Lithium iron phosphate low-temperature battery pack

Abstract

The utility model discloses a lithium iron phosphate low-temperature battery pack, which belongs to the technical field of lithium iron phosphate batteries, solves the problems of inconvenience in carrying, disassembly and assembly and low safety in the prior art, and comprises a cylinder body, a top cover arranged on the surface of the cylinder body, a bottom cover arranged at the bottom of the cylinder body, and a circuit board arranged at the top end in the cylinder body, the circuit board is electrically connected with a battery assembly arranged in the cylinder, the battery assembly comprises a tail board, a tail board clamping strip is arranged on the end face of the tail board, the clamping groove is connected with the tail board clamping strip, and a top end battery inserting board is connected with the top board. A plurality of lithium iron phosphate batteries are vertically stacked in the barrel body, the utilization of the cylindrical space is maximized, meanwhile, the whole lithium iron phosphate batteries are arranged in the cylinder, so that the lithium iron phosphate batteries are convenient to carry, the plurality of lithium iron phosphate batteries are clamped through the clamping grooves and the clamping strips, the plurality of lithium iron phosphate batteries are convenient to disassemble and assemble, and the temperature sensor is arranged in the barrel body, so that the temperature sensor is convenient to use. And the cylinder body is timely cooled, so that the use safety of the battery is improved.

Description

Technical Field

[0001] This utility model belongs to the field of lithium iron phosphate battery technology, and more specifically, it relates to a low-temperature lithium iron phosphate battery pack. Background Technology

[0002] Lithium iron phosphate (LFP) batteries are one type of energy source. They are lithium-ion batteries that use lithium iron phosphate as the positive electrode material and carbon as the negative electrode material. LFP batteries have advantages such as high operating voltage, high energy density, long cycle life, good safety performance, low self-discharge rate, and no memory effect. When using LFP batteries, multiple batteries are usually combined to form a battery pack. However, this often results in a large battery pack that is inconvenient to carry and install, leading to poor performance. To facilitate portability, some manufacturers space the batteries too close together or place them tightly against each other, which hinders heat dissipation and can easily cause safety accidents. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a lithium iron phosphate low-temperature battery pack that is easy to carry, convenient to disassemble and install, and highly safe.

[0004] To achieve the above technical objectives, the technical solution adopted by this utility model of lithium iron phosphate low-temperature battery pack is as follows:

[0005] A lithium iron phosphate (LFP) low-temperature battery pack includes a cylindrical body with a top cover on its surface and a bottom cover at its bottom. A circuit board is located at the top of the inner part of the cylindrical body and is electrically connected to a battery assembly disposed within the cylindrical body. The battery assembly includes a tail plate with a tail plate retaining strip on its end face. A battery insert is engaged with the tail plate retaining strip. One side of the battery insert has a slot, and the other side has a retaining strip. The slot connects to the tail plate retaining strip. The top battery insert is connected to a top plate. A top plate retaining groove is formed on the inner side of the top plate to engage with the battery insert. Lithium iron phosphate (LFP) batteries are disposed between the tail plate and the battery insert, between multiple battery inserts, and between the top battery insert and the top plate. Each LFP battery has a terminal post, and the terminals of adjacent LFP batteries are connected by a connecting piece. The bottom cover includes an upper plate and a lower plate that are nested together, with a space between them. The upper plate has multiple battery heat dissipation holes on its surface, and the lower plate has a micro fan on its surface.

[0006] Preferably, the inner wall of the cylinder is provided with a groove, and a heat insulation layer is provided in the groove.

[0007] Preferably, the insulation layer is a hydrogel heat-absorbing insulation layer.

[0008] Preferably, a temperature sensor is provided in the middle of the bottom of the circuit board.

[0009] Preferably, the top cover has sleeves on both sides, and the sleeves have lifting rings inside.

[0010] Preferably, the top cover has fixing grooves on both sides, and the fixing grooves are coated with adhesive for connecting sleeves.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention maximizes the use of cylindrical space by vertically stacking multiple lithium iron phosphate batteries inside a cylinder, making the entire battery structure cylindrical. The batteries are also designed for easy portability. Multiple lithium iron phosphate batteries are connected via slots and clips, facilitating easy disassembly and installation and improving the flexibility of battery application. A temperature sensor is installed inside the cylinder to dissipate heat and enhance battery safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the battery assembly in this utility model;

[0016] Figure 4 This is a schematic diagram of the bottom cover of this utility model.

[0017] In the diagram: 1. Cylinder body; 2. Top cover; 3. Bottom cover; 4. Circuit board; 5. Tail plate; 6. Tail plate retaining strip; 7. Battery insert plate; 8. Slot; 9. Retaining strip; 10. Top plate; 11. Top plate slot; 12. Lithium iron phosphate battery; 13. Terminal post; 14. Connecting piece; 15. Battery heat dissipation hole; 16. Miniature fan; 17. Groove; 18. Thermal insulation layer; 19. Sleeve; 20. Lifting ring. Detailed Implementation

[0018] 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.

[0019] like Figure 1 — Figure 4As shown, a lithium iron phosphate low-temperature battery pack includes a cylindrical body 1, a top cover 2 on the surface of the cylindrical body 1, a bottom cover 3 on the bottom, and a circuit board 4 at the top inside. A temperature sensor is located in the middle of the bottom of the circuit board 4. The circuit board 4 is electrically connected to a battery assembly disposed inside the cylindrical body 1. The battery assembly includes a tail plate 5, a tail plate retaining strip 6 on the end face of the tail plate 5, and a battery insert plate 7 that is snapped onto the surface of the tail plate retaining strip 6. The battery insert plate 7 has a slot 8 on one side and a retaining strip 9 on the other side. The slot 8 is connected to the tail plate retaining strip 6, and the battery insert plate 7 at the top is connected to a top plate 10. The top plate 10 has a top plate slot 11 on its inner side that engages with the battery insert 7. Lithium iron phosphate batteries 12 are installed between the tail plate 5 and the battery insert 7, between multiple battery inserts 7, and between the top battery insert 7 and the top plate 10. Each lithium iron phosphate battery 12 has a terminal post 13, and adjacent terminals 13 of the lithium iron phosphate batteries 12 are connected by a connecting piece 14. The bottom cover 3 includes an upper plate and a lower plate that are nested together, with a space between them. The upper plate has multiple battery heat dissipation holes 15 on its surface, and the lower plate has a miniature fan 16 on its surface. Multiple through holes communicating with the outside are provided at the connection between the upper and lower plates.

[0020] The inner wall of the cylinder 1 is provided with a groove 17, and a heat insulation layer 18 is provided in the groove 17. The heat insulation layer 18 is a hydrogel heat-absorbing and heat-insulating layer. By setting the heat insulation layer, the properties of hydrogel are utilized to keep the inside of the cylinder at a low temperature.

[0021] Both sides of the top of the top cover 2 are provided with sleeves 19, and the sleeves 19 are provided with lifting rings 20. Both sides of the top cover 2 are provided with fixing grooves, and the fixing grooves are coated with glue for connecting the sleeves 19.

[0022] In the production process of this utility model, the heat insulation layer 18 is installed in the groove 17 inside the cylinder 1, and then the battery assembly that has been snapped together is installed into the cylinder 1. Finally, the top cover 2 and the bottom cover 3 are installed to both ends of the cylinder 1 with glue and slots to achieve a seal for the cylinder 1. The battery assembly is snapped into the power socket 7 by the tail plate clip 6 of the tail plate 5 to form an installation space for the lithium iron phosphate battery 12. Adjacent battery sockets 7 are snapped together by the slots 8 and clips 9. The lithium iron phosphate battery 12 is placed in the installation space formed by the battery sockets 7. The clip 9 of the top battery socket 7 is snapped into the top plate slot 11. The lithium iron phosphate battery 12 is placed in the installation space formed by the top battery socket 7 and the top plate 10. During use, the temperature sensor detects the temperature inside the cylinder 1. When the temperature exceeds the set temperature, the micro fan 16 is activated to dissipate heat from the cylinder 1 to prevent the temperature from rising too early and causing danger.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lithium iron phosphate low-temperature battery pack, comprising a cylinder, the surface of the cylinder is provided with a top cover, the bottom is provided with a bottom cover, and the inner top end is provided with a circuit board, the circuit board is electrically connected with a battery assembly arranged in the cylinder, characterized in that: The battery assembly comprises a tail plate, the tail plate is provided with a tail plate clamping strip on the end face, the surface of the tail plate clamping strip is clamped with a battery plug plate, one side of the battery plug plate is provided with a clamping groove, the other side is provided with a clamping strip, the clamping groove is connected with the tail plate clamping strip, the top end of the battery plug plate is connected with a top plate, the inner side of the top plate is provided with a top plate clamping groove clamped with the battery plug plate, a lithium iron phosphate battery is arranged between the tail plate and the battery plug plate, between the plurality of battery plug plates and between the top end battery plug plate and the top plate, a pole is arranged on the lithium iron phosphate battery, the poles of adjacent lithium iron phosphate batteries are connected through a connecting piece, the bottom cover comprises an upper layer plate and a lower layer plate which are sleeved with each other, a space is left between the upper layer plate and the lower layer plate, a plurality of battery heat dissipation holes are formed in the surface of the upper layer plate, and a micro fan is arranged on the surface of the lower layer plate.

2. The lithium iron phosphate low temperature battery of claim 1, wherein: The inner wall of the barrel is provided with a groove, and the groove is provided with a temperature insulation layer.

3. The lithium iron phosphate low temperature battery of claim 2, wherein: The temperature insulation layer is a hydrogel heat absorption temperature insulation layer.

4. The lithium iron phosphate battery of claim 1, wherein: A temperature sensor is arranged in the middle of the bottom of the circuit board.

5. The lithium iron phosphate battery of claim 1, wherein: Sleeves are arranged on both sides of the top of the top cover, and lifting rings are arranged in the sleeves.

6. The lithium iron phosphate battery of claim 5, wherein: Fixing grooves are arranged on both sides of the top cover, and glue for connecting the sleeves is coated in the fixing grooves.

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