CN210866327U

CN210866327U - Soft packet of power battery module of passenger car

Info

Publication number: CN210866327U
Application number: CN201922439176.8U
Authority: CN
Inventors: 胡博
Original assignee: China Automotive Battery Research Institute Co Ltd
Current assignee: China Automotive Battery Research Institute Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-06-26
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a passenger car soft packet of power battery module, it includes soft packet of power battery group assembly, electricity connection assembly, welt assembly and module shell, electricity connection assembly and welt assembly are assembled on the soft packet of power battery group assembly, soft packet of power battery group assembly after the equipment, electricity connection assembly and welt assembly are whole to be arranged in the module shell. The utility model provides a soft packet of power battery module of passenger car, it has satisfied standard dimension specification's soft packet of power battery module structure, provides a safety, efficient battery module heat conduction mode simultaneously.

Description

Soft packet of power battery module of passenger car

Technical Field

The utility model relates to a power battery technical field, concretely relates to soft packet of power battery module of passenger car.

Background

The power battery module consists of a plurality of power battery monomers connected in series and in parallel, a structural part, a high-low voltage connecting structure and a thermal management executing structure, the specification and the size of the power battery module of the electric passenger vehicle are advocated by the China automobile industry Association at present, and the purpose of promoting the construction of a power battery comprehensive technical standard system and the whole standardization construction work of the power battery comprehensive technical standard system is achieved.

The soft package single battery is a lithium ion power battery taking an aluminum plastic film as an outer package; has the advantages of small volume, light weight, high specific energy, high safety, flexible design and the like. Because the soft package power battery adopts the plastic-aluminum membrane as the extranal packing, the battery physique is soft, difficult fixed, and it bears mechanical load ability poor, very easily appears the surface deformation such as mar, pit, fold, has proposed higher requirement for module structural design work.

The key of the soft package power battery grouping lies in that the monomer is fixedly installed on a corresponding mechanical structure, the electrical connection is safe and reliable, and the material is fireproof, flame-retardant and light-weighted, so that the soft package power battery has higher energy density on the premise of meeting the use function.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a passenger car laminate polymer power battery module, its laminate polymer power battery module structure that has satisfied standard dimension specification provides a safety, efficient battery module heat conduction mode simultaneously.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a soft packet of power battery module of passenger car, its includes soft packet of power battery group assembly, electricity connection assembly, welt assembly and module shell, electricity connection assembly and welt assembly are assembled on the soft packet of power battery group assembly, electricity connection assembly and the welt assembly after the equipment are whole to be arranged in the module shell.

Preferably, the soft package power battery pack assembly is formed by sticking a plurality of power battery monomers and a corresponding number of insulating elastic layers into a whole, wherein the insulating elastic layers are arranged between the power battery monomers and on two outer sides of the power battery assembly.

Preferably, the power battery monomer is a soft package lithium ion power battery, and the positive and negative electrode tab guide handles are positioned at two ends.

Preferably, the insulating elastic layer is double-sided adhesive tape.

Preferably, the electric connection assembly comprises an electrode end electric connection assembly and a series connection end electric connection assembly, the electrode end electric connection assembly is fixed to one end of the soft package power battery pack assembly in the two opposite ends, and the series connection end electric connection assembly is fixed to the other end.

Preferably, the electrode end electric connection assembly consists of a substrate I, a positive terminal, a negative terminal series bus bar I, a signal acquisition board I and a protection cover board I; the substrate I is provided with a group of buckles for fixedly mounting the positive terminal, the negative terminal and the serial bus bar I; the substrate is also provided with long openings corresponding to the number and the positions of the battery cores, and the tabs respectively penetrate through the corresponding long openings to be bent to form electric connection; the signal acquisition board I is bonded on the substrate I and used for acquiring voltage signals corresponding to the number of the battery cells connected in series; the protective cover plate I is buckled on the base plate I and used for forming insulation protection and electrical protection on high-voltage and low-voltage electrified parts.

Preferably, the series end electric connection assembly consists of a base plate II, a series bus bar II, a signal acquisition plate II and a protective cover plate II; a group of buckles for fixedly mounting the serial bus bar II are arranged on the substrate II; the substrate II is also provided with long openings corresponding to the number and the positions of the battery cells, and the tabs respectively penetrate through the corresponding long openings and are bent to form electric connection; the signal acquisition board II is bonded on the substrate II and used for acquiring voltage signals corresponding to the number of the battery cells connected in series; and the protective cover plate II is buckled on the base plate II and is used for forming insulation protection and electrical protection on the high-voltage and low-voltage electrified part.

Preferably, the lining plate assembly is positioned at the upper part of the soft package power battery pack assembly and consists of a lining plate and a signal transmission plate, the lining plate has insulativity and is provided with a plurality of circular through holes for integral glue filling and fixing, and a group of grooves and clamping points for installing and fixing the signal transmission plate are reserved in the middle position of the lining plate;

the signal transmission board is installed on the lining board, is connected with two signal acquisition boards integrated on the electric connection assembly, and transmits the signals acquired by the signal acquisition board I to the signal acquisition board II for summarizing and outputting.

Preferably, the module shell comprises a square cylinder, an end cover plate I and an end cover plate II, wherein:

the square barrel is of a barrel-shaped structure which is integrally formed and is provided with openings at two ends, and is used for accommodating and protecting components in the battery module; a plurality of heat-conducting structural adhesive circular holes for filling the module are transversely arranged in the middle of the bottom of the square cylinder, and the inner surface of the bottom of the square cylinder is provided with wave-shaped bulges which correspond to the gaps of the power battery monomers and play a supporting role;

the end cover plate I is welded at one end of the square cylinder and serves as an electrode side shell of the soft package power battery module of the passenger vehicle, and is welded with the square cylinder, and openings corresponding to positive and negative terminals are reserved;

and the end cover plate II is used as an outer shell of the serial side of the battery module and is welded with the square cylinder, and an opening corresponding to the position of the signal output assembly is reserved.

The utility model provides a soft packet of power battery module of passenger car, it has following technological effect:

1. the soft package single battery and the insulating elastic layer are bonded at intervals to form a whole, so that the integral rigidity of the battery module is improved; the insulating elastic layer provides certain mechanical buffering protection and insulating safety protection for a single battery, can provide certain structure pretightning force when wholly compressing tightly, improves module cycle life, and the isolation that adds thermal-insulated flame retardant material in the insulating elastic layer can realize heat transfer and thermal diffusion between the monomer simultaneously.

2. The battery module shell is divided into three parts, namely a square barrel at the middle part and end cover plates at two ends, and the battery module shell is integrated through a welding mode after combination, so that reliable mechanical protection can be provided for internal single batteries and high-low voltage electrical connection.

3. The square cylinder in the battery module shell is filled with the gaps of the single batteries in a glue filling mode, the glue has better bonding force and structural strength after being cured, the overall rigidity of the battery module can be improved, and meanwhile, under the action of long-period fatigue loads such as vibration, the abrasion and the damage of the shell to the single batteries can be effectively prevented.

4. The square cylinder is filled with the clearance of monomer battery through the encapsulating mode in the battery module shell, and the colloid has good mobility, effectively fills the clearance of casing and monomer battery, forms indirect contact, has good heat conductivility after the colloid solidification simultaneously, makes the high-efficient conduction of heat that the monomer battery produced to the module shell in the operation.

5. The clearance of square section of thick bamboo and battery cell fills through the encapsulating mode among the battery module shell, and the colloid has good insulating nature, can form abundant insulation protection to battery cell, prevents electrical failure such as short circuit, and simultaneously, the good fire behaviour of colloid effectively keeps apart thermal diffusion when battery cell takes place the thermal runaway.

6. The collection and transmission of low-voltage signals (voltage and temperature) in the battery module are completed by the circuit board, and the battery module has the characteristics of high reliability, easiness in positioning and the like, and avoids risks of insulation failure, abrasion short circuit failure and the like caused by using a lead.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

Fig. 1 is a schematic structural view of a passenger vehicle soft package power battery module provided by an embodiment of the present invention;

fig. 2 is an exploded view of a soft package power battery module of a passenger vehicle provided in an embodiment of the present invention;

fig. 3 is a schematic view of a general decomposition structure of a power battery pack in a passenger car soft package power battery module provided by the embodiment of the invention;

fig. 4 is a schematic structural view of an electrode terminal electric connection assembly in a passenger vehicle soft package power battery module provided by the embodiment of the present invention;

fig. 5 is a schematic structural view of a series end electrical connection assembly in a passenger vehicle soft package power battery module provided in an embodiment of the present invention;

fig. 6 is a schematic structural view of a liner plate assembly in a passenger car soft package power battery module provided in an embodiment of the present invention;

fig. 7 is the embodiment of the utility model provides a module shell decomposition structure schematic diagram in soft packet of power battery module of passenger car.

Description of reference numerals:

10. a power battery pack assembly; 20. the electrode end is electrically connected with the assembly; 30. a series end electrical connection assembly; 40. a liner plate assembly; 50. a square cylinder; 60. an end cover plate I; 70. an end cover plate II; 80. curing the molded heat-conducting structure colloid; 101. soft package of power battery monomer; 102. an intermediate insulating elastic layer; 103. two side insulating elastic layers; 201. a substrate I; 202. a positive terminal; 203. a negative terminal; 204. a serial bus I; 205. a signal acquisition board I; 206. a protective cover plate I; 301. a substrate II; 302. a serial bus II (the structure of which is the same as that of the serial bus I204); 303. a signal acquisition board II; 304. a protective cover plate II; 401. a liner plate; 402. a signal transmission plate; 501. filling glue holes; 502. a wave-shaped bulge; 601. the positive and negative terminals are opened; 701. a signal output assembly opening; 2011. a substrate I is buckled; 2012. the substrate I is provided with a long opening; 3011. a substrate II is buckled; 3012. the substrate II is provided with a long opening; 4011. grouting glue holes in the lining plate; 4012. signal transmission board mounting structure.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.

As shown in fig. 1 and 2, the passenger car soft package power battery module comprises a soft package power battery pack assembly 10, an electric connection assembly, a lining plate assembly 40 and a module shell, wherein the electric connection assembly and the lining plate assembly 40 are assembled on the soft package power battery pack assembly 10, and the assembled soft package power battery pack assembly 10, the electric connection assembly and the lining plate assembly 40 are integrally arranged in the module shell.

As shown in fig. 3, the soft-package power battery pack assembly 10 is formed by bonding a plurality of power battery cells 101 and a corresponding number of insulating

elastic layers

102 and 103 into a whole, wherein the insulating elastic layer 102 is disposed between the power battery cells 101, and the insulating elastic layers 103 are disposed on two outer sides of the power battery assembly 10.

The power battery monomer 101 is a soft-package lithium ion power battery, and positive and negative electrode tab guide handles are located at two ends.

The insulating

elastic layers

102 and 103 are both double-sided back glue and are respectively adhered between the power battery monomers and outside the power battery monomers, so that an integral power battery assembly is formed.

As shown in fig. 4 and 5, the electrical connection assembly includes an electrode terminal electrical connection assembly 20 and a series terminal electrical connection assembly 30, the electrode terminal electrical connection assembly 20 is fixed on one of the two opposite ends of the soft-package power battery pack assembly 10, and the series terminal electrical connection assembly 30 is fixed on the other end.

As shown in fig. 4, the electrode terminal electrical connection assembly 20 is composed of a substrate i 201, a positive terminal 202, a negative terminal 203, a serial bus bar i 204, a signal acquisition board i 205, and a protective cover board i 206. A group of buckles 2011 for fixedly mounting the positive and negative terminals 202 and 203 and the serial bus I204 are arranged on the substrate I201; the substrate 201 also has long openings 2012 corresponding to the number and position of the battery cells, and the tabs respectively penetrate through the corresponding long openings and are bent to form electrical connections. The signal acquisition board I205 is bonded on the substrate I201 and used for acquiring voltage signals corresponding to the number of the battery cells connected in series. The protective cover plate I206 is buckled on the base plate I201 and used for forming insulation protection and electric protection for high-voltage and low-voltage electrified parts.

As shown in fig. 5, the series-end electrical connection assembly 30 is composed of a substrate ii 301, a series bus ii 302 (having the same structure as the series bus i 204), a signal acquisition board ii 303, and a protective cover board ii 304. A group of buckles 3011 for fixedly mounting the serial bus II 302 are arranged on the substrate II 301; the substrate II 301 is further provided with long openings 3012 corresponding to the number and positions of the battery cells, and the tabs respectively penetrate through the corresponding long openings and are bent to form electrical connection. The signal acquisition board II 303 is bonded on the substrate II 301 and is used for acquiring voltage signals corresponding to the number of the battery cells connected in series; and the protective cover plate II 304 is buckled on the base plate II 301 and is used for forming insulation protection and electric protection on high-voltage and low-voltage electrified parts.

As shown in fig. 6, the lining plate assembly 40 is located at the upper part of the soft package power battery pack assembly 10, the lining plate assembly 40 is composed of a lining plate 401 and a signal transmission plate 402, the lining plate 401 has insulation properties, a plurality of circular through holes 4011 for integral glue filling and fixing are distributed on the lining plate 401, and a group of grooves and clamping points 4012 for installing and fixing the signal transmission plate 402 are reserved in the middle position of the lining plate 401.

The signal transmission board 402 is installed on the lining board 40 as described above, and is connected with two signal acquisition boards integrated on the electrical connection assembly, and transmits the signal acquired by the signal acquisition board i 205 to the signal acquisition board ii 303 for summary output.

As shown in fig. 7, it is characterized in that the module housing is composed of a square cylinder 50, an end cover plate i 60 and an end cover plate ii 70, wherein:

the square tube 50 has an integrally formed cylindrical structure with both ends open, and is used for accommodating and protecting the internal components of the battery module. The middle position of the bottom of the square tube 50 is transversely provided with a plurality of round holes 501, the round holes 501 are used for pouring heat-conducting structural adhesive into the module, the heat generated by the battery core can be conducted to the outside of the module through the adhesive filling, and the rigidity of the whole structure is improved, so that the square tube 50 is processed by using a material with certain structural strength and good heat conduction. The inner surface of the lower bottom of the square cylinder 50 is provided with a wave-shaped bulge 502, and the wave-shaped bulge 502 corresponds to the gap of the power battery monomer 101 and plays a supporting role.

The end cover plate I60 is welded at one end (corresponding to the electrode end electric connection assembly) of the square cylinder 50 and serves as an end shell for protecting internal components of the battery module. The end cover plate I60 is used as a battery module electrode side shell and welded with the square cylinder 50, and openings 601 corresponding to the positive and negative terminals are reserved.

The end cover plate II 70 is used as a shell on the serial side of the battery module and welded with the square cylinder 50, and an opening 701 corresponding to the position of the signal output assembly is reserved.

As shown in fig. 2, the molded heat conducting structure pouring sealant 80 is filled at the shown position.

The assembling steps of the passenger vehicle soft package power battery module are briefly described below with reference to the accompanying drawings and specific embodiments:

in the embodiment shown in fig. 1, the power battery cells 101 and the insulating elastic layer 102 are alternately placed and adhered to each other to form a whole, and the insulating elastic layer 103 is adhered to both outer sides to form the power battery assembly 10. And (3) installing the electrode end electric connection assembly 20 and the series end electric connection assembly 30 according to the polarity of the power battery assembly to finish high-voltage connection, and installing the lining plate assembly 40 to finish low-voltage connection. And then the whole is arranged into a square cylinder 50, heat-conducting structural adhesive is poured through a glue pouring hole 501, the heat-conducting structural pouring adhesive 80 is formed through curing, an end cover plate I60 is welded on the electrode side, and an end cover plate II 70 is welded on the serial side.

The soft packet of power battery module of passenger car that this embodiment provided, it has following technological effect:

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. The utility model provides a soft packet of power battery module of passenger car which characterized in that, includes soft packet of power battery group assembly, electricity connection assembly, welt assembly and module shell, electricity connection assembly and welt assembly are assembled on the soft packet of power battery group assembly, electricity connection assembly and the welt assembly after the equipment are whole to be arranged in the module shell.

2. The passenger vehicle soft package power battery module according to claim 1, wherein the soft package power battery assembly is integrally bonded by a plurality of power battery cells and a corresponding number of insulating elastic layers, and the insulating elastic layers are arranged between the power battery cells and on two outer sides of the power battery assembly.

3. The passenger car soft package power battery module according to claim 2, wherein the power battery monomer is a soft package lithium ion power battery, and positive and negative electrode tab guide handles are located at two ends.

4. The soft packet of power battery module of passenger car of claim 3, characterized in that, the insulating elastic layer is two-sided gum.

5. The power battery module of soft package of passenger car of claim 1, characterized in that, the electricity connection assembly includes electrode terminal electricity connection assembly and series connection end electricity connection assembly, electrode terminal electricity connection assembly fixes on soft package power battery pack assembly just one in the opposite both ends, series connection end electricity connection assembly fixes on the other end.

6. The passenger vehicle soft package power battery module as claimed in claim 5, wherein the electrode terminal electrical connection assembly is composed of a substrate I, a positive terminal, a negative terminal, a serial bus bar I, a signal acquisition board I and a protective cover board I; a group of buckles for fixedly mounting the positive and negative terminals and the serial bus bar I are arranged on the substrate I; the substrate is also provided with long openings corresponding to the number and the positions of the battery cores, and the tabs respectively penetrate through the corresponding long openings to be bent to form electric connection; the signal acquisition board I is bonded on the substrate I and used for acquiring voltage signals corresponding to the number of the battery cells connected in series; the protective cover plate I is buckled on the base plate I and used for forming insulation protection and electrical protection on high-voltage and low-voltage electrified parts.

7. The passenger vehicle soft package power battery module as claimed in claim 6, wherein the series end electrical connection assembly is composed of a base plate II, a series busbar II, a signal acquisition plate II and a protective cover plate II; a group of buckles for fixedly mounting the serial bus bar II are arranged on the substrate II; the substrate II is also provided with long openings corresponding to the number and the positions of the battery cells, and the tabs respectively penetrate through the corresponding long openings and are bent to form electric connection; the signal acquisition board II is bonded on the substrate II and used for acquiring voltage signals corresponding to the number of the battery cells connected in series; and the protective cover plate II is buckled on the base plate II and is used for forming insulation protection and electrical protection on the high-voltage and low-voltage electrified part.

8. The passenger vehicle soft package power battery module as claimed in claim 7, wherein the lining plate assembly is located at the upper part of the soft package power battery assembly, the lining plate assembly is composed of a lining plate and a signal transmission plate, the lining plate has insulation property, a plurality of circular through holes for integral glue filling and fixing are distributed on the lining plate, and a group of grooves and clamping points for installing and fixing the signal transmission plate are reserved in the middle position of the lining plate;

9. The soft packet of power battery module of passenger car of claim 1, characterized in that, the module shell comprises square section of thick bamboo, end cover board I and end cover board II, wherein: