A high energy density alkaline battery

Abstract

The utility model discloses a high energy density alkaline battery, including battery main part and set up at the top of battery main part's pressure relief ring. The ring wall of pressure relief ring is evenly provided with a plurality of exhaust holes, and the inside of pressure relief ring is equipped with first ring piece and second ring piece, and the bottom surface of second ring piece is fixedly installed with the abutment ring, and the bottom surface of abutment ring and the top surface of first ring piece are elastically contacted. First ring piece and second ring piece are arranged staggeredly and form the flow channel extending in a ring direction therebetween, and the flow channel is communicated with the exhaust hole. Through the above structure, when the gas is produced in the high energy density discharge process inside battery main part, the gas can be introduced into the exhaust hole along the flow channel and be discharged smoothly, realizes pressure slow release, avoids the problem of local stress concentration or poor exhaust. The utility model can guarantee the high energy density of battery, improve the exhaust efficiency and safety, prevent the battery shell from swelling or sealing failure, and has the advantages of reasonable structure, safety and reliability and suitable for popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of alkaline battery technology, specifically a high-energy-density alkaline battery. Background Technology

[0002] Alkaline batteries are a type of electrochemical battery that uses zinc as the negative electrode, manganese dioxide as the positive electrode, and potassium hydroxide solution as the electrolyte. Due to their advantages such as large capacity, stable discharge platform, and long storage life, they are widely used in portable electronic devices, lighting devices, and various electrical appliances. With the continuous enhancement of electronic product functions, higher demands are being placed on the energy density of power supplies, and high-energy-density alkaline batteries are gradually becoming a key area of ​​research and application.

[0003] In existing technologies, high-energy-density alkaline batteries typically achieve increased energy density by increasing the amount of active material loaded and reducing the thickness of the casing and seals. However, due to the increased active material loading and more vigorous internal reactions, the battery is prone to generating more gas during use, leading to increased internal pressure. If the venting structure is poorly designed, the following problems may occur: First, gas accumulation inside the battery can cause the casing to bulge or even rupture, posing a safety hazard; second, some existing alkaline batteries use single-hole or straight-through venting structures, which have short venting paths and poor dispersion, making them prone to blockage by impurities or electrolyte deposits, resulting in poor venting; third, some batteries lack effective buffering and guiding structures, allowing gas to directly impact the sealing components during sudden increases in internal pressure, easily causing seal failure or electrolyte leakage.

[0004] Therefore, how to ensure the energy density of alkaline batteries while achieving efficient venting and pressure release through structural design to avoid safety issues caused by excessive internal pressure has become a pressing technical challenge in the field of high-energy-density alkaline batteries. Utility Model Content

[0005] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by this utility model is as follows: a high-energy-density alkaline battery, comprising a battery body and a pressure relief ring disposed at the top of the battery body. The pressure relief ring has several vent holes evenly distributed on its ring wall. Inside the pressure relief ring are a first ring plate and a second ring plate. A stop ring is fixedly installed on the bottom surface of the second ring plate, and the bottom surface of the stop ring elastically abuts against the top surface of the first ring plate. The first and second ring plates are arranged alternately to form a circumferentially extending flow channel, which is connected to the vent holes. Thus, when gas is generated inside the battery body, it can be smoothly discharged through the flow channel into the vent holes, ensuring the safe use of the battery.

[0007] In a preferred example, the first and second ring plates are made of alkali-resistant metals or composite materials, which can maintain stability in environments with long-term contact with electrolytes and alkaline gases, avoid corrosion and deformation, and thus improve the overall service life of the battery.

[0008] In a preferred example, the abutment ring is a corrosion-resistant rubber component, and the bottom surface of the abutment ring is arc-shaped and elastically abuts against the top surface of the first ring piece. Through the combination of the arc-shaped structure and the elastic material, it can deform when the internal pressure of the battery increases, playing a dual role of buffering and sealing, ensuring that the pressure relief process is stable and controllable.

[0009] In a preferred example, the vents are arranged circumferentially at equal intervals and there are no fewer than six vents, so that the gas inside the battery body can be discharged evenly from multiple directions, avoiding local pressure concentration that could cause damage to the casing and improving the overall venting efficiency and safety.

[0010] In a preferred example, the inner wall of the vent hole forms a smooth transition structure with the flow channel, which avoids turbulence and blockage of gas at the flow channel turning point, effectively reduces exhaust resistance, and reduces the deposition of impurities or electrolyte on the vent wall, keeping the exhaust channel unobstructed for a long time.

[0011] In a preferred example, the outer periphery of the first ring plate engages with the inner wall of the pressure relief ring, and the inner side of the second ring plate engages with the inner wall of the pressure relief ring, thereby forming an approximately Z-shaped flow channel inside the pressure relief ring. This flow channel guides the gas while having a certain tortuous path, which can effectively buffer the gas flow rate and prevent instantaneous impact from damaging the shell and seal.

[0012] This invention achieves efficient guidance and dispersion of gas inside an alkaline battery by setting a pressure relief ring at the top of the battery body and its internal multi-stage ring plates and abutment structure, and has the following beneficial effects: 1. In this utility model, the first and second ring plates inside the pressure relief ring are arranged alternately to form a circumferential flow channel. Combined with the exhaust holes on the ring wall, the gas inside the battery can be dispersed and discharged along the circumferential direction, avoiding concentrated impact and improving the stability and reliability of pressure relief.

[0013] 2. In this utility model, the retaining ring is made of corrosion-resistant rubber and has an arc-shaped design. When the internal pressure increases, it can generate elastic deformation and remain tightly fitted with the first ring, thereby achieving automatic pressure relief and dynamic sealing, which significantly improves the safety performance of the battery. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of a pressure relief ring structure according to an embodiment of the present invention; Figure 3This is a schematic diagram of the cross-sectional structure of the pressure relief ring according to an embodiment of the present invention; Figure 4 This is a partial cross-sectional structural diagram of the pressure relief ring according to an embodiment of the present invention.

[0015] Figure label: 100. Battery body; 200. Pressure relief ring; 201. Vent hole; 202. Flow channel; 210. First ring plate; 220. Second ring plate; 230. Abutment ring. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0017] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0018] The following describes, with reference to the accompanying drawings, some embodiments of the present invention that provide a high-energy-density alkaline battery.

[0019] Combination Figures 1-3 As shown, this utility model provides a high-energy-density alkaline battery, including a battery body 100 and a pressure relief ring 200 disposed at the top of the battery body 100. The pressure relief ring 200 has a plurality of vent holes 201 evenly distributed on its ring wall, serving as a channel for venting gas to the external environment when gas is generated inside the battery body 100. The pressure relief ring 200 has a first ring plate 210 and a second ring plate 220 inside, with a stop ring 230 fixedly mounted on the bottom surface of the second ring plate 220. The bottom surface of the stop ring 230 elastically abuts against the top surface of the first ring plate 210, enabling a sealed and buffered structure between the first ring plate 210 and the second ring plate 220. The first ring plate 210 and the second ring plate 220 are arranged alternately to form a circumferentially extending flow channel 202 between them. The flow channel 202 is connected to the exhaust port 201, so that the gas generated by the battery body 100 in working or abnormal state can first enter the flow channel 202 and then be smoothly discharged through the exhaust port 201, thus ensuring the safety of the battery.

[0020] In this embodiment, the first ring 210 and the second ring 220 are made of alkali-resistant metals or composite materials. By using alkali-resistant materials, good structural stability and corrosion resistance can be maintained for a long time in alkaline electrolyte and alkaline gas environments. They will not rust or deform due to long-term contact with electrolytes, thereby improving the service life and reliability of the pressure relief ring 200.

[0021] In this embodiment, the abutment ring 230 is a corrosion-resistant rubber component. The bottom surface of the abutment ring 230 has an arc-shaped structure and elastically abuts against the top surface of the first ring piece 210. Through the arc-shaped design and the elasticity of the rubber material, the abutment ring 230 can deform when the internal pressure of the battery body 100 increases, forming a buffer channel without compromising the sealing effect. This ensures that the gas depressurization process is stable and controllable, and avoids structural damage caused by instantaneous overpressure.

[0022] In this embodiment, the vent holes 201 are arranged equidistantly in a circumferential direction, and the number is not less than 6. By setting multiple equidistant vent holes 201 on the ring wall of the pressure relief ring 200, it can be ensured that the gas is uniformly distributed in the circumferential direction when it is discharged, avoiding the phenomenon of excessive local shell stress caused by concentrated discharge at a single point, thereby effectively improving the overall safety performance of the battery body 100.

[0023] In this embodiment, a smooth transition structure is formed between the inner wall of the vent 201 and the flow channel 202. This smooth transition structure reduces resistance to gas flow, preventing turbulence or blockage during venting. Simultaneously, this structure reduces the deposition of impurities or electrolyte at the connection between the vent 201 and the flow channel 202, maintaining the long-term unobstructed flow of the gas channel and thus improving the stability and reliability of the battery during use.

[0024] In this embodiment, the outer periphery of the first ring plate 210 is engaged with the inner wall of the pressure relief ring 200, and the inner side of the second ring plate 220 is engaged with the inner wall of the pressure relief ring 200. Through this combination of structures, the first ring plate 210 and the second ring plate 220 form an approximately Z-shaped flow channel 202 inside the pressure relief ring 200. This Z-shaped flow channel 202, while guiding the gas, can extend the gas flow path, achieving buffering and guiding of the airflow, preventing the instantaneous and rapid emission of gas from impacting the upper structure of the battery body 100, thereby making the exhaust process more stable.

[0025] In summary, this utility model, by adding a pressure relief ring 200 to the top of the battery body 100 and setting an alternating structure of a first ring plate 210, a second ring plate 220 and a stop ring 230 inside the pressure relief ring 200, combined with the design of the circumferential vent 201 and the Z-shaped flow channel 202, enables the battery to achieve stable, uniform and controllable venting function under high energy density, which significantly improves the safety and service life of the battery.

[0026] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-energy-density alkaline battery, characterized in that, The device includes a battery body (100) and a pressure relief ring (200) disposed at the top of the battery body (100). The pressure relief ring (200) has a plurality of vent holes (201) evenly distributed on its ring wall. The pressure relief ring (200) has a first ring plate (210) and a second ring plate (220) inside. A stop ring (230) is fixedly installed on the bottom surface of the second ring plate (220). The bottom surface of the stop ring (230) elastically abuts against the top surface of the first ring plate (210). The first ring plate (210) and the second ring plate (220) are arranged alternately to form a circumferentially extending flow channel (202). The flow channel (202) communicates with the vent holes (201) and is used to realize gas export and slow release when gas is generated inside the battery body (100).

2. The high-energy-density alkaline battery according to claim 1, characterized in that, The first ring plate (210) and the second ring plate (220) are made of alkali-resistant metal or composite material.

3. A high-energy-density alkaline battery according to claim 1, characterized in that, The abutment ring (230) is a corrosion-resistant rubber component, and the bottom surface of the abutment ring (230) is arc-shaped and elastically abuts against the top surface of the first ring piece (210).

4. A high-energy-density alkaline battery according to claim 1, characterized in that, The exhaust vents (201) are arranged circumferentially at equal intervals and there are no fewer than 6 of them, so as to ensure that the gas inside the battery body (100) can be discharged evenly.

5. A high-energy-density alkaline battery according to claim 1, characterized in that, The inner wall of the exhaust port (201) and the flow channel (202) have a smooth transition structure, which is used to reduce exhaust resistance and prevent impurity deposition.

6. A high-energy-density alkaline battery according to claim 1, characterized in that, The outer periphery of the first ring (210) is engaged with the inner wall of the pressure relief ring (200), and the inner side of the second ring (220) is engaged with the inner wall of the pressure relief ring (200), thereby forming a Z-shaped flow channel (202).

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