Battery box body and battery device

Abstract

The utility model relates to the technical field of batteries, and provides a battery box body and a battery device, the battery box body comprises a main box body, a runner plate and a lifting lug, the main box body comprises a bottom wall and a side wall which are integrally formed, and the bottom wall and the side wall form an accommodating space of the main box body; the runner plate is located on the side, away from the containing space, of the bottom wall, and a runner is formed between the runner plate and the bottom wall. The lifting lugs comprise the first lifting lug and the second lifting lug, the first lifting lug and the second lifting lug are distributed in the direction perpendicular to the bottom wall, the first lifting lug is fixedly connected to the side, away from the containing space, of the side wall, and the second lifting lug is fixedly connected to the runner plate; the orthographic projection of the first lifting lug on the plane where the bottom wall is located and the orthographic projection of the second lifting lug on the plane where the bottom wall is located are at least partially overlapped, and the overlapped part of the orthographic projection of the first lifting lug on the plane where the bottom wall is located and the overlapped part of the orthographic projection of the second lifting lug on the plane where the bottom wall is located are fixedly connected. The battery box body has a relatively simplified structure and relatively high assembly efficiency.

Description

Technical Field

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

[0002] In the related art, a heat exchange plate is generally provided inside the battery box. However, the heat exchange plate has a complex structure and is difficult to assemble.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] The utility model provides a battery box body, which can improve the technical problems of complex structure and difficult assembly of heat exchange plates.

[0005] According to one aspect of the present disclosure, a battery box includes:

[0006] A main box body, the main box body includes an integrally formed bottom wall and side walls, the bottom wall and the side walls forming a receiving space of the main box body;

[0007] A flow channel plate is located on a side of the bottom wall away from the accommodation space, and a flow channel is formed between the flow channel plate and the bottom wall;

[0008] The ear comprises a first ear and a second ear, the first ear and the second ear are distributed in a direction perpendicular to the bottom wall, the first ear is fixedly connected to the side of the side wall facing away from the accommodating space, the second ear is fixedly connected to the flow channel plate, the orthographic projection of the first ear on the plane where the bottom wall is located and the orthographic projection of the second ear on the plane where the bottom wall is located at least partially overlap, and the part of the first ear and the part of the second ear where the orthographic projections on the plane where the bottom wall are located overlap are fixedly connected.

[0009] On the one hand, the utility model forms a flow channel through the flow channel plate and the bottom wall of the main box body, that is, the utility model reuses the bottom wall of the main box body as a side plate of the heat exchange plate. This arrangement can simplify the structure of the battery box body and reduce the weight of the battery box body. On the other hand, the utility model forms a complete lifting ear by combining the first lifting ear and the second lifting ear. This arrangement can facilitate the assembly of the flow channel plate and the main box body and improve the structural stability of the lifting ear.

[0010] According to one aspect of the present disclosure, the utility model also provides a battery device, which includes the above-mentioned battery box.

[0011] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing.

[0013] in:

[0014] Figure 1 It is a structural schematic diagram of an exemplary embodiment of a battery box disclosed in the present invention;

[0015] Figure 2 for Figure 1 A partial cross-sectional view of the battery case along the dashed line AA is shown;

[0016] Figure 3 for Figure 1 A schematic diagram of the assembly structure of an exemplary embodiment of a battery device is shown.

[0017] Description of reference numerals:

[0018] 1. Main box body; 11. Bottom wall; 12. Side wall; 2. Accommodating space; 3. Flow channel plate; 31. Groove; 4. Flow channel; 5. Lifting ear; 51. First lifting ear; 52. Second lifting ear; 53. Lifting hole; 6. Buffer; 61. Bottom guard plate; 62. Elastic member. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0020] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0021] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0022] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to one or more "upper", "lower", or "inner", "outer" of another element, it can not only be directly connected to the "upper", "lower", "inner", "outer" of another element or elements, but can also be indirectly connected to the "upper", "lower", "inner", "outer" of another element or elements through an intermediate element.

[0023] like Figure 1-3 As shown, Figure 1 This is a schematic structural diagram of an exemplary embodiment of a battery box disclosed in the present invention. Figure 2 for Figure 1 The battery case is shown in a partial cross-sectional view along the dotted line AA. Figure 3 for Figure 1 Schematic diagram of the assembly structure of the battery device shown.

[0024] The battery case includes: a main case 1, a flow channel plate 3, and a lifting ear 5. The main case 1 includes an integrally formed bottom wall 11 and side wall 12, and the bottom wall 11 and the side wall 12 form a receiving space 2 of the main case 1; the flow channel plate 3 is located on the side of the bottom wall 11 away from the receiving space 2, and a flow channel 4 is formed between the flow channel plate 3 and the bottom wall 11; the lifting ear 5 includes a first lifting ear 51 and a second lifting ear 52, and the first lifting ear 51 and the second lifting ear 52 are distributed in a direction perpendicular to the bottom wall 11, the first lifting ear 51 is fixedly connected to the side of the side wall 12 away from the receiving space 2, and the second lifting ear 52 is fixedly connected to the flow channel plate 3, and the orthographic projection of the first lifting ear 51 on the plane where the bottom wall 11 is located and the orthographic projection of the second lifting ear 52 on the plane where the bottom wall 11 is located at least partially overlap, and the part of the first lifting ear 51 and the part of the second lifting ear 52 where the orthographic projections on the plane where the bottom wall 11 are overlapped are fixedly connected at the position where their orthographic projections overlap.

[0025] On the one hand, the present exemplary embodiment forms the flow channel 4 through the flow channel plate 3 and the bottom wall 11 of the main box body 1, that is, the present exemplary embodiment reuses the bottom wall 11 of the main box body as a side plate of the heat exchange plate. This arrangement can simplify the structure of the battery box body and reduce the weight of the battery box body. On the other hand, the present exemplary embodiment forms a complete lifting ear 5 by combining the first lifting ear 51 and the second lifting ear 52. This arrangement can facilitate the assembly of the flow channel plate and the main box body and improve the structural stability of the lifting ear.

[0026] It should be noted that the plane where the bottom wall 11 is located is the plane where the largest side of the bottom wall is located in the same plane. For example, when the bottom wall is a flat plate structure, the plane where the largest side of the bottom wall is located is the plane where the bottom wall is located; when the bottom wall is partially formed with protrusions or grooves on the basis of the flat plate structure, the plane where the bottom wall is located without protrusions or grooves is the plane where the bottom wall is located. The direction perpendicular to the bottom wall 11 is the direction perpendicular to the plane where the bottom wall 11 is located.

[0027] In this exemplary embodiment, the accommodation space 2 can be used to accommodate a battery, and the heat-conducting medium can circulate in the flow channel 4 to achieve heat exchange with the battery.

[0028] In this exemplary embodiment, Figure 1-3 As shown, the bottom wall 11 may be a flat plate structure, and a groove 31 is formed on the side of the flow channel plate 3 facing the bottom wall 11, and the groove 31 is used to form the flow channel 4. The bottom wall 11 is a flat plate structure, which can facilitate the integral molding of the main box body 1 and improve molding efficiency; the flow channel plate 3 is formed with a groove 31 on the side facing the bottom wall 11, so that a protrusion opposite to the groove 31 is formed on the side of the flow channel plate 3 away from the bottom wall 11, and the protrusion can be used as a reinforcing rib to improve the strength of the flow channel plate 3.

[0029] In this exemplary embodiment, Figure 1-3 As shown, a lifting hole 53 is formed on the lifting eye 5. The lifting eye 5 can be used to assemble the battery box to a target structure such as a vehicle through the lifting hole 53.

[0030] In this exemplary embodiment, Figure 1-3 As shown, the first lifting ear 51 can be integrally formed with the side wall 12, for example, the first lifting ear 51 and the side wall 12 can be integrally formed by a stamping process, a stretching process, etc. This arrangement can improve the assembly efficiency and overall strength of the first lifting ear 51 and the side wall 12. It should be understood that in other exemplary embodiments, the first lifting ear 51 and the side wall 12 can also be formed separately, that is, the first lifting ear 51 and the side wall 12 are two independent structures, and the first lifting ear 51 and the side wall 12 can be fixedly connected by welding, bolting, etc. The first lifting ear 51 and the side wall 12 that are separately arranged can have a more flexible assembly method.

[0031] In this exemplary embodiment, Figure 1-3As shown, the second lifting ear 52 can be integrally formed with the flow channel plate 3, for example, the second lifting ear 52 and the flow channel plate 3 can be integrally formed by a stamping process, a stretching process, etc. This arrangement can improve the assembly efficiency and overall strength of the second lifting ear 52 and the flow channel plate 3. It should be understood that in other exemplary embodiments, the second lifting ear 52 and the flow channel plate 3 can also be formed separately, and the second lifting ear 52 and the flow channel plate 3 can be fixedly connected by welding, bolting, etc.

[0032] In this exemplary embodiment, Figure 1-3 As shown, one or more of the main box body 1, the lifting lug 5, and the flow channel plate 3 are steel-aluminum composite structures or steel structures. That is, the main box body 1 can be a steel-aluminum composite structure or a steel structure, the lifting lug 5 can be a steel-aluminum composite structure or a steel structure, and the flow channel plate 3 can be a steel-aluminum composite structure or a steel structure, and the materials of any two of the main box body 1, the lifting lug 5, and the flow channel plate 3 can be the same or different. The steel-aluminum composite structure or the steel structure has a high strength, and this setting can increase the strength of the main box body 1, the lifting lug 5, and the flow channel plate 3.

[0033] In this exemplary embodiment, Figure 1-3 As shown, the wall thickness of the first hanging ear 51 is 1.5 mm to 2.0 mm. For example, the wall thickness of the first hanging ear 51 can be equal to 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc. In this exemplary embodiment, the wall thickness of the first hanging ear 51 is set to a suitable size, which can ensure the strength of the first hanging ear 51 and control the overall weight of the battery box.

[0034] In this exemplary embodiment, Figure 1-3 As shown, the thickness of the bottom wall 11 is 0.5mm to 2mm. For example, the thickness of the bottom wall 11 can be equal to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc. If the thickness of the bottom wall 11 is too large, the weight of the battery box will be too large; if the thickness of the bottom wall 11 is too small, the bottom wall 11 and the flow channel plate 3 will be easily welded through during welding, and the strength of the bottom wall 11 will be insufficient. In addition, if the thickness of the bottom wall 11 is too small, the bottom wall 11 will be easily broken when the battery explosion-proof valve is depressurized, thereby causing the heat-conducting medium in the flow channel to flow into the battery box, thereby causing a short circuit in the battery. In this exemplary embodiment, the thickness of the bottom wall 11 is set to a suitable size, which can ensure the structural stability of the battery box while reducing the weight of the battery box.

[0035] In this exemplary embodiment, Figure 1-3As shown, the thickness of the flow channel plate 3 is 0.5mm to 2mm. For example, the thickness of the flow channel plate 3 can be equal to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc. If the thickness of the flow channel plate 3 is too large, the weight of the battery box is too large; if the thickness of the flow channel plate 3 is too small, the flow channel plate 3 and the bottom wall 11 are easily welded through during welding, and the strength of the flow channel plate 3 is insufficient. In addition, if the thickness of the flow channel plate 3 is too small, the flow channel plate 3 is easily broken when the battery explosion-proof valve is depressurized, thereby causing the heat-conducting medium in the flow channel to flow into the battery box, thereby causing a short circuit in the battery. In this exemplary embodiment, the thickness of the flow channel plate 3 is set to a suitable size, which can ensure the structural stability of the battery box while reducing the weight of the battery box.

[0036] In this exemplary embodiment, Figure 1-3 As shown, the thickness of the side wall 12 is 0.5 mm to 3.5 mm. For example, the thickness of the side wall 12 can be equal to 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, etc. The side wall 12 is equipped with a lifting ear 5. In this exemplary embodiment, the thickness of the side wall 12 is set to a suitable size. This setting can ensure the strength of the side wall 12 while reducing the weight of the battery box.

[0037] In this exemplary embodiment, Figure 1-3 As shown, the flow channel plate 3 and the bottom wall 11 can be fixedly connected by welding, bonding, bolting, etc. For example, the flow channel plate 3 and the bottom wall 11 can be welded by laser welding, brazing, roller welding, etc. For another example, the flow channel plate 3 and the bottom wall 11 can be bolted, and accordingly, a sealing gasket can be added between the flow channel plate 3 and the bottom wall 11. In addition, the flow channel plate 3 and the bottom wall 11 can also be bonded by an adhesive. A sealed flow channel can be formed between the mutually fixed flow channel plate 3 and the bottom wall 11.

[0038] In this exemplary embodiment, Figure 1-3 As shown, the battery box also includes: a buffer 6, which is located on the side of the flow channel plate 3 away from the bottom wall 11. The buffer 6 can reduce the risk of the flow channel plate 3 being damaged by foreign objects. Figure 1-3As shown, the buffer member 6 may include a bottom guard plate 61 and an elastic member 62. The bottom guard plate 61 may be a steel structure or a steel-aluminum composite structure, and the elastic member 62 may be a rubber, sponge, etc. It should be understood that in other exemplary embodiments, the buffer member 6 may also be a honeycomb core plate, which includes an upper plate and a lower plate, a buffer space is spaced between the upper plate and the lower plate, and a partition rib with a honeycomb structure is provided in the buffer space.

[0039] This exemplary embodiment also provides a battery device, which includes the above-mentioned battery box and a battery, wherein the battery is located in the accommodating space 2 of the main box 1 .

[0040] It should be noted that a battery includes a cell and an electrolyte, and a battery is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, wherein the stacked portion includes a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged. The first pole sheet and the second pole sheet are coated with an active material.

[0041] In this exemplary embodiment, the battery may be a lithium-ion battery. It should be understood that in other exemplary embodiments, the battery may also be a nickel-cadmium battery, a nickel-metal hydride battery, a lithium polymer battery, a sodium-ion battery, a solid-state battery, etc.

[0042] In this exemplary embodiment, the battery can be a square battery, that is, the battery can be a quadrangular prism battery. The quadrangular prism battery mainly refers to a battery with a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0043] In other exemplary embodiments, the battery may be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end surfaces and a curved surface located between the two circular end surfaces.

[0044] The battery may be a wound battery, that is, a first pole piece, a second pole piece having electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a winding core.

[0045] In this exemplary embodiment, the battery device is a battery module or a battery pack.

[0046] The battery module includes a plurality of batteries, which may be square batteries, and the battery module may further include end plates and side plates, which are used to fix the plurality of batteries. The batteries may be cylindrical batteries, which may be arranged on a support plate to form a battery module.

[0047] The battery pack includes a plurality of batteries and a box body, and the box body is used to fix the plurality of batteries.

[0048] It should be noted that the battery pack includes a battery, and the battery may be multiple, and the multiple batteries are arranged in the box. Among them, the multiple batteries can be installed in the box after forming a battery module. Alternatively, the multiple batteries can be directly arranged in the box, that is, there is no need to group the multiple batteries, and the box is used to fix the multiple batteries.

[0049] It should be noted that the battery device proposed in the utility model can be used in various electrical devices, such as mobile phones, portable devices, laptops, various vehicles (such as battery cars, electric cars, etc.), ships, spacecraft, electric toys and electric tools, etc. Further, the above-mentioned spacecraft may include, for example, airplanes, rockets, space shuttles and spacecrafts. The above-mentioned electric toys may include, for example, fixed or mobile electric toys (such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.). The above-mentioned electric tools may include, for example, metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, specifically, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers. It should be understood that in various possible embodiments that conform to the design concept of the utility model, the cylindrical battery or battery device proposed in the utility model is not limited to the above-described devices, but can also be applied to all devices using batteries. For the sake of simplicity, the various embodiments in this specification are described by taking vehicles as an example.

[0050] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing what is disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and embodiments are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.

[0051] The drawings in the present disclosure only relate to the structures involved in the present disclosure, and other structures may refer to the usual design. In the absence of conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other to obtain new embodiments. It should be understood by those of ordinary skill in the art that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and should be included in the scope of the claims of the present disclosure.

[0052] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery box, characterized in that: The battery box comprises: A main box body (1), the main box body (1) comprising an integrally formed bottom wall (11) and a side wall (12), the bottom wall (11) and the side wall (12) forming a receiving space (2) of the main box body (1); A flow channel plate (3) is located on a side of the bottom wall (11) facing away from the accommodating space (2), and a flow channel (4) is formed between the flow channel plate (3) and the bottom wall (11); A lifting ear (5), the lifting ear (5) comprising a first lifting ear (51) and a second lifting ear (52), the first lifting ear (51) and the second lifting ear (52) being distributed in a direction perpendicular to the bottom wall (11), the first lifting ear (51) being fixedly connected to a side of the side wall (12) facing away from the accommodating space (2), the second lifting ear (52) being fixedly connected to the flow channel plate (3), the orthographic projection of the first lifting ear (51) on the plane where the bottom wall (11) is located and the orthographic projection of the second lifting ear (52) on the plane where the bottom wall (11) is located at least partially overlap, and the portion of the first lifting ear (51) and the portion of the second lifting ear (52) where the orthographic projections on the plane where the bottom wall (11) are overlapped are fixedly connected.

2. The battery box according to claim 1, characterized in that: The bottom wall (11) is a flat plate structure, and a groove (31) is formed on a side of the flow channel plate (3) facing the bottom wall (11), and the groove (31) is used to form the flow channel (4).

3. The battery box according to claim 1, characterized in that: A lifting hole (53) is formed on the lifting ear (5).

4. The battery box according to claim 1, characterized in that: The first lifting ear (51) and the side wall (12) are integrally formed, or the first lifting ear (51) and the side wall (12) are separately formed.

5. The battery box according to claim 1, characterized in that: The second lifting ear (52) and the flow channel plate (3) are integrally formed, or the second lifting ear (52) and the flow channel plate (3) are separately formed.

6. The battery case according to any one of claims 1 to 5, characterized in that: One or more of the main box body (1), the lifting lug (5), and the flow channel plate (3) is a steel-aluminum composite structure or a steel structure.

7. The battery case according to any one of claims 1 to 5, characterized in that: The wall thickness of the first lifting ear (51) is 1.5 mm to 2.0 mm; The thickness of the bottom wall (11) is 0.5 mm to 2 mm; The thickness of the flow channel plate (3) is 0.5 mm to 2 mm; The thickness of the side wall (12) is 0.5 mm to 3.5 mm.

8. The battery case according to any one of claims 1 to 5, characterized in that: The flow channel plate (3) and the bottom wall (11) are fixedly connected by any one or more of welding, bonding, and bolt connection.

9. The battery case according to any one of claims 1 to 5, characterized in that: The battery box also includes: A buffer component is located on a side of the flow channel plate (3) facing away from the bottom wall (11).

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

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