CN214378744U

CN214378744U - Battery module and electric automobile

Info

Publication number: CN214378744U
Application number: CN202120372098.9U
Authority: CN
Inventors: 汤超龙; 杰龙清; 许达理
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-10-08
Anticipated expiration: 2031-02-09

Abstract

The application relates to a battery module and an electric automobile. The battery module comprises an electric core group consisting of a plurality of electric cores and an electric connection area arranged on the electric core group; the electric connection region is provided with an electric connection structure, and the electric connection structure is used for electrically connecting a plurality of battery cells; the battery module is provided with a high-temperature-resistant isolation layer, and the high-temperature-resistant isolation layer is used for sealing and isolating the electric connection region and the electric connection structure. The application provides a scheme, can effectively promote battery module's security.

Description

Battery module and electric automobile

Technical Field

The application relates to the technical field of electric automobiles, in particular to a battery module and an electric automobile.

Background

The electric core is the minimum unit of power battery, also is electric energy storage unit, and when a plurality of electric cores were packaged together by same shell frame, when contacting through unified border and outside, this just constituted a battery module. The battery module is the power source of electric automobile, and the height of battery module security performance is crucial.

Among the correlation technique, there are more problems in the battery module in the in-service use process: firstly, the battery module can vibrate in the using process, and the shell and the wire harness isolation plate are easy to collide to generate abnormal sound; secondly, as the energy is released or absorbed in the use process of the battery cell, temperature difference is easily generated in the shell, condensation sometimes occurs in the shell, the insulating capability of the wire harness isolation plate is reduced, and the problem that chemical corrosion easily occurs to the battery cell pole and the busbar is also caused; when third, battery module thermal runaway, the jet-propelled thing of electricity core flows easily and scatters to other electricity cores on, leads to other electricity core short circuits, and then leads to other electricity cores to be heated for thermal runaway further worsens the diffusion.

Therefore, the protective function of the battery module in the related art is yet to be improved.

SUMMERY OF THE UTILITY MODEL

For solving or partly solving the problem that exists among the correlation technique, this application provides a battery module and electric automobile, and this battery module can have better safeguard function.

According to the utility model discloses an aspect provides a battery module, include: the battery pack comprises a battery core group consisting of a plurality of battery cells and an electric connection area arranged on the battery core group;

the electric connection region is provided with an electric connection structure, and the electric connection structure is used for electrically connecting a plurality of battery cells;

the battery module is provided with a high-temperature-resistant isolation layer, and the high-temperature-resistant isolation layer is used for sealing and isolating the electric connection region and the electric connection structure.

In one embodiment, the electrical connection area is fitted with a harness isolation plate;

the electric connection structure comprises a bus bar arranged on the wiring harness isolation plate, and the high-temperature-resistant isolation layer covers the wiring harness isolation plate and the bus bar in a sealing mode.

In one embodiment, the high temperature resistant insulation layer is a high temperature resistant insulating coating coated on the wire harness insulation board.

In one embodiment, a plurality of the busbars are arranged and mounted on the wire harness isolation plate, the high-temperature-resistant isolation layer is coated on the upper surfaces of the busbars and the wire harness isolation plate, and the busbars are respectively sealed and isolated by the high-temperature-resistant isolation layer.

In one embodiment, the wire harness insulation board has a gap thereon, and the high temperature resistant insulation layer is applied to the outer surface of the electric core pack located at the electric connection region through the gap.

In one embodiment, the high temperature resistant isolation layer is provided on a partial area or a whole area of the electric core assembly.

In one embodiment, the local area comprises the top, bottom or middle of the set of electric cores.

In one embodiment, the battery pack further comprises a housing for accommodating and fixing the battery pack, the top of the housing is provided with an opening, and the high temperature insulation layer is positioned in the opening.

In one embodiment, the casing comprises a bottom plate, an end plate and a side plate which are connected, the bottom plate, the end plate, the side plate and the high-temperature-resistant isolation layer together define a containing space, and the electric core group is located in the containing space.

According to the utility model discloses in the second aspect of the embodiment, provide an electric automobile, include as above the battery module.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the battery module comprises a battery core group consisting of a plurality of battery cells and an electric connection area arranged on the battery core group; the electric connection region is provided with an electric connection structure, and the electric connection structure is used for electrically connecting a plurality of battery cells; the battery module is provided with a high-temperature-resistant isolation layer, and the high-temperature-resistant isolation layer is used for sealing and isolating the electric connection region and the electric connection structure. After setting up like this, the high temperature resistant isolation layer is sealed the isolation with the electric connection region on the electric core group and the electric connection structure in the electric connection district, has avoided the electric connection region on the electric core group and the electric connection structure in the electric connection district to be polluted by steam or impurity in the air, and then has avoided electric core group and electric connection structure to wet and take place the short circuit, can effectively promote battery module's security makes battery module can have better safeguard function.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a schematic view of the overall structure of a battery module according to an embodiment of the present application;

fig. 2 is a schematic view illustrating the matching of the high temperature resistant isolation layer of the battery module and the housing according to the embodiment of the present disclosure;

fig. 3 is an exploded view of a battery module according to an embodiment of the present application.

Reference numerals:

10-cell module

100-electric core group

200-high temperature resistant barrier layer

300-harness isolation board

310 bus bar

400-shell

410-base plate

420-end plate

430-side plate

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the related art, there are many problems in the actual use process of the battery module, for example: the abnormal noise problem, the problem of the reduction of the insulation ability, and the problem that the thermal diffusion is difficult to control after the thermal runaway, so that the protection function is desired to be improved. The application provides a battery module, this battery module has better security and stability, can have better safeguard function.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to fig. 3, a battery module 10 according to an embodiment of the present disclosure includes: the battery pack 100 consists of a plurality of battery cells and an electric connection area arranged on the battery pack 100; the electric connection area is provided with an electric connection structure which is used for electrically connecting the plurality of electric cores; the battery module 10 is provided with a high temperature isolation layer 200, and the high temperature isolation layer 200 is used for sealing and isolating the electrical connection region and the electrical connection structure. After setting up like this, high temperature resistant isolation layer 200 is sealed the isolation with the electric connection region on electric core group 100 and the electric connection structure in the electric connection region, has avoided the electric connection region on electric core group 100 and the electric connection structure in the electric connection region to be polluted by steam or impurity in the air, and then has avoided electric core group 100 and electric connection structure to wet and take place the short circuit, can effectively promote battery module 10's security.

In one implementation, the electrical connection area is mounted with a harness isolation plate 300; the electrical connection structure includes a bus bar 310 mounted on the wire harness isolation plate 300, and the high temperature resistant isolation layer 200 is hermetically covered on the wire harness isolation plate 300 and the bus bar 310. The wire harness isolation plate 300 connects the electric core packs 100 so that the electric core packs 100 establish a series or parallel circuit system, and the bus bar 310 is used to connect the electric core packs 100. After setting up like this, high temperature resistant isolation layer 200 seals up pencil division board 300 and busbar 310, has avoided pencil division board 300 and busbar 310 to be polluted by the steam or the impurity in the air, and then has avoided electric core group 100 and electric connection structure to take place the short circuit, can effectively promote battery module 10's security.

In the present embodiment, the high temperature resistant insulation layer 200 is a high temperature resistant insulating coating applied on the wire harness insulation panel 300. The high-temperature-resistant isolation layer 200 can separate the wiring harness isolation plate 300 from air, so that after the arrangement, the wiring harness isolation plate 300 is prevented from being polluted by water vapor or impurities in the air, further, an electric connection structure on the wiring harness isolation plate 300 is prevented from being short-circuited, and the safety of the battery module 10 can be effectively improved; meanwhile, the reduction of the conductivity due to chemical corrosion of the electrical connection structure on the wire harness isolation plate 300 can be avoided. Further, by installing the bus bar 310 on the wire harness isolation plate 300, when the high temperature resistant isolation layer 200 is coated on the wire harness isolation plate 300, the bus bar 310 can be coated at the same time, so that the coating process of the high temperature resistant coating is effectively saved, and the using amount of the high temperature resistant coating material is also saved.

Further, a plurality of busbars 310 are arranged on the wire harness isolation plate 300, the high temperature resistant isolation layer 200 is coated on the upper surfaces of the busbars 310 and the wire harness isolation plate 300, and the busbars 310 are respectively sealed and isolated by the high temperature resistant isolation layer 200. After setting up like this, when a electricity core takes place thermal runaway, its injection thing can pass and coat in the high temperature resistant isolation layer 200 who is connected the busbar 310 top with this electricity core to drop on the high temperature resistant isolation layer 200 in top of adjacent electricity core, and on other busbars 310 of indirect dropping, prevented other electric core short circuits and the injury of high temperature, greatly delayed electric core thermal diffusion's heat transfer and electrical pollution.

Further, the wire harness insulation plate 300 has a gap thereon, and the high temperature-resistant insulation layer 200 is applied to a partial outer surface of the electric core pack 100 at the electric connection region through the gap. Through coating the high temperature resistant coating on pencil division board 300, the high temperature resistant coating can permeate into in the clearance on pencil division board 300, can play fine sealed isolation to the cylinder manifold on pencil division board 300 on the one hand, and on the other hand, the high temperature resistant coating can permeate and coat in the surface of electric core group 100 in the clearance of pencil division board 300 from the pencil division board, plays the effect of protection isolation to electric core group 100.

In one implementation, the refractory insulation layer 200 is provided on a partial area or a whole area of the electric core pack 100. The high-temperature resistant separation layer 200 may be coated on the electrical connection region of the electric core pack 100 or completely coated and wrapped around the electric core pack 100, so that the electrical connection region of the electric core pack 100 or the entire electric core pack 100 is isolated from the air, thereby allowing the battery module 10 to have better insulation performance; by utilizing the characteristic of bonding and fixing of the high-temperature-resistant isolation layer 200, the high-temperature-resistant isolation layer 200 can fix the electric connection structure, so that the electric connection structure is prevented from vibrating and colliding with other adjacent components to generate noise; by utilizing the buffering capacity of the high-temperature-resistant isolation layer 200, the thermal expansion phenomenon of the battery core can be well relieved, and the safety of the battery module 10 is improved.

In the present embodiment, the partial region of the electric core pack 100 includes the top, bottom or middle portion of the electric core pack 100. That is to say, high temperature resistant isolation layer 200 both can coat in the top of electric core group 100, also can coat in the side and the bottom of electric core group 100, carries out the omnidirectional through the electric connection structure to electric core group 100 and keeps apart the protection, can make electric core group 100 have better security performance.

In one implementation, the battery module 10 further includes a case 400 for receiving and fixing the electric core pack 100, the case 400 having an opening at the top thereof, and the high temperature-resistant separation layer 200 being located at the opening. The casing 400 plays the effect of protection to electric core group 100, and high temperature resistant isolation layer 200 is sealed to be set up in the opening, because high temperature resistant isolation layer 200 has sealed bonding effect, therefore can replace installing the upper cover of casing 400 above pencil division board 300 among the correlation technique, and then solved the problem that the vibration collision produced the noise between the upper cover of pencil division board 300 and casing 400.

In this embodiment, the housing 400 includes a bottom plate 410, an end plate 420 and a side plate 430 connected to each other, the bottom plate 410, the end plate 420, the side plate 430 and the high temperature-resistant isolation layer 200 together define a receiving space, and the electric core pack 100 is located in the receiving space. End plate 420 and curb plate 430 set up respectively in the both ends and the both sides of electric core group 100, bottom plate 410 sets up in the bottom of electric core group 100, end plate 420 and curb plate 430 are used for encircleing the side wall of electric core group 100, bottom plate 410 is used for bearing electric core group 100, connect end plate 420 and curb plate 430 through high temperature resistant isolation layer 200, high temperature resistant isolation layer 200 keeps apart the top and the exterior space of electric core group 100, effectively promoted electric core group 100, the busbar 310 of electric core group 100 top and the insulating properties of pencil division board 300.

Further, the electric core pack 100 is connected to the end plates 420 and the side plates 430 by structural adhesives, respectively. The structural adhesive has high strength, can bear larger load, is aging-resistant, fatigue-resistant and corrosion-resistant, has stable performance in the expected life, and is suitable for bearing strong structural member adhesion. The end plates 420 and the side plates 430 clamp and fix the electric core pack 100 by structural adhesive, so that the battery module 10 is stable and compact.

In one embodiment, the high temperature isolation layer 200 may be a structure formed of a foamed plastic material. The foaming adhesive is a single-component, moisture-cured and multipurpose polyurethane foaming filling elastic sealing material, can form foam after curing, and can absorb partial energy, so that adverse consequences caused by thermal expansion of the battery cells can be well relieved, air in the foam can play a good heat insulation effect, and the heat diffusion speed among the battery cells can be greatly delayed.

In summary, the battery module of the present application has the following advantages compared with the related art:

1) the high temperature resistant isolation layer can make electric core group and with electric connection structure sealed fixed that electric core group electricity is connected, electric core group and electric connection structure be difficult for because of the vibration collision each other, reliability and stability are high.

2) High temperature resistant isolation layer is with electric core group and electric connection structure and air isolation, has avoided electric core group and electric connection structure to be contaminated by steam or impurity in the air, and then has avoided electric core group and electric connection structure to wet and take place the short circuit, can effectively promote battery module's security.

3) When one or partial electric core takes place the thermal runaway, the jet that its produced passes behind the high temperature resistant isolation layer to directly on dropping rather than adjacent electric core, the high temperature resistant isolation layer can be separated the jet with other electric cores, has protected other electric cores, has greatly delayed the thermal diffusion of electric core, has further promoted the security performance of battery module.

The battery module that this application provided has been introduced above, and correspondingly, this application still provides an electric automobile, includes the battery module in the above-mentioned embodiment.

The electric vehicle provided by the embodiment has a battery module 10, wherein the battery module 10 includes a battery core pack 100 composed of a plurality of battery cells, and an electrical connection area arranged on the battery core pack 100; the electric connection area is provided with an electric connection structure which is used for electrically connecting the plurality of electric cores; the battery module 10 is provided with a high temperature isolation layer 200, and the high temperature isolation layer 200 is used for sealing and isolating the electrical connection region and the electrical connection structure. After the arrangement, the electric automobile has better safety performance.

Other embodiments of the present application further include a mounting structure that can be implemented by combining technical features in the above embodiments.

The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A battery module, comprising:

the battery pack comprises a battery core group consisting of a plurality of battery cells and an electric connection area arranged on the battery core group;

2. The battery module according to claim 1, wherein:

the electric connection area is provided with a wiring harness isolation plate;

3. The battery module according to claim 2, wherein:

the high-temperature-resistant isolation layer is a high-temperature-resistant insulating coating coated on the wire harness isolation plate.

4. The battery module according to claim 3, wherein:

the wiring harness isolation plate is provided with a plurality of bus bars in an arrayed manner, the high-temperature-resistant isolation layer is coated on the upper surface of the plurality of bus bars and the wiring harness isolation plate, and the plurality of bus bars are respectively sealed and isolated by the high-temperature-resistant isolation layer.

5. The battery module according to claim 4, wherein:

the wire harness isolation plate is provided with a gap, and the high-temperature-resistant isolation layer is coated on the outer surface of the electric core group in the electric connection area through the gap.

6. The battery module according to claim 1, wherein:

the high-temperature-resistant isolation layer is arranged in a partial area or a whole area on the electric core group.

7. The battery module according to claim 6, wherein:

the local area comprises the top, the bottom or the middle part of the electric core group.

8. The battery module according to claim 1, wherein:

the high-temperature-resistant insulating layer is characterized by further comprising a shell for accommodating and fixing the electric core group, wherein the top of the shell is provided with an opening, and the high-temperature-resistant insulating layer is positioned in the opening.

9. The battery module according to claim 8, wherein:

the shell comprises a bottom plate, an end plate and a side plate which are connected,

the bottom plate, the end plate, the curb plate reaches the high temperature resistant isolation layer prescribes a limit to accommodating space jointly, the electric core group is located in accommodating space.

10. An electric vehicle characterized by comprising the battery module according to any one of claims 1 to 9.