CN204303907U - Temperature control circulation fluid infusion zinc-oxygen battery system - Google Patents

Abstract

The utility model discloses a zinc-oxygen battery system for temperature-controlled cycle rehydration, which comprises a zinc-oxygen battery pack, an oxygen tank and a closed battery working compartment. The zinc-oxygen battery pack is located inside the closed battery working compartment. The single-cell zinc-oxygen battery is composed of an oxygen channel at the bottom and an electrolyte replenishment port at the top; the oxygen tank is located outside the sealed battery working compartment and connected to the sealed battery working compartment through a pipeline with a valve, and the sealed battery The working chamber is also provided with a circulating liquid replenishment device, a condensing pipe and a temperature control device connected thereto. The utility model has simple structure and reasonable design. The utility model adopts a high-temperature-resistant battery structure, a pure oxygen high-temperature working environment, and the design of the electrolyte cooling cycle replenishment system, so that the output power of the battery is increased by 5-10 times, and the output power of the battery can be guaranteed to meet the needs of the power battery and power. The usage standard of the battery makes the zinc-oxygen battery have a wider range of applications.

Description

Temperature-controlled circulation rehydration zinc-oxygen battery system

technical field

The utility model belongs to the field of battery control systems, and in particular relates to a zinc-oxygen battery system with temperature-controlled circulation and rehydration.

Background technique

Zinc-air batteries have attracted widespread attention because of their large capacity, high specific energy, stable working voltage, environmental protection, and cheap materials. It is easy to evaporate and lose in the open space, and the battery leakage is easy to corrode other external objects. The existing zinc-oxygen battery is in a pure oxygen environment, the temperature rises greatly after operation, and the materials used are all non-high temperature resistant materials. The battery materials will be deformed and invalidated due to high temperature, resulting in the battery not working properly. Therefore, a battery cooling system must be installed , but the battery will continue to lose electrolyte due to factors such as temperature rise, air cooling, and water cooling cycle. In the later stage of work, the battery will fail because it cannot work in the "rich liquid" state.

The traditional zinc-oxygen battery is composed of metal zinc, current collector, diaphragm paper, gas diffusion electrode (carbon electrode), plastic battery case, stainless steel oxygen chamber, insulating plastic tape and electrolyte. The gas diffusion electrode and metal zinc constitute the positive electrode of the battery respectively. And the negative electrode, and a matching stainless steel tank that provides an oxygen environment for the zinc-oxygen battery. How to install the battery: Assemble all parts of the battery, put them into a stainless steel tank filled with high-pressure oxygen, and then discharge after sealing. "Zinc Oxygen Battery Pack with Cooling Function" (Patent No. ZL2013101311304) introduces a device that uses coolant circulation to achieve cooling purposes. The defect of this device requires periodic cooling of the battery, so that the battery material that cannot withstand high temperatures can maintain normal working conditions , the battery will evaporate and take away part of the electrolyte during the heating process, and the battery will fail due to the electrolyte being evaporated at the end of the battery operation. The existing zinc-air battery technology uses oxygen in the air to participate in the reaction. The working environment of the battery is a semi-open system. If the electrolyte leaks, it will corrode other objects. If the moisture in the electrolyte is lost, this will inevitably lead to the loss of the electrolyte inside the battery, and the battery will also fail to work because the battery is in a "dry state" in the later stage of operation. The existing zinc-air battery technology is affected by factors such as operating temperature and oxygen concentration. Due to the limitation, the output power of the battery cannot meet the power standard of the existing power battery in the market, and it cannot be used as a power battery to independently supply power to power equipment.

Utility model content

The utility model aims at the problem that the power of the zinc-air power battery is insufficient. Because the working environment of the battery is a semi-open system, the electrolyte in the battery is easy to evaporate and lose, and the electrolyte leaks and corrodes other objects. The positive electrode reactant of the battery, that is, the oxygen in the air Replace the pure oxygen in the oxygen tank, design the liquid condensation cycle replenishment system in the airtight working chamber, and then use the experimental conclusion that the discharge power of the zinc-oxygen battery will be significantly improved in the high temperature working environment, and propose a temperature control cycle Rehydration zinc-oxygen battery system.

The technical scheme adopted in the utility model is as follows:

A temperature-controlled circulation rehydration zinc-oxygen battery system, including a zinc-oxygen battery pack, an oxygen tank, and a closed battery working compartment, characterized in that: the zinc-oxygen battery pack is located inside the sealed battery working compartment, and the zinc-oxygen battery pack is composed of multiple The single-cell zinc-oxygen battery is composed of an oxygen channel at the bottom of the single-cell zinc-oxygen battery and an electrolyte replenishment port at the top; the oxygen tank is located outside the working chamber of the sealed battery and connected to the sealed battery through a pipeline with a valve. On the working compartment, the airtight battery working compartment is also equipped with a circulating liquid replenishment device, which is symmetrically distributed on both sides of the zinc-oxygen battery pack, including a circulating liquid replenishing pipeline connected by pipelines, a liquid suction pump, and a liquid replenishing storage tank and a plurality of liquid replenishment branch pipes, the plurality of liquid replenishment branch pipes are respectively connected to the electrolyte liquid replenishment port of a single-cell zinc-oxygen battery, and a liquid flow control valve is arranged on it; a condensation pipe and a temperature control device connected thereto are also provided. The condensation pipes are symmetrically distributed on both sides of the zinc-oxygen battery pack, and are located between the connecting pipes of the circulation replenishment device to form a condensation space. The bottom of the condensation space is provided with a condensate collection chamber, and the circulation replenishment pipe is connected to the condensate collection chamber; The volatile water vapor of the zinc-oxygen battery pack electrolyte falls into the condensate collection chamber along the condensation pipe after being condensed in the condensation space, and the liquid suction pump sucks the liquid from the condensate collection chamber to the rehydration storage through the circulating replenishment pipe. When the liquid flow control valve is opened, the liquid enters the sealed battery tank of the single-cell zinc-oxygen battery.

The zinc-oxygen single cell includes a stainless steel case, the stainless steel case is provided with a ceramic lower frame inside, and a carbon electrode is provided at the bottom, the carbon electrode and the stainless steel case form the positive electrode of the battery, and the two ends of the carbon electrode are sealed and glued On the ceramic lower frame, ceramic fiber diaphragm paper is arranged above it, so that a sealed airtight chamber is formed between the carbon electrode and the bottom of the stainless steel shell, and the airtight chamber is provided with channels for oxygen and circulating liquid replenishment; The interior of the ceramic fiber diaphragm paper includes a zinc cake, the zinc cake is provided with a zinc current collector tab, and the zinc cake and the zinc current collector tab form the negative electrode of the battery, and also includes a ceramic upper cover. The cover and the cover are combined in the ceramic lower frame to form a battery tank, the battery tank is filled with electrolyte, the ceramic upper cover is also provided with an opening and a liquid replenishment port, and the zinc current collector tab passes through the opening. When a single-cell zinc battery forms a zinc battery pack, the zinc current collector of the next zinc-oxygen battery is matched with the stainless steel case of the previous battery, and all single-cell zinc batteries are stacked up and down and fixed by a fixing device to form a zinc battery pack. For an oxygen battery pack, the fixing device is a splint or a screw.

The liquid replenishment reservoir is filled with electrolyte.

The valve controls the concentration of oxygen fed into the working chamber of the battery, and further controls the reaction rate of the battery to a certain extent, and adjusts the discharge power.

The beneficial effects of the utility model are reflected in:

The electrolyte of the utility model can achieve a cycle inside, and the battery is always working in a state of rich liquid to improve the utilization rate of zinc inside the battery; the materials used in the battery are all high-temperature-resistant ceramic materials, and there is no need to consider the impact of the battery on the battery due to excessive temperature rise. performance, and there is no need to set up a battery cooling system, which reduces the cost of using the battery; the battery works in a closed working compartment, and there is no problem of electrolyte leakage and corrosion of other external objects, which is safer and more reliable, and has a wider application range; the heat of the battery It cannot be lost quickly, ensuring that the battery is always working at a relatively high temperature, which is in line with the best temperature for laboratory battery work; the high temperature resistant battery structure, the high temperature working environment of pure oxygen, and the design of the electrolyte cooling circulation replenishment system make the battery output The power is increased by 5-10 times to ensure that the output power of the battery can meet the needs of the power battery and meet the use standards of the power battery, making the zinc-oxygen battery more widely used.

Description of drawings

Fig. 1 is the structure schematic diagram of the utility model zinc-oxygen single cell;

In the figure: 1—plastic upper cover; 2—plastic lower cover; 3—stainless steel shell; 4—diaphragm paper; 5—carbon electrode; 6—oxygen channel; 7—zinc current collector; 8—zinc cake; 9—electrolyte ; 10—replenishment port;

Fig. 2 is the structural representation of the utility model;

In the figure: 10—replenishment port; 11—valve; 12—condenser pipe; 13—liquid flow control valve; 14—temperature control device; 15—liquid suction pump; 16—replenishment reservoir; 17—zinc-oxygen battery pack; 18—Condensate collection chamber; 19—Cycle rehydration pipeline; 20—Rehydration branch pipe; 21—Oxygen tank; 22—Sealed battery working compartment.

Detailed ways

The present embodiment will be further introduced below in conjunction with FIG. 2 .

A temperature-controlled circulation rehydration zinc-oxygen battery system, including a zinc-oxygen battery pack 17, an oxygen tank 21, and a sealed battery working compartment 22, the zinc-oxygen battery pack 17 is located inside the sealed battery working compartment 22, and the zinc-oxygen battery pack 17 It consists of a plurality of single-cell zinc-oxygen batteries. The bottom of the single-cell zinc-oxygen battery is provided with an oxygen channel 6, and the top is provided with an electrolyte replenishment port 10; the oxygen tank 21 is located outside the sealed battery working compartment 22 and is provided with a valve The pipeline of 11 is connected to the airtight battery work compartment 22, and the airtight battery work compartment 22 is also equipped with a circulating liquid replenishment device, which is symmetrically distributed on both sides of the zinc-oxygen battery group 17, including the circulating liquid replenishment connected by pipelines in sequence Pipeline 19, liquid suction pump 15, rehydration storage tank 16, and a plurality of rehydration branch pipes 20, the plurality of rehydration branch pipes 20 are respectively connected to the electrolyte rehydration port 10 of a single zinc-oxygen battery, and a liquid flow control valve is arranged on it 13; There is also a condensation pipe 12 and a temperature control device 14 connected thereto. The condensation pipe 12 is symmetrically distributed on both sides of the zinc-oxygen battery pack 17, and is located between the connecting pipes of the circulating liquid replenishment device to form a condensation space. The condensation space A condensate collection chamber 18 is provided at the bottom of the bottom, and the circulating replenishment pipe 19 is connected to the condensate collection chamber 18; the volatile water vapor of the electrolyte of the zinc-oxygen battery pack 17 falls into the condensate along the condensation pipe 12 after being condensed in the condensation space The collection chamber 18, the liquid suction pump 15 sucks the liquid from the condensate collection chamber 18 to the liquid replenishment storage tank 16 through the circulating replenishment pipe 19, when the liquid flow control valve 13 is opened, the liquid enters the seal of the single-cell zinc-oxygen battery in the battery slot. Filled with liquid in the described rehydration reservoir 16

As shown in Figure 1, it is a structural schematic diagram of the zinc-oxygen single cell of the present invention; the zinc-oxygen single cell includes a stainless steel shell 3, and the inside of the stainless steel shell 3 is provided with a ceramic lower frame 2, and the bottom is provided with a carbon electrode 5, so The positive pole of the battery is composed of the carbon electrode 5 and the stainless steel shell 3, and the two ends of the carbon electrode 5 are glued to the ceramic lower frame 2, and a ceramic fiber diaphragm paper 4 is arranged above it, so that the carbon electrode 5 and the A sealed airtight chamber is formed between the bottoms of the stainless steel shells 3, and an oxygen and circulating liquid supplement channel 6 is opened on the airtight chamber; the inside of the ceramic fiber diaphragm paper 4 includes a zinc cake 8, and the zinc cake 8 is provided with There is a zinc current collector (power) tab 7, the zinc cake 8 and the zinc current collector tab 7 form the negative electrode of the battery, and also includes a ceramic upper cover 1, and the ceramic upper cover 1 and the cover are closed in the ceramic lower frame 2 A battery tank is formed, the battery tank is filled with electrolyte solution 9, the ceramic upper cover 1 is also provided with an opening and a liquid replenishment port 10, and the zinc current collector tab 7 passes through the opening, when a single zinc battery is composed In the case of a zinc battery pack, the zinc current collector 7 of the next zinc-oxygen battery is matched with the stainless steel case 3 of the previous battery, and all single zinc batteries are stacked up and down and fixed by a fixing device to form a zinc-oxygen battery pack 17. The fixing device is a splint or a screw.

When the utility model is working, the valve 11 is opened to control the oxygen concentration in the working chamber of the battery through the valve 11, and then control the reaction rate of the battery to a certain extent and adjust the discharge power. After working for a period of time, the temperature in the entire battery working chamber rises, the water in the electrolyte evaporates, and the water vapor condenses into liquid droplets after meeting the condensation pipe 12, and flows into the condensate collection chamber 18 along the wall of the condensation pipe, and the collected liquid reaches a certain level. After volume, the volatile water vapor of the electrolyte of the zinc-oxygen battery pack 17 condenses in the condensation space and falls into the condensate collection chamber 18 along the condensation pipe 12. The collection chamber 18 sucks the liquid into the rehydration reservoir 16, and the flow control valve 13 is opened for a period of time at the designated time node for rehydration, and the liquid enters the sealed battery tank of the single-cell zinc-oxygen battery. The temperature control device 14 always controls the temperature in the circulation system at a position between 50°C and 80°C.

Claims (4)

1. a temperature control circulation fluid infusion zinc-oxygen battery system, comprise zinc-oxygen battery group, oxygen tank and enclosed cell working bin, it is characterized in that: it is inner that described zinc-oxygen battery group is positioned at enclosed cell working bin, described zinc-oxygen battery group is made up of multiple single-unit zinc-oxygen battery, offer oxygen channel bottom described single-unit zinc-oxygen battery, top is provided with electrolyte fluid infusion mouth, it is outside and by establishing valvular pipeline to be connected on enclosed cell working bin that described oxygen tank is positioned at enclosed cell working bin, described enclosed cell working bin is also provided with circulation liquid supply device, described circulation liquid supply device is symmetrically distributed in zinc-oxygen battery group both sides, comprise the circulation liquid supplementation channel of pipeline connection successively, liquid suction pump, fluid infusion reservoir and multiple fluid infusion arm, described multiple fluid infusion arm accesses the electrolyte fluid infusion mouth of single-unit zinc-oxygen battery respectively, which is provided with liquid flow control valve, the attemperating unit being also provided with condenser pipe and being attached thereto, described condenser pipe is symmetrically distributed in zinc-oxygen battery group both sides, condensation space is formed between circulation liquid supply device connecting tube, the bottom of described condensation space is provided with collection chamber receiving condensate, described circulation liquid supplementation channel is connected to collection chamber receiving condensate, described zinc-oxygen battery group electrolyte volatilization steam falls into collection chamber receiving condensate along condenser pipe after condensation space condensation, described liquid suction pump by described circulation liquid supplementation channel from collection chamber receiving condensate's pumping liquid to fluid infusion reservoir, when opening liquid flow control valve, liquid enters in the sealed cell groove of single-unit zinc-oxygen battery.

2. a kind of temperature control circulation fluid infusion zinc-oxygen battery system according to claim 1, it is characterized in that: described zinc oxygen monocell comprises stainless steel case, described stainless steel case inside is provided with ceramic lower frame, bottom is provided with carbon electrode, the positive pole of described carbon electrode and stainless steel case composition battery, described carbon electrode two ends fluid sealant is bonded on ceramic lower frame, ceramic fibre diaphragm paper is provided with above it, form a gas-tight silo sealed between making bottom described carbon electrode and described stainless steel case, described gas-tight silo offers oxygen channel, described ceramic fibre diaphragm paper inside includes zinc cake, described zinc cake is provided with collector and lug, the negative pole of described zinc cake and zinc afflux ear composition battery, also comprise ceramic upper cover, described ceramic upper cover forms battery case with covering in ceramic lower frame, electrolyte is filled with in described battery case, described ceramic upper cover is also provided with opening and fluid infusion mouth, described zinc afflux ear passes from opening, when single-unit zinc battery composition zinc battery group, next joint zinc collector of zinc-oxygen battery described and the stainless steel case of a upper batteries are combined together, all single-unit zinc battery mounted on top are also fixed by fixture, composition zinc-oxygen battery group.

3. a kind of temperature control circulation fluid infusion zinc-oxygen battery system according to claim 2, is characterized in that: described fixture is clamping plate or screw.

4. a kind of temperature control circulation fluid infusion zinc-oxygen battery system according to claim 1, is characterized in that: be filled with liquid in described fluid infusion reservoir.