CN218070041U

CN218070041U - Long circulation lithium cell group package assembly

Info

Publication number: CN218070041U
Application number: CN202121523157.4U
Authority: CN
Inventors: 张兆宏; 刘洁; 李晶; 李祖院
Original assignee: Wuhu Etc Battery Ltd
Current assignee: Wuhu Etc Battery Ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-12-16
Anticipated expiration: 2031-07-06

Abstract

The utility model discloses a long circulating lithium cell group package assembly, including a plurality of electric cores, fixed band and end plate, adopt the double faced adhesive tape to bond between the adjacent electric core, a plurality of electric core concatenations link together and form electric core subassembly, and the end plate setting constitutes the main part module at the both ends of electric core subassembly, and the fixed band cup joints in the outside of main part module, and the fixed band includes steel strap and PET plastic ribbon, and the steel strap cup joints on the upper portion of main part module, and the PET plastic ribbon ligature is in the lower part of main part module. Long circulation module cycle life > 2000 times later stage electricity core can produce great bulging force, the utility model discloses pass through steel strap restriction module on module Z direction upper portion and at the deformation of X direction, module Z direction lower part end plate and box fixed beam bolted connection restrict the bulging force of module in X direction through the box fixed beam for structural stability also can be guaranteed at the later stage to the module.

Description

Long circulation lithium cell group package assembly

Technical Field

The utility model belongs to the technical field of power battery, concretely relates to long circulation lithium cell group package assembly.

Background

At present, 5G communication is vigorously developed in the country, and as the frequency spectrum of the 5G communication is distributed in a high frequency band, the signal attenuation is faster, and the coverage capability is weakened, compared with 4G, the communication signal covers the same area, and the number of 5G base stations is greatly increased. The electrochemical energy storage is not influenced by natural conditions, so that the electrochemical energy storage can be efficiently and flexibly applied to various scenes. It must be applied in the construction of the subsequent 5G base station. However, the electrochemical energy storage that is currently popular has the following problems.

1. Traditional electrochemistry energy storage main form is lead acid battery, and lead acid battery has produced very big obstacle to its wide application in cycle life, specific energy, environmental protection etc. the utility model discloses an adopt the lithium iron phosphate battery, more environmental protection, cycle life and specific energy are higher.

2. The current popular power lithium battery module mostly adopts an end plate and a side plate to enclose a frame structure, and the lithium battery module has the advantages of complex structure and process, high cost and difficulty in adapting to the low-cost requirement of the subsequent energy storage market.

3. Very expansibility can be produced to aluminium hull electricity core after long circulation, and the form that directly ties up is only adopted to PET plastic ribbon to popular many at present, and the module life cycle of this kind of mode in groups is applicable when about 1000, nevertheless when module life cycle requires 2000 ~ 3000 times even higher, and this kind of mode in groups can't restrict the huge expansibility that electricity core produced in the later stage, can cause the production of module functional failure even incident.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model aims to provide a simple structure convenient to use's long circulation lithium cell group package assembly.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a long circulation lithium cell group package assembly which characterized in that: including a plurality of electric cores, fixed band and end plate, adopt the double faced adhesive tape to bond between the adjacent electric core, a plurality of electric cores concatenation is in the same place to form electric core subassembly, and the end plate setting constitutes the main part module at the both ends of electric core subassembly, and the fixed band cup joints in the outside of main part module, and the fixed band includes steel strap and PET plastic ribbon, and the steel strap cup joints on the upper portion of main part module, and the PET plastic ribbon ligature is in the lower part of main part module.

Further, electric core is the lithium iron phosphate core, is equipped with tip insulating piece with the one side of electric core contact on the end plate, and the fixed band cup joints the outside of electric core and end plate and ties up end plate and electric core subassembly together and constitute stable module structure.

Furthermore, both sides portion of end plate is equipped with bordures, bordures to extending to the direction that is close to electric core, bordures and end plate perpendicular, and the end plate is placed at the lateral wall of electric core of the both ends of electric core subassembly and is contact with the inner wall of borduring.

Furthermore, a flanging is arranged on the edge covering, the flanging extends towards the direction far away from the edge covering, and the flanging is perpendicular to the edge covering.

Further, be equipped with the dog on the outer wall of end plate, the dog highly is higher than turn-ups top, and the steel strap cup joints on main part module, the top edge of steel strap and the bottom contact of dog, the lower limb and the turn-ups top contact of steel strap.

Furthermore, the dog is punching press circular arc structure, and the upper portion of dog is circular-arc, and the steel strap embolias from main part module top, and the steel strap joint is in the bayonet socket that dog and turn-ups formed.

Further, still be equipped with the baffle on the outer wall of end plate, the height that highly is less than turn-ups bottom of baffle, the ligature of PET plastic ribbon is on the main part module, and the joint of PET plastic ribbon is in the bayonet socket that forms between turn-ups and baffle.

Further, the bottom of main part module is equipped with the bottom insulating piece, and the laminating of bottom insulating piece is in the bottom of electric core, and lithium cell group package assembly still includes the upper cover, and the upper cover setting is at the top of electric core module, and the upper cover is through carrying on the back double faced adhesive tape or plastics rivet connection on the end plate.

Further, the lithium battery pack assembly structure further comprises a high-voltage connecting piece and a low-voltage connecting piece, wherein the high-voltage connecting piece is connected with the battery cell pole of each battery cell, and the low-voltage connecting piece is connected with the high-voltage connecting piece.

Furthermore, the high-voltage connecting piece is an output copper bar, the output copper bar connects the electric core poles of the adjacent electric cores together according to the series or parallel requirements, the low-voltage connecting piece is a wire harness, and the wire harness connects the output copper bars together.

Adopt the utility model discloses technical scheme's advantage does:

1. the utility model discloses a longer, the higher lithium iron phosphate core of energy density of cycle life, and this kind of lithium cell group structure has reduced module structure spare part, makes module weight greatly reduced. The energy density of the module is greatly improved; and the lithium iron phosphate core has longer cycle life than the traditional lead-acid battery. Structurally, adopt the double faced adhesive tape to bond between electric core, adopt panel beating end plate combination back in the X direction, Z direction upper portion cover steel strap, the mode in groups of PET plastic ribbon is pricked to the lower part for main structure design is reliable, succinct, thereby makes technological process simplify greatly, from the overall process reduce cost.

2. The utility model discloses electric core utilizes steel strap, PET plastic ribbon and panel beating end plate to form the main part module structure that N electric cores are one row in the X direction according to distribution demand and high voltage wiring mode, utilizes the double faced adhesive tape to bond between the electric core; the end plate stop block and the flanging limit the steel strap to move up and down, and the flanging and the baffle limit the PET plastic strap to move up and down, so that the structure is more reliable, and the hoisting hole enables the module to be more convenient and safer to mount and move; after electric core produced great bulging force at the circulation in-process, module Z direction upper portion passes through steel strap restriction module in the deformation of X direction, and module Z direction lower part baffle and box fixed beam bolted connection restrict the module at the ascending bulging force of X direction through the box fixed beam for structural stability also can be guaranteed at the later stage to the module.

Drawings

The invention will be described in further detail with reference to the following drawings and detailed description:

fig. 1 is an exploded view of a long-cycle lithium battery pack assembly structure according to the present invention;

fig. 2 is a schematic structural view of the end plate of the present invention;

FIG. 3 is a schematic view of the steel band structure of the present invention;

fig. 4 is an assembly schematic diagram of the lithium battery pack structure of the present invention.

The labels in the above figures are respectively: 1. an end plate; 11. edge covering; 12. flanging; 13. a stopper; 14. a baffle plate; 2. fixing belts; 21. a steel strap; 22. PET plastic binding tapes; 3. an electric core; 4. an end portion insulating sheet; 5. A bottom insulating sheet; 6. a high-pressure connector; 7. a low-pressure connector; 8. and (7) covering.

Detailed Description

In the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "plane direction", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 4, a long-cycle lithium battery pack assembly structure is characterized in that: including a plurality of electric cores 3, fixed band 2 and end plate 1, adopt 9 bonds of double faced adhesive tape between the adjacent

electric core

3, 3 concatenation of a plurality of electric cores are linked together and are formed electric core subassembly, end plate 1 sets up and constitutes the main part module at the both ends of electric core subassembly, fixed band 2 cup joints the outside at the main part module, fixed band 2 includes steel strap 21 and PET plastic ribbon 22, steel strap 21 cup joints the upper portion at the main part module, PET plastic ribbon 22 ligature is in the lower part of main part module. Long circulation module cycle life > 2000 times later stage electricity core can produce great bulging force, the utility model discloses pass through steel strap 21 on module Z direction upper portion and restrict the module in the deformation of X direction, module Z direction lower part end plate and box fixed beam bolted connection restrict the bulging force of module in X direction through the box fixed beam for structural stability also can be guaranteed at the later stage to the module.

The steel strap is spare part alone, and the main part substrate has stronger intensity for the manganese steel and can restrict module later stage bulging force, and size L is the fixed value in the strap, need earlier with extrusion frock with electric core subassembly length extrusion to within the L value at the assembled, embolias the steel strap again.

Electric core 3 is the lithium iron phosphate core, is equipped with tip insulating piece 4 with the one side of 3 contacts of electric core on the end plate 1, and fixed band 2 cup joints the outside of electric core and end plate 1 and ties up end plate 1 and electric core subassembly and constitute stable module structure together.

The lithium iron phosphate battery pack has the advantages that the lithium iron phosphate battery cell with long cycle life and high energy density is adopted, and the number of structural parts of the battery pack is reduced, so that the weight of the battery pack is greatly reduced. The energy density of the module is greatly improved; and the lithium iron phosphate core has longer cycle life than the traditional lead-acid battery. Structurally, adopt the double faced adhesive tape to bond between electric core, adopt panel beating end plate combination back in the X direction, Z direction upper portion cover steel strap, the mode in groups of PET plastic ribbon is pricked to the lower part for main part structural design is reliable, succinct, thereby makes the process flow simplify greatly, from the overall process reduce cost.

The end plate is provided with a fixing hole 16 and a hoisting hole 15 for carrying the module, and the end plate and the electric core assembly are connected on the vehicle body as a whole through a fastener.

Both sides portion of end plate 1 is equipped with bordure 11, and bordure 11 extends to the direction that is close to electric core 3, and bordure 11 is perpendicular with end plate 1, and end plate 1 places the lateral wall of electric core 3 at the both ends of electric core subassembly and the inner wall contact of borduring 11. The edge-turned edge 12 is arranged on the edge-turned edge 11, the edge-turned edge 12 extends towards the direction far away from the edge-turned edge 11, and the edge-turned edge 12 is perpendicular to the edge-turned edge 11.

Be equipped with dog 13 on the outer wall of end plate 1, dog 13 highly is higher than the top of turn-ups 12, and steel strap 21 cup joints on the main part module, the top edge of steel strap 21 and the bottom contact of dog 13, the lower limb of steel strap 21 and the top contact of turn-ups 12. The dog 13 is punching press circular arc structure, and the upper portion of dog 13 is circular-arc, and steel strap 21 embolias from the main part module top, and steel strap 21 joint is in the bayonet socket that dog 13 and turn-ups 12 formed.

Still be equipped with baffle 14 on the outer wall of end plate 1, baffle 14 highly be less than the bottom of turn-ups 12, PET plastic ribbon 22 ligature on the main part module, and PET plastic ribbon 22 joint is in the bayonet socket that forms between turn-ups 12 and baffle 14, the top edge of PET plastic ribbon 22 and the bottom contact of turn-ups 12, the lower limb of PET plastic ribbon 22 and the top contact of baffle 14.

The bottom of the main body module is provided with a bottom insulating sheet 5, the bottom insulating sheet 5 is attached to the bottom of the battery core 3, the battery cores are bonded by double faced adhesive tapes, the sheet metal end plate is connected with the battery core through the double faced adhesive tapes after being coated with insulating materials, and the lithium battery pack is extruded by an auxiliary extrusion tool to reach an ideal length (less than L); the steel strap is sleeved into the module through the end plate stop block 13 along the Z direction, the stop block 13 is of a stamping arc structure, the steel strap is convenient to sleeve, the stop block 13 and the flanging 12 are combined to limit the steel strap to move up and down, after the steel strap is sleeved, the PET plastic strap 22 is tied to the lower portion of the Z direction module, and the flanging 12 and the baffle 14 limit the PET plastic strap to move up and down. And (3) adhering an insulating material to the large surface of the bottom of the module, and forming the main structure of the module after the process is finished.

The lithium battery pack structure further comprises a high-voltage connecting piece 6 and a low-voltage connecting piece 7, the high-voltage connecting piece 6 is connected with the battery cell pole of each battery cell 3, and the low-voltage connecting piece 7 is connected with the high-voltage connecting piece 6. The high-voltage connecting piece 6 is an output copper bar which connects the electric core poles of the adjacent electric cores together according to the serial or parallel requirements, the low-voltage connecting piece 7 is a wire harness, and the wire harness connects the output copper bars together. Specifically, welded connection aluminium bar and output bar, output bar press rivet bolt can attach with the direct lock of output copper bar, and the installation gathers the pencil, gathers electric core temperature, voltage information. The wire harness and the module can be fixed by riveting, bolting, ultrasonic welding or the like.

The lithium battery pack assembly structure further comprises an upper cover 8, wherein the upper cover 8 is arranged at the top of the battery cell module, and the upper cover 8 is connected to the end plate 1 through a back double-sided adhesive tape or a plastic rivet. The upper cover adopts a PC hot-folding process, has lower cost and is connected with the end plate through the primary and secondary rivets.

The battery cells form a main body module structure with N battery cells in a row in the X direction by using a steel strap, a PET plastic binding belt and a sheet metal end plate according to power distribution requirements and a high-voltage wiring mode, the battery cells are bonded by using double-sided adhesive, and the module length needs to be controlled within 600 mm; the end plate stop block 13 and the flanging 12 limit the steel strap to move up and down, the flanging 12 and the baffle 14 limit the PET plastic strap to move up and down, so that the structure is more reliable, and the hoisting hole 15 enables the module to be more convenient and safer to mount and move.

After electric core produced great bulging force at the circulation in-process, module Z direction upper portion passes through steel strap restriction module and at the deformation of X direction, and module Z direction lower part baffle 14 and box fixed beam bolted connection restrict the bulging force of module in the X direction through the box fixed beam for structural stability also can be guaranteed at the later stage to the module.

The utility model provides a low-cost, long circulation lithium cell group package assembly of high specific energy is in order to replace present traditional lead acid energy storage and the power lithium cell group structure that traditional energy storage was used. The main advantages are as follows:

1. the cost is low: structurally, double-sided adhesive tapes are adopted for bonding between the electric cores, and a grouping mode of binding the plastic strap after the metal plate end plates are combined is adopted in the X direction, so that the main structure design is reliable and simple, the process flow is greatly simplified, and the cost is reduced in the whole process;

2. high specific energy: adopt the lithium iron phosphate core, energy density is high, and this kind of lithium cell group structure has reduced module structure spare part, makes module weight greatly reduced. The energy density of the module is greatly improved;

3. long circulation: the long-cycle lithium iron phosphate core is adopted, so that the long-cycle lithium iron phosphate core has longer cycle life than the traditional lead-acid battery;

4. the structure is reliable: long circulation module (cycle life > 2000 times) later stage electricity core can produce great bulging force, and this patent passes through the deformation of steel strap restriction module in the X direction on module Z direction upper portion, and module Z direction lower part baffle and box fixed beam bolted connection restrict the bulging force of module in the X direction through the box fixed beam for structural stability also can be guaranteed at the later stage to the module.

The present invention is described above with reference to the accompanying drawings, it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements made by the technical solution of the present invention or the present invention is directly applied to other occasions without improvement, all within the protection scope of the present invention.

Claims

1. The utility model provides a long circulating lithium cell group package assembly which characterized in that: the battery fixing structure comprises a plurality of battery cores (3), fixing bands (2) and end plates (1), wherein two-sided adhesive is used for bonding between adjacent battery cores (3), the battery cores (3) are spliced together to form a battery assembly, the end plates (1) are arranged at two ends of the battery assembly to form a main body module, the fixing bands (2) are sleeved outside the main body module, each fixing band (2) comprises a steel strap (21) and a PET plastic strap (22), the steel strap (21) is sleeved on the upper portion of the main body module, and the PET plastic strap (22) is bound on the lower portion of the main body module; both sides portion of end plate (1) is equipped with bordure (11), and bordure (11) extend to the direction that is close to electric core (3), and it is perpendicular with end plate (1) bordure (11), and the lateral wall of placing at electric core subassembly's both ends electricity core (3) and the inner wall contact of borduring (11) end plate (1).

2. The long-cycle lithium battery pack assembly structure of claim 1, wherein: electric core (3) are the lithium iron phosphate core, are equipped with tip insulating piece (4) with the one side of electric core (3) contact on end plate (1), and fixed band (2) cup joint and tie up end plate (1) and electric core subassembly in the outside of electric core and end plate (1) and constitute stable module structure together.

3. The long-cycle lithium battery pack assembly structure of claim 2, wherein: the edge-wrapping device is characterized in that a turned-over edge (12) is arranged on the edge-wrapping (11), the turned-over edge (12) extends towards the direction far away from the edge-wrapping (11), and the turned-over edge (12) is perpendicular to the edge-wrapping (11).

4. The long-cycle lithium battery pack assembly structure of claim 3, wherein: be equipped with dog (13) on the outer wall of end plate (1), the top that highly is higher than turn-ups (12) of dog (13), steel strap (21) cup joint on main part module, the top edge of steel strap (21) and the bottom contact of dog (13), the bottom edge of steel strap (21) and the top contact of turn-ups (12).

5. The long-cycle lithium battery pack assembly structure of claim 4, wherein: the stop block (13) is of a stamping arc structure, the upper portion of the stop block (13) is arc-shaped, the steel strap (21) is sleeved from the top of the main body module, and the steel strap (21) is clamped in a bayonet formed by the stop block (13) and the flanging (12).

6. The long-cycle lithium battery pack assembly structure of claim 5, wherein: still be equipped with baffle (14) on the outer wall of end plate (1), the bottom that highly is less than turn-ups (12) of baffle (14), PET plastic ribbon (22) ligature is on the main part module, and PET plastic ribbon (22) joint is in the bayonet socket that forms between turn-ups (12) and baffle (14).

7. The long-cycle lithium battery pack assembly structure of claim 6, wherein: the bottom of main part module is equipped with bottom insulating piece (5), and bottom insulating piece (5) laminating is in the bottom of electric core (3), and lithium cell group packaging structure still includes upper cover (8), and upper cover (8) set up at the top of electric core module, and upper cover (8) are through carrying on the back double faced adhesive tape or plastics rivet connection on end plate (1).

8. The long-cycle lithium battery pack assembly structure of claim 7, wherein: the lithium battery pack assembly structure further comprises a high-voltage connecting piece (6) and a low-voltage connecting piece (7), wherein the high-voltage connecting piece (6) is connected with the battery cell pole of each battery cell (3), and the low-voltage connecting piece (7) is connected with the high-voltage connecting piece (6).

9. The long-cycle lithium battery pack assembly structure of claim 8, wherein: the high-voltage connecting piece (6) is an output copper bar, the output copper bar connects the battery cell poles of the adjacent battery cells together according to the series or parallel requirements, the low-voltage connecting piece (7) is a wire harness, and the wire harness connects the output copper bars together.