CN215869699U - Soft-packaged electrical core module and battery device - Google Patents

Abstract

The utility model provides a soft-package battery cell module and a battery device. The soft-packaged battery cell module comprises: the battery core assembly comprises a first battery core and a second battery core which are connected in series, the first battery core comprises a first winding core, a first positive lug and a first negative lug which are connected with the first winding core, the second battery core comprises a second winding core, a second positive lug and a second negative lug which are connected with the second winding core, a first mounting through hole is formed in the first positive lug, and a second mounting through hole corresponding to the first mounting through hole is formed in the second negative lug; and the locking structure comprises a locking piece which can penetrate through the first mounting through hole and the second mounting through hole, and the locking piece is locked on the first positive lug and the second negative lug so that the first positive lug and the second negative lug can be detachably connected. The technical scheme of the utility model solves the problem that the battery core is easily scrapped when the battery core of the soft-package battery core module in the prior art is replaced.

Description

Soft-packaged electrical core module and battery device

Technical Field

The utility model relates to the technical field of power batteries, in particular to a soft package battery cell module and a battery device.

Background

Soft-packaged electrical core module generally is established ties by a plurality of electric cores and is formed, and the operating voltage of an electric core is about 2.4V to 4.5V, and a plurality of electric cores can constitute the soft-packaged electrical core module of operating voltage more than 24V after establishing ties.

In the prior art, a plurality of battery cells are generally connected in series by arranging a connecting sheet between two tabs and welding the two tabs and the connecting sheet together by ultrasonic waves or laser. One of the two tabs is welded with one side of the connecting sheet, and the other tab of the two battery cells is welded with the other side of the connecting sheet, so that the two tabs can be connected. However, when the battery needs to be repaired and the battery core needs to be replaced, the tabs of the multiple welded battery cores cannot be normally separated, so that the problem that the battery cores are scrapped, namely the tabs cannot be normally welded again, can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a soft-packaged battery cell module and a battery device, and aims to solve the problem that a battery cell is easily scrapped when the battery cell of the soft-packaged battery cell module in the prior art is replaced.

In order to achieve the above object, according to an aspect of the present invention, there is provided a soft-package cell module, including: the battery core assembly comprises a first battery core and a second battery core which are connected in series, the first battery core comprises a first winding core, a first positive lug and a first negative lug which are connected with the first winding core, the second battery core comprises a second winding core, a second positive lug and a second negative lug which are connected with the second winding core, a first mounting through hole is formed in the first positive lug, and a second mounting through hole corresponding to the first mounting through hole is formed in the second negative lug; and the locking structure comprises a locking piece which can penetrate through the first mounting through hole and the second mounting through hole, and the locking piece is locked on the first positive lug and the second negative lug so that the first positive lug and the second negative lug can be detachably connected.

Further, locking structure still includes the anticreep piece of being connected with the retaining member, and the anticreep piece includes the body and sets up in the mounting hole of body, is equipped with the internal thread on the internal face of mounting hole, and the outer wall of at least part retaining member is equipped with the external screw thread, external screw thread and internal thread threaded connection to connect first anodal ear and second negative pole ear.

Further, the retaining member comprises a locking main body and an end cap connected with the locking main body, the diameter of the locking main body is smaller than that of the end cap, a first step face is arranged between the locking main body and the end cap, the first step face abuts against the first positive lug, and the locking main body is connected with the mounting hole after penetrating through the first mounting through hole and the second mounting through hole.

Further, soft-packaged battery cell module is still including being located the connecting portion between first anodal ear and the second negative pole ear, and connecting portion are used for connecting first anodal ear and second negative pole ear electricity, are equipped with on the connecting portion to correspond with first installation through-hole and are used for supplying the third installation through-hole that the retaining member worn out.

Further, at least one side of the connecting part is provided with a plurality of protrusions which are arranged at intervals, and a groove is formed between every two adjacent protrusions.

Furthermore, the connecting part comprises a connecting body and a convex part connected with the connecting body, the convex part protrudes out of the side surface of the first positive tab and/or the second negative tab, and a connecting hole used for being connected with the voltage acquisition equipment is formed in the convex part.

Further, first positive tab is the Z type, and first positive tab is including the first utmost point ear section, second utmost point ear section and the third utmost point ear section that link gradually, and first utmost point ear section is connected with first book core, has first contained angle between first utmost point ear section and the second utmost point ear section, has the second contained angle between second utmost point ear section and the third utmost point ear section, and first utmost point ear section and third utmost point ear section are located the relative both sides of second utmost point ear section, and first installation through-hole sets up in the third utmost point ear section.

Further, the second negative electrode tab is a flat plate section or an L-shaped plate section; or the structure of the second positive tab is the same as that of the first positive tab; or, be equipped with on the first positive tab along a plurality of first mounting through-holes of first direction interval arrangement, be equipped with on the second negative pole ear with a plurality of second mounting through-holes that a plurality of first mounting through-holes correspond, soft-packaged electrical core module still includes a plurality of locking structures that correspond the setting with a plurality of first mounting through-holes.

Further, the battery core assembly comprises a plurality of first battery cells and a plurality of second battery cells which are arranged along a second direction perpendicular to the first direction, the first battery cells and the second battery cells are alternately arranged, and when the total number of the first battery cells and the second battery cells is odd, the first negative electrode tab of one first battery cell which is positioned at the outermost side in the battery core assembly and the first positive electrode tab of the other first battery cell which is positioned at the outermost side in the battery core assembly are both connected with the equipment to be connected; or when the total number of the first battery cells and the total number of the second battery cells are even numbers, the first negative electrode tab of one first battery cell located on the outermost side in the battery cell assembly and the second positive electrode tab of the other second battery cell located on the outermost side in the battery cell assembly are both connected with the equipment to be connected.

According to another aspect of the utility model, the utility model provides a battery device, which comprises a casing and the soft package cell module located in the casing.

By applying the technical scheme of the utility model, the locking piece capable of detachably connecting the first positive electrode lug and the second negative electrode lug is arranged, so that when a problematic battery cell needs to be replaced due to the problems of service life attenuation or swelling of the first battery cell or the second battery cell, the corresponding battery cell can be replaced only by detaching the locking piece from the first positive electrode lug and the second negative electrode lug, and the battery cell without the problem in the first battery cell and the second battery cell is difficult to damage in the replacement process, thereby solving the problem that the battery cell is easy to scrap when the battery cell is replaced by the soft package battery cell module.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic structural diagram of a soft-package cell module according to an embodiment of the present invention;

fig. 2 shows a left side view of the soft-packed cell module of fig. 1;

fig. 3 shows a partially enlarged view of the soft-packed cell module of fig. 2;

fig. 4 shows a schematic diagram of a top view of the soft-package cell module of fig. 1 after being rotated by 90 degrees;

fig. 5 shows a partial enlarged view of the soft-packed cell module of fig. 4; and

fig. 6 shows a schematic structural diagram of a connecting portion of the soft-package cell module of fig. 1.

Wherein the figures include the following reference numerals:

100. an electrical core assembly; 10. a first cell; 11. a first winding core; 12. a first positive tab; 121. a first tab section; 122. a second tab segment; 123. a third tab segment; 13. a first negative electrode tab; 20. a second cell; 21. a second winding core; 22. a second positive tab; 23. a second negative tab; 30. a locking structure; 31. a locking member; 311. a locking body; 312. an end cap; 32. a drop-off prevention member; 40. a connecting portion; 41. a connecting body; 42. a convex portion; 43. a third mounting through hole; 44. connecting holes; 45. and (4) protruding.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In the embodiment of the present invention, a connection manner of connecting the tabs of the two battery cells together by welding is limited by the welding fixture and the welding platform. When a plurality of electric cores are required to be connected in series, two or more groups of electric cores can only be welded respectively, and then the welded electric cores are welded together, so that different positioning fixtures and different welding spaces are required for different quantities of the electric cores to be connected in series, manpower and time are consumed, the production efficiency of the soft-package electric core module can be reduced, and mass production cannot be performed. And if the battery needs to be repaired or the battery cell needs to be replaced by adopting the connection mode, the operation difficulty is increased, and the rejection rate of the battery cell is increased.

Therefore, the embodiment of the utility model provides a soft-package battery cell module which can get rid of the operation of a welding machine and is not limited by the number of battery cells.

In the embodiment of the present invention, the first direction is an extending direction of the length of first positive tab 12 or the length of second negative tab 23, and the second direction is a direction perpendicular to the surface of first positive tab 12 or second negative tab 23.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a soft-package cell module. The soft package electric core module includes an electric core module 100 and a locking structure 30. The battery core assembly 100 comprises a first battery core 10 and a second battery core 20 which are connected in series, wherein the first battery core 10 comprises a first winding core 11, a first positive tab 12 and a first negative tab 13 which are both connected with the first winding core 11, the second battery core 20 comprises a second winding core 21, and a second positive tab 22 and a second negative tab 23 which are both connected with the second winding core 21, a first installation through hole is formed in the first positive tab 12, and a second installation through hole corresponding to the first installation through hole is formed in the second negative tab 23; the locking structure 30 comprises a locking member 31 which can pass through the first mounting through hole and the second mounting through hole, and the locking member 31 is locked on the first positive tab 12 and the second negative tab 23 so that the first positive tab 12 and the second negative tab 23 can be detachably connected.

Among the above-mentioned technical scheme, can make first anodal ear 12 and the locking piece 31 of connection can be dismantled to second negative pole ear 23 through the setting, like this, when appearing life-span decay or swell scheduling problem and need changing the electric core that has a problem because of first electric core 10 or second electric core 20, only need demolish locking piece 31 from first anodal ear 12 and second negative pole ear 23, just can change corresponding electric core, and the electric core that does not have the problem in first electric core 10 and the second electric core 20 is at the in-process of changing, its utmost point ear is difficult to receive the damage, thereby it appears the condemned problem of electric core easily to have solved soft-packaged electric core module when changing electric core.

Further, through setting up locking structure 30, avoided the electric core quantity in the soft packet of electric core module of welded connected mode restriction, also avoided the maintenance to change electric core the time can appear unnecessary extravagant.

Specifically, the locking member 31 may be riveted into the first and second mounting through-holes by riveting or the like, so that the first positive electrode tab 12 and the second negative electrode tab 23 may be connected by the locking member 31. Like this, only need destroy retaining member 31 and can unpack first anodal ear 12 apart with second negative pole ear 23 when demolising to avoid its utmost point ear to receive the damage, and then solved soft-packaged battery cell module and appeared electric core condemned problem when changing electric core easily.

As shown in fig. 3, in the embodiment of the present invention, the locking structure 30 further includes an anti-separation member 32 connected to the locking member 31, the anti-separation member 32 includes a body and a mounting hole disposed in the body, an inner thread is disposed on an inner wall surface of the mounting hole, an outer thread is disposed on an outer wall surface of a portion of the locking member 31, and the outer thread is in threaded connection with the inner thread to connect the first positive tab 12 and the second negative tab 23.

Among the above-mentioned technical scheme, part retaining member 31 passes first assembly through-hole in proper order, be connected with the mounting hole behind the second assembly through-hole, can avoid retaining member 31 to drop from first anodal ear 12 and second negative pole ear 23 like this, and can lock first anodal ear 12 and second negative pole ear 23 between part retaining member 31 and anticreep piece 32, furthermore, through screw-thread fit between retaining member 31 and the anticreep piece 32, like this when the technical staff is changing the electric core that has the problem, only need twist soon anticreep piece 32, it can to make anticreep piece 32 and retaining member 31 remove the cooperation, above-mentioned dismantlement mode is simple, thereby can avoid damaging the utmost point ear of electric core.

Preferably, in the embodiment of the present invention, the locking member 31 is a bolt, and the anti-slip member 32 is a nut, so that the first positive tab 12 and the second negative tab 23 can be detachably connected. Of course, in an alternative embodiment not shown in the drawings, the locking structure 30 may be a rivet, so that the first positive tab 12 and the second negative tab 23 can be detachably connected by riveting.

As shown in fig. 3, in the embodiment of the present invention, locking member 31 includes locking body 311 and end cap 312 connected to locking body 311, the diameter of locking body 311 is smaller than the diameter of end cap 312, and there is a first step surface between locking body 311 and end cap 312, the first step surface abuts against first positive electrode tab 12, and locking body 311 passes through the first mounting through hole and the second mounting through hole and then is connected to the mounting hole.

In the above technical solution, the side of the end cap 312 facing the first positive tab 12 (i.e. the first step surface) abuts against the first positive tab 12, and the side of the anti-separation member 32 facing the second negative tab 23 abuts against the second negative tab 23, so that the first positive tab 12 and the second negative tab 23 can be locked between the end cap 312 and the anti-separation member 32.

As shown in fig. 3 and 4, in the embodiment of the utility model, the soft package cell module further includes a connection portion 40 located between the first positive tab 12 and the second negative tab 23, the connection portion 40 is used to electrically connect the first positive tab 12 and the second negative tab 23, and a third installation through hole 43 corresponding to the first installation through hole and used for the fastening member 31 to pass through is formed in the connection portion 40.

Through the arrangement, the force of pressing the end cap 312 and the anti-dropping piece 32 on the first positive tab 12 and the second negative tab 23 can be more uniform, so that the first positive tab 12 and the second negative tab 23 are more firmly connected.

Specifically, in the embodiment of the present invention, the connection portion 40 is a conductive plate having a certain thickness, so that the overcurrent capacity of the soft package battery cell module can be increased.

Preferably, in the embodiment of the present invention, the third mounting through hole 43 may also be provided with an internal thread, so that the locking body 311 is first screwed with the third mounting through hole 43 and then screwed with the anti-slip member 32 through the third mounting through hole 43, which may increase the coupling strength.

As shown in fig. 5 and 6, in the embodiment of the present invention, at least one side of the connection portion 40 is provided with a plurality of protrusions 45 arranged at intervals. Thus, a groove is formed between two adjacent protrusions 45.

Through the setting, can increase the frictional force between first anodal ear 12 and the connecting portion 40 or between second negative pole ear 23 and the connecting portion 40 to can make first anodal ear 12 and the second negative pole ear 23 be connected more firm, like this when soft-packaged battery cell module receives vibrations at the in-process of transport, can avoid as far as possible taking place relative displacement's risk between first anodal ear 12 and the second negative pole ear 23.

Further, by adopting the detachable connection mode, the connection part 40 can be repeatedly used for connecting the first positive tab 12 and the second negative tab 23, so that the loss of materials is reduced.

Preferably, in the embodiment of the present invention, both sides of the connecting portion 40 are provided with a plurality of protrusions 45 arranged at intervals.

Preferably, in the embodiment of the present invention, the cross-sectional shape of the protrusion 45 may be rectangular or triangular, etc.

Specifically, in the embodiment of the present invention, the hardness of each of the first positive tab 12 and the second negative tab 23 is less than the hardness of the connection portion 40, and before the locking structure 30 connects the first positive tab 12 and the second negative tab 23, the first positive tab 12 and the second negative tab 23 are pressed on the opposite sides of the connection portion 40, so that the protrusions 45 are slightly pressed into the first positive tab 12 and the second negative tab 23, thereby increasing the contact area between the first positive tab 12 and the connection portion 40 and the contact area between the second negative tab 23 and the connection portion 40, further increasing the flow area between the first positive tab 12 and the second negative tab 23, and also ensuring the connection reliability between the first positive tab 12 and the second negative tab 23. Further, the connection portion 40 can also perform a preliminary positioning of the first positive tab 12 and the second negative tab 23, and then connect them with the locking structure 30.

As shown in fig. 1, in the embodiment of the present invention, the connection portion 40 includes a connection body 41 and a protrusion 42 connected to the connection body 41, the protrusion 42 protrudes from a side surface of the first positive tab 12 and/or the second negative tab 23, and a connection hole 44 for connecting to a voltage collecting device is formed on the protrusion 42.

Among the above-mentioned technical scheme, connecting hole 44 can connect the one end of voltage acquisition line to the other end of voltage acquisition line can be connected with voltage acquisition equipment, and like this, when the in-process that soft-packaged electrical core module was charging the overcharge's condition appears, voltage acquisition equipment can produce the warning, with suggestion technical staff, thereby can guarantee the security of charging of soft-packaged electrical core module.

Preferably, in an embodiment of the present invention, the voltage collecting device may be a BMS (building management system).

As shown in fig. 3, in the embodiment of the present invention, the first positive tab 12 is Z-shaped, the first positive tab 12 includes a first tab segment 121, a second tab segment 122, and a third tab segment 123 connected in sequence, the first tab segment 121 is connected to the first winding core 11, a first included angle is formed between the first tab segment 121 and the second tab segment 122, a second included angle is formed between the second tab segment 122 and the third tab segment 123, the first tab segment 121 and the third tab segment 123 are located on two opposite sides of the second tab segment 122, and the first mounting through hole is disposed on the third tab segment 123.

With the above arrangement, the first positive tab 12 can extend in the direction of the second negative tab 23, and the third tab segment 123 is parallel to the second negative tab 23, so that the contact between the second negative tabs 23 of the first positive tab 12 can be a surface-to-surface contact, thereby increasing the flow area between the first positive tab 12 and the second negative tab 23.

As shown in fig. 3, in the embodiment of the present invention, the second negative electrode tab 23 is a flat plate segment.

With the above arrangement, the second negative electrode tab 23 and the third negative electrode tab segment 123 can be parallel, so that the second negative electrode tab 23 can be in surface-to-surface contact with one side surface of the connection portion 40, and the third negative electrode tab segment 123 can be in surface-to-surface contact with the other side surface of the connection portion 40, thereby increasing the flow area between the first positive electrode tab 12 and the second negative electrode tab 23.

Preferably, in the embodiment of the present invention, the first positive tab 12 may be an L-shaped plate segment, and the corresponding second negative tab 23 is also configured as an L-shaped plate segment, so that it is also ensured that a portion of the first positive tab 12 and one side surface of the connection portion 40 can be in surface-to-surface contact, and a portion of the second negative tab 23 and the other side surface of the connection portion 40 are in surface-to-surface contact.

Preferably, in the embodiment of the present invention, the structure of second positive tab 22 is the same as the structure of first positive tab 12.

Preferably, in the embodiment of the present invention, the structure of first negative electrode tab 13 is the same as that of second negative electrode tab 23.

As shown in fig. 1 and 4, in the embodiment of the present invention, a plurality of first installation through holes are sequentially formed in the first positive tab 12 along the first direction, a plurality of second installation through holes corresponding to the plurality of first installation through holes are formed in the second negative tab 23, and the soft-package battery cell module further includes a plurality of locking structures 30 corresponding to the plurality of first installation through holes.

With the above arrangement, the reliability of connection between first positive tab 12 and second negative tab 23 can be improved, and the flow area between first positive tab 12 and second negative tab 23 can be made large.

As shown in fig. 2 and 4, in the embodiment of the present invention, the battery core assembly 100 includes a plurality of first battery cells 10 and a plurality of second battery cells 20 arranged in a second direction perpendicular to the first direction, and the first battery cells 10 and the second battery cells 20 are alternately arranged. When the total number of the first battery cells 10 and the second battery cells 20 is odd, that is, when all the battery cells located at the outermost side are the first battery cells 10, the first negative electrode tab 13 of one first battery cell 10 located at the outermost side in the battery cell assembly 100 and the first positive electrode tab 12 of another first battery cell 10 located at the outermost side in the battery cell assembly 100 are both connected to the device to be connected; or, when the total number of the first battery cells 10 and the total number of the second battery cells 20 are even numbers, that is, when the battery cells located at the outermost sides are the first battery cell 10 and the second battery cell 20, the first negative electrode tab 13 of one first battery cell 10 located at the outermost side in the battery cell assembly 100 and the second positive electrode tab 22 of another second battery cell 20 located at the outermost side in the battery cell assembly 100 are both connected to the device to be connected.

Among the above-mentioned technical scheme, through setting up a plurality of first electric cores 10 and a plurality of second electric core 20, like this, can increase the voltage of soft-packaged electrical core module to make soft-packaged electrical core module adapt to the power consumption device of big rated voltage.

Specifically, in the embodiment of the present invention, a plurality of first battery cells 10 and a plurality of second battery cells 20 are connected in series, that is, the second battery cell 20 is disposed between two adjacent first battery cells 10, the second negative tab 23 of the second battery cell 20 is connected to the first positive tab 12 of one of the two adjacent first battery cells 10, and the second positive tab 22 of the second battery cell 20 is connected to the first negative tab 13 of another one of the two adjacent first battery cells 10.

Specifically, in the embodiment of the present invention, when the total number of the plurality of first battery cells 10 and the plurality of second battery cells 20 is an odd number, two outermost battery cells in the battery cell assembly 100 are two first battery cells 10; when the total number of the plurality of first cells 10 and the plurality of second cells 20 is an even number, two outermost cells in the cell core assembly 100 are the first cell 10 and the second cell 20.

Preferably, in the embodiment of the present invention, the device to be connected may be a power supply device or an electrical device, so that the soft package battery cell is charged and discharged.

Specifically, in the embodiment of the present invention, connection portion 40 is also provided between first negative electrode tab 13 and second positive electrode tab 22 corresponding thereto.

In the embodiment of the present invention, the positive and negative electrode tabs of the battery core need to be set according to design requirements, and are cut and press-formed in advance.

It should be noted that, in the embodiment of the present invention, the disassembled connecting portion 40 and the locking structure 30 can be reused, so as to avoid waste.

It should be noted that, in the embodiment of the present invention, if the soft-package battery cell module is scrapped due to mechanical damage, the soft-package battery cell module may be disassembled, and the disassembled soft-package battery cell module may be reused after evaluation.

An embodiment of the present invention provides a battery device. The battery device comprises a shell and the soft-package battery cell module positioned in the shell. Above-mentioned battery device has the whole advantages of above-mentioned laminate polymer core module, and this here is no longer repeated.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: can make first anodal ear and second negative pole ear can dismantle the retaining member of connection through the setting, thus, when the electric core that has the problem needs to be changed because of first electric core or second electric core appear life-span decay or swell scheduling problem, only need demolish the retaining member from first anodal ear and second negative pole ear, just can change corresponding electric core, and the electric core that does not have the problem in first electric core and the second electric core can not receive the damage at the in-process of changing, thereby the flexible-packaged electric core module has been solved and has appeared the condemned problem of electric core easily when changing electric core.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a soft-packaged electrical core module which characterized in that includes:

the battery core assembly (100) comprises a first battery core (10) and a second battery core (20) which are connected in series, wherein the first battery core (10) comprises a first winding core (11), a first positive tab (12) and a first negative tab (13) which are connected with the first winding core (11), the second battery core (20) comprises a second winding core (21), and a second positive tab (22) and a second negative tab (23) which are connected with the second winding core (21), a first mounting through hole is formed in the first positive tab (12), and a second mounting through hole corresponding to the first mounting through hole is formed in the second negative tab (23);

the locking structure (30) comprises a locking piece (31) capable of penetrating through the first installation through hole and the second installation through hole, and the locking piece (31) is locked on the first positive lug (12) and the second negative lug (23) so that the first positive lug (12) and the second negative lug (23) can be detachably connected.

2. The soft package battery core module of claim 1, characterized in that, locking structure (30) still include with anticreep piece (32) that retaining member (31) are connected, anticreep piece (32) include the body with set up in the mounting hole of body, be equipped with the internal thread on the internal wall face of mounting hole, at least part the outer wall face of retaining member (31) is equipped with the external screw thread, the external screw thread with interior thread threaded connection to connect first anodal ear (12) with second anodal ear (23).

3. The soft package battery cell module of claim 2, wherein the locking member (31) comprises a locking main body (311) and an end cap (312) connected with the locking main body (311), the diameter of the locking main body (311) is smaller than that of the end cap (312), a first step surface is arranged between the locking main body (311) and the end cap (312), the first step surface abuts against the first positive tab (12), and the locking main body (311) is connected with the mounting hole after passing through the first mounting through hole and the second mounting through hole.

4. The module of any one of claims 1 to 3, further comprising a connecting portion (40) located between the first positive tab (12) and the second negative tab (23), wherein the connecting portion (40) is used for electrically connecting the first positive tab (12) and the second negative tab (23), and a third mounting through hole (43) corresponding to the first mounting through hole and used for the fastening member (31) to pass through is formed in the connecting portion (40).

5. The soft-package battery cell module according to claim 4, characterized in that at least one side of the connecting part (40) is provided with a plurality of protrusions (45) arranged at intervals, and a groove is formed between two adjacent protrusions (45).

6. The soft package battery cell module according to claim 4, wherein the connecting portion (40) comprises a connecting body (41) and a protruding portion (42) connected to the connecting body (41), the protruding portion (42) protrudes from a side surface of the first positive tab (12) and/or the second negative tab (23), and a connecting hole (44) for connecting with a voltage collecting device is formed in the protruding portion (42).

7. The soft package battery cell module according to any one of claims 1 to 3, wherein the first positive tab (12) is Z-shaped, the first positive tab (12) comprises a first tab section (121), a second tab section (122) and a third tab section (123) which are sequentially connected, the first tab section (121) is connected with the first winding core (11), a first included angle is formed between the first tab section (121) and the second tab section (122), a second included angle is formed between the second tab section (122) and the third tab section (123), the first tab section (121) and the third tab section (123) are located on two opposite sides of the second tab section (122), and the first mounting through hole is arranged on the third tab section (123).

8. The soft-package cell module according to any one of claims 1 to 3, wherein the second negative electrode tab (23) is a flat plate section or an L-shaped plate section; or the structure of the second positive tab (22) is the same as that of the first positive tab (12); or, be equipped with on first positive ear (12) along a plurality of first direction interval arrangement first mounting hole, be equipped with on second negative pole ear (23) with a plurality of that first mounting hole corresponds second mounting hole, soft-package battery core module still includes with a plurality of first mounting hole corresponds a plurality of locking structure (30).

9. The flexible-package cell module according to any one of claims 1 to 3, characterized in that the cell assembly (100) comprises a plurality of the first cells (10) and a plurality of the second cells (20) arranged in a second direction perpendicular to the first direction, the first cells (10) and the second cells (20) being arranged alternately,

when the total number of the first battery cells (10) and the second battery cells (20) is odd, the first negative tab (13) of one outermost first battery cell (10) in the battery cell assembly (100) and the first positive tab (12) of the other outermost first battery cell (10) in the battery cell assembly (100) are connected with a device to be connected; or when the total number of the first battery cells (10) and the total number of the second battery cells (20) are even numbers, the first negative electrode tab (13) of one of the first battery cells (10) positioned at the outermost side in the battery assembly (100) and the second positive electrode tab (22) of the other one of the second battery cells (20) positioned at the outermost side in the battery assembly (100) are connected with a device to be connected.

10. A battery device, comprising a housing and the pouch cell module of any of claims 1-9 located in the housing.

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