CN102569936A - Flexible packaging battery module - Google Patents

Abstract

The invention provides a flexible packaging battery module, which comprises aluminium radiating plates, a battery connector and ABS (acrylonitrile butadiene styrene) cleat insulators, wherein the battery module comprises two ABS cleat insulators, 15 aluminium radiating plates and 14 flexible packaging single batteries. A flexible packaging battery pack, provided by the invention, is cooled by the aluminium radiating plates and the overall structure is adopted to quickly refrigerate, so as to achieve the purpose of prolonging the service life of the battery due to good radiating effect.

Description

A kind of flexible packaging battery module

technical field

The invention relates to a battery, in particular to a soft package battery module.

Background technique

Most of the existing battery cell structures are a plurality of soft-packaged batteries connected in parallel, and then arranged in a hard insulating casing. The upper part of the casing is provided with a positive terminal and a negative terminal. The positive tabs of the soft-packaged batteries are connected to each other and set on the positive terminal of the casing. The negative tabs of the flexible-packaged batteries are connected to each other and set on the negative terminal of the casing. This battery structure is the basis for designing a battery box. structure and connections. On the one hand, the battery designed in this way makes it difficult to dissipate the heat of the soft-packed battery in the hard shell, and on the other hand, it is difficult to monitor the temperature inside the plastic-sealed battery. The parallel management system collects only the battery characteristic data after parallel connection, and it is difficult to control the parameters of each battery, which makes it easy to explode and cause safety accidents.

The existing structure based on soft-packaged batteries is packaged in a battery box with plastic, without a cooling and heat dissipation system, the heat dissipation effect of the battery is poor, and it is difficult to ensure the safe use of the battery in various environments.

The current battery heat dissipation generally adopts cooling methods such as air cooling. In this direct cooling method, a certain gap needs to be left between the batteries to form a cooling channel for the cooling medium to take away the heat generated by the battery through the surface of the battery. Due to the characteristics of its own structure, the existing soft-packaged battery has a relatively soft battery body and irregular aluminum-plastic film packaging edges. The existing technology is difficult to meet the requirements of both positioning and installation and cooling and heat dissipation.

Not only that, but the battery connector also has the following defects.

The connection between batteries is the key technology for battery grouping. At present, the connection methods of batteries include welding and screw connection. Welding includes ultrasonic welding and laser welding. Good control. Laser welding costs are too high. Screws are used to directly connect the battery tabs together, and there is no fixing method. When the battery box vibrates, the connection will be ineffective and a safety accident will occur.

The battery groups in the prior art are generally fixed with steel plates and long bolts. The steel plates are conductors and non-insulating, and are connected to the battery box, which may easily cause the entire battery box to be electrified and cause a short circuit accident. Due to the connection between the batteries, the height of the steel plate is much smaller than the top of the battery. As a result, the data acquisition line of the internal management system of the battery box cannot use the steel plate to form a wire slot, and cannot be fixed, leading to confusion.

Contents of the invention

In view of the above-mentioned defects in the prior art, the object of the present invention is to provide a soft package battery module which has a good heat dissipation effect and can prolong the service life of the battery. The battery module includes heat-dissipating aluminum plates, battery connectors, and ABS insulating splints. The soft-packed battery module includes two ABS insulating splints, 15 heat-dissipating aluminum plates, and 14 flexible-packaged single batteries.

In the first preferred embodiment of the present invention: the heat dissipation aluminum plate and the ABS insulation splint are provided with 1-4 corresponding mounting holes with a diameter of 4-8 mm in the direction perpendicular to the plate, and the single battery An axially vertical pull rod fixes the heat dissipation aluminum plate and the ABS insulating splint through the mounting hole.

In the second preferred embodiment of the present invention: one side of the heat dissipation aluminum plate is provided with a groove for fixing the single battery;

The battery connector plate 1 and plate 5 are located at the end of the battery lug, perpendicular to the axial direction of the single battery, and fixed with bolts parallel to the axial direction of the battery;

The heat dissipation aluminum plate and the two ABS insulating splints are axially parallel to the single battery, and the ABS insulating splints are located on both sides of the battery module.

In the third preferred embodiment of the present invention: the contact surface between the groove provided on the heat dissipation aluminum plate and the single battery is provided with a long strip-shaped phase-change material storage tank in the same axial direction as the battery, and the phase-change material storage tank is The phase change material is placed in the tank. The phase change material is selected according to the suitable temperature range for battery operation. The temperature range is 25-35°C. The phase change material is an inorganic solid-liquid or inorganic solid-solid phase change material or an organic solid phase change material. - Solid phase change materials.

In the fourth preferred embodiment of the present invention: the groove provided on the heat dissipation aluminum plate is set at one end of the heat dissipation aluminum plate, and the other end of the heat dissipation aluminum plate is provided with 1-2 through holes.

In the fifth preferred embodiment of the present invention: the contact surface between the groove provided on the heat dissipation aluminum plate and the single battery is coated with thermal conductive silica gel.

In the sixth preferred embodiment of the present invention: the battery connector plate 1 and the plate 5 are made of red copper; the battery connector plate 1 is provided with a groove for stacking the battery tabs, and the The groove is provided with a fixing hole with a diameter of 7-9 mm; the battery connector plate 5 is located on the side close to the tab of the single battery, and is provided with a fixing hole with a diameter of 7-9 mm.

In the seventh preferred embodiment of the present invention: the opening ends of the ABS insulating splints located on both sides of the battery module are on the same axis as the tabs of the single battery; the opening ends of the ABS insulating splints are provided with Open, semi-open square grooves and U-shaped grooves.

In the eighth preferred embodiment of the present invention: the ABS insulating splint includes an ABS board 1, an ABS board 2, an ABS board 3 and an ABS board 4;

The open ends of the ABS board 1 and the ABS board 3 are provided with an open square groove, a semi-open square groove and a U-shaped groove;

The open end of the ABS board 2 is provided with two open slots and a U-shaped slot;

The open end of the ABS board 4 is provided with two half-open slots and a U-shaped slot;

The U-shaped slot is located between two open or semi-open square slots.

In the ninth preferred embodiment of the present invention: the combination of the ABS insulating splints on both sides of the flexible package battery module is ABS board 2 and ABS board 1 or ABS board 2 and ABS board 3 or ABS board 2 and ABS board 4;

The opening directions of the semi-open square grooves of the ABS board 1 , the ABS board 3 and the ABS board 4 are all facing the soft package battery module.

Description of drawings

Fig. 1 is: a schematic structural diagram of a battery module provided by the present invention;

Fig. 2 is a schematic diagram of the structure of a flexible packaged single battery;

Fig. 3 is: a structural schematic diagram of Embodiment 1 of the heat dissipation aluminum plate provided by the present invention;

FIG. 4 is a schematic structural view of Embodiment 2 of the heat dissipation aluminum plate provided by the present invention;

FIG. 5 is a schematic structural view of Embodiment 3 of the heat dissipation aluminum plate provided by the present invention;

FIG. 6 is a schematic structural view of Embodiment 4 of the heat dissipation aluminum plate provided by the present invention;

FIG. 7 is a schematic cross-sectional view of Embodiment 4 of the heat dissipation aluminum plate provided by the present invention;

FIG. 8 is a schematic structural view of the battery connector plate 1 provided by the present invention;

FIG. 9 is a schematic structural view of the battery connector plate 5 provided by the present invention;

Fig. 10 is: the schematic structural view of the ABS insulating splint 1 provided by the present invention;

Fig. 11 is: the structural schematic diagram of the ABS insulating splint 2 provided by the present invention;

Fig. 12 is: the schematic structural view of the ABS insulating splint 3 provided by the present invention;

FIG. 13 is a schematic structural view of the ABS insulating splint 4 provided by the present invention.

Detailed ways

A flexible package battery module provided by the present invention has a specific structure as shown in Figure 1. It can be seen from Figure 1 that the flexible package battery module includes 15 heat dissipation aluminum plates, battery connectors and 2 ABS insulating splints. The body batteries are combined to form a soft-packed battery module. The specific structure of the soft-packed single battery is shown in Figure 2. From Figure 2, it can be seen that the shape of the soft-packed single battery is a cuboid, the outer layer is aluminum-plastic film packaging, and the top has two poles. Ears are positive and negative ears respectively.

The heat dissipation aluminum plate is made of industrial pure aluminum, which has good thermal conductivity and certain hardness. The first embodiment of its structure is shown in Figure 3. It can be seen from Figure 3 that there is a groove on one side of the heat dissipation aluminum plate. The depth matches the part below the tab of the single battery. The groove plays the role of positioning the single battery. The heating surface of the battery is closely attached to the surface of the groove, which is conducive to the heat dissipation of the battery. There is also a vertical direction between the heat dissipation aluminum plate and the plate. 1-4 mounting holes, the diameter of the mounting holes is 4-8 mm, and the tie rods connect and fix the plurality of heat-dissipating aluminum plates containing the single battery with the ABS insulating splint and the fixed L plate through these mounting holes.

There is a through hole on the side of the heat dissipation aluminum plate without a groove. The through hole is parallel to the axial direction of the single battery, and the direction is opposite. The number of through holes is 1-2, and the height is 5-10 cm. Embodiment 1 of the aluminum plate is that the heat dissipation aluminum plate is provided with a groove on the side of one end close to the battery tab, and two through holes are provided at the other end.

Fig. 4 is a schematic structural diagram of Embodiment 2 of the heat dissipation aluminum plate provided by the present invention. It can be seen from Fig. 4 that the end of the heat dissipation aluminum plate near the battery tab is provided with a through hole, and the side of the other end is provided with a groove.

Further, the contact surface between the groove provided on the heat-dissipating aluminum plate and the single battery is coated with heat-conducting silica gel, which plays a role in accelerating heat conduction. Its specific structure is shown in Figure 5, which is an embodiment of the heat-dissipating aluminum plate provided by the present invention The schematic diagram of the structure of the third, as can be seen from Figure 5, a groove is provided on the side of the heat dissipation aluminum plate near the battery tab, and two through holes are provided at the other end, and the contact surface between the groove and the single battery is coated with thermal silica gel.

Preferably, the structure schematic diagram of Embodiment 4 of the heat dissipation aluminum plate provided by the present invention is shown in Figure 6. It can be seen from Figure 6 that a groove is provided on one side of the heat dissipation aluminum plate, and a phase change material storage is provided on the contact surface between the groove and the single battery. The cross-sectional schematic diagram of the tank is shown in Figure 7. It can be seen from Figure 7 that the storage tank for the phase change material is a strip-shaped tank with the same axial direction as the battery, and the phase change material is placed in the storage tank for the phase change material. The phase change material can be When the battery is working, it absorbs the heat generated by the battery through the phase change. The selection of the phase change material can be based on the suitable temperature range of the battery. The phase change temperature range of the phase change material is 25 ~ 35 ℃. Solid-solid phase change materials, organic solid-solid phase change materials. Placing the phase-change material in the storage tank of the phase-change material can make the temperature distribution among the single batteries uniform, improve the consistency among the batteries, and do not need external cooling devices such as fans.

The battery connector is made of red copper, and Fig. 8 and Fig. 9 are the specific structural schematic diagrams of the battery connector board 1 and board 5 respectively.

Plate 1 is a battery lug connector, located at one end of the battery module lug, and perpendicular to the axial direction of the single battery, for connecting the single battery. As can be seen from Figure 8, the plate 1 is provided with a rectangular groove, which is used to stack the tabs of the single battery, the depth of the groove is 2-5 mm, and the groove is provided with two fixing holes perpendicular to the groove, the holes The hole diameter is 7-9 mm, through which the bolt connects the plate 1 with the lugs of all the single cells in the soft package battery module. There is also a positioning hole on the battery lug connector plate 1. The positioning hole is a hole on the connector that is not in the groove. The hole diameter is 5-7 mm. The bolts pass through the positioning hole to fix the plate 1 on the ABS insulating splint. .

Plate 5 is a fastening connector. As can be seen from Figure 9, there is a round hole in the middle of the battery connector with a diameter of 7-9 mm. There are threads in the hole, which are connected with hexagonal bolts. The hexagonal bolts and plate 5 will be stacked on the battery. The battery lug in the groove of the tab connector plate 1 is closely connected with the battery tab connector plate 1, and the diameter of the round hole in the middle of the plate 5 matches the aperture of the fixing hole of the battery tab connector plate 1 .

In a specific implementation, plate 1 is used to connect all stacked battery tabs in a battery module to the adjacent ABS insulation splint, and plate 5 is used to connect the battery tabs stacked in the groove of the battery tab connector to the adjacent ABS insulation splint. The battery tab connectors are tightly connected.

The ABS insulation splint is made of ABS (Acrylonitrile Butadiene Styrene, acrylonitrile-styrene-butadiene copolymer) material, as shown in Figure 10-Figure 13, respectively, ABS board 1, ABS board 2, ABS board 3, ABS board 4 Schematic diagram of the specific structure, the open end of the ABS insulating splint is the end of the battery tab.

It can be seen from Figure 10 and Figure 12 that the open ends of ABS board 1 and ABS board 3 are provided with an open square groove, a semi-open square groove and a U-shaped groove; it can be seen from Figure 11 that there are two open ends of ABS board 2 Open slot and a U-shaped slot; As can be seen from Figure 13, the open end of the ABS board 4 is provided with two half-open slots and a U-shaped slot. The U-shaped groove is located between two open or semi-open square grooves, and is used as a wire groove for collecting lines such as voltage, current, and temperature. A positioning hole parallel to the axial direction of the single battery is respectively provided in the open square groove and the semi-open square groove. The diameter of the hole is 5-7 mm. The apertures of the holes match, and the bolts pass through the positioning holes of the battery lug connector plate 1 and the positioning holes in the opening of the ABS insulating splint and the half-opened square groove to fix the battery lug connector plate 1 on the ABS insulating splint. The ABS insulation splint is parallel to the axial direction of the single battery, and there are 1-4 mounting holes perpendicular to the plate. The diameter of the mounting hole is 4-8 mm. The tie rods connect the battery pack together through these mounting holes.

Further, the combination of the ABS insulating splints at both ends of a flexible package battery module provided by the present invention can be ABS board 2 and ABS board 1, ABS board 2 and ABS board 3, and ABS board 2 and ABS board 4, and includes half-open The opening directions of the semi-open square grooves of the ABS board 1 , the ABS board 3 and the ABS board 4 of the square groove all face the battery module.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation of the present invention can still be carried out. Any modification or equivalent replacement without departing from the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

Claims (10)

1. A flexible packaged battery module, said battery module comprising a heat dissipation aluminum plate, a battery connector and an ABS insulating splint, characterized in that said soft packaged battery module comprises two said ABS insulating splints, and the number is 15 said heat dissipation aluminum plates , the number is 14 soft-packed single batteries. 2. A flexible package battery module according to claim 1, characterized in that the heat dissipation aluminum plate and the ABS insulating splint are provided with 1-4 corresponding mounting holes with a diameter of 4-8 mm in the direction perpendicular to the plate, The pull rod perpendicular to the axial direction of the single battery fixes the heat dissipation aluminum plate and the ABS insulating splint through the installation hole. 3. A flexible package battery module according to claim 1, characterized in that a groove for fixing the single battery is provided on one side of the heat dissipation aluminum plate; The battery connector plate 1 and plate 5 are located at the end of the battery lug, perpendicular to the axial direction of the single battery, and fixed with bolts parallel to the axial direction of the battery; The heat dissipation aluminum plate and the two ABS insulating splints are axially parallel to the single battery, and the ABS insulating splints are located on both sides of the battery module. 4. A flexible package battery module according to claim 3, characterized in that the contact surface between the groove provided on the heat dissipation aluminum plate and the single battery is provided with a long strip-shaped phase-change material storage tank in the same axial direction as the battery, A phase change material is placed in the storage tank of the phase change material. The phase change material is selected according to the suitable temperature range for battery operation. The temperature range is 25-35°C. The phase change material is inorganic solid-liquid or inorganic solid-solid Phase change materials or organic solid-solid phase change materials. 5. A soft package battery module according to claim 3, characterized in that the groove provided on the heat dissipation aluminum plate is set at one end of the heat dissipation aluminum plate, and the other end of the heat dissipation aluminum plate is provided with 1-2 through holes. 6. A soft package battery module according to claim 5, characterized in that the contact surface between the groove provided on the heat dissipation aluminum plate and the single battery is coated with thermal conductive silica gel. 7. A soft package battery module according to claim 3, characterized in that said battery connector board 1 and board 5 are made of red copper; said battery connector board 1 is provided with tabs for stacking said single cells groove, the groove is provided with a fixing hole with a diameter of 7-9 mm; hole. 8. A soft package battery module according to claim 1, characterized in that the opening ends of the ABS insulation splints located on both sides of the battery module are on the same axis as the tabs of the single battery; The open end of the insulating splint is provided with open, semi-open square grooves and U-shaped grooves. 9. A flexible package battery module according to claim 8, characterized in that said ABS insulating splint comprises ABS board 1, ABS board 2, ABS board 3 and ABS board 4; The open ends of the ABS board 1 and the ABS board 3 are provided with an open square groove, a semi-open square groove and a U-shaped groove; The open end of the ABS board 2 is provided with two open slots and a U-shaped slot; The open end of the ABS board 4 is provided with two half-open slots and a U-shaped slot; The U-shaped slot is located between two open or semi-open square slots. 10. A soft-package battery module according to claim 9, characterized in that the combination of ABS insulating splints on both sides of the soft-package battery module is ABS board 2 and ABS board 1 or ABS board 2 and ABS board 3 or ABS board 2 and ABS board 4; The opening directions of the semi-open square grooves of the ABS board 1 , the ABS board 3 and the ABS board 4 are all facing the soft package battery module.

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