Lower shell for battery pack and battery pack

Abstract

The utility model provides a lower shell for a battery pack and the battery pack, the structure of the lower shell for the battery pack comprises a shell main body, and the shell main body can be provided with a battery module of the battery pack; the elastic plate is mounted at the bottom of the shell main body; and the lower protection plate is mounted at the bottom of the elastic plate. According to the lower shell for the battery pack and the battery pack, the problem that the lower shell of the existing battery pack is easy to damage when colliding with a sharp object can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a lower shell for a battery pack and a battery pack. Background Art

[0002] With the rise of revolutionary changes in the contemporary automobile industry, pure electric vehicles as new energy vehicles are becoming more and more popular in all walks of life. Among them, the endurance and safety of electric vehicles have become the key constraints for new energy vehicles to gain market recognition and customer trust. The battery pack of an electric vehicle is the core component of an electric vehicle, which is directly related to the performance, endurance, and safe and reliable operation of the motor of the electric vehicle. Unlike traditional fuel vehicles, the quality of the battery pack affects the overall quality of the electric vehicle, and the stiffness, strength, and sealing of the battery pack affect the safety performance of the entire electric vehicle. Therefore, the battery pack of an electric vehicle needs to have high strength and stiffness, as well as the characteristics of impact resistance and fatigue resistance.

[0003] The lower shell of the existing battery pack is often damaged when it collides with a sharp object, which may cause the lower shell to be punctured, thereby damaging the battery. In more serious cases, the battery may leak and easily cause an explosion. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a lower shell for a battery pack and a battery pack, so as to solve the problem that the lower shell of the existing battery pack is easily damaged when colliding with a sharp object.

[0005] According to the first aspect of the utility model, a lower shell for a battery pack is provided, wherein the lower shell for the battery pack comprises: a shell body, the shell body can be equipped with a battery module of the battery pack; an elastic plate installed at the bottom of the shell body; and a lower guard plate installed at the bottom of the elastic plate.

[0006] Preferably, the elastic plate member comprises: a protective frame plate installed between the lower guard plate and the shell body, wherein a plurality of staggered skeletons are arranged inside the protective frame plate; and an elastic member filled inside the protective frame plate.

[0007] Preferably, the plurality of skeletons divide the interior of the protective frame plate into a plurality of grids, the elastic member is formed into a block structure, and the plurality of elastic members are respectively arranged in the plurality of grids.

[0008] Preferably, the shell body includes: a battery mounting portion, arranged inside the shell body, for mounting the battery module; and a module mounting portion, arranged at the end inside the shell body, for mounting the battery control module and the circulation module of the battery pack, and a partition is arranged between the module mounting portion and the battery mounting portion.

[0009] Preferably, the shell body includes: a bottom plate, which is connected to the elastic plate and the lower guard plate; and a side plate, which is arranged around the top of the bottom plate, and the bottom of the side plate is connected to the edge of the bottom plate.

[0010] Preferably, a plurality of the partitions are arranged in the battery mounting portion, the bottom of the partition is connected to the bottom plate, the two ends of the partition are connected to the side plates, and the plurality of battery modules are respectively arranged between the plurality of the partitions.

[0011] Preferably, a circulating water channel is provided in the bottom plate, and the circulating water channel is located at the lower part of the battery module.

[0012] Preferably, the side plate is provided with a cable groove corresponding to the module mounting portion.

[0013] Preferably, a plurality of L-shaped connecting plates are provided on the outer periphery of the side plate, and the plurality of L-shaped connecting plates are arranged at intervals along the outer periphery of the side plate.

[0014] According to a second aspect of the present invention, a battery pack is provided, wherein the battery pack includes the lower shell for the battery pack as described above.

[0015] The lower shell and battery pack for the battery pack of the embodiment of the utility model, the battery module of the battery pack can be installed in the shell body. The elastic plate is installed at the bottom of the shell body, and the lower guard plate is installed at the bottom of the elastic plate. When the lower shell of the battery pack is hit by a sharp object, the lower guard plate can enlarge the force-bearing area so that the pressure during the impact is evenly distributed on the elastic plate. The elastic plate contracts when under pressure to reduce the pressure to protect the battery module and avoid being pierced by sharp objects. This can effectively solve the problem that the lower shell of the existing battery pack is easily damaged when colliding with a sharp object.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the lower shell of the battery pack according to the present invention.

[0019] Figure 2 It is a schematic diagram of the shell body according to the utility model.

[0020] Figure 3 It is a schematic diagram of the elastic plate and the lower guard plate according to the utility model.

[0021] Figure 4 It is a cross-sectional view of the lower shell of the battery pack according to the present invention.

[0022] Figure numerals: 1-shell body; 100-battery mounting part; 200-module mounting part; 11-side panel; 110-cable trough; 12-bottom panel; 120-circulating water channel; 13-partition; 14-L-shaped connecting plate; 2-elastic plate; 21-protective frame plate; 210-skeleton; 22-elastic member; 3-lower guard plate. DETAILED DESCRIPTION

[0023] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0025] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0026] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0027] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0028] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0029] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0030] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0031] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0032] like Figures 1 to 4 As shown, according to a first aspect of the utility model, a lower shell for a battery pack is provided, and the lower shell for the battery pack includes a shell body 1, an elastic plate 2 and a lower guard plate 3.

[0033] In the following description, reference will be made to Figures 1 to 4 The specific structure of the above components of the lower shell for the battery pack and the connection relationship of the above components are specifically described.

[0034] like Figures 1 to 4 As shown, in an embodiment, the battery module of the battery pack can be installed in the shell body 1. The elastic plate 2 can be installed at the bottom of the shell body 1. The lower guard plate 3 can be installed at the bottom of the elastic plate 2. In this way, when the lower shell of the battery pack is hit by a sharp object, the lower guard plate 3 can enlarge the force-bearing area so that the pressure during the impact is evenly distributed on the elastic plate 2. The elastic plate 2 shrinks when it is under pressure to reduce the pressure and protect the battery module. In addition, the lower guard plate 3 and the elastic plate 2 can also block sharp objects to prevent the lower shell of the battery pack from being pierced by sharp objects.

[0035] Preferably, Figures 1 to 4As shown, in an embodiment, the shell body 1 may include a bottom plate 12 and a side plate 11. The bottom plate 12 may be connected to the elastic plate 2 and the lower guard plate 3 by screws, thereby fixing the elastic plate 2 and the lower guard plate 3 to the bottom plate 12. The side plate 11 may be arranged around the top of the bottom plate 12. Specifically, the plate surface of the side plate 11 may be perpendicular to the plate surface of the bottom plate 12. The bottom of the side plate 11 may be connected to the edge of the bottom plate 12. The side plate 11 may be arranged around the edge of the bottom plate 12, so that the side plate 11 and the bottom plate 12 can enclose a space for accommodating a battery module. More preferably, the side plate 11 may be integrally formed with the bottom plate 12. In addition, a threaded hole may be provided at the top end of the side plate 11 for installing a top plate at the top end of the side plate 11.

[0036] More preferably, Figures 1 to 4 As shown, in an embodiment, the shell body 1 may include a battery mounting portion 100 and a module mounting portion 200. The battery mounting portion 100 may be arranged inside the shell body 1 for mounting the battery module. The module mounting portion 200 may be arranged at the end inside the shell body 1. The module mounting portion 200 may be used to mount a battery control module and a circulation module of a battery pack. A partition 13 may be provided between the module mounting portion 200 and the battery mounting portion 100, that is, the space formed by the side plate 11 and the bottom plate 12 is separated into a battery mounting portion 100 and a module mounting portion 200 by the partition 13. Preferably, the module mounting portion 200 may be formed as a trapezoidal mounting groove to facilitate the installation of a battery control module and a circulation module. The battery mounting portion 100 may be formed as a rectangular mounting groove to facilitate the installation of a battery module.

[0037] Preferably, Figures 1 to 4 As shown, in an embodiment, a plurality of partitions 13 may be further provided in the battery mounting portion 100. Specifically, the partition 13 may be a rectangular plate. The partition 13 may be provided along the width direction of the shell body 1. The bottom end of the partition 13 may be connected to the bottom plate 12. Both ends of the partition 13 in the length direction may be connected to the side plate 11. Preferably, the partition 13 may be integrally formed with the bottom plate 12 and the side plate 11. A plurality of partitions 13 may be provided at intervals in the length direction of the shell body 1. A plurality of battery modules of the battery pack may be provided respectively between a plurality of partitions 13. Such a provision can separate adjacent battery cell modules to facilitate heat dissipation of the battery cell modules. In addition, the partition 13 is provided in the shell body 1, which can also enhance the stability of the shell body 1 and further improve the overall strength of the lower shell for the battery pack.

[0038] Preferably, Figures 1 to 4As shown, in an embodiment, a circulating water channel 120 may also be provided on the base plate 12. Specifically, the circulating water channel 120 may be a built-in pipe in the base plate 12 (the figure is only a schematic diagram of the position of the circulating water channel 120). The circulating water channel 120 may be arranged in a coiled manner inside the base plate 12. The number of the circulating water channels 120 may be multiple or one connected water channel, and both ends of the circulating water channel 120 may be connected to an external circulation device. Preferably, the circulating water channel 120 may be arranged at the lower part of the battery module. The coolant is allowed to flow in the circulating water channel 120 while the vehicle is driving. The vehicle may heat or cool the coolant to achieve heating or heat dissipation of the battery module, thereby achieving temperature regulation of the battery pack.

[0039] Preferably, Figure 1 and Figure 2 As shown, in the embodiment, the side panel 11 may be provided with a cable slot 110 at the corresponding module mounting portion 200. Specifically, as Figure 1 As shown, the cable groove 110 can be opened on the left end surface of the shell body 1. The cable groove 110 can be a rectangular window. The cable groove 110 can connect the module installation part 200 with the outside of the shell body 1. The cable groove 110 is used for connecting the lines of the battery control module and the circulation module to the vehicle.

[0040] Preferably, Figure 1 and Figure 2 As shown, in the embodiment, a plurality of L-shaped connecting plates 14 may be further provided on the periphery of the side panel 11 (i.e., the periphery of the lower shell for the battery pack). One side surface of the L-shaped connecting plate 14 may be screwed to the surface of the side panel 11, and the other side surface of the L-shaped connecting plate 14 may be arranged horizontally. A plurality of L-shaped connecting plates 14 may be arranged at intervals along the periphery of the side panel 11. The L-shaped connecting plate 14 is used to be screwed to the bottom of the vehicle, thereby mounting the lower shell for the battery pack on the vehicle.

[0041] In addition, preferably, Figure 3 and Figure 4 As shown, in an embodiment, the elastic plate 2 may include a protective frame plate 21 and an elastic member 22. Among them, the protective frame plate 21 may be a strip-shaped frame. The shape and size of the protective frame plate 21 may be the same as the shell body 1, so that the edge of the shell body 1 can be screwed to the protective frame plate 21. The protective frame plate 21 can be installed between the lower guard plate 3 and the shell body 1. A plurality of staggered skeletons 210 may also be provided on the inner side of the protective frame plate 21 to support the protective frame plate 21 to increase the strength of the elastic plate 2. The elastic member 22 may be made of rubber, and the elastic member 22 may be filled inside the protective frame plate 21 to absorb impact force.

[0042] Further, preferably, Figure 3 and Figure 4 As shown, in an embodiment, a plurality of skeletons 210 can be arranged at intervals along the length direction and the width direction of the protective frame plate 21, respectively, so that the plurality of skeletons 210 can separate the interior of the protective frame plate 21 into a plurality of grids. Accordingly, the elastic member 22 can be formed into a block structure (i.e., a rubber block). A plurality of elastic members 22 can be respectively arranged in a plurality of the grids to regularly fill the internal space of the protective frame plate 21. When the lower shell of the battery pack is impacted, the elastic member 22 can shrink to reduce the impact force on the battery module.

[0043] In addition, according to a second aspect of the present invention, a battery pack is provided, the battery pack comprising the lower shell for the battery pack as described above, and the battery pack may be the battery pack in the above embodiment.

[0044] During use, the battery module of the battery pack is installed in the shell body 1. When the lower shell of the battery pack is hit by a sharp object, the lower guard plate 3 can enlarge the force-bearing area so that the pressure of the impact is evenly distributed on the elastic plate 2. The elastic member 22 in the elastic plate 2 contracts when under pressure to reduce the pressure and protect the battery module. In addition, the lower guard plate 3 and the elastic plate 2 can also block sharp objects, thereby preventing the lower shell of the battery pack from being pierced by sharp objects.

[0045] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A lower shell for a battery pack, arranged on the battery pack, characterized in that: The lower housing for the battery pack comprises: A shell body, wherein the shell body can be equipped with a battery module of the battery pack; an elastic plate mounted on the bottom of the housing body; and A lower guard plate is installed at the bottom of the elastic plate.

2. The lower housing for a battery pack according to claim 1, characterized in that: The elastic plate comprises: A protective frame plate installed between the lower guard plate and the shell body, wherein a plurality of staggered skeletons are arranged in the protective frame plate; and An elastic member is filled in the interior of the protective frame plate.

3. The lower housing for the battery pack according to claim 2, characterized in that: The plurality of frames divide the interior of the protection frame plate into a plurality of grids, the elastic member is formed into a block structure, and the plurality of elastic members are respectively arranged in the plurality of grids.

4. The lower housing for a battery pack according to claim 1, characterized in that: The housing body comprises: A battery mounting portion, disposed inside the housing body and used for mounting the battery module; and The module mounting portion is arranged at the inner end of the shell body and is used to mount the battery control module and the circulation module of the battery pack. A partition is arranged between the module mounting portion and the battery mounting portion.

5. The lower housing for the battery pack according to claim 4, characterized in that: The housing body comprises: A bottom plate connected to the elastic plate and the lower guard plate; and The side plate is arranged around the top of the bottom plate, and the bottom of the side plate is connected to the edge of the bottom plate.

6. The lower housing for the battery pack according to claim 5, characterized in that: A plurality of partitions are arranged in the battery installation part, the bottom of the partition is connected to the bottom plate, the two ends of the partition are connected to the side plates, and the plurality of battery modules are respectively arranged between the plurality of partitions.

7. The lower housing for a battery pack according to claim 6, characterized in that: A circulating water channel is arranged in the bottom plate, and the circulating water channel is located at the lower part of the battery module.

8. The lower housing for a battery pack according to claim 5, characterized in that: The side plate is provided with a cable groove at a position corresponding to the module installation portion.

9. The lower housing for a battery pack according to claim 5, characterized in that: A plurality of L-shaped connecting plates are arranged at intervals along the outer circumference of the side plate.

10. A battery pack, characterized in that: The battery pack comprises the lower case for the battery pack according to any one of claims 1 to 9.

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