CN219696662U - CCS assembly capable of preventing thermal diffusion and battery module - Google Patents

Abstract

The utility model provides a CCS component capable of preventing heat diffusion and a battery module, and belongs to the technical field of battery manufacturing. The CCS assembly for preventing thermal diffusion includes a thermal shield, a collector, and a bus bar. The heat insulation piece can separate heat, can isolate the heat conduction of the thermal runaway battery core to other battery cores, and reduces the risk of heat diffusion; the busbar carries out the electricity with two electric cores and connects, gathers voltage and the temperature that the piece can gather a plurality of electric cores, conveniently obtains real-time voltage signal and the real-time temperature signal of a plurality of electric cores, and with gathering piece and busbar integrated respectively and fixed in on the insulating part, overall structure is compact, simple structure, commonality are stronger, can batch, standardized production, have shortened production cycle and reduced manufacturing cost.

Description

CCS assembly capable of preventing thermal diffusion and battery module

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a CCS assembly capable of preventing heat diffusion and a battery module.

Background

Along with the development of economy and the progress of science and technology, the power battery is widely applied to industries such as electric automobiles. In order to ensure that the power battery can operate within a specified voltage range and temperature range, it is necessary to collect a voltage signal and a temperature signal for each battery cell in the battery module. The CCS component is a battery module collection integrated piece, is an important structure for integrated electric connection, voltage collection and temperature collection, and is generally used for collecting voltage signals and temperature signals of the battery in the prior art. The integrated form of CCS subassembly is various, and the integrated form of CCS subassembly includes injection molding buckle hot melt integrated scheme, PET hot pressing membrane integrated scheme, PC piece and pastes integrated scheme. The injection molding piece buckle hot melting integration scheme needs to open an injection mold, and has high cost; the integral structure strength of the PET hot-pressing film integration scheme and the PC sheet pasting integration scheme is low, and the production, the assembly and the positioning are difficult. And the three schemes can not bear the high-temperature damage of the material sprayed out of the thermal runaway of the battery cell, and can not effectively prevent the thermal runaway.

Disclosure of Invention

The present utility model aims to solve the above-mentioned drawbacks of the prior art and to provide a CCS assembly and a battery module for preventing heat diffusion.

In a first aspect, the present utility model provides a CCS assembly for preventing thermal diffusion, disposed on top of a plurality of electrical cells, including a heat insulating member, a collecting member integrally fixed on the heat insulating member, and at least one busbar; and two side ends of one busbar are respectively connected with the positive electrodes or the negative electrodes of the two battery cells, and the acquisition piece is used for acquiring the voltage and the temperature of the plurality of battery cells.

Further, the heat insulating piece is provided with a marking part for marking the positive electrode and the negative electrode respectively.

Further, the heat insulating piece is a mica sheet.

Further, the bus bars and the collecting pieces are adhered to the mica sheets.

Further, the bus bar is provided with a positioning hole which can be welded with the pole of the battery cell.

Further, chamfer angles are arranged on the periphery of the busbar.

Further, the collecting piece is arranged in the middle of the mica sheet along the axis of the mica sheet, the number of the bus bars is multiple, the bus bars are respectively arranged on the mica sheet and located on two sides of the collecting piece, and the collecting piece is parallel to the axis of the mica sheet to form two conductive parts side by side, and the number of the bus bars in each conductive part is the same.

Further, the mica sheet is a gold mica sheet, and the busbar is an aluminum busbar.

Further, the collection piece comprises a low-voltage connector, a plurality of nickel plates and a circuit board with the function of collecting the voltage and the temperature of the battery cell, wherein the low-voltage connector is connected to one end of the circuit board, one end of each nickel plate is connected to the middle part of the circuit board, and the other end of each nickel plate is connected to one busbar.

In a second aspect, the present utility model further provides a battery module, including a plurality of electric cells and the CCS assembly according to any one of the first aspect, the CCS assembly is disposed on the plurality of electric cells, at least one bus bar is provided, and two side ends of one bus bar are respectively connected with the positive electrodes or the negative electrodes of the two electric cells.

The CCS component and the battery module for preventing heat diffusion have the following beneficial effects:

the heat insulation piece can separate heat, can isolate the thermal conduction of the thermal runaway battery cell to other battery cells, and reduce the risk of thermal diffusion; the busbar carries out the electricity with two electric cores and connects, gathers voltage and the temperature that the piece can gather a plurality of electric cores, conveniently obtains real-time voltage signal and the real-time temperature signal of a plurality of electric cores, and with gathering piece and busbar integrated respectively and fixed in on the insulating part, overall structure is compact, simple structure, commonality are stronger, can batch, standardized production, have shortened production cycle and reduced manufacturing cost.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model. In the drawings, like reference numerals are used to identify like elements. The drawings, which are included in the description, illustrate some, but not all embodiments of the utility model. Other figures can be derived from these figures by one of ordinary skill in the art without undue effort.

FIG. 1 is a schematic diagram of a CCS assembly for preventing thermal diffusion according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a CCS module for preventing thermal diffusion according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a heat diffusion preventing CCS module according to an embodiment of the utility model.

In the figure: 1-heat insulation part, 2-bus bar, 3-collection part, 31-circuit board, 32-low voltage connector, 33-nickel plate and 4-cell.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be arbitrarily combined with each other.

Please refer to fig. 1-3. The CCS component for preventing heat diffusion is arranged at the top of a plurality of battery cells 4 and comprises a heat insulation piece 1, a collecting piece 3 and at least one busbar 2, wherein the collecting piece 3 and the at least one busbar 2 are respectively integrated and fixed on the heat insulation piece 1; the two side ends of one busbar 2 are respectively connected with the positive electrodes or the negative electrodes of two battery cells 4, and the acquisition piece 3 is used for acquiring the voltage and the temperature of a plurality of battery cells 4.

Here, one side end of one busbar 2 is connected to the positive electrode of one cell 4, and the other side end is connected to the negative electrode of the other cell 4, so that the series connection of the two cells 4 is realized; one side end of one busbar 2 is connected with the positive electrode of the first electric core 4, the other side end is connected with the positive electrode of the second electric core 4, one side end of the other busbar 2 is connected with the negative electrode of the first electric core 4, the other side end is connected with the negative electrode of the second electric core 4, and the series connection of the two electric cores 4 is realized.

Specifically, the heat insulating member 1 may be a heat insulating member 1 made of a material having a heat insulating function, and the heat insulating member 1 may be one of a glass fiber board, an asbestos board, a rock wool board, a silicate board, an aerogel felt board, and a vacuum board.

The heat insulator 1 may be provided with a marking portion for marking the positive electrode and the negative electrode, respectively.

Specifically, the number of the identification parts can be two, and the two identification parts respectively identify the positive electrode and the negative electrode, so that the identification is convenient.

The insulation 1 may be a mica sheet.

Specifically, the CCS component comprises a mica sheet, a busbar 2 and a collecting piece 3 for collecting the voltage and the temperature of a current core 4, wherein the mica sheet is used for fixing the busbar 2 and the collecting piece 3, has good structural rigidity, can ensure the dimensional stability of the CCS component, is convenient to produce and assemble, has good high temperature resistance, can effectively resist the high Wen Wuzhi burning of the thermal runaway ejection of the current core 4, isolates the thermal conduction of the thermal runaway current core 4 to other current cores 4, and reduces the thermal diffusion risk.

The busbar 2 and the collecting piece 3 can be adhered to the mica sheet.

Specifically, the mica sheet and the busbar 2 are bonded through double-sided adhesive tape, and the mica sheet and the collecting piece 3 are bonded through double-sided adhesive tape, and are integrated into a CCS assembly through the connection.

The busbar 2 is provided with a positioning hole which can be welded with the pole of the battery cell 4.

Specifically, the CCS assembly is fixed above the battery cell 4, and the positive electrode or the negative electrode post of the battery cell 4 is connected to form a whole through laser welding. The busbar 2 is connected to the positive electrode or the negative electrode of the battery cell 4, realizes series-parallel connection of the battery cells 4 through current, and externally supplies power. The busbar 2 can be of a sheet metal structure, two positioning holes are formed in the surface of the busbar 2, and the positioning holes can be used for positioning in welding with the poles of the battery cell 4.

The periphery of the busbar 2 may be provided with chamfers.

Specifically, the chamfer can prevent personnel from being scratched and local sharp current.

The collection piece 3 can be along the axis setting in the middle part of mica sheet, and busbar 2 is a plurality of, and the part that a plurality of busbars 2 are located collection piece 3 both sides on the mica sheet respectively sets up along being on a parallel with the axis of mica sheet side by side and forms two electrically conductive portions, and the quantity of busbar 2 in every electrically conductive portion is the same.

Specifically, the axis of the collecting element 3 may coincide with the axis of the mica sheet, and then the collecting element 3 is disposed at the center of the mica sheet, and then two symmetrical mounting areas are disposed on two sides of the collecting element 3 on the mica sheet, and a plurality of bus bars 2 are respectively mounted on the two mounting areas to form two conductive portions, the number of the bus bars 2 in each conductive portion is the same, the bus bars 2 in the two conductive portions are equidistantly disposed, the distance between two adjacent bus bars 2 in one conductive portion is equal to the distance between two adjacent bus bars 2 in the other conductive portion, and the bus bars 2 in one conductive portion and the bus bars 2 in the other conductive portion are alternately disposed along the direction from one end to the other end of the mica sheet.

The mica sheet may be a gold mica sheet and the busbar 2 an aluminum busbar.

The collecting member 3 may include a low voltage connector 32, a plurality of nickel plates 33, a circuit board 31 having a function of collecting the voltage and temperature of the current core 4, the low voltage connector 32 being connected to one end portion of the circuit board 31, one nickel plate 33 being connected to the middle portion of the circuit board 31 at one end and one bus bar 2 at the other end.

Specifically, the collection member may be an FPC integrated assembly. The low-voltage connector 32 realizes reliable installation of the circuit board 31, and can ensure accurate temperature and voltage data acquisition of the circuit board 31. The circuit board 31 may be an FPC flexible circuit board, and the FPC and the busbar 2 are soldered by the nickel plate 33. The collecting piece 3 can comprise a circuit board 31, a low-voltage connector 32 and a nickel sheet 33, and has the characteristics of light weight, small occupied space and high collecting precision.

Specifically, the circuit board 31 may be a printed circuit board, where the printed circuit board includes a board body, and a voltage acquisition line and a temperature acquisition line printed on the board body, both of which are printed on the board body, so that the circuit board has a function of acquiring voltage and temperature; the battery cell temperature sensor comprises a plate body, a plurality of voltage acquisition wires, a plurality of fuses, a plurality of external connecting wires, a clamping part arranged on the plate body and the voltage acquisition wires, a clamping groove arranged on the clamping part, a fuse detachably clamped in the clamping groove, a wiring dividing terminal arranged on the plate body, and a connecting part for connecting the printed fixing plate with the battery cell, wherein the fuses are arranged in a one-to-one correspondence manner through the clamping part and the voltage acquisition wires, the wiring dividing terminal is connected with the temperature acquisition wires, one end of the external connecting wire is connected with the thermistor, the other end of the external connecting wire is connected with the wiring dividing terminal, the thermistor is used for detecting the temperature of the battery cell, the connection of the thermistor and the temperature acquisition wires can be conveniently realized through the connection of the external connecting wire and the wiring dividing terminal, and the voltage acquisition wires are used for detecting the voltage of the battery cell; the temperature collection crimping terminal is connected with the total wiring terminal through the wire harness, the voltage collection crimping terminal is connected with the total wiring terminal through the wire harness, and the connection of each wire harness is realized through the mode of grafting.

Specifically, gather piece 3 also can include the FPC body, have elastic clamp piece, be used for gathering the voltage collection piece of electric core 4 voltage, be used for gathering the temperature sensor of electric core 4 temperature, the clamp piece includes the first end of being connected with insulating component 1 and be used for compressing tightly temperature sensor the second end on electric core 4, the FPC includes the FPC body and the buffer arm, the buffer arm has third end and fourth end, the third end passes through first connecting portion with the FPC body and is connected, first connecting portion 531 has elasticity, the one end of voltage collection piece is used for being connected with electric core 4, the other end is connected with the fourth end, the voltage collection piece can select the nickel piece 33 that is more common in the art for gathering the voltage of electric core 4 and with voltage data pass through the fourth end transmission of buffer arm and give the FPC body.

Specifically, the collecting member 3 may also include a low voltage connector 32, a plurality of nickel plates 33, an FPC flexible circuit board, a temperature sensor. The poles of the plurality of battery cells 4 are connected with the busbar 2 by welding to form a high-voltage loop. The electric core 4 stacks the setting, and the direction of stacking of electric core 4 can be left and right directions, also can be the direction that a plurality of electric cores 4 arranged in proper order, also can be the length direction of battery module curb plate, and busbar 2 can be along the direction of stacking of electric core 4 setting. In addition, when the nickel sheets 33 are arranged in the stacking direction of the cells 4, the overall arrangement of each nickel sheet 33 is arranged in the stacking direction of the cells 4, wherein the length direction of the nickel sheet 33 may be identical to the stacking direction of the cells 4, the width direction of the nickel sheet 33 may be identical to the stacking direction of the cells 4, or a part of the nickel sheet 33 may have its length direction identical to the stacking direction of the cells 4, and the other part of the nickel sheet 33 may have its width direction identical to the stacking direction of the cells 4. Part of the nickel plates 33 are welded with the busbar 2 of the battery module, and voltage signals are collected; the rest of the nickel plates 33 are adhered to each cell 4 through heat-conducting glue, and are connected with a temperature sensor, which can be a thermistor, through an FPC flexible circuit board, so as to collect the temperature of the cell 4.

The embodiment also provides a battery module, which comprises a plurality of electric cores 4 and the CCS component according to the scheme, wherein the CCS component is arranged on the electric cores 4, the number of the bus bars 2 is at least one, and two side ends of one bus bar 2 are respectively connected with the positive electrodes or the negative electrodes of the two electric cores 4.

The above description may be implemented alone or in various combinations and these modifications are within the scope of the present utility model.

It should be noted that, in the description of the present utility model, the terms "upper end," "lower end," and "bottom end" of the indicated orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in use of the product of the application, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Moreover, 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, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A CCS assembly for preventing thermal diffusion, disposed on top of a plurality of cells (4), characterized in that: comprises a heat insulation piece (1), a collecting piece (3) and at least one busbar (2), wherein the collecting piece (3) and the at least one busbar are respectively and integrally fixed on the heat insulation piece (1); the two side ends of one busbar (2) are respectively connected with the positive electrodes or the negative electrodes of two electric cores (4), and the acquisition piece (3) is used for acquiring the voltage and the temperature of a plurality of electric cores (4).

2. A CCS assembly for preventing thermal diffusion as defined in claim 1 wherein: the heat insulation piece (1) is provided with a marking part for marking the positive electrode and the negative electrode respectively.

3. A CCS assembly for preventing thermal diffusion as claimed in claim 1 or claim 2 wherein: the heat insulation piece (1) is a mica sheet.

4. A CCS assembly for preventing thermal diffusion as claimed in claim 3 wherein: and the busbar (2) and the collecting piece (3) are adhered to the mica sheet.

5. A CCS assembly for preventing thermal diffusion as claimed in claim 3 wherein: and the busbar (2) is provided with a positioning hole which can be welded with the pole of the battery cell (4).

6. A CCS assembly for preventing thermal diffusion as claimed in claim 3 wherein: chamfering is arranged around the busbar (2).

7. A CCS assembly for preventing thermal diffusion as claimed in claim 3 wherein: the collecting piece (3) is arranged in the middle of the mica sheet along the axis of the mica sheet, the number of the bus bars (2) is multiple, the bus bars (2) are respectively arranged on the mica sheet and positioned on two sides of the collecting piece (3) along the axis parallel to the mica sheet, two conductive parts are formed side by side, and the number of the bus bars (2) in each conductive part is the same.

8. A CCS assembly for preventing thermal diffusion as claimed in claim 3 wherein: the mica sheet is a gold mica sheet, and the busbar (2) is an aluminum busbar.

9. A CCS assembly for preventing thermal diffusion as claimed in claim 3 wherein: the collecting piece (3) comprises a low-voltage connector (32), a plurality of nickel sheets (33) and a circuit board (31) with the function of collecting the voltage and the temperature of the battery cell (4), wherein the low-voltage connector (32) is connected to one end part of the circuit board (31), one end of the nickel sheet (33) is connected to the middle part of the circuit board (31), and the other end of the nickel sheet is connected to one busbar (2).

10. A battery module, characterized in that: the battery pack comprises a plurality of battery cells (4) and the CCS assembly as claimed in any one of claims 1-9, wherein the CCS assembly is arranged on the battery cells (4), at least one bus bar (2) is arranged, and two side ends of one bus bar (2) are respectively connected with the positive electrodes or the negative electrodes of the two battery cells (4).