A soft package battery with a support capable of increasing liquid retention, a soft package battery with a double-sided monopolar plate, and a soft package battery with a single-sided bipolar plate

Abstract

The utility model relates to the field of battery, disclose a kind of soft package battery of improving liquid reserve amount support, double-sided monopolar sheet, and the soft package battery of single-sided bipolar sheet, including the welding site front and rear two sides of electrode sheet and the sub-bracket and main support of electric core, the main support and the sub-bracket both ends are docked by occlusion, the welding site position between the main support and the sub-bracket forms cavity;Beneficial effect lies in: by setting the storage space of electrolyte of improving liquid reserve amount support is increased, after the loss caused by electrolytic loss, the pressure in the inside of electric core reduces, the electrolyte in the cavity of improving liquid reserve amount support flows into electric core by siphon, to ensure that the electrolyte in the cavity of improving liquid reserve amount support continuously flows to electric core when the continuous loss of electric core, to improve the service life of battery, overall simple and effective, convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically a soft-pack battery with a support for improving liquid retention, double-sided monopolar plates, and a soft-pack battery with a single-sided bipolar plate. Background Technology

[0002] A storage battery is a device that converts chemical energy into electrical energy, and it is rechargeable and reusable. It mainly consists of positive and negative plates, separators, electrolyte, and a battery case. With technological advancements and the vigorous development of new energy sources, the application scenarios for storage batteries are becoming increasingly widespread.

[0003] During battery use, the electrolyte will be depleted due to the following reasons, thus affecting the battery's lifespan: I. Battery Side Reactions: During battery cycling, especially under high-temperature conditions, side reactions may occur at the electrode material interface of the electrolyte, such as electrolyte decomposition and reaction with the electrode material. These side reactions release gases and lead to electrolyte loss. For example, during cycling at 55°C, the electrolyte may undergo side reactions at the electrode material interface, releasing a large amount of gas, which is one of the important reasons for battery capacity decay. 2. Electrolyte Evaporation: Batteries generate heat during operation, causing the water in the electrolyte to evaporate, thus reducing the electrolyte volume. Electrolyte evaporation not only leads to a drop in battery voltage but also severely impacts battery lifespan.

[0004] Therefore, the amount of electrolyte inside the battery and timely replenishment are crucial to the battery's durability and efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a support bracket that increases the liquid retention capacity of a battery, addressing the aforementioned issues that are crucial to the battery's durability and efficiency, particularly regarding the liquid level and timely replenishment.

[0006] The technical solution adopted by this utility model is as follows: a liquid retention capacity support includes a secondary support and a main support disposed at the end of the battery cell. The two ends of the main support and the secondary support are connected by an interlocking method. The gap between the main support and the secondary support at the middle position forms a cavity after the soft outer shell is wrapped.

[0007] Preferably, the main support has grooves at both ends, and the secondary support has protrusions at both ends corresponding to the shape of the grooves.

[0008] Preferably, the sub-support is located in front of the welding position between the electrode sheet and the battery cell, and the main support is located behind the welding position between the electrode sheet and the battery cell.

[0009] A pouch battery with dual-sided single-electrode plates utilizes the aforementioned liquid retention enhancement bracket. The pouch battery includes a cell and electrode plates, each electrode plate comprising a positive electrode plate and a negative electrode plate. The positive electrode plate is disposed at the upper end of the cell, and the negative electrode plate is disposed at the lower end of the cell. A positive electrode sealing ring is fitted onto the positive electrode plate, and a negative electrode sealing ring is fitted onto the negative electrode plate. The positive electrode plate and the cell are welded together at their respective welding positions. The liquid retention enhancement bracket consists of two sets, each fitted onto the corresponding welding positions of the positive and negative electrode plates.

[0010] A single-sided bipolar pouch battery using the aforementioned liquid retention enhancement bracket, the pouch battery includes a cell and electrode plates, the electrode plates including a positive electrode plate and a negative electrode plate, both of which are disposed on the upper end of the cell; a positive electrode sealing ring is fitted on the positive electrode plate, and a negative electrode sealing ring is fitted on the negative electrode plate; the positive electrode plate and the cell are welded together at the welding position, and the negative electrode plate and the cell are welded together at the welding position; the liquid retention enhancement bracket is a set and is fitted on the corresponding welding positions of the positive and negative electrode plates.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: By setting up an electrolyte retention bracket to increase the storage space for electrolyte, the internal pressure of the battery cell decreases after electrolyte loss. The electrolyte in the cavity of the electrolyte retention bracket flows into the battery cell through siphon, thus ensuring that the electrolyte in the cavity of the electrolyte retention bracket continues to flow to the battery cell even when the battery cell is continuously losing electrolyte, thereby improving the battery's lifespan. The whole process is simple, effective, and easy to operate.

[0012] In this invention, the main outer shell provides space for the chemical reaction of the battery. After the spare bladder is filled, the corresponding slots of the auxiliary support and the main support are fixed together by deformation to clamp the compression frame and squeeze the spare bladder, thereby isolating the space between the main outer shell and the spare bladder. After leakage due to electrolytic loss, the internal pressure of the main outer shell decreases, and the electrolyte in the spare bladder flows into the main outer shell through siphon. The compression frame is composed of an inclined flexible frame. After compression, the spare bladder opens more easily to the main outer shell than to the reverse flow. Thus, when the main outer shell continues to wear down, the electrolyte in the spare bladder continues to flow to the main outer shell. The whole process is simple, effective, and convenient to operate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the double-sided single-pole soft-pack battery in Embodiment 1 of this utility model; Figure 2 This is an installation diagram of the support for improving liquid retention in the double-sided single-electrode soft-pack battery of Embodiment 1 of this utility model. Figure 3This is a front view of the double-sided single-electrode soft-pack battery in Embodiment 1 of this utility model; Figure 4 This is a three-dimensional structural diagram of the liquid retention capacity enhancement stent in Embodiment 1 of this utility model; Figure 5 This is an installation diagram of the support for improving the liquid retention of a single-sided bipolar soft-pack battery in Embodiment 2 of this utility model. Figure 6 This is a front view of the single-sided bipolar soft-pack battery in Embodiment 2 of this utility model.

[0014] Figure 7 This is a three-dimensional structural diagram of the battery with a single-sided bipolar plate in Embodiment 3 of this utility model; Figure 8 This is an exploded view of the structure of the single-sided bipolar battery in Embodiment 3 of this utility model; Figure 9 This is an exploded view of the single-sided bipolar cell battery in Embodiment 3 of this utility model from another perspective. Figure 10 This is a partial structural diagram of the battery with a single-sided bipolar plate in Embodiment 3 of this utility model.

[0015] Marked in the image: 1. Battery cell; 2. Positive electrode plate; 3. Negative electrode plate; 4. Positive electrode sealing ring; 5. Negative electrode sealing ring; 6. Sub-support; 7. Soft-pack outer shell; 71. Main outer shell; 72. Side protective shell; 73. Upper protective shell; 74. Lower sealing plate; 75. Upper sealing plate; 76. Support plate; 8. Main support; 9. Welding position; 10. Negative electrode plate; 11. Insulating filler plate; 13. Spare bladder; 14. Positive electrode plate; 15. Extrusion frame; 16. Sealing sheet; 17. Sealing plug; 18. Placement hole; 19. Placement slot; 20. Insulating patch; 21. External connecting piece; 22. Conduit. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0017] like Figures 1-4As shown, a support for improving liquid retention includes a secondary support 6 and a primary support 8 disposed at the end of the battery cell 1. The primary support 8 and the secondary support 6 are connected at both ends by an interlocking method. Both ends of the primary support 8 are provided with grooves, and both ends of the secondary support 6 are provided with protrusions corresponding to the shape of the grooves, ensuring the structural stability of the primary support 8 and the secondary support 6 within the soft-pack outer shell 7 of the battery after they are snapped together. The secondary support 6 is disposed in front of the welding position 9 between the electrode sheet and the battery cell 1, and the primary support 8 is disposed behind the welding position 9 between the electrode sheet and the battery cell 1. A cavity is formed between the primary support 8 and the secondary support 6 at the position corresponding to the electrode sheet after the soft-pack outer shell 7 is wrapped, thereby improving the liquid retention.

[0018] This embodiment also provides a pouch battery with dual-sided single-electrode plates, including a cell 1 and electrode plates. The electrode plates include a positive electrode plate 2 and a negative electrode plate 3. The positive electrode plate 2 is disposed at the upper end of the cell 1, and the negative electrode plate 3 is disposed at the lower end of the cell 1. A positive electrode sealing ring 4 is fitted on the positive electrode plate 2, and a negative electrode sealing ring 5 is fitted on the negative electrode plate 3 to ensure the sealing of the electrode plate position after being covered by the pouch shell 7. The positive electrode plate 2 and the cell 1 are connected by welding at welding position 9, and the negative electrode plate 3 and the cell 1 are connected by welding at welding position 9. The liquid retention support is divided into two sets and respectively fitted on the corresponding welding positions 9 of the positive electrode plate 2 and the negative electrode plate 3. The liquid retention is increased at both ends of the cell 1 to meet the timely replenishment of the electrode liquid after loss during battery use, and the welding positions 9 also play a role in wrapping and protecting the battery. Example 2

[0019] like Figures 5-6 As shown, the difference between this embodiment and Embodiment 1 is that the above-mentioned liquid retention enhancement bracket is applied to a single-sided bipolar soft-pack battery. The soft-pack battery includes a cell 1 and electrode plates, the electrode plates including a positive electrode plate 2 and a negative electrode plate 3, both of which are disposed on the upper end of the cell 1; a positive electrode sealing ring 4 is sleeved on the positive electrode plate 2, and a negative electrode sealing ring 5 is sleeved on the negative electrode plate 3; the positive electrode plate 2 and the cell 1 are connected by welding at welding position 9, and the negative electrode plate 3 and the cell 1 are connected by welding at welding position 9. The liquid retention enhancement bracket is a set and is sleeved on the corresponding welding positions 9 of the positive electrode plate 2 and the negative electrode plate 3, while simultaneously covering the positive electrode plate 2 and the negative electrode plate 3 to increase the liquid storage cavity of the liquid retention enhancement bracket, thus fixing and protecting the positive electrode plate 2 and the negative electrode plate 3. Example 3

[0020] like Figures 7-10As shown, the difference between this embodiment and embodiment 2 is that: a battery with a single-sided bipolar plate is provided, and the liquid retention enhancement bracket is set at the lower end of the cell. The battery includes a soft-pack shell 7 sleeved on the cell 1. The soft-pack shell 7 includes a main shell 71. A lower sealing plate 74 is welded to the lower end of the main shell 71. A spare bladder 13 is passed through the middle of the lower sealing plate 74. A compression frame 15 is set on the lower sealing plate 74 and sleeved on the spare bladder 13. A funnel-shaped groove is formed in the middle of the compression frame 15. A liquid retention enhancement bracket is set on the outside of the compression frame 15.

[0021] The main casing 71 provides space for the chemical reaction of the battery. During battery production, when adding electrolyte, electrolyte is added to the cell 1 and the spare bladder 13 until it is full. The corresponding slots of the auxiliary support 6 and the main support 8 are fixed together by deformation to clamp the compression frame 15 to compress the spare bladder 13, thereby isolating the space between the main casing 71 and the spare bladder 13. After leakage due to electrolytic loss, the internal pressure of the main casing 71 decreases, and the electrolyte in the spare bladder 13 flows into the main casing 71 by siphon. The compression frame 15 is composed of an inclined flexible frame. After compression, the spare bladder 13 flows into the main casing 71 and opens more easily than the reverse flow. Therefore, when the main casing 71 is continuously worn, the electrolyte in the spare bladder 13 continues to flow into the main casing 71. The whole process is simple, effective and convenient to operate.

[0022] like Figures 7-10 As shown, side protective shells 72 are fixedly connected to the outer surfaces of both sides of the main outer shell 71, and conduits 22 are fixedly connected to the inner surface of the side protective shells 72. The lower end of the conduits 22 is sealed to the spare bladder 13. The side protective shells 72 provide auxiliary protection for the battery on the side, and the conduits 22 provide a stable external connection channel to facilitate the filling of electrolyte.

[0023] The battery cell includes a positive plate, a negative plate, and a separator. The positive plate provides the positive electrode of the battery through electrolysis, and the negative plate provides the negative electrode of the battery through electrolysis. A positive electrode sheet 2 is welded to the upper end of the positive plate 14, and a negative electrode sheet 3 is welded to the upper end of the negative plate 10.

[0024] The inner surface of the side protective shell 72 is filled with glass wool; this facilitates the adsorption and storage of electrolyte. The glass wool is corrosion-resistant, chemically stable, and allows for easy air exhaust. The filling of the inner surface of the side protective shell 72 provides stable protection.

[0025] An upper sealing plate 75 is fixedly connected to the inner surface of the upper end of the main outer shell 71. A support plate 76 is movably sleeved on the upper surface of the main outer shell 71. The positive electrode 2 and the negative electrode 3 are fixedly installed on the upper sealing plate 75. The support plate 76 has placement holes 18 corresponding to the positions of the positive electrode 2 and the negative electrode 3. An upper protective shell 73 is fixedly installed on the upper surface of the support plate 76. The upper protective shell 73 has L-shaped placement grooves 19 corresponding to the positions of the positive electrode 2 and the negative electrode 3. The positive electrode 2 and the negative electrode 3 pass through the upper protective shell 73 from the placement holes 18 and the placement grooves 19, respectively, to increase the tensile strength of the electrode and the battery cell 1 and to prevent the welding position 9 from breaking and affecting the use.

[0026] A sealing plate 16 is fixedly connected to the outer surface of the protective shell 72 on both sides of the support plate 76. A sealing plug 17 is fixedly connected to the outer surface of the conduit 22. The sealing plug 17 ensures the chemical stability inside the main shell 71 by sealing the conduit 22. The support plate 76 and the sealing plate 16 are both made of corrosion-resistant rubber material (such as fluororubber, neoprene rubber, brominated butyl). The deformation allows the sealing plug 17 to be easily removed to fill the conduit 22 with electrolyte.

[0027] The inner surface of the upper protective shell 73 is filled with flame-retardant polypropylene; flame-retardant polypropylene is a commonly used flame-retardant plastic material that produces a small amount of smoke and non-dripping residue when burning, thus playing a flame-retardant role. At the same time, it is soft, which facilitates the provision of protection below.

[0028] An external connecting piece 21 is fixedly connected to the outer surface of the main housing 71. The external connecting piece 21 facilitates the fixation of the main housing 71, thereby facilitating the series and parallel connection of the circuit power supply. An insulating patch 20 is fixedly connected to the outer surface of the upper protective housing 73 corresponding to the placement slot 19. Its insulation prevents accidental contact with the electrode plate, which could lead to discharge.

[0029] In this embodiment, the positive and negative plates inside the cell 1 undergo an electrolytic reaction with electrolyte to convert chemical energy into electrical energy, which is then connected to the circuit via electrode plates to provide power. During battery production, electrolyte is added to the cell 1 and simultaneously to the spare bladder 13 until it is full. The slots corresponding to the auxiliary support 6 and the main support 8 are clamped together by deformation to squeeze the compression frame 15, thereby isolating the space between the main shell 71 and the spare bladder 13. After leakage due to electrolytic loss, the internal pressure of the main shell 71 decreases, and the electrolyte in the spare bladder 13 flows into the main shell 71 through siphon. The compression frame 15 is composed of an inclined flexible frame. After compression, the spare bladder 13 flows into the main shell 71 more easily than the reverse flow. Thus, even when the electrolyte in the cell 1 is continuously lost, the electrolyte in the spare bladder 13 continues to flow to the cell 1. Under the action of the lower sealing plate 74, the electrolyte does not flow into the conduit 22, causing instability.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A stent for improving fluid retention, characterized in that: It includes a sub-support (6) and a main support (8) set at the end of the cell (1). The two ends of the main support (8) and the sub-support (6) are connected by an interlocking method. The gap between the main support (8) and the sub-support (6) at the middle position forms a cavity after the soft shell (7) is wrapped.

2. The fluid retention capacity enhancement stent as described in claim 1, characterized in that: The main support (8) has grooves at both ends, and the secondary support (6) has protrusions at both ends that correspond to the shape of the grooves.

3. The fluid retention capacity enhancement stent as described in claim 1, characterized in that: The sub-support (6) is located in front of the welding position (9) between the electrode sheet and the battery cell (1), and the main support (8) is located behind the welding position (9) between the electrode sheet and the battery cell (1).

4. A pouch cell with dual-sided single-electrode plates, characterized in that: The liquid retention enhancement bracket as described in any one of claims 1-3 is used; the soft-pack battery includes a cell (1) and electrode plates, the electrode plates including a positive electrode plate (2) and a negative electrode plate (3), the positive electrode plate (2) is disposed at the upper end of the cell (1), and the negative electrode plate (3) is disposed at the lower end of the cell (1); a positive electrode sealing ring (4) is sleeved on the positive electrode plate (2), and a negative electrode sealing ring (5) is sleeved on the negative electrode plate (3); the positive electrode plate (2) and the cell (1) are connected by welding at the welding position (9), and the negative electrode plate (3) and the cell (1) are connected by welding at the welding position (9), and the liquid retention enhancement bracket is in two sets and is respectively sleeved on the welding positions (9) corresponding to the positive electrode plate (2) and the negative electrode plate (3).

5. A pouch cell with a single-sided bipolar plate, characterized in that: Using the liquid retention enhancement bracket as described in any one of claims 1-3, the soft-pack battery includes a cell (1) and electrode plates, the electrode plates including a positive electrode plate (2) and a negative electrode plate (3), the positive electrode plate (2) and the negative electrode plate (3) are both disposed on the upper end of the cell (1); a positive electrode sealing ring (4) is sleeved on the positive electrode plate (2), and a negative electrode sealing ring (5) is sleeved on the negative electrode plate (3); the positive electrode plate (2) and the cell (1) are connected by welding at the welding position (9), the negative electrode plate (3) and the cell (1) are connected by welding at the welding position (9), and the liquid retention enhancement bracket is a set and is sleeved on the corresponding welding positions (9) of the positive electrode plate (2) and the negative electrode plate (3).

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