CN211404560U

CN211404560U - Flexible package polymer lithium battery pack with improved structure

Info

Publication number: CN211404560U
Application number: CN201922119846.8U
Authority: CN
Inventors: 尚亚婷; 肖军
Original assignee: Shenzhen Huixinli Electronic Technology Co ltd
Current assignee: Shenzhen Huixinli Electronic Technology Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-09-01
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses a flexible package polymer lithium battery pack with an improved structure, which comprises a fixed frame, a lithium battery, a junction box base and a radiating fin, the fixing frame comprises a silica gel plate, a base and an aluminum plastic film, the base is a rectangular plate with square grids uniformly distributed, the base is made of PPS engineering plastic, the width of the square grids of the base is larger than the diameter of the lithium battery, round holes are formed in the middle of the square grids of the base, the space between the square grids is smaller than the diameter of the lithium battery, the silica gel plate is used as the partition board of the lithium battery, so that the lithium battery pack has the functions of shock resistance, insulation and heat conduction, therefore, the problem of one battery can not affect other batteries, the upper box seat and the lower box seat have good sealing performance by the rubber sealing and the heat-conducting silicone grease filling, and the temperature on the circuit board can be transmitted to the radiating fin by the heat conduction silicone grease, so that the temperature of the PCB can be well dissipated.

Description

Flexible package polymer lithium battery pack with improved structure

Technical Field

The utility model relates to a polymer lithium cell group specifically is a flexible package polymer lithium cell group of improvement structure.

Background

With the progress and development of science and technology, lithium batteries are now indispensable new energy in various fields of national economy, and according to the classification of the external packages of lithium batteries, the lithium batteries can be divided into hard shell lithium batteries and soft package lithium batteries, the hard shell lithium batteries mainly comprise steel shell lithium batteries and plastic shell lithium batteries, and the soft package lithium batteries mainly comprise aluminum plastic film soft package lithium batteries and special-shaped soft package lithium batteries. The tab of the flexible package lithium battery is usually a metal sheet with good conductivity, such as a nickel strip, a copper strip, an aluminum strip and the like, the battery tab and the battery tab are mutually overlapped and then connected when the batteries are connected in parallel or in series, such as tin welding, laser welding, ultrasonic welding and riveting, the connected battery tab is reliably connected and has a stable structure, in the polymer lithium battery, the specific capacity of silicon is the highest of all known negative electrode materials at present, because the silicon-lithium alloy formed in the charging and discharging processes of pure silicon in the lithium battery can enable the negative electrode material to generate huge volume expansion, the volume effect of the negative electrode material can be effectively reduced through silicon-carbon compounding, and meanwhile, the battery pack is packaged, reinforced and bumped and welded by means of a battery box and the like after being grouped, so the battery pack can be applied to products used in various environments. The traditional lithium battery is convenient to use, but has the problems of poor sealing performance, poor heat dissipation performance and the like, and the problems cause the reliability of the lithium battery to be low and even cause dangerousness.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flexible package polymer lithium cell group of improvement structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a flexible package polymer lithium battery pack with an improved structure comprises a fixing frame, lithium batteries, a junction box base and radiating fins, wherein the fixing frame comprises a silica gel plate, a base and an aluminum plastic film, the base is a rectangular plate with square grids uniformly distributed, the base is made of PPS (polyphenylene sulfide) engineering plastic, the width of the square grids of the base is larger than the diameter of the lithium batteries, round holes are formed in the middle of the square grids of the base, the diameter of each round hole is smaller than that of the lithium batteries, grooves are formed among the grids of the base, the silica gel plate is clamped into the vertically-arranged silica gel plate through interference fit in the grooves, the silica gel plate is made of flame-retardant silica gel, the flame-retardant silica gel is silica gel with insulating, shockproof and thermal conductivity, the flame-retardant silica gel is soft in material and has self-adhesive surface, the lithium batteries are positioned in, the silicon-carbon material can effectively reduce the volume effect of the negative electrode material, the positive electrode lug and the negative electrode lug of the lithium battery are both welded, the outer side of the fixing frame is wrapped and arranged in the fixing frame by the aluminum-plastic film, and the aluminum-plastic film has extremely high barrier property, good cold stamping formability, puncture resistance, electrolyte resistance stability and insulativity.

As a further aspect of the present invention: the junction box base comprises an upper box base, a lower box base and a sealing rubber strip, the upper box base and the lower box base are made of PPS plastic, the length and the width of the upper box base and the lower box base are the same as those of the base of the fixing frame, the upper box base and the lower box base are in screw connection through screw holes at four corners, a square groove is formed inwards in the middle of the lower box base, the lower box base is provided with grooves around the square groove and used for placing the sealing rubber strip, the upper box base is provided with a convex groove corresponding to the lower box base, when the upper box base and the lower box base are tightly pressed, the sealing rubber strip is in a compression state and the deformation range is within the compression deformation amount, four positioning support frames are injected in the middle of the lower box base and used for fixedly supporting a PCB, a through hole is formed in the lower left corner of the lower box base and serves as an anode wire inlet, two round holes are formed in the closed rear side faces of the upper box base and the lower box base and serve as a cathode wire inlet and a cathode wire outlet, the wire inlet and the cathode wire outlet are filled with heat-conducting silicone grease, and the upper box base is located above the circuit board and is provided with a hole for filling the heat-conducting silicone grease.

As a further aspect of the present invention: the heat radiating fin is made of aluminum alloy materials, the bottom of the heat radiating fin is a solid plate, the upper portion of the heat radiating fin is a flaky plate perpendicular to the bottom of a plurality of plates, four corners of the heat radiating fin are provided with screw holes corresponding to the upper box base, the size of the bottom of the heat radiating fin corresponds to the plane of the upper box base, the heat radiating fin is connected with the surface of the upper box base through screws, and the middle of the bottom of the heat radiating fin is attached to heat-conducting silicone grease of the upper box base.

Compared with the prior art, the beneficial effects of the utility model are that: make lithium cell group have antidetonation, insulating and heat conduction's effect through the baffle with the silica gel board as the lithium cell to the problem of a battery can not influence other batteries, goes up the box base and fills through rubber seal and heat conduction silicone grease with lower box base and makes whole good leakproofness that has, and the temperature on the circuit board can be transmitted to the fin by heat conduction silicone grease in addition, thereby the temperature of dispelling the PCB board that can be fine.

Drawings

Fig. 1 is a schematic diagram of a flexibly packaged polymer lithium battery pack with an improved structure.

Fig. 2 is a schematic top view of a base in a flexibly packaged polymer lithium battery pack of improved structure.

Fig. 3 is a schematic structural diagram of a junction box base lower base in a flexibly packaged polymer lithium battery pack with an improved structure.

As shown in the figure: 1. a lithium battery; 2. a fixed mount; 3. a silica gel plate; 4. a lower box base; 5. an upper box base; 6. a negative wire inlet; 7. an outlet; 8. a heat sink; 9. a tab; 10. a positive wire inlet; 11. sealing the rubber strip; 12. positioning a support frame; 13. a base; 14. and (3) an aluminum plastic film.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, in the embodiment of the present invention, a flexible package polymer lithium battery pack with an improved structure comprises a fixing frame 2, a lithium battery 1, a terminal box base and a heat sink 8, wherein the fixing frame 2 comprises a silicon rubber plate 3, a base 13 and an aluminum plastic film 14, the base 13 is a rectangular plate with square grids uniformly distributed, the base 13 is made of PPS engineering plastic, the width of the square grid of the base 13 is larger than the diameter of the lithium battery 1, round holes are formed in the middle of the square grid of the base 13 and are smaller than the diameter of the lithium battery 1, grooves are formed between each grid of the base 13, the silicon rubber plate 3 vertically placed is clamped in the grooves through interference fit, the silicon rubber plate 3 is made of flame-retardant silicon rubber, the flame-retardant silicon rubber is silicon rubber with insulating, shockproof and thermal conductivity, the material of the flame-retardant silicon rubber is soft, the surface of the lithium battery 1 is sticky, the lithium battery 1 is located, the negative electrode tab 9 of the lithium battery 1 is made of a silicon-carbon composite material, the silicon-carbon composite material can effectively reduce the volume effect of the negative electrode material, the positive electrode tab 9 and the negative electrode tab 9 of the lithium battery 1 are both welded, the outer side of the fixing frame 2 is wrapped and arranged by the aluminum-plastic film 14, and the aluminum-plastic film 14 has high barrier property, good cold stamping formability, puncture resistance, electrolyte resistance stability and insulation property.

The junction box base comprises an upper box base 5, a lower box base 4 and a sealing rubber strip 11, wherein the upper box base 5 and the lower box base 4 are made of PPS plastic, the length and the width of the upper box base 5 and the lower box base 4 are the same as those of a base 13 of a fixed frame 2, the upper box base 5 and the lower box base 4 are in screw connection through screw holes at four corners, a square groove is inwards formed in the middle of the lower box base 4, the lower box base 4 is provided with a groove around the square groove and used for placing the sealing rubber strip 11, the upper box base 5 is provided with a convex groove corresponding to the lower box base 4, when the upper box base 5 and the lower box base 4 are tightly pressed, the sealing rubber strip 11 is in a compression state and the deformation range is within the compression deformation amount, four positioning support frames 12 are injected in the middle of the lower box base 4 and used for fixedly supporting a PCB, a through hole is formed in the lower left corner of the lower box base 4 and used as an anode wire inlet 10, two round holes are formed in the closed rear side surfaces of the upper box base 5 and the, the wire inlet and the wire outlet 7 are filled with heat-conducting silicone grease, and the upper box base 5 is provided with a hole above the circuit board and filled with heat-conducting silicone grease.

The radiating fin 8 is made of aluminum alloy materials, the bottom of the radiating fin 8 is a solid plate, the upper portion of the radiating fin 8 is a plurality of sheet-shaped plates perpendicular to the bottom, four corners of the radiating fin 8 are provided with screw holes corresponding to the upper box base 5, the size of the bottom of the radiating fin 8 corresponds to the plane of the upper box base 5, the radiating fin 8 is connected with the surface of the upper box base 5 through screws, and the middle of the bottom of the radiating fin 8 is attached to heat-conducting silicone grease of the upper box base 5.

The utility model discloses a theory of operation is: through

base

13 and 3 fixed lithium cell 1 of silica gel plate in the mount 2, silica gel plate 3 is as lithium cell 1's baffle, can reach the insulating and heat conduction effect of taking precautions against earthquakes between the messenger lithium cell 1, go up box holder 5 and box holder 4 down and make lithium cell 1 have good waterproof performance through rubber seal, go up box holder 5 and box holder 4 down and pack heat conduction silicone grease except that having sealed effect can also heat conduction, with the temperature transmission and the fin 8 of group battery, the fin 8 makes the group battery reach good heat dissipation's characteristics through outside air-cooling.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a flexible package polymer lithium cell group of improvement structure, including mount (2), lithium cell (1), terminal box seat and fin (8), a serial communication port, mount (2) are including silica gel board (3), base (13), plastic-aluminum membrane (14), base (13) are the rectangular plate of equipartition square grid, the material of base (13) is PPS engineering plastics, the square grid width of base (13) is greater than the diameter of lithium cell (1), open the diameter that the round hole just was less than lithium cell (1) between in the middle of the square grid of base (13), go into silica gel board (3) of vertical placement through interference fit card in recess and the recess between base (13) every grid, the material of silica gel board (3) is fire-retardant silica gel, its material is soft and the surface is from taking viscidity, lithium cell (1) are located in the several square check that mount (2) and silica gel board (3) are constituteed and lithium cell (1) negative pole ear (9) are located bottom plate ( On one side, negative pole ear (9) of lithium cell (1) are silicon carbon composite material, and silicon carbon material can effectually reduce the volume effect of negative pole material, and positive pole ear (9) and negative pole ear (9) of lithium cell (1) are all welded, and mount (2) outside is wrapped up in by plastic-aluminum membrane (14) and interior.

2. The improved structure of the flexibly packaged polymer lithium battery pack as claimed in claim 1, wherein the terminal box base comprises an upper box base (5), a lower box base (4) and a sealing rubber strip (11), the upper box base (5) and the lower box base (4) are made of PPS plastic, the length and width of the upper box base (5) and the lower box base (4) are the same as those of the base (13) of the fixing frame (2), the upper box base (5) and the lower box base (4) are connected by screws through screw holes at four corners, a square groove is formed inwards in the middle of the lower box base (4), the lower box base (4) is provided with grooves around the square groove for placing the sealing rubber strip (11), the upper box base (5) is provided with convex grooves corresponding to the lower box base (4), and when the upper box base (5) and the lower box base (4) are pressed, the sealing rubber strip (11) is in a compressed state and deforms within a compression deformation range, four positioning support frames (12) are injected in the middle of the lower box base (4) and used for fixedly supporting a PCB, a through hole is formed in the lower left corner of the lower box base (4) and serves as an anode wire inlet (10), two round holes are formed in the closed rear side faces of the upper box base (5) and the lower box base (4) and serve as a cathode wire inlet (6) and a wire outlet (7), the wire inlet and the wire outlet (7) are filled with heat-conducting silicone grease, and the upper box base (5) is located above the circuit board and is provided with holes to be filled with the heat-conducting silicone grease.

3. The improved structure of the lithium polymer battery pack with the flexible package according to claim 1, wherein the heat sink (8) is made of aluminum alloy, the bottom of the heat sink (8) is a solid plate, the upper portion of the heat sink (8) is a plurality of plate-shaped plates perpendicular to the bottom, four corners of the heat sink (8) are provided with screw holes corresponding to the upper case base (5), the size of the bottom of the heat sink (8) corresponds to the plane of the upper case base (5), the heat sink (8) is connected with the surface of the upper case base (5) through screws, and the middle of the bottom of the heat sink (8) is attached to the heat conductive silicone grease of the upper case base (5).