CN215266581U

CN215266581U - Battery module

Info

Publication number: CN215266581U
Application number: CN202121769755.XU
Authority: CN
Inventors: 宋海阳
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-21
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a battery module, include: the battery cell group comprises a plurality of battery cells; the busbar is arranged above the battery core group and is connected with the pole of the battery core; the FPC is arranged above the battery cell, a plurality of acquisition pieces are arranged at two ends of the FPC in the width direction, the acquisition pieces are spaced along the length direction of the FPC, and the acquisition pieces are connected with the busbar; support piece, support piece and electric core are connected, and FPC and support piece range upon range of setting are connected and are located support piece's one side far away from electric core, and FPC has the convex first kink of buckling towards the direction of keeping away from support piece, and support piece has the convex second kink of buckling towards FPC, and the second kink is relative with first kink and is located the space that first kink is injectd. The utility model discloses a battery module when electric core inflation, can avoid FPC to be dragged absolutely to guarantee the normal work of FPC communication circuit, further guarantee to the effective collection of electric core voltage and temperature, guarantee the reliability of battery module work.

Description

Battery module

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a battery module is related to.

Background

With the rapid development of electric vehicles, the development of new energy batteries is more and more rapid at present, in order To pursue higher energy density, the modules are made larger, more and more large modules, ctp (cell To pack) modules appear, and meanwhile, the plastic support above the modules is also cancelled, and only aluminum rows connected between the cells and fpc (flexible Printed circuit) for communication acquisition are left. The design scheme behind the present module cancellation support, in order to guarantee FPC's reliability when the vibration, need fix FPC, common means is for using double faced adhesive tape support and electric core upper surface bonding or glue the bubble cotton in FPC below then through the bubble cotton bonding on electric core upper surface.

But carry out the charge-discharge cycle at electric core after, because the length of FPC itself is fixed, can produce the inflation after electric core has gone through the charge-discharge cycle, the change can be released to the size of the thickness direction (module length direction) of electric core, and the FPC that can't change length this moment will be atress dragged, can break FPC when electric core inflation is serious, arouses the damage in communication return circuit, can't guarantee the effective collection to electric core voltage, temperature.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery module, battery module can avoid FPC to be broken when electric core inflation.

According to the utility model discloses battery module, include: the battery core group comprises a plurality of battery cells; the bus bar is arranged above the battery core group and is connected with the pole of the battery core; the FPC is arranged above the electric core group, and is provided with a collecting piece which is connected with the busbar; support piece, support piece with the electric core group is connected, FPC with support piece stacks up the setting and is connected and be located support piece keeps away from one side of electric core, FPC has the orientation and keeps away from support piece's direction is buckled protrudingly first kink, support piece has the orientation FPC buckles protrudingly second kink, the second kink with first kink is relative and is located in the space that first kink prescribed a limit.

According to the utility model discloses battery module, through set up the first kink that the orientation of keeping away from support piece is buckled on FPC and set up the second kink that the orientation FPC is buckled on support piece, the second kink is relative with first kink and is located the space of buckling of first kink, can reserve tensile length in electric core inflation direction for FPC, when electric core produces the inflation, avoid FPC to be dragged absolutely, thereby guarantee the normal work of FPC communication circuit, further guarantee the effective collection to electric core voltage and temperature, guarantee the reliability of battery module work.

According to some embodiments of the present invention, the first bending portion is along a plurality of bending portions spaced apart in the length direction of the FPC, the second bending portion is a plurality of bending portions, and a plurality of the first bending portion and a plurality of the second bending portion one-to-one.

The utility model discloses an in some embodiments, it is a plurality of electric core is in arrange in the thickness direction of electric core, FPC's length direction with the thickness direction of electric core is the same, adjacent two distance between the first kink is L, single the thickness of electric core is d, and satisfies 3d and is less than or equal to L and is less than or equal to 6 d.

In some embodiments of the present invention, the supporting member is a plurality of supporting members spaced apart along the length direction of the FPC, and a plurality of supporting members and a plurality of first bending portions are disposed in a one-to-one correspondence with each other, and each of the supporting members is provided with the second bending portion.

According to some embodiments of the invention, the first kink and the second kink are in a disconnected state.

According to some embodiments of the invention, the first bending part is not higher than the height of the busbar.

According to the utility model discloses a some embodiments, the busbar with the position orientation that the collection piece is connected the electric core bending type becomes the recess, the collection piece is located in the recess.

In some embodiments of the invention, the depth of the recess is 2-6 mm.

According to some embodiments of the utility model, support piece is the bubble cotton, the bubble cotton with FPC with the equal adhesive connection of electric core group.

According to some embodiments of the invention, the FPC is U-shaped.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a plan view of a battery module according to an embodiment of the present invention;

fig. 2 is a perspective view of two FPCs of a battery module according to an embodiment of the present invention;

fig. 3 is a top view of two FPCs of a battery module according to an embodiment of the present invention;

fig. 4 is a sectional view of the FPC and the support member of the battery module according to an embodiment of the present invention;

fig. 5 is an enlarged view at a in fig. 4.

Reference numerals:

100. a battery module;

1. the electric core group; 11. an electric core;

2. a bus bar; 21. a recessed portion;

3. FPC; 31. a first bent portion; 32. collecting the slices; 33. a connector;

4. a support member; 41. a second bending part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The following describes a battery module 100 according to an embodiment of the present invention with reference to the drawings.

As shown in fig. 1, a battery module 100 according to an embodiment of the present invention includes a battery cell pack 1, a bus bar 2, a FPC3, and a support member 4.

Specifically, as shown in fig. 1, the battery pack 1 includes a plurality of battery cells 11, the battery cells 11 are arranged in a thickness direction of the battery cells 11, and a length direction of the battery module 100 is a thickness direction (a left-right direction shown in fig. 1) of the battery cells 11. The busbar 2 is arranged above the battery cell group 1, and the busbar 2 is connected with the pole of the battery cell 11. FPC3 establishes in the top of electric core group 1, and FPC3 extends along the length direction of battery module 100, and busbar 2 establishes in FPC 3's width direction's both sides, and FPC3 width direction's both ends all are equipped with a plurality of collection pieces 32, and a plurality of collection pieces 32 are spaced apart along FPC 3's length direction, and collection piece 32 is connected with busbar 2. The collecting sheet 32 can collect information such as voltage and temperature of the battery cell 11.

Optionally, the collecting sheet 32 is a nickel sheet, and the collecting sheet 32 is welded to the bus bar 2.

As shown in fig. 2-5, the supporting member 4 is disposed above the battery cell assembly 1, and the supporting member 4 is connected to the battery cell 11, and the FPC3 is connected to the supporting member 4 in a stacked manner and located on a side of the supporting member 4 away from the battery cell 11. It can be understood that, support piece 4 and FPC3 range upon range of the setting, and support piece 4 is connected with FPC3, support piece 4 is connected in the top of electric core 11, FPC3 passes through support piece 4 and connects in the top of electric core 11, the fixed reliability of FPC3 has been guaranteed, thereby guarantee the reliability of FPC3 when the vibration, in addition, support piece 4 can be fixed FPC3, can avoid using the support to fix FPC3, the support has been omitted, the weight of battery module 100 has been reduced, the cost is reduced, the density of battery module 100 that has improved.

After battery cell 11 carries out charge-discharge cycle, because the length of FPC3 itself is fixed, can produce the inflation after battery cell 11 has undergone charge-discharge cycle, the size of the thickness direction (module length direction) of battery cell 11 can be put aside the change, in order to avoid FPC3 atress to be broken, FPC3 has the orientation and keeps away from the convex first kink 31 of buckling of support piece 4, support piece 4 has the convex second kink 41 of buckling towards FPC3, second kink 41 is relative with first kink 31 and is located the space that first kink 31 was injectd.

It can be understood, the variation of length when first kink 31 and second kink 41 can compensate electric core 11 inflation, it is specific, when electric core 11 produces the inflation, support piece 4 can be stretched to expanded electric core 11, the height of second kink 41 can descend, FPC3 can follow support piece 4 and stretch, the height of first kink 31 can descend, first kink 31 and second kink 41 have the flat trend of exhibition under the effect of pulling the power, thereby compensate FPC3 because the battery module 100 length that the battery inflation leads to increases the variation, avoid FPC3 to be pulled apart, thereby guarantee the normal work of FPC3 communication loop, further guarantee the effective collection to electric core 11 voltage and temperature, guarantee the reliability of battery module 100 work.

In the example shown in fig. 1, the battery cells 11 are arranged in two rows, there are two FPCs 3, there are two corresponding supporting members 4, the two FPCs 3 both extend along the length direction of the battery module 100, the two FPCs 3 are spaced apart in the width direction (the front-back direction shown in fig. 1) of the battery module 100, and the collecting tab 32 on each FPC3 is connected to the bus bars 2 on both sides thereof.

According to the utility model discloses battery module 100, through set up the first kink 31 that the orientation of keeping away from support piece 4 is buckled and set up the second kink 41 that the orientation FPC3 is buckled on support piece 4 towards setting up on FPC3, second kink 41 just is located the space of buckling of first kink 31 relatively with first kink 31, can reserve tensile length for FPC3 in electric core 11 inflation direction (as the left right direction that fig. 1 shows), when electric core 11 produces the inflation, avoid FPC3 to be pulled apart, thereby guarantee the normal work of FPC3 communication loop, further guarantee the effective collection to electric core 11 voltage and temperature, guarantee the reliability of battery module 100 work.

Further, as shown in fig. 2 to 4, the first bending portions 31 are a plurality of bending portions spaced apart along the length direction of the FPC3, the second bending portions 41 are a plurality of bending portions, and the plurality of first bending portions 31 and the plurality of second bending portions 41 correspond to each other one by one. The better compensation electric core 11's of a plurality of first kink 31 and a plurality of second kink 41 total length's of change, assurance FPC 3's that from this can be better integrality to guarantee the normal work of FPC3 communication loop, further guarantee the effective collection to electric core 11 voltage and temperature, guarantee the reliability of battery module 100 work.

For example, in the example shown in fig. 2 and 3, two spaced first bent portions 31 are provided on each FPC3, two spaced second bent portions 41 are provided on each corresponding support 4, and the two second bent portions 41 are in one-to-one correspondence with the two first bent portions 31.

Alternatively, as shown in fig. 5, the first bent portion 31 and the second bent portion 41 are both arc-shaped bent portions, but the present invention is not limited thereto, and the first bent portion 31 and the second bent portion 41 may also be bent portions with other shapes as long as the first bent portion and the second bent portion can provide a margin for extending the length of the FPC3 toward one side.

Further, a plurality of electric cores 11 are arranged in the thickness direction of electric core 11, and when the distance between two adjacent first kinks 31 is closer, can cause the interference to the position of gathering piece 32, be not convenient for gather the setting of piece 32 and gather being connected between piece 32 and busbar 2, when the distance between two adjacent first kinks 31 is bigger, unable effectual absorption inflation volume, the easy risk that exists by the stretch-break. When the distance between two adjacent first bending portions 31 is L, the thickness of a single battery cell 11 is d, and L is equal to or less than 3d and equal to or less than 6d, the expansion amount of the battery cell 11 can be effectively absorbed, the FPC3 is prevented from being broken by pulling, and meanwhile, the arrangement of the acquisition piece 32 is facilitated.

In some embodiments of the present invention, the supporting member 4 may be a whole extending along the length direction of the FPC3, and the plurality of second bent portions 41 are spaced apart along the length direction of the supporting member 4. Of course, as shown in fig. 4, the supporting member 4 may also be a plurality of supporting members 4 spaced apart along the length direction of the FPC, a plurality of supporting members 4 and a plurality of first bending portions 31 may be oppositely disposed in a one-to-one correspondence manner, and each supporting member 4 is provided with a second bending portion 41. Both ends of each support 4 in the length direction are beyond the first bent portion 31. It can be understood that, in the length direction of FPC3, the projection length of first bent portion 31 on support 4 is smaller than the length of support 4, and both ends of support 4 except for second bent portion 41 have a planar area parallel to the planar area of FPC 3. Therefore, the FPC3 can be better supported, fixed and connected, the reliability of the FPC3 in vibration is guaranteed, and in addition, the supporting pieces 4 can be made of reduced materials, and the cost is reduced.

Of course, the number of the supporting members 4 may be greater than the number of the first bending portions 31, the second bending portions 41 are disposed on part of the supporting members 4, and part of the supporting members 4 are in a planar structure and are bonded to the rest of the plane of the FPC 3.

Preferably, the first bent portion 31 and the second bent portion 41 are in a disconnected state. The planar area of the support 4 is connected with the planar area of the FPC3 to achieve support, fixation and connection of the FPC 3. Because support piece 4 and FPC 3's material is different, support piece 4 and FPC 3's expansion rate is different, first kink 31 and second kink 41 break away from the connection state and first kink 31 and second kink 41 are not connected, FPC3 that can avoid first kink 31 department is because different and fracture with support piece 4's expansion rate, guarantee the integrality of FPC3 communication circuit, thereby guarantee the reliability of FPC3 work, guarantee the effective collection to electric core 11 voltage and temperature, guarantee the reliability of battery module 100 work.

Further, as illustrated in fig. 5, the first bent part 31 and the second bent part 41 are spaced apart, whereby the first bent part 31 and the second bent part 41 can be better separated.

In some embodiments of the present invention, the height of the first bending portion 31 is not higher than the height of the bus bar 2. It can be understood that the highest height of the first bent part 31 is not higher than the height of the bus bar 2, that is, the highest height of the first bent part 31 is lower than the height of the bus bar 2 or flush with the height of the bus bar 2. Therefore, the situation that the height of the first bending part 31 is too high to cause the top cover of the battery module 100 to be higher can be avoided, the size of the battery module 100 is increased, and the first bending part 31 is prevented from being damaged when the top cover is closed.

In some embodiments of the present invention, the position of the bus bar 2 connected to the collecting plate 32 is bent toward the battery cell 11 to form the concave portion 21. From this, when gathering piece 32 and the dish that converges and connect, gather piece 32 and can be located busbar 2's concave part 21 in to avoid gathering piece 32's the highly outstanding upper surface of busbar 2, thereby reduce FPC 3's overall height, the first kink 31 of better assurance highly is not higher than busbar 2's height, is favorable to reducing battery module 100's size, and can avoid battery module 100's top cap lid to close the damage and gather piece 32.

Optionally, the depth of the recess 21 of the busbar 2 is 2-6 mm. For example, the depth of the recessed portion 21 of the busbar 2 may be 2mm, 3mm, 4mm, 5mm, 6mm, or the like. From this can guarantee that the upper surface of gathering piece 32 does not surpass the upper surface of busbar 2 or reduce the height that the upper surface of gathering piece 32 surpassed the upper surface of busbar 2, be favorable to reducing battery module 100's size, and can avoid battery module 100's top cap lid to close the damage to gather piece 32.

Optionally, support piece 4 can be for steeping cotton, bubble cotton and FPC3 and electric core group 1 adhesive connection, both can improve the supporting effect to FPC3 from this, and the cotton shock attenuation that can steep simultaneously guarantees the reliability of FPC3 when the vibration, can also improve the reliability of being connected between FPC3 and electric core 11. For example, a double-sided adhesive tape may be disposed between the supporting member 4 and the FPC3, and a double-sided adhesive tape may be disposed between the supporting member 4 and the electric core assembly 1.

In the example shown in fig. 2 and 3, each FPC3 is in a long strip shape. Of course, the present invention is not limited thereto, and at least one FPC3 may also be U-shaped, thereby improving the variety of the structures of FPCs 3.

As shown in fig. 2 and 3, a connector 33 is provided at one end of the FPC3 in the longitudinal direction, the connector 33 is inserted into the insertion bracket of the battery module 100 as an output terminal of the circuit of the FPC3, and the connector 33 is connected to the pickup sheet 32 through the circuit of the FPC3, so that information picked up by the pickup sheet 32 can be output. Of course, the connector 33 may be disposed at other positions of the FPC3, which is not limited herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module (100), comprising:

the battery pack (1), the battery pack (1) comprises a plurality of battery cells (11);

the bus bar (2) is arranged above the battery core group (1), and the bus bar (2) is connected with a pole of the battery core (11);

the FPC (3) is arranged above the electric core group (1), a collecting piece (32) is arranged on the FPC (3), and the collecting piece (32) is connected with the bus bar (2);

support piece (4), support piece (4) with electric core group (1) is connected, FPC (3) with support piece (4) range upon range of the setting and be located keep away from of support piece (4) one side of electric core (11), FPC (3) have towards keep away from the convex first kink (31) of direction bending of support piece (4), support piece (4) have towards FPC (3) buckle convex second kink (41), second kink (41) with first kink (31) are relative and are located in the space that first kink (31) are injectd.

2. The battery module (100) according to claim 1, wherein the first bent portion (31) is a plurality of pieces spaced apart in a longitudinal direction of the FPC (3), the second bent portion (41) is a plurality of pieces, and the plurality of first bent portions (31) and the plurality of second bent portions (41) correspond one to one.

3. The battery module (100) according to claim 2, wherein the plurality of battery cells (11) are arranged in a thickness direction of the battery cells (11), a length direction of the FPC (3) is the same as the thickness direction of the battery cells (11), a distance between two adjacent first bending portions (31) is L, a thickness of a single battery cell (11) is d, and L is greater than or equal to 3d and less than or equal to 6 d.

4. The battery module (100) according to claim 2, wherein the support member (4) is a plurality of support members spaced apart in a longitudinal direction of the FPC (3), a plurality of support members (4) are disposed opposite to the plurality of first bent portions (31) in a one-to-one correspondence, and the second bent portion (41) is disposed on each of the support members (4).

5. The battery module (100) according to claim 1, wherein the first bent portion (31) and the second bent portion (41) are in a disconnected state.

6. The battery module (100) according to claim 1, wherein the first bent portion (31) has a height not higher than that of the bus bar (2).

7. The battery module (100) according to claim 6, wherein the bus bar (2) is bent toward the battery cell (11) at a position where the bus bar is connected to the collecting piece (32) to form a concave portion (21), and the collecting piece (32) is located in the concave portion (21).

8. The battery module (100) according to claim 7, wherein the depth of the concave portion (21) is 2-6 mm.

9. The battery module (100) according to claim 1, wherein the support member (4) is foam, and the foam is adhesively connected to both the FPC (3) and the electric core pack (1).

10. The battery module (100) according to claim 1, wherein the FPC (3) is U-shaped.