CN102544406A - Flexibly-packaged battery module group - Google Patents

Abstract

The invention provides a flexible package battery module set, the soft package battery module set includes a heat dissipation aluminum plate, a battery connector, an ABS insulating splint, a fixed L plate, an insulating piece and a box body, the battery module set includes a battery module, and the battery module includes two pieces of ABS Insulating splints, 15 heat-dissipating aluminum plates, and 14 soft-packed single batteries. The flexible packaging battery module set provided by the present invention is cooled by a heat-dissipating aluminum plate, and the whole structure can be refrigerated quickly, and the good heat-dissipating effect can achieve the purpose of prolonging the service life of the battery.

Description

A kind of flexible packaging battery module group

technical field

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

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 pack which has good heat dissipation effect and can prolong the service life of the battery. The flexible package battery module group includes a heat dissipation aluminum plate, a battery connector, an ABS insulating splint, a fixed L plate, an insulating piece, and a box body. The battery module includes two ABS insulating splints, and the number of the heat dissipation aluminum plates is 15. 14 single cells in flexible packaging.

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 installation hole.

In the second preferred embodiment of the present invention: the battery connector is made of red copper, and is perpendicular to the axis of the single battery; the battery connector plate 1 is provided with a stacked battery tab Groove and a positioning hole with an aperture of 4-8 mm, the groove is provided with two fixing holes with an aperture of 7-9 mm; the battery connector plate 5 is located on the side close to the tab of the single battery , which is provided with a fixing hole with a diameter of 7-9 mm;

The battery connector plate 2 is provided with a groove for stacking the battery tabs and two positioning holes with an aperture of 4-8 mm, and the groove is provided with a fixing hole with an aperture of 7-9 mm;

The battery connector plate 6 is provided with two symmetrically arranged grooves for stacking tabs and a positioning hole with an aperture of 4-8 mm, and each groove is provided with a fixing hole with an aperture of 7-9 mm;

The battery connector plate 7 is provided with a groove for stacking the battery tabs and a positioning hole with a diameter of 4-8 mm, and the groove is provided with a fixing hole with a diameter of 7-9 mm.

In the third preferred embodiment of the present invention: the heat dissipation aluminum plate is parallel to the axial direction of the unit battery, and a groove for fixing the unit battery is provided on one side of the heat dissipation aluminum plate; the groove and the unit battery The contact surface of the battery is provided with a long strip-shaped phase-change material storage tank which is the same as the axial direction of the battery. The 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 25-35°C, and the phase change material is an inorganic solid-liquid or inorganic solid-solid phase change material or an organic solid-solid phase change material.

In the fourth preferred embodiment of the present invention: the groove provided on the heat dissipation aluminum plate is arranged 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, and the groove is connected with the single battery. The contact surface is coated with thermally conductive silicone.

In the fifth preferred embodiment of the present invention: the three ABS insulating splints are parallel to the axial direction of the single battery, and are located in the middle and both sides of the battery module group; The battery lugs are on the same axis; the open end of the ABS insulating splint is provided with openings, half-opening square grooves and U-shaped grooves.

In the sixth 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 seventh preferred embodiment of the present invention: the combination of the ABS insulating splints contained in the flexible packaging battery module group is ABS board 1, ABS board 2 and ABS board 3 or ABS board 4, ABS board 2 and ABS board 3 or ABS board 4. ABS board 2 and ABS board 1;

The ABS board 2 is located in the middle of the flexible package battery module group;

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-packed single battery.

In the eighth preferred embodiment of the present invention: the insulator is a rectangle composed of two mutually convex and concave parts, located at the tab end of the single battery, and its axial direction is perpendicular to the axial direction of the single battery. Positioning holes with a diameter of 5-7 mm are respectively arranged in the axial direction on the above-mentioned convex-concave fitting parts.

Description of drawings

Fig. 1 is: a schematic structural view of a flexible package battery module set 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 2 provided by the present invention;

FIG. 10 is a schematic structural view of the battery connector plate 5 provided by the present invention;

FIG. 11 is a schematic structural view of the battery connector plate 6 provided by the present invention;

FIG. 12 is a schematic structural view of the battery connector plate 7 provided by the present invention;

Fig. 13 is: a schematic structural view of the ABS insulating splint 1 provided by the present invention;

Fig. 14 is: the schematic structural view of the ABS insulating splint 2 provided by the present invention;

Fig. 15 is: the schematic structural view of the ABS insulating splint 3 provided by the present invention;

Fig. 16 is: the schematic structural view of the ABS insulating splint 4 provided by the present invention;

Fig. 17 is: a structural schematic diagram of an insulating member-upper plate provided by the present invention;

Fig. 18 is a schematic diagram of the structure of the insulating member-lower plate provided by the present invention.

Detailed ways

A flexible package battery module set 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 set includes 30 heat-dissipating aluminum plates, battery connectors, 3 ABS insulating splints and insulating parts. Combine 28 soft-packed single batteries to form a flexible-packaged battery module group. The specific structure of the flexible-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, and the outer layer is aluminum-plastic film packaging , with two tabs on the top, namely the positive tab and the negative tab.

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 are 1-4 mounting holes on the heat dissipation aluminum plate. holes, the diameter of the mounting holes is 4-8 mm, and the pull rods connect and fix a 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 at the end without groove on the side of the heat dissipation aluminum plate. 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. The heat dissipation aluminum plate shown in Figure 3 In the first embodiment, 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.

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 phase change material storage tank is a long strip-shaped tank with the same axis as the battery, and the phase change material is placed in the phase change material storage tank. The phase change material can be placed in the 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, as shown in Figure 8 to Figure 12 is a schematic diagram of the specific structure of the battery connector plate 1, plate 2, plate 5, plate 6 and plate 7.

Plate 1, plate 2, plate 6 and plate 7 are battery tab connectors, located at one end of the battery pack tab and perpendicular to the axial direction of the single battery, for connecting the single battery. From Figure 8, Figure 9, Figure 11 and Figure 12, it can be seen that there is one groove on plate 1, plate 2 and plate 7, and two grooves on plate 6, which are used for stacking tabs of single batteries, and the depth of the groove is 2-5 mm, and the slot is provided with at least one fixing hole perpendicular to the slot, the fixing hole diameter is 7-9 mm, and the bolt connects the connector with the tab of the single battery through the hole. The battery lug connector is also provided with at least one positioning hole, which is a hole on the connector that is not in the groove. The diameter of the positioning hole is 5-7 mm. There is one plate 1, plate 6 and plate 7. 2. There are two bolts through the positioning holes to fix the connector on the ABS insulating splint.

Plate 5 is a fastening connector. As can be seen from Figure 10, there is a round hole in the middle of the battery connector with a diameter of 5-7 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 tabs in the grooves of the tab connectors (i.e., battery connector plates 1, 2, 6 and 7) are tightly connected to the battery tab connectors, and the diameter of the round hole provided on the plate 5 is the same as that of the battery poles. The hole diameters of the holes in the grooves of the ear connectors are matched.

In a specific implementation, plate 1 is used for the connection of all stacked battery tabs in a battery module and the adjacent ABS insulating splint; plate 2 is used for the connection of partially stacked battery tabs in a battery module and ABS plate 3 ; Plate 5 is used to tightly connect the battery tabs stacked in the groove of the battery tab connector with the battery tab connector; plate 6 is used for partially stacking two battery modules in a battery module group The connection of the battery tabs, wherein there is an ABS board 2 in the middle of the stacked battery tabs; the board 7 is used to connect the partially stacked battery tabs and the ABS board 4 in a battery module.

The ABS insulation splint is made of ABS (Acrylonitrile Butadiene Styrene, acrylonitrile-styrene-butadiene copolymer) material, as shown in Figure 13-Figure 16, 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.

As can be seen from Figure 13 and Figure 15, one side of the opening end of ABS board 1 and ABS board 3 is provided with an open square groove, a half-open square groove and a U-shaped groove; Two open slots and a U-shaped slot are provided; as can be seen from FIG. 16 , two half-open slots and a U-shaped slot are provided on one side of the open end of the ABS board 4 . 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, and the positioning hole and the The diameter of the hole on the insulator matches, and the bolt passes through the hole in the square groove of the ABS insulating splint, the positioning hole of the battery lug connector and the hole on the insulator, and fixes the battery lug connector and the insulator on the ABS insulating splint superior. The ABS insulating 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 holes is 4-8 mm. The tie rods connect the battery packs together through these mounting holes.

Further, the combination of the ABS insulating splints contained in the flexible packaging battery module set provided by the present invention can be ABS board 1, ABS board 2 and ABS board 3 or ABS board 4, ABS board 2 and ABS board 3 or ABS board 4, ABS board 2 and ABS board 1, the ABS board 2 with two open square grooves is located in the middle position, and the opening direction of the half-open square grooves of the ABS board 1, ABS board 3 or ABS board 4 at both ends is facing the flexible packaging single battery .

The insulating part is made of ABS material, including the upper plate and the lower plate, as shown in Fig. 17 and Fig. 18, respectively, the structural diagrams of the insulating part-upper plate and the insulating part-lower plate. It can be seen from Fig. 17 and Fig. 18 that the insulating part-upper plate The insulator-lower plate is a concave-convex structure with a hole in the middle with a diameter of 5-7mm. The insulator-upper plate and the insulator-lower plate are combined to form a cuboid structure, which is located at the pole of the single battery. The ear end is perpendicular to the axial direction of the single battery, and the bolts pass through the holes between the insulator-upper plate and the insulator-lower plate to fix the insulator on the ABS insulating splint, which plays the role of fixing the connector and insulating between the connectors Therefore, the holes in the middle of the insulating part-upper plate and the insulating part-lower plate match the holes provided in the open square groove and the half-open square groove on the ABS insulating splint, and the width of the insulating part is the same as that of the ABS insulating splint. The open end matches the square opening.

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 (9)

1. flexible-packed battery module groups; Said group of battery modules comprises heat-dissipating aluminium plate, battery connector, ABS cleat insulator and insulating part; It is characterized in that said group of battery modules comprises three said ABS cleat insulators; Number is 30 a said heat-dissipating aluminium plate, and number is 28 a flexible package cell.

2. according to a kind of flexible-packed battery module groups of claim 1; It is characterized in that it is the installing hole of 4-8 millimeter that said heat-dissipating aluminium plate and the said ABS cleat insulator direction vertical with plate are provided with 1-4 corresponding aperture, through installing hole said heat-dissipating aluminium plate and said ABS cleat insulator are fixed with the axial vertical pull bar of said cell.

3. according to a kind of flexible-packed battery module groups of claim 1, it is characterized in that said battery connector processed by red copper, axially vertical with said cell; Said battery connector plate 1 is provided with the groove and the location hole that the aperture is the 4-8 millimeter that stack said single battery pole ears, the fixing hole that it is the 7-9 millimeter that said groove is provided with two apertures; Said battery connector plate 5 is positioned near said single battery pole ears one side, which is provided with the fixing hole that the aperture is the 7-9 millimeter;

Said battery connector plate 2 is provided with the groove and two location holes that the aperture is the 4-8 millimeter that stack said battery pole ear, the fixing hole that it is the 7-9 millimeter that groove is provided with an aperture;

Said battery connector plate 6 is provided with two symmetrically arranged groove and location holes that the aperture is the 4-8 millimeter that stack lug, the fixing hole that it is the 7-9 millimeter that each groove is provided with an aperture;

Said battery connector plate 7 is provided with the groove and the location hole that the aperture is the 4-8 millimeter that stack said battery pole ear, the fixing hole that it is the 7-9 millimeter that groove is provided with an aperture.

4. according to a kind of flexible-packed battery module groups of claim 1, it is characterized in that said heat-dissipating aluminium plate and said cell axially parallel, a side of said heat-dissipating aluminium plate is provided with the groove of fixing said cell; Said groove and the contact-making surface of cell be provided with battery shaft to identical strip phase-change material accumulator tank; Place phase-change material in the said phase-change material accumulator tank; Phase-change material is chosen according to battery operated preference temperature scope; Said temperature range is 25～35 ℃, and said phase-change material is inorganic solid-liquid or inorganic solid-solid phase transition material or organic solid-solid phase transition material.

5. according to a kind of flexible-packed battery module groups of claim 1; It is characterized in that groove that said heat-dissipating aluminium plate is provided with is arranged on an end of heat-dissipating aluminium plate; The other end of said heat-dissipating aluminium plate is provided with 1-2 through hole, scribbles heat conductive silica gel on the contact-making surface of said groove and cell.

6. according to a kind of flexible-packed battery module groups of claim 1, it is characterized in that said three ABS cleat insulators and said cell axially parallel, be positioned at the centre and the both sides of group of battery modules; The openend of said ABS cleat insulator and said single battery pole ears same axially on; Said ABS cleat insulator openend is provided with the square groove and the U type groove of opening, half opening.

7. according to a kind of flexible-packed battery module groups of claim 6, it is characterized in that said ABS cleat insulator comprises ABS plate 1, ABS plate 2, ABS plate 3 and ABS plate 4;

ABS plate 1 and ABS plate 3 openends are provided with each of square groove and the U type groove of square groove, the half opening of opening;

ABS plate 2 openends are provided with two open slots and a U type groove;

ABS plate 4 openends are provided with two semi-open slots and a U type groove;

U type groove is between the square groove of two openings or half opening.

8. according to a kind of flexible-packed battery module groups of claim 7, what it is characterized in that ABS cleat insulator that said flexible-packed battery module groups comprises is combined as ABS plate 1, ABS plate 2 and ABS plate 3 or ABS plate 4, ABS plate 2 and ABS plate 3 or ABS plate 4, ABS plate 2 and ABS plate 1;

ABS plate 2 is positioned at the centre of said flexible-packed battery module groups;

The opening direction of the half opening square groove of ABS plate 1, ABS plate 3 and ABS plate 4 is all towards said flexible package cell.

9. according to a kind of flexible-packed battery module groups of claim 1; It is characterized in that the rectangle that said insulating part constitutes for the parts by two convex-concave cooperations each other; Be positioned at said single battery pole ears end; It is axially axially vertical with cell, is respectively equipped with the location hole that the aperture is the 5-7 millimeter on the component axial that said convex-concave cooperates.

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