Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack, and relates to the field of lithium batteries, and the battery box specifically comprises a box cover and a box body. The box cover comprises a first plate body and two first surrounding plates, the two opposite sides of the first plate body in the first direction are connected with the two first surrounding plates respectively, and in other words, the box cover is arranged to be of a U-shaped structure. Correspondingly, the box body can be arranged to be of a U-shaped structure connected with the box cover, namely, the box body comprises a second plate body and two second surrounding plates, and the two opposite sides of the second plate body in the second direction are connected with the two second surrounding plates respectively. In order to achieve assembly of the box cover and the box body, the first plate body abuts against the second surrounding plate, and in order to guarantee stability and sealing performance after assembly, the second plate body is provided with two matching parts in a protruding mode, the matching parts are arranged at intervals in the first direction, the matching parts are matched with the first surrounding plate, and therefore assembly of the first surrounding plate and the second plate body is achieved. Therefore, based on the arrangement, the problem of space occupation is solved, and the volume utilization rate of the battery box is correspondingly improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, and in particular to a battery box and a battery pack. Background Art

[0002] In the field of battery pack manufacturing, the upper cover and the lower box body are generally fixed together by bolts, and the edge of the lower box body is usually designed as a flange edge that can be used to cooperate with the upper cover to facilitate the interaction with the sealing material to ensure good sealing performance.

[0003] However, the inventors have discovered that the use of a flange structure for sealing requires a certain amount of space to be reserved around the box to achieve sealing. This reduces the space available for installing battery cells within the battery pack, reducing the overall space utilization of the battery pack. Utility Model Content

[0004] The purpose of the present utility model is to provide a battery box and a battery pack, which can greatly reduce the space occupied by the seal, thereby correspondingly improving the internal space utilization of the battery box.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] In a first aspect, the present invention provides a battery box, comprising:

[0007] The box cover includes a first plate body and two first enclosing plates, wherein two opposite sides of the first plate body in a first direction are respectively connected to the two first enclosing plates;

[0008] The box body includes a second plate body and two second enclosing plates, and the second plate body is connected to the two second enclosing plates on two opposite sides in the second direction respectively;

[0009] The first plate body is supported on the second enclosure plate, and the second plate body is provided with two mating portions spaced apart along the first direction, and the mating portions are mated with the first enclosure plate;

[0010] The first direction and the second direction are perpendicular to each other.

[0011] In an optional embodiment, the mating portion includes an outer baffle and an inner baffle that are arranged opposite to each other in the first direction, and a receiving groove that cooperates with the first enclosure panel is formed between the outer baffle and the inner baffle.

[0012] In an optional embodiment, the second enclosure includes a plate portion and a wall portion both connected to the second plate body, and the wall portion is arranged around the plate portion; the inner baffle extends along the second direction and its two ends are respectively abutted against the two wall portions, and the outer baffle extends along the second direction and its two ends are respectively flush with the two plate portions.

[0013] In an optional embodiment, there is a gap between the outer baffle and the plate portion in the first direction, and the box body further includes two rubber blocking blocks, which are arranged on the second plate body and connected to the plate portion and the outer baffle.

[0014] In an optional embodiment, the box cover further includes two first sealing edges and a plurality of bolts, the first sealing edges are connected to the first plate body and to the two first enclosure panels, and the first sealing edges are connected to the wall portion via bolts.

[0015] In an optional embodiment, the first sealing edge includes a first sealing portion connected to the first plate body, two second sealing portions connected to the first enclosure, and the opposite ends of the first sealing portion are respectively connected to the two second sealing portions, and the end of the second sealing portion away from the first sealing portion is matched with the gap, and an avoidance groove is provided to cooperate with the rubber block.

[0016] In an optional embodiment, the battery box further includes two sealing rings, and the sealing rings are arranged between the first sealing edge and the wall portion.

[0017] In an optional embodiment, the box cover further includes a second sealing edge connected to the first enclosure, and the first enclosure cooperates with the accommodating groove through the second sealing edge.

[0018] In an optional embodiment, the distance between the second sealing edge and the bottom wall of the accommodating groove is in the range of 5-10 mm.

[0019] In a second aspect, the present invention provides a battery pack comprising the battery box of any one of the aforementioned embodiments and a plurality of battery modules arranged in the battery box.

[0020] The beneficial effects of the embodiments of the present utility model include:

[0021] The present application provides a battery box and a battery pack, which specifically includes a box cover and a box body. The box cover includes a first plate and two first panels, and the first plate is connected to the two first panels on opposite sides in the first direction, that is, the box cover is configured as a U-shaped structure. Correspondingly, the box body can also be configured as a U-shaped structure connected to the box cover, that is, the box body includes a second plate and two second panels, and the second plate is connected to the two second panels on opposite sides in the second direction. In order to achieve the assembly of the box cover and the box body, the first plate is abutted against the second panels, and in order to ensure stability and sealing after assembly, the second plate is protruding with two mating portions spaced apart along the first direction, and the mating portions are mated with the first panels, thereby achieving the assembly of the first panels and the second plate. Therefore, based on the above arrangement, the problem of space occupation is improved, and the volume utilization rate of the battery box is correspondingly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the battery box assembly provided by an embodiment of the present utility model;

[0024] Figure 2 A schematic diagram of an explosion of a battery box provided in an embodiment of the present utility model;

[0025] Figure 3 A schematic diagram of a battery box provided in an embodiment of the present utility model;

[0026] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the cross section at AA in the middle;

[0027] Figure 5 Another schematic diagram of a battery box provided by an embodiment of the present utility model;

[0028] Figure 6 The embodiment of the present invention provides Figure 4 Schematic diagram of the cross section at the middle BB;

[0029] Figure 7 A schematic diagram of a box provided in an embodiment of the present utility model;

[0030] Figure 8 Another schematic diagram of a battery box provided by an embodiment of the present utility model;

[0031] Figure 9 This is a schematic diagram of a box cover provided by an embodiment of the present utility model.

[0032] Icon: 10-battery box; 100-box cover; 110-first plate; 130-first enclosure; 150-first sealing edge; 151-first sealing part; 153-second sealing part; 155-avoidance groove; 190-second sealing edge; 300-box; 310-second plate; 330-second enclosure; 331-plate part; 333-wall part; 350-matching part; 351-inner baffle; 353-outer baffle; 355-accommodation groove; 500-rubber block; 700-sealing ring. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0038] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] Example

[0040] The present invention provides a battery pack, particularly a battery pack for heavy trucks. The battery pack includes a battery box 10 and a plurality of battery modules disposed within the battery box 10. The configuration of the battery box 10 significantly reduces the space occupied by the seal, thereby correspondingly improving the internal space utilization of the battery box 10.

[0041] The specific structures of the various components of the battery box 10 provided in this embodiment and the corresponding relationships between them will be described in detail below.

[0042] Figure 1 This is a schematic diagram of the assembly of the battery box 10 provided in an embodiment of the present utility model. Figure 2 For the exploded diagram of the battery box 10 provided in the embodiment of the present invention, please refer to Figure 1 and Figure 2 The present application provides a battery box 10 , which specifically includes a box cover 100 and a box body 300 .

[0043] The box cover 100 includes a first plate 110 and two first panels 130. The first plate 110 is connected to the two first panels 130 on two opposite sides in the first direction, that is, the box cover 100 is configured as a U-shaped structure. Correspondingly, the box body 300 can also be configured as a U-shaped structure connected to the box cover 100. That is, the box body 300 includes a second plate 310 and two second panels 330. The second plate 310 is connected to the two second panels 330 on two opposite sides in the second direction.

[0044] On the basis of the above, to achieve the assembly of the box cover 100 and the box body 300, the first plate 110 is abutted against the second enclosure 330. Moreover, to ensure stability and sealing after assembly, the second plate 310 is provided with two mating portions 350 spaced apart along the first direction. The mating portions 350 mate with the first enclosure 130, thereby achieving the assembly of the first enclosure 130 and the second plate 310. It is understandable that the mating portions 350 and the first enclosure 130 mate in a one-to-one correspondence, that is, the mating portions 350 and the first enclosure 130 located on the same side mate.

[0045] It should be noted that the first direction and the second direction are perpendicular to each other. In this embodiment, the first direction specifically refers to the width of the battery box 10; the second direction specifically refers to the length of the battery box 10. Therefore, based on the above configuration, the space occupation problem is improved, and the volume utilization of the battery box 10 is correspondingly improved.

[0046] See also Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of a battery box 10 provided in an embodiment of the present utility model. Figure 4 The embodiment of the present invention provides Figure 3 In some embodiments, the mating portion 350 includes an outer baffle 353 and an inner baffle 351 disposed opposite to each other in the first direction, and a receiving groove 355 is formed between the outer baffle 353 and the inner baffle 351 to cooperate with the first enclosure panel 130 .

[0047] This arrangement allows the first enclosure 130 to precisely mate with the receiving groove 355, improving both sealing and connection performance. To further enhance sealing performance, the receiving groove 355 can also be configured as a glue-filling groove to achieve a seal. In other embodiments, the mating portion 350 can also be configured as a snap-fitting protrusion, with the second enclosure 330 correspondingly provided with a snap-fitting groove that mates with the snap-fitting protrusion. This description will not be repeated herein.

[0048] It should be noted that the present application replaces the flange with the mating portion 350. By positioning the outer baffle 353 and inner baffle 351, the sealing space originally occupied 20-25 mm can be reduced to approximately 6 mm. Furthermore, it should be noted that in the present application, the outer baffle 353 and inner baffle 351 are formed by extruding aluminum from the second plate 310.

[0049] Further, see Figure 5 and Figure 6 In order to improve the matching performance, the box cover 100 also includes a second sealing edge 190 connected to the first enclosure 130, and the first enclosure 130 is matched with the accommodating groove 355 through the second sealing edge 190.

[0050] Furthermore, the distance between the second sealing edge 190 and the bottom wall of the receiving groove 355 is in the range of 5-10 mm. Based on this, when the glue is filled in, due to its fluidity, it contacts the receiving groove 355 and the second sealing edge 190, thereby achieving a more effective seal and a more stable connection between the box cover 100 and the box body 300.

[0051] In some embodiments, see Figure 7 To improve sealing performance, the second enclosure 330 includes a plate portion 331 and a wall portion 333, both connected to the second plate body 310. The wall portion 333 surrounds the plate portion 331. Furthermore, the inner baffle 351 extends along the second direction, with its ends respectively abutting against the two wall portions 333. The outer baffle 353 extends along the second direction, with its ends respectively flush with the two plate portions 331.

[0052] Based on the above-described dimensional configuration, the horizontal projection of the two second enclosure panels 330 and the two mating portions 350 can form a sealed quadrilateral structure. Accordingly, after the cover 100 and the housing 300 are assembled, a sealed rectangular parallelepiped structure is formed, thereby ensuring the sealing of the battery box 10.

[0053] Furthermore, when there is a gap between the outer baffle 353 and the plate portion 331 in the first direction, in order to prevent glue leakage, as shown in FIG. Figure 8 As shown, the box body 300 further includes two glue blocks 500, which are disposed on the second plate body 310 and connected to the plate portion 331 and the outer baffle 353. It is understood that the glue blocks 500 are sealed to the plate portion 331, the outer baffle 353 and the second plate body 310 at the same time, thereby preventing glue from overflowing.

[0054] To further enhance the stability of the connection between the box body 300 and the box cover 100, the box cover 100 further includes two first sealing edges 150 and a plurality of bolts. The first sealing edges 150 are connected to the first plate 110 and to the two first enclosure panels 130, i.e., the first sealing edges 150 are U-shaped. The U-shaped first sealing edges 150 are connected to the wall portion 333 via bolts.

[0055] To improve sealing, the battery case 10 further includes two sealing rings 700, which are disposed between the first sealing edge 150 and the wall portion 333. It is understood that the bolts sequentially pass through the first sealing edge 150, the sealing rings 700, and the wall portion 333 to form a seal. Furthermore, it is also understood that the sealing rings 700 herein are C-shaped.

[0056] In some embodiments, as Figure 9 As shown, the first sealing edge 150 includes a first sealing portion 151 connected to the first plate 110 and two second sealing portions 153 connected to the first enclosure 130. The first sealing portion 151 has two opposite ends connected to the two second sealing portions 153. The end of the second sealing portion 153 away from the first sealing portion 151 is fitted with a gap, allowing the second sealing portion 153 to be sealed and fixed by glue, further improving the sealing performance of the battery box 10. Furthermore, the second sealing portion 153 is provided with an avoidance groove 155 that cooperates with the glue block 500 to prevent the glue block 500 from interfering with assembly.

[0057] Taking the battery box 10 provided herein as an example, the installation steps and process for the battery box 10 are as follows: Place the box body 300 on a workbench and place the sealing ring 700 on the wall 333 of the second enclosure 330. Next, place the box cover 100, inserting the first sealing edge 150 and the second sealing edge 190 into the receiving groove 355, avoiding the rubber block 500. Next, use bolts to penetrate the first sealing edge 150 and the sealing ring 700 in sequence to connect them to the second enclosure 330. Finally, fill the receiving groove 355 with glue.

[0058] In summary, the present application provides a battery box 10 and a battery pack, wherein the battery box 10 specifically includes a box cover 100 and a box body 300. The box cover 100 includes a first plate 110 and two first panels 130, and the first plate 110 is connected to the two first panels 130 on two opposite sides in the first direction, that is, the box cover 100 is configured as a U-shaped structure. Correspondingly, the box body 300 can also be configured as a U-shaped structure connected to the box cover 100, that is, the box body 300 includes a second plate 310 and two second panels 330, and the second plate 310 is connected to the two second panels 330 on two opposite sides in the second direction. To assemble the cover 100 and the box body 300, the first plate 110 abuts against the second enclosure 330. To ensure stability and sealing after assembly, the second plate 310 is provided with two mating portions 350 spaced along the first direction. The mating portions 350 mate with the first enclosure 130 to assemble the first enclosure 130 and the second plate 310. This arrangement alleviates the problem of space occupation and correspondingly improves the volume utilization of the battery box 10.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery box, characterized in that: include: A box cover (100), the box cover (100) comprising a first plate body (110) and two first enclosure plates (130), wherein the first plate body (110) is respectively connected to the two first enclosure plates (130) on two opposite sides in a first direction; A box body (300), the box body (300) comprising a second plate body (310) and two second enclosing plates (330), the second plate body (310) being connected to the two second enclosing plates (330) on two opposite sides in a second direction; The first plate (110) is supported on the second enclosure (330); the second plate (310) is provided with two mating portions (350) spaced apart along a first direction, and the mating portions (350) are mated with the first enclosure (130); Furthermore, the first direction and the second direction are perpendicular to each other.

2. The battery box according to claim 1, characterized in that: The matching portion (350) includes an outer baffle (353) and an inner baffle (351) arranged opposite to each other in the first direction, and a receiving groove (355) that matches the first enclosure plate (130) is formed between the outer baffle (353) and the inner baffle (351).

3. The battery box according to claim 2, characterized in that: The second enclosure plate (330) includes a plate portion (331) and a wall portion (333) both connected to the second plate body (310), wherein the wall portion (333) is arranged around the plate portion (331); the inner baffle plate (351) extends along the second direction and its two ends are respectively abutted against the two wall portions (333); the outer baffle plate (353) extends along the second direction and its two ends are respectively flush with the two plate portions (331).

4. The battery box according to claim 3, characterized in that: There is a gap between the outer baffle (353) and the plate portion (331) in the first direction. The box body (300) further comprises two rubber blocking blocks (500). The rubber blocking blocks (500) are arranged on the second plate body (310) and are connected to the plate portion (331) and the outer baffle (353).

5. The battery box according to claim 4, characterized in that: The box cover (100) further includes two first sealing edges (150) and a plurality of bolts, wherein the first sealing edges (150) are connected to the first plate body (110) and to the two first enclosure panels (130), and the first sealing edges (150) are connected to the wall portion (333) via the bolts.

6. The battery box according to claim 5, characterized in that: The first sealing edge (150) includes a first sealing portion (151) connected to the first plate body (110), two second sealing portions (153) connected to the first enclosure (130), and the two opposite ends of the first sealing portion (151) are respectively connected to the two second sealing portions (153), and the end of the second sealing portion (153) away from the first sealing portion (151) is matched with the gap, and an avoidance groove (155) is provided to match the rubber block (500).

7. The battery box according to claim 5, characterized in that: The battery box (10) further includes two sealing rings (700), and the sealing rings (700) are arranged between the first sealing edge (150) and the wall portion (333).

8. The battery box according to claim 2, characterized in that: The box cover (100) further includes a second sealing edge (190) connected to the first enclosure (130), and the first enclosure (130) cooperates with the accommodating groove (355) through the second sealing edge (190).

9. The battery box according to claim 8, characterized in that: The distance between the second sealing edge (190) and the bottom wall of the accommodating groove (355) is in the range of 5-10 mm.

10. A battery pack, characterized in that: It comprises a battery box (10) as claimed in any one of claims 1 to 9 and a plurality of battery modules arranged in the battery box (10).

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