Battery cell structure for rapid water activation battery

Abstract

The invention relates to the technical field of seawater batteries, in particular to a cell structure for a rapid water-activated battery, which comprises: an electrode holder which is tubular, one end of the electrode holder is provided with an exhaust hole, and the other end of the electrode holder is provided with an auxiliary liquid inlet groove; the battery body is wound on the outer surface of the electrode holder, and an anode lead-out wire and a cathode lead-out wire of the battery body penetrate through the exhaust holes; and the positioning sheet is mounted on the electrode holder and is used for fixing the battery body on the electrode holder in the inner cavity of the shell of the water activated battery, so that the battery body is prevented from moving or being extruded in the inner cavity of the shell of the water activated battery. According to the scheme, the problems that in the activation process of a traditional seawater battery, an internal flow channel of the battery is unreasonable in design, when electrolyte (such as seawater) enters, air is compressed, the electrolyte is prevented from rapidly making contact with an electrode, and activation is slow are solved.

Description

Technical Field

[0001] This invention relates to the field of seawater battery technology, and more specifically to a cell structure for a fast water-activated battery. Background Technology

[0002] Seawater batteries are widely used in underwater acoustic testing devices, submarines, torpedoes, and emergency rescue equipment. In these applications, the batteries need to meet the following requirements: compact structure, high specific energy, high specific power, long storage life, and fast activation time.

[0003] Traditional seawater batteries, designed for long-term storage and to prevent premature reaction with moisture, employ a sealed structure that is broken during use. However, after breaking the seal, seawater needs to permeate to the electrode surface through internal channels. But in pursuit of compact design, traditional batteries often have narrow or tortuous channels and lack active flow guidance. This results in air compression during seawater filling of the electrode area, leading to slow seawater flow and insufficient coverage of the entire reaction cross-section. Consequently, traditional seawater batteries suffer from long activation times, poor performance at low temperatures, and complex structures. These issues limit their application in deep-sea exploration, emergency rescue equipment, and other fields requiring rapid response. A patent with publication number CN117855507A discloses a method for rapidly activating a seawater battery and its preparation. This invention relates to the field of seawater battery technology and includes the following steps: S1, immersing a current collector in a silver nitrate solution to load silver ions onto the surface of the current collector, then transferring it to a potassium chloride solution for immersion, followed by drying and roll forming to obtain a silver chloride electrode; S2, immersing the silver chloride electrode in a salt solution, then loading nano-sized sodium chloride particles onto the surface of the silver chloride electrode; S3, using the silver chloride electrode obtained in step S2 as the positive electrode and a magnesium alloy or aluminum alloy as the negative electrode to obtain the seawater battery. The rapid activation seawater battery preparation process provided by this invention is simple and low-cost, and can achieve rapid activation in seawater and low-temperature freshwater. Although this patent discloses a method for rapidly activating a seawater battery, it does not address the problem that traditional batteries, in pursuit of compact structure, often have narrow or tortuous flow channels and lack active flow guidance design, resulting in slow seawater filling of the electrode area and an inability to quickly cover the entire reaction cross-section. Summary of the Invention

[0004] The present invention aims to provide a cell structure for rapid water activation of batteries, in order to solve the problem that the internal flow channel design of traditional seawater batteries is unreasonable during the activation process. When the electrolyte (such as seawater) enters, the air is compressed, which hinders the rapid contact of the electrolyte with the electrode and leads to slow activation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cell structure for a fast water-activated battery, comprising: The electrode holder is tubular in shape, with an exhaust port at one end and an auxiliary liquid inlet at the other end. The battery body is wound around the outer surface of the electrode holder, and the positive and negative leads of the battery body pass through the vent hole. The positioning plate is installed on the electrode holder. The positioning plate is used to fix the battery body on the electrode holder in the inner cavity of the water-activated battery shell, so as to prevent the battery body from moving or being squeezed in the inner cavity of the water-activated battery shell.

[0006] Preferably, as an improvement, the electrode holder includes a tube body, an annular platform one, and an annular platform two. Annular platform one is fixed to the top of the tube body, the central axis of annular platform one is coaxial with the central axis of the tube body, the inner diameter of annular platform one is the same as the inner diameter of the tube body, and the outer diameter of annular platform one is larger than the outer diameter of the tube body. Annular platform two is fixedly installed on annular platform one, the central axis of annular platform two is coaxial with the central axis of annular platform one, and the outer diameter of annular platform two is larger than the outer diameter of annular platform one.

[0007] Preferably, as an improvement, the exhaust holes are provided in multiple manner, and the multiple exhaust holes are arranged in a ring array laterally in the circumferential direction of the ring platform, and the exhaust holes are in communication with the inside of the electrode holder.

[0008] Preferably, as an improvement, the top of the electrode holder is provided with multiple lead wire mounting slots, which connect the inside of the electrode holder with the outside.

[0009] Preferably, as an improvement, the auxiliary liquid inlet is provided in multiple ways, and the multiple auxiliary liquid inlet is arranged in a ring array on the electrode base, with one end of the auxiliary liquid inlet extending to the bottom end of the electrode base.

[0010] Preferably, as an improvement, the battery body comprises a single battery cell or is composed of multiple battery cells connected in series or in parallel.

[0011] Preferably, as an improvement, the positive and negative electrode plates of the battery cell are riveted together, and when multiple battery cells are connected in series or in parallel, two negative electrode plates sandwich one positive electrode plate or two positive electrode plates sandwich one negative electrode plate.

[0012] Preferably, as an improvement, the positioning piece is provided in two, the positioning piece is in a ring design, the inner wall of the positioning piece is in clearance fit with the outer wall of the electrode seat, and multiple mounting fins are evenly spaced and fixed in the circumferential direction of the positioning piece.

[0013] The principle and advantages of this solution are as follows: Before use, the battery cell structure is fixedly installed in the battery casing using positioning plates. The negative lead of the battery body passes through one of the lead mounting slots and connects to the electrical connector, while the positive lead of the battery body passes through one of the vent holes and connects to the electrical connector. During use, first open the cap at the bottom of the battery casing, and the electrolyte (such as seawater) will enter the inner cavity of the casing through the through-hole of the cap. The vent hole at one end of the electrode holder can quickly expel the air that was originally sealed between the inner cavity of the casing and the battery cell assembly. When the electrolyte enters, the internal gas is compressed and can enter the interior of the electrode holder through the annular array of vent holes, and then exit from the top of the electrode holder to the outside of the battery, avoiding the formation of gas pressure that hinders the flow of electrolyte. On the other hand, the auxiliary liquid inlet grooves, arranged in an annular array and extending to the bottom at the other end of the electrode holder, actively guide the electrolyte to flow quickly from the bottom of the electrode holder to the battery body wound around its outer surface. Simultaneously, the auxiliary liquid inlet grooves also allow the electrolyte to penetrate more evenly onto the positive / negative electrode reaction surfaces of the battery body, and also assist in the discharge of residual gas from the inner cavity of the electrode holder.

[0014] The positioning plate, through its cooperation with the electrode holder during electrolyte flow, stably fixes the electrode holder within the outer shell cavity, preventing the battery from moving or being squeezed due to electrolyte impact or external vibration. This ensures the integrity and structural stability of the positive and negative electrodes, avoiding the risk of short circuits. When the electrolyte fully contacts the positive and negative electrodes of the battery, an electrochemical reaction occurs between the electrodes and the electrolyte to generate electrical energy. This energy is then transferred to the external load through the positive and negative electrode leads, ultimately achieving rapid battery activation and efficient power output.

[0015] 1. Compared with existing technologies, traditional seawater batteries, due to the presence of internal air, hinder the rapid entry of seawater during the initial activation stage, thus affecting the activation speed and performance of the battery. This solution, through the design of the electrode holder and the venting holes on the electrode holder, can effectively remove the air inside the battery, allowing seawater to enter the battery more smoothly and accelerating the battery activation process. The design of the auxiliary liquid inlet tank further enhances the water intake efficiency of the seawater battery, guiding seawater into the battery in a more uniform and efficient manner, ensuring sufficient contact between the positive and negative electrodes and uniform distribution of electrolyte. This not only improves the activation speed and energy conversion efficiency of the battery, but also extends the battery's service life.

[0016] 2. By incorporating positioning plates, the battery cells are effectively protected from the risks of compression and short circuits, while also mitigating the impact of the electrolyte on the positive and negative electrode plates. The design of the positioning plates also considers the flow and distribution of the electrolyte; by precisely controlling the position and shape of the positioning plates, the electrolyte can be guided to distribute evenly within the battery. Because the battery cells are effectively protected and the electrolyte distribution is more rational, the overall performance of the battery is significantly improved.

[0017] 3. The battery is joined using a riveting method. During the riveting process, the rivet undergoes plastic deformation, causing its head to expand and tightly connect the two negative or positive and negative electrode plates together. This connection method has high strength and can withstand significant mechanical stress and vibration, ensuring the stability and safety of the battery under various operating conditions.

[0018] 4. The "two positive and one negative" winding design overturns the traditional parallel arrangement or simple stacking of positive and negative electrodes in batteries. By riveting two negative electrode sheets tightly clamping one positive electrode sheet, a new type of cell structure is formed. This structure not only improves the space utilization rate and reaction area of ​​the active materials inside the cell, but also makes the layout between the positive and negative electrodes more compact and reasonable, reducing the distance between the positive and negative electrodes, accelerating ion transport and water molecule penetration in seawater, and improving the battery's output power and energy conversion efficiency. This compact structure also helps to achieve higher battery capacity in the same volume, that is, improves energy density.

[0019] The "two negatives sandwiching one positive" winding structure allows heat to be distributed more evenly in the multi-layer electrode, and the heat between the positive and negative electrodes can be transferred and dispersed more quickly, thereby effectively reducing the safety hazards caused by excessive local temperature.

[0020] The “two negative plates sandwiching one positive plate” winding design, where the positive plate is wrapped in the middle of the negative plate, forms a natural short-circuit protection barrier. This design helps to reduce battery failures caused by external impacts or internal short circuits, thus improving the safety of the battery cell.

[0021] In the "two negative plates sandwiching one positive plate" wound structure, current can flow into and out of the positive plate more evenly through multiple layers of negative plates, thereby reducing uneven current density distribution. This helps to maintain the stability and reliability of the cell during high-power discharge.

[0022] The “two negative plates sandwiching one positive plate” winding method can be adjusted and optimized according to the specific needs of the battery. It can adapt to different battery capacity, voltage and discharge characteristics by changing the thickness, width or winding tightness of the positive and negative plates.

[0023] 6. The electrode holder is designed in a stepped shape with the bottom larger than the top. When the electrolyte flows inside the cavity, the cross-sectional area it flows through is constantly decreasing. Due to the decrease in cross-sectional area, the flow is accelerated, thereby increasing the flow rate of the electrolyte and further accelerating the activation speed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a cell for a fast water-activated battery according to the present invention.

[0025] Figure 2 for Figure 1 A sectional view from the front.

[0026] Figure 3 This is a schematic diagram of the electrode holder in an embodiment of the present invention.

[0027] Figure 4 This is a cross-sectional view of the front view of the electrode holder in an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the top view of the positioning piece in an embodiment of the present invention.

[0029] The reference numerals in the accompanying drawings include: negative electrode lead 1, positive electrode lead 2, annular platform 2, vent hole 4, annular platform 1, battery body 6, positioning piece 7, mounting wing 701, mounting hole 702, electrode seat 8, auxiliary liquid inlet groove 9, and lead mounting groove 10. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 1 ~Appendix Figure 5 As shown: A cell structure for a fast water-activated battery, comprising: The electrode holder 8 is tubular in shape, with multiple lead wire mounting slots 10 at its top, connecting the interior and exterior of the electrode holder 8. The electrode holder 8 includes an integrally formed tube body, an annular platform 5, and an annular platform 3. Annular platform 5 is fixed to the top of the tube body, its central axis is coaxial with the central axis of the tube body, its inner diameter is the same as the inner diameter of the tube body, and its outer diameter is larger than the outer diameter of the tube body. Annular platform 3 is fixedly mounted on annular platform 5, its central axis is coaxial with the central axis of annular platform 5, and its outer diameter is larger than the outer diameter of annular platform 5. Annular platform 5 has multiple vent holes 4 arranged in a ring array around its circumference, extending laterally through it. The tube body has multiple auxiliary liquid inlet grooves 9 arranged in a ring array, one end of which extends to the bottom of the tube body.

[0031] The battery body 6 is wound around the outer surface of the tube body. The battery body 6 consists of one or more battery cells connected in series or in parallel. The positive and negative electrode plates of the battery cells are riveted together by rivets. When multiple battery cells are connected in series or in parallel, two negative electrode plates sandwich one positive electrode plate or two positive electrode plates sandwich one negative electrode plate.

[0032] Two positioning pieces 7 are fitted onto the top and bottom of the tube body. The positioning pieces 7 are in a ring design. The inner wall of the positioning pieces 7 is in clearance fit with the outer wall of the tube body. Multiple mounting wing pieces 701 are evenly spaced around the circumference of the positioning pieces 7. The mounting wing pieces 701 are provided with mounting holes 702. The mounting holes 702 are used to fix the positioning pieces 7 onto the outer shell of the water-activated battery by using screws.

[0033] The specific implementation process is as follows: Apart from the battery cell assembly, the specific structure of a water battery includes a shell, electrical connectors, a fixing cover, and a plug. The electrical connectors are used to connect the positive and negative leads, so as to stably deliver the electrical energy generated by the battery cell to the external load.

[0034] The fixed cover has a through hole at the bottom, which is the key channel for the electrolyte (seawater) to enter the battery.

[0035] The cap is used to seal the through hole when the device is not activated, preventing impurities from entering. When activated, the cap needs to be opened to provide a channel for electrolyte to enter.

[0036] The outer casing is mostly made of rigid structure, with a plug on the top, battery cell assembly inside the cavity, and a fixing cover at the bottom to form a sealed cavity.

[0037] Before use, the battery cell structure is fixedly installed in the inner cavity of the battery casing using positioning pieces 7 and screws. The negative lead 1 of the battery body 6 passes through one of the lead mounting slots 10 and connects to the electrical connector, while the positive lead 2 of the battery body 6 passes through one of the vent holes 4 and connects to the electrical connector. During use, first pull open the cap at the bottom of the battery casing; the electrolyte (such as seawater) will then enter the inner cavity of the casing through the through-hole in the cap. The vent 4 at one end of the electrode holder 8 can quickly expel the air that was originally sealed between the inner cavity of the outer casing and the cell assembly. When the electrolyte enters, the internal gas is compressed and can be forced into the inside of the electrode holder 8 through the auxiliary liquid inlet groove 9, and then discharged from the top of the electrode holder 8 to the outside of the battery, thus avoiding the formation of gas pressure that hinders the flow of electrolyte. On the other hand, the auxiliary liquid inlet groove 9, which is arranged in a ring array and extends to the bottom of the other end of the electrode holder 8, will actively guide the electrolyte to flow quickly from the bottom of the electrode holder 8 to the battery body 6 wrapped around its outer surface. At the same time, the auxiliary liquid inlet groove 9 can also allow the electrolyte to penetrate more evenly into the positive / negative electrode reaction surface of the battery body 6, and also help the residual gas to be discharged from the inner cavity of the electrode holder 8.

[0038] During electrolyte flow, the positioning plate 7, through its annular body and the mounting wing 701 fixed to the outer shell, stably fixes the electrode seat 8 within the inner cavity of the outer shell, preventing the battery body 6 from moving or being squeezed due to electrolyte impact or external vibration. This ensures the integrity and structural stability of the positive / negative electrode plates and avoids the risk of short circuits. When the electrolyte fully contacts the positive / negative electrode plates of the battery body 6, an electrochemical reaction occurs between the positive / negative electrodes and the electrolyte to generate electrical energy. This electrical energy is transmitted to the external load through the positive / negative electrode leads of the battery body 6, ultimately achieving rapid battery activation and efficient power output.

[0039] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A quick water-activated battery cell structure, characterized by, The utility model relates to a water-activated battery electrode seat, which comprises: an electrode seat in a tubular arrangement, one end of the electrode seat being provided with exhaust holes, and the other end of the electrode seat being provided with auxiliary liquid inlet grooves; a battery body wound around the outer surface of the electrode seat, the positive and negative lead-out wires of the battery body being led out through the exhaust holes; a positioning sheet mounted on the electrode seat, the positioning sheet being used to fix the battery body on the electrode seat in the inner cavity of the shell of the water-activated battery, so as to avoid the movement or extrusion of the battery body in the inner cavity of the shell of the water-activated battery.

2. A quick water-activated battery cell structure according to claim 1, characterized in that: The electrode seat comprises a pipe body, an annular platform one and an annular platform two, the annular platform one being fixed at the top end of the pipe body, the central axis of the annular platform one being coaxial with the central axis of the pipe body, the inner diameter of the annular platform one being the same as the inner diameter of the pipe body, and the outer diameter of the annular platform one being greater than the outer diameter of the pipe body; the annular platform two is fixedly mounted on the annular platform one, the central axis of the annular platform two being coaxial with the central axis of the annular platform one, and the outer diameter of the annular platform two being greater than the outer diameter of the annular platform one.

3. A battery cell structure for a quick water-activated battery according to claim 2, wherein: The exhaust holes are arranged in multiple numbers and are arranged in a horizontal annular array on the circumference of the annular platform one, and the exhaust holes are in communication with the inside of the electrode seat.

4. A battery cell structure for a quick water-activated battery according to claim 3, wherein: The top end of the electrode seat is provided with multiple lead-out wire mounting grooves, which are in communication with the inside and outside of the electrode seat.

5. A quick water-activated battery cell structure according to claim 4, wherein: The auxiliary liquid inlet grooves are arranged in multiple numbers and are arranged in an annular array on the electrode seat, and one end of the auxiliary liquid inlet grooves extends to the bottom end of the electrode seat.

6. A battery cell structure for a quick water-activated battery according to claim 5, wherein: The battery body comprises one battery cell or a plurality of battery cells connected in series or parallel.

7. A quick water-activated battery cell structure according to claim 6, wherein: The positive and negative sheets of the battery cell are riveted by rivets, and when a plurality of battery cells are connected in series or parallel, two negative sheets are used to clamp one positive sheet or two positive sheets are used to clamp one negative sheet.

8. A battery cell structure for a quick water-activated battery according to claim 7, wherein: The positioning sheet is arranged in two numbers and is designed in an annular shape, the inner wall of the positioning sheet is in clearance fit with the outer wall of the electrode seat, and multiple mounting flaps are uniformly and spacedly fixed on the circumference of the positioning sheet.

Images