Moisture-proof lithium ion battery of lithium iron phosphate

Abstract

The utility model discloses a kind of damp-proof lithium ion battery of lithium phosphate iron, belong to lithium ion battery field, including battery component, battery component includes first electric core, the side of first electric core is equipped with second electric core, the side surface of first electric core and second electric core is equipped with damp-proof mechanism, the side surface of damp-proof mechanism is equipped with ventilation mechanism, the bottom of ventilation mechanism is equipped with drying mechanism, the top of ventilation mechanism is equipped with electrode plate, the surface of electrode plate is equipped with positive electrode connecting end and negative electrode connecting end respectively, the surface of electrode plate is equipped with sealing cover, the inside of sealing cover is equipped with first sealing sheet, the battery component of the utility model is set, not only can significantly improve the damp-proof performance of lithium ion battery by ventilation and drying mode, to enhance the use safety of lithium ion battery, simultaneously, the stability of lithium ion battery pack splicing can be improved by the above structure cooperation, the practicability of lithium ion battery can be enhanced.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion batteries, specifically a moisture-proof lithium iron phosphate lithium-ion battery. Background Technology

[0002] Lithium iron phosphate batteries are a type of lithium-ion rechargeable battery, currently mainly used in the field of power batteries, and have many advantages. It performs excellently in terms of cycle life, safety performance, and operating temperature range, and is therefore widely used in new energy vehicles, energy storage, and other fields. To ensure the safety of lithium-ion batteries, it is necessary to use lithium-ion batteries with moisture-proof properties. Among them, the "Moisture-proof Lithium Iron Phosphate Lithium-ion Battery" disclosed in application number "202322427913.9" is an increasingly mature technology. It "through the setting of an inner core layer and an insulating pad, the inner core layer contains a lithium iron phosphate positive electrode layer, a moisture-proof film, and a water-blocking layer. The lithium iron phosphate positive electrode layer has high safety, while the moisture-proof film and water-blocking layer can prevent the entry of external moisture. The inner core layer is equipped with an insulating pad, and the insulating pad and its internal bonding sheet can seal the gaps between the positive and negative electrodes, preventing moisture from entering the lithium-ion battery body. Through the setting of a composite moisture-proof layer, a barrier layer, and a coating layer, the composite moisture-proof layer is set outside the inner frame, and the barrier layer and the coating layer are set inside the inner frame, which can cover the outer part of the inner core layer layer by layer, preventing water from entering the inner core layer." The design incorporates a bending component and an outer rubber pad, with the outer rubber pad and elastic pad respectively mounted on both sides of the bending component. These pads reduce damage to the lithium-ion battery body after impact. An outer cover layer, attached to the outside of the insulating pad and outer shell, enhances the stability of the insulating pad. The retaining seat, mounted on the outside of the inner core layer, limits its stability. However, this lithium-ion battery has the following drawbacks: While the moisture-proof film and composite moisture-proof layer do provide moisture protection, the effect is insufficient. Therefore, a lithium-ion battery that provides multiple moisture-proof methods to ensure safe use is necessary. Furthermore, the stability of this lithium-ion battery structure needs improvement when assembled into a battery pack. Therefore, a lithium-ion battery that is easy to assemble and ensures stable operation is also necessary. Utility Model Content

[0003] The present invention provides a moisture-proof lithium iron phosphate lithium-ion battery, which aims to solve the problems that the moisture-proof performance of existing lithium-ion batteries is not significant enough, and the stability during splicing and assembly needs to be improved.

[0004] To achieve the above objectives, this utility model provides a moisture-proof lithium iron phosphate lithium-ion battery, including a battery assembly; The battery assembly includes a first cell, a second cell on one side of the first cell, a moisture-proof mechanism on the side surface of both the first and second cells, a ventilation mechanism on the side surface of the moisture-proof mechanism, a drying mechanism at the bottom of the ventilation mechanism, an electrode plate on the top of the ventilation mechanism, a positive electrode connection end and a negative electrode connection end on the surface of the electrode plate, a sealing cover on the surface of the electrode plate, a first sealing sheet inside the sealing cover, and a connection mechanism at the bottom of the first and second cells.

[0005] As a preferred embodiment of the present invention, the moisture-proof mechanism includes a diaphragm sleeved on the surface of the first battery cell and the second battery cell, wherein the surface of the first battery cell and the second battery cell is covered with an insulating film, and the diaphragm is made of transparent polyethylene.

[0006] As a preferred embodiment of the present invention, the ventilation mechanism includes a protective sleeve fitted onto the surface of the insulating film, the surface of the protective sleeve having a plurality of ventilation openings, and a second sealing plate installed at the bottom of the ventilation openings.

[0007] As a preferred embodiment of this utility model, the drying mechanism includes a fixing ring installed at the bottom of the protective sleeve, and the fixing ring contains a desiccant.

[0008] As a preferred embodiment of this utility model, the connecting mechanism includes a first connecting plate and a second connecting plate installed at the bottom of the two protective sleeves. Two positioning blocks are fixedly connected to both sides of the first connecting plate, and two positioning grooves are opened on both sides of the second connecting plate. The two positioning blocks are engaged inside the positioning grooves.

[0009] As a preferred embodiment of this utility model, the bottom of the protective sleeve is fixedly connected to two locking blocks, and both ends of the second sealing sheet are provided with locking grooves, and the locking blocks are engaged inside the locking grooves.

[0010] As a preferred embodiment of this utility model, the bottom of the protective sleeve is provided with a circular groove, the fixing ring is installed inside the circular groove, and arc-shaped grooves are provided on both sides of the inner wall of the circular groove. Arc-shaped pieces are fixedly connected to both sides of the fixing ring, and the arc-shaped pieces are snapped into the inside of the arc-shaped groove.

[0011] As a preferred embodiment of this utility model, the bottom of the protective sleeve has two conical grooves, and the upper ends of the first connecting plate and the second connecting plate are fixedly connected to two conical blocks, and the two conical blocks are engaged inside the conical grooves.

[0012] Compared with the prior art, the beneficial effects of this utility model are: When using lithium-ion batteries, the transparent polyethylene separator combined with the insulating film can initially achieve waterproof and moisture-proof effects. At the same time, the sealing cover has a first sealing sheet made of rubber and a second sealing sheet at the bottom of the protective sleeve, which can seal the first and second cells from the top and bottom to prevent moisture from entering the lithium-ion battery. Meanwhile, the protective sleeve made of cast aluminum, combined with the ventilation port, not only provides protection but also ventilation to expel internal moisture. Finally, the desiccant in the drying mechanism can absorb the moisture inside the lithium-ion battery, significantly enhancing the moisture-proof performance of the lithium-ion battery. Compared with the lithium-ion battery in the existing technology "a moisture-proof lithium iron phosphate lithium-ion battery", this utility model can achieve multiple ventilation, moisture-proof and drying effects through the above-mentioned structure, thereby improving the safety of lithium-ion battery use. When installing a lithium-ion battery pack, simply engaging the conical block inside the conical groove improves the connection stability between the lithium-ion battery, the first connecting plate, and the second connecting plate. Finally, engaging the two positioning blocks on both sides of the first connecting plate inside the positioning groove facilitates the stable assembly of several lithium-ion batteries. Compared to the lithium-ion battery in the existing technology "a moisture-proof lithium iron phosphate lithium-ion battery", this utility model significantly improves the assembly stability of lithium-ion batteries through the cooperation of the above structures, thereby enhancing practicality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the battery cell structure of this utility model; Figure 3 This is a cross-sectional view of the protective sleeve structure of this utility model; Figure 4 This is an anatomical diagram of the sealing cap structure of this utility model; Figure 5 This is an anatomical diagram of the connection structure of this utility model.

[0014] In the diagram: 100, Battery assembly; 101, First cell; 102, Second cell; 103, Moisture-proof mechanism; 104, Ventilation mechanism; 105, Drying mechanism; 106, Electrode plate; 107, Positive electrode connection end; 108, Negative electrode connection end; 109, Sealing cap; 110, First sealing sheet; 120, Connecting mechanism; 1031, Separator; 1032, Insulating film; 1041, Protective sleeve; 1042, Ventilation opening; 1043, Second sealing sheet; 1051, Fixing ring; 1052, Desiccant; 1201, First connecting plate; 1202, Second connecting plate; 1203, Positioning block; 1204, Positioning groove; 111, Locking block; 112, Locking slot; 121, Circular groove; 122, Arc groove; 123, Arc piece; 131, Conical groove; 132, Conical block. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1 Please see Figures 1-5 This utility model provides a moisture-proof lithium iron phosphate lithium-ion battery, including a battery assembly 100; The battery assembly 100 includes a first cell 101, a second cell 102 on one side of the first cell 101, a moisture-proof mechanism 103 on the side surface of both the first cell 101 and the second cell 102, a ventilation mechanism 104 on the side surface of the moisture-proof mechanism 103, a drying mechanism 105 installed at the bottom of the ventilation mechanism 104, an electrode plate 106 on the top of the ventilation mechanism 104, a positive electrode connection end 107 and a negative electrode connection end 108 respectively on the surface of the electrode plate 106, a sealing cover 109 on the surface of the electrode plate 106, a first sealing sheet 110 installed inside the sealing cover 109, and a connection mechanism 120 at the bottom of the first cell 101 and the second cell 102.

[0017] In one specific embodiment, the battery assembly 100 not only significantly improves the moisture resistance of the lithium-ion battery through ventilation and drying, thereby enhancing its safety, but also improves the stability of the lithium-ion battery pack during assembly, thus enhancing its practicality. During use, the transparent polyethylene separator 1031 and insulating film 1032 provide initial waterproofing and moisture resistance. Simultaneously, the first rubber sealing sheet 110 and the second sealing sheet 1043 at the bottom of the protective sleeve 1041 seal the upper and lower ends of the first and second cells 101 and 102, preventing moisture from entering the lithium-ion battery. The cast aluminum protective sleeve... The combination of 1041 and vent 1042 not only protects the lithium-ion battery but also provides ventilation to remove internal moisture. Finally, the desiccant 1052 in the drying mechanism 105 absorbs the moisture inside the lithium-ion battery, significantly enhancing its moisture resistance and improving safety. Furthermore, by engaging the conical block 132 inside the conical groove 131, the connection stability between the lithium-ion battery and the first connecting plate 1201 and the second connecting plate 1202 is improved. Finally, the two positioning blocks 1203 on both sides of the first connecting plate 1201 are engaged inside the positioning groove 1204, allowing for the stable assembly of multiple lithium-ion batteries and enhancing their practicality.

[0018] Please see Figure 2 The moisture-proof mechanism 103 includes a diaphragm 1031 sleeved on the surface of the first battery cell 101 and the second battery cell 102. An insulating film 1032 is sleeved on the surface of the first battery cell 101 and the second battery cell 102. The diaphragm 1031 is made of transparent polyethylene.

[0019] In one specific embodiment, the separator 1031, together with the insulating film 1032, can prevent external moisture from entering the lithium-ion battery, thereby achieving a preliminary moisture-proof effect.

[0020] Please see Figure 2 and Figure 3 The ventilation mechanism 104 includes a protective sleeve 1041 fitted onto the surface of the insulating film 1032. The surface of the protective sleeve 1041 has a plurality of ventilation openings 1042, and a second sealing plate 1043 is installed at the bottom of the ventilation openings 1042.

[0021] In one specific embodiment, a protective sleeve 1041 made of cast aluminum can protect the lithium-ion battery, and a second sealing sheet 1043 made of rubber at the bottom can seal the lithium-ion battery from the bottom, further improving the moisture-proof performance.

[0022] Please see Figure 3The drying mechanism 105 includes a retaining ring 1051 installed at the bottom of the protective sleeve 1041, and a desiccant 1052 is provided inside the retaining ring 1051.

[0023] In one specific embodiment, the desiccant 1052 in the fixing ring 1051 can absorb moisture in the lithium-ion battery, significantly improving the drying effect of the lithium-ion battery and enhancing its safety.

[0024] Please see Figure 5 The connecting mechanism 120 includes a first connecting plate 1201 and a second connecting plate 1202 installed at the bottom of the two protective sleeves 1041. Two positioning blocks 1203 are fixedly connected to both sides of the first connecting plate 1201. Two positioning grooves 1204 are opened on both sides of the second connecting plate 1202. The two positioning blocks 1203 are engaged inside the positioning grooves 1204.

[0025] In one specific embodiment, the first connecting plate 1201 and the second connecting plate 1202 can be connected by the positioning block 1203 being snapped into the positioning groove 1204, thereby improving the splicing stability and convenience of the lithium-ion battery pack.

[0026] Please see Figures 2-5 The bottom of the protective sleeve 1041 is fixedly connected to two locking blocks 111, and both ends of the second sealing sheet 1043 are provided with locking grooves 112, and the locking blocks 111 are locked inside the locking grooves 112.

[0027] In one specific embodiment, the locking block 111 engaging within the slot 112 can improve the stability of the second sealing sheet 1043 installed inside the protective sleeve 1041, preventing loosening and reducing the sealing and protection effect on the lithium-ion battery.

[0028] Please see Figures 2-5 The bottom of the protective sleeve 1041 is provided with a circular groove 121, and the fixing ring 1051 is installed inside the circular groove 121. Both sides of the inner wall of the circular groove 121 are provided with arc-shaped grooves 122. Both sides of the fixing ring 1051 are fixedly connected with arc-shaped pieces 123, which are snapped into the inside of the arc-shaped grooves 122.

[0029] In one specific embodiment, the circular groove 121 can enhance the installation stability of the fixing ring 1051, and the arc-shaped piece 123 is snapped into the arc-shaped groove 122, thereby improving the ease of disassembly and replacement of the fixing ring 1051.

[0030] Please see Figures 2-5 The bottom of the protective sleeve 1041 has two conical grooves 131. The upper ends of the first connecting plate 1201 and the second connecting plate 1202 are fixedly connected to two conical blocks 132, and the two conical blocks 132 are engaged inside the conical grooves 131.

[0031] In one specific embodiment, the conical block 132 being engaged inside the conical groove 131 can improve the connection stability between the protective sleeve 1041 and the first connecting plate 1201 and the second connecting plate 1202.

[0032] Working principle: During use, the transparent polyethylene diaphragm 1031 and the insulating film 1032 provide initial waterproof and moisture-proof effects. Then, the first rubber sealing sheet 110 and the second sealing sheet 1043 at the bottom of the protective sleeve 1041 seal the upper and lower ends of the first and second cells 101, preventing moisture from entering the lithium-ion battery. Simultaneously, the cast aluminum protective sleeve 1041, with its ventilation opening 1042, protects the lithium-ion battery and provides ventilation, allowing internal moisture to escape. Finally, the water is released through the ventilation opening. The desiccant 1052 in the drying mechanism 105 can absorb the moisture inside the lithium-ion battery, thus significantly enhancing the moisture resistance of the lithium-ion battery and improving its safety. Finally, by engaging the conical block 132 inside the conical groove 131, the connection stability between the lithium-ion battery and the first connecting plate 1201 and the second connecting plate 1202 can be improved. Then, by engaging the two positioning blocks 1203 on both sides of the first connecting plate 1201 inside the positioning groove 1204, several lithium-ion batteries can be stably spliced ​​together, thus enhancing the practicality of the lithium-ion battery.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A moisture-proof lithium iron phosphate lithium-ion battery, characterized in that, include: A battery assembly (100) includes a first cell (101), a second cell (102) is provided on one side of the first cell (101), a moisture-proof mechanism (103) is provided on the side surface of both the first cell (101) and the second cell (102), a ventilation mechanism (104) is provided on the side surface of the moisture-proof mechanism (103), a drying mechanism (105) is installed at the bottom of the ventilation mechanism (104), an electrode plate (106) is provided on the top of the ventilation mechanism (104), a positive electrode connection end (107) and a negative electrode connection end (108) are respectively provided on the surface of the electrode plate (106), a sealing cover (109) is provided on the surface of the electrode plate (106), a first sealing sheet (110) is installed inside the sealing cover (109), and a connection mechanism (120) is provided at the bottom of the first cell (101) and the second cell (102).

2. The moisture-proof lithium iron phosphate lithium-ion battery according to claim 1, characterized in that: The moisture-proof mechanism (103) includes a diaphragm (1031) sleeved on the surface of the first battery cell (101) and the second battery cell (102). The surface of the first battery cell (101) and the second battery cell (102) is covered with an insulating film (1032). The diaphragm (1031) is made of transparent polyethylene.

3. A moisture-proof lithium iron phosphate lithium-ion battery according to claim 2, characterized in that: The ventilation mechanism (104) includes a protective sleeve (1041) fitted onto the surface of the insulating film (1032), and the surface of the protective sleeve (1041) is provided with a plurality of ventilation openings (1042), and a second sealing plate (1043) is installed at the bottom of the ventilation openings (1042).

4. A moisture-proof lithium iron phosphate lithium-ion battery according to claim 3, characterized in that: The drying mechanism (105) includes a retaining ring (1051) installed at the bottom of the protective sleeve (1041), and the inside of the retaining ring (1051) is provided with a desiccant (1052).

5. A moisture-proof lithium iron phosphate lithium-ion battery according to claim 4, characterized in that: The connecting mechanism (120) includes a first connecting plate (1201) and a second connecting plate (1202) installed at the bottom of the two protective sleeves (1041). Two positioning blocks (1203) are fixedly connected to both sides of the first connecting plate (1201), and two positioning grooves (1204) are opened on both sides of the second connecting plate (1202). The two positioning blocks (1203) are engaged inside the positioning grooves (1204).

6. A moisture-proof lithium iron phosphate lithium-ion battery according to claim 3, characterized in that: The bottom of the protective sleeve (1041) is fixedly connected to two locking blocks (111), and both ends of the second sealing sheet (1043) are provided with locking grooves (112), and the locking blocks (111) are engaged inside the locking grooves (112).

7. A moisture-proof lithium iron phosphate lithium-ion battery according to claim 5, characterized in that: The bottom of the protective sleeve (1041) is provided with a circular groove (121), and the fixing ring (1051) is installed inside the circular groove (121). Both sides of the inner wall of the circular groove (121) are provided with arc-shaped grooves (122), and both sides of the fixing ring (1051) are fixedly connected with arc-shaped pieces (123), which are snapped into the inside of the arc-shaped grooves (122).

8. A moisture-proof lithium iron phosphate lithium-ion battery according to claim 7, characterized in that: The bottom of the protective sleeve (1041) has two conical grooves (131). The upper ends of the first connecting plate (1201) and the second connecting plate (1202) are fixedly connected to two conical blocks (132), and the two conical blocks (132) are engaged inside the conical grooves (131).

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