CN212161937U

CN212161937U - Battery pack and vehicle

Info

Publication number: CN212161937U
Application number: CN202021170912.0U
Authority: CN
Inventors: 王志强; 徐鹏; 刘安龙
Original assignee: Guangzhou Chengxingzhidong Automotive Technology Co., Ltd
Current assignee: Guangzhou Chengxingzhidong Automotive Technology Co., Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-12-15
Anticipated expiration: 2030-06-22

Abstract

The application discloses battery package and vehicle. The battery pack includes: the shell comprises a bottom shell and an upper cover connected with the bottom shell, and an accommodating space is defined by the bottom shell and the upper cover; the battery cell is arranged in the accommodating space; and the humidity adjusting module is positioned in the accommodating space and arranged on the upper cover, and the humidity adjusting module is used for absorbing water vapor in the accommodating space or releasing water vapor so as to adjust the humidity of the accommodating space. So, the humidity of accommodation space can be adjusted to the humidifying module, avoids the humidity in the accommodation space too big and at the inside condensed water that forms of battery package, prevents that battery package from appearing bad phenomena such as short circuit owing to the inside condensed water that forms, has guaranteed the security of battery package.

Description

Battery pack and vehicle

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack and a vehicle.

Background

In an electric vehicle, a battery pack is generally used to provide power for the electric vehicle. When the environmental humidity is higher and the temperature difference between the inside and the outside of the battery pack is larger, condensed water is easily formed in the battery pack, and the condensed water easily causes the battery pack to have bad phenomena such as short circuit and the like, so that the safety of the battery pack is damaged.

Disclosure of Invention

The application provides a battery pack and a vehicle.

The battery pack of the embodiment of the present application includes:

the shell comprises a bottom shell and an upper cover connected with the bottom shell, and an accommodating space is defined by the bottom shell and the upper cover;

the battery cell is arranged in the accommodating space; and

the humidity adjusting module is positioned in the accommodating space and arranged on the upper cover, and the humidity adjusting module is used for absorbing water vapor in the accommodating space or releasing water vapor to adjust the humidity of the accommodating space.

In some embodiments, the humidity control module comprises a protective frame and a humidity control material disposed in the protective frame, the protective frame has a through hole, and the humidity control material is used for absorbing water vapor in the accommodating space or releasing water vapor through the through hole.

In some embodiments, the protection frame includes a first frame body and a second frame body connected to the first frame body, the first frame body and the second frame body enclose an installation space, the humidity control material is disposed in the installation space, and the first frame body is formed with the through hole.

In some embodiments, the first frame body is formed with a groove, the second frame body covers the groove and forms the installation space with the groove, and the groove communicates with the through hole.

In some embodiments, the humidity control module is attached to the upper cover through the second frame.

In some embodiments, the second frame body includes a body and a connecting piece extending from an edge of the body, the connecting piece being fixed to the upper cover by a fastener.

In certain embodiments, the conditioning material is rectangular in cross-section.

In some embodiments, the number of the humidity control modules is plural, and the plural humidity control modules are provided at intervals.

In some embodiments, the bottom case is provided with an air hole communicated with the accommodating space, and the battery pack includes an air ventilation device provided at the air hole.

The vehicle of the embodiment of the present application includes a vehicle body and the battery pack of any one of the above embodiments, the battery pack being provided at the vehicle body.

Among above-mentioned battery package and the vehicle, the humidity of accommodation space can be adjusted to the humidifying module, avoids the humidity in the accommodation space too big and at the inside condensed water that forms of battery package, prevents that the battery package from appearing bad phenomena such as short circuit owing to the inside condensed water that forms, has guaranteed the security of battery package.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic plan view of a battery pack according to an embodiment of the present application;

fig. 2 is a schematic plan view of a bottom case of a battery pack according to an embodiment of the present application;

fig. 3 is a schematic plan view of an upper cover of a battery pack according to an embodiment of the present application;

fig. 4 is an exploded schematic view of a humidity control module of a battery pack according to an embodiment of the present invention;

fig. 5 is an exploded view of a protection frame of a battery pack according to an embodiment of the present application;

fig. 6 is a perspective view of a first frame of the battery pack according to the embodiment of the present application;

fig. 7 is a schematic plan view of a humidity control module of a battery pack according to an embodiment of the present application;

fig. 8 is another schematic plan view of the humidity control module of the battery pack according to the embodiment of the present application;

fig. 9 is a schematic plan view of a vehicle according to an embodiment of the present application.

The main characteristic reference numbers:

the air-permeable cover comprises a shell 10, an upper cover 11, a bottom shell 12, an accommodating space 121, an air hole 122 and an air permeable device 13;

the humidity control module 20, the protective frame 21, the first frame 211, the fixing buckle 2111, the groove 2112, the second frame 212, the body 2121, the connecting piece 2122, the through hole 213, the mounting space 214, and the humidity control material 22;

a battery cell 30;

vehicle 1000, body 200.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

It should be noted that, in the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; 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.

Referring to fig. 1 to 3, a battery pack 100 according to an embodiment of the present disclosure includes a housing 10, a humidity conditioning module 20, and a battery cell 30. The humidity control module 20 and the battery cell 30 are both disposed in the housing 10. Humidifying module 20 sets up with electric core 30 interval. Of course, the humidity control module 20 may also be disposed on the battery cell 30.

Specifically, the housing 10 is a carrier of a power battery of the vehicle 1000, the housing 10 is a vertical combination structure, and the housing 10 is a rectangular shape as a whole. In some embodiments, the material of the housing 10 may be a steel shell, an aluminum alloy shell, a sheet molding compound composite material, a carbon fiber reinforced composite material, or the like.

In one embodiment, the housing 10 is formed from a sheet molding compound composite by a molding process. Thus, the shell 10 has light weight, high strength, good fatigue resistance, good electrical performance and low thermal conductivity, so that the shell 10 still has a good protection effect under a long-term high-temperature condition.

It can be understood that the casing 10 is used for protecting the internal battery and the humidity conditioning module 20, the battery core 30 and other structures from being damaged when being collided and extruded by the outside. Therefore, the material of the housing 10 is not limited herein, and the hardness and the anti-extrusion capability of the material of the housing 10 can meet the required standards.

The housing 10 includes an upper cover 11 and a bottom shell 12, which are opposite to each other, and the upper cover 11 and the bottom shell 12 may be fixedly connected by means of a tenon, a thread connection, a welding, an adhesive, a hinge, or a lock, and the specific connection manner is not limited herein.

Referring to fig. 2-3, the upper cover 11 and the bottom case 12 are rectangular, and the upper cover 11 and the bottom case 12 define an accommodating space 121. The accommodating space 121 is used for accommodating the humidity control module 20, the battery cell 30 and other components (e.g., a circuit board, etc.) of the battery pack 100.

The upper cover 11 can be connected with a cooling pipe, and the cooling pipe can cool the battery pack 100 through the upper cover 11 to reduce the temperature of the battery pack 100. Therefore, when the cooling pipe cools, due to the low temperature of the upper cover 11, the water vapor in the air is easy to form condensed water after encountering the upper cover 11. In addition, in order to improve the strength of the upper cover 11, the upper cover 11 may be made of a metal material, which also makes it easy for the upper cover 11 to form condensed water.

The side surface of the bottom case 12 is provided with an air hole 122, and the air hole 122 is communicated with the accommodating space 121. The ventilation holes 122 may be provided with ventilation devices 13, and the ventilation devices 13 exchange air inside and outside the housing 10 through the ventilation holes 122 to achieve ventilation. In some embodiments, the ventilation device 13 may be a small ventilation fan, an air exchanger, an air suction and exhaust device, or other air exchange device. In other embodiments, the venting means 13 may employ a waterproof, vented membrane to seal the vent 122. In this way, the ventilation device 13 may partially regulate the temperature and humidity in the battery pack 100.

Referring to fig. 4 and 5, in the embodiment of the application, the humidity control module 20 is located in the accommodating space 121 and disposed on the upper cover 11, and the humidity control module 20 is configured to absorb water vapor in the accommodating space 121 or release water vapor to control the humidity of the accommodating space 121.

Thus, the humidity control module 20 can adjust the humidity of the accommodating space 121, prevent the excessive humidity in the accommodating space 121 from forming condensed water inside the battery pack 100, prevent the undesirable phenomena such as short circuit of the battery pack 100 due to the condensed water formed inside the battery pack 100, and ensure the safety of the battery pack 100.

It can be understood that after the humidity adjustment module 20 absorbs the water vapor in the accommodating space 121, the humidity in the accommodating space 121 decreases; similarly, after the humidity control module 20 releases water vapor into the accommodating space 121, the humidity in the accommodating space 121 rises.

The humidity control module 20 includes a protection frame 21 and a humidity control material 22. The humidity control material 22 is provided in the protective frame 21. The humidity control module 20 can adjust the humidity of the accommodating space 121 to prevent condensed water from forming inside the battery pack 100 due to an excessive humidity in the accommodating space 121, thereby preventing the condensed water from dripping or flowing from the upper cover 11 to other positions of the battery pack 100.

Specifically, when the battery pack 100 is in a high-temperature and high-humidity environment, the temperature difference between the inside and the outside of the battery pack 100 is large, and the external wet air can enter the inside of the battery pack 100 at a certain rate. In a high-temperature environment, when the cooling function of the battery pack 100 is started, water vapor on the outer wall of the water pipe and the surface of the cooling plate is easy to form condensed water, so that the short circuit risk of the battery pack 100 is caused.

Therefore, when the humidity is high, the amount of water vapor in the battery pack 100 increases, and the humidity control material 22 in the humidity control module 20 can adsorb water vapor inside the battery pack 100, thereby reducing the humidity inside the battery pack 100 and making it impossible to satisfy the condition for forming condensed water. When the humidity is low, the humidity control material 22 in the humidity control module 20 can release the moisture stored in the humidity control material in the form of vapor, so as to increase the humidity inside the battery pack 100, and make the inside of the battery pack 100 reach an appropriate humidity.

In the embodiment of the present application, the humidity control material 22 may be a material capable of absorbing moisture in the air and releasing moisture into the air, such as a bio-fiber and/or an inorganic salt. The biological fiber is natural or artificial filament material, such as cotton, wool, hemp, silk, bamboo pulp, hemp pulp fiber, protein fiber, alginate fiber, chitin fiber, cellulose fiber by direct solvent method, etc. Inorganic salts are salts of inorganic compounds, for example, desiccant materials such as calcium chloride, calcium sulfate, alumina, and magnesium sulfate. It is to be understood that in other embodiments, the humidity control material 22 may be made of nylon with high moisture absorption and desorption properties, diatomite with high moisture absorption and desorption properties, silica gel plate, or the like, which can absorb and desorb moisture.

Referring to fig. 4, in the embodiment of the present application, the protective frame 21 has a through hole 213, and the humidity control module 20 absorbs water vapor in the accommodating space 121 or releases water vapor through the through hole 213, so as to change the amount of water vapor in the air, and further change the humidity inside the battery pack 100.

The protection frame 21 includes a first frame body 211 and a second frame body 212. The second frame body 212 is connected to the first frame body 211. The protective frame 21 is used to mount the humidity control material 22 and also to protect the humidity control material 22 from being damaged by collision with other parts or devices.

Specifically, the first frame body 211 and the second frame body 212 enclose an installation space 214, the humidity control material 22 is disposed in the installation space 214, and the first frame body 211 is formed with a through hole 213. The installation space 214 is used for installing the humidity conditioning material 22. The through hole 213 is used to communicate the mounting space 214 with the outside air. In the present embodiment, the humidity control material 22 is provided in the installation space 214, and the humidity control material 22 absorbs or releases water vapor in the housing space 121 through the through holes 213.

The first frame 211 is formed with a groove 2112, a fixing catch 2111, and a through hole 213. Specifically, referring to fig. 6, the fixing buckle 2111 is disposed on a side of the first frame 211 opposite to the groove 2112, and in some embodiments, the humidity conditioning module 20 can be fixedly connected to the upper cover 11 by the fixing buckle 2111.

The groove 2112 communicates with the through hole 213. Referring to fig. 4 and 8, in the embodiment of the present invention, when the second frame 212 is fixedly connected to the first frame 211, the body 2121 of the second frame 212 covers the groove 2112 of the first frame 211 and forms an installation space 214 with the groove 2112. The installation space 214 is used for installing the humidity conditioning material 22.

In this way, the humidity control material 22 can communicate with the outside of the protective frame 21 through the notch 2112 and the through hole 213, and the humidity control material 22 can absorb/desorb moisture.

Referring to fig. 6, in the present embodiment, the through holes 213 are rectangular holes, and the through holes 213 are arranged at intervals to make the first frame 211 in a grid shape.

The through-holes 213 can increase the contact area of the humidity conditioning material 22 with air, increasing the moisture absorbing/releasing ability. It is understood that in some embodiments, the through holes 213 may be configured as round holes, square holes, stripe holes, etc. The size of the through-hole 213 should not be too large or too small, and when the size of the through-hole 213 is too large, there is a risk that the humidity control material 22 may leak or be damaged from the through-hole 213. If the size of the through-hole 213 is too small, the area of the humidity control material 22 in contact with the outside air of the protective frame 21 becomes too small, and the humidity control ability of the humidity control material 22 is lowered.

In some embodiments, the humidity control material 22 may be used as it is to perform humidity control of the battery pack 100 without providing the protection frame 21. For example, the humidity control material 22 may be directly attached to the edge or the center of the upper cover 11 of the battery pack 100; alternatively, the humidity control material 22 may be processed into a cube and attached to the upper cover of the battery pack 100, so that the humidity control material 22 is prevented from being contaminated or damaged as much as possible.

It should be noted that in the description of the present application, it is to be understood that the terms "thickness", "upper", "lower", "inner" and "outer" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Referring to fig. 7, in the present embodiment, the second frame 212 may be a smooth surface for adhering the humidity controlling material 22. The humidity control module 20 is attached to the upper cover 11 via the second housing 212. Specifically, the second frame body 212 can be fixed to the upper cover 11 by bonding, and the first frame body 211 and the humidity control material 22 connected to the second frame body 212 are fixed to the upper cover 11, thereby fixing the humidity control module 20. The bonding process may use adhesives such as acrylic type adhesives, industrial glues, double sided tapes, epoxy glues, and the like. In one example, the double-sided adhesive tape is firstly adhered to the second frame body 212, and then the humidity control module 20 is adhered to the upper cover 11 through the double-sided adhesive tape, so that the adhesion degree of the humidity control module 20 is ensured, and the complexity of the adhesion process is reduced.

In another embodiment, the humidity control module 20 may be fixed to the upper cover 11 by a structure such as a snap, a buckle, or a bolt. For example, a plurality of locking grooves are provided in the upper cover 11, and the locking grooves are engaged with the fixing clips 2111 to fix the humidity control module 20 to the upper cover 11.

In some embodiments, the humidity conditioning module 20 may not be fixed to the upper cover 11. The humidity control module 20 may be fixed to the inside of the battery pack 100 by other means such as natural suspension.

The second frame 212 is fixedly connected to the first frame 211, and the second frame 212 includes a body 2121 and a connecting piece 2122. A connecting tab 2122 extends outwardly from the body 2121. In some embodiments, the attachment piece 2122 can be fixed to the upper cover 11 by a fastener, so that the humidity conditioning module 20 is fixed to the upper cover 11. In this way, the humidity control module 20 is more firmly fixed to the upper cover 11 after being fixed by the fastening member, and the humidity control module 20 is prevented from being collided and displaced. In one example, the fastening members are screws, screw holes are formed in the upper cover 11 at positions corresponding to the humidity control module 20, and the humidity control module 20 is mounted on the upper cover 11 by the screws, the screw holes, and the bolts, thereby increasing the stability of the humidity control module 20.

In the present embodiment, the cross section of the humidity control material 22 is rectangular. The conditioning material 22 is designed in a rectangular shape with two dimensions, 16 × 5 × 0.3(cm) and 8 × 10 × 0.3(cm), depending on the arrangement of the battery pack 100 system.

It is understood that in other embodiments, the thickness and size of the humidity conditioning material 22 may be tailored to the actual arrangement of the battery packs 100, such as larger sizes 20 x 10 x 0.3(cm), 20 x 0.3(cm), or smaller sizes 8 x 5 x 0.3(cm), 8 x 3 x 0.2(cm), etc. The cross-section of the humidity controlling material 22 may be triangular or circular.

In the present embodiment, the amount of the humidity control material 22 used may be calculated from the net volume of the battery pack 100. The formula of the amount of the humidity control material 22 adopts M ═ n × V, where n is a coefficient, n is determined by the humidity control capacity per unit volume of the corresponding humidity control material 22, and V is the net volume (cm) of the battery pack 100³) M is the amount (cm)³)。

Referring to fig. 3, in the present embodiment, the number of the humidity control modules 20 is plural, and may be 5, 7, 9, etc., and the plural humidity control modules 20 are provided on the upper cover 11 at intervals. It is understood that in other embodiments, the number of humidity conditioning modules 20 can be fewer or one. The humidity control module 20 is attached to a region of the upper cover 11 corresponding to a position where condensation is likely to occur inside the battery pack 100.

Next, the operation principle of the battery pack 100 according to the present embodiment will be described.

When the battery pack 100 is in a high-temperature and high-humidity environment, the humidity control material 22 can adsorb water vapor inside the battery pack 100, and reduce the humidity inside the battery pack 100 so that the condition for forming condensed water is not satisfied. When the battery pack 100 is separated from a high-temperature and high-humidity environment, the humidity control material 22 can release the stored moisture in the battery pack 100 as vapor according to the actual humidity inside the battery pack 100, thereby increasing the humidity inside the battery pack 100 and recovering the moisture absorption capacity of the humidity control material 22.

The vehicle 1000 of the embodiment of the application comprises a vehicle body 200 and the battery pack 100, wherein the battery pack 100 is arranged in the vehicle body 200, and the humidity control module 20 improves the safety and the service life of the battery pack 100 and is beneficial to enhancing the user experience.

In summary, in one embodiment of the present application, the battery pack 100 includes a casing 10, a battery cell 30, and a humidity control module 20. The housing 10 includes a bottom case 12 and an upper cover 11, and the bottom case 12 and the upper cover 11 define an accommodating space 121. The battery cell 30 is disposed in the accommodating space 121. The humidity control module 20 is located in the accommodating space 121 and is disposed on the upper cover 11. The humidity control module 20 is used for adjusting the humidity of the accommodating space 121 by absorbing the water vapor in the accommodating space 121 or releasing the water vapor, so that the phenomenon that condensed water is formed inside the battery pack 100 due to the excessively high humidity in the accommodating space 121 is avoided, the battery pack 100 is prevented from being short-circuited due to the condensed water formed inside the battery pack 100, and the safety of the battery pack 100 is ensured.

In the description of the present specification, reference to the description of the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and variations may be made therein by those of ordinary skill in the art without departing from the scope of the present invention, which is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising:

the battery cell is arranged in the accommodating space; and

the humidity adjusting module is positioned in the accommodating space and arranged on the upper cover, and is used for adjusting the humidity of the accommodating space by absorbing water vapor in the accommodating space or releasing the water vapor.

2. The battery pack according to claim 1, wherein the humidity control module comprises a protective frame and a humidity control material arranged in the protective frame, the protective frame is provided with a through hole, and the humidity control material is used for absorbing water vapor in the accommodating space or releasing water vapor through the through hole.

3. The battery pack according to claim 2, wherein the protective frame includes a first frame body and a second frame body connected to the first frame body, the first frame body and the second frame body enclose an installation space, the humidity control material is provided in the installation space, and the first frame body is formed with the through hole.

4. The battery pack according to claim 3, wherein the first frame body is formed with a groove, the second frame body covers the groove and forms the mounting space with the groove, and the groove communicates with the through hole.

5. The battery pack according to claim 3, wherein the humidity control module is attached to the upper cover through the second frame body.

6. The battery pack according to claim 3, wherein the second frame body includes a body and a connecting piece extending from an edge of the body, the connecting piece being fixed to the upper cover by a fastener.

7. The battery pack according to claim 2, wherein the humidity control material has a rectangular cross section.

8. The battery pack according to claim 1, wherein the humidity control module includes a plurality of humidity control modules, and the plurality of humidity control modules are provided at intervals.

9. The battery pack according to claim 1, wherein the bottom case is provided with ventilation holes communicating with the accommodating space, and the battery pack includes a ventilation device provided at the ventilation holes.

10. A vehicle, characterized by comprising:

a vehicle body;

the battery pack of any one of claims 1-9, wherein the battery pack is disposed on the vehicle body.