CN220400863U

CN220400863U - Battery cell sampling assembly of battery cell connecting system and battery cell connecting system

Info

Publication number: CN220400863U
Application number: CN202321897081.0U
Authority: CN
Inventors: 葛海龙; 杜宇; 陈海平; 姜佳明
Original assignee: SAIC Motor Corp Ltd
Current assignee: SAIC Motor Corp Ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2024-01-26
Anticipated expiration: 2033-07-18

Abstract

The application relates to a battery cell sampling assembly of a battery cell connecting system and the battery cell connecting system, wherein the battery cell connecting system comprises a plurality of battery cells and a battery cell sampling assembly, the battery cell sampling assembly comprises a conductor part, a thermosensitive element, a connecting piece and a plurality of aluminum bars, and the conductor part comprises two insulating layers, and a temperature sampling loop and a voltage sampling loop which are attached between the two insulating layers; the temperature sampling loop comprises a first flexible die-cutting wire harness, the first flexible die-cutting wire harness comprises a first sampling end and a first connecting end, and the first sampling end is connected with the thermosensitive element; the voltage sampling loop comprises a plurality of second flexible die-cutting wire harnesses, each second flexible die-cutting wire harness comprises a second sampling end and a second connecting end, and each second sampling end is respectively connected with the aluminum bars in a one-to-one correspondence manner; the first connecting end and the second connecting end are respectively connected with the connecting piece. The battery cell sampling assembly is simple in structure, high in automation degree, simple in preparation process and low in cost.

Description

Battery cell sampling assembly of battery cell connecting system and battery cell connecting system

Technical Field

The application relates to the technical field of power batteries, in particular to a battery cell sampling assembly of a battery cell connecting system and the battery cell connecting system.

Background

In the existing vehicle-mounted battery energy storage system, a battery core connecting system comprises a plurality of battery cores, and when the battery cores are grouped, the battery cores are required to be connected in high and low voltage and acquired in signal through a battery core sampling assembly. In the prior art, the conventional application of the battery cell sampling assembly mainly comprises an FPC (Flexible Printed Circuit, a flexible circuit board) and an FFC (Flexible Flat Cable, a flexible flat wire), wherein the FPC has small structural size, high integration level and high automation degree, but the FPC has complex manufacturing process, long period and high cost, the FFC is formed by pressing copper wires, the manufacturing process is simple, the cost is low, but the later process for manufacturing a battery cell connecting system finished product in the later stage is complex, the automation degree is low, and the application is inconvenient.

FDC (Floppy Disk Controller, flexible die-cut circuit board) not only has advantages such as preparation simple process like FFC, has advantages such as degree of automation is high, later stage simple process like FPC simultaneously, but when FDC adopts core voltage and temperature, need connect nickel piece on the circuit board to welding has FPC subassembly etc. of NTC (Negative Temperature Coefficient, refers to negative temperature coefficient heat sensitive element), increases extra technology, and is with high costs.

How to simplify the structure of the cell sampling assembly, improve the degree of automation, simplify the preparation process and reduce the cost is a technical problem to be solved by the person skilled in the art.

Disclosure of Invention

The purpose of this application is to provide a electric core sampling subassembly and electric core connected system of electric core connected system, can simplify the structure of electric core sampling subassembly, improve degree of automation, simplify preparation technology and can reduce cost.

In order to solve the technical problems, the application provides a battery cell sampling assembly of a battery cell connecting system, which comprises a conductor part, a thermosensitive element, a connecting piece and a plurality of aluminum bars, wherein the conductor part comprises two insulating layers, and a temperature sampling loop and a voltage sampling loop which are attached between the two insulating layers; the temperature sampling loop comprises a first flexible die-cutting wire harness, the first flexible die-cutting wire harness comprises a first sampling end and a first connecting end, and the first sampling end is connected with the thermosensitive element; the voltage sampling loop comprises a plurality of second flexible die-cut wire harnesses, each second flexible die-cut wire harness comprises a second sampling end and a second connecting end, and each second sampling end is respectively connected with the aluminum bars in a one-to-one correspondence manner; the first connecting end and the second connecting end are respectively connected with the connecting piece.

The conductor part forms the temperature sampling return circuit through first flexible cross cutting pencil between two-layer insulating layer to form the voltage sampling return circuit through the flexible cross cutting pencil of second, two-layer insulating layer laminating temperature sampling return circuit and voltage sampling return circuit from upper and lower both sides respectively, and the insulating layer can also provide the support for temperature sampling return circuit and voltage sampling return circuit when realizing insulating effect.

The conductor part has the advantages of the FDC, namely, high automation degree and simple post-process.

And moreover, the first sampling end of the first flexible die-cutting wire harness is directly connected with the thermosensitive element, and the second sampling end of the second flexible die-cutting wire harness is directly connected with the aluminum bar, so that the conductor part can be connected with the sampling end without using nickel plates or auxiliary parts such as FPC components welded with NTCs, and the like, thereby simplifying the overall structure, simplifying the manufacturing process, reducing the welding quantity and avoiding influencing the product yield due to the welding quality problem.

Optionally, the first connection end is in plug connection with the connector, and the second connection end is in plug connection with the connector.

Optionally, the first flexible die-cut wire harness is an aluminum material or a copper material, and the second flexible die-cut wire harness is an aluminum material or a copper material.

Optionally, the first flexible die-cut wire harness and the second flexible die-cut wire harness are both formed by die cutting.

Optionally, the side edge of the insulating layer is further provided with a plurality of protrusions extending outwards along the width direction, each protrusion is respectively arranged in one-to-one correspondence with the first sampling end and the second sampling end, and the second sampling end is exposed out of the insulating layer and connected with the aluminum bar.

Optionally, the insulating layer is a PET insulating film or a PI insulating film.

Optionally, the temperature sampling loop, the voltage sampling loop and the two insulating layers are integrated through hot pressing.

Optionally, the first flexible die-cutting wire harness comprises a first connecting section, a first bending part and a first sampling section which are sequentially arranged, the first sampling end is arranged at the end part of the first sampling section, and the first connecting end is arranged at the end part of the first connecting section; the second flexible die-cutting wire harness comprises a second connecting section, a second bending part and a second sampling section which are sequentially arranged, the second sampling end is arranged at the end part of the second sampling section, and the second connecting end is arranged at the end part of the second connecting section; the first connecting section and the second connecting section are sequentially arranged side by side, and the first connecting end and the second connecting end are aligned.

Optionally, the aluminum bars are arranged in two rows, and the conductor part is located between the two rows of the aluminum bars.

The application also provides a battery cell connection system which comprises a plurality of battery cells and the battery cell sampling assembly.

The technical effects of the cell connection system with the cell sampling assembly are similar to those of the cell sampling assembly, and the description is omitted herein for saving the space.

Drawings

Fig. 1 is a schematic structural diagram of a cell sampling assembly according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the cell sampling assembly of FIG. 1 with the insulating layer disposed above removed;

FIG. 3 is a schematic view of the structure of FIG. 2 with the connector removed;

fig. 4 is an enlarged view of the middle P of fig. 2;

fig. 5 is a schematic structural view of an insulating layer with a conductor portion of a cell sampling assembly located above.

In fig. 1 to 5, reference numerals are explained as follows:

1-conductor part, 11-insulating layer, 111-first bump, 112-second bump, 12-temperature sampling loop, 121-first flexible die-cut wire harness, 122-first sampling end, 123-first connecting end, 13-voltage sampling loop, 131-second flexible die-cut wire harness, 132-second sampling end, 133-second connecting end, 134-second sampling section, 135-second bent part, 136-second connecting section;

2-a thermosensitive element;

3-aluminum bar;

4-connector.

Detailed Description

In order to make the technical solution of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings and specific embodiments.

In the existing vehicle-mounted battery energy storage system, a battery core connecting system comprises a plurality of battery cores and battery core sampling assemblies, and when the battery cores are grouped, the battery cores are required to be connected in high and low voltage and acquired in signal through the battery core sampling assemblies.

If the battery cell sampling assembly adopts FPC (Flexible Printed Circuit, flexible circuit board), can make the manufacturing process complicated, the cycle is long and the cost is high, if the battery cell sampling assembly adopts FFC (Flexible Flat Cable, flexible flat line), can make later stage process that later stage made the battery cell connected system finished product complicated, degree of automation is low, it is inconvenient to use, if the battery cell sampling assembly adopts FDC (Floppy Disk Controller, flexible die-cutting circuit board), degree of automation is high, and later stage process is simple, but need connect nickel piece on the circuit board to the welding has NTC (Negative Temperature Coefficient), refer to FPC subassembly etc. of negative temperature coefficient thermal element, add extra technology, the cost is high. The advantages and disadvantages of using FPC, FFC and FDC for the above-described cell sampling assembly are well known to those skilled in the art.

In order to simplify the process and reduce the cost, the embodiment of the application provides a battery cell sampling assembly of a battery cell connecting system and the battery cell connecting system, wherein the battery cell sampling assembly is used for collecting the temperature and the voltage of each battery cell, and concretely, as shown in fig. 1, the sampling assembly of the battery cell connecting system comprises a conductor part 1, a thermosensitive element 2, a connecting piece 4 and a plurality of aluminum bars 3, wherein the plurality of aluminum bars 3 are respectively used for being connected with output poles of the plurality of battery cells in a one-to-one correspondence manner.

The conductor part 1 comprises two insulating layers 11 and a temperature sampling loop 12 and a voltage sampling loop 13 which are attached between the two insulating layers 11, wherein the temperature sampling loop 12 comprises a first flexible die-cutting wire harness 121, the first flexible die-cutting wire harness 121 comprises a first sampling end 122 and a first connecting end 123, the first sampling end 122 is connected with the thermosensitive element 2, the first connecting end 123 is connected with the connecting piece 4 so as to realize transmission of temperature signals, the voltage sampling loop 13 comprises a plurality of second flexible die-cutting wire harnesses 131, the second flexible die-cutting wire harnesses 131 comprise a second sampling end 132 and second connecting ends 133, the second sampling ends 132 of the second flexible die-cutting wire harnesses 131 are respectively connected with the aluminum bars 3 in a one-to-one correspondence manner, and the second connecting ends 133 are connected with the connecting piece 4 so as to realize transmission of voltage signals.

The conductor part 1 forms a temperature sampling loop 12 between two insulating 11 layers through a first flexible die-cutting wire harness 121, and forms a voltage sampling loop 13 through a second flexible die-cutting wire harness 131, the two insulating layers 11 respectively attach the temperature sampling loop 12 and the voltage sampling loop 13 from the upper side and the lower side, and the insulating layers 11 can also provide support for the temperature sampling loop 12 and the voltage sampling loop 13 while realizing an insulating effect.

The conductor part 1 has the advantage of the FDC described above, namely, a high degree of automation and a simple post-process.

Moreover, in this embodiment, the first sampling end 122 of the first flexible die-cutting wire harness 121 is directly connected with the heat-sensitive element 2, and the second sampling end 132 of the second flexible die-cutting wire harness 131 is directly connected with the aluminum bar 3, so that the conductor part 1 in this embodiment can realize the connection of the sampling ends without using nickel sheets or auxiliary parts such as an FPC assembly welded with NTC, thereby simplifying the overall structure, simplifying the manufacturing process, reducing the welding amount, and avoiding influencing the product yield due to the welding quality problem.

Further, the first connection end 123 and the connection piece 4 are in plug connection, and the second connection end 133 and the connection piece 4 are also in plug connection, so that the installation process can be simplified, and the installation efficiency can be improved.

Of course, it is also possible to arrange the first connection end 123 and the second connection end 133 in alignment and form a complete connection terminal, which is plug-connected to the connection element 4, which further simplifies the mounting process.

In this embodiment, flexible cross cutting pencil is including the linkage segment that sets gradually, the portion of bending and sampling section, and wherein, the one end that sampling section was kept away from to the linkage segment is equipped with the link, and the one end that sampling section kept away from the linkage segment is equipped with the sampling end, and the linkage segment of each flexible cross cutting pencil arranges side by side in proper order, can make overall structure more regular to each link of being convenient for is connected with connecting piece 4 and the arrangement of connecting piece 4. Each flexible die-cutting wire harness is bent at the bending part and extends to the thermosensitive element 2 or the aluminum bar 3 connected with the connecting end through the sampling section.

In detail, the first flexible die-cutting wire harness 121 includes a first connection section, a first bending portion and a first sampling section which are sequentially arranged, wherein the first sampling end 122 is arranged at the end of the first sampling section, and the first connection end 123 is arranged at the end of the first connection section. The second flexible die-cutting wire harness 131 comprises a second connecting section 136, a second bending portion 135 and a second sampling section 134 (shown in fig. 3) which are sequentially arranged, wherein the second connecting end 133 is arranged at the end part of the second connecting section 136, the second sampling end 132 is arranged at the end part of the second sampling section 134, and the first connecting section and the second connecting section 136 are sequentially arranged side by side. As shown in fig. 3, the first connection end 123 and the second connection end 133 are arranged in alignment and form a connection terminal, which is plug-connected with the connection piece 4.

In this embodiment, the first flexible die-cutting wire harness 121 may be an aluminum material or a copper material, and the second flexible die-cutting wire harness 131 may be an aluminum material or a copper material. The first flexible die-cut wire harness 121 and the second flexible die-cut wire harness 131 may be both copper materials, aluminum materials, or both copper materials and aluminum materials.

In this embodiment, the first flexible die-cutting wire harness 121 and the second flexible die-cutting wire harness 131 are preferably made of the same material and are formed by punching, so that the forming process can be simplified and the processing cost can be reduced.

Further, the first flexible die-cut wire harness 121 and the second flexible die-cut wire harness 131 are preferably aluminum materials, so that the cost can be further reduced.

As shown in the drawing, the side edges of the insulating layer 11 are further extended outward in the width direction to form protrusions, each protrusion is disposed corresponding to the first sampling end 122 and each second sampling end 132, and the second sampling ends 132 are exposed out of the insulating layer 11 to be connected with the aluminum bar 3. So arranged, the supporting strength of the insulating layer 11 to the second sampling end 132 can be ensured.

As shown in fig. 5, the protrusions include a first protrusion 111 and a second protrusion 112, wherein the first protrusion 111 is disposed corresponding to the first sampling end 122, and the second protrusion 112 is disposed corresponding to the second sampling end 132.

In this embodiment, the insulating layer 11 may be a PET (Polyethylene terephthalate ) Film or a PI (Polyimide Film) Film, which is not particularly limited herein. The two insulating layers 11 and the conductor part 1 can be integrated through a hot pressing process, and the forming process is simpler.

As shown in fig. 1 to 3, the plurality of aluminum bars 3 are arranged in two rows, specifically, the number and arrangement condition of each row of aluminum bars 3 can be set according to the number and arrangement condition of the electric cores, each aluminum bar 3 and the corresponding electric core output electrode are connected through welding, and serve as high-voltage electric connection, the conductor part 1 is located between the two rows of aluminum bars 3, at this time, the bending directions of the second bending parts 135 are different, part of the second bending parts 135 are bent in the direction of one row of aluminum bars 3, and part of the second bending parts 135 are bent in the direction of the other row of aluminum bars 3. The second sampling ends 132 are respectively distributed on both sides of the conductor portion 1 in the width direction and are respectively connected to the corresponding aluminum bars 3.

The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.

Claims

1. The battery cell sampling assembly of the battery cell connecting system is characterized by comprising a conductor part (1), a thermosensitive element (2), a connecting piece (4) and a plurality of aluminum bars (3), wherein the conductor part (1) comprises two insulating layers (11), and a temperature sampling loop (12) and a voltage sampling loop (13) which are attached between the two insulating layers (11);

the temperature sampling loop (12) comprises a first flexible die-cutting wire harness (121), the first flexible die-cutting wire harness (121) comprises a first sampling end (122) and a first connecting end (123), and the first sampling end (122) is connected with the thermosensitive element (2);

the voltage sampling circuit (13) comprises a plurality of second flexible die-cutting wire harnesses (131), the second flexible die-cutting wire harnesses (131) comprise second sampling ends (132) and second connecting ends (133), and the second sampling ends (132) are respectively connected with the aluminum bars (3) in a one-to-one correspondence manner;

the first connecting end (123) and the second connecting end (133) are respectively connected with the connecting piece (4).

2. The cell sampling assembly of a cell connection system according to claim 1, characterized in that the first connection end (123) is plug-connected with the connection piece (4) and the second connection end (133) is plug-connected with the connection piece (4).

3. The cell sampling assembly of the cell connection system of claim 1, wherein the first flexible die-cut wire harness (121) is an aluminum or copper material and the second flexible die-cut wire harness (131) is an aluminum or copper material.

4. The cell sampling assembly of the cell connection system of claim 3, wherein the first flexible die cut wire harness (121) and the second flexible die cut wire harness (131) are each formed by die cutting.

5. The cell sampling assembly of a cell connection system according to any one of claims 1-4, wherein the side edges of the insulating layer (11) are further provided with a plurality of protrusions extending outwards in the width direction, each protrusion being arranged in a one-to-one correspondence with the first sampling end (122) and the second sampling end (132), respectively, and the second sampling end (132) being exposed out of the insulating layer (11) and being connected to the aluminium bar (3).

6. Cell sampling assembly of a cell connection system according to any one of claims 1-4, characterized in that the insulating layer (11) is a PET insulating film or a PI insulating film.

7. Cell sampling assembly of a cell connection system according to any of claims 1-4, characterized in that the temperature sampling circuit (12) and the voltage sampling circuit (13) and the two insulating layers (11) are integrated by thermo-compression.

8. The cell sampling assembly of a cell connection system according to any one of claims 1-4, wherein the first flexible die cut wire harness (121) comprises a first connection section, a first bend and a first sampling section arranged in sequence, the first sampling end (122) being provided at an end of the first sampling section, the first connection end (123) being provided at an end of the first connection section;

the second flexible die-cutting wire harness (131) comprises a second connecting section (136), a second bending part (135) and a second sampling section (134) which are sequentially arranged, the second sampling end (132) is arranged at the end part of the second sampling section (134), and the second connecting end (133) is arranged at the end part of the second connecting section (136);

the first and second connection sections (136) are arranged side by side in sequence, and the first and second connection ends (123, 133) are arranged in alignment.

9. Cell sampling assembly of a cell connection system according to any of claims 1-4, characterized in that the aluminium bars (3) are arranged in two rows and the conductor portions (1) are located between the two rows of aluminium bars (3).

10. A cell connection system comprising a plurality of cells and a cell sampling assembly according to any one of claims 1 to 9.