Battery box, battery pack and electric device

Abstract

The utility model relates to a battery box, a battery pack and a power utilization device, the battery box comprises a box body, the box body comprises a plurality of edge beams, the edge beams are arranged in a surrounding mode, and a plurality of grooves are formed in the circumferential outer side walls of the edge beams; and the plurality of hanging lug structures are respectively embedded into the corresponding grooves and are connected with the edge beams. The hanging lug structure and the box body are independently produced and machined, the forming difficulty of the box body and the hanging lug structure is reduced, the hanging lug structure and the box body are detachably connected, installation is convenient, and operation is easy.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery box, a battery pack and an electrical device. Background Art

[0002] With the popularization of new energy vehicles, people have higher and higher technical requirements for battery packs. As a core component, batteries determine the performance of electric vehicles.

[0003] In the related art, some manufacturers adopt the method of setting a strong frame on the box body and fixing the battery on the strong frame through a hanging ear structure, and the hanging ear structure and the box body are an integrally formed structure.

[0004] The ear-hanging structure needs to bear the installation strength of the battery pack, making its structural strength particularly important. However, due to the large structural differences in the installation ear-hanging structure, it is difficult to form the box and the ear-hanging structure, which leads to problems such as poor effect after forming, reducing the production yield of the battery pack and increasing production costs. Utility Model Content

[0005] The present application provides a battery box, a battery pack and an electrical device, which can reduce the difficulty of forming the box body and the hanging ear structure, improve the production yield of the battery pack and reduce the production cost.

[0006] In a first aspect, the present application provides a battery box, comprising: a box body, comprising a plurality of side beams, the side beams are arranged in an enclosed manner, and the circumferential outer side walls of the side beams are provided with a plurality of grooves; and a plurality of hanging ear structures, respectively embedded in the corresponding grooves and connected to the side beams.

[0007] In a possible implementation, the ear hook structure includes an ear hook body, a first limiting portion and a second limiting portion; the ear hook body has a first direction, the first limiting portion and the second limiting portion are arranged on both sides of the ear hook body along the first direction, and the ear hook body is embedded in the groove; the side beam has a first surface and a second surface arranged opposite to each other along the first direction, the first limiting portion is in contact with the first surface, and the second limiting portion is in contact with the second surface.

[0008] In a possible implementation, the first limiting portion includes a first flange body and / or a second flange body; the ear hook body has a second direction and a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; wherein the second direction is the same as the installation direction when the ear hook structure is installed in the groove; the first flange body extends along the second direction, and the second flange body extends along the third direction; the first flange body and / or the second flange body are in contact with the first surface; the second limiting portion includes a third flange body, and the third flange body extends along the third direction; the third flange body is in contact with the second surface.

[0009] In a possible implementation manner, a through threaded hole is provided in the middle portion of the hanging ear body along the first direction.

[0010] In a possible implementation, the multiple side beams include two first side beams arranged relatively to each other along the third direction and two second side beams arranged relatively to each other along the second direction; the multiple hanging ear structures are respectively arranged on the first side beam and / or the second side beam; the multiple hanging ear structures are respectively arranged symmetrically along the center line of the first side beam and / or the multiple hanging ear structures are respectively arranged symmetrically along the center line of the second side beam.

[0011] In a possible implementation manner, a maximum dimension of the hanging ear structure along the third direction is 75 mm-150 mm.

[0012] In a possible implementation, the battery box further includes a connecting piece, and the ear structure is detachably connected to the side beam via the connecting piece.

[0013] In a possible implementation, the hanging ear structure and the side beam are made of different series of aluminum materials; or, the hanging ear structure is made of steel material, and the side beam is made of aluminum material.

[0014] In a possible implementation, the side beam is formed by die casting or extrusion.

[0015] In a second aspect, the present application provides a battery pack, comprising a plurality of battery cells and a battery box as described in the first aspect, wherein the battery box has a receiving cavity, and the plurality of battery cells are disposed in the receiving cavity.

[0016] In a third aspect, the present application provides an electrical device, comprising a loading component and a battery pack as described in the second aspect, wherein the battery pack is fixed to the loading component via a hanging ear structure of the battery box.

[0017] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0018] The battery case and battery pack provided in the embodiments of the present application, the ear structure and the case are produced and processed independently, which reduces the difficulty of forming the case and the ear structure. The ear structure and the case are detachably connected, and are easy to install and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0022] Figure 1 A schematic diagram of the structure of a battery box provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of a battery box provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of a hanging ear structure provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of the ear hook structure provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of a connector provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 1. Box body; 11. Side beam; 111. Groove; 112. First side beam; 1121. First surface; 1122. Second surface; 113. Second side beam; 12. Bottom plate; 2. Hanging ear structure; 21. Hanging ear body; 211. Through threaded hole; 22. First limiting portion; 221. First flange body; 222. Second flange body; 23. Second limiting portion; 231. Third flange body; 3. Connector; X, third direction; Y, second direction; Z, first direction. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0031] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0032] In order to solve technical problems such as poor molding effect in related technologies, the present application provides a battery case, in which the ear hanging structure and the case are produced and processed independently, reducing the molding difficulty of the case and the ear hanging structure. The ear hanging structure and the case are detachably connected, which is convenient to install and easy to operate.

[0033] In some exemplary embodiments, Figure 1 As shown, a battery box can be applied to a battery pack to fix battery cells. The battery pack can be installed in an electrical device to meet the power demand of the electrical device. The electrical device is, for example, an electrical device such as a car.

[0034] The battery box includes a box body 1 and a plurality of ear structures 2. The ear structures 2 can place the battery cells on the box body 1 to fix the battery cells. The box body 1 includes a plurality of side beams 11, which are arranged to form a frame structure. The side beams 11 can be die-cast or extruded, which is easy to implement and improves production efficiency.

[0035] In some examples, the plurality of side beams 11 include, for example, two first side beams 112 arranged opposite to each other along a third direction X and two second side beams 113 arranged opposite to each other along a second direction Y. The first side beams 112 are respectively fixedly connected to the second side beams 113 to form a four-frame structure, thereby improving the stability of the entire box 1. The side beams 11 are, for example, integrally formed by injection molding, so that the connection between the first side beams 112 and the second side beams 113 is more reliable, and the assembly process is effectively simplified, thereby improving the assembly efficiency.

[0036] The multiple hanging ear structures 2 are independently formed structures, which can be formed by forging or die casting, but are not limited to forging. For example, there can be four hanging ear structures 2, which can be respectively arranged on the first side beam 112, and each first side beam 112 is provided with two hanging ear structures 2, and the two hanging ear structures 2 on each first side beam 112 are respectively symmetrically arranged along the center line of the first side beam 112. The first side beam 112 is a straight section, which can ensure that after the hanging ear structure 2 is embedded, the first side beam 112 is evenly stressed, and the side beam 11 of the box body 1 is not easily deformed. The hanging ear structures 2 are symmetrically arranged relative to the center line, which can ensure balanced stress.

[0037] Alternatively, a plurality of lug structures 2 may be disposed on the second side beam 113, and the plurality of lug structures 2 are symmetrically disposed along the midline of the second side beam 113. The manner in which the lug structures 2 are disposed on the second side beam 113 is the same as the manner in which the lug structures 2 are disposed on the first side beam 112, and will not be repeated herein.

[0038] Alternatively, a hanging ear structure 2 is provided on both the first side beam 112 and the second side beam 113, and a plurality of hanging ear structures 2 are symmetrically arranged along the center line of the first side beam 112 and the center line of the second side beam 113, respectively. Both hanging ear structures 2 are provided to balance the overall structure of the battery box. When the battery box is installed on an electrical device, stress can be evenly distributed to avoid local overweight, which affects the balance or the service life of the battery box.

[0039] The circumferential outer side wall of the side beam 11 is provided with a plurality of grooves 111, and the plurality of hanging ear structures 2 are respectively embedded in the corresponding grooves 111 and connected to the side beam 11. The outer surfaces of the plurality of hanging ear structures 2 are flush with the outer surface of the side beam 11 to ensure the flatness of the appearance of the battery box and avoid potential safety hazards due to local protrusions or exposed sharp parts.

[0040] In some examples, the lug structure 2 and the side beam 11 can be fixedly connected, and the lug structure 2 can be welded to the side beam 11 to improve the reliability of the connection. Welding includes but is not limited to fusion welding, pressure welding, brazing, etc. When welding is used, the lug structure 2 and the side beam 11 can be made of different series of aluminum materials, such as 6 series aluminum or 7 series aluminum, and the side beam 11 can be made of 5 series aluminum. Using different series of aluminum materials can improve the strength of welding.

[0041] In other examples, the ear hanging structure 2 and the side beam 11 may also be detachably connected, such as by screwing, clamping, riveting, etc., to facilitate disassembly, maintenance or replacement, etc., thereby realizing the flexibility of the ear hanging structure 2. In the detachable connection mode, the ear hanging structure 2 is made of steel material, and the side beam 11 is made of aluminum material, thereby enhancing the strength of the ear hanging structure 2 and improving the service life of the ear hanging structure 2.

[0042] When screwed, the battery box also includes a connector 3, such as a screw, a bolt or the like. The ear structure 2 is detachably connected to the side beam 11 through the connector 3 to facilitate replacement or assembly, thereby improving the flexibility of the ear structure 2 during installation.

[0043] In this embodiment, if Figure 1 As shown, the ear hook structure 2 includes an ear hook body 21 , a first limiting portion 22 and a second limiting portion 23 .

[0044] The ear hook body 21 has a first direction Z, for example, a thickness direction of the ear hook body 21, and the ear hook body 21 has a second direction Y and a third direction X. The first direction Z, the second direction Y and the third direction X are perpendicular to each other. The second direction Y is the same as the installation direction when the ear hook structure 2 is installed in the groove 111.

[0045] The first limiting portion 22 and the second limiting portion 23 are disposed on both sides of the hook body 21 along the first direction Z to protrude the hook body 21. The hook body 21 is embedded in the groove 111, and the first limiting portion 22 and the second limiting portion 23 overlap the side beam 11 to achieve clamping.

[0046] Exemplarily, the side beam 11 has a first surface 1121 and a second surface 1122 that are arranged opposite to each other along a first direction Z, and the first limiting portion 22 is overlapped on the side beam 11 so that the first limiting portion 22 is fitted with the first surface 1121, and the second limiting portion 23 is overlapped on the side beam 11 so that the second limiting portion 23 is fitted with the second surface 1122.

[0047] The first limiting portion 22 and the second limiting portion 23 clamp the side beam 11 to limit the movement in the first direction Z, thereby achieving the purpose of limiting and clamping, realizing rapid assembly, and improving assembly efficiency.

[0048] In some examples, the first limiting portion 22 includes a first flange body 221, which extends along the second direction Y. The first flange body 221 protrudes from the hook body 21 to facilitate overlapping on the side beam 11, so that the first flange body 221 is fitly arranged with the first surface 1121 of the side beam 11 to achieve a limiting connection.

[0049] In other examples, the first limiting portion 22 includes a second flange body 222 extending along the third direction X, and the second flange body 222 protrudes from the hook body 21 to facilitate overlapping on the side beam 11, so that the second flange body 222 is fitly arranged with the first surface 1121 of the side beam 11 to achieve a limiting connection.

[0050] In other examples, the first limiting portion 22 includes a first flange body 221 and a second flange body 222, and the first flange body 221 and the second flange body 222 both protrude from the hook body 21 to facilitate overlapping on the side beam 11, so that the first flange body 221 and the second flange body 222 are fitly arranged with the first surface 1121 of the side beam 11, thereby achieving limiting in different directions, improving the limiting effect, and facilitating quick assembly.

[0051] In this embodiment, the second limiting portion 23 includes a third flange body 231, and the third flange body 231 extends along the third direction X to protrude the hook body 21, so that the third flange body 231 is arranged in close contact with the second surface 1122. When the hook structure 2 is subjected to an upward force in the first direction Z, the second surface 1122 of the side beam 11 can support the hook structure 2. Similarly, when the hook structure 2 is subjected to a downward force in the first direction Z, the first surface 1121 of the side beam 11 can support the hook structure 2, thereby improving the overall structural strength.

[0052] It should be noted that there may be two third flange bodies 231 , and the two third flange bodies 231 are disposed on both sides of the ear hook body 21 along the third direction X to improve stability during installation.

[0053] A through threaded hole 211 is provided in the middle of the ear body 21 along the first direction Z, so as to facilitate the battery pack to be hung on the electrical device for assembly. The threaded connection can make the connection between the two more reliable and prevent them from falling off.

[0054] Among them, the maximum dimension L of the ear structure 2 along the third direction X is 75mm-150mm, which can ensure sufficient strength without increasing the overall weight of the battery pack, and can also reduce costs and avoid wasting too much material.

[0055] Here, it should be noted that the battery box is also provided with a bottom plate 12, and the side beam 11 is fixedly connected to the bottom plate 12. The side beam 11 is arranged on the edge of the bottom plate 12, so that the bottom plate 12 closes one side of the side beam 11. Some other components can be arranged on the bottom plate 12, and the specific other components are mainly based on actual conditions.

[0056] The present application also provides a battery pack, including a plurality of battery cells and a battery box as in the above embodiment, wherein the battery box has a receiving cavity, and the plurality of battery cells are arranged in the receiving cavity to protect the battery and ensure the flatness of the appearance.

[0057] The present application also provides an electric device, including a loading part and a battery pack as in the above embodiment, wherein the battery pack is fixed to the loading part through the ear structure of the battery box to complete the assembly. The battery cells in the battery pack can supply power to the electric device to meet the power demand of the electric device. The electric device is, for example, an electric device such as a new energy vehicle.

[0058] In the related art, a strong frame is provided on the box body, and the battery is fixed on the strong frame by using a hanging ear structure, which increases the overall volume of the battery pack.

[0059] The battery box proposed in the present application embeds the ear structure on the side beam. The ear occupies a small space and has an embedded design. The side beam and the ear structure are split structures, so that the two can be processed separately, reducing the difficulty of forming. Compared with the related technology, the one-piece molding design makes the processing of the ear structure simpler and can reduce the processing cost.

[0060] The ear structure is an "I"-shaped structure, which can improve the pressure-bearing capacity of the ear structure and enhance the overall structural strength.

[0061] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0062] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0063] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A battery box, characterized in that: include: A box body (1) comprises a plurality of side beams (11), wherein the side beams (11) are arranged in an enclosed manner, and a plurality of grooves (111) are arranged on the circumferential outer side walls of the side beams (11); and A plurality of hanging ear structures (2) are respectively embedded in the corresponding grooves (111) and connected to the side beams (11).

2. The battery box according to claim 1, characterized in that: The ear hook structure (2) comprises an ear hook body (21), a first limiting portion (22) and a second limiting portion (23); The ear hook body (21) has a first direction (Z), the first limiting portion (22) and the second limiting portion (23) are arranged on both sides of the ear hook body (21) along the first direction (Z), and the ear hook body (21) is embedded in the groove (111); The side beam (11) comprises a first surface (1121) and a second surface (1122) which are arranged opposite to each other along the first direction (Z); the first limiting portion (22) is in contact with the first surface (1121); and the second limiting portion (23) is in contact with the second surface (1122).

3. The battery box according to claim 2, characterized in that: The first limiting portion (22) comprises a first flange body (221) and / or a second flange body (222); The hanging ear body (21) has a second direction (Y) and a third direction (X), and the first direction (Z), the second direction (Y) and the third direction (X) are perpendicular to each other; wherein the second direction (Y) is the same as the installation direction of the hanging ear structure (2) when it is installed in the groove (111); The first flange body (221) extends along the second direction (Y), and the second flange body (222) extends along the third direction (X); The first flange body (221) and / or the second flange body (222) are in contact with the first surface (1121); The second limiting portion (23) comprises a third flange body (231), and the third flange body (231) extends along the third direction (X); The third flange body (231) is in contact with the second surface (1122).

4. The battery box according to claim 2, characterized in that: A through threaded hole (211) is provided in the middle of the hook body (21) along the first direction (Z).

5. The battery box according to claim 3, characterized in that: The plurality of side beams (11) include two first side beams (112) arranged opposite to each other along the third direction (X) and two second side beams (113) arranged opposite to each other along the second direction (Y); The plurality of hanging ear structures (2) are respectively arranged on the first side beam (112) and / or the second side beam (113); The plurality of hanging ear structures (2) are symmetrically arranged along the center line of the first side beam (112) and / or the plurality of hanging ear structures (2) are symmetrically arranged along the center line of the second side beam (113).

6. The battery box according to claim 3, characterized in that: The maximum dimension (L) of the ear hook structure (2) along the third direction (X) is 75 mm to 150 mm.

7. The battery box according to claim 1, characterized in that: The battery box also includes a connecting piece (3), and the hanging ear structure (2) is detachably connected to the side beam (11) via the connecting piece (3).

8. The battery box according to any one of claims 1 to 7, characterized in that: The ear structure (2) and the side beam (11) are made of different series of aluminum materials; or, The hanging ear structure (2) is made of steel material, and the side beam (11) is made of aluminum material.

9. The battery box according to any one of claims 1 to 7, characterized in that: The side beam (11) is formed by die casting or extrusion.

10. A battery pack, characterized in that: It comprises a plurality of battery cells and a battery box as claimed in any one of claims 1 to 9, wherein the battery box has a receiving cavity, and the plurality of battery cells are arranged in the receiving cavity.

11. An electrical device, characterized in that: It comprises a loading component and a battery pack as claimed in claim 10, wherein the battery pack is fixed to the loading component via a hanging ear structure (2) of the battery box.

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