CN111490209A - A soft pack battery module and a new energy vehicle - Google Patents

Abstract

The invention relates to the technical field of batteries, and discloses a soft pack battery module and a new energy vehicle. The pouch battery module includes a cell assembly, a plastic frame assembly and a printed circuit board assembly, wherein the cell assembly includes a plurality of pouch cells stacked along the length of the pouch battery module. The tabs of the soft-pack battery extend along the width direction of the soft-pack battery module; the plastic frame assembly includes a bottom cover assembly and a plastic frame component connected with the bottom cover component and extending along the length direction of the soft-pack battery module, the plastic frame assembly A plurality of through-slots extending along the height direction of the soft-pack battery module are arranged on the upper part, and the tabs of each soft-pack battery core are pierced in each through-slot in a one-to-one correspondence. The invention makes the connection between the tab and the plastic frame assembly more convenient and quicker by providing the through slot, reduces the assembly time as a whole, improves the grouping efficiency of the soft-pack battery module, and further reduces the soft-pack battery module. overall production cost.

Description

A soft pack battery module and a new energy vehicle

technical field

The invention relates to the technical field of batteries, in particular to a soft pack battery module and a new energy vehicle.

Background technique

With the wide application of pouch cells in new energy vehicles, the group size of pouch cells has become larger and larger, especially recently, the frequency of battery CTP has become higher and higher, and various battery manufacturers and new energy vehicle manufacturers The large module is also set as the direction of the battery pack module in the future. CTP, or Cell to PACK, is the direct integration of cells into battery packs, thus eliminating the need for intermediate modules. At present, there are two technical routes for CTP. One is to use a completely module-free method, and the other is to replace small modules with large modules. At present, the CTP composed of soft-packed cells basically replaces small modules with large modules, and seldom adopts the completely module-free method and can meet the requirements of IP67.

At present, no matter which grouping method is used, the tabs of the soft-packed cells need to be perforated to be welded with the plastic frame. Because the tabs of the soft-packed cells are usually soft and the number of large module cells is large Therefore, during assembly, it is difficult to accurately perforate the tabs of a plurality of soft-packed cells at the same time, resulting in the need to spend a lot of time on the perforation operation of the tabs.

Therefore, there is an urgent need for a soft pack battery module to solve the above problems.

SUMMARY OF THE INVENTION

Based on the above, the purpose of the present invention is to provide a soft pack battery module and a new energy vehicle, which facilitates the installation of the tabs, effectively improves the production efficiency, and reduces the manufacturing cost.

For achieving the above object, the present invention adopts the following technical solutions:

A soft pack battery module, comprising:

a battery cell assembly, comprising a plurality of soft-packed cells stacked along the length direction of the soft-packed battery module, and the tabs of the plurality of soft-packed cells extend along the width direction of the soft-packed battery module;

The plastic frame assembly includes a bottom cover assembly and a plastic frame assembly connected with the bottom cover assembly and extending along the length direction of the soft pack battery module, the plastic frame assembly is provided with a plurality of along the soft pack battery The through-slots extending in the height direction of the module, and the tabs of each of the soft-packed cells are pierced in each of the through-slots in a one-to-one correspondence.

As a preferred solution of a soft-pack battery module, the plastic frame assembly includes a plastic frame extending along the length direction of the soft-pack battery module and a plurality of bus bars disposed on the front of the plastic frame. Connected with the bottom cover assembly, each of the busbars is connected to each of the tabs in a one-to-one correspondence, the busbars are also connected to the printed circuit board assembly, and the through grooves are arranged on the plastic frame.

As a preferred solution of a soft pack battery module, the through-slots are arranged at intervals on the back of the plastic frame, and a guide block is arranged on the bottom edge between two adjacent through-slots, and two adjacent through-slots are provided with guide blocks. Perforations are formed between the guide blocks.

As a preferred solution of a soft pack battery module, the plastic frame is provided with a mounting hole, the printed circuit board assembly is provided with a collection row, and the busbar is placed in the installation hole and connected to the collection row connect.

As a preferred solution of a soft pack battery module, the collection row is provided with a plurality of collection sheets folded toward the busbars, and each of the collection sheets is connected to each of the busbars in a one-to-one correspondence.

As a preferred solution of a soft pack battery module, the bottom cover assembly is provided with a positioning convex hull, the plastic frame assembly is provided with a positioning groove, and the positioning groove is selectively connected with the positioning convex hull .

As a preferred solution of a soft-packed battery module, foam is arranged between two adjacent soft-packed cells, and the foam is glued to the soft-packed cells.

As a preferred solution of a soft pack battery module, it also includes a water-cooling plate assembly, the water-cooling plate assembly is placed between the battery core assembly and the bottom cover assembly, and a water pipe interface is provided on the bottom cover side of the component.

As a preferred solution of a soft pack battery module, it also includes an upper cover assembly, which is buckled with the bottom cover assembly to form a accommodating cavity, and the battery core assembly and the plastic frame assembly are placed in the accommodating cavity. Into the cavity.

A new energy vehicle includes the soft-pack battery module described in any one of the above solutions.

The beneficial effects of the invention are as follows: the plastic frame assembly extends along the length direction of the soft-pack battery module, a plurality of soft-pack battery cells are stacked in sequence along the length direction of the soft-pack battery module, and the tabs of the soft-pack battery cells are arranged along the length direction of the soft-pack battery module. The width direction of the battery module extends, which is beneficial for the tabs to extend into the through grooves on the plastic frame assembly that extend along the height direction of the soft pack battery module; the arrangement of the through grooves makes the connection between the tabs and the plastic frame assembly more convenient and quicker. The assembly time is reduced, the grouping efficiency of the pouch battery module is increased, and the overall production cost of the pouch battery module is reduced.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained according to the contents of the embodiments of the present invention and these drawings without creative efforts.

1 is an exploded schematic diagram 1 of a soft pack battery module provided by a specific embodiment of the present invention;

2 is a schematic diagram 2 of an explosion of a soft pack battery module provided by a specific embodiment of the present invention;

3 is a schematic diagram of a battery cell assembly, a plastic frame assembly, a printed circuit board assembly, and a water-cooling board assembly provided by a specific embodiment of the present invention;

Fig. 4 is the exploded schematic diagram of Fig. 3;

5 is an exploded schematic diagram of a plastic frame and a busbar provided by a specific embodiment of the present invention;

Fig. 6 is the partial enlarged schematic diagram of A place in Fig. 5;

7 is a front view of a plastic frame and a busbar provided by a specific embodiment of the present invention;

8 is a back view of a plastic frame and a busbar provided by a specific embodiment of the present invention;

Fig. 9 is the partial enlarged schematic diagram of the sectional view along the C-C direction at the B place in Fig. 8;

10 is a partial enlarged schematic view of a perforation provided by a specific embodiment of the present invention;

11 is an exploded schematic diagram of a cell assembly provided by a specific embodiment of the present invention;

12 is a schematic diagram of a bottom cover provided by a specific embodiment of the present invention;

13 is an exploded schematic diagram of a plastic frame assembly provided by a specific embodiment of the present invention;

14 is an exploded schematic diagram of a printed circuit board assembly provided by a specific embodiment of the present invention;

15 is a schematic diagram of a water-cooled plate assembly provided by a specific embodiment of the present invention;

FIG. 16 is an exploded schematic diagram of an upper cover assembly provided by a specific embodiment of the present invention.

In the picture:

1-cell assembly; 11-soft-covered cell; 111-pole ear; 12-foam;

21-bottom cover assembly; 211-bottom cover; 2111-positioning boss; 2112-copper bar mounting hole; 2113-water pipe mounting hole; 2114-plug mounting hole; 212-gasket; 213-buffer;

22-plastic frame assembly; 221-plastic frame; 2211-groove; 2212-positioning groove; 2213-guide block; 2214-perforation; 2215-insulation partition; 2216-partition; 2217-installation hole; Raised; 2219-Hot Riveting Post;

222-busbar; 2221-positioning notch; 2222-flanging; 2223-via hole; 223-output positive copper bar; 224-output negative copper bar; 225-high voltage insulator;

3-printed circuit board assembly; 31-collection row; 311-collection piece; 312-connector; 313-thermistor;

4-Water cooling plate assembly; 41-Water pipe interface; 42-Water cooling plate; 43-Insulating tape; 44-Plastic sheet;

5-upper cover assembly; 51-upper cover; 52-explosion-proof valve; 53-side insulating sheet; 54-top insulating sheet.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 to FIG. 16 , this embodiment provides a soft-pack battery module, the soft-pack battery module includes a cell assembly 1 and a plastic frame assembly printed circuit board assembly 3 , a soft-pack battery module The height direction of the battery module is the H direction, the length direction of the soft-pack battery module is the L direction, and the width direction of the soft-pack battery module is the W direction; wherein, the battery cell assembly 1 includes the battery modules stacked along the length direction of the soft-pack battery module. A plurality of soft-packed cells 11, and the tabs 111 of the plurality of soft-packed cells 11 extend along the width direction of the soft-packed battery module; the plastic frame assembly includes a bottom cover assembly 21 and a bottom cover assembly 21 connected along the soft pack The plastic frame assembly 22 extends in the length direction of the battery module. The plastic frame assembly 22 is provided with a plurality of through grooves 2211 extending along the height direction of the pouch battery module. in each through-groove 2211.

The plastic frame assembly 22 extends along the length direction of the pouch battery module, a plurality of pouch cells 11 are stacked in sequence along the length direction of the pouch battery module, and the tabs 111 of the pouch cells 11 are arranged along the length direction of the pouch battery module. extending in the width direction, which is beneficial for the tabs 111 to extend into the through grooves 2211 on the plastic frame assembly 22 extending in the height direction of the pouch battery module; the setting of the through grooves 2211 makes the connection between the tabs 111 and the plastic frame assembly 22 more convenient It is fast, generally reduces the assembly time, improves the grouping efficiency of the pouch battery module, and further reduces the overall production cost of the pouch battery module.

As shown in FIG. 1 to FIG. 10 , the through grooves 2211 are arranged on the back of the plastic frame 221 at intervals, and the plastic frame structure is provided with a guide block 2213 on the bottom edge between two adjacent through grooves 2211 , and two adjacent guide blocks 2213 A through hole 2214 is formed therebetween, the cross section of the through hole 2214 is set as a trapezoid, and the through hole 2214 communicates with the through groove 2211 on the short side of the trapezoid. It should be noted that the back of the plastic frame 221 is the side of the plastic frame 221 facing the cell assembly 1 , and correspondingly, the front of the plastic frame 221 is the side of the plastic frame 221 facing away from the cell assembly 1 . In order to avoid short circuit between adjacent tabs 111 , one of the guide blocks 2213 on both sides of each through hole 2214 is provided with an insulating spacer 2215 , and further, the insulating spacer 2215 extends into the spacer 2216 .

The process of passing the tab 111 through the slot 2211 is as follows: first, the plastic frame assembly 22 moves downward along the height direction of the soft pack battery module, and one side of the tab 111 first enters the through hole 2214 through the long side of the trapezoidal cross-section through hole 2214, Then, the through-hole 2214 passes through the short side of the trapezoidal cross-section through-hole 2214 and enters the through-slot 2211; then, the plastic frame assembly 22 moves in the direction of the cell assembly 1 along the width direction of the soft-pack battery module. The cross-section of the partition 2216 between 2211 is set as a semicircle, so the slot 2211 between the partitions 2216 of two adjacent semicircular cross-sections is half skirt type, and the tab 111 first enters one end of the slot 2211 It is wider, and finally the tabs 111 can pass through the through-slots 2211 through the semi-skirt-like structure.

By setting the cross section of the through hole 2214 as a trapezoid, the cross section of the through groove 2211 is set as a half skirt type, both to facilitate the penetration of the tab 111; The penetration of the electrode 111 provides a guiding effect, which is conducive to the more accurate penetration of the tab 111, reduces the time for wearing the tab 111, increases the efficiency of wearing the tab 111, and improves the plastic frame assembly and the battery core assembly. Assembly efficiency between 1.

The plastic frame assembly 22 includes a plastic frame 221 extending along the length direction of the pouch battery module and a plurality of bus bars 222 disposed on the front of the plastic frame 221, and each bus bar 222 is connected to each of the tabs 111 in a one-to-one correspondence; The battery pack module also includes a printed circuit board assembly 3, on which a collection row 31 is arranged, a mounting hole 2217 is arranged on the plastic frame 221, and the busbar 222 is placed in the mounting hole 2217 to connect with the collection row 31; the busbar 222 is used for In order to realize the connection between the tab 111 and the printed circuit board assembly 3 .

Specifically, one end of the busbar 222 is provided with a positioning gap 2221, and the other end is provided with a flange 2222; the mounting hole 2217 of the plastic frame 221 is set at one end away from the through hole 2214, and the front side of the plastic frame 221 close to the through hole 2214 is also provided with a The positioning protrusion 2218; the positioning notch 2221 is placed in the positioning protrusion 2218, and the flange 2222 is passed through the positioning hole. At the same time, a via hole 2223 is provided on the confluence piece 222 near the flange 2222. Correspondingly, a hot riveting post 2219 is provided in the position of the plastic frame 221 corresponding to the via hole 2223, and the hot riveting post 2219 is placed in the via hole 2223 to realize the confluence. The sheet 222 is connected to the plastic frame 221 by thermal riveting. Generally, the positioning of the connection between the bus bar 222 and the plastic frame 221 is accurate, convenient and firm.

Further, the bottom cover assembly 21 includes a bottom cover 211 , the connected plastic frame assembly 22 and the battery cell assembly 1 are placed in the bottom cover 211 , and a positioning protrusion 2111 is provided on the bottom cover 211 corresponding to the positioning groove 2212 , Correspondingly, a plurality of positioning grooves 2212 corresponding to the positioning protrusions 2111 are also provided on the front side of the plastic frame 221 near the through holes 2214. The positioning grooves 2212 can be snapped into the positioning protrusions along the height direction of the soft pack battery module. The package 2111, the clearance fit between the positioning groove 2212 and the positioning convex shell 2111 can reduce the machining accuracy and reduce the manufacturing cost. connect.

It should be noted that, as shown in FIG. 12 , the bottom cover 211 is provided with a plurality of positioning bosses 2111 . According to the size of the battery cell assembly 1 , the positioning grooves 2212 on the plastic frame 221 can be selectively positioned with some of them. The convex hulls 2111 are connected to match the tabs 111 connected to the battery cell assembly 1; for example, a certain battery cell assembly 1 is formed by stacking 30 soft-coated cells 11 in sequence, and one side of the soft-coated cells 11 is formed. Take the tab 111 as an example, that is, there are 30 tabs 111 that need to be installed. At this time, if each plastic frame 221 is provided with 10 through grooves 2211, three plastic frames 221 are required to be connected to the bottom cover 211. In order to realize the perforation operation of 30 soft-packed cells 11 . In other embodiments, the plastic frame assemblies 22 of different sizes may include different numbers of plastic frames 221 , and different numbers of through-grooves 2211 may also be provided on different plastic frames 221 , as long as the positioning protrusions 2111 of the bottom cover 211 are selectively located. It is enough to connect the plastic frame 221. The expandability of the plastic frame 221 is realized through the setting of the positioning groove 2212 and the positioning convex hull 2111, so that the plastic frame assembly 22 can be used for connection with different cell assemblies 1, and the plastic frame is submitted. Generality of component 22.

Preferably, the bottom cover assembly 21 is further provided with a sealing pad 212 and a buffer pad 213. The sealing pad 212 is glued to the bottom cover 211 for sealing; the buffer pad 213 is glued to the inside of the bottom cover 211 for buffering and preventing bottom The plastic frame assembly 22 inside the cover 211 collides with the cell assembly 1 .

As shown in FIG. 14 , the collecting row 31 of the printed circuit board assembly 3 is connected to the bus bar 222 passing through the mounting hole 2217 . By modularizing each part of the pouch battery module, the assembly between the modular assemblies is also simpler, the production efficiency of the pouch battery module is improved, the assembly time is reduced, and the manufacturing cost is reduced.

Specifically, the thermistor 313 and a plurality of collection pieces 311 folded toward the bus bar 222 are provided on the collection row 31 , and each collection piece 311 is connected to each bus piece 222 in a one-to-one correspondence. The collection sheet 311 is folded towards the busbar 222, which can make the contact between the collection sheet 311 and the busbar 222 more complete. In addition, the collection sheet 311 folded towards the busbar 222 can also be placed between the collection row 31 and the plastic frame assembly 22. It plays a certain role in positioning during installation and improves assembly efficiency. One end of the collection row 31 is also provided with a plug-in connector 312, and a corresponding position on the bottom cover 211 is provided with a plug-in installation hole 2114. Connection between cover assemblies 21 .

In this embodiment, as shown in FIG. 13 , there are two plastic frame components 22 and two printed circuit board assemblies 3 , which are respectively disposed at both ends of the pouch battery module in the width direction and along the length of the pouch battery module. direction extension. In order to realize the output of the electric energy of the battery cell assembly 1, the plastic frame assembly 22 is also provided with an output positive copper bar 223 connected to the positive electrode of the soft-packaged battery cell 11 and an output negative copper bar 224 connected to the negative electrode of the soft-packaged battery cell 11, which outputs a positive copper bar. The row 223 and the output negative copper row 224 are respectively located at two ends of one of the plastic frame assemblies 22 . The output positive copper row 223 and the output negative copper row 224 are both connected to the plastic frame 221 by thermal riveting at one end, and the other end is connected to the plastic frame 221 through the high voltage insulating member 225 . The copper bar mounting holes 2112 on the bottom cover 211 are bolted.

It is worth noting that the connection between the positive electrode of the soft-packed battery cell 11 and the output positive copper bar 223, the connection between the negative electrode of the soft-packed battery cell 11 and the output negative copper bar 224, the connection between the tab 111 and the bus bar 222, the connection between the bus bar 222 and the collecting The connections of the rows 31 are all electrical connections, so as to realize the collection and transmission of the electric power of the cell assembly 1 .

As shown in FIG. 11 , a foam 12 is arranged between two adjacent soft-packed cells 11 , and adhesives are provided on both sides of the foam 12 , and the foams 12 are glued to the soft-packed cells 11 through the adhesive. The two pouch cells 11 are fixed and glued by means of thermal conductive structural adhesive and structural glue, which can not only meet the thermal conductivity requirements between the pouch cells 11, but also make the connection between the pouch cells 11 firmer; The battery core assembly 1 that has been glued is glued to the inner side of the bottom cover assembly 21 .

As shown in FIG. 15 , the soft pack battery module further includes a water-cooling plate assembly 4 . The water-cooling plate assembly 4 is placed between the battery cell assembly 1 and the bottom cover assembly 21 , and the water pipe interface 41 is disposed on the side of the bottom cover assembly 21 . . Specifically, the water-cooling plate assembly 4 includes a water-cooling plate 42 , an insulating tape 43 and a plastic sheet 44 glued above the water-cooling plate 42 , and the cell assembly 1 is placed on the water-cooling plate 42 . Two water pipe interfaces 41 are provided, one is for cooling water to enter the water cooling plate 42, the other is for cooling water to flow out of the water cooling plate 42, and the two water pipe interfaces 41 are provided with one end of the bottom cover 211 along the length direction of the soft pack battery module, It is beneficial for the cooling water to sufficiently cool the battery cell assembly 1 . The bottom cover 211 is provided with a water pipe installation hole 2113 , and the water pipe interface 41 is threadedly connected in the water pipe installation hole 2113 , which is convenient, firm and well sealed.

As shown in FIG. 16 , the soft pack battery module further includes an upper cover assembly 5, including an upper cover 51, an explosion-proof valve 52 and an insulating sheet. The upper cover 51 and the bottom cover 211 are connected by bolts and snap together to form a accommodating cavity. The core assembly 1, the plastic frame assembly and the printed circuit board assembly 3 are placed in the accommodating cavity; two explosion-proof valves 52 are provided, and two ends of the upper cover 51 along the width direction of the soft pack battery module are respectively provided, which are used for In order to improve the safety of the soft pack battery module, the explosion-proof valve 52 is an existing technology and can be obtained through outsourcing, which is not specifically limited here; the insulating sheet includes a side insulating sheet 53 and a top insulating sheet 54, which are used for upper For the insulation between the cover 51 and the battery core assembly 1, the side insulating sheets 53 are glued to the inner sides of the upper cover 51 along the width direction of the soft pack battery module, and the top insulating sheet 54 is glued to the top surface of the upper cover 51. The inner side; the battery core assembly 1 is glued to the inner side of the upper cover 51 .

This embodiment also discloses a new energy vehicle, including the soft pack battery module described in any of the above solutions.

Of course, it should be noted that the soft pack battery module provided in this application is not limited to be used in automobiles.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Therein, the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Claims (10)

1. a soft pack battery module, is characterized in that, comprises: A battery cell assembly (1), comprising a plurality of soft-packed cells (11) stacked along the length direction of the soft-packed battery module, and the tabs (111) of the plurality of soft-packed cells (11) are along the the width direction of the soft pack battery module extends; A plastic frame assembly, comprising a bottom cover assembly (21) and a plastic frame assembly (22) connected to the bottom cover assembly (21) and extending along the length direction of the soft pack battery module, the plastic frame assembly (22) ) is provided with a plurality of through grooves (2211) extending along the height direction of the pouch battery module, and the tabs (111) of each of the pouch cells (11) are pierced through each of the pouch cells (11) in a one-to-one correspondence. slot (2211). 2. The soft-pack battery module according to claim 1, wherein the plastic frame assembly (22) comprises a plastic frame (221) extending along the length direction of the soft-pack battery module and a plurality of A busbar (222) on the front side of the plastic frame (221), the plastic frame (221) is connected to the bottom cover assembly (21), and each of the busbars (222) corresponds to each of the tabs (111) is connected, the bus bar (222) is also connected with the printed circuit board assembly (3), and the through groove (2211) is arranged on the plastic frame (221). 3 . The soft pack battery module according to claim 2 , wherein the through grooves ( 2211 ) are arranged at intervals on the back of the plastic frame ( 221 ), and two adjacent through grooves ( 2211 ) are arranged at intervals. 4 . A guide block (2213) is arranged on the bottom edge between the two adjacent guide blocks (2213), and a through hole (2214) is formed between two adjacent guide blocks (2213). 4 . The soft pack battery module according to claim 2 , wherein the plastic frame ( 221 ) is provided with a mounting hole ( 2217 ), and the printed circuit board assembly ( 3 ) is provided with a collection row ( 4 . 31), the busbar (222) is placed in the mounting hole (2217) and connected to the collection row (31). 5 . The soft pack battery module according to claim 4 , wherein the collection row ( 31 ) is provided with a plurality of collection sheets ( 311 ) folded toward the busbar ( 222 ), each of which is folded. 6 . The collection pieces (311) are connected to each of the bus pieces (222) in a one-to-one correspondence. 6 . The soft pack battery module according to claim 2 , wherein a positioning convex hull ( 2111 ) is provided on the bottom cover assembly ( 21 ), and a positioning concave is provided on the plastic frame assembly ( 22 ). 7 . a groove (2212), the positioning groove (2212) is selectively connected with the positioning convex hull (2111). 7. The soft-packed battery module according to claim 1, wherein a foam (12) is arranged between two adjacent soft-packed cells (11), and the foam (12) is connected to The soft-packed cells (11) are glued. 8. The soft-pack battery module according to any one of claims 1-7, further comprising a water-cooling plate assembly (4), the water-cooling plate assembly (4) being placed on the battery core assembly Between the component (1) and the bottom cover assembly (21), a water pipe interface (41) is arranged on the side of the bottom cover assembly (21). 9. The soft pack battery module according to any one of claims 1-7, characterized in that it further comprises an upper cover assembly (5), which is buckled with the bottom cover assembly (21) to form an accommodating cavity, The battery core assembly (1) and the plastic frame assembly are placed in the accommodating cavity. 10. A new energy vehicle, characterized by comprising the soft pack battery module according to any one of claims 1-9.

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