negative end plate, thereby forming a sealing cavity by the inner side of the negative end plate and the connecting groove. The head of the negative electrode rod is located in the sealing cavity.

[0020] Furthermore, the bottom of the connecting groove is provided with several concentric sealing ribs, which abut against the lower side of the negative electrode head.

[0021] Furthermore, the opening of the positive electrode cylinder is sealed by bending, and the side of the thick-walled sealing ring is also bent to form a bent section. The upper side of the bent section is tightly fitted with the inner wall of the opening of the positive electrode cylinder, while the lower side of the bent section is tightly fitted with the upper side of the negative electrode plate. This allows the bent section to fill the space between the opening of the positive electrode cylinder and the negative electrode plate, forming a sealed fit between them.

[0022] Furthermore, since the thick-walled sealing ring is made of a soft material, as the opening of the positive electrode cylinder is bent and sealed, the side of the thick-walled sealing ring will bend and extend due to the compression, thereby filling the space between the opening of the positive electrode cylinder and the negative electrode plate.

[0023] Furthermore, a reinforcing rib is protruding from the upper edge of the negative end plate, and a reinforcing groove is provided on the lower side of the bent section of the corresponding thick-walled sealing ring, with the reinforcing rib inserted into the reinforcing groove.

[0024] Furthermore, a recessed limiting groove is formed on the side wall of the positive electrode cylinder near the opening by compression. The inner wall of the limiting groove abuts against the lower side of the thick-walled sealing ring, thereby limiting the lower side of the thick-walled sealing ring.

[0025] The assembly process of this utility model is as follows: First, the separator tube is assembled into the positive electrode cylinder, and negative electrode material and positive electrode material are injected into the first chamber and the second chamber respectively. Then, the negative electrode rod is pre-inserted into the thick-walled sealing ring through the connecting groove and connecting hole. Next, the thick-walled sealing ring and the negative electrode rod are installed into the positive electrode cylinder, and the thick-walled sealing ring is pressed down to make the sealing plug extend into the separator tube, and the opening side wall of the separator tube fits into the fitting groove. Then, the negative end plate is placed above the thick-walled sealing ring. Finally, the side wall of the opening of the positive electrode cylinder is bent and a limiting groove is pressed into the side wall of the positive electrode cylinder, thereby fixing the various parts together.

[0026] The beneficial effects of this utility model are as follows:

[0027] 1. By setting a thick-walled sealing ring, the sealing of this product is more stable. Furthermore, by setting a first sealing structure and a second sealing structure respectively, the sealing fit between the thick-walled sealing ring and the separator tube, as well as between the thick-walled sealing ring and the negative electrode rod, is further strengthened, thereby solving the problem of easy leakage of negative electrode material in existing cylindrical alkaline batteries.

[0028] 2. An abutment surface and a sealing plug are provided, and a fitting groove is opened at the junction of the two for mating with the side wall of the partition tube opening. This solves the problem of insufficient sealing fit between the original thick-walled sealing ring and the partition tube. At the same time, the structure is relatively simple and easy to assemble during the production process.

[0029] 3. Connecting holes and grooves for connecting the negative electrode rod are made on the thick-walled sealing ring, and several sealing ribs are set at the bottom of the groove. Even if the negative electrode material in the separator tube seeps out through the gap between the connecting hole and the negative electrode rod, it will eventually be blocked by these sealing ribs. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] Figure 2 This is an exploded schematic diagram of this utility model.

[0032] Figure 3 This is a cross-sectional view of the present invention.

[0033] Figure 4 This is a schematic diagram of the upper side of the thick-walled sealing ring of this utility model.

[0034] Figure 5 This is a schematic diagram of the lower side of the thick-walled sealing ring of this utility model. Detailed Implementation

[0035] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0037] Example

[0038] Combination Figures 1 to 5The diagram illustrates a novel, highly leak-resistant cylindrical battery casing, comprising a positive electrode cylinder 1, a negative electrode plate 2, a separator tube 3, and a negative electrode rod 6. The positive electrode cylinder is hollow, with one end serving as the positive electrode of the battery casing and the other end having an opening. The negative electrode plate 2 serves as the negative electrode of the battery casing and fits over the opening of the positive electrode cylinder 1. The separator tube 3 passes through the positive electrode cylinder 1 and is also hollow with an opening at one end, thereby dividing the internal space of the positive electrode cylinder 1 into a first chamber 4 and a second chamber 5. The first chamber 4 is located inside the separator tube 3 and is used to contain the negative electrode material. The second chamber 5 is located between the outer wall of the separator tube 3 and the inner wall of the positive electrode cylinder 1. The positive electrode is located between the positive electrode cylinder 1 and the negative electrode plate 2, and one end of the negative electrode rod 6 is abutted against the inner side of the negative electrode plate 2, while the other end is inserted into the negative electrode material located in the first chamber 4. The chamber also includes a thick-walled sealing ring 7, which is sandwiched between the positive electrode cylinder 1 and the negative electrode plate 2. A first sealing structure 8 is provided between the thick-walled sealing ring 7 and the opening of the separator tube 3, forming a sealed fit between the thick-walled sealing ring 7 and the opening of the separator tube 3. A second sealing structure 9 is also provided between the thick-walled sealing ring 7 and the negative electrode rod 6, forming a sealed fit between the thick-walled sealing ring 7 and the negative electrode rod 6.

[0039] In this embodiment, the thick-walled sealing ring 7 is made of a soft material.

[0040] In this embodiment, the first sealing structure 8 includes an inclined abutment surface 10 disposed at the bottom of the thick-walled sealing ring 7, and the side wall at the opening of the partition tube 3 is also inclined, and the side wall at the opening of the partition tube 3 forms an abutment fit with the abutment surface 10.

[0041] In this embodiment, a sealing plug 11 is also provided at the bottom of the thick-walled sealing ring 7 and is connected to the abutment surface 10. The sealing plug 11 extends into the partition tube 3 through the opening of the partition tube 3. A fitting groove 12 is also provided at the junction of the sealing plug 11 and the abutment surface 10. The end of the side wall at the opening of the partition tube 3 is fitted with the fitting groove 12.

[0042] In this embodiment, during the process of the thick-walled sealing ring 7 cooperating with the partition tube 3, the sealing plug 11 extends into the partition tube 3, and by relatively squeezing the two, the side wall of the opening of the partition tube 3 can be squeezed and passed over the side wall of the fitting groove 12, thereby entering and fitting into the fitting groove 12.

[0043] In this embodiment, the second sealing structure 9 includes a connecting hole 13 opened at the center of the thick-walled sealing ring 7. The negative electrode rod 6 passes through the connecting hole 13. The inner wall of the connecting hole 13 is tightly fitted with the side wall of the negative electrode rod 6. A connecting groove 14 communicating with the connecting hole 13 is also opened at the top of the thick-walled sealing ring 7. The top of the thick-walled sealing ring 7 abuts against the inner side of the negative end plate 2, so that the inner side of the negative end plate 2 and the connecting groove 14 cooperate to form a sealing cavity 15. The head of the negative electrode rod 6 is located in the sealing cavity 15.

[0044] In this embodiment, the bottom of the connecting groove 14 is also provided with several concentric sealing ribs 16, and the sealing ribs 16 form an abutting fit with the lower side of the head of the negative electrode rod 6.

[0045] In this embodiment, the opening of the positive electrode cylinder 1 is sealed by bending, and the side of the thick-walled sealing ring 7 is also bent to form a bent section 17. The upper side of the bent section 17 is tightly fitted with the inner wall of the opening of the positive electrode cylinder 1, and the lower side of the bent section 17 is tightly fitted with the upper side of the negative electrode plate 2, so that the bent section 17 fills the space between the opening of the positive electrode cylinder 1 and the negative electrode plate 2, and forms a sealed fit with both.

[0046] In this embodiment, since the thick-walled sealing ring 7 is made of a soft material, as the opening of the positive electrode cylinder 1 is bent and sealed, the side of the thick-walled sealing ring 7 will bend and extend due to the compression, thereby filling the space between the opening of the positive electrode cylinder 1 and the negative electrode plate 2.

[0047] In this embodiment, a reinforcing rib 18 is protruding from the upper edge of the negative end plate 2, and a reinforcing groove 19 is provided on the lower side of the bent section 17 of the corresponding thick-walled sealing ring 7, and the reinforcing rib 18 is inserted into the reinforcing groove 19.

[0048] In this embodiment, a recessed limiting groove 20 is formed on the side wall of the positive electrode cylinder 1 near the opening by compression. The inner wall of the limiting groove 20 abuts against the lower side of the thick-walled sealing ring 7, thereby limiting the lower side of the thick-walled sealing ring 7.

[0049] The assembly process of this embodiment is as follows: First, the separator tube 3 is assembled into the positive electrode cylinder 1, and negative electrode material and positive electrode material are injected into the first chamber 4 and the second chamber 5 respectively. Then, the negative electrode rod 6 is pre-inserted into the thick-walled sealing ring 7 through the connecting groove 14 and the connecting hole 13. Then, the thick-walled sealing ring 7 and the negative electrode rod 6 are installed into the positive electrode cylinder 1, and the thick-walled sealing ring 7 is pressed down so that the sealing plug 11 extends into the separator tube 3, and the opening side wall of the separator tube 3 fits into the fitting groove 12. Then, the negative end plate 2 is placed above the thick-walled sealing ring 7. Finally, the side wall of the opening of the positive electrode cylinder 1 is bent and the limiting groove 20 is pressed into the side wall of the positive electrode cylinder 1, thereby fixing the various parts together.

[0050] The advantage of this embodiment is that it effectively improves the sealing between various parts of the battery casing and solves the problem of easy leakage of positive and negative electrode materials in the original cylindrical alkaline battery.

[0051] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A novel cylindrical battery casing with high leakage resistance, comprising: Positive electrode cylinder (1) is hollow inside, with one end serving as the positive terminal of the battery casing and the other end having an opening. The negative terminal plate (2) serves as the negative terminal of the battery casing and is fitted to cover the opening of the positive terminal cylinder (1). A separator tube (3) is inserted inside the positive electrode cylinder (1), and its interior is also hollow with an opening at one end, thereby dividing the internal space of the positive electrode cylinder (1) into a first chamber (4) and a second chamber (5). The first chamber (4) is located inside the partition tube (3) and is used to contain the negative electrode material; The second chamber (5) is located between the outer wall of the separator tube (3) and the inner wall of the positive electrode cylinder (1), and is used to contain the positive electrode material; The negative electrode rod (6) has one end abutting against the inside of the negative electrode plate (2) and the other end inserted into the negative electrode material located in the first chamber (4); Its characteristic is that it further includes: A thick-walled sealing ring (7) is sandwiched between the positive electrode cylinder (1) and the negative electrode plate (2). A first sealing structure (8) is provided between the thick-walled sealing ring (7) and the opening of the separator tube (3). The thick-walled sealing ring (7) and the opening of the separator tube (3) form a sealed fit with each other by the first sealing structure (8). A second sealing structure (9) is also provided between the thick-walled sealing ring (7) and the negative electrode rod (6). The thick-walled sealing ring (7) and the negative electrode rod (6) form a sealed fit with each other by the second sealing structure (9).

2. The novel cylindrical battery casing with high leakage resistance according to claim 1, characterized in that: The first sealing structure (8) includes an inclined abutment surface (10) disposed at the bottom of the thick-walled sealing ring (7), and the side wall at the opening of the partition tube (3) is also inclined, and the side wall at the opening of the partition tube (3) forms an abutment fit with the abutment surface (10).

3. A novel cylindrical battery casing with high leakage resistance according to claim 2, characterized in that: The bottom of the thick-walled sealing ring (7) is also provided with a sealing plug (11) that is connected to the abutment surface (10). The sealing plug (11) extends into the partition tube (3) through the opening of the partition tube (3). A fitting groove (12) is also provided at the junction of the sealing plug (11) and the abutment surface (10). The end of the side wall at the opening of the partition tube (3) is fitted with the fitting groove (12).

4. A novel cylindrical battery casing with high leakage resistance according to claim 1, characterized in that: The second sealing structure (9) includes a connecting hole (13) opened at the center of the thick-walled sealing ring (7). The negative electrode rod (6) passes through the connecting hole (13). The inner wall of the connecting hole (13) is tightly fitted with the side wall of the negative electrode rod (6). A connecting groove (14) communicating with the connecting hole (13) is also opened at the top of the thick-walled sealing ring (7). The top of the thick-walled sealing ring (7) abuts against the inner side of the negative end plate (2), so that the inner side of the negative end plate (2) and the connecting groove (14) cooperate to form a sealing cavity (15). The head of the negative electrode rod (6) is located in the sealing cavity (15).

5. A novel cylindrical battery casing with high leakage resistance according to claim 4, characterized in that: The bottom of the connecting groove (14) is also provided with several concentric sealing ribs (16), and the sealing ribs (16) form an abutting fit with the lower side of the head of the negative electrode rod (6).

6. A novel cylindrical battery casing with high leakage resistance according to claim 1, characterized in that: The opening of the positive electrode cylinder (1) is sealed by bending, and the side of the thick-walled sealing ring (7) is also bent to form a bent section (17). The upper side of the bent section (17) is tightly fitted with the inner wall of the opening of the positive electrode cylinder (1), and the lower side of the bent section (17) is tightly fitted with the upper side of the negative electrode plate (2), so that the bent section (17) fills the space between the opening of the positive electrode cylinder (1) and the negative electrode plate (2) and forms a sealed fit with both.

7. A novel cylindrical battery casing with high leakage resistance according to claim 6, characterized in that: A reinforcing rib (18) is protruding from the upper edge of the negative end plate (2), and a reinforcing groove (19) is provided on the lower side of the bent section (17) of the corresponding thick-walled sealing ring (7), and the reinforcing rib (18) is inserted into the reinforcing groove (19).

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