CN217086812U - Battery module FPC and monomer collection unit's integrated configuration - Google Patents

Abstract

The utility model provides a combined structure of a battery module FPC and a monomer acquisition unit, which comprises a flexible substrate, a plurality of switching FPC components and an acquisition component; the flexible substrate is arranged on the surface of one side of the battery where the pole is located; the flexible substrate is provided with a plurality of first conductive parts, the first conductive parts are respectively electrically connected with different poles of the battery, and the first conductive parts also extend outwards in the direction away from the battery; each switching FPC assembly is detachably arranged on the end face, far away from the battery, of the flexible substrate; one end of the switching FPC assembly is fixedly connected with the first conductive part, the other end of the switching FPC assembly extends along the length direction of the flexible substrate, and the switching FPC assembly also extends out of the edge of the flexible substrate; each transfer FPC assembly is provided with a plurality of second conductive parts which are electrically connected with the first conductive parts in a one-to-one correspondence manner; the collection assembly is arranged on the outer side of the battery and is electrically connected with the second conductive part.

Description

Battery module FPC and monomer collection unit's integrated configuration

Technical Field

The utility model relates to a lithium cell monomer collection equipment technical field especially relates to a battery module FPC and monomer collection unit's integrated configuration.

Background

The lithium ion battery has the advantages of high energy density, low self-discharge rate, stable discharge voltage, long cycle life and the like, and is widely applied to multiple fields, so that the battery in the new energy industry can be matched with a single acquisition unit special for a Battery Management System (BMS) in the use process at present, the voltage and other parameters of the battery are acquired, and the safety and the reliability of the lithium ion battery in the use process are ensured. As shown in fig. 1, a plurality of cells are arranged in sequence, and the polarities of the poles at the end portions of adjacent cells are different.

The current modes of the flexible printed circuit board FPC and the single acquisition unit are used for acquiring parameters of each lithium battery of the battery module, the flexible printed circuit board FPC is connected with electrodes of the battery, connectors are arranged on the edge of the flexible printed circuit board FPC and the single acquisition unit, and then the connectors on the FPC and the connectors on the single acquisition unit are connected through the switching wiring harness. Because FPC itself is thinner, the height of connector obviously surpasss FPC, including the switching pencil need buckle in certain space, this kind makes FPC and monomer collection unit's overall arrangement receive adverse effect in the battery box, and is all very inconvenient to extension and maintenance moreover.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a battery module FPC and monomer collection unit's integrated configuration that the overall arrangement was walked freely, whole height descends.

The technical scheme of the utility model is realized like this: the utility model provides a combined structure of a battery module FPC and a monomer acquisition unit, which comprises a flexible substrate (1), a plurality of switching FPC components (2) and acquisition components (3);

the flexible substrate (1) is arranged on the surface of one side where the pole of the battery is located; the flexible substrate (1) is provided with a plurality of first conductive parts (100), the first conductive parts (100) are respectively electrically connected with different poles of the battery, and the first conductive parts (100) extend outwards in the direction away from the battery;

each switching FPC assembly (2) is detachably arranged on the end face, far away from the battery, of the flexible substrate (1); one end of the switching FPC component (2) is fixedly connected with the first conductive part (100), the other end of the switching FPC component (2) extends along the length direction of the flexible substrate (1), and the switching FPC component (2) also extends out of the edge of the flexible substrate (1); each transfer FPC component (2) is provided with a plurality of second conductive parts (200), and the second conductive parts (200) are electrically connected with the first conductive parts (100) in a one-to-one correspondence manner;

the collection assembly (3) is arranged on the outer side of the battery, the collection assembly (3) is fixedly connected with one end, extending out of the flexible substrate (1), of each switching FPC assembly (2), and the collection assembly (3) is electrically connected with the second conductive part (200).

On the basis of the technical scheme, preferably, the flexible substrate (1) further comprises a first body (11) and a cover plate (12), the first body (11) is arranged around the poles of the batteries, a plurality of embedded grooves (13) are formed in the end face, far away from the batteries, of the first body (11), and the first conductive part (100) is arranged in each embedded groove (13); the cover plate (12) is buckled on the end face, far away from the battery, of the first body (11), a plurality of first through holes (14) which are vertically communicated are formed in the cover plate (12), and one end, far away from the battery pole, of the first conductive part (100) is embedded in the first through holes (14); the first body (11) or the cover plate (12) is insulated from the first conductive part (100).

Preferably, a second through hole (15) for a pole of a battery to penetrate is further formed in the flexible substrate (1), the second through hole (15) penetrates through the first body (11) and the cover plate (12) in sequence, the second through hole (15) is communicated with the caulking groove (13), and the caulking groove (13) is further arranged around the second through hole (15).

Preferably, the switching FPC assembly (2) further comprises a second body (21) and a plurality of first conductive contact pieces (22), a through cavity is arranged in the length extending direction of the second body (21), and the second body (21) is arranged on the end face, far away from the battery, of the cover plate (12); one end of the second body (21) is provided with a third through hole (23), the other end of the second body (21) is provided with a plurality of first conductive contact pieces (22), and each second conductive contact piece (32) is arranged at intervals along the width extending direction of the second body (21); a plurality of second conductive parts (200) are embedded in the cavity, and one end of each second conductive part (200) penetrates through the third through hole (23) and is fixedly connected with the first conductive part (100); the other end of the second conductive part (200) is electrically connected with a first conductive contact (22).

More preferably, the second body (21) is adhered to the cover plate (12); the second body (21) is made of a flexible material.

Further preferably, the collecting assembly (3) comprises a third body (31), a plurality of second conductive contact pieces (32) and a voltage monitoring chip (33); a plurality of second conductive contact pieces (32) are arranged at the edge of the third body (31) in the width extending direction, and the second conductive contact pieces (32) are electrically connected with the first conductive contact pieces (22) in a one-to-one correspondence manner; the voltage monitoring chip (33) is arranged at the non-edge position of the third body (31), and the input end of the voltage monitoring chip (33) is respectively electrically connected with different second conductive contact pieces (32) in a one-to-one correspondence manner.

Still further preferably, the length of the second conductive contact piece (32) is larger than that of the first conductive contact piece (22), the second conductive contact piece (32) and the first conductive contact piece (22) are arranged at intervals, and the second conductive contact piece (32) and the first conductive contact piece (22) are welded.

Preferably, the voltage monitoring chip (33) is BQ76PL 455A.

On the basis of the technical scheme, preferably, the battery is further provided with an explosion-proof valve (4), the flexible substrate (1) is correspondingly provided with a through fourth through hole (16), and the fourth through hole (16) is opposite to the explosion-proof valve (4).

The utility model provides a pair of battery module FPC and monomer collection unit's integrated configuration has following beneficial effect for prior art:

(1) the scheme adopts a detachable flexible substrate and switching FPC assembly to replace a common connector and wiring harness switching mode, preassembles the flexible substrate and the switching FPC assembly in a matter bonding preassembly mode, and then permanently fixes and forms the switching FPC assembly with the flexible substrate or an acquisition assembly respectively; compared with the existing signal transmission structure, the use of a switching wiring harness and a connector is omitted, the overall thickness of a transmission line is reduced, and the precious space in the battery PACK is saved;

(2) the switching FPC assembly adopts a detachable design, and the battery information acquisition, expansion and maintenance adopting the structure are very convenient;

(3) the first conductive contact piece and the second conductive contact piece are directly welded, so that an intermediate switching link and a large number of contacts are omitted, the measurement error possibly caused by more contacts and poor contact of the contacts can be reduced, and the accuracy and the reliability of battery information acquisition are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a perspective view of a lithium ion battery assembly;

fig. 2 is a perspective view of a combination structure of a battery module FPC and a single collection unit of the present invention;

fig. 3 is a top view of a combination structure of the battery module FPC and the single collecting unit of the present invention;

fig. 4 is a perspective view of the flexible substrate of the combined structure of the battery module FPC and the single collecting unit of the present invention;

fig. 5 is an exploded perspective view of a structural substrate of a battery module FPC and a single collection unit according to the present invention;

fig. 6 is a perspective view of a switching FPC assembly of a combined structure of a battery module FPC and a single collection unit of the present invention;

fig. 7 is a perspective view of the collection assembly of the combined structure of the battery module FPC and the single collection unit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 2-4, the utility model provides a combined structure of a battery module FPC and a single acquisition unit, which comprises a flexible substrate 1, a plurality of switching FPC assemblies 2 and an acquisition assembly 3;

the flexible substrate 1 is arranged on the surface of one side where the pole of the battery is located; the flexible substrate 1 is provided with a plurality of first conductive parts 100, the first conductive parts 100 are respectively electrically connected with different poles of the battery, and the first conductive parts 100 extend outwards in the direction away from the battery; the flexible substrate 1 is a mounting base for the relay FPC assembly, and is attached to the end face of the battery.

Each switching FPC component 2 is detachably arranged on the end face, far away from the battery, of the flexible substrate 1; one end of the switching FPC component 2 is fixedly connected with the first conductive part 100, the other end of the switching FPC component 2 extends along the length direction of the flexible substrate 1, and the switching FPC component 2 also extends out of the edge of the flexible substrate 1; each of the FPC assemblies 2 has a plurality of second conductive portions 200, and the second conductive portions 200 are electrically connected to the first conductive portions 100 in a one-to-one correspondence. The main body of each switching FPC component 2 is made of flexible FPC, can adapt to a battery packaging structure to adjust the trend, and is particularly suitable for wiring in a compact space or a special-shaped space. Can dismantle the setting between switching FPC subassembly 2 and the flexible substrate 1, the flexible substrate 1 of placing promptly can play the predetermined position function to switching FPC subassembly 2.

The collection assembly 3 is arranged outside the battery, the collection assembly 3 is fixedly connected with one end of each switching FPC assembly 2 extending out of the flexible substrate 1, and the collection assembly 3 is electrically connected with the second conductive part 200. The collection assembly 3 is a component for collecting the electric quantity of the battery, and is electrically connected with each battery in a one-to-one correspondence manner through the flexible substrate 1 and each switching FPC assembly 2, and because the existing connector and wiring harness are not used in the scheme, the whole thickness of the collection unit is reduced, the arrangement of the collection assembly 3 is more flexible, and because the used external contact points are less, cables are less, the defects of poor contact and low measurement precision caused by more contacts can be improved to a certain extent.

As shown in fig. 2-5, the flexible substrate 1 is matched with the terminal surface of each battery with the terminal, so that the terminal can be extended out, and the first conductive part 100 is electrically connected with each terminal, thereby simplifying the connection mode of the switching FPC assembly 2 and the electrode. It can be seen from the figure that the flexible substrate 1 further includes a first body 11 and a cover plate 12 in addition to the first conductive part 100, the first body 11 is disposed around the poles of the batteries, a plurality of embedding grooves 13 are disposed on the end surface of the first body 11 away from the batteries, and the first conductive part 100 is disposed in each embedding groove 13; the cover plate 12 is buckled on the end face, far away from the battery, of the first body 11, the cover plate 12 is provided with a plurality of first through holes 14 which are vertically penetrated, and one end, far away from the battery pole, of the first conductive part 100 is embedded in the first through holes 14; the first body 11 or the cover plate 12 is insulated from the first conductive part 100. In order to facilitate the electrode to penetrate through the flexible substrate 1, a second through hole 12 for the pole of the battery to penetrate through is further formed in the flexible substrate 1, the second through hole 15 sequentially penetrates through the first body 11 and the cover plate 12, the second through hole 15 is communicated with the embedded groove 13, and the embedded groove 13 is further arranged around the second through hole 15.

As can be seen from the exploded view shown in fig. 5, the caulking groove 13 is divided into two parts communicating with each other: one part is an annular caulking groove which is arranged around the electrode, and the other part is communicated with the annular caulking groove and extends towards the other electrode of the same battery in a cuboid shape. The annular caulking grooves at different electrodes are all the same in shape, but the extension lengths of the rectangular parallelepiped-shaped caulking grooves at different electrodes are different. Correspondingly, each first conductive part 100 is also divided into two parts, one part is embedded in the annular embedding groove and is abutted against the side surface of the electrode passing through the second through hole 15, and the other part is arranged in the rectangular parallelepiped embedding groove and passes through the first through hole 14 to extend outwards of the cover plate 12. The flexible substrate 1 leads out the voltage signal at the electrode through the first conductive part 100, so as to facilitate the electrical connection of the switching FPC assembly 2. As can also be seen from fig. 5, the positions of the first through holes 14 on different cells are also different, and the first through holes 14 in each group are not collinear in the cell width direction; the design can be convenient for switching FPC subassembly 2 to walk the line, avoids taking place the interference phenomenon.

As can be seen from fig. 6 in conjunction with fig. 5, the relay FPC assembly 2 functions as a substitute for the existing connector and connection harness. The transfer FPC assembly 2 comprises a second body 21 and a plurality of first conductive contact pieces 22 besides the second conductive part 200, wherein a through cavity is arranged in the length extending direction of the second body 21, and the second body 21 is arranged on the end face, away from the battery, of the cover plate 12; one end of the second body 21 is provided with a third through hole 23, the other end of the second body 21 is provided with a plurality of first conductive contact pieces 22, and each second conductive contact piece 32 is arranged at intervals along the width extending direction of the second body 21; a plurality of second conductive parts 200 are embedded in the cavity, and one end of each second conductive part 200 passes through the third through hole 23 and is fixedly connected with a first conductive part 100; the other end of the second conductive part 200 is electrically connected to a first conductive contact 22. As can be seen, the relay FPC assembly 2 plays a role of signal transmission. The second body 21 is made of a flexible insulating material, the second conductive part 200 is inserted into the second body 21, a third through hole 23 penetrating in the vertical direction is formed at one end of the second body 21 close to the first conductive part 100, and one end of the second conductive part 200 is fixedly connected with the first conductive part 100 extending out of the first through hole 14 through the third through hole 23. The end of each second conductive portion 200 may be fixed to first conductive portion 100 by soldering or bonding. The other end of each second conductive part 200 is fixedly connected to the first conductive contact pieces 22 in a one-to-one correspondence. The first conductive contact 22 is of a thin-walled structure. The tail end of the adapter FPC assembly 2 may also be bent as required.

In a preferred embodiment, the second body 21 and the cover plate 12 are preferably bonded; the second body 21 is made of a flexible material. The second body 21 can be bent freely according to the requirement, so as to adapt to the requirement of wiring.

As shown in fig. 7, the collecting assembly 3 includes a third body 31, a plurality of second conductive contact pieces 32 and a voltage monitoring chip 33; a plurality of second conductive contact pieces 32 are arranged at the edge of the third body 31 in the width extending direction, and the second conductive contact pieces 32 are electrically connected with the first conductive contact pieces 22 in a one-to-one correspondence manner; the voltage monitoring chip 33 is disposed at a non-edge position of the third body 31, and input terminals of the voltage monitoring chip 33 are respectively electrically connected to different second conductive contact pieces 32 in a one-to-one correspondence manner. In a preferred embodiment, the voltage monitoring chip 33 may be BQ76PL 455A. The chip is produced by a Texas instrument formula, CAN detect the electric quantity of the battery, supports the electric quantity detection of 16 batteries at most, has a battery balancing function, and CAN communicate with the BMS through a CAN bus transceiver and the same type of chip extension or an asynchronous transceiver. The chip is easy to obtain, and the wiring diagram and the technical manual are easy to obtain while the chip is obtained. Two poles of each battery are sequentially connected to each adjacent VSENSE port of the voltage monitoring chip 33 through the flexible substrate 1 and each switching FPC assembly 2. The specific wiring circuit and the equalizing circuit are described in detail in the chip handbook, and are not described herein again. The second conductive contact 32 is also of a thin plate-like structure. The third body 31 may be made of a conventional printed circuit board.

As can be seen from fig. 2 and 3, the length of the second conductive contact piece 32 is greater than that of the first conductive contact piece 22, the second conductive contact piece 32 is spaced apart from the first conductive contact piece 22, and the second conductive contact piece 32 is welded to the first conductive contact piece 22. The larger surface area of the second conductive contacts 32 facilitates the stacking and soldering of the second conductive contacts 32 to the first conductive contacts 22.

In a further improvement point, as the battery is usually provided with the explosion-proof valve 4, in order to realize the normal opening function of the explosion-proof valve, abdication setting is carried out on the flexible substrate 1. Namely, the flexible substrate 1 is correspondingly provided with a through fourth through hole 16, and the fourth through hole 16 is arranged opposite to the explosion-proof valve 4.

The utility model discloses a use method does: the flexible substrate 1 is arranged on the surfaces of the batteries which are arranged in sequence, the electrodes respectively penetrate through the second through holes 15, the electrodes are electrically connected with the first conductive part 100 in the flexible substrate 1, and further, the transfer FPC assembly 2 is arranged on the end face, far away from the batteries, of the flexible substrate 1, and electric signals at the electrodes are sent into the voltage monitoring chip 33 through the second conductive part 200, the first conductive contact piece 22 and the second conductive contact piece 32. The overall structure is flattened, the space in the vertical direction is reduced, and the space of the battery PACK is better adapted.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a battery module FPC and monomer acquisition unit's integrated configuration which characterized in that: comprises a flexible substrate (1), a plurality of switching FPC components (2) and an acquisition component (3);

the flexible substrate (1) is arranged on the surface of one side where the pole of the battery is located; the flexible substrate (1) is provided with a plurality of first conductive parts (100), the first conductive parts (100) are respectively electrically connected with different poles of the battery, and the first conductive parts (100) extend outwards in the direction away from the battery;

each switching FPC assembly (2) is detachably arranged on the end face, far away from the battery, of the flexible substrate (1); one end of the switching FPC component (2) is fixedly connected with the first conductive part (100), the other end of the switching FPC component (2) extends along the length direction of the flexible substrate (1), and the switching FPC component (2) also extends out of the edge of the flexible substrate (1); each transfer FPC component (2) is provided with a plurality of second conductive parts (200), and the second conductive parts (200) are electrically connected with the first conductive parts (100) in a one-to-one correspondence manner;

the acquisition assembly (3) is arranged on the outer side of the battery, the acquisition assembly (3) is fixedly connected with one end, extending out of the flexible substrate (1), of each switching FPC assembly (2), and the acquisition assembly (3) is electrically connected with the second conductive part (200).

2. The combined structure of the battery module FPC and the single collecting unit as claimed in claim 1, wherein: the flexible substrate (1) further comprises a first body (11) and a cover plate (12), the first body (11) is arranged around the poles of the batteries, a plurality of embedding grooves (13) are formed in the end face, far away from the batteries, of the first body (11), and the first conductive part (100) is arranged in each embedding groove (13); the cover plate (12) is buckled on the end face, far away from the battery, of the first body (11), a plurality of first through holes (14) which are vertically communicated are formed in the cover plate (12), and one end, far away from the battery pole, of the first conductive part (100) is embedded in the first through holes (14); the first body (11) or the cover plate (12) is insulated from the first conductive part (100).

3. The combined structure of the battery module FPC and the single collecting unit as claimed in claim 2, wherein: the flexible substrate (1) is further provided with a second through hole (15) for a pole of a battery to penetrate through, the second through hole (15) penetrates through the first body (11) and the cover plate (12) in sequence, the second through hole (15) is communicated with the embedded groove (13) in a mutual mode, and the embedded groove (13) is further arranged around the second through hole (15).

4. The combined structure of the battery module FPC and the single collecting unit as claimed in claim 2, wherein: the switching FPC assembly (2) further comprises a second body (21) and a plurality of first conductive contact pieces (22), a through cavity is arranged in the length extending direction of the second body (21), and the second body (21) is arranged on the end face, far away from the battery, of the cover plate (12); one end of the second body (21) is provided with a third through hole (23), the other end of the second body (21) is provided with a plurality of first conductive contact pieces (22), and each second conductive contact piece (32) is arranged at intervals along the width extending direction of the second body (21); a plurality of second conductive parts (200) are embedded in the cavity, and one end of each second conductive part (200) penetrates through the third through hole (23) and is fixedly connected with the first conductive part (100); the other end of the second conductive part (200) is electrically connected with a first conductive contact (22).

5. The combined structure of the battery module FPC and the monomer collecting unit as claimed in claim 4, wherein: the second body (21) is adhered to the cover plate (12); the second body (21) is made of a flexible material.

6. The combined structure of the battery module FPC and the monomer collecting unit as claimed in claim 4, wherein: the acquisition assembly (3) comprises a third body (31), a plurality of second conductive contact pieces (32) and a voltage monitoring chip (33); a plurality of second conductive contact pieces (32) are arranged at the edge of the third body (31) in the width extending direction, and the second conductive contact pieces (32) are electrically connected with the first conductive contact pieces (22) in a one-to-one correspondence manner; the voltage monitoring chip (33) is arranged at the non-edge position of the third body (31), and the input end of the voltage monitoring chip (33) is respectively electrically connected with different second conductive contact pieces (32) in a one-to-one correspondence manner.

7. The combined structure of the battery module FPC and the single collecting unit as claimed in claim 6, wherein: the length of the second conductive contact piece (32) is larger than that of the first conductive contact piece (22), the second conductive contact piece (32) and the first conductive contact piece (22) are arranged at intervals, and the second conductive contact piece (32) and the first conductive contact piece (22) are welded.

8. The combined structure of the battery module FPC and the single collecting unit as claimed in claim 6, wherein: the voltage monitoring chip (33) is BQ76PL 455A.

9. The combined structure of the battery module FPC and the single collecting unit as claimed in claim 1, wherein: the battery is also provided with an explosion-proof valve (4), the flexible substrate (1) is correspondingly provided with a through fourth through hole (16), and the fourth through hole (16) is opposite to the explosion-proof valve (4).

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