An overlapping structure for a zinc-air battery power bank

Abstract

This utility model discloses an overlapping structure for a zinc-air battery power bank, relating to the technical field of zinc-air battery power banks. The utility model includes a ventilated outer shell, within which a battery cell assembly is installed. The battery cell assembly comprises two overlapping battery cell units, each having a positive electrode contact surface that contacts the inner wall of the ventilated outer shell. The two positive electrode contact surfaces of the battery cell assembly respectively contact the upper and lower side walls of the ventilated outer shell, allowing external air to communicate with the positive electrode contact surfaces through the ventilated outer shell. This utility model, through the overlapping arrangement of the battery cell units, ensures that the air positive electrode is in close contact with the inner wall of the ventilated outer shell. Without increasing the overall external dimensions of the product, it significantly increases the effective area of ​​the zinc-air battery positive electrode. The larger air positive electrode contact area promotes more oxygen participation in the electrochemical reaction, improving charging power. Simultaneously, this compact layout further reduces the internal space occupied by the product, better balancing portability.

Description

Technical Field

[0001] This utility model belongs to the technical field of zinc-air battery power banks, and specifically relates to an overlapping structure for zinc-air battery power banks. Background Technology

[0002] A zinc-air battery power bank is a charging device that uses zinc-air batteries as an energy source. Zinc-air batteries are a hybrid of rechargeable and fuel cell technology, characterized by low cost, high energy output, and high safety. Their working principle involves using oxygen from the air as the positive electrode active material and metallic zinc as the negative electrode active material, generating electrical energy through an electrochemical reaction. The advantages of zinc-air batteries include high energy density, environmental friendliness, and high safety performance.

[0003] In the current power bank market, zinc-air battery power banks have attracted attention due to their unique performance advantages. In actual use, users expect the charging power to be as high as possible. For zinc-air battery power banks, the charging current is closely related to the size of the positive electrode of the zinc-air battery. That is, the larger the positive electrode size, the larger the charging current, and thus the higher the charging power. However, since the overall size of the power bank needs to meet the portability requirements, under the premise of fixed size, how to increase the area of ​​the positive electrode of the zinc-air battery has become a key problem to improve charging performance. Meanwhile, the double-layer, flexible zinc-air battery power bank performs well in terms of size, cost, and charging current, and has good market application potential. However, during product carrying, the connection between the two batteries is prone to bending. Frequent bending not only affects the appearance of the power bank, but may also cause problems such as damage to internal circuits and loose battery connections, reducing the product's lifespan and safety, and seriously affecting the user experience. Utility Model Content

[0004] To address the technical issues of increasing the positive electrode area of ​​zinc-air battery to improve charging power within a fixed outer shell size and the easy bending of soft-pack zinc-air battery power banks, this utility model provides an overlapping structure for zinc-air battery power banks, including a ventilated outer shell, with a battery cell assembly installed inside the ventilated outer shell cavity. The battery pack includes two overlapping battery cells, each having a positive electrode contact surface that contacts the inner wall of the ventilated housing. The two positive electrode contact surfaces of the battery pack are respectively in contact with the upper and lower side walls of the ventilated housing to allow external air to communicate with the positive electrode contact surfaces through the ventilated housing.

[0005] At least two sets of battery cells are arranged inside the ventilated outer shell and are arranged laterally along the length of the ventilated outer shell. Each battery cell includes a battery frame.

[0006] The battery cell unit is arranged from top to bottom as follows: battery frame, air positive electrode, separator, zinc negative electrode, negative electrode current collector, and battery cover. The air positive electrode is the positive electrode contact surface.

[0007] The adjacent edges of the battery frames of the two battery cell packs overlap.

[0008] The adjacent edges of the two battery frames are glued and overlapped.

[0009] The battery frame edge of one cell group overlaps and is positioned above the battery frame edge of another cell group.

[0010] The edges of the two battery frames of one cell group overlap and are staggered with the edges of the two battery frames of another cell group.

[0011] The battery frame and battery cover are fixed together on all four sides to form an internal space. The air positive electrode, separator, zinc negative electrode, and negative electrode current collector are all located in the internal space formed by the battery frame and battery cover, and the contact area of ​​the air positive electrode can contact the inner wall of the ventilated outer shell.

[0012] The breathable outer shell is made of breathable mesh fabric.

[0013] A transmission cable is installed at one end of the ventilated outer shell, and all battery cells are connected to the transmission cable. A transmission plug is installed at one end of the transmission cable.

[0014] This utility model has the following beneficial effects: 1. This utility model, through the overlapping arrangement of battery cell units, ensures that the air positive electrode is in close contact with the inner wall of the breathable outer shell. Without increasing the overall external size of the product, it significantly increases the effective area of ​​the zinc-air battery positive electrode. The larger contact area of ​​the air positive electrode promotes more oxygen to participate in the electrochemical reaction, increases the charging current, and thus improves the charging power. At the same time, this compact layout further reduces the internal space occupied by the product, allowing the power bank to better meet the high power requirements while better taking into account portability, achieving a dual optimization of size and performance.

[0015] 2. This utility model greatly enhances the structural strength of the power bank by bonding and overlapping adjacent battery frames in the battery cell assembly. When the power bank is subjected to external forces such as squeezing or bending, the overlapping and bonding parts can effectively disperse the stress, avoid stress concentration that could cause the product to bend, and further reduce the size of the product, thus improving portability.

[0016] 3. This utility model further ensures the stability of the internal structure of the battery cell by fixing the battery frame and battery cover on all four sides, reducing the risk of damage to internal circuits and loose battery connections, extending the product's service life, and improving safety and reliability during use.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional exploded structure diagram of the present invention; Figure 3 This is a schematic diagram of the battery cell unit of this utility model; Figure 4 This is a schematic diagram of the overlapping arrangement of the battery cells of this utility model; Figure 5 This is the second schematic diagram of the overlapping arrangement of the battery cells of this utility model.

[0019] Explanation of reference numerals in the attached diagram: 1. Ventilated outer shell; 2. Cell assembly; 21. Cell unit; 211. Battery frame; 212. Air positive electrode; 213. Separator; 214. Zinc negative electrode; 215. Negative electrode current collector; 216. Battery cover; 3. Transmission cable; 4. Transmission plug. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices of the embodiments of this utility model. Figure 1-5 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0021] Please see Figure 1 , Figure 2 As shown: This embodiment provides a zinc-air battery power bank overlapping structure, including a ventilated outer shell 1, and a battery cell assembly 2 installed in the inner cavity of the ventilated outer shell 1; The battery cell assembly 2 includes two overlapping battery cell units 21. Each battery cell unit 21 has a positive electrode contact surface that contacts the inner wall of the ventilated housing 1. The two positive electrode contact surfaces of the battery cell assembly 2 are respectively in contact with the upper and lower side walls of the ventilated housing 1 to allow external air to communicate with the positive electrode contact surface through the ventilated housing 1.

[0022] The breathable mesh material of the breathable outer shell 1 has a large number of tiny pores, which creates a channel for external air to enter the power bank. The two positive electrode contact surfaces of the battery cell group 2 are in close contact with the upper and lower side walls of the breathable outer shell 1, respectively, to build a direct communication path between the air and the positive electrode. By overlapping the two battery cell units 21, the total area of ​​the positive electrode can be effectively expanded without changing the overall external size of the power bank. A larger positive electrode area means that more oxygen can participate in the electrochemical reaction, which promotes a more complete reduction reaction and thus significantly increases the charging current of the battery. The increase in charging current directly drives the increase in charging power, greatly shortens the charging time of electronic devices, and meets the user's urgent need for fast charging.

[0023] like Figures 1-3 As shown, at least two sets of battery cells 2 are arranged inside the ventilated outer shell 1 and are arranged laterally along the length of the ventilated outer shell 1. The adjacent edges of the battery frames 211 of the two battery cells 2 overlap and are bonded together. During the carrying and use of the power bank, it will inevitably be subjected to external forces such as squeezing and bending. By making the adjacent edges of the battery frames 211 overlap and bonded together, the overlapping part and the bonding point share the stress when subjected to external forces, which further enhances the bending resistance of the entire battery cell 2, improves the durability and safety of the product, and also allows the size of the product to be further reduced, improving portability. There are two implementation methods for the overlapping of battery cell pack 2. Implementation method 1: (Refer to...) Figure 4 The edge of the battery frame 211 of one cell group 2 overlaps and is disposed above the edge of the battery frame 211 of another cell group 2; Embodiment 2: Reference Figure 5 The edges of the two battery frames 211 of one battery cell group 2 overlap and are staggered with the edges of the two battery frames 211 of another battery cell group 2. Both overlapping arrangements can improve the structural stability of the connection part of the battery cell group 2 and enhance the bending resistance of the structure.

[0024] like Figures 1-3As shown, the battery cell unit 21 is arranged from top to bottom as follows: battery frame 211, air positive electrode 212, separator 213, zinc negative electrode 214, negative electrode current collector 215, and battery cover 216. The air positive electrode 212 is the positive electrode contact surface. The battery frame 211 and battery cover 216 are fixed on all four sides to form an internal space. The air positive electrode 212, separator 213, zinc negative electrode 214, and negative electrode current collector 215 are all arranged in the internal space formed by the battery frame 211 and battery cover 216. The contact area of ​​the air positive electrode 212 can contact the inner wall of the ventilated outer shell 1. During the electrochemical reaction, the zinc negative electrode 214 undergoes an oxidation reaction, and zinc atoms lose electrons to become zinc ions and enter the electrolyte. Electrons flow to the air positive electrode through the external circuit. 212, while zinc ions diffuse through the separator 213 to the air positive electrode 212 side. At the air positive electrode 212, oxygen enters from the permeable shell 1 and gains electrons under the catalytic action of the air positive electrode 212, reacting with water in the electrolyte to generate hydroxide ions. The negative electrode current collector 215 collects the electrons generated by the zinc negative electrode 214 and conducts them to the transmission cable 3 through the internal circuit. The function of the separator 213 is to prevent the zinc negative electrode 214 and the air positive electrode 212 from directly contacting each other to avoid short circuits, while allowing ions to pass through to ensure the normal progress of the electrochemical reaction. The battery frame 211 and the battery cover 216 not only provide physical support and protection for the internal components, but also maintain a stable environment inside the cell to ensure that the electrochemical reaction takes place under suitable conditions.

[0025] like Figure 1 As shown, the breathable outer shell 1 is made of breathable mesh fabric. This material has good breathability, allowing a large amount of oxygen to smoothly enter the power bank. The sufficient oxygen supply provides favorable conditions for the reduction reaction of the positive air electrode 212, thereby improving the efficiency of the electrochemical reaction.

[0026] like Figure 1 As shown, a transmission cable 3 is installed at one end of the ventilated shell 1. All battery cells 21 are connected to the transmission cable 3. A transmission plug 4 is installed at one end of the transmission cable. The electrical energy generated by the battery cells 21 through the electrochemical reaction is transmitted to the transmission cable 3 and then to the transmission plug 4. Users can use the transmission plug 4 for charging. The transmission plug 4 can be one of a type-C, Android, or Apple connector, which is suitable for a variety of products and improves practicality.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A zinc-air battery power bank overlapping structure comprising a gas-permeable outer shell (1), characterized in that, The inner cavity of the ventilated outer shell (1) is equipped with a battery cell assembly (2); The battery cell assembly (2) includes two overlapping battery cell units (21), each battery cell unit (21) having a positive electrode contact surface that contacts the inner wall of the ventilated outer shell (1); the two positive electrode contact surfaces of the battery cell assembly are respectively in contact with the upper and lower side walls of the ventilated outer shell (1) to allow external air to communicate with the positive electrode contact surface through the ventilated outer shell (1).

2. The zinc-air battery power bank overlapping structure of claim 1, wherein, At least two sets of battery cell groups (2) are arranged inside the ventilated outer shell (1) and are arranged laterally along the length direction of the ventilated outer shell (1). The battery cell group (2) includes a battery frame (211).

3. The zinc-air battery power bank overlapping structure of claim 2, wherein, The battery cell unit (21) is arranged from top to bottom as a battery frame (211), an air positive electrode (212), a separator (213), a zinc negative electrode (214), a negative electrode current collector (215), and a battery cover (216). The air positive electrode (212) is the positive electrode contact surface.

4. The zinc-air battery power bank overlapping structure of claim 2, wherein, The adjacent edges of the battery frames (211) of the two battery cell groups (2) overlap.

5. The zinc-air battery power bank overlapping structure of claim 4, wherein, The adjacent edges of the two battery frames (211) are bonded and overlapped.

6. The zinc-air battery power bank overlapping structure of claim 5, wherein, The edge of the battery frame (211) of one of the battery cells (2) overlaps and is disposed above the edge of the battery frame (211) of another battery cell (2).

7. The zinc-air battery power bank overlapping structure of claim 5, wherein, The edges of two battery frames (211) of one battery cell group (2) overlap and are staggered with the edges of two battery frames (211) of another battery cell group (2).

8. The zinc-air battery power bank overlapping structure of claim 3, wherein, The battery frame (211) and the battery cover (216) are fixed together on all four sides to form an internal space. The air positive electrode (212), the separator (213), the zinc negative electrode (214), and the negative electrode current collector (215) are all arranged in the internal space formed by the battery frame (211) and the battery cover (216), and the contact area of ​​the air positive electrode (212) can contact the inner wall of the ventilated outer shell (1).

9. The zinc-air battery power bank overlapping structure of claim 1, wherein, The breathable outer shell (1) is made of breathable mesh fabric.

10. The zinc-air battery power bank overlapping structure of claim 1, wherein, One end of the breathable outer shell (1) is equipped with a transmission cable (3), and the battery cell unit (21) is connected to the transmission cable (3). One end of the transmission cable (3) is equipped with a transmission plug (4).

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