Battery device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device which comprises a battery box, a battery pack and a bonding layer, and the battery box comprises a bottom plate; the battery pack is located in the battery box and comprises a plurality of battery columns and a supporting frame, and the supporting frame is located between the batteries and the bottom plate; wherein the plurality of battery columns are distributed in a first direction, each battery column comprises a plurality of batteries distributed along a second direction, and the first direction and the second direction intersect; the support frame comprises a support main body and a metal piece, a plurality of accommodating parts are formed on the support main body, the batteries are at least partially positioned in the accommodating parts, the metal piece is positioned on one side, facing the bottom plate, of the support main body, and the orthographic projection of the metal piece on the bottom plate is positioned between the orthographic projections of two adjacent battery columns on the bottom plate; the bonding layer is at least partially bonded between the metal piece and the bottom plate. According to the battery provided by the invention, the connection strength between the support frame and the bottom plate is relatively high.

Description

Technical Field

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

[0002] The battery device usually supports the battery through a support frame, and the support frame needs to be fixed on the bottom plate of the battery box. However, the connection strength between the support frame and the bottom plate of the battery box is low, which leads to poor structural stability of the battery inside the battery device, and the battery is easy to move inside 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 low connection strength between a support frame and a bottom plate of a battery box.

[0005] The battery unit includes:

[0006] A battery box, including a bottom plate;

[0007] A battery pack is located in the battery box, and the battery pack includes a plurality of battery columns and a support frame, and the support frame is located between the battery and the bottom plate;

[0008] Wherein, the plurality of battery columns are distributed in a first direction, the battery column includes a plurality of batteries distributed along a second direction, and the first direction and the second direction intersect;

[0009] The support frame includes a support body and a metal piece. A plurality of accommodating parts are formed on the support body. The batteries are at least partially located in the accommodating parts. The metal piece is located on a side of the support body facing the bottom plate, and the orthographic projection of the metal piece on the bottom plate is located between the orthographic projections of two adjacent battery rows on the bottom plate.

[0010] The bonding layer is at least partially bonded between the metal member and the base plate.

[0011] On the one hand, the utility model arranges a metal piece on the side of the support body facing the bottom plate, and the metal piece and the bottom plate have a high connection strength, so that this arrangement can enhance the connection strength between the support frame and the bottom plate; on the other hand, when the battery has thermal runaway, the support body is easy to burn, thereby causing the thermal runaway to spread. The orthographic projection of the metal piece on the bottom plate is arranged between the orthographic projections of two adjacent battery rows on the bottom plate, and the metal piece can serve as a flame retardant to block the spread of thermal runaway.

[0012] 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

[0013] 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.

[0014] in:

[0015] Figure 1 It is a structural schematic diagram of an exemplary embodiment of the battery device disclosed in the present invention;

[0016] Figure 2 It is a partial structural schematic diagram of an exemplary embodiment of the battery device disclosed in the present invention;

[0017] Figure 3 for Figure 2 A schematic structural diagram of the battery device from another perspective;

[0018] Figure 4 It is a schematic structural diagram of a support frame and a sealing member in an exemplary embodiment of a battery device disclosed in the present invention;

[0019] Figure 5 for Figure 4 A magnified image of the local area BB;

[0020] Figure 6 for Figure 5 An exploded view of the structure shown;

[0021] Figure 7 A schematic structural diagram of a support frame and a seal from another perspective in an exemplary embodiment of a battery device disclosed herein;

[0022] Figure 8 for Figure 7 A magnified image of the local area CC in the middle;

[0023] Fig. 9 for Figure 7 Exploded view of the structure shown.

[0024] Description of reference numerals:

[0025] 1. Battery box; 11. Bottom plate; 111. Pressure relief groove; 2. Battery pack; 3. Battery array; 31. Battery; 4. Support frame; 41. Support body; 411. Groove; 42. Metal part; 421. Main body; 422. Extension; 5. Accommodation part; 6. Adhesive layer; 71. First sealing member; 72. Second sealing member; 81. First annular step groove; 82. Second annular step groove; 43. Edge baffle. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1-9 As shown, Figure 1 is a schematic structural diagram of an exemplary embodiment of a battery device disclosed herein. Figure 2 It is a partial structural schematic diagram of an exemplary embodiment of the battery device disclosed in the present invention. Figure 3 for Figure 2 A schematic diagram of the structure of the battery device from another perspective, Figure 4 This is a schematic diagram of the structure of a support frame and a seal in an exemplary embodiment of a battery device disclosed in the present invention. Figure 5 for Figure 4 The enlarged image of the local area BB in the middle. Figure 6 for Figure 5 An exploded view of the structure shown, Figure 7 This is a schematic structural diagram of a support frame and a seal from another perspective in an exemplary embodiment of the battery device disclosed herein. Figure 8 for Figure 7 The enlarged image of the local area CC in the figure. Fig. 9 for Figure 7 Exploded view of the structure shown.

[0031] The battery device includes: a battery box 1, a battery pack 2, and an adhesive layer (not shown), wherein the battery box 1 includes a bottom plate 11; the battery pack 2 is located in the battery box 1, the battery pack 2 includes a plurality of battery columns 3 and a support frame 4, and the support frame 4 is located between the battery 31 and the bottom plate 11; wherein the plurality of battery columns 3 are distributed in a first direction X, the battery columns 3 include a plurality of batteries 31 distributed along a second direction Y, and the first direction X and the second direction Y intersect; the support frame 4 includes a support body 41 and a metal member 42, a plurality of accommodating portions 5 are formed on the support body 41, the battery 31 is at least partially located in the accommodating portions 5, the metal member 42 is located on a side of the support body 41 facing the bottom plate 11, and the orthographic projection of the metal member 42 on the bottom plate 11 is located between the orthographic projections of two adjacent battery columns 3 on the bottom plate 11; the adhesive layer is at least partially bonded between the metal member 42 and the bottom plate 11.

[0032] On the one hand, this exemplary embodiment arranges a metal part on the side of the support body facing the base plate, and the metal part and the base plate have a high connection strength, so that this arrangement can enhance the connection strength between the support frame and the base plate; on the other hand, when thermal runaway occurs in the battery, the support body is easy to burn, thereby causing the thermal runaway to spread. The orthographic projection of the metal part on the base plate is arranged between the orthographic projections of two adjacent battery columns on the base plate, and the metal part can serve as a flame retardant to block the spread of thermal runaway.

[0033] In this exemplary embodiment, the adhesive layer may also be located between the support body 41 and the bottom plate 11. The connection strength between the metal member 42 and the bottom plate 11 is greater than the connection strength between the support body 41 and the bottom plate 11. The surface of the support body 41 is insulated, for example, the entire support body 41 is made of insulating material, or the support body 41 includes a metal bracket and an insulating layer located on the surface of the metal bracket.

[0034] In this exemplary embodiment, Figure 1-9 As shown, a groove 411 may be formed on one side of the support body 41 facing the bottom plate 11, and the metal member 42 may be at least partially located in the groove 411. This arrangement can prevent the metal member 42 from occupying additional space inside the battery device, while ensuring the thickness of the glue layer between the metal member and the bottom plate.

[0035] In this exemplary embodiment, Figure 1-9As shown, the end surface of the metal member 42 facing the bottom plate 11 can be flush with the end surface of the support body 41 facing the bottom plate 11. In this exemplary embodiment, the metal member 42 can have a greater thickness without occupying additional space inside the battery device, so that the support frame 4 can have a higher strength.

[0036] In this exemplary embodiment, Figure 1-9 As shown, the metal part 42 includes: a main body 421 and an extension part 422, wherein the orthographic projection of the main body 421 on the bottom plate 11 extends along the second direction Y, and the orthographic projection of the main body 421 on the bottom plate 11 is located between the orthographic projections of two adjacent battery columns 3 on the bottom plate 11; the extension part 422 is connected to one side of the main body 421 in the first direction X, and the orthographic projection of the extension part 422 on the bottom plate 11 is located between the orthographic projections of two adjacent batteries 31 in the same battery column 3 on the bottom plate 11. This arrangement can make the orthographic projection of the metal part 42 on the bottom plate 11 have a larger area, that is, the metal part 42 and the bottom plate 11 can have a larger bonding area, so that this arrangement can further improve the connection strength between the support frame 4 and the bottom plate 11.

[0037] In this exemplary embodiment, Figure 1-9 As shown, the thickness of the metal part 42 in the direction perpendicular to the bottom plate 11 is h1, the thickness of the support body 41 in the direction perpendicular to the bottom plate 11 is h2, and h1 / h2 is greater than or equal to 0.05 and less than or equal to 0.5. For example, h1 / h2 can be equal to 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, etc. If h1 / h2 is too large, the thickness of the metal part 42 in the direction perpendicular to the bottom plate 11 is too large, and the overall weight of the battery device is too large; if h1 / h2 is too small, the thickness of the metal part 42 in the direction perpendicular to the bottom plate 11 is too small, the strength of the metal part 42 is too small, and the support frame 4 is prone to deformation. In this exemplary embodiment, h1 / h2 is set to a suitable size, which can not only ensure the overall strength of the support frame 4, but also avoid the overall weight of the battery device being too large.

[0038] In this exemplary embodiment, the metal member 42 and the supporting body 41 may be fixedly connected by means of snap-fitting, bonding, or the like.

[0039] In this exemplary embodiment, Figure 1-9As shown, the receiving portion 5 can be a through hole formed on the support body 41, and the battery device further includes: a first sealing member 71, the first sealing member 71 is partially located in the through hole, and in the direction of the support body 41 away from the battery 31, the first sealing member 71 is protruded from the support body 41. This arrangement can form a gap between the support frame 4 and the bottom plate 11, and the gap between the support frame 4 and the bottom plate 11 can be filled with a bonding layer of uniform thickness, and the height of the first sealing member 71 protruding from the support body 41 can limit the thickness of the bonding layer. Therefore, this exemplary embodiment can improve the connection strength between the support frame 4 and the bottom plate 11 through a bonding layer of suitable and uniform thickness.

[0040] In this exemplary embodiment, Figure 1-9 As shown, a pressure relief groove 111 is formed on the side of the bottom plate 11 facing the battery, and the pressure relief groove 111 and the receiving portion 5 are correspondingly arranged, and the first sealing member 71 includes an annular structure, and the first sealing member 71 is sealed between the pressure relief groove 111 and the receiving portion 5 to form an independent and connected sealed space between the pressure relief groove 111 and the receiving portion 5. When the pressure relief valve of the battery releases pressure, high-temperature and high-pressure gas can enter the pressure relief groove 111 through the receiving portion 5, so that the high-temperature and high-pressure gas can be discharged.

[0041] In this exemplary embodiment, Figure 1-9 As shown, in the direction in which the support body 41 is away from the battery 31, the height of the first seal 71 protruding from the support body 41 is greater than or equal to 0.2mm and less than or equal to 1.5mm. For example, the height of the first seal 71 protruding from the support body 41 can be equal to 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc. If the height of the first seal 71 protruding from the support body 41 is too large, the bonding layer between the support frame 4 and the bottom plate 11 is too thick, the strength of the bonding layer itself is low, and the support frame 4 is easily displaced relative to the bottom plate 11; if the height of the first seal 71 protruding from the support body 41 is too small, the bonding layer between the support frame 4 and the bottom plate 11 is too thin, and the connection strength between the support frame 4 and the bottom plate 11 is weak. In this exemplary embodiment, the height of the first sealing member 71 protruding from the supporting body 41 is set to a suitable size, which can prevent the support frame 4 from being displaced relative to the bottom plate 11 and also improve the connection strength between the support frame 4 and the bottom plate 11 .

[0042] like Figure 1-9 As shown, the support frame 4 further includes an edge baffle 43 located at the edge of the support body 41 , while the support body 41 does not include the edge baffle 43 .

[0043] In this exemplary embodiment, Figure 1-9As shown, a first annular step groove 81 located in the through hole is formed on the side of the support body 41 away from the battery 31, and a portion of the first sealing member 71 can be disposed in the first annular step groove 81. The first annular step groove 81 can not only limit the first sealing member 71, but also the bottom of the first annular step groove 81 can support the first sealing member 71.

[0044] In this exemplary embodiment, Figure 1-9 As shown, a second annular step groove 82 located in the through hole is formed on the side of the support body 41 facing the battery 31, and the battery device further includes: a second sealing member 72, which is partially located in the second annular step groove 82, and in the direction in which the support body 41 faces the battery 31, the second sealing member 72 is protruded from the support body 41. The second sealing member 72 includes an annular structure, and the annular structure of the second sealing member 72 is matched and arranged in the second annular step groove 82. The second sealing member 72 can prevent the glue between the batteries 31 from entering the accommodating portion 5, thereby preventing the glue from affecting the normal pressure relief of the battery.

[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) comprising a bottom plate (11); A battery pack (2) is located in the battery box (1), the battery pack (2) comprises a plurality of battery columns (3) and a support frame (4), the support frame (4) is located between the battery (31) and the bottom plate (11); The plurality of battery columns (3) are distributed in a first direction (X), the battery column (3) comprises a plurality of batteries (31) distributed along a second direction (Y), and the first direction (X) and the second direction (Y) intersect; The support frame (4) comprises a support body (41) and a metal part (42), a plurality of accommodating portions (5) are formed on the support body (41), the battery (31) is at least partially located in the accommodating portion (5), the metal part (42) is located on a side of the support body (41) facing the bottom plate (11), and an orthographic projection of the metal part (42) on the bottom plate (11) is located between orthographic projections of two adjacent battery columns (3) on the bottom plate (11); The bonding layer is at least partially bonded between the metal member (42) and the bottom plate (11).

2. The battery device according to claim 1, characterized in that: A groove (411) is formed on one side of the support body (41) facing the bottom plate (11), and the metal piece (42) is located in the groove (411).

3. The battery device according to claim 2, characterized in that: The end surface of the metal piece (42) facing the bottom plate (11) is flush with the end surface of the support body (41) facing the bottom plate (11).

4. The battery device according to any one of claims 1 to 3, characterized in that: The metal part (42) comprises: The main body (421) has an orthographic projection on the bottom plate (11) extending along the second direction (Y), and the orthographic projection of the main body (421) on the bottom plate (11) is located between the orthographic projections of two adjacent battery columns (3) on the bottom plate (11); The extension portion (422) is connected to one side of the main body portion (421) in the first direction (X), and the orthographic projection of the extension portion (422) on the base plate (11) is located between the orthographic projections of two adjacent batteries (31) in the same battery column (3) on the base plate (11).

5. The battery device according to claim 1, characterized in that: The thickness of the metal part (42) in a direction perpendicular to the bottom plate (11) is h1, the thickness of the support body (41) in a direction perpendicular to the bottom plate (11) is h2, and h1 / h2 is greater than or equal to 0.05 and less than or equal to 0.

5.

6. The battery device according to claim 1, characterized in that: The receiving portion (5) is a through hole formed on the supporting body (41), and the battery device further comprises: A first sealing member (71), wherein the first sealing member (71) is partially located in the through hole, and in a direction in which the supporting body (41) is away from the battery (31), the first sealing member (71) is protruding from the supporting body (41).

7. The battery device according to claim 6, characterized in that: In the direction in which the support body (41) is away from the battery (31), the height of the first sealing member (71) protruding from the support body (41) is greater than or equal to 0.2 mm and less than or equal to 1.5 mm.

8. The battery device according to claim 6, characterized in that: A first annular step groove (81) located in the through hole is formed on a side of the support body (41) facing away from the battery (31), and the first sealing member (71) is partially disposed in the first annular step groove (81).

9. The battery device according to claim 1 or 8, characterized in that: The accommodating portion (5) is a through hole formed on the supporting body (41), and a second annular step groove (82) located in the through hole is formed on a side of the supporting body (41) facing the battery (31), and the battery device further comprises: The second sealing member (72) is partially located in the second annular step groove (82), and in the direction in which the supporting body (41) faces the battery (31), the second sealing member (72) is protruding from the supporting body (41).

10. The battery device according to claim 1, characterized in that: The battery (31) is a cylindrical battery.

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