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 plurality of batteries, a heat exchange plate and a partition beam, the battery box body comprises a bottom plate and a frame which are fixedly connected with each other, and the bottom plate and the frame form an accommodating space; the plurality of batteries are arranged in the accommodating space, and each battery comprises a bottom surface facing one side of the bottom plate, a top surface deviating from one side of the bottom plate, and a side surface connected between the top surface and the bottom surface; the heat exchange plate is arranged in the containing space, a heat conduction channel is formed in the heat exchange plate, and the largest side face of the heat exchange plate and at least one side face of the battery are oppositely arranged and make heat conduction contact; the partition beam is arranged in the accommodating space and fixed on the battery box body, the partition beam comprises a first side surface which extends along the extension direction of the partition beam and is intersected with the bottom plate, and an included angle of 85-95 degrees is formed between the first side surface and the maximum side surface of the heat exchange plate. The battery device has relatively high space utilization rate and strength.

Description

Technical Field

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

[0002] In the related art, the battery device includes a battery box and a battery located in the battery box. The battery box is generally provided with a partition beam and a longitudinal beam to improve the strength of the battery box. However, the partition beam and the longitudinal beam will occupy a large space inside the battery box, resulting in a low space utilization rate of the battery box and a low energy density 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 solve the technical problem of low space utilization of a battery box.

[0005] The battery unit includes:

[0006] A battery box, the battery box comprising a bottom plate and a frame fixedly connected to each other, the bottom plate and the frame forming a receiving space;

[0007] A plurality of batteries are arranged in the accommodation space, wherein the batteries include a bottom surface facing one side of the bottom plate, a top surface facing away from the bottom plate, and a side surface connected between the top surface and the bottom surface;

[0008] A heat exchange plate is arranged in the accommodation space, a heat conduction channel is formed in the heat exchange plate, and the largest side surface of the heat exchange plate and at least one side surface of the battery are arranged opposite to each other and in heat conduction contact;

[0009] The partition beam is arranged in the accommodating space and fixed on the battery box. The partition beam includes a first side extending along its extension direction and intersecting with the bottom plate. The first side and the maximum side of the heat exchange plate form an angle of 85°-95°.

[0010] The utility model only arranges a partition beam in the battery box, and no longitudinal beam is arranged. At the same time, the utility model arranges the heat exchange plate and the partition beam to intersect. The heat exchange plate can increase the overall strength of the battery box and control the temperature of the battery. In addition, this arrangement can also improve the space utilization inside the 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 the battery device disclosed in the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of a battery in an exemplary embodiment of the battery device disclosed in the present invention;

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

[0017] Figure 4 for Figure 1 The battery device is shown in a cross-sectional view along the dashed line BB.

[0018] Description of reference numerals:

[0019] 1. Battery box; 11. Bottom plate; 12. Frame; 2. Battery; 21. Bottom surface; 22. Top surface

[0020] 23. Side surface; 232. Second side surface; 233. Third side surface; 3. Heat exchange plate; 4. Partition beam; 41. First side surface. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figure 1 , 2 , 3, Figure 1 is a schematic structural diagram of an exemplary embodiment of a battery device disclosed herein. Figure 2 is a schematic diagram of the structure of a battery in an exemplary embodiment of the battery device disclosed herein, Figure 3 for Figure 1 The cross-sectional view of the battery device shown along the dashed line AA, Figure 4 for Figure 1 The battery device is shown in a cross-sectional view along the dashed line BB.

[0026] The battery device includes: a battery box 1, multiple batteries 2, a heat exchange plate 3, and a partition beam 4. The battery box 1 includes a bottom plate 11 and a frame 12 fixedly connected to each other, and the bottom plate 11 and the frame 12 form a storage space; multiple batteries 2 are arranged in the storage space, and the battery 2 includes a bottom surface 21 facing the bottom plate 11, a top surface 22 facing away from the bottom plate 11, and a side surface 23 connected between the top surface 22 and the bottom surface 21; the heat exchange plate 3 is arranged in the storage space, and a heat conduction channel is formed in the heat exchange plate 3, and the maximum side surface 31 of the heat exchange plate 3 and at least one side surface 23 of the battery 2 are arranged opposite to each other and in heat conduction contact; the partition beam 4 is arranged in the storage space and fixed on the battery box 1, and the partition beam 4 includes a first side surface 41 extending along its extension direction and intersecting with the bottom plate 11, and the first side surface 41 and the maximum side surface 31 of the heat exchange plate 3 form an angle, and the angle is 85°-95°.

[0027] In this exemplary embodiment, only a partition beam is provided in the battery box 1, and no longitudinal beam is provided. At the same time, in this exemplary embodiment, the heat exchange plate 3 and the partition beam 4 are intersected. The heat exchange plate 3 can increase the overall strength of the battery box and control the temperature of the battery 2. In addition, this arrangement can also improve the space utilization inside the battery box.

[0028] In this exemplary embodiment, the maximum side surface of the heat exchange plate 3 is in thermal contact with at least one side surface 23 of the battery 2, which may include direct contact between the maximum side surface of the heat exchange plate 3 and the side surface 23 of the battery 2, or indirect contact between the maximum side surface of the heat exchange plate 3 and the side surface 23 of the battery 2. The maximum side surface of the heat exchange plate 3 is in thermal contact with the side surface 23 of the battery 2, so that heat conduction can be achieved between the maximum side surface of the heat exchange plate 3 and the side surface 23 of the battery 2.

[0029] In this exemplary embodiment, the heat transfer medium can circulate in the heat transfer channel 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.

[0030] In this exemplary embodiment, the angle formed by the first side surface 41 and the maximum side surface of the heat exchange plate 3 can be equal to 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, 95°, etc.

[0031] In this exemplary embodiment, Figure 1-4 As shown, the battery 2 includes multiple side surfaces 23, including a second side surface 232 and a third side surface 233, the area of ​​the second side surface 232 is smaller than the area of ​​the third side surface 233, and the largest side surface and the second side surface 232 of the heat exchange plate 3 are arranged opposite to each other and in thermal contact. In this exemplary embodiment, the heat exchange plate 3 and the second side surface 232 with a smaller area in the battery are arranged opposite to each other, and the heat exchange plate 3 can exchange heat with the second side surface 232 with a smaller area. The heat exchange amount between the second side surface 232 with a small area and the heat exchange plate 3 is limited, and this arrangement can improve the uniformity of the overall temperature of the battery, and avoid the battery cycle life being affected by the excessive temperature difference between the large side surface and the small side surface.

[0032] In this exemplary embodiment, Figure 1-4As shown, 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, but can be arc transitions. Accordingly, the battery 2 can include two second side surfaces 232 arranged oppositely and two third side surfaces 233 arranged oppositely.

[0033] In this exemplary embodiment, Figure 1-4 As shown, the thickness of the heat exchange plate 3 is 3mm-10mm. For example, the thickness of the heat exchange plate 3 can be equal to 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. The thickness of the heat exchange plate 3 is the size of the heat exchange plate 3 in the direction perpendicular to its maximum side. If the thickness of the heat exchange plate 3 is too small, the space for setting the heat conduction channel inside the heat exchange plate 3 is small, and the heat exchange efficiency of the heat exchange plate 3 is low. At the same time, if the thickness of the heat exchange plate 3 is too small, the overall strength of the battery box is too low; if the thickness of the heat exchange plate 3 is too large, the heat exchange plate 3 occupies too much space inside the battery box, the space utilization rate of the battery box is too low, and the energy density of the battery device is too low. In this exemplary embodiment, the thickness of the heat exchange plate 3 is set to an appropriate size. This setting can not only ensure the heat exchange efficiency of the heat exchange plate 3 and the strength of the battery box, but also improve the space utilization rate of the battery device.

[0034] In this exemplary embodiment, Figure 1-4 As shown, the thickness of the heat exchange plate 3 is d1, the battery device includes n1 heat exchange plates 3, the dimension of the partition beam 4 in the second direction is d2, the second direction is perpendicular to the first side surface 41, and the battery device includes n2 partition beams 4; wherein (n1*d1) / (n2*d2) is 0.8-50. For example, (n1*d1) / (n2*d2) can be equal to 0.8, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 50, etc. If (n1*d1) / (n2*d2) is too small, n1 is too small or d1 is too small, the heat exchange plate 3 has a poor overall heat exchange effect on the battery; if (n1*d1) / (n2*d2) is too large, n1 is too large or d1 is too large, the heat exchange plate 3 occupies a large space inside the battery box 1, resulting in a low space utilization rate of the battery box and a low energy density of the battery device. In this exemplary embodiment, (n1*d1) / (n2*d2) is set to a suitable size, which can not only improve the energy density of the battery device, but also ensure the heat exchange effect of the heat exchange plate 3 on the battery.

[0035] In this exemplary embodiment, Figure 1-4As shown, a cavity may be formed in the partition beam 4, and the thickness of the side wall where the first side surface 41 is located is 1.5mm-3mm. For example, the thickness of the side wall where the first side surface 41 is located may be equal to 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, etc. If the thickness of the side wall where the first side surface 41 is located is too small, the strength of the partition beam 4 is small, and the overall strength of the battery box is small; if the thickness of the side wall where the first side surface 41 is located is too large, the side wall where the first side surface 41 is located needs to consume more materials, and the partition beam 4 will also occupy more space in the battery box. In this exemplary embodiment, the thickness of the side wall where the first side surface 41 is located is set to a suitable size, which can not only ensure the strength of the partition beam 4, but also reduce the consumables of the partition beam 4 and improve the space utilization of the battery box.

[0036] In this exemplary embodiment, Figure 1-4 As shown, the angle formed by the first side surface 41 and the largest side surface of the heat exchange plate may be 90°.

[0037] In this exemplary embodiment, Figure 1-4 As shown, the maximum side of the heat exchange plate 3 intersects with the bottom plate 11, and the thickness of the side wall where the maximum side of the heat exchange plate 3 is located is 0.1mm-0.8mm. For example, the thickness of the side wall where the maximum side of the heat exchange plate 3 is located can be equal to 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc. If the thickness of the side wall where the maximum side of the heat exchange plate 3 is located is too small, the strength of the heat exchange plate 3 itself is small, and the overall strength of the battery box is small; if the thickness of the side wall where the maximum side of the heat exchange plate 3 is located is too large, the cross-section of the heat conduction channel is small, the flow rate of the heat conduction medium in the heat conduction channel is small, and the heat exchange speed between the heat exchange plate 3 and the battery is slow. In this exemplary embodiment, the thickness of the side wall where the maximum side of the heat exchange plate 3 is located is set to an appropriate size. This setting can not only ensure the overall strength of the battery box, but also improve the heat exchange effect of the heat exchange plate 3 on the battery.

[0038] In this exemplary embodiment, Figure 1-4As shown, the height h of the heat exchange plate 3 in the direction perpendicular to the bottom plate 11 is 80mm-120mm. For example, the height h of the heat exchange plate 3 in the direction perpendicular to the bottom plate 11 can be equal to 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, etc. If h is too small, the heat exchange area between the heat exchange plate 3 and the battery is small, and the heat exchange efficiency between the heat exchange plate and the battery is low; if h is too large, the heat exchange plate 3 will occupy a larger space inside the battery box, resulting in a low space utilization rate of the battery box. In this exemplary embodiment, h is set to a suitable size, which can ensure the heat exchange speed between the heat exchange plate 3 and the battery 2, and at the same time ensure the space utilization rate of the battery box 1.

[0039] In this exemplary embodiment, Figure 1-4 As shown, the partition beam 4 can be fixed to the bottom plate 11 and / or the frame 12. The heat exchange plate 3 can be fixed to the partition beam 4 and / or the battery box 1. For example, the heat exchange plate 3 can be fixed to the partition beam 4 and the frame 12. In addition, the heat exchange plate 3 can also be fixed to the bottom plate 11. In this exemplary embodiment, the heat exchange plate 3 can be fixed to the partition beam 4 and / or the battery box 1 by means of adhesives, bolts, welding, etc. Similarly, the partition beam 4 can also be fixed to the bottom plate 11 and / or the frame 12 by means of adhesives, bolts, welding, etc.

[0040] In this exemplary embodiment, Figure 1-4 As shown, the largest side surface of the heat exchange plate 3 may be perpendicular to the bottom plate 11 , and the first side surface 41 may be perpendicular to the bottom plate 11 .

[0041] The "parallel" and "perpendicular" mentioned in this application can not only be completely parallel or perpendicular, but also can have a certain error; for example, if the angle between the two is greater than or equal to 0° and less than or equal to 5°, the two are considered to be parallel to each other; if the angle between the two is greater than or equal to 85° and less than or equal to 95°, the two are considered to be perpendicular to each other.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] In this exemplary embodiment, the battery device is a battery module or a battery pack.

[0047] The battery module includes a plurality of batteries, and the batteries may be square batteries. The battery module may further include end plates and side plates, and the end plates and side plates are used to fix the plurality of batteries.

[0048] The battery pack includes a plurality of batteries and a box body, and the box body is used to fix the plurality of batteries.

[0049] 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.

[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 device, characterized in that: The battery device comprises: A battery box (1), the battery box (1) comprising a bottom plate (11) and a frame (12) fixedly connected to each other, the bottom plate (11) and the frame (12) forming a receiving space; A plurality of batteries (2) are arranged in the accommodation space, the batteries (2) comprising a bottom surface (21) facing the bottom plate (11), a top surface (22) facing away from the bottom plate (11), and a side surface (23) connected between the top surface (22) and the bottom surface (21); A heat exchange plate (3) is arranged in the accommodation space, a heat conduction channel is formed in the heat exchange plate (3), and the largest side surface of the heat exchange plate (3) and at least one side surface (23) of the battery (2) are arranged opposite to each other and in heat conduction contact; A partition beam (4) is arranged in the accommodating space and fixed on the battery box (1), the partition beam (4) comprising a first side surface (41) extending along its extension direction and intersecting with the bottom plate (11), the first side surface (41) and the maximum side surface of the heat exchange plate (3) forming an angle of 85°-95°.

2. The battery device according to claim 1, characterized in that: The battery (2) comprises a plurality of side surfaces (23), the plurality of side surfaces (23) of the battery (2) comprising a second side surface (232) and a third side surface (233), the area of ​​the second side surface (232) being smaller than the area of ​​the third side surface (233), and the largest side surface of the heat exchange plate (3) and the second side surface (232) being arranged opposite to each other and in thermal contact.

3. The battery device according to claim 2, characterized in that: The thickness of the heat exchange plate (3) is d1, the battery device comprises n1 heat exchange plates (3), the dimension of the partition beam (4) in the second direction is d2, the second direction is perpendicular to the first side surface (41), and the battery device comprises n2 partition beams (4); Among them, (n1*d1) / (n2*d2) is 0.8-50.

4. The battery device according to claim 2, characterized in that: The thickness of the heat exchange plate (3) is 3 mm-10 mm.

5. The battery device according to claim 3, characterized in that: A cavity is formed in the partition beam (4), and the thickness of the side wall where the first side surface (41) is located is 1.5 mm-3 mm.

6. The battery device according to any one of claims 1 to 5, characterized in that: The angle formed by the first side surface (41) and the largest side surface of the heat exchange plate (3) is 90°.

7. The battery device according to any one of claims 1 to 5, characterized in that: The largest side surface of the heat exchange plate (3) intersects with the bottom plate (11), and the thickness of the side wall where the largest side surface of the heat exchange plate (3) is located is 0.1 mm-0.8 mm.

8. The battery device according to claim 1, characterized in that: The height of the heat exchange plate (3) in a direction perpendicular to the bottom plate (11) is 80 mm-120 mm.

9. The battery device according to any one of claims 1 to 5, characterized in that: The heat exchange plate (3) is fixed on the partition beam (4) and / or the battery box (1).

10. The battery device according to any one of claims 1 to 5, characterized in that: The largest side surface of the heat exchange plate (3) is perpendicular to the bottom plate (11), and the first side surface (41) is perpendicular to the bottom plate (11).

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