Battery device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device which comprises a battery box body, a battery, a heat exchange plate and a reinforcing piece, the battery box body comprises a bottom plate, side frames and a beam connected between the side frames, and the bottom plate and the side frames form an accommodating space of the battery box body; the battery is at least partially positioned in the accommodating space of the battery box body; the heat exchange plate is positioned between the bottom plate and the battery; the reinforcing pieces are arranged on the heat exchange plates and fixedly connected with the beams. In the battery device provided by the invention, the reinforcing piece can increase the strength and rigidity of the heat exchange plate, and meanwhile, the heat exchange plate can be effectively fixed by utilizing the side frame through the reinforcing piece, so that the structural stability of the heat exchange plate is enhanced.

Description

Technical Field

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

[0002] A heat exchange plate is usually provided in a battery device, and the heat exchange plate is used to exchange heat with the battery. However, in the related art, the rigidity and strength of the heat exchange plate are relatively weak, and the heat exchange plate is easily damaged during movement or collision of the battery device.

[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 device, which can improve the technical problem of weak strength and rigidity of a heat exchange plate.

[0005] The battery unit includes:

[0006] A battery box, the battery box comprising a bottom plate, side frames, and a beam connected between the side frames, the bottom plate and the side frames forming a storage space for the battery box;

[0007] A battery, at least partially located in the receiving space of the battery box;

[0008] A heat exchange plate, located between the base plate and the battery;

[0009] The reinforcing member is arranged on the heat exchange plate, and the reinforcing member and the beam are fixedly connected.

[0010] On the one hand, the utility model adds a reinforcement piece to the heat exchange plate, which can increase the strength and rigidity of the heat exchange plate, thereby reducing the risk of deformation and damage of the heat exchange plate; on the other hand, the utility model fixes the reinforcement piece on the side frame, and the side frame can fix the heat exchange plate through the reinforcement piece, thereby increasing the stability of the heat exchange plate connection structure.

[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 device disclosed in the present invention;

[0015] Figure 2 An exploded view of a heat exchange plate in an exemplary embodiment of a battery device disclosed herein;

[0016] Figure 3 A bottom view of a heat exchange plate in an exemplary embodiment of a battery device disclosed herein;

[0017] Figure 4 The figure is a bottom view of a heat exchange plate and a reinforcement member in an exemplary embodiment of a battery device of the present disclosure.

[0018] Description of reference numerals:

[0019] 1. Battery box; 11. Bottom plate; 12. Side frame; 2. Battery; 3. Heat exchange plate; 31. First side plate; 32. Second side plate; 321. Protrusion; 33. Flow channel; 4. Reinforcement member. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figure 1-4 As shown, Figure 1 is a schematic structural diagram of an exemplary embodiment of a battery device disclosed herein. Figure 2 FIG. 1 is an exploded view of a heat exchange plate in an exemplary embodiment of a battery device disclosed herein. Figure 3 is a bottom view of a heat exchange plate in an exemplary embodiment of a battery device disclosed herein, Figure 4 The figure is a bottom view of a heat exchange plate and a reinforcement member in an exemplary embodiment of a battery device of the present disclosure.

[0025] The battery device includes: a battery box 1, a battery 2, a heat exchange plate 3, and a reinforcing member 4. The battery box 1 includes a bottom plate 11, a side frame 12, and a beam 13 connected between the side frames 12. The bottom plate 11 and the side frames 12 form a storage space for the battery box 1; the battery 2 is at least partially located in the storage space of the battery box 1; the heat exchange plate 3 is located between the bottom plate 11 and the battery 2; the reinforcing member 4 is arranged on the heat exchange plate 3, and the reinforcing member 4 and the beam 13 are fixedly connected.

[0026] On the one hand, this exemplary embodiment adds a reinforcement piece 4 to the heat exchange plate 3, which can increase the strength and rigidity of the heat exchange plate 3, thereby reducing the risk of deformation and damage of the heat exchange plate 3; on the other hand, this exemplary embodiment fixes the reinforcement piece 4 to the side frame 12, and the side frame 12 can fix the heat exchange plate 3 through the reinforcement piece 4, thereby increasing the stability of the connection structure of the heat exchange plate 3.

[0027] In this exemplary embodiment, the reinforcing member 4 and the beam 13 may be fixedly connected by bolts 6. The beam 13 may be connected between the two opposite side frames 12.

[0028] In this exemplary embodiment, Figure 1-4As shown, the reinforcing member 4 and the heat exchange plate 3 are separately provided, that is, the reinforcing member 4 and the heat exchange plate 3 are formed separately. The separately formed reinforcing member 4 and the heat exchange plate 3 can be fixedly connected by welding, gluing, etc. In this exemplary embodiment, the reinforcing member 4 and the heat exchange plate 3 can be welded by brazing, that is, a brazing material with a low melting point is arranged between the reinforcing member 4 and the heat exchange plate 3, and the reinforcing member 4 and the heat exchange plate 3 are firmly welded by the brazing material.

[0029] In this exemplary embodiment, the portion of the heat exchange plate 3 used for welding with the reinforcing member 4 can be made of the same material as the reinforcing member 4, which can facilitate welding of the reinforcing member 4 and the heat exchange plate 3. For example, the heat exchange plate 3 can be made of steel, aluminum, aluminum alloy or the like.

[0030] In this exemplary embodiment, the reinforcing member 4 may be a plate-shaped structure, and the plate surface of the reinforcing member 4 and the plate surface of the heat exchange plate 3 are arranged opposite to each other.

[0031] It should be understood that in other exemplary embodiments, the reinforcement member 4 and the heat exchange plate 3 can also be integrally formed. For example, the reinforcement member 4 and the heat exchange plate 3 can be formed by stamping or stretching a piece of plate. For another example, the reinforcement member 4 and the heat exchange plate 3 can also be integrally cast.

[0032] In this exemplary embodiment, Figure 1-4 As shown, the reinforcing member 4 can be arranged on the side of the heat exchange plate 3 away from the battery 2. The reinforcing member 4 located at the bottom of the heat exchange plate 3 can have a certain supporting effect on the heat exchange plate 3, so that this arrangement can improve the fixing effect of the reinforcing member 4 on the heat exchange plate 3.

[0033] In this exemplary embodiment, Figure 1-4 As shown, the heat exchange plate 3 includes two side plates arranged opposite to each other, and the two side plates include a first side plate 31 and a second side plate 32. The first side plate 31 is located between the battery 2 and the second side plate 32, and a flow channel 33 is formed between the first side plate 31 and the second side plate 32; the reinforcing member 4 is arranged on the largest side of the second side plate 32 away from the first side plate 31. The reinforcing member 4 can reinforce the largest side of the first side plate 31. It should be understood that in other exemplary embodiments, the reinforcing member 4 can also be arranged at other positions of the heat exchange plate 3, for example, the reinforcing member 4 can be arranged on the largest side of the first side plate 31 and / or the second side plate 32. Among them, the largest side of the second side plate 32 includes both the side away from the first side plate 31 and the side facing the first side plate 31; similarly, the largest side of the first side plate 31 includes both the side away from the second side plate 32 and the side facing the second side plate 32.

[0034] In the present exemplary embodiment, at least one of the first side plate 31 and the second side plate 32 is a flow channel plate.

[0035] In this exemplary embodiment, Figure 1-4 As shown, a concave flow channel 33 can be formed on the side of the second side plate 32 facing the first side plate 31 by a stamping process, and correspondingly, a protrusion 321 is formed on the side of the second side plate 32 away from the first side plate 31. In this exemplary embodiment, the reinforcing member 4 can be arranged on the side of the second side plate 32 away from the first side plate 31, that is, a groove structure matching the protrusion 321 is formed on the side of the reinforcing member 4 facing the second side plate 32. This arrangement can increase the contact area between the reinforcing member 4 and the second side plate 32, thereby improving the reinforcing effect of the reinforcing member 4 on the heat exchange plate 3.

[0036] It should be understood that in other exemplary embodiments, the reinforcing piece 4 can also be disposed conformally on the largest side of other side panels. For example, the reinforcing piece 4 can be disposed conformally on the largest side of the first side panel 31 and / or the second side panel 32 .

[0037] In this exemplary embodiment, Figure 1-4 As shown, the reinforcing member 4 only covers a portion of the largest side surface of the side plate. For example, the reinforcing member 4 covers a portion of the largest side surface of the first side plate 31, and / or the reinforcing member 4 covers a portion of the largest side surface of the second side plate 32. This arrangement can not only improve the strength and rigidity of the heat exchange plate 3, but also save the material of the reinforcing member and reduce the weight of the battery device.

[0038] In this exemplary embodiment, the ratio of the area of ​​the side panel covered by the reinforcing member 4 to the area of ​​the largest side of the side panel is 10%-15%. For example, the ratio of the area of ​​the side panel covered by the reinforcing member 4 to the area of ​​the largest side of the side panel can be equal to 10%, 11%, 12%, 13%, 14%, 15%, etc. If the ratio of the area of ​​the side panel covered by the reinforcing member 4 to the area of ​​the largest side of the side panel is too large, the area of ​​the reinforcing member 4 is too large, and the weight of the battery device is too large; if the ratio of the area of ​​the side panel covered by the reinforcing member 4 to the area of ​​the largest side of the side panel is too small, the area of ​​the reinforcing member 4 is too small, and the reinforcing effect of the reinforcing member 4 is not obvious. In this exemplary embodiment, the ratio of the area of ​​the side panel covered by the reinforcing member 4 to the area of ​​the largest side of the side panel is set to an appropriate size. This setting can not only ensure the reinforcing effect of the reinforcing member 4, but also save the material of the reinforcing member 4 and reduce the weight of the battery device.

[0039] In this exemplary embodiment, the reinforcing member 4 can be disposed at the edge region of the largest side of the side panel, for example, the reinforcing member 4 can be disposed at the edge region of the largest side of the first side panel 31 and / or the second side panel 32. The reinforcing member 4 can also be fixedly connected to the adjacent side frame.

[0040] like Figure 1-4As shown, the reinforcing piece 4 is arranged at the edge area of ​​the largest side of the second side plate 32. On the one hand, the reinforcing piece 4 located at the edge area is convenient for being fixedly connected with the side frame 12; on the other hand, the edge area of ​​the heat exchange plate 3 is prone to collision damage, and the reinforcing piece 4 located at the edge area of ​​the heat exchange plate 3 can prevent the edge area of ​​the heat exchange plate 3 from being damaged.

[0041] In this exemplary embodiment, Figure 1-4 As shown, the reinforcing piece 4 extends in the edge area of ​​the largest side of the side plate. For example, the reinforcing piece 4 may extend in the edge area of ​​the largest side of the first side plate 31 and / or the second side plate 32. The width S of the reinforcing piece 4 perpendicular to its extension direction is 55mm-125mm. For example, S may be equal to 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, etc. If the width S of the reinforcing piece 4 perpendicular to its extension direction is too large, the reinforcing piece 4 is prone to deformation, and the fixing effect of the reinforcing piece 4 on the heat exchange plate 3 is weak; if the width S of the reinforcing piece 4 perpendicular to its extension direction is too small, the reinforcing effect of the reinforcing piece 4 is not obvious. In this exemplary embodiment, the width S of the reinforcing member 4 perpendicular to its extension direction is set to a suitable size, which can ensure the reinforcing effect of the reinforcing member 4 and the fixing effect of the reinforcing member 4 on the heat exchange plate 3 at the same time.

[0042] In this exemplary embodiment, the reinforcing member 4 may be located at at least two opposite edge regions of the side plate, and this arrangement can achieve stable support of the heat exchange plate 3 by the reinforcing member 4. Figure 1-4 As shown, the reinforcing members 4 are located at three edge regions of the side plate.

[0043] In this exemplary embodiment, Figure 1-4 As shown, the reinforcing piece 4 covers at least part of the corner area of ​​the largest side surface of the side plate. For example, the reinforcing piece 4 covers at least part of the corner area of ​​the largest side surface of the first side plate 31, and / or, the reinforcing piece 4 covers at least part of the corner area of ​​the largest side surface of the second side plate 32. Covering the corner with the reinforcing piece is less likely to cause stress concentration, thereby improving the structural stability of the heat exchange plate.

[0044] In this exemplary embodiment, the heat transfer medium can circulate in the flow channel 33 to achieve heat exchange with the battery. In this exemplary embodiment, the heat exchange plate 3 can both cool down the battery and heat the battery. For example, when the temperature of the battery is high, the heat exchange plate 3 can cool the battery to improve the safety and stability of the battery pack; when the battery is in an extremely cold environment and the temperature is too low to affect normal use, the heat exchange plate 3 can heat the battery so that the battery pack can adapt to more usage environments.

[0045] 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.

[0046] 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.

[0047] In this exemplary embodiment, the battery can be a square battery, that is, the battery can be a quadrangular prism-type battery. The quadrangular prism-type 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.

[0048] 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.

[0049] The battery can be a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.

[0050] Alternatively, the battery may be a wound battery, that is, a first pole sheet, a second pole sheet with electrical properties opposite to the first pole sheet, and a diaphragm sheet arranged between the first pole sheet and the second pole sheet are wound to obtain a wound battery cell.

[0051] In this exemplary embodiment, the battery device is a battery module or a battery pack.

[0052] 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.

[0053] The battery pack includes a plurality of batteries and a box body, and the box body is used to fix the plurality of batteries.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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 device, characterized in that: The battery device comprises: A battery box (1), the battery box (1) comprising a bottom plate (11), side frames (12), and a beam (13) connected between the side frames (12), the bottom plate (11) and the side frames (12) forming a storage space for the battery box (1); A battery (2) is at least partially located in the accommodation space of the battery box (1); A heat exchange plate (3) located between the bottom plate (11) and the battery (2); A reinforcing member (4) is arranged on the heat exchange plate (3), and the reinforcing member (4) and the beam (13) are fixedly connected.

2. The battery device according to claim 1, characterized in that: The reinforcing member (4) and the heat exchange plate (3) are arranged separately or integrally.

3. The battery device according to claim 1, characterized in that: The reinforcing member (4) and the heat exchange plate (3) are arranged separately, and the reinforcing member (4) and the heat exchange plate (3) are connected by brazing.

4. The battery device according to claim 1, characterized in that: The reinforcing member (4) and the heat exchange plate (3) are arranged separately, and the reinforcing member (4) is arranged on a side of the heat exchange plate (3) facing away from the battery (2).

5. The battery device according to any one of claims 1 to 3, characterized in that: The heat exchange plate (3) comprises two side plates arranged opposite to each other, the two side plates comprising a first side plate (31) and a second side plate (32), the first side plate (31) being located between the battery (2) and the second side plate (32), and a flow channel (33) being formed between the first side plate (31) and the second side plate (32); The reinforcing piece (4) is arranged on the largest side surface of the first side plate (31) and / or the second side plate (32).

6. The battery device according to claim 5, characterized in that: The reinforcing piece (4) is arranged conformally on the largest side surface of the side plate.

7. The battery device according to claim 5, characterized in that: The reinforcing piece (4) covers a partial area of ​​the largest side surface of the side plate, and the ratio of the area of ​​the side plate covered by the reinforcing piece (4) to the area of ​​the largest side surface of the side plate is 10%-15%.

8. The battery device according to claim 5, characterized in that: The reinforcing piece (4) is arranged at the edge area of ​​the largest side surface of the side plate.

9. The battery device according to claim 8, characterized in that: The reinforcing piece (4) extends in the edge region of the largest side surface of the side plate, and the width of the reinforcing piece (4) perpendicular to its extension direction is 55 mm-125 mm.

10. The battery device according to claim 5, characterized in that: The reinforcing piece (4) covers at least a portion of the corner area of ​​the largest side surface of the side plate.

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