Battery pack tray, battery pack and electric equipment

Abstract

The utility model discloses a battery pack tray, a battery pack and electric equipment. The battery pack tray comprises a tray body and a covering film, the tray body comprises an edge beam and a bottom plate which are connected with each other, a smoke exhaust channel is formed in the edge beam, or smoke exhaust channels are formed in the edge beam and the bottom plate; a smoke exhaust port communicated with the smoke exhaust channel is formed in one side, close to the bottom plate, of the edge beam; the covering film is connected with the edge beam, and the smoke outlet is covered with the covering film; the covering film is provided with a ventilation seam, and the ventilation seam is communicated with the smoke outlet. According to the battery pack tray provided by the embodiment of the invention, the covering film is arranged on the side beam corresponding to the smoke exhaust port, and the covering film can block metal powder and foreign matters carried in the smoke exhaust channel, so that the metal powder and the foreign matters are prevented from entering the accommodating space of the battery pack tray to damage the battery cell.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and more specifically, to a battery pack tray, a battery pack and an electrical device. Background Art

[0002] As my country continues to increase its efforts to promote new energy vehicles, electric vehicles with green and environmentally friendly characteristics have become an inevitable trend in the development of the future automobile industry. They will gradually replace traditional fuel buses and become the daily means of transportation for ordinary people. The power source of electric vehicles is lithium battery packs. As an important component of electric vehicles, the improvement of various performances of lithium battery packs has always been the focus of the industry.

[0003] When a lithium battery pack cell experiences thermal runaway, its explosion-proof valve opens, and the smoke and gas generated inside the cell are discharged through the explosion-proof valve, and then discharged to the outside of the battery pack through the smoke exhaust channel provided on the battery pack tray to prevent an explosion accident.

[0004] However, since the smoke exhaust duct will produce metal powders and foreign objects such as aluminum chips to varying degrees during the manufacturing process, these metal powders and foreign objects are basically in blind spots and difficult to remove; thus, the metal powders and foreign objects will enter the interior of the battery pack tray along the smoke exhaust duct during the production process and the use of the battery pack, which may damage the battery cells and cause the battery pack to be scrapped.

[0005] In view of this, it is necessary to propose a new technical solution to solve the above technical problems. Utility Model Content

[0006] One purpose of the present application is to provide a new technical solution for a battery pack tray, a battery pack and an electrical device.

[0007] According to a first aspect of the present application, a battery pack tray is provided, the battery pack tray comprising:

[0008] A pallet body, the pallet body comprising a side beam and a bottom plate connected to each other, a smoke exhaust passage formed inside the side beam, or a smoke exhaust passage formed inside the side beam and inside the bottom plate; a smoke exhaust port connected to the smoke exhaust passage is formed on one side of the side beam close to the bottom plate;

[0009] The covering film is connected to the side beam and covers the smoke exhaust port; the covering film is provided with a ventilation slit, and the ventilation slit is communicated with the smoke exhaust port.

[0010] Optionally, the coating is adhesively connected to the side beam.

[0011] Optionally, an adhesive is provided on the side of the coating film facing the side beam, and the coating film and the side beam are bonded and connected by the adhesive; the adhesive and the smoke exhaust port are staggered.

[0012] Optionally, the coating is one of a PET film, a mica film or a PI film.

[0013] Optionally, the thickness of the coating is in the range of greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

[0014] Optionally, the shape of the coating is circular, oval, rectangular, square or irregular.

[0015] Optionally, the ventilation seam is linear.

[0016] Optionally, the number of the ventilation slits is two, and the two ventilation slits are cross-connected to each other.

[0017] According to a second aspect of the present application, a battery pack is provided, comprising a battery pack tray as described in the first aspect, and further comprising a plurality of battery cells, wherein the side beams and the bottom plate enclose a receiving space, and the plurality of battery cells are arranged in the receiving space.

[0018] According to a third aspect of the present application, an electrical device is provided, wherein the electrical device comprises the battery pack as described in the second aspect.

[0019] The technical solution adopted in this application can achieve the following beneficial effects:

[0020] In the battery pack tray provided in the embodiment of the present application, a coating is provided on the side beam corresponding to the smoke exhaust port, and the coating can block the metal powder and foreign matter carried in the smoke exhaust channel, preventing the metal powder and foreign matter from entering the storage space of the battery pack tray and causing damage to the battery cell. In addition, a ventilation slit is provided on the coating, and the ventilation slit is connected to the smoke exhaust port. When the battery cell has thermal runaway, smoke or gas can enter the smoke exhaust port through the ventilation slit and then be discharged out of the battery pack through the smoke exhaust channel.

[0021] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0023] Figure 1 is a schematic structural diagram of a battery pack tray according to an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the structure of the coating in the battery pack tray according to an embodiment of the present application. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the structure of the coating in the battery pack tray according to an embodiment of the present application. Figure 2 .

[0026] Description of reference numerals:

[0027] 1. Battery pack tray; 11. Tray body; 111. Side beam; 112. Bottom plate; 113. Partition plate; 110. Smoke exhaust port; 12. Lamination; 120. Air vent; 121. Middle area; 122. Edge area. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0031] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0032] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] Reference Figure 1-Figure 3 As shown, according to an embodiment of the present application, a battery pack tray 1 is provided. The battery pack tray 1 includes a tray body 11 and a coating 12, wherein the tray body 11 includes a side beam 111 and a bottom plate 112 connected to each other, wherein a smoke exhaust passage is formed inside the side beam 111, or a smoke exhaust passage is formed inside the side beam 111 and inside the bottom plate 112; a smoke exhaust port 110 connected to the smoke exhaust passage is provided on one side of the side beam 111 close to the bottom plate 112;

[0034] The covering film 12 is connected to the side beam 111 , and the covering film 12 covers the smoke exhaust port 110 ; the covering film 12 is provided with a ventilation slit 120 , and the ventilation slit 120 is communicated with the smoke exhaust port 110 .

[0035] The battery pack tray 1 provided in the embodiment of the present application is used to accommodate the battery cells of the battery pack; specifically, the side beams 111 and the bottom plate 112 are interconnected and enclosed to form a receiving space, and a plurality of the battery cells are arranged in the receiving space. In addition, the battery pack tray 1 also includes a partition 113, which is arranged on the bottom plate 112 and connected to the side beams 111; the partition 113 divides the receiving space into a plurality of areas for placing the battery cells. When a battery cell experiences thermal runaway, its internal air pressure increases, causing the explosion-proof valve on it to open, so that the flame, smoke or gas inside the battery cell is discharged from the battery cell by the explosion-proof valve, and then rushes to the smoke exhaust port 110, and then is discharged out of the battery pack through the smoke exhaust channel.

[0036] Optionally, the smoke exhaust channel can be only provided inside the side beam 111; or, the smoke exhaust channel can be provided inside the side beam 111 and inside the bottom plate 112, and the smoke exhaust channel inside the side beam 111 and the smoke exhaust channel inside the bottom plate 112 are interconnected. In addition, a smoke exhaust channel can also be provided inside the partition 113.

[0037] The smoke exhaust channel plays a key role in preventing explosion accidents during the thermal runaway of the above-mentioned battery cells. However, since the smoke exhaust channel will produce metal powders and foreign objects such as aluminum chips to varying degrees during the manufacturing process, and these metal powders and foreign objects are basically in dead corners and difficult to remove; the above-mentioned metal powders and foreign objects carried by the battery pack tray 1 when it is delivered will enter the storage space of the battery pack tray 1 through the smoke exhaust port 110 along the smoke exhaust channel during the production process and the use of the battery pack, and may cause damage to the battery cells. For example, aluminum chips or some metal foreign objects may cause a short circuit in the battery cells; and will also cause wear on the battery cells.

[0038] Therefore, in the battery pack tray 1 provided in the embodiment of the present application, a coating 12 is provided on the side beam 111 corresponding to the smoke exhaust port 110, and the coating 12 can have a blocking effect on the above-mentioned metal powder and foreign matter, and prevent the metal powder and foreign matter from entering the receiving space of the battery pack tray 1 and causing damage to the battery cell. In addition, a ventilation slit 120 is provided on the coating 12, and the ventilation slit 120 is connected to the smoke exhaust port 110. When the battery cell has thermal runaway, smoke or gas can enter the smoke exhaust port 110 through the ventilation slit 120 and then be discharged out of the battery pack through the smoke exhaust channel. That is, the coating 12 can not only effectively ensure that the receiving space of the battery pack tray 1 is connected to the smoke exhaust channel, but also effectively reduce the foreign matter in the smoke exhaust channel from entering the receiving space of the battery pack tray 1 and damaging the battery cell.

[0039] Reference Figure 1 As shown, a plurality of smoke exhaust ports 110 are provided on the side beam 111. In order to show the smoke exhaust ports 110, Figure 1 In the figure, the covering film 12 is only shown at one of the smoke exhaust ports 110 ; in fact, the covering films 12 are arranged in a one-to-one correspondence with the smoke exhaust ports 110 , that is, the covering film 12 is arranged at each smoke exhaust port 110 .

[0040] In one embodiment, the coating 12 is bonded to the side beam 111 .

[0041] In this specific example, the coating 12 is installed at the position where the smoke exhaust port 110 is provided on the side beam 111 by bonding, and the installation method of the coating 12 is simple and easy to operate. Generally speaking, the coating 12 is bonded at the pre-treatment station of the pallet.

[0042] In one embodiment, an adhesive is provided on the side of the coating 12 facing the side beam 111 , and the coating 12 and the side beam 111 are bonded and connected by the adhesive; the adhesive and the smoke exhaust port 110 are staggered.

[0043] In this specific example, the coating 12 is provided with an adhesive on one side thereof when it is supplied, and the side provided with the adhesive is the side of the coating 12 facing the side beam 111 and connected to the side beam 111. Optionally, the adhesive may be, for example, adhesive backing; the coating 12 may be pasted on the smoke outlet 110 of the side beam 111 by tearing off the adhesive backing, and the pasting process is convenient and easy to operate.

[0044] In the coating 12 , a ventilation slit 120 is provided in the central area thereof, and the central area 121 provided with the ventilation slit 120 corresponds to the smoke exhaust port 110 ; and the adhesive is arranged in the edge area 122 on the side of the coating 12 , that is, the adhesive and the smoke exhaust port 110 are staggered to prevent metal powder and foreign matter in the smoke exhaust channel from adhering and gathering at the smoke exhaust port 110 .

[0045] In one embodiment, the coating 12 is one of a PET film, a mica film or a PI film.

[0046] In this specific example, the coating 12 is made of a film with good ductility and elasticity, such as PET film, mica film or PI film; when air flows from the storage space of the battery pack tray 1 toward the smoke exhaust port 110, the air slit 120 on the coating 12 will easily open and expand to facilitate the rapid circulation of air; and when there is no air flow, the air slit 120 will quickly return to its original state.

[0047] In addition, since the inner side of the side beam 111 facing the receiving space is generally attached with a PET sheet or mica sheet or other attachment layer to play a role of heat conduction and insulation; therefore, the coating 12 can be made of the same material as the attachment layer of the side beam 111 to achieve a better bonding effect between the coating 12 and the side beam 111.

[0048] In one embodiment, the thickness of the coating 12 is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

[0049] If the thickness of the film 12 is too small, its effect of blocking foreign matter will be weakened, while if the thickness of the film 12 is too large, it may affect the speed at which the vent 120 opens under the action of airflow; therefore, in this specific example, the thickness of the film 12 is in the range of 0.1 mm to 0.2 mm; and the specific thickness of the film 12 is selected according to actual conditions. The depth of the vent 120 is the same as the thickness of the film 12, ensuring that the vent 120 passes through the two sides of the film 12.

[0050] In one embodiment, the shape of the coating 12 is circular, oval, rectangular, square or irregular.

[0051] In this specific example, the shape of the coating 12 can be specifically selected according to actual conditions, and this application does not impose any particular limitation.

[0052] Reference Figure 2 , Figure 3 As shown, in one embodiment, the ventilation seam 120 is in a straight line shape.

[0053] In this specific example, the vent slit 120 is set to be linear, so that the vent slit 120 is particularly easy to open, for example, a linear slit running through the two sides of the coating 12 can be cut on the coating 12 with a knife. Of course, the vent slit 120 can also be other shapes according to actual conditions.

[0054] Reference Figure 2 , Figure 3 As shown, in one embodiment, the number of the ventilation slits 120 is two, and the two ventilation slits 120 are cross-connected to each other.

[0055] In this specific example, the two intersecting linear ventilation slits 120 can ensure that the airflow flowing from the receiving space of the battery pack tray 1 toward the smoke exhaust port 110 can quickly break through the ventilation slits 120 to improve the exhaust efficiency.

[0056] According to another embodiment of the present application, a battery pack is provided, which includes the battery pack tray 1 as described above, and also includes a plurality of battery cells. The side beams 111 and the bottom plate 112 enclose a receiving space, and the plurality of battery cells are arranged in the receiving space.

[0057] The battery pack provided in the embodiment of the present application includes the above-mentioned battery pack tray 1, which can protect the battery cells arranged in the accommodating space of the battery pack tray 1, thereby improving the safety performance and service life of the battery pack.

[0058] According to another embodiment of the present application, an electric device is provided, wherein the electric device comprises the battery pack as described above. The electric device may be, for example, an electric vehicle.

[0059] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0060] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery pack tray, characterized in that: The battery pack tray comprises: A tray body (11), the tray body (11) comprising a side beam (111) and a bottom plate (112) connected to each other, a smoke exhaust passage formed inside the side beam (111), or a smoke exhaust passage formed inside both the side beam (111) and the bottom plate (112); a smoke exhaust port (110) connected to the smoke exhaust passage is provided on one side of the side beam (111) close to the bottom plate (112); A coating (12), the coating (12) is connected to the side beam (111), and the coating (12) covers the smoke exhaust port (110); the coating (12) is provided with a ventilation slit (120), and the ventilation slit (120) is communicated with the smoke exhaust port (110).

2. The battery pack tray according to claim 1, characterized in that: The coating (12) is bonded to the side beam (111).

3. The battery pack tray according to claim 2, characterized in that: An adhesive is provided on the side of the coating (12) facing the side beam (111), and the coating (12) and the side beam (111) are bonded and connected via the adhesive; the adhesive and the smoke exhaust port (110) are staggered.

4. The battery pack tray according to claim 1, characterized in that: The coating (12) is one of a PET film, a mica film or a PI film.

5. The battery pack tray according to claim 1, characterized in that: The thickness of the coating (12) is in the range of greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

6. The battery pack tray according to claim 1, characterized in that: The shape of the coating (12) is circular, oval, rectangular, square or irregular.

7. The battery pack tray according to claim 1, characterized in that: The ventilation seam (120) is in a straight line shape.

8. The battery pack tray according to claim 7, characterized in that: The number of the ventilation slits (120) is two, and the two ventilation slits (120) are cross-connected to each other.

9. A battery pack, characterized in that: The battery pack comprises a battery pack tray (1) as described in any one of claims 1 to 8, and also comprises a plurality of battery cells, wherein the side beams (111) and the bottom plate (112) enclose a receiving space, and the plurality of battery cells are arranged in the receiving space.

10. An electrical device, characterized in that: The electrical device comprises the battery pack as claimed in claim 9.

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