CN114094271A - Battery module - Google Patents
Battery module Download PDFInfo
- Publication number
- CN114094271A CN114094271A CN202010745230.6A CN202010745230A CN114094271A CN 114094271 A CN114094271 A CN 114094271A CN 202010745230 A CN202010745230 A CN 202010745230A CN 114094271 A CN114094271 A CN 114094271A
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- CN
- China
- Prior art keywords
- circuit board
- flexible circuit
- battery module
- sampling
- cantilever beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/631—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only
- H01R13/6315—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only allowing relative movement between coupling parts, e.g. floating connection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to a battery module, including: a plurality of battery cell units are sequentially stacked along the left and right directions, and sampling connection points are arranged at the tops of the battery cell units; the sampling connection wire harness comprises a flexible circuit board, the flexible circuit board is fixedly adhered to the top surface of the cell unit, a plurality of cantilever beams are arranged on the flexible circuit board, and the conductive connection parts on the cantilever beams are in conductive connection with the sampling connection points on the corresponding cell units one by one through conductive connection parts, so that the cantilever beams and the corresponding cell units form signal sampling groups; each cantilever beam is fixedly arranged on the top surface of the corresponding electric core unit which belongs to the same signal sampling group with the corresponding cantilever beam. The cantilever beam is relatively fixed with the sampling tie point that corresponds electric core unit, even if electric core unit produces horizontal displacement because of the thermal energy, the cantilever beam is relatively fixed with the sampling tie point of corresponding electric core unit, and the electrically conductive connecting piece that corresponds also relatively stipulates, and electrically conductive connecting piece can not bear and tear the effort, avoids appearing the problem that electrically conductive connecting piece tears the breakage.
Description
Technical Field
The present invention relates to a battery module.
Background
With the widespread application of electric vehicles, the safety of automobiles is also receiving more attention, and in particular, higher reliability requirements are put on the safety of battery voltage of the electric vehicles.
At present, a special battery sampling detection circuit is configured corresponding to a battery module, and most of the circuit is in conductive connection with electrodes of corresponding core units in the battery module by using a sampling connection wire harness, so that battery voltage collection is realized, and good monitoring is guaranteed. Inside left right direction of following usually of battery mould arranges a plurality of electric core units in proper order, every electric core unit includes single electric core unit or the electric core unit of establishing ties more than two, the electrode of sampling connecting harness and the corresponding electric core unit of each electric core unit is electrically conductive to be connected, it is concrete, the flexible circuit board is usually adopted to the sampling connecting harness, FPC promptly, the flexible circuit board is sticky to be fixed on electric core unit surface, the electrode passes through the aluminium silk as electric core unit sampling point and is connected with the nickel piece on the flexible circuit board, wherein, ultrasonic welding is passed through on the nickel piece of ultrasonic welding fixing on the flexible circuit board to the one end of aluminium silk, the other end then welds on the electric core unit sampling point of battery module, realize normal voltage sampling.
In the use, because the vehicle often charges and discharges, horizontal displacement can appear because the inside electric core unit of battery module because the inflation that generates heat, leads to flexible circuit board and electric core unit surface to tear degummed. At this moment, if the vehicle produced vibrations at the in-process of traveling, will arouse thereby the flexible circuit board along with vibrations simultaneously, thereby shake disconnected aluminium silk and appear the problem that the aluminium silk drops, the sampling connecting harness takes place to damage, leads to battery management system can not gather the monomer voltage in the battery module, and is more dangerous because the aluminium silk drops, appears the lapped condition with other high-pressure parts of battery module easily to produce the short circuit risk, cause dangerous accident.
The invention discloses a signal acquisition wiring harness of a power battery in Chinese patent application with application publication number CN111295047A, which comprises a flexible circuit board, wherein an L-shaped through groove is arranged on the side edge of the flexible circuit board to form a cantilever beam area, a connecting sheet is arranged on the cantilever beam area, and the flexible circuit board is electrically connected with a single battery through the connecting sheet to acquire signals. Set up the cantilever beam district on this kind of flexible circuit board, form by the logical groove of the L shape of seting up on the flexible circuit board, it can give the leeway of a buffering of signal acquisition pencil to should the battery module appear the cracked risk of connection piece when dragging the battery signal acquisition pencil after long-term the use or under bad operating mode. Although a certain amount of buffer room can be provided by the cantilever beam structure, the cantilever beam area is usually in a free state because the flexible circuit board is usually fixed by locally gluing in the middle, and when the flexible circuit board is degummed from the surface of the battery cell unit, the flexible circuit board can drive the cantilever beam area to vibrate together, a large tearing effect can still be generated for the connecting sheet to cause the connecting sheet to fall off, and a large potential safety hazard exists.
Disclosure of Invention
The invention aims to provide a battery module to solve the technical problem that a flexible circuit board in a battery signal acquisition line can still apply tearing acting force to a connecting sheet through a cantilever beam area during degumming in the prior art.
In order to achieve the above object, the technical solution of the battery module provided by the present invention is: a battery module, comprising:
the battery cell units are sequentially stacked in the left-right direction, and the top of each battery cell unit is provided with a sampling connection point;
the sampling connection wire harness comprises a flexible circuit board, the flexible circuit board is fixedly adhered to the top surface of the cell unit, a plurality of cantilever beams are arranged on the flexible circuit board, and the conductive connection parts on the cantilever beams are in conductive connection with the sampling connection points on the corresponding cell units in a one-to-one correspondence manner through conductive connection parts, so that the cantilever beams and the corresponding cell units form signal sampling groups;
each cantilever beam is fixedly arranged on the top surface of the corresponding electric core unit which belongs to the same signal sampling group with the corresponding cantilever beam.
The beneficial effects are that: in the battery module provided by the invention, the cantilever beam is fixedly arranged on the top surface of the corresponding battery cell unit belonging to the same signal sampling group, the cantilever beam and the sampling connection point of the corresponding battery cell unit are relatively fixed, even if the battery cell unit generates horizontal displacement due to thermal expansion, the cantilever beam and the sampling connection point of the corresponding battery cell unit are relatively fixed, the corresponding conductive connecting piece is relatively specified, and the conductive connecting piece can not bear tearing action force, so that the potential safety hazard caused by tearing and falling of the conductive connecting piece is effectively avoided.
As a further improvement, the cantilever beams are fixed on the top surfaces of the corresponding battery cell units in an adhesive fixing mode.
The beneficial effects are that: the mode of adopting sticky fixed is comparatively simple, and it is fixed to facilitate the installation.
As a further improvement, the adhesive strength of the glue used for the cantilever beam adhesive fixation is greater than the adhesive strength of the glue used for the flexible circuit board adhesive fixation.
The beneficial effects are that: the glue used for gluing and fixing the cantilever beam is high in bonding strength, the connection strength is higher, and the situation of tearing and breaking is not easy to occur.
As a further improvement, the cantilever beams are bonded and fixed on the top surfaces of the corresponding battery cell units through UV glue or silica gel.
As a further improvement, a plurality of L-shaped hollow grooves are distributed at the edge of the flexible circuit board at intervals along the left and right directions, each hollow groove comprises a horizontal groove section and a vertical groove section, the horizontal groove section extends along the left and right directions to form the cantilever beam on the flexible circuit board, the width of the vertical groove section of each hollow groove is larger than that of the horizontal groove section, all the hollow grooves comprise the horizontal groove section and the vertical groove section, the horizontal groove section extends along the left and right directions, all the hollow grooves form a first hollow groove group and a second hollow groove group, the two hollow groove groups are distributed along the left and right directions, the horizontal groove section of the hollow groove in the first hollow groove group is located on the left side of the vertical groove section, and the horizontal groove section of the hollow groove in the second hollow groove group is located on the right side of the vertical groove section.
The beneficial effects are that: the horizontal groove section and the vertical groove section of the hollow grooves in the two hollow groove groups are opposite in distribution position, so that the force exerted on the flexible circuit board by the thermally expanded battery cell unit is offset relatively, the stress of the cantilever beam is reduced, and the problem of breaking or degumming at the cantilever beam is avoided.
As a further improvement, the cantilever beam is welded and connected with a nickel sheet, and the nickel sheet is used as the conductive connecting part and is welded and connected with the conductive connecting part.
As a further improvement, a plurality of window holes are distributed in the middle of the flexible circuit board along the left-right direction, reinforcing connecting sheets extending into the window holes are integrally arranged on the flexible circuit board, and the reinforcing connecting sheets are fixedly adhered to the top surfaces of the corresponding battery cell units.
The beneficial effects are that: the flexible circuit board is provided with a plurality of reinforcing connecting sheets, so that the connecting strength of the flexible circuit board and the battery cell unit can be enhanced.
As a further improvement, the adhesive strength of the glue used for the adhesive fixation of the reinforcing connecting sheet is larger than that of the glue used for the adhesive fixation of the flexible circuit board.
The beneficial effects are that: the glue with higher bonding strength is adopted to realize the adhesive fixation of the reinforced connecting sheet, and the effect of locally reinforcing the connection can be effectively played.
As a further improvement, a glue dispensing gap is reserved between the reinforcing connecting sheet and the corresponding window hole.
The beneficial effects are that: arrange some glue clearances around strengthening the connection piece, conveniently realize sticky fixed.
As a further improvement, the reinforcing connecting sheet corresponds to the gap of the adjacent cell units so as to be fixedly connected with the two corresponding adjacent single-core units.
The beneficial effects are that: the reinforcing connection piece corresponds to the gap of the adjacent electric core unit, the fixed connection with the two adjacent electric core units can be realized, and the bonding strength of the electric core units can be improved.
As a further improvement, the cantilever beams are sequentially distributed on the front side and the rear side of the flexible circuit board at intervals along the left-right direction.
Drawings
Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;
fig. 2 is a schematic view of an assembly structure of the cell unit, the sampling connection harness, and the busbar in fig. 1;
FIG. 3 is a schematic view of the connection of the sampling connection harness to the bus bar of FIG. 1;
FIG. 4 is an enlarged view taken at A in FIG. 3;
fig. 5 is an enlarged view of fig. 3 at B.
Description of reference numerals:
100-battery cell unit, 200-sampling connecting wire harness, 300-busbar, 400-reinforced connecting structure, 500-gap, 1-connector, 2-flexible circuit board, 3-sampling connecting point, 4-cantilever beam, 5-hollowed groove, 6-window hole, 7-reinforced connecting sheet, 8-nickel sheet, 10-first hollowed groove group and 11-second hollowed groove group.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the battery module provided by the present invention:
as shown in fig. 1 to 5, the battery module in this embodiment includes a casing, a plurality of battery cell units 100 are sequentially stacked in the casing along a left-right direction, adjacent battery cell units 100 are electrically connected by a bus bar 300, and all the battery cell units are electrically connected to form the battery module. In this embodiment, each battery cell unit 100 includes a single battery cell, and in other embodiments, each battery cell unit may include more than two battery cells arranged in series according to actual situations.
For improving the safety performance, a battery management system is usually arranged corresponding to the battery module, the battery management system collects corresponding signals of each battery cell unit 100 through a sampling connection harness 200 to monitor and manage each battery cell unit, and each battery cell unit is respectively provided with a sampling connection point 3 for being electrically connected with the sampling connection harness to collect corresponding signals.
The sampling connection harness 200 includes a flexible circuit board 2, the flexible circuit board 2 is specifically fixed on the top surface of the electric core unit 100 by pressure-sensitive adhesive bonding, the flexible circuit board 2 here extends in the left-right direction, and is integrally in a strip shape, and the left end of the flexible circuit board 2 is welded with the connector 1 so as to be connected with the battery collecting board.
The border department of both sides is in proper order the fretwork groove 5 of a plurality of L shapes along left right direction interval distribution respectively around flexible circuit board 2, each fretwork groove 5 all includes horizontal groove section and perpendicular groove section, horizontal groove section extends along left right direction, it extends along fore-and-aft direction to erect the groove section, and the width of the perpendicular groove section of each fretwork groove 5 is greater than the width of horizontal groove section, each fretwork groove 5 forms cantilever beam 4 in the border department of flexible circuit board 2 correspondingly, one end is integrative to be set up on flexible circuit board 2 promptly, the relative free overhang of the other end, flexible circuit board 2's front and back both sides have cantilever beam 4 along left right direction interval distribution in proper order respectively.
The overhang end of each cantilever beam 4 has welded nickel piece 8 respectively, and this nickel piece is as electrically conductive connecting portion, and the corresponding electrically conductive connecting piece one-to-one of accessible is electrically conductive with sampling tie point 3 on the corresponding electric core unit and is connected for cantilever beam 4 forms signal sampling group with corresponding electric core unit, and a cantilever beam corresponds an electric core unit promptly, and electrically conductive connecting portion on this cantilever beam 4 is electrically conductive through corresponding electrically conductive connecting piece and the sampling tie point on this electric core unit and is connected. The conductive connecting piece specifically adopts an aluminum wire, one end of the aluminum wire is fixedly connected with the nickel sheet through ultrasonic welding, and the other end of the aluminum wire is connected with the sampling connection point 3 on the electric core unit in a welding manner.
It should be particularly noted that, in this embodiment, each cantilever beam 4 is fixedly disposed on the top surface of the corresponding electrical core unit belonging to the same signal sampling group as the corresponding cantilever beam, and specifically, the cantilever beam 4 is fixed on the top surface of the corresponding electrical core unit by glue. It should be noted that, as shown in fig. 2, after the nickel plate 8 and the aluminum wire are welded and connected, glue is dispensed above the cantilever beam region, so that the pressure-sensitive adhesive covers the nickel plate, the cantilever beam and a part of the aluminum wire, and when the cantilever beam is adhesively fixed on the electrical core below, connection protection for the nickel plate and the aluminum wire can be formed at the same time.
When electric core unit 100 is heated the inflation and when producing horizontal migration, even if appear flexible circuit board 2 and tear the problem of coming unstuck, because cantilever beam 4 direct fixed connection is at corresponding electric core unit 100's top surface, cantilever beam 4 is in relatively fixed position with the sampling tie point 3 that corresponds electric core unit 100, corresponding aluminium silk can not bear great effort of tearing to effectively avoid the aluminium silk fracture and the short circuit risk that brings.
In this embodiment, cantilever beam 4 specifically fixes at the top surface of corresponding electric core unit through the bonding of UV glue, and the adhesive strength of UV glue will be greater than the adhesive strength of pressure sensitive adhesive to better assurance cantilever beam is difficult to break away from the top surface of corresponding electric core unit. Of course, in other embodiments, other types of glue such as silica gel may be used to bond and fix the cantilever beam to the top surface of the corresponding cell unit. Of course, in other embodiments, the cantilever beam may be fixed on the top surface of the battery cell unit by pressure-sensitive adhesive.
When the specific bonding is fixed, firstly, the pressure-sensitive adhesive is coated at the corresponding position on the inner side of the flexible circuit board, the pressure-sensitive adhesive is pressed on the top surface of the electric core unit to realize adhesive fixation, and then, the adhesive is dispensed above the cantilever beam 4 to cover the cantilever beam and the nickel sheet, so that the adhesive fixation of the cantilever beam 4 and the electric core unit 100 is realized. In this embodiment, all the hollow grooves 5 can be classified into a first hollow groove group and a second hollow groove group according to the position relationship between the horizontal groove section and the vertical groove section, the two hollow groove groups are distributed along the left-right direction, as shown in fig. 2, the first hollow groove group 10 is located on the left side, the second hollow groove group 20 is located on the right side, the horizontal groove section of the hollow groove in the first hollow groove group 10 is located on the left side of the vertical groove section, and the horizontal groove section of the hollow groove in the second hollow groove group 20 is located on the right side of the vertical groove section, and the stress at the cantilever beam can be further reduced by the way of relative arrangement of the hollow grooves. In other words, when the battery cell units 100 on both sides are heated and expanded, no matter the battery cell units are transversely squeezed or transversely pulled, the battery cell units are balanced by the flexible circuit board and offset each other, and the acting force on the flexible circuit board and the cantilever beam is reduced, so that the stress of the cantilever beam is reduced.
In order to reduce the condition that the flexible circuit board is degummed in a large area, a plurality of window holes 6 are distributed in the middle of the flexible circuit board along the left and right directions, the flexible circuit board 2 is integrally provided with a reinforcing connecting sheet 7 extending into each window hole 6, a glue dispensing gap is reserved between the reinforcing connecting sheet 7 and the corresponding window hole 6, after the flexible circuit board 2 is bonded and fixed on the top surface of the cell unit, glue is coated on the reinforcing connecting sheet 7, the glue can seep downwards from the glue-dispensing gap, and each reinforcing connecting piece 7 is glued and fixed on the top surface of the corresponding cell unit, so as to form a reinforcing connecting structure 400 at the reinforcing connecting piece 7, the connection strength between the flexible circuit board 2 and the battery cell unit 100 can be enhanced, the large-area degumming condition between the flexible circuit board 2 and the battery cell unit 100 can be avoided, the connection stability of the flexible circuit board and the battery cell unit is improved, and the flexible circuit board is prevented from vibrating up and down in a large range.
Moreover, in order to further improve the structural strength, the reinforcing connecting sheet 7 corresponds to the gap 500 of the adjacent cell unit 100, the applied glue can extend into the gap of the cells, so that the connecting strength is improved, and the reinforcing connecting sheet can be bonded and fixed with the two cells at the same time, so that the bonding strength of the cells can also be improved.
In order to improve the local connection strength, in this embodiment, the adhesive strength of the glue used for fixing the reinforcing connection sheet is greater than the adhesive strength of the glue used for fixing the flexible circuit board, and specifically, the reinforcing connection sheet may be fixed by UV glue. Of course, in other embodiments, the pressure-sensitive adhesive may also be used to achieve the adhesive fixation of the reinforcing connecting sheet to the top surface of the cell unit, but the connection strength may be reduced.
In the battery module that this embodiment provided, because cantilever beam snap-on is at corresponding electric core unit top surface, even if electric core unit produces horizontal displacement because of the thermal energy, the cantilever beam is relatively fixed with the sampling tie point of corresponding electric core unit, and the aluminium silk both ends relatively fixed that corresponds, aluminium silk can not bear and tear the effort to effectively avoid appearing the aluminium silk potential safety hazard that drops and bring.
it differs from example 1 mainly in that: in embodiment 1, the cantilever beam adopts the mode of adhesive fixation to fix the top surface at corresponding electric core unit, under the fixed purpose of assurance cantilever beam, in this embodiment, can set up the screw hole in electric core unit top in advance, fixes the cantilever beam pressure equipment at the top surface of corresponding electric core unit through fastening bolt.
it differs from example 1 mainly in that: in embodiment 1, the conductive connecting member specifically uses an aluminum wire, and in this embodiment, the conductive connecting member specifically uses a nickel strap, and two ends of the nickel strap are correspondingly connected to the sampling connection points of the flexible circuit board and the battery cell unit by welding.
it differs from example 1 mainly in that: in embodiment 1, the cantilever beam is welded and connected with a nickel plate, and then the cantilever beam is electrically connected with the sampling connection point through the conductive connection between the nickel plate and the aluminum wire, in this embodiment, a connection plate in the signal acquisition harness, which includes a common connection plate and an NTC connection plate, may also be adopted as disclosed in the chinese invention patent application with application publication No. CN111295047A, where the common connection plate is a nickel plate, the nickel plate is provided with a bonding pad, the NTC connection plate includes a nickel plate, the nickel plate is provided with a windowing region and a bonding pad, and the windowing region is provided with an NTC device contacting with the flexible circuit board.
Embodiment 5 of the battery module provided by the present invention:
it differs from example 1 mainly in that: in embodiment 1, two rows of cantilever beams are respectively disposed on the front and rear sides of the flexible circuit board, and in this embodiment, the corresponding cantilever beams are disposed only on one side in the front-rear direction of the flexible circuit board.
it differs from example 1 mainly in that: in embodiment 1, the cantilever beam is formed by an L-shaped hollow groove, and in this embodiment, the cantilever beam may also directly and integrally extend outward along the front-back direction to form a structure similar to a fishbone shape.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. 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. A battery module, comprising:
the battery cell units are sequentially stacked in the left-right direction, and the top of each battery cell unit is provided with a sampling connection point;
the sampling connection wire harness comprises a flexible circuit board, the flexible circuit board is fixedly adhered to the top surface of the cell unit, a plurality of cantilever beams are arranged on the flexible circuit board, and the conductive connection parts on the cantilever beams are in conductive connection with the sampling connection points on the corresponding cell units in a one-to-one correspondence manner through conductive connection parts, so that the cantilever beams and the corresponding cell units form signal sampling groups;
it is characterized in that the preparation method is characterized in that,
each cantilever beam is fixedly arranged on the top surface of the corresponding electric core unit which belongs to the same signal sampling group with the corresponding cantilever beam.
2. The battery module according to claim 1, wherein the cantilever beams are fixed to the top surfaces of the corresponding cell units by means of adhesive fixation.
3. The battery module according to claim 2, wherein the adhesive strength of the glue used for the adhesive fixation of the cantilever beams is greater than the adhesive strength of the glue used for the adhesive fixation of the flexible circuit board.
4. The battery module according to claim 3, wherein the cantilever beams are fixed to the top surfaces of the corresponding cell units by UV glue or silica gel bonding.
5. The battery module according to any one of claims 1 to 4, wherein a plurality of L-shaped hollow grooves are distributed at the edge of the flexible circuit board at intervals in the left-right direction, each hollow groove comprises a horizontal groove section and a vertical groove section, the horizontal groove section extends in the left-right direction to form the cantilever beam on the flexible circuit board, the width of the vertical groove section of each hollow groove is greater than that of the horizontal groove section, all the hollow grooves comprise the horizontal groove section and the vertical groove section, the horizontal groove section extends in the left-right direction, all the hollow grooves form a first hollow groove group and a second hollow groove group, the two hollow groove groups are distributed in the left-right direction, the horizontal groove section of the hollow groove in the first hollow groove group is located on the left side of the vertical groove section, and the horizontal groove section of the hollow groove in the second hollow groove group is located on the right side of the vertical groove section.
6. The battery module according to any one of claims 1 to 4, wherein a nickel plate is welded to the cantilever beam, and the nickel plate is welded to the conductive connecting part as the conductive connecting part.
7. The battery module according to any one of claims 1 to 4, wherein a plurality of window holes are distributed in the middle of the flexible circuit board in the left-right direction, reinforcing connecting pieces extending into the window holes are integrally arranged on the flexible circuit board, and each reinforcing connecting piece is adhesively fixed on the top surface of the corresponding battery cell unit.
8. The battery module according to claim 7, wherein the adhesive strength of the glue used for adhesively fixing the reinforcing connecting sheet is greater than that of the glue used for adhesively fixing the flexible circuit board.
9. The battery module according to claim 7, wherein the reinforcing connecting sheet corresponds to the gap between two adjacent cell units so as to be fixedly connected with two corresponding adjacent single cell units.
10. The battery module according to any one of claims 1 to 4, wherein the cantilever beams are sequentially distributed on the front side and the rear side of the flexible circuit board at intervals along the left-right direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745230.6A CN114094271A (en) | 2020-07-29 | 2020-07-29 | Battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745230.6A CN114094271A (en) | 2020-07-29 | 2020-07-29 | Battery module |
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| Publication Number | Publication Date |
|---|---|
| CN114094271A true CN114094271A (en) | 2022-02-25 |
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| CN202010745230.6A Pending CN114094271A (en) | 2020-07-29 | 2020-07-29 | Battery module |
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| US20160372796A1 (en) * | 2014-01-17 | 2016-12-22 | Sanyo Electric Co., Ltd. | Power source device |
| CN208873844U (en) * | 2018-10-18 | 2019-05-17 | 宁德时代新能源科技股份有限公司 | Battery sampling structure and battery modules |
| CN109301143A (en) * | 2018-10-19 | 2019-02-01 | 胜蓝科技股份有限公司 | A kind of anti-tear automobile batteries sampling harness of integration |
| CN209401727U (en) * | 2018-12-26 | 2019-09-17 | 宁德时代新能源科技股份有限公司 | Battery modules |
| CN111295047A (en) * | 2020-03-31 | 2020-06-16 | 安捷利电子科技（苏州）有限公司 | Signal acquisition wiring harness of power battery of vehicle |
| CN212412162U (en) * | 2020-07-29 | 2021-01-26 | 郑州深澜动力科技有限公司 | Battery module |
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