CN211208504U - Battery module - Google Patents

Abstract

The utility model provides a battery module, battery module includes: a housing having an accommodating chamber; the electric core assembly is arranged in the accommodating cavity and is provided with an exhaust cavity; the glue layer is filled in the accommodating cavity and is positioned between the shell and the electric core assembly; the exhaust passage runs through the glue layer, and the one end and the exhaust chamber intercommunication of exhaust passage, the other end and the outside intercommunication of casing of exhaust passage. Through the technical scheme that this application provided, can solve the problem that can't satisfy insulating demand and heat dissipation demand simultaneously among the prior art.

Description

Battery module

Technical Field

The utility model relates to a battery technology field particularly, relates to a battery module.

Background

Currently, electric vehicles include a battery box that provides power for the electric vehicle. In order to improve the insulating property and the heat dispersion of battery box, be provided with heat conduction silica gel pad in the battery box. Specifically, the battery box includes casing, electric core subassembly and heat conduction silica gel pad, and heat conduction silica gel pad sets up between the top surface of electric core subassembly and the inner wall of casing, utilizes heat conduction silica gel pad can carry out insulation treatment to electric core subassembly, and heat conduction silica gel pad can be with heat transfer to the casing that electric core subassembly produced to promote the heat dispersion of battery box.

In the prior art, if set up the heat conduction silica gel pad of individual layer, then there is the risk of electric leakage in the heat conduction silica gel pad, and the intensity of heat conduction silica gel pad is not enough, and the heat conduction silica gel pad takes place the damage easily when the car moves. If the multilayer heat-conducting silica gel pad is arranged, the contact thermal resistance of the device can be increased, and the heat dissipation requirement of the battery box cannot be met. Therefore, the problem that the insulation requirement and the heat dissipation requirement cannot be met simultaneously exists in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery module to solve the problem that can't satisfy insulating demand and heat dissipation demand simultaneously among the prior art.

The utility model provides a battery module, battery module includes: a housing having an accommodating chamber; the electric core assembly is arranged in the accommodating cavity and is provided with an exhaust cavity; the glue layer is filled in the accommodating cavity and is positioned between the shell and the electric core assembly; the exhaust passage runs through the glue layer, and the one end and the exhaust chamber intercommunication of exhaust passage, the other end and the outside intercommunication of casing of exhaust passage.

Further, the electric core assembly comprises: the battery cell unit is arranged in the accommodating cavity; and the signal acquisition board is arranged on the battery cell unit, and the exhaust cavity is positioned between the signal acquisition board and the battery cell unit.

Furthermore, the electric core assembly further comprises two conductive parts, the two conductive parts are arranged on the electric core unit at intervals, the signal acquisition board is positioned above the two conductive parts, one side of each conductive part is electrically connected with the electric core unit, the other side of each conductive part is electrically connected with the signal acquisition board, and the electric core unit, the signal acquisition board and the two conductive parts jointly form an exhaust cavity.

Furthermore, the conductive part comprises a parallel conductive part and a series conductive part which are mutually connected, one side of the parallel conductive part, which is far away from the series conductive part, is electrically connected with the battery cell unit, and one side of the series conductive part, which is far away from the parallel conductive part, is electrically connected with the signal acquisition board.

Further, the battery module further comprises a pressure release valve, the pressure release valve is arranged on the shell, and the exhaust passage is communicated with the pressure release valve.

Further, the battery module comprises a plurality of electric core assemblies, and the exhaust passages are respectively communicated with the plurality of exhaust cavities.

Further, the shell comprises an upper cover and a lower box body which are connected with each other, and a containing cavity is formed in a space between the upper cover and the lower box body.

Furthermore, the outer surface of the upper cover and/or the lower box body is provided with heat dissipation ribs.

Further, the glue layer is poured into the accommodating cavity through a glue pouring process.

Further, the glue layer comprises a polyurethane compound.

Use the technical scheme of the utility model, this battery module includes casing, electric core subassembly, glue film and exhaust passage. Wherein, the casing has and holds the chamber, and electric core subassembly sets up and is holding the intracavity, and the glue film is full of and holds the chamber, and the glue film is located between casing and the electric core subassembly, so can utilize the glue film to carry out insulation treatment to the electric core subassembly to satisfy battery module's insulating demand. And, because the glue film is full of and holds the chamber, can promote battery module's heat radiating area, the heat that the electric core subassembly produced can transmit to the casing through the glue film fast, can promote battery module's radiating efficiency to satisfy battery module's heat dissipation demand. And, the electric core subassembly has the exhaust chamber, runs through the glue film setting with exhaust passage, makes exhaust passage's one end and exhaust chamber intercommunication, makes exhaust passage's the other end and the outside intercommunication of casing, and the gaseous accessible exhaust chamber and the exhaust passage that the electric core subassembly during operation produced discharge, can promote battery module's security performance.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a cross-sectional view of a battery module provided by an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of a battery module provided by an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 11. an upper cover; 12. a lower box body;

20. an electrical core assembly; 21. an exhaust chamber; 22. a cell unit; 23. a signal acquisition board; 24. a conductive portion; 241. connecting conductive pieces in parallel; 242. serially connecting conductive pieces;

30. a glue layer; 40. a pressure relief valve; 50. and a charging terminal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the present invention provides a battery module including a case 10, a cell assembly 20, a gel layer 30, and an exhaust passage. Wherein, the casing 10 has the chamber of holding, sets up electric core subassembly 20 in holding the intracavity, can utilize casing 10 to protect electric core subassembly 20. Specifically, the glue film 30 is full of and holds the chamber, and glue film 30 is located between casing 10 and electric core subassembly 20, and glue film 30 can carry out insulation treatment to electric core subassembly 20, avoids taking place the problem of electric leakage, can satisfy battery module's insulating demand. And, because glue film 30 parcel is at electric core subassembly 20's surface, the heat accessible glue film 30 that electric core subassembly 20 during operation produced transmits to casing 10 fast to transmit to the external world through casing 10, thereby realize the heat dissipation cooling to battery module, can satisfy battery module's heat dissipation demand. In this embodiment, the cell assembly 20 has the exhaust cavity 21, the exhaust channel penetrates through the adhesive layer 30, one end of the exhaust channel is communicated with the exhaust cavity 21, the other end of the exhaust channel is communicated with the outside of the casing 10, and the gas generated by the cell assembly 20 during operation can be firstly exhausted into the exhaust cavity 21 and then exhausted to the outside through the exhaust channel, so as to avoid the gas from being greatly accumulated in the casing 10.

Use the battery module that this embodiment provided, because the glue film 30 is full of and holds the chamber, utilize glue film 30 can carry out insulation treatment to electric core subassembly 20, can satisfy battery module's insulating demand, because glue film 30 can promote battery module's heat radiating area, the heat that electric core subassembly 20 produced can transmit to casing 10 through glue film 30 fast, and transmit to the external world through casing 10, can promote battery module's radiating efficiency, satisfy battery module's heat dissipation demand. And, the gas generated when the cell assembly 20 operates can be discharged through the gas discharge cavity 21 and the gas discharge passage, so that the safety performance of the battery module can be improved.

In the present embodiment, the battery cell assembly 20 includes a battery cell unit 22 and a signal collecting board 23, and the signal collecting board 23 is connected to the battery cell unit 22. The battery cell unit 22 is disposed in the accommodating cavity, the signal collecting board 23 is disposed on the battery cell unit 22, and the signal collecting board 23 is utilized to collect the operating parameters of the battery cell unit 22. Specifically, the exhaust cavity 21 is located between the signal acquisition board 23 and the battery cell unit 22. In this embodiment, the signal collecting board 23 is disposed on the upper surface of the battery cell unit 22, and the signal collecting board 23 is spaced from the upper surface of the battery cell unit 22.

The cell assembly 20 further includes two conductive portions 24, the two conductive portions 24 are disposed on the cell unit 22 at intervals, the signal collecting board 23 is located above the two conductive portions 24, and the two conductive portions 24 can support and conduct electricity to the signal collecting board 23. Specifically, one side of the conductive part 24 is electrically connected to the battery cell unit 22, the other side of the conductive part 24 is electrically connected to the signal acquisition board 23, the battery cell unit 22, the signal acquisition board 23 and the two conductive parts 24 together enclose an exhaust cavity 21, and gas generated by the operation of the battery cell unit 22 can be exhausted into the exhaust channel through the exhaust cavity 21 and then exhausted out of the battery module through the exhaust channel.

Specifically, the conductive part 24 includes a parallel conductive part 241 and a series conductive part 242 connected to each other, and the cell unit 22, the parallel conductive part 241, the series conductive part 242, and the signal acquisition board 23 are connected in sequence from bottom to top. One side of the parallel conductive piece 241 far from the series conductive piece 242 is electrically connected to the battery cell unit 22, and one side of the series conductive piece 242 far from the parallel conductive piece 241 is electrically connected to the signal acquisition board 23. Specifically, the cell assembly 20 includes a plurality of cell units 22, the cell units 22 are connected in parallel through a parallel conductive member 241, a series conductive member 242 is installed on the parallel conductive member 241, and signal acquisition boards 23 are installed on the series conductive members 242 on the left and right electrodes. In this embodiment, the parallel conductor 241 and the series conductor 242 are both conductive aluminum rows. In other embodiments, the parallel conductive element 241 and the series conductive element 242 may be provided as conductive copper bars as long as the conductivity can be achieved.

In the present embodiment, the battery module further includes a pressure relief valve 40, the pressure relief valve 40 is provided on the housing 10, and the exhaust passage communicates with the pressure relief valve 40. When the battery cell unit 22 works, gas generated by the battery cell unit 22 is exhausted to the outside through the exhaust cavity 21, the exhaust channel and the pressure release valve 40 in sequence, so that the gas can be prevented from being accumulated inside the battery module, and the safety performance of the battery module can be improved. Specifically, after the pressure in the exhaust passage reaches a certain value, the relief valve 40 is opened to allow the gas to be discharged through the relief valve 40. And, the gas in the battery module can be discharged through the pressure release valve 40, but the external gas or other impurities cannot enter the battery module through the pressure release valve 40, so that the normal operation of the battery module can be ensured.

In the present embodiment, the battery module includes a plurality of cell assemblies 20, the exhaust passages are respectively communicated with a plurality of exhaust cavities 21, and gas generated by the operation of each cell assembly 20 can be exhausted through the exhaust passages. Specifically, the battery module includes three cell assemblies 20, and the exhaust cavity 21 of each cell assembly 20 is communicated with the exhaust passage.

Wherein, the housing 10 includes an upper cover 11 and a lower case 12 connected to each other, and a space between the upper cover 11 and the lower case 12 forms a receiving chamber. Specifically, the electric core assembly 20 is disposed in the lower case 12, and the pressure relief valve 40 is mounted on the lower case 12.

In order to further enhance the heat dissipation performance of the battery module, heat dissipation ribs may be provided on the outer surface of the upper cover 11 and/or the lower case 12. Specifically, heat dissipation ribs may be disposed on the outer surface of the upper cover 11, or on the outer surface of the lower case 12, or on the outer surfaces of the upper cover 11 and the lower case 12. Wherein, the heat dissipation rib includes the heat dissipation tooth, and the heat dissipation tooth extends towards the direction of keeping away from casing 10 surface.

In this embodiment, the glue layer 30 is filled into the accommodating cavity through a glue filling process, so that the processing is convenient, and the processing cost can be reduced. Specifically, a plurality of electric core assemblies 20 are arranged in the housing 10 at intervals, and the gaps between the plurality of electric core assemblies 20 and the gaps between the electric core assemblies 20 and the housing 10 are filled with adhesive layers 30.

Wherein the glue layer 30 comprises a polyurethane composite. Specifically, the polyurethane compound can be prepared by mixing two or more polyurethane compounds, is in a liquid state at normal temperature, and becomes a solid after being cured at normal temperature or high temperature.

Specifically, by providing the exhaust pipe member in the housing 10, the exhaust passage can be formed by the exhaust pipe member. In this embodiment, at first, set up the exhaust pipe inside the battery module, make the one end of exhaust pipe communicate with exhaust cavity 21, make the other end of exhaust pipe communicate with relief valve 40, after accomplishing to carry out the encapsulating to the battery module, the exhaust pipe can form the exhaust passage who reserves in casing 10.

In this embodiment, the case 10 is further provided with a charging terminal 50, the charging terminal 50 is mounted on the lower case 12, and the battery module can be charged by the charging terminal 50.

The device provided by the embodiment has the following beneficial effects:

(1) the glue is filled into the shell 10 of the battery module, the glue layer 30 can have an insulation effect by utilizing the insulation performance of the glue layer 30, and the glue layer 30 cannot lose activity or age after being used for a long time, so that the battery module has the advantage of long service life;

(2) the adhesive layer 30 can drive away the air in the shell 10, so that heat conduction is facilitated, the problem of increased contact thermal resistance caused by excessive layers of the heat-conducting silica gel pad can be solved by utilizing the heat-conducting property of the adhesive layer 30, and the heat-radiating efficiency of the battery module can be improved;

(3) the number of parts used by the battery module can be reduced, and the distance between the charged part of the device and the shell is reduced, so that the size of the device can be reduced, and meanwhile, good waterproof and dustproof effects can be achieved;

(4) because the glue layer 30 is filled in the shell 10 in a full encapsulating mode, the glue layer 30 can fix the parts in the shell 10 by utilizing the solidification fixing effect of the glue layer 30, the assembling procedures can be reduced, and the cost is reduced.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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, characterized in that the battery module comprises:

a housing (10) having a receiving cavity;

an electric core assembly (20) arranged in the accommodating cavity, wherein the electric core assembly (20) is provided with an exhaust cavity (21);

a glue layer (30) filling the accommodating cavity, wherein the glue layer (30) is positioned between the shell (10) and the electric core assembly (20);

the air exhaust channel penetrates through the rubber layer (30), one end of the air exhaust channel is communicated with the air exhaust cavity (21), and the other end of the air exhaust channel is communicated with the outer side of the shell (10).

2. The battery module according to claim 1, wherein the cell assembly (20) comprises:

a cell unit (22) disposed within the accommodation cavity;

the signal acquisition board (23) is arranged on the battery cell unit (22), and the exhaust cavity (21) is located between the signal acquisition board (23) and the battery cell unit (22).

3. The battery module according to claim 2, wherein the battery pack (20) further comprises two conductive parts (24), the two conductive parts (24) are arranged on the cell unit (22) at intervals, the signal collecting board (23) is located above the two conductive parts (24), one side of the conductive part (24) is electrically connected with the cell unit (22), the other side of the conductive part (24) is electrically connected with the signal collecting board (23), and the cell unit (22), the signal collecting board (23) and the two conductive parts (24) jointly enclose the air exhaust cavity (21).

4. The battery module according to claim 3, wherein the conductive part (24) comprises a parallel conductive piece (241) and a series conductive piece (242) connected to each other, wherein a side of the parallel conductive piece (241) away from the series conductive piece (242) is electrically connected to the cell unit (22), and a side of the series conductive piece (242) away from the parallel conductive piece (241) is electrically connected to the signal acquisition board (23).

5. The battery module according to claim 1, further comprising a pressure relief valve (40), the pressure relief valve (40) being provided on the housing (10), the vent passage being in communication with the pressure relief valve (40).

6. The battery module according to claim 1, comprising a plurality of said electric core assemblies (20), said air discharge channels being respectively in communication with a plurality of said air discharge cavities (21).

7. The battery module according to claim 1, wherein the housing (10) includes an upper cover (11) and a lower case (12) connected to each other, and a space between the upper cover (11) and the lower case (12) forms the receiving chamber.

8. The battery module according to claim 7, wherein the outer surface of the upper cover (11) and/or the lower case (12) is provided with heat dissipation ribs.

9. The battery module according to claim 1, wherein the glue layer (30) is poured into the receiving cavity by a glue pouring process.

10. The battery module according to claim 1, wherein the glue layer (30) comprises a polyurethane composite.

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