CN213636143U

CN213636143U - Soft package lithium ion battery module

Info

Publication number: CN213636143U
Application number: CN202023121341.4U
Authority: CN
Inventors: 周湘淇; 赵昆清; 吴黎明; 徐小龙; 马伟伟
Original assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Current assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-07-06
Anticipated expiration: 2030-12-22

Abstract

The utility model provides a soft-packing lithium ion battery module belongs to battery technical field. The problem that the existing lithium ion battery module is difficult to consider connection stability and disassembly and assembly convenience is solved. The flexible package lithium ion battery module comprises at least one pair of battery cells with sheet lugs at the tops and a mounting plate positioned above the battery cells, wherein at least one locking stud is vertically arranged on the mounting plate, long-strip-shaped limiting notches are formed in the two sides of the locking stud by the mounting plate, the two lug poles of the same pair of battery cells respectively upwards penetrate through the two limiting notches on the two sides of the locking stud and are oppositely bent and then vertically overlapped, and a locking nut for pressing the overlapped parts of the two lug poles onto the mounting plate is screwed on the locking stud. This soft package lithium ion battery module can compromise utmost point ear connection stability and dismouting convenience.

Description

Soft package lithium ion battery module

Technical Field

The utility model belongs to the technical field of the battery, a soft-packing lithium ion battery module is related to.

Background

The flexible package lithium ion battery module is that liquid lithium ion battery sheathes one deck polymer shell, structurally adopts the plastic-aluminum membrane packing, and the flexible package battery can only blow apart at most under the condition that takes place the potential safety hazard, and can explode like steel-shelled aluminum hull electricity core, and flexible package lithium ion battery module includes the electric core of a plurality of flexible packages usually, all has utmost point ear on every electric core, realizes establishing ties each other through the utmost point ear electricity with adjacent electric core.

In order to achieve the connection of the tabs, patent document (application No. 201310450030.8) discloses a soft-packed lithium ion battery comprising: the battery comprises an electric core, a pole column, a battery upper cover, a battery lower shell and a pole column sleeve member embedded in the battery upper cover, wherein the number of the electric core is even, the pole ear of the electric core penetrates through a pole ear groove of the pole column sleeve member and is attached to the pole column sleeve member and a relative inclined plane of the pole column, the pole column is fixedly connected with the pole column sleeve member through a connecting bolt, the battery upper cover is fixedly connected with the battery lower shell, the pole ear connection is realized through the pole column sleeve member and an inclined plane structure on the pole column, the contact resistance of the battery is greatly reduced through a high-efficiency inclined pressure structure mode of the pole ear, the pole column is connected with the pole column sleeve member through the connecting bolt, the disassembly and the assembly are also convenient, but in the assembly process, the inclined plane of the pole column can generate inclined thrust to the pole ear when the connecting bolt is screwed, the inclined thrust can cause the shift of, other parts of the pole lug can also deform, and the structural stability is further influenced.

In order to solve the problem of poor stability, a patent document (application number: 201921380193.2) discloses a battery cell series module support and a battery cell series module thereof, wherein the battery cell series module support comprises a module support main body, one end of the battery cell series module support is provided with a first tab welding platform, two sides of the first tab welding platform are respectively provided with a first tab welding through groove, and a partition plate is arranged between the adjacent first tab welding platforms; the other end is provided with a second lug welding platform, a second lug welding through groove is formed in the second lug welding platform, leading-out lug welding platforms are arranged on two sides of the second lug welding platform, the leading-out lug welding platforms are far away from one side of the second lug welding platform and are provided with leading-out lug welding through grooves, the height of the second lug welding platforms is higher than that of the leading-out lug welding platforms, namely, two first lugs are fixedly connected through welding after being mutually overlapped on the first lug welding platforms, and two second lugs are fixedly connected through welding after being mutually overlapped on the second lug welding platforms, the lugs of the battery cell series module are electrically connected through welding, so that higher connection stability is achieved in the later-stage use process, the welding supply of the lugs with smaller size is complex, the disassembly is difficult after the welding, and the integral disassembly and assembly are inconvenient.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a soft-packing lithium ion battery module for solve current lithium ion battery module and be difficult to compromise the problem of connection stability and dismouting convenience.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a soft-packing lithium ion battery module, includes that at least a pair of top has the electric core of slice utmost point ear and is located the mounting panel of electric core top, its characterized in that, be provided with at least one locking double-screw bolt perpendicularly on the mounting panel, the long banding spacing breach has all been seted up to the mounting panel in the both sides of locking double-screw bolt, and two spacing breachs that the same two pole ears to electric core upwards passed the locking double-screw bolt both sides respectively to fold about buckling the back relatively, the spiro union has the lock nut who compresses tightly two utmost point ear looks coincide parts on the mounting panel on the locking double-.

The battery cell is flat plate-shaped, the side surfaces of the battery cell are mutually attached and abutted, so that the same pair of lugs are oppositely arranged, the locking stud is pre-arranged on the mounting plate, the mounting plate can be positioned above the battery cell during assembly, the two lugs respectively upwards penetrate through the two limiting notches and then are oppositely bent and mutually overlapped, then the locking stud is locked through the locking nut, the locking nut can be tightly pressed on the lugs from top to bottom, so that the electric connection assembly of the lugs is realized, the assembly and disassembly are convenient, the two lugs are overlapped one on the other when the assembly is completed, the two lugs are in surface contact and locked through the locking nut, so that the two lugs have larger contact area to ensure the stability of the electric connection, simultaneously, the two lugs upwards penetrate through the limiting notches, the limiting notches can limit and restrict the lower parts of the lugs, and the phenomenon that the lower parts of the lugs are shifted or deformed to cause the relative shift of the overlapped parts of the two lugs is avoided, guarantee the stability that two poles of the earth ear is connected, this application carries out spacing restraint through spacing breach to the lower part of utmost point ear promptly, cooperates through locking double-screw bolt and lock nut, compresses tightly fixedly the upper portion of utmost point ear to compromise utmost point ear connection stability and dismouting convenience.

In foretell flexible package lithium ion battery module, electric core has a plurality ofly to arrange in proper order, be equipped with a plurality ofly on the mounting panel to the locking double-screw bolt, and same both sides to the locking double-screw bolt have all seted up spacing breach, a plurality ofly to electric core and a plurality of locking double-screw bolt one-to-one, and same two pole ears to electric core are fixed through two locking double-screw bolts locks. Each pair of lugs is locked and fixed through two locking studs and locking nuts, so that the connection stability between the same pair of lugs is ensured, and the lugs of a plurality of pairs of battery cells are locked and fixed on the same mounting plate, so that the connection stability between the lugs of the plurality of pairs of lugs is ensured.

In foretell flexible package lithium ion battery module, a plurality of spacing breach looks parallel arrangement, and a side border of mounting panel is all run through to the one end of a plurality of spacing breach, the one end port that the spacing breach runs through the mounting panel border has the direction cambered surface. Because spacing breach looks parallel arrangement and one end are the opening form, consequently can with a plurality of utmost point ears of arranging in proper order respectively from the opening part level of a plurality of spacing breach tip insert can, avoid utmost point ear from bottom to top to pass and lead to the equipment degree of difficulty increase, and the direction cambered surface then plays the guide effect when utmost point ear inserts, avoid appearing the jamming, and also only need during the dismantlement with utmost point ear from spacing breach tip opening take out can for the dismouting is more convenient.

In foretell flexible package lithium ion battery module, the mounting panel includes mounting plate, a plurality of locating holes have been seted up on the mounting plate, and these a plurality of locating holes are interior polygonal hole, the lower extreme of locking double-screw bolt all has the positioning head that is cubic and shape and locating hole suit, in the positioning head embedding positioning hole, still be fixed with on the mounting plate and fix a position the mounting clamp plate in the locating hole with the positioning head when lock nut locks. The locating hole can play circumference location to the location head, appears idling when avoiding lock nut locking, improves the dismouting convenience, and pushes down the location head through the installation clamp plate for it is more convenient when locking double-screw bolt installation, and it is high to compress tightly back stability with utmost point ear.

In the flexible package lithium ion battery module, the mounting pressing plate is attached and fixed on the upper side surface of the mounting bottom plate, a plurality of circular through holes which are one-to-one opposite to the positioning holes are formed in the mounting pressing plate, and the locking studs upwards penetrate through the circular through holes. The circular through hole is adapted to the locking bolt, so that the mounting pressing plate limits the positioning head through the edge position of the circular through hole, and the stability is improved.

In foretell soft-packing lithium ion battery module, the lower extreme of locating hole runs through the mounting plate downside, still the laminating has linked firmly insulating paper layer on the mounting plate downside, insulating paper layer covers the lower extreme of locating hole. This structure makes the locking double-screw bolt upwards penetrate from the locating hole lower extreme, then through insulating paper seal cover can, the dismouting is more convenient.

In the flexible package lithium ion battery module, the mounting base plate is an epoxy plate, the mounting pressing plate is a PCB, and the upper side surface of the mounting base plate is attached to and bonded with the lower side surface of the mounting pressing plate. Epoxy board has higher hardness to guarantee holistic structural stability, the installation clamp plate laminating bonds on mounting plate, makes mounting plate play the effect of restraint and keeping to the installation clamp plate, avoids long-term use in-process installation clamp plate to appear deforming.

In the flexible package lithium ion battery module, the two locking studs of the same pair are also sleeved with strip-shaped gaskets, each locking stud is sleeved with a gasket, and when the locking nuts are locked, the locking nuts are pressed on the gaskets through the gaskets, so that the two lugs are pressed on the mounting plate by the gaskets. Locking nut compresses tightly on utmost point ear through packing ring and gasket, and the gasket has bigger area of contact with utmost point ear, and then makes utmost point ear atress more even, and the position homoenergetic that two pole ears contacted can compress tightly to lean on, guarantees connection stability.

In the flexible package lithium ion battery module, the long edge of the tab is provided with two abdicating notches, and the two locking studs respectively and upwards penetrate through the two abdicating notches. The locking stud can conveniently penetrate through the lug, and the locking stud can limit the lug through the abdicating notch, so that the connection stability of the lug is ensured.

In foretell flexible package lithium ion battery module, the both sides of utmost point ear all are equipped with long banding limiting plate, two the face of limiting plate pastes respectively and leans on the both sides side at utmost point ear, the lower border of limiting plate supports and leans on the top surface of electric core, and the last border supports and leans on the downside of mounting panel, the thickness of limiting plate all is greater than the width of spacing breach. Clamping is carried out through two limiting plates to utmost point ear vertical portion promptly and is spacing for whole utmost point ear is carried on spacingly and is compressed tightly through limiting plate, spacing breach and gasket respectively by supreme down, avoids utmost point ear to appear deformation or shift, and then guarantees utmost point ear connection stability, and the mounting panel supports and leans on along on the limiting plate, makes mounting panel and electric core to lean on through the limiting plate counterbalance, avoids appearing shifting each other and influence utmost point ear stability.

Compared with the prior art, the flexible package lithium ion battery module has the following advantages:

1. because can be fixed a position the mounting panel in electric core top during the equipment, the bipolar lug upwards passes two spacing breachs respectively after relative bending and coincide each other, then locks through lock nut, lock nut can follow and down compress tightly on utmost point ear to realize the electric connection equipment of utmost point ear, only need during the dismantlement with lock nut loosen and pull out utmost point ear can, therefore easy dismounting.

2. Because two pole ears coincide mutually one on the other when accomplishing the equipment, both realize the face contact and lock through lock nut for two pole ears have great area of contact in order to guarantee the stability of electricity connection, and two utmost point ears all upwards pass spacing breach simultaneously, and spacing breach can play spacing restraint to the lower part of utmost point ear, avoids the utmost point ear lower part to appear shifting or deformation and leads to two pole ears coincide part to appear shifting relatively, guarantees the stability that two pole ears electricity were connected.

Drawings

Fig. 1 is a schematic partial three-dimensional structure diagram of a flexible package lithium ion battery module.

Fig. 2 is an enlarged view of a structure at a in fig. 1.

Fig. 3 is a partial structure top view of a flexible package lithium ion battery module.

Fig. 4 is a sectional view of the structure at B-B in fig. 3.

Fig. 5 is an enlarged view of the structure at C in fig. 4.

In the figure, 1, a cell; 11. a tab; 111. a abdication gap; 2. mounting a plate; 21. mounting a bottom plate; 211. positioning holes; 22. installing a pressing plate; 221. a circular through hole; 23. an insulating paper layer; 24. a limiting notch; 241. a guiding cambered surface; 3. locking the stud; 31. positioning the head; 4. locking the nut; 5. a gasket; 6. a gasket; 7. and a limiting plate.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and fig. 2, a flexible package lithium ion battery module comprises a plurality of pairs of battery cells 1 and a mounting plate 2, wherein the battery cells 1 are all in a flat plate shape, the plurality of pairs of battery cells 1 are sequentially arranged, the side surfaces of the battery cells 1 are mutually attached and abutted and fixed together, the top of each battery cell 1 is provided with a tab 11, the tabs 11 are all in a strip shape, the tabs 11 are arranged along the length direction of the top of each battery cell 1, the mounting plate 2 is arranged above the plurality of battery cells 1, the mounting plate 2 is vertically provided with a plurality of pairs of locking studs 3, the two locking studs 3 of the same pair are arranged along the length direction of the tabs 11, the plurality of pairs of locking studs 3 are sequentially arranged along the arrangement direction of the plurality of battery cells 1, the mounting plate 2 is provided with limiting notches 24 on both sides of each pair of locking studs 3, so that the plurality of limiting notches 24 are, one end of each of the limiting notches 24 penetrates one side edge of the mounting plate 2, a guide cambered surface 241 is arranged at one end port of each limiting notch 24 penetrating the edge of the mounting plate 2, so that the opening at the end part of each limiting notch 24 is flared, strip-shaped limiting plates 7 are arranged on two sides of the lower parts of the lugs 11, the limiting plates 7 are arranged along the length direction of the lugs 11, the plate surfaces of the two limiting plates 7 are respectively attached to the side surfaces of the lugs 11, the thickness of each limiting plate 7 is larger than the width of the limiting notch 24, the upper parts of the lugs 11 respectively penetrate the limiting notches 24 upwards, the penetrating parts of the lugs 11 penetrating through the limiting notches 24 on two sides of the same pair of locking studs 3 are oppositely bent and then overlapped up and down, a locking nut 4 is screwed on the locking stud 3, the overlapped parts of the lugs 11 are tightly pressed on the mounting plate 2 when the locking nut 4 is locked, and, so that the lower edge of the limiting plate 7 abuts against the top surface of the battery cell 1.

Specifically, as shown in fig. 3, 4 and 5, the mounting plate 2 includes a mounting base plate 21 and a mounting pressing plate 22, the mounting base plate 21 is an epoxy plate, the mounting pressing plate 22 is a PCB plate, a plurality of positioning holes 211 are formed in the mounting base plate 21, the plurality of positioning holes 211 are inner polygonal holes, lower ends of the positioning holes 211 penetrate through a lower side surface of the mounting base plate 21, lower ends of the locking studs 3 are respectively provided with positioning heads 31 having a block shape and a shape corresponding to the positioning holes 211, the positioning heads 31 of the plurality of locking studs 3 are respectively embedded into the plurality of positioning holes 211, a lower side surface of the mounting pressing plate 22 is attached and adhesively connected to an upper side surface of the mounting base plate 21, the mounting pressing plate 22 is provided with a plurality of circular through holes 221 one-to-one corresponding to the positioning holes 211, the locking studs 3 extend upward from the circular through holes 221, the mounting pressing plate 22 can limit the positioning heads 31 in the positioning holes 211, the insulating paper layer 23 seals the lower ends of the positioning holes 211. Two notches 111 of stepping down have all been seted up along the department of the long limit of utmost point ear 11, and two lock stud 3 upwards pass two notches 111 of stepping down respectively, still overlap on two lock studs 3 of the same pair and establish rectangular form gasket 5, all overlap on each lock stud 3 and be equipped with packing ring 6, work as lock nut 4 compresses tightly on gasket 5 through packing ring 6 when lock nut 4 locks for gasket 5 compresses tightly two utmost point ears 11 on mounting panel 2.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although terms such as the battery cell 1, the tab 11, the relief notch 111, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a soft-packing lithium ion battery module, includes that at least a pair of top has electric core (1) of slice utmost point ear (11) and is located mounting panel (2) of electric core (1) top, its characterized in that, be provided with at least one locking double-screw bolt (3) on mounting panel (2) perpendicularly, rectangular form spacing breach (24) have all been seted up in the both sides of locking double-screw bolt (3) in mounting panel (2), and two utmost point ears (11) of same pair electric core (1) upwards pass two spacing breach (24) of locking double-screw bolt (3) both sides respectively to coincide from top to bottom after buckling relatively, the spiro union has lock nut (4) of compressing tightly two utmost point ear (11) looks coincide parts on mounting panel (2) on locking double-screw bolt (3).

2. The flexible package lithium ion battery module according to claim 1, wherein the battery core (1) has a plurality of pairs and is arranged in sequence, the mounting plate (2) is provided with a plurality of pairs of locking studs (3), and both sides of the same pair of locking studs (3) are provided with limiting notches (24), the plurality of pairs of battery cores (1) and the plurality of pairs of locking studs (3) are in one-to-one correspondence, and the same pair of two electrode lugs (11) of the battery core (1) is locked and fixed through the two locking studs (3).

3. The flexible package lithium ion battery module according to claim 2, wherein the plurality of limiting notches (24) are arranged in parallel, one end of each limiting notch (24) penetrates through one side edge of the mounting plate (2), and a guide arc surface (241) is arranged at one end port of each limiting notch (24) penetrating through the edge of the mounting plate (2).

4. The flexible package lithium ion battery module according to claim 2 or 3, wherein the mounting plate (2) comprises a mounting base plate (21), the mounting base plate (21) is provided with a plurality of positioning holes (211), the positioning holes (211) are all inner polygonal holes, the lower ends of the locking studs (3) are respectively provided with a positioning head (31) which is blocky and has a shape matched with that of the positioning holes (211), the positioning head (31) is embedded into the positioning holes (211), and the mounting base plate (21) is further fixed with a mounting pressing plate (22) which is used for positioning the positioning head (31) in the positioning holes (211) when the locking nut (4) is locked.

5. The flexible package lithium ion battery module according to claim 4, wherein the mounting pressing plate (22) is attached and fixed on the upper side surface of the mounting base plate (21), a plurality of circular through holes (221) which are opposite to the positioning holes (211) one by one are formed in the mounting pressing plate (22), and the locking studs (3) upwards penetrate through the circular through holes (221).

6. The flexible package lithium ion battery module according to claim 4, wherein the lower end of the positioning hole (211) penetrates through the lower side surface of the mounting base plate (21), an insulating paper layer (23) is further attached and fixed to the lower side surface of the mounting base plate (21), and the insulating paper layer (23) covers the lower end of the positioning hole (211).

7. The flexible package lithium ion battery module according to claim 5, wherein the mounting base plate (21) is an epoxy plate, the mounting pressing plate (22) is a PCB plate, and the upper side surface of the mounting base plate (21) is fixedly bonded with the lower side surface of the mounting pressing plate (22).

8. The flexible package lithium ion battery module according to claim 2 or 3, characterized in that the two locking studs (3) of the same pair are sleeved with a strip-shaped gasket (5), each locking stud (3) is sleeved with a washer (6), and when the locking nuts (4) are locked, the locking nuts (4) are pressed against the gasket (5) through the washers (6), so that the gasket (5) presses the two tabs (11) against the mounting plate (2).

9. The flexible package lithium ion battery module according to claim 2 or 3, wherein the long edges of the tabs (11) are respectively provided with two abdicating notches (111), and the two locking studs (3) respectively penetrate upwards through the two abdicating notches (111).

10. The flexible package lithium ion battery module according to claim 1, 2 or 3, wherein the two sides of the tab (11) are provided with elongated limiting plates (7), the surfaces of the two limiting plates (7) are respectively attached to the two side surfaces of the tab (11), the lower edges of the limiting plates (7) are attached to the top surface of the battery cell (1), the upper edges of the limiting plates are attached to the lower side surface of the mounting plate (2), and the thickness of the limiting plates (7) is greater than the width of the limiting notch (24).