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 body part and a runner part, the main body part is of a basin-shaped structure, a first accommodating space for accommodating a battery is formed in the main body part, and the main body part comprises a main body bottom plate; the flow channel part is of a basin-shaped structure, a second containing space is formed in the flow channel part, at least part of the main body part is located in the second containing space, the flow channel part comprises a flow channel bottom plate, the main body bottom plate and the flow channel bottom plate are oppositely arranged, and a flow channel is formed between the main body bottom plate and the flow channel bottom plate; a groove is formed in the side, facing the main body bottom plate, of the flow channel bottom plate, the groove is used for forming a flow channel, and the flow channel bottom plate is welded to the main body bottom plate through at least part of the area outside the groove. According to the arrangement, the main body part and the runner part can be conveniently welded, so that the production efficiency of the battery box body can be improved.

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, the battery device includes a heat exchange plate, which can perform heat exchange with the battery. However, the assembly of the heat exchange plate in the battery device is relatively complicated.

[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 problem of complex assembly of heat exchange plates.

[0005] The battery box includes:

[0006] The main body is a basin-shaped structure, the main body is formed with a first accommodation space for accommodating a battery, the main body of the basin-shaped structure forms an accommodation space for accommodating a battery, and the main body includes a main body bottom plate;

[0007] The flow channel portion is a basin-shaped structure, the flow channel portion is formed with a second accommodating space, the main body portion is at least partially located in the second accommodating space, the flow channel portion includes a flow channel bottom plate, and the main body bottom plate and the flow channel bottom plate are arranged opposite to each other, and a flow channel is formed between the main body bottom plate and the flow channel bottom plate;

[0008] A groove is formed on one side of the flow channel bottom plate facing the main body bottom plate, and the groove is used to form the flow channel. The flow channel bottom plate is welded to the main body bottom plate through at least a partial area outside the groove.

[0009] On the one hand, the utility model forms a flow channel between the main body bottom plate and the flow channel bottom plate, that is, the utility model reuses the main body bottom plate of the main body as a side plate of the heat exchange plate. This arrangement can simplify the structure of the battery box and reduce the weight of the battery box. On the other hand, the utility model arranges the flow channel part as a basin-shaped structure, and the main body is at least partially located in the accommodating space formed by the flow channel part. When the main body bottom plate and the flow channel bottom plate are welded, the solder will be confined in the accommodating space formed by the flow channel part, thereby avoiding the outflow of the solder and improving the welding efficiency of the main body and the flow channel part.

[0010] The utility model also provides a battery device, which comprises the battery box body mentioned above.

[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 This is a schematic diagram of the assembly structure of an exemplary embodiment of a battery box disclosed in the present invention;

[0016] Figure 3 for Figure 1 A cross-sectional view of the battery case along the dashed line AA is shown;

[0017] Figure 4 for Figure 3 An enlarged view of a local area B of the battery case shown;

[0018] Figure 5 It is a structural schematic diagram of the main body of an exemplary embodiment of a battery box disclosed in the present invention;

[0019] Figure 6 It is a schematic structural diagram of the flow channel portion in an exemplary embodiment of the battery case disclosed in the present invention.

[0020] Description of reference numerals:

[0021] 1. Main body; 11. Main body bottom plate; 12. Main body side plate; 13. Main body flange; 15. First accommodating space; 2. Flow channel; 21. Flow channel bottom plate; 211. Groove; 22. Flow channel side plate; 23. Flow channel flange; 25. Second accommodating space; 3. Flow channel; 4. Lifting part; 41. Reinforcement part; 411. First reinforcement part; 412. Second reinforcement part; 5. Lifting hole; 61. Support part; 62. Fixing part; 63. Connecting part; 7. Snap-fit ​​part; 71. Snap-fit ​​bottom plate; 72. Snap-fit ​​side plate; 75. Third accommodating space; 8. Bottom guard plate. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figure 1-6 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 This is a schematic diagram of the assembly structure of an exemplary embodiment of a battery box disclosed in the present invention. Figure 3 for Figure 1 The cross-sectional view of the battery case along the dotted line AA is shown. Figure 4 for Figure 3 The enlarged view of the local area B of the battery box is shown. Figure 5 This is a schematic structural diagram of the main body of an exemplary embodiment of a battery box disclosed in the present invention. Figure 6 It is a schematic structural diagram of the flow channel portion in an exemplary embodiment of the battery case disclosed in the present invention.

[0027] The battery case includes: a main body 1 and a flow channel portion 2. The main body 1 is a basin-shaped structure. The main body 1 forms a first accommodating space 15 for accommodating batteries. The main body 1 includes a main body bottom plate 11; the flow channel portion 2 is a basin-shaped structure. The flow channel portion 2 forms a second accommodating space 25. The main body 1 is at least partially located in the second accommodating space 25. The flow channel portion 2 includes a flow channel bottom plate 21, and the main body bottom plate 11 and the flow channel bottom plate 21 are arranged opposite to each other, and a flow channel 3 is formed between the main body bottom plate 11 and the flow channel bottom plate 21; a groove 211 is formed on the side of the flow channel bottom plate 21 facing the main body bottom plate 11, and the groove 211 is used to form the flow channel 3. The flow channel bottom plate 21 is welded to the main body bottom plate 11 through at least a partial area located outside the groove 211.

[0028] On the one hand, this exemplary embodiment forms a flow channel between the main body bottom plate and the flow channel bottom plate, that is, the utility model reuses the main body bottom plate of the main body as a side plate of the heat exchange plate. This arrangement can simplify the structure of the battery box and reduce the weight of the battery box. On the other hand, this exemplary embodiment arranges the flow channel part as a basin-shaped structure, and the main body is at least partially located in the accommodation space formed by the flow channel part. When the main body bottom plate and the flow channel bottom plate are welded, the solder will be confined in the accommodation space formed by the flow channel part, thereby avoiding the outflow of the solder and improving the welding efficiency of the main body and the flow channel part.

[0029] It should be noted that the basin-shaped structure is a structure having a bottom plate and side plates, wherein the side plates are arranged around the edge of the bottom plate so that the bottom plate and the side plates form a receiving space with an opening. The heat-conducting medium can circulate in the flow channel 3 to achieve heat exchange with the battery.

[0030] In this exemplary embodiment, the flow channel bottom plate 21 and the main body bottom plate 11 can be welded by brazing, resistance welding, laser welding, etc. The flow channel bottom plate 21 and the main body bottom plate 11 can be made of the same material to facilitate welding.

[0031] In this exemplary embodiment, Figure 1-6 As shown, the main body 1 may further include: a main body side plate 12 and a main body flange 13. The main body side plate 12 is connected to the main body bottom plate 11, and the main body side plate 12 and the main body bottom plate 11 form a first accommodation space; the main body flange 13 is connected to one end of the main body side plate 12 away from the main body bottom plate 11, and the main body flange 13 is located on the side of the main body side plate 12 away from the first accommodation space 15. The flow channel portion 2 may further include: a flow channel side plate 22 and a flow channel flange 23. The flow channel side plate 22 is connected to the flow channel bottom plate 21, and the flow channel side plate 22 and the flow channel bottom plate 21 form a second accommodation space; the flow channel flange 23 is connected to one end of the flow channel side plate 22 away from the flow channel bottom plate 21, and the flow channel flange 23 is located on the side of the flow channel side plate 22 away from the second accommodation space 25. Among them, the main body flange 13 and the flow channel flange 23 are arranged opposite to each other and fixedly connected.

[0032] In this exemplary embodiment, the main body flange 13 and the flow channel flange 23 can be welded, and / or the main body flange 13 and the flow channel flange 23 can be bolted. It should be understood that in other exemplary embodiments, the main body flange 13 and the flow channel flange 23 can also be connected by other fixed connection methods, for example, the main body flange 13 and the flow channel flange 23 can also be bonded, riveted, etc.

[0033] In this exemplary embodiment, Figure 1-6 As shown, the battery box also includes: a hanging part 4, which is used to fix the battery box to the target structure, and the hanging part 4 includes a main body flange 13 and a flow channel flange 23. That is, in this exemplary embodiment, at least part of the structure of the hanging part 4 can be formed by the main body flange 13 and the flow channel flange 23. This arrangement does not require the battery box to be separately provided with a hanging ear, thereby simplifying the structure of the battery box and improving the assembly efficiency of the battery box. In addition, the battery box can also have a better sealing effect.

[0034] In this exemplary embodiment, Figure 1-6 As shown, the hoisting part 4 may also include: a reinforcing part 41, the reinforcing part 41 is at least partially located on the side of the flow channel flange 23 away from the main body flange 13, and a hoisting hole 5 is formed on the reinforcing part 41 that penetrates the reinforcing part 41, the flow channel flange 23, and the main body flange 13. The stress of the reinforcing part 41 at the position of the hoisting hole 5 is relatively concentrated, and the reinforcing part 41 can strengthen the strength of the hoisting part 4 at the position of the hoisting hole 5, thereby preventing the hoisting part 4 from being damaged at the position of the hoisting hole 5. The hoisting part 4 can hoist the battery box to a target structure such as a vehicle through the hoisting hole 5. For example, the hoisting part 4 can hoist the battery box to the target structure using bolts that penetrate the hoisting hole 5.

[0035] In this exemplary embodiment, Figure 1-6 As shown, the hoisting part 4 includes a plurality of reinforcing parts 41, including a first reinforcing part 411, and the first reinforcing part 411 includes: a supporting part 61, a fixing part 62, and a connecting part 63. The supporting part 61 is located on the side of the flow channel bottom plate 21 away from the main body bottom plate 11; the fixing part 62 is located on the side of the flow channel flange 23 away from the main body flange 13, and the hoisting hole 5 is formed on the fixing part 62; the connecting part 63 is connected between the supporting part 61 and the fixing part 62. In this exemplary embodiment, the fixing part 62 can strengthen the strength of the hoisting part 4 at the position of the hoisting hole 5; the supporting part 61 can have a certain supporting effect on the flow channel bottom plate 21, thereby improving the overall strength of the battery box.

[0036] In this exemplary embodiment, Figure 1-6 As shown, the plurality of reinforcement portions 41 may further include a second reinforcement portion 412 . Compared with the first reinforcement portion 411 , the second reinforcement portion 412 has a smaller extension dimension, and the second reinforcement portion 412 may not be provided with a support portion.

[0037] In this exemplary embodiment, Figure 1-6 As shown, the battery case also includes: a snap-fitting part 7, the snap-fitting part 7 is a basin-shaped structure, the snap-fitting part 7 forms a third accommodating space 75, the open end of the snap-fitting part 7 is snap-fitted on the opening of the main body 1, and the snap-fitting part 7 may include: a snap-fitting bottom plate 71, a snap-fitting side plate 72, and a snap-fitting flange 73, the snap-fitting side plate 72 is connected to the snap-fitting bottom plate 71, and the snap-fitting side plate 72 and the snap-fitting bottom plate 71 form a third accommodating space; the snap-fitting flange 73 is connected to one end of the snap-fitting side plate 72 away from the snap-fitting bottom plate 71, and the snap-fitting flange 73 may be located on the side of the snap-fitting side plate 72 away from the third accommodating space 75, that is, the snap-fitting flange 73 is turned outward. Among them, the snap-fitting flange 73 may be fixedly connected to the main body flange 13. In this exemplary embodiment, the snap-fitting flange 73 may strengthen the overall strength of the hanging part 4, or in other words, the snap-fitting flange 73 may form a partial structure of the hanging part 4.

[0038] In this exemplary embodiment, Figure 1-6 As shown, the main body 1 is an integrally formed stamped part, and / or the flow channel part 2 is an integrally formed stamped part. An integrally formed stamped part has higher production efficiency, higher strength, and better sealing, so that this arrangement can improve the production efficiency, strength, and sealing of the battery box. In addition, the buckle part 7 can also be an integrally formed stamped part.

[0039] In this exemplary embodiment, Figure 1-6 As shown, the angle between the main body side plate 12 and the main body bottom plate 11 is greater than 90°; and / or, the angle between the flow channel side plate 22 and the flow channel bottom plate 21 is greater than 90°. In this exemplary embodiment, the main body 1 is configured as a basin-shaped structure with an opening expanding outward, so that the battery can be easily assembled into the box body, and in this exemplary embodiment, the flow channel 2 is configured as a basin-shaped structure with an opening expanding outward, so that the main body 1 can be easily assembled into the flow channel 2. In addition, the angle between the snap-fit ​​bottom plate 71 and the snap-fit ​​side plate 72 can also be greater than 90°, and this configuration can facilitate the snap-fitting of the snap-fitting portion 7 onto the main body 1.

[0040] In this exemplary embodiment, Figure 1-6 As shown, the battery box may further include a bottom guard plate 8 , and the bottom guard plate 8 may be used to protect the flow channel portion 2 .

[0041] In this exemplary embodiment, Figure 1-6 As shown, the main body 1, the flow channel 2, the buckling part 7, and the bottom guard plate 8 can be a steel structure or an aluminum structure.

[0042] The present exemplary embodiment also provides a battery device, which includes the above-mentioned battery case and a battery, wherein the battery is at least partially located in a space formed by the main body.

[0043] 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, the stacked portion including 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In this exemplary embodiment, the battery device is a battery module or a battery pack.

[0049] 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.

[0050] The battery pack includes a plurality of batteries and a box body, and the box body is used to fix the plurality of batteries.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 body (1), the main body (1) being a basin-shaped structure, the main body (1) being formed with a first accommodation space (15) for accommodating a battery, and the main body (1) comprising a main body bottom plate (11); A flow channel portion (2), the flow channel portion (2) being a basin-shaped structure, the flow channel portion (2) forming a second accommodating space (25), the main body portion (1) being at least partially located in the second accommodating space (25), the flow channel portion (2) comprising a flow channel bottom plate (21), the main body bottom plate (11) and the flow channel bottom plate (21) being arranged opposite to each other, and a flow channel (3) being formed between the main body bottom plate (11) and the flow channel bottom plate (21); A groove (211) is formed on a side of the flow channel bottom plate (21) facing the main body bottom plate (11), the groove (211) being used to form the flow channel (3), and the flow channel bottom plate (21) is welded to the main body bottom plate (11) via at least a portion of the area outside the groove (211).

2. The battery box according to claim 1, characterized in that: The main body (1) further comprises: A main body side plate (12) connected to the main body bottom plate (11), wherein the main body side plate (12) and the main body bottom plate (11) form the first accommodating space (15); A main body flange (13) connected to an end of the main body side plate (12) away from the main body bottom plate (11), and the main body flange (13) is located on a side of the main body side plate (12) away from the first accommodating space (15); The flow channel portion (2) further comprises: A flow channel side plate (22) connected to the flow channel bottom plate (21), wherein the flow channel side plate (22) and the flow channel bottom plate (21) form the second accommodation space (25); A flow channel flange (23) connected to an end of the flow channel side plate (22) away from the flow channel bottom plate (21), and the flow channel flange (23) is located on a side of the flow channel side plate (22) away from the second accommodation space (25); Wherein, the main body flange (13) and the flow channel flange (23) are arranged opposite to each other and fixedly connected.

3. The battery box according to claim 2, characterized in that: The main body flange (13) and the flow channel flange (23) are welded, and / or the main body flange (13) and the flow channel flange (23) are bolted.

4. The battery box according to claim 2, characterized in that: The battery box also includes: A hoisting part (4), the hoisting part (4) is used to fix the battery box body to a target structure, the hoisting part (4) comprises the main body flange (13) and the flow channel flange (23).

5. The battery box according to claim 4, characterized in that: The hoisting part (4) further comprises: A reinforcing portion (41), wherein the reinforcing portion (41) is at least partially located on a side of the flow channel flange (23) away from the main body flange (13), and a lifting hole (5) is formed on the reinforcing portion (41) and passes through the reinforcing portion (41), the flow channel flange (23), and the main body flange (13).

6. The battery case according to claim 5, characterized in that: The hoisting portion (4) comprises a plurality of reinforcing portions (41), wherein the plurality of reinforcing portions (41) comprises a first reinforcing portion (411), and the first reinforcing portion (411) comprises: A support portion (61) located on a side of the flow channel bottom plate (21) away from the main body bottom plate (11); A fixing portion (62) is located on a side of the flow channel flange (23) away from the main body flange (13), and the hanging hole (5) is formed on the fixing portion (62); The connecting portion (63) is connected between the supporting portion (61) and the fixing portion (62).

7. The battery box according to claim 2, characterized in that: The battery box further comprises: a buckling portion (7), the buckling portion (7) being a basin-shaped structure, the buckling portion (7) forming a third accommodating space (75), the opening end of the buckling portion (7) being buckled onto the opening of the main body (1), the buckling portion (7) comprising: Snap-fitting the bottom plate (71); A buckling side plate (72) connected to the buckling bottom plate (71), wherein the buckling side plate (72) and the buckling bottom plate (71) form the third accommodating space (75); A buckling flange (73) connected to one end of the buckling side plate (72) away from the buckling bottom plate (71), and the buckling flange (73) is located on a side of the buckling side plate (72) away from the third accommodating space (75); Wherein, the buckling flange (73) and the main body flange (13) are fixedly connected.

8. The battery case according to any one of claims 1 to 7, characterized in that: The main body (1) is an integrally formed stamped part, and / or the flow channel (2) is an integrally formed stamped part.

9. The battery case according to any one of claims 1 to 7, characterized in that: The main body (1) further comprises: A main body side plate (12) connected to the main body bottom plate (11), the main body side plate (12) and the main body bottom plate (11) intersect, and an angle between the main body side plate (12) and the main body bottom plate (11) is greater than 90°; And / or, the flow channel portion (2) further includes: The flow channel side plate (22) is connected to the flow channel bottom plate (21), the flow channel side plate (22) and the flow channel bottom plate (21) intersect, and the angle between the flow channel side plate (22) and the flow channel bottom plate (21) is greater than 90°.

10. A battery device, characterized in that: The battery device comprises a battery case and a battery as claimed in any one of claims 1 to 9, wherein the battery is at least partially located in a space formed by a main body.

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