Zinc air battery system

Abstract

The invention relates to the technical field of zinc-air batteries, and provides a zinc-air battery system, comprising: an electric pile comprising a plurality of batteries connected in parallel, each battery being provided with a liquid outlet and a liquid inlet; the liquid separation mechanism comprises a liquid separation header pipe and a plurality of liquid separation branch pipes, the liquid inlet of each battery is connected with the corresponding liquid separation branch pipe, and the plurality of liquid separation branch pipes are connected to the liquid separation header pipe; the liquid collecting mechanism comprises a liquid collecting header pipe and a plurality of liquid collecting branch pipes, the liquid outlet of each battery is connected with the corresponding liquid collecting branch pipe, and the plurality of liquid collecting branch pipes are connected to the liquid collecting header pipe. Therefore, each battery is provided with an independent electrolyte flow channel, an electrolyte path can be physically isolated, concentration polarization in the electric pile is further reduced, the problem of leakage current of a series structure can be avoided, and the efficiency of the electric pile is optimized; the multiple batteries are connected in parallel, the consistency is good, the capacity of the electric pile can be flexibly set, maintenance is easy, and the requirement for long-time and high-stability cyclic charging and discharging energy storage can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of zinc-air batteries, and in particular to a zinc-air battery system. Background Art

[0002] Renewable energy, such as wind and solar energy, poses great challenges to the safe and stable operation of the existing power grid due to its volatility and intermittent characteristics. Therefore, additional energy storage devices are urgently needed to achieve dynamic supply and demand balance. Electrochemical energy storage uses large-scale battery charging and discharging to achieve regulation of renewable energy. Currently, all-vanadium liquid flow batteries and zinc-bromine batteries are widely used, but existing battery technology faces the disadvantages of high cost and poor safety.

[0003] Zinc-air battery is a battery technology with zinc as the negative electrode and oxygen as the positive electrode. It is low-cost and highly safe, and has broad application prospects in large-scale grid energy storage. In the field of zinc-air battery technology, the existing series architecture and common flow channel design have exposed many significant defects, which seriously restrict the overall performance and reliability of the battery system. The specific manifestations are as follows: In the series architecture of zinc-air batteries, the uneven zinc deposition of a single cell can easily cause voltage mismatch. This voltage mismatch not only leads to a decline in the performance of a single cell, but also further affects the efficiency of the entire battery system, reducing the overall energy conversion efficiency of the system. The common flow channel design has obvious deficiencies in electrolyte distribution, resulting in a gradient difference in electrolyte concentration between single cells. This concentration gradient difference will aggravate the polarization phenomenon inside the battery, thereby affecting the battery's charge and discharge performance and cycle life. In the common flow channel, due to the interaction between the electrolyte and the battery components, additional leakage current will be generated. This leakage current will not only lead to a decrease in Coulomb efficiency, but also significantly weaken the energy conversion efficiency of the battery, which seriously affects the overall performance of the battery system. The existing series architecture and common flow channel design make it difficult to perform online maintenance and replacement of a single battery when a fault occurs. This defect seriously restricts the scale and long-term operation reliability of the battery system, and increases the maintenance cost and downtime of the system. Summary of the invention

[0004] The invention provides a zinc-air battery system, which is used to solve the problem of poor operating reliability of zinc-air batteries in the prior art.

[0005] The present invention provides a zinc-air battery system, comprising: A battery stack, comprising a plurality of batteries connected in parallel, each of the batteries being provided with a liquid outlet and a liquid inlet; The liquid dispensing mechanism comprises a liquid dispensing main pipe and a plurality of liquid dispensing branch pipes, wherein the liquid inlet of each battery is connected to a corresponding liquid dispensing branch pipe, and the plurality of liquid dispensing branch pipes are connected to the liquid dispensing main pipe; The liquid collecting mechanism comprises a liquid collecting main pipe and a plurality of liquid collecting branch pipes. The liquid outlet of each battery is connected to a corresponding liquid collecting branch pipe, and the plurality of liquid collecting branch pipes are connected to the liquid collecting main pipe.

[0006] According to a zinc-air battery system provided by the present invention, the liquid separation mechanism also includes a plurality of liquid separation connection components, each of the liquid separation connection components includes a first elbow joint and a first direct joint, one end of each of the liquid separation branch pipes is connected to the corresponding liquid inlet of the battery through the corresponding first elbow joint, and the other end is connected to the liquid separation main pipe through the corresponding first direct joint.

[0007] According to a zinc-air battery system provided by the present invention, the liquid separation main pipe is provided with a plurality of liquid separation ports along its length direction, and each of the first direct connectors is connected to a corresponding liquid separation port.

[0008] According to a zinc-air battery system provided by the present invention, each of the liquid separation branch pipes is provided with a valve.

[0009] According to a zinc-air battery system provided by the present invention, the liquid separation main pipe includes a first end cover and at least one first tube body, and the first end cover is covered at one end of the first tube body.

[0010] According to a zinc-air battery system provided by the present invention, the liquid confluence mechanism also includes a plurality of liquid confluence connection assemblies, each of the liquid confluence connection assemblies includes a second elbow joint and a second direct joint, one end of each of the liquid confluence branch pipes is connected to the liquid outlet of the corresponding battery through the corresponding second elbow joint, and the other end is connected to the liquid confluence main pipe through the corresponding second direct joint.

[0011] According to a zinc-air battery system provided by the present invention, the liquid confluence main pipe is provided with a plurality of liquid confluence ports along its length direction, and each of the second direct connectors is connected to a corresponding liquid confluence port.

[0012] According to a zinc-air battery system provided by the present invention, the liquid collecting main pipe includes a second end cover and at least one second tube body, and the second end cover is covered at one end of the second tube body.

[0013] According to a zinc-air battery system provided by the present invention, the liquid outlet is located above the liquid inlet; and / or, Also included is a binding piece, through which a plurality of the batteries are connected together.

[0014] A zinc-air battery system provided by the present invention further includes: A liquid collecting box, wherein the liquid distribution main pipe and the liquid collection main pipe are both in fluid communication with the liquid collecting box.

[0015] In the zinc-air battery system provided by the present invention, the liquid inlet of each battery is connected to the liquid distribution main pipe through the corresponding liquid distribution branch pipe, and the liquid outlet of each battery is connected to the liquid collection main pipe through the corresponding liquid collection branch pipe. In this way, each battery has an independent electrolyte flow channel, which can physically isolate the electrolyte path, thereby reducing the concentration polarization inside the battery stack, avoiding the leakage current problem of the series structure, and optimizing the efficiency of the battery stack; by connecting multiple batteries in parallel, the consistency is good, the capacity of the battery stack can be flexibly set, the maintenance is simple, and the needs of long-term, high-stability cyclic charge and discharge energy storage can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the zinc-air battery system provided by the present invention.

[0018] Figure 2 This is the second structural schematic diagram of the zinc-air battery system provided by the present invention.

[0019] Figure 3 This is one of the explosion schematic diagrams of the zinc-air battery system provided by the present invention.

[0020] Figure 4 This is the second explosion schematic diagram of the zinc-air battery system provided by the present invention.

[0021] Figure 5 It is a structural schematic diagram of the liquid separation branch pipe provided by the present invention.

[0022] Figure 6 It is a structural schematic diagram of the liquid separation main pipe provided by the present invention.

[0023] Figure 7 It is a structural schematic diagram of the liquid collecting main pipe provided by the present invention.

[0024] Reference numerals: 1. Battery stack; 11. Battery; 111. Liquid inlet; 112. Liquid outlet; 2. Liquid separation mechanism; 21. Liquid separation main pipe; 211. First tube body; 212. First end cover; 213. Liquid separation port; 22. Liquid separation branch pipe; 221. Valve; 23. Liquid separation connection assembly; 231. First elbow joint; 232. First direct joint; 3. Liquid converging mechanism; 31. Liquid converging main pipe; 311. Second tube body; 312. Second end cover; 313. Liquid converging port; 32. Liquid converging branch pipe; 33. Liquid converging connection assembly; 331. Second elbow joint; 332. Second direct joint; 4. First current collector; 5. Second current collector; 6. Third current collector. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the zinc-air battery system of the embodiment of the present invention includes: a battery stack 1, a liquid separation mechanism 2 and a liquid collection mechanism 3. Among them, the battery stack 1 includes a plurality of batteries 11 connected in parallel, and each battery 11 is provided with a liquid outlet 112 and a liquid inlet 111. The liquid separation mechanism 2 includes a liquid separation main pipe 21 and a plurality of liquid separation branches 22, and the liquid inlet 111 of each battery 11 is connected to a corresponding liquid separation branch 22, and the plurality of liquid separation branches 22 are connected to the liquid separation main pipe 21; the liquid collection mechanism 3 includes a liquid collection main pipe 31 and a plurality of liquid collection branches 32, and the liquid outlet 112 of each battery 11 is connected to a corresponding liquid collection branch 32, and the plurality of liquid collection branches 32 are connected to the liquid collection main pipe 31.

[0027] It should be noted that the battery stack 1 includes a plurality of batteries 11 connected in parallel, each battery 11 having a first side and a second side arranged opposite to each other, wherein the first side is provided with a liquid inlet 111, and the second side is provided with a liquid outlet 112. In addition, the first side of each battery 11 is located in the same plane, and the second side of each battery 11 is also located in the same plane. In addition, each single battery 11 has a built-in three-electrode system consisting of a zinc negative electrode, a charging positive electrode, and a discharging positive electrode. Thus, the zinc-air battery system also includes a first current collector 4, a second current collector 5, and a third current collector 6. Specifically, the first current collector 4 is used to connect the zinc negative electrode of each battery 11, the second current collector 5 is used to connect the charging positive electrode of each battery 11, and the third current collector 6 is used to connect the discharging positive electrode of each battery 11.

[0028] In practical applications, the liquid dispensing mechanism 2 is used to distribute electrolyte to each battery 11. The liquid dispensing main pipe 21 is connected to the electrolyte source as an input pipe for the electrolyte, and each liquid dispensing branch pipe 22 is connected to the liquid inlet 111 of a battery 11 to ensure that each battery 11 can obtain an appropriate amount of electrolyte. Similarly, the liquid collecting mechanism 3 is used to collect the electrolyte flowing out from the liquid outlet 112 of each battery 11 for subsequent treatment or recycling. The liquid collecting main pipe 31 is used as an output pipe for the electrolyte and can also be connected to the electrolyte source. Each liquid collecting branch pipe 32 is connected to the liquid outlet 112 of a battery 11 to collect the outflowing electrolyte.

[0029] Specifically, the liquid inlet 111 of each battery 11 is connected to the liquid distribution main pipe 21 through the corresponding liquid distribution branch pipe 22, and the liquid outlet 112 of each battery 11 is connected to the liquid collection main pipe 31 through the corresponding liquid collection branch pipe 32. In this way, each battery 11 has an independent electrolyte flow channel, which can physically isolate the electrolyte path, thereby reducing the concentration polarization inside the battery stack 1, avoiding the leakage current problem of the series structure, and optimizing the efficiency of the battery stack 1; by connecting multiple batteries 11 in parallel, the consistency is good, the capacity of the battery stack 1 can be flexibly set, and maintenance is simple, which can meet the needs of long-term, high-stability cyclic charging and discharging energy storage.

[0030] It is understandable that the liquid branch pipe 22 can be made of a highly elastic and corrosion-resistant hose material, such as polyurethane (PU), polytetrafluoroethylene (PTFE) or polypropylene. These materials have good chemical corrosion resistance, high temperature resistance and wear resistance, and can maintain stable performance in an electrolyte environment for a long time. Similarly, the liquid converging branch pipe 32 can also be made of a highly elastic and corrosion-resistant hose material, such as polyurethane (PU), polytetrafluoroethylene (PTFE) or polypropylene. These materials have good chemical corrosion resistance, high temperature resistance and wear resistance, and can maintain stable performance in an electrolyte environment for a long time.

[0031] In order to achieve efficient distribution and stable flow of electrolyte, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the liquid separation mechanism 2 also includes a plurality of liquid separation connection components 23, each of which includes a first elbow joint 231 and a first direct joint 232, one end of each liquid separation branch pipe 22 is connected to the liquid inlet 111 of the corresponding battery 11 through the corresponding first elbow joint 231, and the other end is connected to the liquid separation main pipe 21 through the corresponding first direct joint 232.

[0032] It should be noted that the liquid separation mechanism 2 of the zinc-air battery system is responsible for distributing the electrolyte from the liquid separation main pipe 21 to each battery 11 as needed. Among them, the first elbow joint 231 is used to connect one end of the liquid separation branch pipe 22 and the liquid inlet 111 of the battery 11. The bending setting of the first elbow joint 231 makes the connection more flexible and can adapt to different spatial layouts. Exemplarily, the first elbow joint 231 is a right-angle joint. The first direct joint 232 is used to connect the other end of the liquid separation branch pipe 22 and the liquid separation main pipe 21. The first direct joint 232 simplifies the connection process and improves the stability and reliability of the connection.

[0033] Specifically, one end of each liquid distribution branch pipe 22 is tightly connected to the liquid inlet 111 of the corresponding battery 11 through the corresponding first elbow joint 231, ensuring that the electrolyte can smoothly flow into the battery 11. The other end of each liquid distribution branch pipe 22 is firmly connected to the liquid distribution main pipe 21 through the corresponding first direct joint 232, forming a complete electrolyte distribution channel.

[0034] It should be pointed out here that, according to the number and layout of the batteries 11, the liquid separation mechanism 2 is equipped with a corresponding number of liquid separation branches 22, and each liquid separation branch 22 works independently to ensure that each battery 11 can obtain an appropriate amount of electrolyte. Assuming that the zinc-air battery system includes 10 batteries 11, the liquid separation mechanism 2 will be equipped with 10 liquid separation branches 22 and a corresponding number of liquid separation connection components 23. The length and diameter of each liquid separation branch 22 are set according to the actual working conditions to ensure that the electrolyte can flow smoothly and meet the needs of the battery 11. Among them, a sealed connection is adopted between the liquid separation main pipe 21 and the liquid separation branch 22, and between the liquid separation branch 22 and the battery 11 to prevent electrolyte leakage and environmental pollution.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the liquid separation main pipe 21 is provided with a plurality of liquid separation ports 213 along its length direction, and each first direct connector 232 is connected to a corresponding liquid separation port 213 .

[0036] It should be noted that the main liquid separation pipe 21 is used as the main conveying pipe for the electrolyte. A plurality of liquid separation ports 213 are arranged along the length direction of the main liquid separation pipe 21. The liquid separation ports 213 can be evenly distributed to ensure that the electrolyte can be distributed to each battery 11. Each liquid separation port 213 is a connection point for introducing the electrolyte in the main liquid separation pipe 21 into the corresponding liquid separation branch pipe 22. The number and position of the liquid separation ports 213 are set according to the number and layout of the batteries 11 to achieve the best electrolyte distribution effect.

[0037] In practical applications, each first direct connector 232 is a connecting component, which is used to firmly connect one end of the liquid separation branch pipe 22 to the corresponding liquid separation port 213 on the liquid separation main pipe 21. Each first direct connector 232 can be tightly connected to the corresponding liquid separation port 213 by threaded connection, welding or other suitable connection methods. In this way, not only the smooth flow of the electrolyte is ensured, but also the leakage and contamination of the electrolyte are prevented.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, each liquid distribution branch pipe 22 is provided with a valve 221. In addition, each liquid collection branch pipe 32 can also be provided with a one-way valve.

[0039] The liquid distributing mechanism 2 is responsible for distributing the electrolyte to each battery 11, while the liquid collecting mechanism 3 is responsible for collecting the electrolyte flowing out of the battery 11. Specifically, a valve 221 is provided on each liquid distributing branch pipe 22 to control the flow of the electrolyte. The valve 221 can be a manual valve, a solenoid valve or other types of control valves, and the specific selection depends on the control requirements and operational convenience of the system.

[0040] It should be noted that by providing a valve 221 on the liquid distribution branch pipe 22, the electrolyte supply of each battery 11 can be independently controlled. For example, when maintaining or replacing the battery 11, the valve 221 of the corresponding liquid distribution branch pipe 22 can be closed to prevent the electrolyte from continuing to flow into the battery 11. In addition, the valve 221 can also be used to adjust the flow rate of the electrolyte to meet the different needs of the battery 11.

[0041] Furthermore, a one-way valve is provided on each liquid collecting branch pipe 32 to prevent electrolyte backflow. In this way, it is ensured that the electrolyte can only flow from the battery 11 to the liquid collecting main pipe 31, but not in the reverse direction. The provision of the one-way valve not only improves the safety of the system, but also prevents damage to the battery 11 or performance degradation caused by electrolyte backflow.

[0042] In actual applications, by setting the valve 221, the electrolyte supply and collection of each battery 11 can be independently controlled, thereby improving the reliability and stability of the system. The setting of the valve 221 makes the maintenance and management of the system more convenient. For example, when replacing the battery 11 or performing maintenance, the corresponding valve 221 can be conveniently closed to reduce the risk of electrolyte leakage and damage. By precisely controlling the flow and distribution of the electrolyte, the utilization rate of the electrolyte can be optimized, the system cost can be reduced, and the life of the battery 11 can be extended. In other words, the liquid distribution branch pipe 22 is equipped with an independent opening and closing valve 221, the replacement time of an abnormal single battery 11 is shortened, and the system availability, maintainability and reliability are simultaneously improved.

[0043] In order to support the dynamic expansion of the liquid distribution main pipe 21, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the liquid distribution main pipe 21 includes a first end cover 212 and at least one section of a first tube body 211 , and the first end cover 212 is disposed on one end of the first tube body 211 .

[0044] It should be noted that the main body of the liquid separation main pipe 21 is composed of at least one first tube body 211. Exemplarily, the liquid separation main pipe 21 includes two first tube bodies 211, which can be connected together by plugging. The first tube body 211 is the main channel for the flow of electrolyte, and its length and diameter are set according to the layout of the battery 11 system and the electrolyte flow demand.

[0045] In addition, the first end cap 212 can be tightly covered on one end of the first tube body 211 by welding, threaded connection or other suitable connection methods, thereby ensuring the sealing and stability of the liquid separation main pipe 21 and preventing leakage of the electrolyte and failure of the system.

[0046] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the liquid confluence mechanism 3 also includes a plurality of liquid confluence connection components 33, each of which includes a second elbow joint 331 and a second direct joint 332, one end of each liquid confluence branch pipe 32 is connected to the liquid outlet 112 of the corresponding battery 11 through the corresponding second elbow joint 331, and the other end is connected to the liquid confluence main pipe 31 through the corresponding second direct joint 332.

[0047] It should be noted that the liquid collection mechanism 3 of the zinc-air battery system is responsible for collecting the electrolyte flowing out of each battery 11. Among them, the second elbow joint 331 is used to connect one end of the liquid collection branch pipe 32 and the liquid outlet 112 of the battery 11. The bending setting of the second elbow joint 331 makes the connection more flexible and can adapt to different spatial layouts. Exemplarily, the second elbow joint 331 is a right-angle joint. The second direct joint 332 is used to connect the other end of the liquid collection branch pipe 32 and the liquid collection main pipe 31. The second direct joint 332 simplifies the connection process and improves the stability and reliability of the connection.

[0048] Specifically, one end of each liquid collecting branch pipe 32 is tightly connected to the liquid outlet 112 of the corresponding battery 11 through the corresponding second elbow joint 331, ensuring that the electrolyte can smoothly flow out of the battery 11. The other end of each liquid collecting branch pipe 32 is firmly connected to the liquid collecting main pipe 31 through the corresponding second direct joint 332, forming a complete electrolyte collection channel.

[0049] It should be pointed out here that, according to the number and layout of the batteries 11, the liquid confluence mechanism 3 is equipped with a corresponding number of liquid confluence branches 32, and each liquid confluence branch 32 works independently. Assuming that the zinc-air battery system contains 10 batteries 11, the liquid confluence mechanism 3 will be equipped with 10 liquid confluence branches 32 and a corresponding number of liquid confluence connection components 33. The length and diameter of each liquid confluence branch 32 are set according to the actual working conditions to ensure that the electrolyte can flow smoothly and meet the needs of the battery 11. Among them, the liquid confluence main pipe 31 and the liquid confluence branch 32, and the liquid confluence branch 32 and the battery 11 are sealed to prevent electrolyte leakage and environmental pollution.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the main liquid conduit 31 is provided with a plurality of conduit ports 313 along its length, and each second direct connector 332 is connected to a corresponding conduit port 313. It should be noted that the main liquid conduit 31 is provided with a plurality of conduit ports 313 along its length, so that the electrolyte of each battery 11 can be effectively collected through the corresponding conduit branch 32.

[0051] Each second direct connector 332 is tightly connected to the corresponding liquid confluence port 313, ensuring that the electrolyte can directly and efficiently enter the liquid confluence main pipe 31, reducing the risk of leakage and ensuring the sealing of the system. Each second direct connector 332 can be tightly connected to the corresponding liquid confluence port 313 by threaded connection, welding or other suitable connection methods.

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the liquid collecting main pipe 31 includes a second end cover 312 and at least one section of the second tube body 311 , and the second end cover 312 is covered at one end of the second tube body 311 .

[0053] It should be noted that the main body of the liquid conduit 31 is composed of at least one second tube body 311. Exemplarily, the liquid conduit 31 includes two second tube bodies 311, which can be connected together by plugging. The second tube body 311 is the main channel for the flow of electrolyte, and its length and diameter are set according to the layout of the battery 11 system and the electrolyte flow demand.

[0054] In addition, the second end cover 312 can be tightly covered on one end of the second tube body 311 by welding, threaded connection or other suitable connection methods, thereby ensuring the sealing and stability of the liquid main pipe 31 and preventing leakage of electrolyte and failure of the system.

[0055] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the liquid outlet 112 is located above the liquid inlet 111. It should be noted that there is a height difference between the liquid outlet 112 and the liquid inlet 111, and the height difference between the liquid outlet 112 and the liquid inlet 111 determines the capacity of the electrolyte in the battery 11. The height difference between the liquid outlet 112 and the liquid inlet 111 can be set according to actual needs and is not specifically limited here. Among them, the liquid distribution main pipe 21 is located above the liquid collection main pipe 31.

[0056] In an optional embodiment, the zinc-air battery system further includes a binding member, and the plurality of batteries 11 are connected together by the binding member. The binding member may be a cable tie. Specifically, the plurality of batteries 11 are connected together using the binding member to form a stable battery stack 1, which helps prevent the batteries 11 from moving or tilting during operation, thereby maintaining good contact between the batteries 11 and normal circulation of the electrolyte.

[0057] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the zinc-air battery system further includes a liquid collecting tank, and the liquid distribution main pipe 21 and the liquid collection main pipe 31 are both in fluid communication with the liquid collecting tank.

[0058] It should be noted that the liquid collecting box is used to collect and store electrolyte from the battery 11. The liquid collecting box usually has a large capacity to accommodate electrolyte from multiple batteries 11. In addition, the liquid collecting box is connected to the liquid distribution main pipe 21 and the liquid collection main pipe 31 through corresponding pipes to form a complete electrolyte circulation system. A pump body can be provided on the pipe.

[0059] The electrolyte of the embodiment of the present invention can be an aqueous solvent, which contains KOH and (CH 3 COO 2 The concentration of Zn, KOH is 6 mol / L, (CH 3 COO 2 The concentration of Zn is 0.2 mol / L.

[0060] In terms of performance testing, the battery stack 1 was subjected to 100 charge and discharge tests at a current density of 20mA / cm². After the test, the coulomb efficiency reached 83.5%, which was 5.5 percentage points higher than that of the traditional series battery stack, and the battery stack 1 did not have problems such as leakage during the entire test. In addition, the battery stack 1 was charged for 100 hours at a current density of 20mA / cm², and 0.8V was used as the discharge cut-off voltage. After the test, the energy efficiency was 73.5%, which was 9 percentage points higher than that of the traditional series battery stack. After testing, the leakage current ratio was less than 0.8%, which was 2.4 percentage points lower than that of the traditional series battery stack. In terms of maintenance convenience, it only takes five minutes to replace a single battery 11 in the embodiment of the present invention, while it takes thirty minutes to replace a single battery in the traditional series battery stack. The embodiment of the present invention saves 25 minutes.

[0061] In summary, the zinc-air battery system of the embodiment of the present invention has achieved a technological breakthrough in terms of performance improvement of the battery stack 1, leakage current suppression, maintenance convenience, and long-term operation stability, and provides a quantitatively verified solution for long-term energy storage scenarios.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A zinc-air battery system, characterized in that: include: A battery stack (1) comprising a plurality of batteries (11) connected in parallel, each of the batteries (11) being provided with a liquid outlet (112) and a liquid inlet (111); A liquid dispensing mechanism (2) comprising a liquid dispensing main pipe (21) and a plurality of liquid dispensing branch pipes (22), wherein the liquid inlet (111) of each battery (11) is connected to a corresponding liquid dispensing branch pipe (22), and the plurality of liquid dispensing branch pipes (22) are connected to the liquid dispensing main pipe (21); The liquid converging mechanism (3) comprises a liquid converging main pipe (31) and a plurality of liquid converging branch pipes (32), wherein the liquid outlet (112) of each battery (11) is connected to a corresponding liquid converging branch pipe (32), and the plurality of liquid converging branch pipes (32) are connected to the liquid converging main pipe (31).

2. The zinc-air battery system according to claim 1, characterized in that: The liquid separation mechanism (2) further comprises a plurality of liquid separation connection assemblies (23), each of the liquid separation connection assemblies (23) comprising a first elbow joint (231) and a first direct joint (232), one end of each of the liquid separation branch pipes (22) being connected to the liquid inlet (111) of the corresponding battery (11) via the corresponding first elbow joint (231), and the other end being connected to the liquid separation main pipe (21) via the corresponding first direct joint (232).

3. The zinc-air battery system according to claim 2, characterized in that: The liquid separation main pipe (21) is provided with a plurality of liquid separation ports (213) along its length direction, and each of the first direct connectors (232) is connected to a corresponding liquid separation port (213).

4. The zinc-air battery system according to claim 1, characterized in that: Each of the liquid separation branch pipes (22) is provided with a valve (221).

5. The zinc-air battery system according to claim 1, characterized in that: The liquid separation main pipe (21) comprises a first end cover (212) and at least one section of a first tube body (211); the first end cover (212) is provided on one end of the first tube body (211).

6. The zinc-air battery system according to claim 1, characterized in that: The liquid converging mechanism (3) further comprises a plurality of liquid converging connection assemblies (33), each of the liquid converging connection assemblies (33) comprising a second elbow joint (331) and a second direct joint (332), one end of each of the liquid converging branch pipes (32) being connected to the liquid outlet (112) of the corresponding battery (11) via the corresponding second elbow joint (331), and the other end being connected to the liquid converging main pipe (31) via the corresponding second direct joint (332).

7. The zinc-air battery system according to claim 6, characterized in that: The liquid collecting main pipe (31) is provided with a plurality of liquid collecting ports (313) along its length direction, and each of the second direct joints (332) is connected to a corresponding liquid collecting port (313).

8. The zinc-air battery system according to claim 1, characterized in that: The liquid collecting main pipe (31) comprises a second end cover (312) and at least one section of the second tube body (311), wherein the second end cover (312) is covered on one end of the second tube body (311).

9. The zinc-air battery system according to any one of claims 1 to 8, characterized in that: The liquid outlet (112) is located above the liquid inlet (111); and / or, It also includes a binding piece, through which a plurality of batteries (11) are connected together.

10. The zinc-air battery system according to any one of claims 1 to 8, characterized in that: Also includes: The liquid collecting box, the liquid distribution main pipe (21) and the liquid collection main pipe (31) are both in fluid communication with the liquid collecting box.

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