Battery pack multi-layer protection structure, battery pack protection plate, battery pack and electric equipment

Abstract

The utility model discloses a battery pack multi-layer protection structure, a battery pack protection plate, a battery pack and electric equipment. The battery pack multi-layer protection structure comprises a bottom protection plate; the tray bottom plate is arranged at one end of the bottom protection plate, and a mounting space is defined between the tray bottom plate and the bottom protection plate; the protection assembly is arranged in the installation space and comprises a buffering piece and an elastic piece, one end of the buffering piece is connected with the tray bottom plate, the other end of the buffering piece is connected with one end of the elastic piece, and the other end of the elastic piece is connected to the bottom protection plate. The elastic piece and the buffer piece are arranged between the bottom protection plate and the tray bottom plate, so that the elastic piece and the buffer piece can be used for buffering and absorbing impact force from the outside in sequence, the battery pack can bear larger impact force, the impact force borne by a battery cell can be reduced, the battery pack is further protected, and the service life of the battery pack is prolonged. And the battery pack can work normally.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a battery pack multi-layer protection structure, a battery pack protective plate, a battery pack and electrical equipment. Background Art

[0002] In the related art, the multi-layer protection structure at the bottom of the battery pack is usually composed of a tray bottom plate, a buffer cotton and a composite glass fiber board. However, such a multi-layer protection structure is usually used in the case of low energy protection level, and it is difficult to protect the battery pack in the case of high energy protection level. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a multi-layer protection structure for a battery pack, which can use elastic parts and buffer parts to buffer and absorb the impact force from the outside in sequence, so that the battery pack can withstand greater impact force, reduce the impact force on the battery cell, and further protect the battery pack, so that the battery pack can work normally.

[0004] The utility model further proposes a battery pack protective plate.

[0005] The utility model further provides a battery pack.

[0006] The utility model further provides an electrical device.

[0007] According to the utility model, the multi-layer protection structure of the battery pack includes: a bottom guard plate; a tray bottom plate, the tray bottom plate is arranged at one end of the bottom guard plate, and an installation space is defined between the tray bottom plate and the bottom guard plate; a protection component, the protection component is arranged in the installation space, and the protection component includes: a buffer and an elastic component, one end of the buffer is connected to the tray bottom plate, the other end of the buffer is connected to one end of the elastic component, and the other end of the elastic component is connected to the bottom guard plate.

[0008] According to the multi-layer protection structure of the battery pack of the utility model, elastic parts and buffer parts are arranged between the bottom guard plate and the bottom plate of the tray, so that the elastic parts and buffer parts can be used to buffer and absorb the impact force from the outside in turn, so that the battery pack can withstand greater impact force, thereby reducing the impact force on the battery cells, thereby achieving protection for the battery pack and enabling the battery pack to work normally.

[0009] In some examples of the present invention, the buffer member includes: a bagged member and a fluid member, the fluid member is arranged in the bagged member, and the bagged member is respectively connected to the tray bottom plate and the elastic member.

[0010] In some examples of the present invention, the buffer member is provided with at least one partitioning portion to divide the buffer member into at least two buffer spaces, and the fluid member is respectively arranged in at least two of the buffer spaces; or there are at least two buffer members, and at least two of the buffer members are arranged in sequence, and the fluid members are respectively arranged in at least two of the buffer members.

[0011] In some examples of the present invention, the buffer component includes: a shell and a fluid component, the fluid component is arranged in the shell, and the shell is respectively connected to the tray bottom plate and the elastic component.

[0012] In some examples of the present invention, the other end of the elastic member is also connected to the tray bottom plate, and a groove is provided on the side of the elastic member facing the tray bottom plate, and the buffer member is provided in the groove.

[0013] In some examples of the present invention, in the up and down directions, the size of the protective component is a, and the value range of a is: 0.05mm<a<100mm.

[0014] In some examples of the present invention, the elastic member is constructed as a rectangular structure, and the elastic member covers the bottom guard plate on one side facing the bottom guard plate.

[0015] The battery pack protective plate according to the utility model comprises: the battery pack multi-layer protective structure described above.

[0016] The battery pack according to the utility model comprises: a battery pack body; and the battery pack protective plate mentioned above, wherein the battery pack protective plate is arranged at the bottom of the battery pack body.

[0017] The electrical equipment according to the utility model includes: the battery pack protective plate or the battery pack mentioned above.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the first structure of the multi-layer protection structure of a battery pack according to an embodiment of the utility model;

[0021] Figure 2 It is a partial schematic diagram of a multi-layer protection structure of a battery pack according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the first structure of the protection component;

[0023] Figure 4 It is a second structural diagram of the protection component;

[0024] Figure 5 is a schematic diagram of a second structure of a multi-layer protection structure for a battery pack according to an embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of the first structure of the elastic member;

[0026] Figure 7 Schematic diagram of the second structure of the elastic member.

[0027] Reference numerals:

[0028] 1. Multi-layer protection structure of battery pack;

[0029] 10. Bottom guard plate; 20. Tray bottom plate; 30. Protection assembly; 31. Buffer component; 311. Bag component; 312. Fluid component; 313. Shell; 32. Elastic component; 321. Groove. DETAILED DESCRIPTION

[0030] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0031] Reference below Figure 1-Figure 7 A multi-layer protection structure 1 for a battery pack according to an embodiment of the present utility model is described. The multi-layer protection structure 1 for a battery pack is used to protect the battery pack so that the battery pack can work normally.

[0032] like Figure 1 As shown, the multi-layer protective structure 1 of the battery pack according to the embodiment of the utility model includes: a bottom guard plate 10, a tray bottom plate 20 and a protective assembly 30. Among them, the bottom guard plate 10 mainly plays a protective role. The tray bottom plate 20 mainly plays a supporting and protective role. The protective assembly 30 mainly plays a buffering and protective role. The material of the bottom guard plate 10 can be aluminum, steel, or a glass fiber composite material that meets the strength standards, and the tensile strength is required to be greater than 50MPa.

[0033] like Figure 1 As shown, the tray bottom plate 20 is arranged at one end of the bottom guard plate 10, and an installation space is defined between the tray bottom plate 20 and the bottom guard plate 10. That is to say, the tray bottom plate 20 and the bottom guard plate 10 are arranged at a distance, and the tray bottom plate 20 and the bottom guard plate 10 are connected, and a sealed space, i.e., an installation space, can be formed in the middle part, and the installation space mainly plays a role of installation.

[0034] like Figure 1 As shown, the protective assembly 30 is arranged in the installation space, and the protective assembly 30 includes a buffer 31 and an elastic member 32. One end of the buffer 31 is connected to the tray bottom plate 20, and the other end of the buffer 31 is connected to one end of the elastic member 32, and the other end of the elastic member 32 is connected to the bottom guard plate 10. It should be noted that the tray bottom plate 20 is connected to the battery cell, and the bottom guard plate 10 is mainly used to protect the bottom of the battery pack, so that the protective assembly 30 is arranged in the installation space, which is more reasonable. The protective assembly 30 can buffer the impact force from the bottom guard plate 10, thereby reducing the impact of the impact force on the tray bottom plate 20, and then can protect the battery cell and achieve protection of the battery pack.

[0035] Among them, the buffer 31 mainly plays a role of buffer protection, and the elastic member 32 can also play a role of buffering. Connecting one end of the buffer 31 to the tray bottom plate 20 can fix one end of the buffer 31, so that the setting of the buffer 31 can be more secure and stable, and the buffer 31 can work better. Connecting the other end of the buffer 31 to one end of the elastic member 32 can fix one end of the elastic member 32, so that the connection between one end of the elastic member 32 and the other end of the buffer 31 is more secure. Connecting the other end of the elastic member 32 to the bottom guard plate 10 can further fix the elastic member 32, so that the setting of the elastic member 32 can be more secure and stable. The elastic member 32 is an elastic buffer material, which can be an elastic silicone plate or other suitable materials.

[0036] In this way, when the battery pack is impacted, the bottom guard plate 10 can first absorb part of the impact force, and the remaining impact force will be transmitted to the elastic member 32. After being buffered by the elastic member 32, part of the impact force can be absorbed again, and then buffered by the buffer member 31 for the second time, so that the force finally transmitted to the battery cell will be greatly reduced, which can better protect the battery pack.

[0037] Therefore, by arranging the elastic member 32 and the buffer member 31 between the bottom guard plate 10 and the tray bottom plate 20, the elastic member 32 and the buffer member 31 can be used to buffer and absorb the impact force from the outside in turn, so that the battery pack can withstand greater impact force, and the impact force on the battery cell can be reduced, thereby protecting the battery pack and enabling the battery pack to work normally. In addition, through the buffering effect of the protective component 30, the center of mass of the vehicle can also be adjusted to make the vehicle travel more stable.

[0038] In addition, if Figure 3As shown, the buffer 31 includes a bagged part 311 and a fluid part 312. The fluid part 312 is arranged in the bagged part 311, and the bagged part 311 is connected to the tray bottom plate 20 and the elastic part 32 respectively. The bagged part 311 mainly plays a packaging role, and the fluid part 312 mainly plays a buffering role. The fluid part 312 is arranged in the bagged part 311, so that the bagged part 311 can be used to encapsulate the fluid part 312, reducing the free movement of the fluid part 312, so that the fluid part 312 can better play a buffering role. The bagged part 311 is connected to the tray bottom plate 20 and the elastic part 32 respectively, that is, the bagged part 311 is arranged between the tray bottom plate 20 and the elastic part 32, so that the connection between the bagged part 311 and the tray bottom plate 20 and the elastic part 32 can be more stable. In this way, when the external impact force is transmitted from the bottom guard plate 10 to the elastic part 32, the elastic part 32 can better transmit the impact force to the bagged part 311, and then the fluid part 312 in the bagged part 311 absorbs the energy, thereby better reducing the force on the tray bottom plate 20, thereby achieving protection of the battery cell.

[0039] In addition, if Figure 3 As shown, the buffer 31 is provided with at least one partition to divide the buffer 31 into at least two buffer spaces, and the fluid parts 312 are respectively arranged in the at least two buffer spaces; or there are at least two buffers 31, which are arranged in sequence between at least two buffers 31, and the fluid parts 312 are respectively arranged in at least two buffers 31. Among them, the partition mainly plays a role of separation. When the number of buffers 31 is one, at least one partition is provided on the buffer 31, so that the buffer 31 can be divided into a plurality of buffer spaces, and the buffer space mainly plays a role of installation, and the fluid parts 312 can be respectively arranged inside the plurality of buffer spaces, so that it is convenient to set the plurality of fluid parts 312.

[0040] Of course, there can be multiple buffers 31, and the multiple buffers 31 are arranged in sequence, and the fluid parts 312 are respectively arranged in at least two buffers 31, so that the arrangement of the multiple buffers 31 can be more compact and comprehensive, so that the impact force from the elastic part 32 can be better absorbed, the tray bottom plate 20 can be protected, and then the battery cell can be protected. Among them, the fluid part 312 can be a non-Newtonian fluid, such as Bingham fluid or pseudoplastic fluid. The non-Newtonian fluid can better absorb the impact energy, so that the protective component 30 can resist higher impact forces.

[0041] It should be noted that the number of the buffer member 31 and the number of the fluid member 312 can be one, and the fluid member 312 is filled inside the buffer member 31, so that the structure is simpler and convenient to set up. Moreover, when there are multiple buffer members 31, in addition to the arrangement method of sequential arrangement, they can also be arranged in multiple rows or multiple layers.

[0042] As an optional embodiment, Figure 4 As shown, the buffer member 31 includes: a shell 313 and a fluid member 312, wherein the fluid member 312 is disposed in the shell 313, and the shell 313 is connected to the tray bottom plate 20 and the elastic member 32 respectively. The shell 313 mainly plays a packaging role, and the fluid member 312 mainly plays a buffering role. The fluid member 312 is disposed in the shell 313, so that the shell 313 can be used to encapsulate the fluid member 312, thereby preventing the fluid member 312 from moving freely, making the arrangement of the fluid member 312 more stable, and the fluid member 312 can better play a buffering role. The shell 313 is connected to the tray bottom plate 20 and the elastic member 32 respectively, that is, the shell 313 is arranged between the tray bottom plate 20 and the elastic member 32, so that the connection between the shell 313 and the tray bottom plate 20 and the elastic member 32 can be more stable. In this way, when the external impact force is transmitted from the bottom guard plate 10 to the elastic member 32, the elastic member 32 can first buffer and absorb the impact force, and then transmit it to the shell 313, and then the fluid member 312 in the shell 313 absorbs the energy, thereby better reducing the force on the tray bottom plate 20, thereby protecting the battery cell. The shell 313 can be a plastic shell or other high-strength shell 313.

[0043] Furthermore, if Figure 5-Figure 7 As shown, the other end of the elastic member 32 is also connected to the tray bottom plate 20, and a groove 321 is provided on the side of the elastic member 32 facing the tray bottom plate 20, and the buffer member 31 is arranged in the groove 321. Among them, the other end of the elastic member 32 is connected to the tray bottom plate 20, that is, the other end of the elastic member 32 can be directly fixedly connected to the tray bottom plate 20, so that the connection between the elastic member 32 and the tray bottom plate 20 can be more stable, and the elastic member 32 can also directly buffer and absorb the force of the bottom guard plate 10, and then transmit it to the tray bottom plate 20. The groove 321 mainly plays a role in installation, and the buffer member 31 is arranged inside the groove 321, so that the buffer member 31 can be fixed. In addition, the groove 321 is arranged on the side of the tray bottom plate 20 facing the elastic member 32, so that the arrangement of the groove 321 is more reasonable, which is convenient for the buffer member 31 inside the groove 321 to cooperate with the tray bottom plate 20, so that the tray bottom plate 20 can be better protected, and then the battery cell can be protected.

[0044] Specifically, Figure 1As shown, in the up and down direction, the size of the protective component 30 is a, and the value range of a is: 0.05mm<a<100mm. That is to say, in the up and down direction, the size of the protective component 30 needs to be within an appropriate range, that is, in the up and down direction, the size of the protective component 30 needs to be greater than 0.05mm, so that the thickness of the protective component 30 in the up and down direction can be guaranteed, thereby ensuring the energy absorption effect of the protective component 30, so as to better protect the battery cell. The size of the protective component 30 needs to be less than 100mm, so as to avoid the battery pack being too large, increasing the volume and weight of the battery pack, and thus increasing the cost. In addition, the protective component 30 is set within 0.05mm to 100mm, so that the protective component 30 can be used in battery packs of various types and spaces, which can improve the applicability of the protective component 30.

[0045] Furthermore, if Figure 2 As shown, the elastic member 32 is constructed as a rectangular structure, and the side of the elastic member 32 facing the bottom guard plate 10 covers the bottom guard plate 10. It should be noted that since the shape of the bottom guard plate 10 is generally rectangular, the elastic member 32 is constructed as a rectangle, which can better adapt to the shape of the bottom guard plate 10. The side of the elastic member 32 facing the bottom guard plate 10 is covered on the bottom guard plate 10, so that the contact area between the elastic member 32 and the bottom guard plate 10 can be increased as much as possible, so that the elastic member 32 can more comprehensively buffer and absorb the impact force energy transmitted by the bottom guard plate 10, so as to better protect the battery cell.

[0046] As an optional embodiment, the buffer member 31 may also be a suitable material such as MPP or glass fiber, and the elastic member 32 may be a buffer cotton. Moreover, the elastic member 32 may be a multi-layer structure, for example, the elastic member 32 may be a structure of a buffer cotton plus an elastic silicone sheet.

[0047] It should be noted that when the bag 311 is used to package the non-Newtonian fluid, the bag 311 can be sealed by glue or foam, and when the shell 313 is used to package the non-Newtonian fluid, it can be sealed by welding.

[0048] The battery pack protective plate according to the embodiment of the utility model comprises: the battery pack multilayer protective structure 1 described in the above embodiment. Among them, the battery pack protective plate is mainly used to protect the battery cell, and the battery pack multilayer protective structure 1 belongs to the main structure of the battery pack protective plate, which can improve the energy absorption and buffering of the battery pack protective plate.

[0049] The battery pack according to the embodiment of the utility model comprises: a battery pack body, and the battery pack protective plate described in the above embodiment, wherein the battery pack protective plate is arranged at the bottom of the battery pack body. The battery pack protective plate is arranged at the bottom of the battery pack body, because the position of the battery pack body when colliding with the outside is usually at the bottom of the battery pack body, so this arrangement is more reasonable, and it is convenient for the battery pack protective plate to directly contact with the external impact force, so as to better protect the battery pack.

[0050] The electrical equipment according to the embodiment of the utility model includes: the battery pack protective plate or the battery pack described in the above embodiment.

[0051] 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.

[0052] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-layer protection structure for a battery pack (1), characterized in that: include: Bottom guard plate (10); A tray bottom plate (20), wherein the tray bottom plate (20) is arranged at one end of the bottom guard plate (10), and an installation space is defined between the tray bottom plate (20) and the bottom guard plate (10); A protective component (30), the protective component (30) is arranged in the installation space, and the protective component (30) comprises: a buffer component (31) and an elastic component (32), one end of the buffer component (31) is connected to the tray bottom plate (20), the other end of the buffer component (31) is connected to one end of the elastic component (32), and the other end of the elastic component (32) is connected to the bottom guard plate (10).

2. The multi-layer protective structure (1) of the battery pack according to claim 1, characterized in that: The buffer member (31) comprises: a bag member (311) and a fluid member (312); the fluid member (312) is arranged in the bag member (311); and the bag member (311) is respectively connected to the tray bottom plate (20) and the elastic member (32).

3. The multi-layer protective structure (1) of a battery pack according to claim 2, characterized in that: The buffer member (31) is provided with at least one partitioning portion to divide the buffer member (31) into at least two buffer spaces, and the fluid member (312) is respectively arranged in the at least two buffer spaces; or There are at least two buffer components (31), and the at least two buffer components (31) are arranged in sequence, and the fluid components (312) are respectively arranged in the at least two buffer components (31).

4. The multi-layer protective structure (1) of a battery pack according to claim 1, characterized in that: The buffer member (31) comprises: a shell (313) and a fluid member (312); the fluid member (312) is arranged in the shell (313); and the shell (313) is respectively connected to the tray bottom plate (20) and the elastic member (32).

5. The multi-layer protective structure (1) of a battery pack according to claim 1, characterized in that: The other end of the elastic member (32) is also connected to the tray bottom plate (20), and a groove (321) is provided on the side of the elastic member (32) facing the tray bottom plate (20), and the buffer member (31) is arranged in the groove (321).

6. The multi-layer protective structure (1) of a battery pack according to claim 1, characterized in that: In the up and down direction, the dimension of the protection component (30) is a, and the value range of a is: 0.05mm<a<100mm.

7. The multi-layer protective structure (1) of a battery pack according to claim 1, characterized in that: The elastic member (32) is constructed as a rectangular structure, and the side of the elastic member (32) facing the bottom guard plate (10) covers the bottom guard plate (10).

8. A battery pack protective plate, characterized in that: include: The multi-layer protective structure (1) of a battery pack according to any one of claims 1 to 7.

9. A battery pack, characterized in that: include: Battery pack body; The battery pack protective plate described in claim 8 is arranged at the bottom of the battery pack body.

10. An electrical device, characterized in that: include: The battery pack guard plate as claimed in claim 8 or the battery pack as claimed in claim 9.

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