Explosion-proof battery

Abstract

The utility model discloses an explosion-proof battery which comprises a zinc shell, a positive electrode cap connected to the upper end of the zinc shell, electrolyte filled in the zinc shell, a carbon rod positioned in the zinc shell and connected with the positive electrode cap, and isolation paper arranged between the electrolyte and the inner wall of the zinc shell, the lower end of the positive electrode cap is connected with a conductive cap, the lower end of the conductive cap arches upwards to form a socket, the upper end of the carbon rod is inserted into the socket, a partition plate is fixedly arranged in the positive electrode cap, a vertical guide column is connected between the center of the partition plate and the upper end of the positive electrode cap, the partition plate is provided with a plurality of communicating holes, and the guide column is sleeved with a pressing plate capable of moving vertically. The pressing plate covers the communicating holes, the upper end of the pressing plate is connected with the upper end of the positive electrode cap through first springs arranged on the guide columns in a sleeving mode, gaps are formed between the periphery of the pressing plate and an inner wall support of the positive electrode cap, and small holes communicating with the interior of the positive electrode cap are formed in the side wall of the positive electrode cap. According to the explosion-proof battery, the pressure of the battery of which the internal pressure is increased due to a large amount of gas generated inside can be relieved, so that the explosion-proof effect is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an explosion-proof battery. Background Art

[0002] Dry cell batteries are chemical batteries that use a paste-like electrolyte to generate direct current. Primary batteries are commonly used in daily life and can be used in many electrical appliances. During the use of the battery, an air chamber is provided between the sealing ring and the electrolyte to buffer the pressure and temporarily store the gas generated by the battery to prevent the battery from deforming or even exploding. However, if the battery temperature is too high or over-discharge occurs, a large amount of gas will be generated inside the battery, causing the internal pressure to increase, causing the battery to deform or even explode. Therefore, an explosion-proof structure needs to be provided inside the battery. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides an explosion-proof battery.

[0004] In order to achieve the above technical effects, the utility model adopts the following scheme:

[0005] An explosion-proof battery comprises a zinc shell, a positive electrode cap connected to the upper end of the zinc shell, an electrolyte filled in the zinc shell, a carbon rod located in the zinc shell and connected to the positive electrode cap, and a separator paper arranged between the electrolyte and the inner wall of the zinc shell; the lower end of the positive electrode cap is connected to a conductive cap, the lower end of the conductive cap is arched upward to form a socket, the upper end of the carbon rod is inserted into the socket, a partition is fixedly arranged in the positive electrode cap, a vertical guide column is connected between the center of the partition and the upper end of the positive electrode cap, a plurality of connecting holes are arranged on the partition, a vertically movable pressing plate is sleeved on the guide column, the pressing plate covers the plurality of connecting holes, the upper end of the pressing plate is connected to the upper end of the positive electrode cap by sleeved with a first spring on the guide column, the pressing plate has gaps around the inner wall bracket of the positive electrode cap, and a small hole connected to the inside of the positive electrode cap is arranged on the side wall of the positive electrode cap.

[0006] According to a preferred technical solution, two circles of first sealing rings are provided between the pressure plate and the partition plate, the two circles of first sealing rings are both provided around the guide column, and a plurality of connecting holes are located between the two circles of first sealing rings.

[0007] According to a preferred technical solution, the lower edge of the positive electrode cap extends outward, bends, extends upward, and then extends outward, forming a first groove and a first protrusion distributed from the inside to the outside and arranged upward; the upper edge of the zinc shell extends inward, bends, extends downward, and then extends inward, forming a second protrusion and a second groove distributed from the inside to the outside and arranged downward, the second protrusion is matched and inlaid with the first groove, the second groove is matched and inlaid with the first protrusion, and a second sealing ring is provided between the first protrusion and the second groove.

[0008] According to a preferred technical solution, a connecting edge is provided on the lower edge of the conductive cap extending outward, the connecting edge is welded to the lower end of the positive electrode cap, and a plurality of ventilation holes are provided on the connecting edge.

[0009] According to a preferred technical solution, an insulating groove matching the lower end of the carbon rod is provided at the bottom of the zinc shell, and a second spring is connected between the bottom of the insulating groove and the lower end of the carbon rod.

[0010] Compared with the prior art, the beneficial effects are:

[0011] The utility model has a simple structure and is easy to use. The pressure plate is pressed against the partition to close a plurality of connecting holes through the elastic force of the first spring, thereby forming a seal. After high pressure is generated in the battery, the high pressure will lift the pressure plate through the connecting holes, thereby generating a gap between the pressure plate and the partition for pressure relief. The utility model can relieve the pressure of a battery in which a large amount of gas is generated and the internal pressure increases, thereby achieving explosion prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part A in the figure.

[0014] Figure numerals: 1, zinc shell; 2, positive electrode cap; 3, electrolyte; 4, isolation paper; 5, carbon rod; 6, second protrusion; 7, second slot; 8, second sealing ring; 9, first protrusion; 10, first slot; 11, conductive cap; 12, connecting edge; 13, vent; 14, partition; 15, connecting hole; 16, guide column; 17, pressure plate; 18, first sealing ring; 19, small hole; 20, insulating groove; 21, second spring. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] An explosion-proof battery, comprising a zinc shell 1, a positive electrode cap 2 connected to the upper end of the zinc shell 1, an electrolyte 3 filled in the zinc shell 1, a carbon rod 5 located in the zinc shell 1 and connected to the positive electrode cap 2, and a separation paper 4 arranged between the electrolyte 3 and the inner wall of the zinc shell 1;

[0017] The lower end of the positive electrode cap 2 is connected to a conductive cap 11, the lower end of the conductive cap 11 is arched upward to form a socket, the upper end of the carbon rod 5 is inserted into the socket, the conductive cap 11 is electrically connected to the positive electrode cap 2, and the carbon rod 5 is connected to the positive electrode cap 2 through the conductive cap 11;

[0018] A partition 14 is fixedly provided inside the positive electrode cap 2, a vertical guide column 16 is connected between the center of the partition 14 and the upper end of the positive electrode cap 2, the partition 14 is provided with a plurality of connecting holes 15, a vertically movable pressing plate 17 is sleeved on the guide column 16, the pressing plate 17 covers the plurality of connecting holes 15, the upper end of the pressing plate 17 is connected to the upper end of the positive electrode cap 2 by a first spring (not shown in the figure) sleeved on the guide column 16, in a natural state, the pressing plate 17 is pressed against the partition 14 by the pressure of the first spring to seal the plurality of connecting holes 15, thereby sealing the interior of the battery, the pressing plate 17 has a gap around it and the inner wall bracket of the positive electrode cap 2, and the side wall of the positive electrode cap 2 has a small hole 19 connected to the interior of the positive electrode cap 2.

[0019] The pressure plate 17 is pressed against the partition 14 by the elastic force of the first spring to close a plurality of connecting holes 15, thereby forming a seal. When high pressure is generated in the battery, the high pressure will lift up the pressure plate 17 through the connecting holes 15, thereby generating a gap between the pressure plate 17 and the partition 14 for pressure relief. The utility model can relieve the pressure of a battery that generates a large amount of gas inside and causes an increase in internal pressure, thereby achieving explosion-proofing.

[0020] According to a preferred technical solution, two circles of first sealing rings 18 are provided between the pressure plate 17 and the partition plate 14 . The two circles of first sealing rings 18 are both provided around the guide column 16 , and a plurality of connecting holes 15 are located between the two circles of first sealing rings 18 .

[0021] When the spring presses the pressure plate 17 onto the partition 14 , two circles of the first sealing ring 18 are compressed, thereby improving the sealing performance between the pressure plate 17 and the partition 14 .

[0022] According to a preferred technical solution, the lower edge of the positive electrode cap 2 extends outward, bends, extends upward, and then extends outward, forming a first groove 10 and a first protrusion 9 distributed from the inside to the outside and arranged upward; the upper edge of the zinc shell 1 extends inward, bends, extends downward, and then extends inward, forming a second protrusion 6 and a second groove 7 distributed from the inside to the outside and arranged downward, the second protrusion 6 is matched with the first groove 10 and inlaid, the second groove 7 is matched with the first protrusion 9 and inlaid, and a second sealing ring 8 is provided between the first protrusion 9 and the second groove 7.

[0023] In this way, the continuously bent structures are connected after being attached to each other, thereby improving the sealing performance. In addition, by interposing a second sealing ring 8, the sealing performance of the battery is further improved.

[0024] According to a preferred technical solution, a connecting edge 12 is provided on the lower edge of the conductive cap 11 extending outward, and the connecting edge 12 is welded to the lower end of the positive electrode cap 2. A plurality of vent holes 13 are provided on the connecting edge 12, and the vent holes 13 connect the inner wall of the zinc shell 1 with the inside of the positive electrode cap 2, so that the high voltage generated in the zinc shell 1 can diffuse to the positive electrode cap 2 and then squeeze the pressure plate 17 through the connecting hole 15.

[0025] According to a preferred technical solution, the bottom of the zinc shell 1 is provided with an insulating groove 20 matching the lower end of the carbon rod 5 , and a second spring 21 is connected between the bottom of the insulating groove 20 and the lower end of the carbon rod 5 .

[0026] The carbon rod 5 is pushed upward by the elastic force of the spring, so that the upper end of the carbon rod 5 can be stably inserted into the socket, thereby preventing the carbon rod 5 from falling out of the socket and causing poor contact.

[0027] In the description of the present utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present 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 and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. An explosion-proof battery, characterized in that: The invention comprises a zinc shell (1), a positive electrode cap (2) connected to the upper end of the zinc shell (1), an electrolyte (3) filled in the zinc shell (1), a carbon rod (5) located in the zinc shell (1) and connected to the positive electrode cap (2), and a separation paper (4) arranged between the electrolyte (3) and the inner wall of the zinc shell (1); the lower end of the positive electrode cap (2) is connected to a conductive cap (11), the lower end of the conductive cap (11) is arched upward to form a socket, the upper end of the carbon rod (5) is inserted into the socket, and a partition (14) is fixedly provided in the positive electrode cap (2), the center of the partition (14) is aligned with the positive electrode cap ( 2), a vertical guide column (16) is connected between the upper ends of the partition (14), a plurality of connecting holes (15) are provided on the partition (14), a vertically movable pressure plate (17) is sleeved on the guide column (16), the pressure plate (17) covers the plurality of connecting holes (15), the upper end of the pressure plate (17) is connected to the upper end of the positive electrode cap (2) by sleeved with a first spring on the guide column (16), the pressure plate (17) has a gap around it and the inner wall bracket of the positive electrode cap (2), and the side wall of the positive electrode cap (2) has a small hole (19) connected to the inside of the positive electrode cap (2).

2. The explosion-proof battery according to claim 1, characterized in that: Two circles of first sealing rings (18) are arranged between the pressure plate (17) and the partition plate (14), and the two circles of first sealing rings (18) are arranged around the guide column (16), and a plurality of communication holes (15) are located between the two circles of first sealing rings (18).

3. The explosion-proof battery according to claim 1, characterized in that: The lower edge of the positive electrode cap (2) extends outward, bends, extends upward, and then extends outward, forming a first groove (10) and a first protrusion (9) distributed from the inside to the outside and arranged upward; the upper edge of the zinc shell (1) extends inward, bends, extends downward, and then extends inward, forming a second protrusion (6) and a second groove (7) distributed from the inside to the outside and arranged downward, the second protrusion (6) and the first groove (10) are matched and embedded, the second groove (7) and the first protrusion (9) are matched and embedded, and a second sealing ring (8) is provided between the first protrusion (9) and the second groove (7).

4. The explosion-proof battery according to claim 1, characterized in that: The lower edge of the conductive cap (11) is extended outward to form a connecting edge (12), the connecting edge (12) is welded to the lower end of the positive electrode cap (2), and a plurality of ventilation holes (13) are formed on the connecting edge (12).

5. The explosion-proof battery according to claim 1, characterized in that: The bottom of the zinc shell (1) is provided with an insulating groove (20) matching the lower end of the carbon rod (5), and a second spring (21) is connected between the bottom of the insulating groove (20) and the lower end of the carbon rod (5).

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