Battery box, battery pack and electric device

Abstract

The utility model provides a kind of battery box, battery pack and electric equipment, the battery box includes at least one frame board, each described frame board includes integrally formed frame side beam part and frame bottom plate part, the frame side beam part is bent and connected in one side of the frame bottom plate part;At least one intermediate plate, each described intermediate plate includes integrally formed intermediate side beam part and intermediate bottom plate part, the intermediate side beam part is bent and connected between the two sides of the intermediate bottom plate part;Wherein, the intermediate bottom plate part is connected to the frame bottom plate part, to improve the air tightness of battery box.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery box, battery pack, and electrical equipment. Background Technology

[0002] In related technologies, the battery box includes a base plate, a side plate, and multiple longitudinal beams. The side plate and multiple longitudinal beams need to be welded to the base plate to form a grid-shaped battery cavity structure. The connection between the side plate and the multiple longitudinal beams and the base plate forms multiple welding areas. These welding areas are prone to burn-through, which can lead to air leakage in the battery box. Utility Model Content

[0003] Embodiments of this utility model provide a battery box, a battery pack, and an electrical device that can improve the technical problem of easy air leakage in battery boxes.

[0004] In a first aspect, embodiments of the present invention provide a battery box, comprising:

[0005] The two frame panels, each of the frame panels includes an integrally formed frame side beam portion and a frame bottom plate portion, wherein the frame bottom plate portion is bent and connected to one side of the frame side beam portion;

[0006] At least one intermediate plate, each of the intermediate plates including an integrally formed intermediate side beam portion and an intermediate bottom plate portion, wherein the intermediate side beam portion is bent and connected between the two sides of the intermediate bottom plate portion;

[0007] The two frame plates and at least one intermediate plate are spliced ​​together along a first direction to form a battery cavity, and the intermediate bottom plate is connected to the frame bottom plate to form the bottom of the battery cavity.

[0008] In one embodiment, the battery cavity includes a first battery slot and a second battery slot adjacent to each other, and the intermediate bottom plate portion of the intermediate plate includes a first portion and a second portion, the first portion and the second portion being respectively disposed on both sides of the intermediate side beam portion, wherein the first portion defines the first battery slot and the second portion defines the second battery slot.

[0009] In one embodiment, the battery box includes a plurality of intermediate plates, the plurality of intermediate plates including a first intermediate plate and a second intermediate plate, a first portion of the intermediate bottom plate of the first intermediate plate being connected to the edge bottom plate of the edge plate, and a second portion of the intermediate bottom plate of the first intermediate plate being connected to the first portion of the intermediate bottom plate of the second intermediate plate.

[0010] In one embodiment, the width of the first portion extending along the width direction of the battery box is equal to the width of the second portion extending along the width direction of the battery box.

[0011] In one embodiment, the length of the middle side beam portion of the middle plate extending along the length direction of the battery box is less than the length of the middle bottom plate portion of the middle plate extending along the length direction of the battery box.

[0012] In one embodiment, the length of the frame plate extending along the length direction of the battery box is greater than the length of the middle plate extending along the length direction of the battery box.

[0013] In one embodiment, the battery box further includes a plurality of partition beams, each of which is connected to a plurality of intermediate plates, and the plurality of partition beams and the plurality of intermediate plates are arranged intersectingly.

[0014] In one embodiment, the battery box includes a plurality of battery cavities, each of the battery cavities having a boundary including two of the partition beams and at least one of the intermediate plates, and / or each of the battery cavities having a boundary including two of the partition beams and at least one of the frame plates.

[0015] In one embodiment, a plurality of the partition beams are configured to be spaced apart along the length of the battery box, and the partition beams are configured to be deformable along the length of the battery box.

[0016] Secondly, embodiments of the present invention provide a battery pack, the battery pack including a battery box and a plurality of batteries, the plurality of batteries being disposed within the battery box, the battery box being configured as described above.

[0017] Thirdly, embodiments of this utility model provide an electrical device, which includes a battery pack as described above, or a battery box as described above.

[0018] The beneficial effects of the embodiments of this utility model are as follows:

[0019] In an embodiment of this utility model, each frame plate is configured as an integrally formed frame side beam and frame bottom plate, and each intermediate plate is configured as an integrally formed intermediate side beam and intermediate bottom plate. The two frame plates and at least one intermediate plate are spliced ​​together along a first direction to form a battery cavity. The intermediate bottom plate is connected to the frame bottom plate of the frame plate to form the bottom of the battery cavity, thereby eliminating the welding process between multiple intermediate side beams and the frame side beams and bottom plate of the battery box, thereby improving the airtightness of the battery box. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the battery box provided in an embodiment of the present invention;

[0022] Figure 2 This is an exploded structural diagram of the battery box provided in an embodiment of this utility model;

[0023] Figure 3 This is a three-dimensional schematic diagram of the frame plate provided in an embodiment of this utility model;

[0024] Figure 4 This is a three-dimensional schematic diagram of the intermediate plate provided in an embodiment of this utility model.

[0025] Icon labels:

[0026] 100. Battery box; 110. Battery cavity; 111. First battery slot; 112. Second battery slot; 120. Electrical cavity;

[0027] 1. Frame panel; 11. Left frame panel; 12. Right frame panel; 13. Side beam of the frame; 14. Bottom plate of the frame;

[0028] 2. Intermediate plate; 21. Intermediate side beam section; 22. Intermediate bottom plate section; 221. First part; 222. Second part; 23. First intermediate plate; 24. Second intermediate plate; 25. Third intermediate plate;

[0029] 3. Dividing beam; 31. First dividing beam; 32. Second dividing beam; 33. Third dividing beam; 34. Insertion port;

[0030] 4. Panel frame; Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0032] Embodiments of this application provide a battery pack comprising a battery box and multiple batteries, the multiple batteries being housed within the battery box. This battery pack can be a power battery pack or an energy storage battery pack. The power battery pack is used in electric equipment, such as an electric vehicle or a power tool. The energy storage battery pack is used in energy storage equipment.

[0033] The battery box includes multiple battery compartments, each of which is configured to house one battery. Each battery may include multiple individual battery cells, which may be cylindrical or prismatic.

[0034] In related technologies, the battery box includes a base plate, side frame beams and multiple intermediate side beams. The side frame beams and multiple intermediate side beams need to be welded to the base plate to form a grid-shaped battery cavity structure. The connection between the side frame beams and multiple intermediate side beams and the base plate forms multiple welding areas. These welding areas are prone to burn-through, which can lead to air leakage in the battery box.

[0035] An embodiment of this application provides a battery box 100, such as... Figure 1 and Figure 2 The diagram shows the structure of the battery box 100 after the cover is removed. (Refer to...) Figures 1 to 3 The battery box 100 includes two side panels 1 and at least one intermediate panel 2. For example... Figure 3 As shown, each frame plate 1 includes an integrally formed frame side beam portion 13 and a frame bottom plate portion 14, with the frame bottom plate portion 14 bent and connected to one side of the frame side beam portion 13. Figure 4 As shown, each intermediate plate 2 includes an integrally formed intermediate side beam portion 21 and an intermediate bottom plate portion 22. The intermediate side beam portion 21 is bent and connected between the two sides of the intermediate bottom plate portion 22. The two side plates 1 and at least one intermediate plate 2 are spliced ​​along a first direction to form a battery cavity 110. The intermediate bottom plate portion 22 is connected to the side plate bottom plate portion 14 to form the bottom of the battery cavity 110. The first direction is set as the width direction of the battery box 100.

[0036] By setting each frame plate 1 as an integrally formed frame side beam portion 13 and frame bottom plate portion 14, and setting each intermediate plate 2 as an integrally formed intermediate side beam portion 21 and intermediate bottom plate portion 22, the two frame plates 1 and at least one intermediate plate 2 are spliced ​​together along the first direction to form a battery cavity 110. The intermediate bottom plate portion 22 is connected to the frame bottom plate portion 14 of the frame plate 1 to form the bottom plate of the battery box 100, thereby eliminating the welding process between the multiple intermediate side beams and the frame side beams and the bottom plate of the battery box 100, thereby improving the airtightness of the battery box 100.

[0037] In some embodiments, such as Figure 2 and Figure 4As shown, the battery cavity 110 includes a first battery slot 111 and a second battery slot 112 adjacent to each other. The middle bottom plate portion 22 of the intermediate plate 2 includes a first part 221 and a second part 222. The first part 221 and the second part 222 of the middle bottom plate portion 22 are respectively disposed on both sides of the middle side beam portion 21. The first part 221 defines the first battery slot 111, and the second part 222 defines the second battery slot 112. By setting the middle bottom plate portion 22 of the intermediate plate 2 into two parts, it is convenient to combine and splice the middle bottom plate portion 22 of the intermediate plate 2 with the side frame bottom plate portion 14 of the left and right side frame plates 1 or the middle bottom plate portion 22 of another intermediate plate 2 to form the adjacent first battery slot 111 and second battery slot 112.

[0038] In one specific embodiment, reference continues to be made to Figure 4 The frame plate 1 is configured with an L-shaped structure, meaning that the frame bottom plate 14 is vertically connected to one side of the frame side beam 13. The middle plate 2 is configured with a T-shaped structure, meaning that the first part 221 and the second part 222 of the middle bottom plate 22 are respectively vertically connected to both sides of the middle side beam 21. The connection method between the first part 221 or the second part 222 of the middle bottom plate 2 and the frame bottom plate 14 can be one or more of welding, bonding, snap-fitting, and magnetic attraction.

[0039] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the battery box 100 includes a plurality of intermediate plates 2, the plurality of intermediate plates 2 including a first intermediate plate 23 and a second intermediate plate 24. The first part 221 of the intermediate bottom plate portion 22 of the first intermediate plate 23 is connected to the frame bottom plate portion 14 of the frame plate 1, and the second part 222 of the intermediate bottom plate portion 22 of the first intermediate plate 23 is connected to the first part 221 of the intermediate bottom plate portion 22 of the second intermediate plate 24.

[0040] By connecting the first portion 221 of the middle bottom plate portion 22 of the first intermediate plate 23 to the side plate bottom plate portion 14 of the side plate 1 located on the left side of the first intermediate plate 23, and connecting the second portion 222 of the middle bottom plate portion 22 of the first intermediate plate 23 to the first portion 221 of the middle bottom plate portion 22 of the second intermediate plate 24 located on the right side of the first intermediate plate 23, the side plate 1, the first intermediate plate 23, and the second intermediate plate 24 are spliced ​​together to form at least three battery cavities 110 to accommodate multiple batteries.

[0041] In one specific embodiment, the battery box 100 includes two side panels 1, three intermediate panels 2, and a panel frame 4. The panel frame 4 is connected between the two side panels 1. The two side panels 1 are a left side panel 11 and a right side panel 12. The three intermediate panels 2 are a first intermediate panel 23, a second intermediate panel 24, and a third intermediate panel 25. The first part 221 of the middle bottom plate portion 22 of the first intermediate panel 23 is connected to the side bottom plate portion 14 of the left side panel 11. The second part 222 of the middle bottom plate portion 22 of the first intermediate panel 23 is connected to the first part 221 of the middle bottom plate portion 22 of the second intermediate panel 24. The second part 222 of the middle bottom plate portion 22 of the second intermediate panel 24 is connected to the first part 221 of the middle bottom plate portion 22 of the third intermediate panel 25. The second part 222 of the middle bottom plate portion 22 of the third intermediate panel 25 is connected to the side bottom plate portion 14 of the right side panel 12, so as to form four battery cavities 110 spliced ​​along the width direction of the battery box 100.

[0042] In some embodiments, the width of the first portion 221 of the intermediate bottom plate portion 22 extending along the width direction of the battery box is equal to the width of the second portion 222 extending along the width direction of the battery box. By constructing the first portion 221 and the second portion 222 of the intermediate bottom plate portion 22 of the intermediate plate 2 to have the same width, it is beneficial to blindly assemble the first portion 221 and the second portion 222 of the intermediate bottom plate portion 22 with the frame plate 1 and another intermediate plate 2, thereby improving assembly efficiency. The width direction of the battery box 100 is set as follows: Figure 1 y direction shown.

[0043] Understandably, by constructing the first portion 221 and the second portion 222 of the intermediate bottom plate portion 22 of the intermediate plate 2 to have the same width, the first portion 221 of the intermediate bottom plate portion 22 of each intermediate plate 2 defines a first battery cavity, and the second portion 222 of the intermediate bottom plate portion 22 of each intermediate plate 2 defines a second battery cavity. Since the length of the first portion 221 is equal to the length of the second portion 222, the structural strength of the first battery cavity formed by the first portion 221 of the intermediate bottom plate portion 22 of each intermediate plate 2 and the second battery cavity formed by the second portion 222 are basically the same, thus avoiding weak local structural strength of the battery box 100.

[0044] In some embodiments, the length of the middle side beam portion 21 of the middle plate 2 of the battery box 100 extending along the length direction of the battery box 100 is less than the length of the middle bottom plate portion 22 of the middle plate 2 extending along the length direction of the battery box 100, so as to allow a certain assembly gap to be reserved at both ends of the middle side beam portion 21 for splicing and assembly with the frame plate 1 or the partition beam 3. In a specific embodiment, a partition beam 3 is connected to both ends of each middle plate 2.

[0045] In some embodiments, continue to refer to Figure 1 and Figure 2 The battery box 100 includes two side panels 1 and a plurality of intermediate panels 2 disposed between the two side panels 1. The length of the intermediate panels 2 extending along the length direction of the battery box 100 is less than the length of the side panels 1 extending along the length direction of the battery box 100, so that the plurality of intermediate panels 2 are separated to form a plurality of battery cavities 110. In addition to forming the plurality of battery cavities 110, the two side panels 1 also form an electrical cavity 120, which is used to house electrical components. The length direction of the battery box 100 is configured as follows: Figure 1 As shown in the x-direction, the width direction of the battery box 100 is set as follows: Figure 1 y direction shown.

[0046] In one specific embodiment, an electrical cavity 120 is also provided on one side of the plurality of battery cavities 110. The boundary of the electrical cavity 120 includes a panel frame 4, two side frame plates 1 and a partition beam 3.

[0047] In some embodiments, the lengths of the plurality of intermediate plates 2 extending along the length direction of the battery box 100 are substantially the same, so that the lengths of the plurality of battery cavities 110 separated along the width direction of the battery box 100 are the same. The widths of the intermediate bottom plate portions 22 of two adjacent intermediate plates 2 may be the same or different. In a specific embodiment, the battery box 100 includes two opposing side frame plates 1 and a plurality of intermediate plates 2 located between the two side frame plates 1. The two side frame plates 1 include a left side frame plate 11 and a right side frame plate 12. The plurality of intermediate plates 2 include a first intermediate plate 23, a second intermediate plate 24, and a third intermediate plate 25 arranged sequentially along the width direction of the battery box 100. The left side frame plate 11 and the first intermediate plate 23 are connected to form a first battery cavity, the first intermediate plate 23 and the second intermediate plate 24 are connected to form a second battery cavity, and the second intermediate plate 24 and the third intermediate plate 25 are connected to form a third battery cavity. Wherein, the width of the middle bottom plate portion 22 of the first intermediate plate 23 is greater than the width of the middle bottom plate portion 22 of the second intermediate plate 24, the width of the middle bottom plate portion 22 of the third intermediate plate 25 is greater than the width of the middle bottom plate portion 22 of the second intermediate plate 24, and the width of the middle bottom plate portion 22 of the first intermediate plate 23 is equal to the width of the middle bottom plate portion 22 of the third intermediate plate 25, so that the width of the first battery cavity is equal to the width of the second battery cavity, and the width of the second battery cavity is equal to the width of the third battery cavity.

[0048] In some embodiments, the battery box 100 further includes a plurality of partition beams 3, each partition beam 3 being connected to a plurality of intermediate plates 2. The plurality of partition beams 3 and the plurality of intermediate plates 2 are arranged intersectingly to form a crisscrossing grid-shaped battery cavity structure within the battery box 100. In a specific embodiment, the partition beams 3 extend along the width direction of the battery box 100, and the plurality of partition beams 3 are spaced apart along the length direction of the battery box 100. The intermediate plates 2 extend along the length direction of the battery box 100, and the plurality of intermediate plates 2 are spaced apart along the width direction of the battery box 100. Each partition beam 3 is perpendicularly connected to the plurality of intermediate plates 2.

[0049] In some embodiments, the battery box 100 includes a plurality of battery cavities 110, each battery cavity 110 having a boundary comprising two partition beams 3 and at least one intermediate plate 2, and / or each battery cavity 110 having a boundary comprising two partition beams 3 and at least one side plate 1, thereby enabling the partition beams 3 and the intermediate plate 2 surrounding each battery to effectively resist the impact force generated by battery vibration. In a specific embodiment, the boundary of each battery cavity 110 includes two partition beams 3, one intermediate plate 2 and one side plate 1, or the boundary of each battery cavity 110 includes two partition beams 3 and two intermediate plates 2.

[0050] In some embodiments, a plurality of partition beams 3 are configured to be spaced apart along the length direction of the battery box 100, and the boundary of the length direction forming each battery cavity 110 includes two partition beams 3. Each partition beam 3 is configured to be deformable along the length direction of the battery box 100 so that the partition beam 3 can resist the deformation force generated by the expansion of the battery.

[0051] In one specific embodiment, the cavity of the partition beam 3 is provided with a honeycomb structure so that the partition beam 3 can produce elastic deformation along the length direction of the battery box 100.

[0052] In some embodiments, the plurality of intermediate plates 2 and the two side plates 1 are all configured as rigid beams, and the boundary defining the width direction of each battery cavity 110 includes an intermediate plate 2 and a side plate 1, or the boundary defining the width direction of each battery cavity 110 includes two intermediate plates 2, so as to resist the impact force generated by the battery due to vibration.

[0053] In some embodiments, the battery box 100 includes a plurality of partition beams 3. The number of partition beams 3 can be two, three, four, or more, and is not specifically limited in the embodiments of this application. In a specific embodiment, the battery box 100 includes three partition beams 3, namely a first partition beam 31, a second partition beam 32, and a third partition beam 33. The second partition beam 32 is located between the first partition beam 31 and the third partition beam 33. The first partition beam 31 and the third partition beam 33 are respectively connected to the two sides of a plurality of intermediate plates 2, and the second partition beam 32 is connected to the middle of the plurality of intermediate plates 2. The second partition beam 32 includes multiple segments, and two adjacent segments of the second partition beam 32 form an insertion port 34 for an intermediate plate 2 to be inserted.

[0054] Embodiments of this application also provide an electrical device that includes the aforementioned battery pack or battery box. The electrical device can be an electric vehicle or a power tool. The electric vehicle can be a pure electric vehicle or a hybrid vehicle.

[0055] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery box (100), characterized in that, include: Two side panels (1), each of the side panels (1) includes an integrally formed side beam portion (13) and a bottom plate portion (14), wherein the side beam portion (13) is bent and connected to one side of the bottom plate portion (14); At least one intermediate plate (2), each of the intermediate plates (2) includes an integrally formed intermediate side beam portion (21) and an intermediate bottom plate portion (22), wherein the intermediate side beam portion (21) is bent and connected between the two sides of the intermediate bottom plate portion (22); The two frame plates (1) and at least one intermediate plate (2) are spliced ​​together along a first direction to form a battery cavity (110), and the intermediate bottom plate (22) is connected to the frame bottom plate (14) to form the bottom of the battery cavity (110).

2. The battery box (100) according to claim 1, characterized in that, The battery cavity (110) includes a first battery slot (111) and a second battery slot (112) adjacent to each other. The middle bottom plate portion (22) of the middle plate (2) includes a first part (221) and a second part (222). The first part (221) and the second part (222) are respectively disposed on both sides of the middle side beam portion (21). The first part (221) defines the first battery slot (111), and the second part (222) defines the second battery slot (112).

3. The battery box (100) according to claim 2, characterized in that, The battery box (100) includes a plurality of intermediate plates (2), the plurality of intermediate plates (2) including a first intermediate plate (23) and a second intermediate plate (24), the first part (221) of the intermediate bottom plate portion (22) of the first intermediate plate (23) is connected to the side bottom plate portion (14) of the side plate (1), and the second part (222) of the intermediate bottom plate portion (22) of the first intermediate plate (23) is connected to the first part (221) of the intermediate bottom plate portion (22) of the second intermediate plate (24).

4. The battery box (100) according to claim 2 or 3, characterized in that, The width of the first part (221) extending along the width direction of the battery box (100) is equal to the width of the second part (222) extending along the width direction of the battery box (100).

5. The battery box (100) according to any one of claims 1 to 3, characterized in that, The length of the middle side beam portion (21) of the middle plate (2) extending along the length direction of the battery box (100) is less than the length of the middle bottom plate portion (22) of the middle plate (2) extending along the length direction of the battery box (100).

6. The battery box (100) according to any one of claims 1 to 3, characterized in that, The length of the frame plate (1) extending along the length direction of the battery box (100) is greater than the length of the middle plate (2) extending along the length direction of the battery box (100).

7. The battery box (100) according to claim 3, characterized in that, The battery box (100) also includes a plurality of partition beams (3), each of the partition beams (3) being connected to a plurality of intermediate plates (2), and the plurality of partition beams (3) and the plurality of intermediate plates (2) being arranged intersectingly.

8. The battery box (100) according to claim 7, characterized in that, The battery box (100) includes a plurality of battery cavities (110), each of the battery cavities (110) having a boundary including two of the partition beams (3) and at least one of the intermediate plates (2), and / or each of the battery cavities (110) having a boundary including two of the partition beams (3) and at least one of the side plate (1).

9. The battery box (100) according to claim 7, characterized in that, The plurality of the partition beams (3) are arranged at intervals along the length direction of the battery box (100), and the partition beams (3) are configured to deform along the length direction of the battery box (100).

10. A battery pack, characterized in that, The battery pack includes a battery case (100) and a plurality of batteries, wherein the plurality of batteries are disposed within the battery case (100), and the battery case (100) is configured as described in any one of claims 1 to 9.

11. An electrical appliance, characterized in that, The electrical device includes the battery pack as described in claim 10, or the electrical device includes the battery box (100) as described in any one of claims 1 to 9.

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