CN214227047U

CN214227047U - Laminate polymer battery module

Info

Publication number: CN214227047U
Application number: CN202120465440.XU
Authority: CN
Inventors: 王晓晴; 刘浩; 高灵雷
Original assignee: Gotion High Tech Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-09-17
Anticipated expiration: 2031-03-04

Abstract

The utility model discloses a laminate polymer battery module, it relates to battery technical field, include: a cell module comprising; the battery pack comprises a plurality of battery blocks, foam and double-sided adhesive tapes, wherein at least three battery blocks form a group of battery block units, the foam is arranged between every two adjacent battery block units, and the adjacent battery blocks in one battery block unit are bonded through the double-sided adhesive tapes; the first end plate mechanism comprises a first integrated cover plate end plate, a first insulating end plate and a first metal end plate, and the second end plate mechanism comprises a second integrated cover plate end plate, a second insulating end plate and a second metal end plate; the battery cell module comprises a battery cell module and is characterized in that a cover plate mechanism is arranged on the circumferential side wall of the battery cell module, foam is arranged between the side wall of the battery cell module and the cover plate mechanism, and a thermosetting insulating adhesive tape is arranged between the upper surface and/or the lower surface of the battery cell module and the cover plate mechanism. This application can optimize the structure of whole laminate polymer battery module, makes it safer, compact, firm.

Description

Laminate polymer battery module

Technical Field

The utility model relates to a battery technology field, in particular to laminate polymer battery module.

Background

The battery module is a subassembly, which is generally a secondary structure of a power battery pack and is formed by combining battery cells in series or in parallel and then providing electric energy after a fixing device is arranged. The battery is divided into three types, namely a cylindrical battery cell, a square-shell battery cell and a soft-package battery cell, according to the structural shape of the battery cell. The soft package battery core has the advantages of high energy density, long cycle life, low internal resistance, excellent charge and discharge characteristics, light packaging material and the like. Therefore, the soft package battery module gradually becomes more and more popular in the field of new energy automobiles.

Because soft packet of lithium cell extranal packing is metal plastic film generally, and is relatively thin in order to alleviate weight, therefore comparatively fragile, very easily damaged, so can appear causing short circuit or other irreversible destruction because of stress concentration when violent vibration after assembling soft packet of battery into a group. In prior art, many producers all can set up some compression bubble cottons in battery module inside to the realization is to the protection of electric core or and form certain expend with heat and contract with cold leeway, but does not optimize this structure, thereby causes the protection effect to electric core less than, and too big increase the size of whole battery module.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above defect of prior art, the embodiment of the utility model provides a technical problem that will solve provides a laminate polymer battery module, and it can optimize the structure of whole laminate polymer battery module, makes it safer, compact, firm.

The embodiment of the utility model provides a concrete technical scheme is:

the utility model provides a laminate polymer battery module, laminate polymer battery module includes:

a cell module comprising; the battery pack comprises a plurality of battery blocks, foam and double-sided adhesive tapes which are arranged, wherein at least three battery blocks form a group of battery block units, the foam is arranged between every two adjacent battery block units, and the adjacent battery blocks in one battery block unit are bonded through the double-sided adhesive tapes;

the first end plate mechanism and the second end plate mechanism are respectively arranged at two ends of the cell module, the first end plate mechanism comprises a first integrated cover plate end plate, a first insulating end plate and a first metal end plate which are sequentially arranged along the direction away from the cell module, the second end plate mechanism comprises a second integrated cover plate end plate, a second insulating end plate and a second metal end plate which are sequentially arranged along the direction away from the cell module, the first integrated cover plate end plate and the second integrated cover plate end plate are used for conducting flow guiding on the cell module and collecting state information, the first insulating end plate is used for insulating and isolating the first integrated cover plate end plate and the first metal end plate, and the second insulating end plate is used for insulating and isolating the second integrated cover plate end plate and the second metal end plate;

the battery cell module comprises a battery cell module and is characterized by further comprising a cover plate mechanism arranged on the circumferential side wall of the battery cell module, the cover plate mechanism is used for coating the circumferential side wall of the battery cell module, the foam is arranged between the side wall of the battery cell module and the cover plate mechanism, and a thermosetting insulating adhesive tape is arranged between the upper surface and/or the lower surface of the battery cell module and the cover plate mechanism.

Preferably, the thickness of a single said foam is between 1mm and 2.5 mm.

Preferably, the thickness of the single double-sided adhesive tape is between 0.1mm and 0.12 mm.

Preferably, when the total thickness of all the battery blocks is A, the total thickness of the plurality of foam is greater than or equal to 0.08A and less than or equal to 0.12A.

Preferably, the thermosetting insulating adhesive tape is a tape coated with a flame-retardant thermosetting epoxy glue on a polyester film.

Preferably, at least three, at most 6, of the battery blocks form a group of battery block units.

Preferably, when three battery blocks form a group of battery block units, the battery cell module comprises 3N battery blocks, wherein N is a positive integer; when four battery blocks form a group of battery block units, the battery cell module comprises 4N battery blocks; when five battery blocks form a group of battery block units, the battery cell module comprises 5N battery blocks; when six battery blocks form a group of battery block units, the battery cell module comprises 6N battery blocks.

Preferably, the more battery blocks that form a group of battery block units, the greater the thickness of the single foam.

Preferably, the foam has adhesive on both sides.

The technical scheme of the utility model following beneficial effect that is showing has:

form a set of battery piece unit through at least three battery piece in this application, just so need not to set up the bubble cotton between each battery piece, the bubble cotton has certain minimum thickness, and too much setting up the bubble cotton can make whole electric core module's volume too big, and the shock resistance that the bubble cotton played is enough. The battery blocks in one battery block unit are bonded through double-sided adhesive tapes, so that the battery blocks in one battery block unit are integrated. The lateral wall of core module with battery core module causes the damage to apron mechanism or apron mechanism to battery core module when soft-packaged battery module receives the impact can be avoided to the bubble cotton between the apron mechanism, and effort between the two can obtain the buffering through the bubble cotton. The material of the thermosetting insulating adhesive tape has flame-retardant and insulating functions, and is matched with foam for use, so that complete insulating protection is formed in a circle around the battery cell module.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.

Fig. 1 is an exploded view of a pouch battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of a pouch battery module including a cell module according to an embodiment of the present invention;

fig. 3 is an exploded view of a first end plate mechanism in an embodiment of the present invention;

fig. 4 is a schematic structural view of a hoisting member in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of the first integrated cover plate, the second integrated cover plate and the flexible circuit board in the embodiment of the present invention;

fig. 6 is a schematic perspective view of a first housing of a cover plate mechanism according to an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

fig. 8 is a schematic perspective view of a second housing of the cover plate mechanism in an embodiment of the present invention;

fig. 9 is a schematic view of a first housing of a cover mechanism in an embodiment of the present invention in another embodiment.

Reference numerals of the above figures:

1. a cell module; 11. a battery block; 12. soaking cotton; 13. double-sided adhesive tape; 2. a first integrated cover plate; 21. a first integrated cover plate plastic cover; 211. a first rivet column; 212. a second riveting column; 213. a first buckle; 22. a first copper bar; 23. copper bar polar plate; 3. a first insulating end plate; 31. a body; 32. a notch; 33. an isolation section; 34. a blocking portion; 35. a support portion; 351. a hole; 36. a first clamping part; 4. a first metal end plate; 41. a first frame portion; 411. an opening; 42. a first extending portion; 43. a first transition portion; 431. a first transition first portion; 4311. embedding an inlet; 432. a first recess; 44. a first hoisting port; 45. a first positioning hole; 5. a second integrated cover plate; 6. a second insulating end plate; 7. a second metal end plate; 8. a cover plate mechanism; 81. a first housing; 811. a first side wall portion; 812. a second side wall portion; 813. a first deflection portion; 814. a first step portion; 815. a second deflection portion; 816. a second step portion; 817. a guide slope; 82. a second housing; 9. a flexible circuit board; 91. a first nickel plate; 92. a temperature measuring unit; 10. hoisting a piece; 101. a rod body; 102. a cross bar; 1021. a cylinder; 103. an embedding part.

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to optimize the structure of whole laminate polymer battery module, make it safer, compact, firm, proposed a laminate polymer battery module in this application, fig. 1 is the embodiment of the utility model provides an in the explosion chart of laminate polymer battery module, fig. 2 is the embodiment of the utility model provides an in the embodiment of the explosion chart of laminate polymer battery module including electric core module, as shown in fig. 1 and fig. 2, laminate polymer battery module includes: a cell module 1 including; the battery pack comprises a plurality of battery blocks 11, foam 12 and double-sided adhesive tapes 13 which are arranged, wherein at least three battery blocks 11 form a group of battery block 11 units, the foam 12 is arranged between every two adjacent battery block 11 units, and the adjacent battery blocks 11 in one battery block 11 unit are bonded through the double-sided adhesive tapes 13; the first end plate mechanism and the second end plate mechanism are respectively arranged at two ends of the cell module 1, the first end plate mechanism comprises a first integrated cover plate 2 end plate, a first insulating end plate 3 and a first metal end plate 4 which are sequentially arranged along the direction away from the cell module 1, the second end plate mechanism comprises a second integrated cover plate 5 end plate, a second insulating end plate 6 and a second metal end plate 7 which are sequentially arranged along the direction away from the cell module 1, the first integrated cover plate 2 end plate and the second integrated cover plate 5 end plate are used for guiding the flow of the cell module 1 and collecting state information, the first insulating end plate 3 is used for insulating and isolating the first integrated cover plate 2 end plate and the first metal end plate 4, and the second insulating end plate 6 is used for insulating and isolating the second integrated cover plate 5 end plate and the second metal end plate 7; the battery cell module comprises a cover plate mechanism 8 arranged on the circumferential side wall of a battery cell module 1, wherein the cover plate mechanism 8 is used for coating the circumferential side wall of the battery cell module 1, foam 12 is arranged between the side wall of the battery cell module 1 and the cover plate mechanism 8, and a thermosetting insulating adhesive tape is arranged between the upper surface and/or the lower surface of the battery cell module 1 and the cover plate mechanism 8.

Form a set of battery piece 11 unit through at least three battery piece 11 in this application, just so need not set up the bubble cotton 12 between each battery piece 11, bubble cotton 12 has certain minimum thickness, and too much setting up bubble cotton 12 can make whole electric core module 1's volume too big, and the shock resistance that bubble cotton 12 played is enough. The battery blocks 11 in one battery block 11 unit are bonded by the double-sided tape 13, so that the battery blocks 11 in one battery block 11 unit are integrated. The foam 12 between the side wall of the core module and the cover plate mechanism 8 can prevent the damage of the core module 1 caused by the core module 1 to the cover plate mechanism 8 or the cover plate mechanism 8 when the soft package battery module is impacted, and the acting force between the core module and the cover plate mechanism can be buffered through the foam 12. The thermosetting insulating tape is a material with flame retardant and insulating functions, and is matched with the foam 12 for use, so that complete insulating protection is formed in one circle around the battery cell module 1.

In order to better understand the pouch battery module in the present application, it will be further explained and illustrated below. As shown in fig. 1, the pouch battery module may include: a cell module 1; the first end cover mechanism and the second end cover mechanism are respectively arranged at two ends of the battery cell module 1; cover plate mechanism 8, and the like.

As shown in fig. 1, the first end cap mechanism may include a first integrated cover plate 2, a first insulating end plate 3 and a first metal end plate 4, which are sequentially disposed along a direction away from the cell module 1, the second end cap mechanism includes a second integrated cover plate 5, a second insulating end plate 6 and a second metal end plate 7, which are sequentially disposed along a direction away from the cell module 1, the first integrated cover plate 2 end plate and the second integrated cover plate 5 end plate are used for guiding the flow of the cell module 1 and collecting state information, the first insulating end plate 3 is used for insulating and isolating the first integrated cover plate 2 end plate and the first metal end plate 4, and the second insulating end plate 6 is used for insulating and isolating the second integrated cover plate 5 end plate and the second metal end plate 7. The cover plate mechanism 8 is arranged on the circumferential side wall of the battery cell module 1, the cover plate mechanism 8 is used for coating the circumferential side wall of the battery cell module 1, and the cover plate mechanism 8 is made of metal. The cover plate mechanism 8 is respectively connected with the first metal end plate 4 and the second metal end plate 7.

As shown in fig. 2, the cell module 1 may include a plurality of rows of battery blocks 11. The plurality of rows of cell blocks 11 are arranged in the thickness direction of the cell blocks 11, that is, in the horizontal direction. As a practical matter, the cell module 1 may be foamed with cotton 12 and double-sided adhesive 13, because the whole cell module 1 is in interference fit with the external cover plate mechanism 8, and at the same time, the cell module 1 needs to have certain impact resistance to protect the internal battery block 11. At least three battery blocks 11 form a group of battery block 11 units, foam 12 is arranged between the adjacent battery block 11 units, and the adjacent battery blocks 11 in one battery block 11 unit are bonded through double-sided adhesive tapes 13. Through the mode, at least three battery blocks 11 form a group of battery block 11 units, so that foam 12 does not need to be arranged between each battery block 11, the foam 12 has certain minimum thickness, the excessive arrangement of the foam 12 can cause the volume of the whole battery cell module 1 to be too large, and the impact resistance of the foam 12 is enough. The battery blocks 11 in one battery block 11 unit are bonded by the double-sided tape 13, so that the battery blocks 11 in one battery block 11 unit are integrated. The thickness of the double-sided adhesive tape 13 between the adjacent battery blocks 11 is only between 0.1MM and 0.12MM, which does not substantially increase the thickness of the unit of the battery blocks 11.

As feasible, as shown in fig. 2, foam 12 is disposed between the side wall of the cell module 1 and the cover plate mechanism 8, so that damage to the cover plate mechanism 8 or the cover plate mechanism 8 to the cell module 1 caused by the cell module 1 when the soft package battery module is impacted can be avoided, and an acting force between the two can be buffered through the foam 12.

It is possible to determine the thickness of the single foam 12 between the adjacent battery block 11 units according to the number of battery blocks 11 in one battery block 11 unit. The greater the number of battery blocks 11 in a unit of battery block 11, the greater the thickness of a single foam 12 between adjacent units of battery blocks 11. The thickness of the individual foam 12 may be between 1MM and 2.5 MM. When the total thickness of all the battery blocks 11 is a, the total thickness of the plurality of foam 12 is greater than or equal to 0.08A and less than or equal to 0.12A, so that the battery cell module 1 can bear the expansion deformation and the extrusion during the impact vibration in the later period of long-time use.

Generally, at least three and at most 6 battery blocks 11 form a group of battery block 11 units, the battery blocks 11 in the group of battery block 11 units are not easy to be too many, otherwise the weight of a single group of battery block 11 units is too large, and when an impact force is received too much, the foam 12 between adjacent battery block 11 units cannot play a sufficient buffer role, so that the number of battery block 11 units needs to be correspondingly increased, so that the impact force is buffered step by step through the multistage foam 12, and the huge acting force received by a single foam 12 is reduced.

As a practical matter, for example, when three battery blocks 11 form a set of battery block 11 units, the cell module 1 includes 3N battery blocks 11, where N is a positive integer; when four battery blocks 11 form a group of battery block 11 units, the battery cell module 1 includes 4N battery blocks 11; when five battery blocks 11 form a group of battery block 11 units, the battery cell module 1 includes 5N battery blocks 11; when six battery blocks 11 form a group of battery block 11 units, the cell module 1 includes 6N battery blocks 11.

As a practical matter, both sides of the foam 12 may have adhesive properties to adhesively fix the adjacent cell block 11 units. For example, both sides of the foam 12 may also be provided with double-sided adhesive tapes 13. As a practical matter, the foam 12 may include an insulating sheet that may serve as an insulating layer, and a cushioning sheet having a certain elasticity and contractibility that may serve to cushion the impact force.

It is possible to provide a heat-curing insulating tape between the upper and/or lower surface of the cell module 1 and the cover mechanism 8. A thermosetting insulating tape may be provided on the cover mechanism 8. Specifically, the thermosetting insulating tape is a tape formed by coating flame-retardant thermosetting epoxy glue on a polyester film, and the thermosetting insulating tape is flame-retardant and insulating. The epoxy glue is thermosetting mechanism glue, has good flame retardant property, has peeling strength and high temperature resistance after thermosetting, and has good insulating property. The thermosetting insulating adhesive tape and the cover plate mechanism 8 are bonded together through the curing epoxy glue. The thermosetting insulating adhesive tape has a good effect on insulating electrical equipment and components, and does not react with acid-base grease and the like. Moreover, compared with other materials, the thickness of the thermosetting insulating tape can be made very thin, and can reach about 0.3 MM. This point is incomparable with other materials, so can effectively reduce the volume of laminate polymer battery module.

As shown in fig. 3, the side wall of the first metal end plate 4 has at least two first lifting holes 44, the upper end surface of the first metal end plate 4 has at least two first positioning holes 45, the side wall of the second metal end plate 7 has at least two second lifting holes, and the upper end surface of the second metal end plate 7 has at least two second positioning holes.

Because first metal end plate 4 and second metal end plate 7 are made by the metal, generally adopt aluminium or aluminum alloy to make, its intensity is higher relatively, respectively offers two hoist and mount mouths through on two metal end plates to can directly cooperate the insertion with the metal end plate with hoist and mount piece 10 of a plurality of special construction when the laminate polymer battery module that needs transport equipment to accomplish. The locating hole is located the up end and faces upwards, and the position of the hoist and mount mouth is discerned to operating personnel of being convenient for like this or automatically controlled hoist and mount piece 10, and hoist and mount piece 10 also inserts to the locating hole simultaneously, can improve the stability after hoist and mount piece 10 hangs laminate polymer battery module like this, can effectively prevent to drop. Because the weight of package battery module is great, respectively set up two hoist and mount mouths on every metal end plate and can guarantee the stability when hoist and mount transport, also can avoid too big under the effect that a single hoist and mount mouth department of metal end plate bore, and then lead to the deformation of metal end plate hoist and mount mouth to and the deformation of whole metal end plate.

As shown in fig. 3, the two first lifting ports 44 are arranged in parallel and located at the same horizontal height, and the two second lifting ports are arranged in parallel and located at the same horizontal height, which is favorable for balancing the stress of the two lifting ports. Two first lifting ports 44 may be near the upper end of the first metal end plate 4 and two second lifting ports near the upper end of the second metal end plate 7. Through the structure, the first hoisting hole 44 is close to the first positioning hole 45, the second hoisting hole is close to the second positioning hole, the hoisting piece 10 can be conveniently inserted into the first positioning hole 45 and the first hoisting hole 44 of the first metal end plate 4, and the second positioning hole and the second hoisting hole of the second metal end plate 7. In addition, the axis of the first lifting hole 44 is perpendicular to the first insulating end plate 3, and the axis of the second lifting hole is perpendicular to the second insulating end plate 6. The axis of the first positioning hole 45 is arranged in the vertical direction, and the axis of the second positioning hole is arranged in the vertical direction.

Fig. 4 is a schematic structural diagram of the hoisting member in the embodiment of the present invention, as shown in fig. 4, the structure of the hoisting member 10 can be as follows: the rod body 101 extends along the vertical direction, the lower end of the rod body 101 is provided with an embedding part 103 matched with the hoisting port towards the horizontal direction, the middle part of the rod body 101 is provided with a cross rod 102 towards the horizontal direction, and a column 1021 which extends downwards along the vertical direction and is matched with the positioning hole is arranged below the cross rod 102. When the hoisting piece 10 is matched with the metal end plate for hoisting and carrying, the embedded part 103 is clamped into the hoisting opening, and the column body 1021 extends downwards into the positioning hole to realize positioning.

As shown in fig. 3, in order to facilitate the first positioning holes 45 to position the first lifting ports 44, the second positioning holes position the second lifting ports, and one first lifting port 44 and one first positioning hole 45 are located in the same vertical direction; and one second hoisting port and one second positioning hole are positioned in the same vertical direction.

As shown in fig. 3, in order to increase the stressed areas of the first lifting hole 44 and the second lifting hole and reduce the possibility of deformation of the metal end plate, the upper side wall of the first lifting hole 44 is a plane; the upper side wall of the second hoisting opening is a plane. For example, the first and

second ports

44, 44 may be rectangular in cross-section.

As a possibility, the first metal end plate 4 and the second metal end plate 7 may be machined by a profile forming process; the first metal end plate 4 and the second metal end plate 7 can also be formed by die-casting, and the interiors of the first metal end plate and the second metal end plate can be reinforced by adopting a reinforcing rib structure. Through the processing mode, the first metal end plate 4 and the second metal end plate 7 have the advantages of simple structure, light weight and good deformation resistance.

Specifically, as shown in fig. 3, the first metal end plate 4 includes a first frame portion 41 extending along a vertical plane, a first extending portion 42 extending along the vertical plane, and a first transition portion 43 extending along a horizontal direction, the first transition portion 43 connects the first extending portion 42 and the first frame portion 41, the first extending portion 42 is parallel to the first frame portion 41 and has a space, the first frame portion 41 is close to the cell module 1 relative to the first extending portion 42, the first hoisting opening 44 is located in the first extending portion 42, and the first positioning hole 45 is located in the first transition portion 43. The second metal end plate 7 includes a second frame portion extending along the vertical plane, a second extending portion extending along the vertical plane, and a second transition portion extending along the horizontal direction, the second transition portion is connected with the second extending portion and the second frame portion, the second extending portion is parallel to the second frame portion and has an interval, the second frame portion is close to the cell module 1 relative to the second extending portion, the second hoisting opening is located in the second extending portion, and the second positioning hole is located in the first transition portion 43.

In the above structure, the first transition portion 43 forms the upper side wall and one of the left and right side walls of the first hoist port 44; the second transition portion forms an upper sidewall of the second hoist opening and one of the left and right sidewalls. Like this afterwards, when hoist and mount piece 10 hoists laminate polymer battery module, whole laminate polymer battery module all concentrates on the last lateral wall of first hoist and mount mouth 44, on the last lateral wall of second hoist and mount mouth, the last lateral wall of first hoist and mount mouth 44, the last lateral wall of second hoist and mount mouth receives the ascending holding power of hoist and mount piece 10, when first transition 43 forms one of the left side wall and the right side wall of first hoist and mount mouth 44, the last lateral wall of first hoist and mount mouth 44 receives the left side wall or the right side wall that power can transmit to first hoist and mount mouth 44, the part that first transition 43 extends along vertical direction can bear huge vertical direction's power, consequently, can bear the ascending holding power of hoist and mount piece 10, and disperse it, in this process, can guarantee that whole hoist and mount mouth can not appear deforming. The second lifting hole is treated similarly, and is not described herein again. Through the structure, when the metal end plate is made of aluminum materials, the thickness of the metal end plate can reach 2MM at the minimum, and on the basis of reducing the materials, enough deformation resistance can be ensured.

As shown in fig. 3, the first transition portion 43 is formed with a first recess 432, and the first positioning hole 45 is located at the first recess 432. The second transition portion is provided with a second concave portion, and the second positioning hole is located at the second concave portion. The depressed part can carry on spacingly to the horizontal pole 102 of hoisting and hanging piece 10 for the horizontal pole 102 of hoisting and hanging piece 10 can be accurate cooperate with the metal end plate, thereby make the cylinder 1021 of hoisting and hanging piece 10 can be convenient stretch into to the locating hole in, simultaneously, after the cylinder 1021 of hoisting and hanging piece 10 stretched into to the locating hole, hoist and hang piece 10 and the difficult appearance of metal end plate and rock.

In order to facilitate the movement of the cross bar 102 of the sling 10 into the recess, the side of the first recess 432 facing away from the cell module 1 is open, and the left side or the right side of the first recess 432 is open. One side of the second recess, which is far away from the cell module 1, is open, and the left side or the right side of the second recess is open. The cross bar 102 of the sling 10 can be moved into the recess in the direction of the open sides of the recess.

Fig. 5 is the embodiment of the present invention provides a schematic structural diagram of the first integrated cover plate, the second integrated cover plate 5 and the flexible circuit board 9, as shown in fig. 5, the first integrated cover plate 2 end plate and the second integrated cover plate 5 end plate are used for guiding the flow of the cell module 1 and collecting the state information. The first integrated cover plate 2 end plate and the second integrated cover plate 5 end plate are respectively arranged at two ends of the battery cell module 1 and are close to the battery cell module 1.

As a possibility, as shown in fig. 5, the first integrated cover plate 2 comprises a first integrated cover plate plastic cover 21, a plurality of first copper bars 22 connected with the battery blocks 11. The second integrated cover plate 5 comprises a second integrated cover plate 5 plastic cover and a plurality of second copper bars connected with the battery blocks 11. The first integrated cover plate plastic cage 21 and the second integrated cover plate 5 plastic cage may be formed by an injection molding process. A plurality of first copper bars 22 are arranged along the arrangement direction of the battery blocks 11, a plurality of first copper bars 22 are respectively electrically connected with different battery blocks 11 in the battery cell module 1, a plurality of second copper bars are arranged along the arrangement direction of the battery blocks 11, and a plurality of second copper bars are respectively electrically connected with different battery blocks 11 in the battery cell module 1.

A plurality of first copper bars 22 are connected to the first integrated cover plate plastic cover 21 by a hot riveting process. And the plurality of second copper bars are connected to the plastic cover of the second integrated cover plate 5 through a hot riveting process.

As shown in fig. 5, the pouch battery module may include: the flexible circuit board 9 penetrating the upper end of the battery cell module 1 is connected to the first integrated cover plate plastic cover 21 through a hot riveting process at one end of the flexible circuit board 9, the other end of the flexible circuit board 9 is connected to the second integrated cover plate 5 plastic cover through a hot riveting process, and two ends of the flexible circuit board 9 are electrically connected with the first copper bar 22 and the second copper bar respectively.

Copper bar in this application is connected at integrated apron plastic casing through the hot riveting technology, the both ends of flexible circuit board 9 are connected at first integrated apron plastic casing 21 through the hot riveting technology respectively, it is fixed to realize on the integrated 5 plastic casings of apron of second, the hot riveting technology is connected and can be made the copper bar, flexible circuit board 9 once only fixes at integrated apron plastic casing through mechanized processing, and at whole in-process, need not to introduce connecting pieces such as other screw bolts, therefore, whole integrated apron plastic casing and copper bar, very compact between the flexible circuit board 9, it is pleasing to the eye, first integrated apron 2, the volume of the integrated apron of second 5 also can obtain minimizing of maximize. Moreover, the first integrated cover plate 2, the second integrated cover plate 5 and the flexible circuit board 9 are integrated, and low-voltage sampling can be performed through a wireless harness.

As shown in fig. 5, when the first copper bar 22 is not connected to the first integrated cover plate plastic cover 21 through the hot riveting process, one side of the first integrated cover plate plastic cover 21 facing the first copper bar 22 has a plurality of protruding first riveting columns 211, and the first copper bar 22 is provided with a plurality of first through holes corresponding to the first riveting columns 211. When the first copper bar 22 needs to be connected to the first integrated cover plate plastic cover 21, the first through holes of the first copper bar 22 are only required to be respectively sleeved on the first riveting columns 211 of the first integrated cover plate plastic cover 21, and then the first copper bar 22 is pressed by melting the first riveting columns 211 in a hot pressing manner, so that all the copper bars can be firmly connected with the first integrated cover plate plastic cover 21 only by hot pressing of once mechanical operation, and thus the processing efficiency can be greatly improved.

Similarly, when the second copper bar is not connected to the second integrated cover plate 5 plastic cover through the hot riveting process, the second integrated cover plate 5 plastic cover is provided with a plurality of third protruding riveting columns towards one side of the second copper bar, and the second copper bar is provided with a plurality of third through holes corresponding to the third riveting columns.

As shown in fig. 5, when one end of the flexible circuit board 9 is not connected to the first integrated cover plastic cover 21 through the hot riveting process, one side of the first integrated cover plastic cover 21 facing the first insulating end plate 3 has a plurality of protruding second rivet columns 212, and one end of the flexible circuit board 9 is provided with a plurality of second through holes corresponding to the second rivet columns 212. When the one end of flexible circuit board 9 need be connected on first integrated apron plastics cover 21 through the hot riveting technology, only need to establish the second through hole of flexible circuit board 9 one end respectively on a plurality of second riveting posts 212 of first integrated apron plastics cover 21, then melt a plurality of second riveting posts 212 through the mode of hot pressing and push down flexible circuit board 9, so, only need the hot pressing of once mechanized operation just can realize the firm connection of flexible circuit board 9 and first integrated apron plastics cover 21, so machining efficiency can obtain promotion by a wide margin.

Similarly, when the other end of the flexible circuit board 9 is not connected to the second integrated cover plate 5 plastic cover through the hot riveting process, one side of the second integrated cover plate 5 plastic cover facing the second insulating end plate 6 is provided with a plurality of convex fourth riveting columns, and the other end of the flexible circuit board 9 is provided with a plurality of fourth through holes corresponding to the fourth riveting columns.

As feasible, the flexible circuit board 9 may include a first nickel plate 91 and a second nickel plate located at two ends, the first nickel plate 91 is connected with the first copper bar 22 through laser welding, and the second nickel plate is connected with the second copper bar through laser welding. The flexible circuit board 9 is connected with the first copper bar 22 and the second copper bar in a laser welding mode without introducing connecting pieces such as other screws and bolts, and therefore the flexible circuit board 9 is very compact and attractive. In addition, the copper bar is more, and 9 tip of flexible circuit board need be connected respectively with a plurality of copper bars, adopts the mode of laser welding to adopt the accurate completion welding point of laser welding machine high efficiency, and the defective percentage is extremely low, and the assembly production efficiency of whole laminate polymer battery module can further improve.

As a practical matter, as shown in fig. 5, the flexible circuit board 9 may include a temperature measuring unit 92, and the temperature measuring unit 92 is attached to the electric core module 1 for temperature acquisition. The temperature acquisition of the battery cell module 1 can be realized more accurately by the method.

As shown in fig. 5, the left and right sides of the first integrated cover plate plastic cover 21 are respectively provided with a first buckle 213, and the left and right sides of the first insulating end plate 3 are respectively provided with a first buckle portion 36 matched with the first buckle 213. The left and right sides of the integrated apron 5 plastic housing of second has the second buckle respectively, and the left and right sides of the insulating end plate of second 6 has respectively with second buckle assorted second joint portion. The first clamping parts 36 on the left and right sides of the first insulation end plate 3 are respectively buckled into the first buckles 213 on the left and right sides of the first integrated cover plate plastic cover 21, so that the detachable connection of the first integrated cover plate plastic cover 21 and the first insulation end plate 3 is realized. The plastic cover of the second integrated cover plate 5 is similar to the second insulating end plate 6, and the description thereof is omitted.

As a practical matter, as shown in fig. 3, the end plate of the first integrated cover plate 2 may include two copper bar plates 23 extending in a direction away from the battery cell module 1, where one of the copper bar plates 23 is a positive electrode, and the other copper bar plate 23 is a negative electrode.

As shown in fig. 3, the first insulating plate may include a body 31 extending along a vertical plane, the body 31 has notches 32 opened at positions corresponding to the two copper bar plates 23, a lower edge of the notch 32 has a separating portion 33 extending along a direction away from the battery cell module 1, and an edge of the separating portion 33 has a blocking portion 34 extending upward along the vertical direction. When the copper bar polar plate 23 is embedded into the notch 32, the isolation part 33 is located below the copper bar polar plate 23, and the edge of the copper bar polar plate 23 abuts against the blocking part 34.

As shown in fig. 3, the first metal end plate 4 has an opening 411 formed at a position of the first frame portion 41 corresponding to the partition portion 33 and the stopper portion 34. When the partition 33 and the blocking portion 34 are inserted into the opening 411, the first transition 43 includes a first transition first portion 431 located below the partition 33 against the partition 33.

The laminate polymer battery module in this application stretches into breach 32 on the first insulation board through copper bar polar plate 23, last division 33 of first insulation board stretches into opening 411 on first metal end plate 4 again together with copper bar polar plate 23, thereby draw out copper bar polar plate 23 on the first integrated apron plastic casing 21, make it expose on first metal end plate 4 in laminate polymer battery module shell, so that laminate polymer battery module outside device can conveniently be connected rather than copper bar polar plate 23 when using, thereby be convenient for laminate polymer battery module's electric power output. Because the first metal end plate 4 in the laminate polymer battery module shell is made for conducting material, consequently, the first part 431 of first transition on the partition 33 on the first insulating plate separates copper bar polar plate 23 and the first metal end plate 4, and the blocking part 34 at the edge of partition 33 blocks the edge of copper bar polar plate 23 so that the edge of copper bar polar plate 23 can't contact the first transition 43 of first metal end plate 4. Therefore, the copper bar polar plate 23 is not easy to contact with the first metal end plate 4 of the soft package battery module, and the occurrence of events such as short circuit is avoided; in addition, the first transition portion first portion 431 of the first metal end plate 4 supports against the isolation portion 33, and the isolation portion 33 supports against the copper bar plate 23, so that the copper bar plate 23 has sufficient firmness and is not easy to loosen and deform.

As shown in fig. 3, the side of the body 31 of the first insulating plate, which is away from the cell module 1, has a support portion 35 extending in the vertical direction, and the support portion 35 is located at the lower end of the partition portion 33 and connected to the partition portion 33. The support 35 is intended to abut against the partition 33 so that the partition 33 can withstand greater pressure to avoid breaking thereof. Correspondingly, in order to enable a compact assembly of the first insulating plate with the first metal end plate 4, the first transition portion first part 431 has an insertion opening 4311 which receives part of the support portion 35. For example, the upper end of the support portion 35 has a semi-cylindrical shape, and the lower end of the support portion 35 has an inverted triangular shape in a plane in the extending direction of the first insulating end plate 3. Through this structure can effectively improve the support intensity of supporting part 35, avoid appearing deformation between supporting part 35 and the body 31.

As shown in fig. 3, the supporting portion 35 has a hole 351 extending in a vertical direction, and the copper bar plate 23 has an opening, where the hole 351 is located corresponding to the opening. The holes 351 provide the space required for the connection structure for the wires to be connected to the copper bar plate 23 through the openings.

As a possibility, as shown in fig. 3, one first lifting port 44 and a corresponding one of the positioning holes abut against the first transition portion first part 431. When the first transition portion 43 is provided with a first recess portion 432, and the first positioning hole 45 is located at the first recess portion 432, one side of the first recess portion 432 close to the opening 411 is open. In order to reduce the possibility that the wire connected to the copper bar plate 23 contacts the first transition portion 43 on the side of the first lifting hole 44 of the first metal end plate 4, the part of the blocking portion 34 close to the transition portion blocks the height of the first recess portion 432 beyond the first recess portion 432. Preferably, the height of the partial barrier 34 next to the transition may also be the same as the height of the first insulating plate.

As shown in fig. 3, in order to reduce the weight of the first insulating plate, a plurality of lightening holes may be opened in the body 31 of the first insulating plate. Preferably, the lightening holes may be located between adjacent copper bars on the first integrated cover plate 2, so as to avoid the occurrence of electric leakage due to conduction between the copper bars and the first metal end plate 4.

As shown in fig. 1, the cover mechanism 8 is disposed on the circumferential side wall of the cell module 1, and the cover mechanism 8 is configured to coat the circumferential side wall of the cell module 1. As a practical matter, fig. 6 is a schematic perspective view of a first housing of a cover plate mechanism in an embodiment of the present invention, fig. 7 is a partial enlarged view of a portion a in fig. 6, and fig. 8 is a schematic perspective view of a second housing of the cover plate mechanism in an embodiment of the present invention, as shown in fig. 6 to 8, the cover plate mechanism 8 may include a first housing 81 and a second housing 82, the first housing 81 includes a first side wall portion 811 and a second side wall portion 812, a top end edge of the first side wall portion 811 and a top end edge of the second side wall portion 812 are deflected toward the battery cell module 1 to form a first deflection portion 813, so that the top ends of the first side wall portion 811 and the second side wall portion 812 form a first step portion 814, a lower end of the second housing 82 is embedded into the first step portion 814, and a depth of the first step portion 814 is the same as a lower end thickness of the second housing 82.

In the above structure, the foam 12 is provided between the cell module 1 and each of the first and second

side wall portions

811 and 812.

The structure of the outer frame of the existing soft package battery module is generally in an opening shape and can be formed by welding and fixing two half shells. In order to make the welding secure and to make the alignment of the two half-shells more precise, the edge of one of the half-shells will have a longitudinal notch 32, facilitating the insertion of the other half-shell. This is so that the half shell with the elongated notch 32 will have a lower thickness at the notch 32, a lower strength and a lower strength after welding of the two half shells. If the thickness of the half shell is increased, on one hand, the whole metal plastic film frame becomes large in volume, and more importantly, metal plastic film frame materials are greatly wasted, the cost is increased, therefore, the thicknesses of other positions of the half shell are completely satisfactory in strength, and the thicknesses of the positions are not meaningful to be increased together.

In the present application, the top edges of the first side wall 811 and the second side wall 812 of the first casing 81 are deflected toward the cell module 1 to form a first deflection portion 813, and since the foam 12 capable of compressing and contracting is respectively disposed between the cell module 1 and the first side wall 811 and between the cell module 1 and the second side wall 812, at the first deflection portion 813, the foam 12 is partially compressed, the other places of the first side wall 811 and the second side wall 812 can still be tightly attached to the foam 12, the foam 12 is tightly attached to the cell module 1 at the same time, and the first deflection portion 813 deflected toward the cell module 1 direction does not cause a gap between the cell module 1 and the first side wall 811 and the second side wall 812, thereby ensuring the impact resistance of the cell module 1. Meanwhile, the existence of the first offset portion 813 does not cause the wall thicknesses of the first side wall portion 811 and the second side wall portion 812 at the welding position with the second housing 82 to be thin, so that the strength after the first housing 81 is connected with the second housing 82 can be effectively ensured.

After the lower end of the second housing 82 is inserted into the first step 814 of the first housing 81, the first step 814 of the first housing 81 and the lower end of the second housing 82 are welded together by using an edge seal, so that the first housing 81 and the second housing 82 are connected together. The thicknesses of the first side wall portion 811 and the second side wall portion 812 of the first housing 81 at the first offset portion 813 are still unchanged, and the strength of edge sealing welding at the first step portion 814 of the first housing 81 and the lower end of the second housing 82 is effectively ensured.

Since the first offset portions 813 are directly offset at the top edges of the first and second

side wall portions

811 and 812, and are not cut to reduce the thickness, the thickness of the first offset portions 813 can be made substantially the same as the thickness of the main portions of the first and second

side wall portions

811 and 812.

In general, the thickness of the second housing 82 is the same as the thickness of the first housing 81 for the sake of processing convenience, and therefore, the thickness of the lower end of the second housing 82 is the same as the thickness of the main body portion of the first side wall portion 811 and the thickness of the main body portion of the second side wall portion 812. In order to make the joint surface of the first housing 81 and the second housing 82 smooth and flat after the lower end of the second housing 82 is fitted into the first step 814 of the first housing 81, the first offset portion 813 is offset from the main body of the first side wall portion 811 by a distance equal to the thickness of the lower end of the second housing 82.

If the top edges of the first side wall portion 811 and the second side wall portion 812 of the first casing 81 are deflected in the direction away from the battery cell module 1 to form the first deflection portion 813, even if the lower end of the second casing 82 is embedded into the first step portion 814 of the first casing 81 and then subjected to edge sealing welding, the first deflection portion 813 protrudes a circle on the surface of the whole cover plate mechanism 8, which may cause the outer surface of the pouch battery module to be very unsightly and not completely smooth.

After the top edges of the first side wall portion 811 and the second side wall portion 812 of the first casing 81 are deflected toward the cell module 1 to form the first deflection portion 813, both sides of the foam 12 are closely attached to the first side wall portion 811 and the cell module 1, and the first deflection portion 813 compresses the foam 12 so that the thickness of the foam 12 corresponding to the first deflection portion 813 is smaller than that of the other portions; the two sides of the foam 12 are closely attached to the second side wall portion 812 and the battery cell module 1, and the first offset portion 813 compresses the foam 12 so that the thickness of the foam 12 corresponding to the first offset portion 813 is smaller than that of the other portions.

Similarly, fig. 9 is a schematic diagram of the first housing of the cover plate mechanism in an embodiment of the present invention in another implementation, and as shown in fig. 9, the first side wall portion 811 and the second side wall portion 812 are respectively deflected towards the edges of the two ends of the first metal end plate 4 and the second metal end plate 7 to form a second deflection portion 815 in the direction of the battery cell module 1, so that the two ends of the first side wall portion 811 and the second side wall portion 812 form a second step portion 816. The edges of the first metal end plate 4 and the second metal end plate 7 facing the first side wall portion 811 and the second side wall portion 812 have an interface into which the second step portion 816 can be fitted.

When the first metal end plate 4 and the second metal end plate 7 are respectively embedded into the second step portions 816 formed at the two ends of the first side wall portion 811 and the second side wall portion 812 at the interfaces of the edges of the first side wall portion 811 and the second side wall portion 812, the first metal end plate 4 and the second step portions 816 of the first side wall portion 811 and the second side wall portion 812 can be welded by using edge sealing, and the second metal end plate 7 and the second step portions 816 of the first side wall portion 811 and the second side wall portion 812 can be welded by using edge sealing. Similarly, the second offset portions 815 of the first side wall portion 811 and the second side wall portion 812 compress only a part of the foam 12, the other parts of the first side wall portion 811 and the second side wall portion 812 can still be tightly attached to the foam 12, the foam 12 is tightly attached to the cell module 1 at the same time, and the second offset portions 815 formed by offsetting towards the direction of the cell module 1 do not cause gaps between the cell module 1 and the first side wall portion 811 and the second side wall portion 812, thereby ensuring the impact resistance of the cell module 1.

In order to enable the interface between the first metal end plate 4 and the second metal end plate 7 to be conveniently embedded into the second step portions 816 formed at the two ends of the first side wall portion 811 and the second side wall portion 812, the outer side walls of the first side wall portion 811 and the second side wall portion 812 facing the two ends of the first metal end plate 4 and the second metal end plate 7 respectively have guide inclined planes 817, and under the action of the guide inclined planes 817, the interface between the first metal end plate 4 and the second metal end plate 7 can smoothly slide into the second step portions 816 formed at the two ends of the first side wall portion 811 and the second side wall portion 812.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a laminate polymer battery module, its characterized in that, laminate polymer battery module includes:

2. The laminate battery module as claimed in claim 1, wherein the thickness of the single foam is between 1mm and 2.5 mm.

3. The pouch battery module as defined in claim 1, wherein the thickness of the single double-sided adhesive tape is between 0.1mm and 0.12 mm.

4. The laminate battery module as recited in claim 1, wherein when the total thickness of all the battery blocks is A, the total thickness of the plurality of foam is greater than or equal to 0.08A and less than or equal to 0.12A.

5. The laminate battery module according to claim 1, wherein the thermosetting insulating tape is a tape coated with a flame-retardant thermosetting epoxy glue on a polyester film.

6. The laminate battery module according to claim 1, wherein at least three, and at most 6, of the battery blocks form a group of battery block units.

7. The laminate battery module as recited in claim 1, wherein when three battery blocks form a group of battery block units, the cell module comprises 3N battery blocks, N is a positive integer; when four battery blocks form a group of battery block units, the battery cell module comprises 4N battery blocks; when five battery blocks form a group of battery block units, the battery cell module comprises 5N battery blocks; when six battery blocks form a group of battery block units, the battery cell module comprises 6N battery blocks.

8. The laminate battery module of claim 1, wherein the more battery blocks form a group of battery block units, the greater the thickness of the foam.

9. The laminate battery module as claimed in claim 1, wherein the foam has adhesive on both sides.