Battery pack upper cover and battery pack with same

Abstract

The battery pack upper cover comprises a first plate body and a flame retardant layer, the first plate body comprises a first surface and a second surface which are opposite to each other in the thickness direction of the first plate body, and the first plate body is made of a metal material; the flame-retardant layer is arranged on the first surface, and the flame-retardant layer and the first plate body are integrally formed. The battery pack upper cover disclosed by the utility model is relatively high in safety performance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack upper cover and a battery pack having the same. Background Art

[0002] The battery pack in the related art uses the upper shell of the battery pack to prevent the spread of fire when the battery pack has thermal runaway. When manufacturing the upper shell, it is necessary to paste the mica board on the inside of the upper shell of the battery pack, that is, paste multiple mica boards on the upper shell position just above the battery module inside the battery pack, so as to achieve a flame retardant effect. However, the method of setting up multiple mica boards for flame retardancy is not only inconvenient to install, but also has poor fire and heat resistance effects. When subjected to thermal shock, the mica board is very likely to be delaminated and fractured, resulting in low safety of the battery pack. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model provides a battery pack cover, which has the advantage of higher safety performance.

[0005] The present invention also provides a battery pack according to an embodiment of the present invention. The battery pack has the battery pack top cover of the above embodiment.

[0006] The battery pack cover of the embodiment of the utility model includes: a first plate body, the first plate body includes a first surface and a second surface opposite to each other in the thickness direction thereof, the first plate body is made of metal; a flame retardant layer, the flame retardant layer is arranged on the first surface, and the flame retardant layer is integrally formed with the first plate body.

[0007] The battery pack cover of the utility model embodiment connects the flame retardant layer as a whole to the first plate body, and the flame retardant layer as a whole is formed integrally with the first plate body. This is not only easy to install, but also improves the fire and heat resistance effect, so that the battery pack cover of the utility model embodiment can effectively slow down and prevent the spread of thermal runaway of the battery pack, thereby improving the safety performance of the battery pack.

[0008] Therefore, the battery pack cover of the embodiment of the utility model has the advantage of higher safety performance.

[0009] In some embodiments, the flame retardant layer is a polyurethane foam layer.

[0010] In some embodiments, the flame retardant layer has a dimension of 2 mm to 5 mm in the thickness direction of the first plate.

[0011] In some embodiments, the first plate is made of iron or copper.

[0012] In some embodiments, the first plate has a dimension of 0.1 mm to 0.6 mm in a thickness direction thereof.

[0013] In some embodiments, the battery pack cover further includes: a first reinforcement layer, the first reinforcement layer is arranged on the second surface; a second reinforcement layer, the flame retardant layer includes a third surface and a fourth surface opposite to each other in the thickness direction of the first plate body, the third surface is connected to the first surface, and the second reinforcement layer is arranged on the fourth surface.

[0014] In some embodiments, the first reinforcement layer is a fiber fabric layer; and / or the second reinforcement layer is a fiber fabric layer.

[0015] In some embodiments, the battery pack cover further includes: a threaded through hole, wherein there are multiple threaded through holes, and each of the threaded through holes penetrates the first plate body and the flame retardant layer in the thickness direction of the first plate body.

[0016] The battery pack of the embodiment of the utility model includes the battery pack cover described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a battery pack upper cover according to an embodiment of the utility model.

[0018] Reference numerals:

[0019] Battery pack upper cover 100;

[0020] First plate body 1; first surface 11; second surface 12;

[0021] Flame retardant layer 2; third surface 21; fourth surface 22;

[0022] A first reinforcement layer 31 ; a second reinforcement layer 32 . DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0024] The battery pack upper cover 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, the battery pack cover 100 of the embodiment of the utility model includes a first plate body 1 and a flame retardant layer 2.

[0026] The first plate body 1 includes first surfaces 11 (eg, Figure 1The lower surface of the first plate body 1) and the second surface 12 (eg Figure 1 The flame retardant layer 2 is disposed on the first surface 11, and the flame retardant layer 2 and the first plate body 1 are integrally formed.

[0027] The first plate 1 is made of metal, which is tough and has a high melting point. During thermal runaway, the impact flow generated by the lithium battery cell impacts the flame retardant layer 2, and then the first plate 1 protects the flame retardant layer 2, effectively preventing the impact of the battery cell and avoiding damage to the flame retardant layer 2.

[0028] The battery pack cover 100 of the embodiment of the utility model connects the flame retardant layer 2 as a whole to the first plate body 1, and the flame retardant layer 2 as a whole is formed integrally with the first plate body 1. This is not only easy to install, but also improves the fire and heat resistance effect, so that the battery pack cover 100 of the embodiment of the utility model can effectively slow down and prevent the spread of thermal runaway of the battery pack, thereby improving the safety performance of the battery pack.

[0029] Therefore, the battery pack cover 100 of the embodiment of the present invention has the advantage of higher safety performance.

[0030] In order to make the present application easier to understand, the battery pack cover 100 of the embodiment of the present utility model is further described below by taking the case where the thickness direction of the first plate body 1 is consistent with the up-down direction as an example.

[0031] like Figure 1 As shown, the battery pack cover 100 of the embodiment of the utility model includes a first plate body 1, a flame retardant layer 2, a first reinforcement layer 31 and a second reinforcement layer 32. The first reinforcement layer 31, the first plate body 1, the flame retardant layer 2 and the second reinforcement layer 32 are stacked in sequence in the up and down direction, and the first plate body 1 and the flame retardant layer 2 are located between the first reinforcement layer 31 and the second reinforcement layer 32.

[0032] Preferably, the flame retardant layer 2 is a polyurethane foam layer. When subjected to thermal shock, the polyurethane foam can produce an expanded heat-insulating layer, which can effectively ensure that the temperature of the outer surface of the battery pack is lower than 200° C., thereby further improving the safety performance of the battery pack upper cover 100 of the embodiment of the utility model.

[0033] Optionally, the size of the flame retardant layer 2 in the up and down direction is 2mm-5mm. Optionally, the size of the flame retardant layer 2 in the up and down direction is 2.5mm-4.5mm. Optionally, the size of the flame retardant layer 2 in the up and down direction is 3mm-4mm. On the one hand, it is ensured that the flame retardant layer 2 has sufficient thickness to ensure its flame retardant effect. On the other hand, it is prevented that the thickness of the flame retardant layer 2 is too large, resulting in structural redundancy of the battery pack cover 100 of the embodiment of the utility model, and the overall size of the battery pack is prevented from being too large.

[0034] The dimensions of the flame retardant layer 2 in the up and down directions include but are not limited to 2 mm, 2.5 mm, 3.1 mm, 3.8 mm, 4.2 mm, 4.9 mm or 5 mm.

[0035] In some embodiments, the material of the first plate body 1 is iron or copper. In other words, the material of the first plate body 1 is iron; or, the material of the first plate body 1 is copper. Thus, the first plate body 1 can have a greater structural strength and a higher melting point, thereby effectively preventing the impact of the battery cell.

[0036] Optionally, the dimension of the first plate body 1 in the up-down direction is 0.1mm-0.6mm. Optionally, the dimension of the first plate body 1 in the up-down direction is 0.2mm-0.5mm. Optionally, the dimension of the first plate body 1 in the up-down direction is 0.3mm-0.4mm. On the one hand, the first plate body 1 has sufficient thickness to ensure that the first plate body 1 has greater structural strength and its impact resistance. On the other hand, the thickness of the first plate body 1 is prevented from being too large, which causes structural redundancy of the battery pack cover 100 of the embodiment of the utility model and prevents the overall size of the battery pack from being too large.

[0037] The dimensions of the first plate body 1 in the up and down directions include but are not limited to 1 mm, 2.5 mm, 3 mm, 4 mm, 4.9 mm, 5 mm or 6 mm.

[0038] In some embodiments, Figure 1 As shown, the first reinforcement layer 31 is disposed on the second surface 12. The flame retardant layer 2 includes a third surface 21 and a fourth surface 22 that are opposite to each other in the up-down direction, the third surface 21 is connected to the first surface 11, and the second reinforcement layer 32 is disposed on the fourth surface 22. Thus, the first plate 1 and the flame retardant layer 2 are reinforced by the first reinforcement layer 31 and the second reinforcement layer 32, thereby improving the overall strength of the battery pack cover 100 of the embodiment of the utility model, making it less susceptible to damage, thereby further improving the safety performance of the battery pack cover 100 of the embodiment of the utility model

[0039] In some embodiments, the first reinforcement layer 31 is a fiber fabric layer; and / or, the second reinforcement layer 32 is a fiber fabric layer. In other words, the first reinforcement layer 31 is a fiber fabric layer; or, the second reinforcement layer 32 is a fiber fabric layer; or, the first reinforcement layer 31 and the second reinforcement layer 32 are both fiber fabric layers. Thus, the first reinforcement layer 31 and the second reinforcement layer 32 have sufficient strength to support and reinforce the first plate body 1 and the flame retardant layer 2.

[0040] In some embodiments, the battery pack cover 100 of the embodiment of the utility model further includes a threaded through hole (not shown in the figure), and there are multiple threaded through holes, each of which penetrates the first plate body 1 and the flame retardant layer 2 in the up and down direction of the first plate body 1. This facilitates the installation of the battery pack cover 100 by bolts, thereby improving the practicality of the battery pack cover 100 of the embodiment of the utility model.

[0041] The battery pack of the embodiment of the utility model includes the battery pack upper cover 100 of any of the above embodiments. The upper cover of the battery pack of the embodiment of the utility model is formed by connecting the flame retardant layer 2 as a whole to the first plate body 1, and the flame retardant layer 2 as a whole is formed integrally with the first plate body 1, which is not only easy to install, but also improves the fire and heat resistance effect, so that the battery pack upper cover 100 of the embodiment of the utility model can effectively slow down or prevent the spread of thermal runaway of the battery pack, and improve the safety performance of the battery pack.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery pack cover, characterized in that: include: A first plate body, the first plate body comprising a first surface and a second surface opposite to each other in a thickness direction thereof, and the first plate body is made of metal; a flame retardant layer, the flame retardant layer being disposed on the first surface and being integrally formed with the first plate body; a first reinforcement layer, the first reinforcement layer being disposed on the second surface; The second reinforcement layer includes a third surface and a fourth surface opposite to each other in the thickness direction of the first plate body, the third surface is connected to the first surface, and the second reinforcement layer is arranged on the fourth surface.

2. The battery pack cover according to claim 1, characterized in that: The flame retardant layer is a polyurethane foam layer.

3. The battery pack cover according to claim 1 or 2, characterized in that: The size of the flame retardant layer in the thickness direction of the first plate body is 2 mm-5 mm.

4. The battery pack cover according to claim 1, characterized in that: The first plate is made of iron or copper.

5. The battery pack cover according to claim 1, characterized in that: The dimension of the first plate body in the thickness direction is 0.1 mm-0.6 mm.

6. The battery pack cover according to claim 1, characterized in that: The first reinforcement layer is a fiber fabric layer; and / or the second reinforcement layer is a fiber fabric layer.

7. The battery pack cover according to claim 1, characterized in that: Further including: There are multiple threaded through holes, and each of the threaded through holes penetrates the first plate body and the flame retardant layer in the thickness direction of the first plate body.

8. A battery pack, characterized in that: A battery pack cover comprising the battery pack cover described in any one of claims 1-7.

Images