Lithium battery pack with moisture-proof function

Abstract

The utility model discloses a lithium battery pack with a moisture-proof function, which comprises a lithium battery pack shell, lithium battery monomers are arranged in the lithium battery pack shell, a cover body is arranged at the top of the lithium battery pack shell, and a dehumidification mechanism is arranged in the lithium battery pack shell; the dehumidification mechanism comprises two storage boxes, two cover plates, a separation net and two connecting rods, the front sides of the storage boxes are fixedly connected with the rear sides of the cover plates, the separation net is fixedly connected into the storage boxes, and the connecting rods are fixedly connected between the opposite sides of the two cover plates. The problems that in the prior art, a cover plate needs to be completely opened, if operation is improper, the hand is prone to making contact with an internal lithium battery monomer, electric shock, short circuit and other dangerous situations exist, certain potential safety hazards exist, the personal safety of operators is threatened, a battery pack is possibly damaged, and normal operation of equipment is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery packs, and in particular to a lithium battery pack with moisture-proof function. Background Technology

[0002] A lithium battery pack is a battery system composed of multiple lithium battery cells connected in series, parallel, or a combination of series and parallel connections, and equipped with a battery management system (BMS) and other auxiliary components. In today's energy field, lithium battery packs are widely used in many key areas such as electric vehicles, consumer electronics, and energy storage systems due to their high energy density, long cycle life, and excellent charge and discharge performance, becoming an important power source supporting the development of modern technology. However, lithium battery packs often face the challenge of humid environments during actual use. Moisture intrusion can lead to battery capacity decay, increased internal resistance, and even safety accidents. Therefore, moisture protection is crucial for lithium battery packs.

[0003] Currently, Chinese patent CN221447330U discloses a lithium battery with moisture-proof function. This lithium battery with moisture-proof function absorbs moisture from the air inside the lithium battery pack housing by inserting a moisture-absorbing plate into the storage groove on the corresponding lithium battery pack housing and absorbing moisture from the air inside the lithium battery pack housing through the moisture-absorbing plate and the vent holes. When replacing the moisture-absorbing plate, the connecting cover is removed, and the moisture-absorbing plate can be pulled out through the arc groove and a new one can be inserted. This method is convenient for disassembly and replacement.

[0004] When replacing the moisture-absorbing plate proposed in the aforementioned patent, the cover needs to be fully opened. If the operation is not done properly, the hand may come into contact with the internal lithium battery cells, which may pose a danger of electric shock, short circuit, etc., and pose a certain safety hazard. It not only threatens the personal safety of the operator, but may also damage the battery pack and affect the normal operation of the equipment. Utility Model Content

[0005] The main purpose of this utility model is to provide a lithium battery pack with a moisture-proof function, which aims to solve the problem that when the moisture-absorbing plate in the existing patent needs to be replaced, the cover needs to be fully opened. If the operation is not done properly, the hand can easily come into contact with the internal lithium battery cells, which may lead to electric shock, short circuit and other dangerous situations. This poses a certain safety hazard, which not only threatens the personal safety of the operator, but may also damage the battery pack and affect the normal operation of the equipment.

[0006] To achieve the above objectives, this utility model proposes a lithium battery pack with moisture-proof function, which includes a lithium battery pack housing, a lithium battery cell disposed inside the lithium battery pack housing, a cover disposed on the top of the lithium battery pack housing, and a dehumidification mechanism disposed inside the lithium battery pack housing.

[0007] The dehumidification mechanism includes two storage boxes, two cover plates, a mesh screen, and two connecting rods. The front side of the storage box is fixedly connected to the rear side of the cover plate. The mesh screen is fixedly connected inside the storage box. The connecting rods are fixedly connected between the two cover plates on opposite sides. The storage box is movably inserted into the interior of the lithium battery pack housing.

[0008] Preferably, the storage box contains a desiccant, and the top of the storage box is provided with a limiting cover, the surface of which is in close contact with the inner wall of the storage box.

[0009] Preferably, a sealing gasket is fixedly connected to the rear side of the cover plate, and the rear side of the sealing gasket is in close contact with the front side of the lithium battery pack housing.

[0010] Preferably, a limit button is provided on the front side of the connecting rod, and the rear side of the limit button passes through the connecting rod and is threadedly connected to the internal structure of the lithium battery pack housing.

[0011] Preferably, a partition frame is fixedly connected to the bottom of the inner wall of the lithium battery pack housing, the surface of the lithium battery cell is in contact with the inner wall of the partition frame, and the bottom of the storage box is in contact with the top of the partition frame.

[0012] Preferably, a limiting frame is fixedly connected to the bottom of the cover, and the surface of the limiting frame is in contact with the surface of the lithium battery cell.

[0013] Preferably, limiting blocks are fixedly connected to the front and rear sides of both sides of the cover, the surface of the limiting blocks is in contact with the surface of the lithium battery pack housing, and screws are provided on the front and rear sides of both sides of the cover, the side of the screws near the limiting blocks passes through the limiting blocks and is connected to the internal threads of the lithium battery pack housing.

[0014] Preferably, handles are fixedly connected to the front and rear sides of the top of the cover, and terminals are provided on both sides of the top of the cover. The bottom of the terminals passes through the cover and extends into the interior of the lithium battery pack housing, and the surface of the terminals is fixedly connected to the interior of the cover.

[0015] In this invention, the desiccant is inserted into the storage box. Because the separators separate the individual lithium battery cells, a gap exists between the individual cells and the inner wall of the battery pack casing, allowing the storage box to be easily inserted from the front. The limiting button is then passed through the connecting rod and connected to the internal threads of the battery pack casing, thus securing the storage box inside the casing. The cover is then closed, and a screw is passed through the limiting block and connected to the internal threads of the battery pack casing, connecting the cover to the casing. At this point, the desiccant can absorb moisture from inside the battery pack casing through the mesh, keeping the individual lithium battery cells dry. When the desiccant needs to be replaced, simply remove the limiting button. By simply pressing the button, the storage box can be pulled out from inside the lithium battery pack casing. Then, by pulling up the limiting cover, the storage box can be opened for easy replacement of the desiccant. This eliminates the need to open the cover completely, exposing the lithium battery cells, to replace the desiccant. During the desiccant replacement process, the hands will not come into contact with the lithium battery cells inside the battery pack casing, avoiding potential safety hazards. This avoids the problem of existing patents where the moisture-absorbing plate requires the cover to be fully opened during replacement. If not handled properly, the hands could easily come into contact with the internal lithium battery cells, posing a risk of electric shock, short circuit, or other dangers. This not only threatens the personal safety of the operator but may also damage the battery pack and affect the normal operation of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the internal structure of the lithium battery pack housing in an embodiment of this utility model;

[0019] Figure 3 This is a three-dimensional connection diagram of the dehumidification mechanism in an embodiment of this utility model;

[0020] Figure 4 This is a three-dimensional exploded view of the cover and the limiting frame in an embodiment of this utility model;

[0021] Figure 5 This is a three-dimensional exploded view of the lithium battery cell and the separator frame in an embodiment of this utility model;

[0022] Figure 6 This is an exploded perspective view of the storage box and the limiting cover in an embodiment of the present utility model;

[0023] Figure 7 This is an embodiment of the present utility model. Figure 3 A magnified view of a portion of point A in the middle.

[0024] The following are the reference numerals: 1. Lithium battery pack casing; 2. Desiccant; 3. Limit button; 4. Terminal; 5. Cover; 6. Handle; 7. Lithium battery cell; 8. Dehumidification mechanism; 801. Storage box; 802. Cover plate; 803. Spare mesh; 804. Connecting rod; 9. Limit cover; 10. Limit block; 11. Screw; 12. Limit frame; 13. Divider frame; 14. Sealing gasket.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] 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.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This utility model provides a lithium battery pack with moisture-proof function, which aims to solve the problem proposed in the existing patent that when the moisture-absorbing plate is replaced, the cover needs to be fully opened. If the operation is not done properly, the hand can easily come into contact with the internal lithium battery cells, which may cause electric shock, short circuit and other dangers. This poses certain safety hazards, which not only threaten the personal safety of the operator, but may also damage the battery pack and affect the normal operation of the equipment.

[0031] like Figure 1-7 As shown, the present invention provides a lithium battery pack with moisture-proof function, including a lithium battery pack housing 1, a lithium battery cell 7 disposed inside the lithium battery pack housing 1, a cover 5 disposed on the top of the lithium battery pack housing 1, and a dehumidification mechanism 8 disposed inside the lithium battery pack housing 1.

[0032] The dehumidification mechanism 8 includes two storage boxes 801, two cover plates 802, a mesh 803, and two connecting rods 804. The front side of the storage box 801 is fixedly connected to the rear side of the cover plate 802. The mesh 803 is fixedly connected inside the storage box 801. The connecting rods 804 are fixedly connected between the opposite sides of the two cover plates 802. The storage box 801 is movably inserted into the inside of the lithium battery pack housing 1.

[0033] In this invention, the desiccant 2 is inserted into the storage box 801. Because the separator frame 13 separates the lithium battery cells 7, a gap exists between the lithium battery cells 7 and the inner wall of the lithium battery pack housing 1, allowing the storage box 801 to be easily inserted from the front. The limiting button 3 passes through the connecting rod 804 and is threaded into the inside of the lithium battery pack housing 1, thus limiting the storage box 801 inside the lithium battery pack housing 1. Then, the cover 802 is closed, and the screw 11 passes through the limiting block 10 and is threaded into the inside of the lithium battery pack housing 1, connecting the cover 802 to the lithium battery pack housing 1. At this point, the desiccant 2 can absorb moisture inside the lithium battery pack housing 1 through the mesh 803, keeping the lithium battery cells 7 inside the lithium battery pack housing 1 in a dry working state. When further drying of the desiccant 2 is required... When replacing the desiccant 2, simply remove the limiting button 3 to pull the storage box 801 out from inside the lithium battery pack housing 1, and then pull up the limiting cover 9 to open the storage box 801. This facilitates the replacement of the desiccant 2 without having to open the cover 5 to completely expose the lithium battery cells 7. During the replacement of the desiccant 2, the hands will not come into contact with the lithium battery cells 7 inside the lithium battery pack housing 1, avoiding safety hazards. This avoids the problem in existing patents where the moisture-absorbing plate needs to be completely opened when replacing, which could easily lead to contact between the hands and the internal lithium battery cells 7 if not handled properly, posing a risk of electric shock, short circuit, or other dangers. This not only threatens the personal safety of the operator but may also damage the battery pack and affect the normal operation of the equipment.

[0034] Please refer to the following: Figure 6 The storage box 801 contains a desiccant 2, and a limiting cover 9 is provided on the top of the storage box 801, with the surface of the limiting cover 9 in close contact with the inner wall of the storage box 801. In this embodiment, by pouring the desiccant 2 into the storage box 801 and ensuring the limiting cover 9 is in close contact with the inner wall of the storage box 801, the desiccant 2 inside the storage box 801 can be prevented from spilling out. Furthermore, after the storage box 801 is inserted into the lithium battery pack housing 1, the desiccant 2 can absorb moisture inside the lithium battery pack housing 1 through the mesh 803.

[0035] For further information, please continue to refer to [link / reference]. Figure 1 , Figure 3 and Figure 7 A sealing gasket 14 is fixedly connected to the rear side of the cover plate 802, and the rear side of the sealing gasket 14 is in close contact with the front side of the lithium battery pack housing 1. In this embodiment, by making close contact between the rear side of the sealing gasket 14 and the front side of the lithium battery pack housing 1, the sealing gasket 14 can seal the space between the cover plate 802 and the lithium battery pack housing 1.

[0036] Please continue to refer to this. Figure 2 and Figure 3 A limit button 3 is provided on the front side of the connecting rod 804, and the rear side of the limit button 3 passes through the connecting rod 804 and is threadedly connected to the inside of the lithium battery pack housing 1. In this embodiment, by passing the limit button 3 through the connecting rod 804 and then threading the limit button 3 to the inside of the lithium battery pack housing 1, the connecting rod 804, the cover plate 802, and the storage box 801 can be limited, thereby limiting the storage box 801 inside the lithium battery pack housing 1.

[0037] Please refer to Figure 2 and Figure 5 A partition frame 13 is fixedly connected to the bottom of the inner wall of the lithium battery pack housing 1. The surface of the lithium battery cell 7 is in contact with the inner wall of the partition frame 13, and the bottom of the storage box 801 is in contact with the top of the partition frame 13. In this embodiment, by using the partition frame 13 to separate the lithium battery cells 7, a gap is created between the lithium battery cells 7 and the inner wall of the lithium battery pack housing 1, making it convenient for the storage box 801 to be inserted into the lithium battery pack housing 1.

[0038] Additionally, please refer to Figure 2 and Figure 4 A limiting frame 12 is fixedly connected to the bottom of the cover 5, and the surface of the limiting frame 12 is in contact with the surface of the lithium battery cell 7. In this embodiment, by using the limiting frame 12 to further limit the lithium battery cell 7 at intervals, the lithium battery cell 7 can be made more stable inside the lithium battery pack housing 1.

[0039] Please refer to Figure 1 , Figure 2 and Figure 4 Limiting blocks 10 are fixedly connected to the front and rear sides of both sides of the cover 5. The surface of the limiting blocks 10 is in contact with the surface of the lithium battery pack housing 1. Screws 11 are provided on the front and rear sides of both sides of the cover 5. The side of the screw 11 closest to the limiting block 10 passes through the limiting block 10 and is connected to the internal thread of the lithium battery pack housing 1. In this embodiment, by covering the top of the lithium battery pack housing 1 with the cover 5, so that the surface of the limiting block 10 is in contact with the surface of the lithium battery pack housing 1, and then inserting the limiting bracket 12 into the gap between the lithium battery cells 7, and passing the screw 11 through the limiting block 10 and connecting it to the internal thread of the lithium battery pack housing 1, the cover 5 and the lithium battery pack housing 1 can be connected.

[0040] Additionally, please refer to Figure 1Handles 6 are fixedly connected to the front and rear sides of the top of the cover 5. Terminal posts 4 are provided on both sides of the top of the cover 5. The bottom of the terminal post 4 passes through the cover 5 and extends into the interior of the lithium battery pack housing 1. The surface of the terminal post 4 is fixedly connected to the interior of the cover 5. In this embodiment, the cover 5 can be easily moved by holding the handles 6. Three lithium battery cells 7 are connected in series using an external connecting cable, and then connected to the terminal post 4 from inside the lithium battery pack housing 1. At this point, the terminal post 4 can be used to connect to an external power supply.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A lithium battery pack with moisture-proof function, characterized in that, The moisture-proof lithium battery pack includes a lithium battery pack shell (1), the inside of the lithium battery pack shell (1) is provided with lithium battery monomer (7), the top of the lithium battery pack shell (1) is provided with cover (5), the inside of the lithium battery pack shell (1) is provided with dehumidification mechanism (8); The dehumidification mechanism (8) includes two storage boxes (801), two cover plates (802), a separation net (803) and two connecting rods (804), the front side of the storage box (801) is fixedly connected with the rear side of the cover plate (802), the separation net (803) is fixedly connected inside the storage box (801), the connecting rod (804) is fixedly connected between the opposite sides of the two cover plates (802), and the storage box (801) is movably inserted into the inside of the lithium battery pack shell (1).

2. The lithium battery pack with moisture-proof function according to claim 1, characterized in that, The inside of the storage box (801) is placed with a desiccant (2), and the top of the storage box (801) is provided with a limiting cover (9), and the surface of the limiting cover (9) is in close contact with the inner wall of the storage box (801).

3. The lithium battery pack with moisture-proof function according to claim 1, characterized in that, The rear side of the cover plate (802) is fixedly connected with a sealing gasket (14), and the rear side of the sealing gasket (14) is in close contact with the front side of the lithium battery pack shell (1).

4. The lithium battery pack with moisture-proof function according to claim 1, wherein, The front side of the connecting rod (804) is provided with a limiting knob (3), and the rear side of the limiting knob (3) passes through the connecting rod (804) and is threadedly connected with the inside of the lithium battery pack shell (1).

5. The lithium battery pack with moisture-proof function according to claim 1, wherein The bottom of the inner wall of the lithium battery pack shell (1) is fixedly connected with a partition frame (13), the surface of the lithium battery monomer (7) is in contact with the inner wall of the partition frame (13), and the bottom of the storage box (801) is in contact with the top of the partition frame (13).

6. The lithium battery pack with moisture-proof function according to claim 1, wherein, The bottom of the cover (5) is fixedly connected with a limiting frame (12), and the surface of the limiting frame (12) is in contact with the surface of the lithium battery monomer (7).

7. The lithium battery pack with moisture-proof function according to claim 1, wherein, The front side and the rear side of the two sides of the cover (5) are fixedly connected with a limiting block (10), and the surface of the limiting block (10) is in contact with the surface of the lithium battery pack shell (1), the front side and the rear side of the two sides of the cover (5) are provided with screws (11), one side of the screw (11) close to the limiting block (10) passes through the limiting block (10) and is threadedly connected with the inside of the lithium battery pack shell (1).

8. The lithium battery pack with moisture-proof function according to claim 1, wherein, The front side and the rear side of the top of the cover (5) are fixedly connected with a handle (6), the two sides of the top of the cover (5) are provided with a terminal post (4), the bottom of the terminal post (4) passes through the cover (5) and extends to the inside of the lithium battery pack shell (1), and the surface of the terminal post (4) is fixedly connected with the inside of the cover (5).

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