Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack. The battery box body comprises a frame and a supporting beam, the frame participates in enclosing of a cavity of the battery box body; a first cavity is formed in the frame; the supporting beam is connected to the inner side face, facing the cavity, of the frame, and the supporting beam and the frame are of an integrally-formed structure. The top face of the supporting beam is of a step-shaped structure and is provided with a first step and a second step which are connected, the step face of the first step is lower than that of the second step, and the first step is farther from the frame than the second step. Wherein the battery box body is used for accommodating the battery module through the cavity, the step surface of the first step is used for being connected with a part of the bottom surface of the battery module, and the side surface of the second step is used for being connected with a part of the side surface of the battery module.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, and in particular to a battery box and a battery pack. BACKGROUND

[0002] In the prior art, the inner side of the frame is connected with a support beam, and the support beam is used to support the battery module. However, since the support beam is only connected with part of the bottom surface of the battery module, the support effect of the support beam on the battery module is not good. CONTENT OF THE UTILITY MODEL

[0003] One of the main purposes of the present disclosure is to overcome at least one of the defects of the prior art, and to provide a battery box in which the support beam can provide a better support effect on the battery module.

[0004] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, a battery box is provided, which comprises a frame and a support beam. The frame participates in enclosing a cavity of the battery box. The inside of the frame has a first cavity. The support beam is connected to the inner side of the frame facing the cavity and is an integral molding structure with the frame. The top surface of the support beam is a stepped structure and has a first step and a second step connected thereto. The step height of the first step is lower than that of the second step, and the first step is farther away from the frame than the second step. The battery box is used to accommodate a battery module through the cavity. The step surface of the first step is used to be connected with part of the bottom surface of the battery module, and the side surface of the second step is used to be connected with part of the side surface of the battery module.

[0006] According to one of the embodiments of the present disclosure, the inside of the support beam has a second cavity.

[0007] According to one of the embodiments of the present disclosure, the second cavity is located in the region of the support beam corresponding to the second step. The region of the support beam corresponding to the first step is a solid structure and is provided with a mounting hole. The mounting hole is opened on the step surface of the first step and is used to be assembled and connected with the battery module.

[0008] According to one of the embodiments of the present disclosure, the region of the support beam corresponding to the first step is provided with a mounting hole. The mounting hole is opened on the step surface of the first step and is used to be assembled and connected with the battery module.

[0009] According to one of the embodiments of the present disclosure, the frame and the support beam are extruded profiles.

[0010] According to one of the embodiments of the present disclosure, the battery module comprises single batteries or battery columns, and end plates; the end plates are arranged at the end faces of the single batteries or battery columns, and the bottom surfaces of the end plates are higher than the bottom surfaces of the single batteries or battery columns; the step surface of the first step is used to connect with the bottom surface of the end plate, and the side surface of the second step is used to connect with the side surface of the end plate.

[0011] According to one of the embodiments of the present disclosure, the width of the step surface of the first step is equal to the thickness of the end plate, and the side surface of the first step is used to connect with the part of the end face bottom surface which is not arranged with the end plate.

[0012] According to one of the embodiments of the present disclosure, the top surface of the support beam further has a third step which is adjacent to the side of the first step away from the second step, and the step surface of the third step is lower than the step surface of the first step; the step surface of the third step is used to connect with part of the bottom surface of the single battery or battery column.

[0013] According to one of the embodiments of the present disclosure, the battery box further comprises a bottom plate; the bottom plate is connected to the side surface of the third step.

[0014] According to the above technical solution, the battery box provided by the present disclosure has the following advantages and positive effects:

[0015] The battery box provided by the present disclosure comprises a frame and a support beam; the inside of the frame has a first cavity; the support beam is connected to the inner side surface of the frame facing the cavity and is an integral forming structure with the frame; the top surface of the support beam is a stepped structure and has a first step and a second step connected thereto, the step surface height of the first step is lower than the step surface height of the second step, and the first step is farther away from the frame than the second step; the step surface of the first step is used to connect with part of the bottom surface of the battery module, and the side surface of the second step is used to connect with part of the side surface of the battery module. Through the above structural design, the frame of the present disclosure is designed to have a first cavity and is integrally formed with the support beam, which can improve the structural strength of the battery box, reduce the weight, and reduce the processing steps of part of the components of the battery box. At the same time, the top surface of the support beam of the present disclosure adopts a stepped structure, and the step surfaces and side surfaces of different steps of the stepped structure are respectively connected with the bottom surface and the side surface of the battery module, which can strengthen the connection strength between the support beam and the battery module, provide a better supporting effect, and improve the service life under specific working conditions.

[0016] Another main purpose of the present disclosure is to overcome at least one of the defects of the prior art, and to provide a battery pack using the above-mentioned battery box.

[0017] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solution:

[0018] According to one aspect of the present disclosure, a battery pack is provided, which comprises a battery module and a battery box provided by the present disclosure and described in detail in the above embodiments; the battery module is arranged in the cavity of the battery box, and a part of the bottom surface of the battery module is connected with the step surface of the first step, and a part of the side surface of the battery module is connected with the side surface of the second step.

[0019] From the above technical solution, the battery pack provided by the present disclosure has the advantages and positive effects that:

[0020] The battery pack provided by the present disclosure can improve the structural strength of the battery box, reduce the weight, and reduce the processing steps of the parts of the battery box, while the connection strength between the support beam and the battery module is strengthened, a higher support effect is provided, and the structural strength and assembly stability of the battery pack are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments of the present disclosure considered in conjunction with the drawings. The drawings are not necessarily to scale, with emphasis being placed on illustrating the principles of the present disclosure. In the drawings, like reference numerals identify the same or similar parts throughout the views. Among them:

[0022] Figure 1 is a perspective view of a battery box according to an exemplary embodiment;

[0023] Figure 2 is Figure 1 a plan view of the battery box shown;

[0024] Figure 3 is Figure 1 an enlarged view of part A in

[0025] Figure 4 is a sectional view along the straight line B-B in Figure 2 ;

[0026] Figure 5 is Figure 1 a partial sectional view of the battery box and the battery module when assembled;

[0027] Figure 6 is a partial sectional view of a battery box according to another exemplary embodiment.

[0028] The reference signs are explained as follows:

[0029] 100. battery box;

[0030] 110. frame;

[0031] 1101. first cavity;

[0032] 120. support beam;

[0033] 1201. second cavity;

[0034] 1202. mounting hole;

[0035] 121. first step;

[0036] 1211. step face;

[0037] 1212. side face;

[0038] 122. second step;

[0039] 1221. step face;

[0040] 1222. side face;

[0041] 123. third step;

[0042] 1231. step face;

[0043] 1232. side face;

[0044] 130. bottom plate;

[0045] 210. single cell;

[0046] 2101. end face;

[0047] 220. end plate. DETAILED DESCRIPTION

[0048] Typical embodiments embodying the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can be embodied in various ways without departing from the spirit or central characteristics thereof, and that the description and drawings are to be understood as illustrative in nature and not as restrictive in any way.

[0049] In the following description of various example embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the present disclosure can be implemented. It is understood that other specific arrangements of parts, structures, example devices, systems, and steps can be utilized and structural and functional modifications can be made without departing from the scope of the present disclosure. Also, while the terms "over," "between," "inside," "on," "under," and the like, can be used in this specification to describe relative location, orientation, or manner of placement in terms of the example examples illustrated in the figures, any such terms are generally used herein only to facilitate illustrating the examples as they can be oriented in one or more positions and locations in differing example implementations. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the present disclosure.

[0050] Referring to Figure 1 , a perspective view schematically illustrates a battery case 100 according to the present disclosure. In this example embodiment, the battery case 100 according to the present disclosure is described by way of example as applied to a vehicle-mounted battery device. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes can be made to the specific embodiments described below in order to apply the relevant design of the present disclosure to other types of battery devices, and such changes are still within the scope of the battery case 100 according to the present disclosure.

[0051] As shown in Figure 1 , in an embodiment of the present disclosure, the battery case 100 according to the present disclosure includes a frame 110 and a support beam 120. For reference, see Figures 2 to 5 , Figure 2 , which schematically illustrates a plan view of the battery case 100; Figure 3 , which schematically illustrates an enlarged view of a portion A in Figure 1 ; and Figure 4 , which schematically illustrates a cross-sectional view taken along a straight line B-B in Figure 2 ; and Figure 5 , which schematically illustrates a partial cross-sectional view of the battery case 100 when assembled with a battery module. The structure, connection method, and functional relationship of the main components of the battery case 100 according to the present disclosure will be described in detail below with reference to the above-described drawings.

[0052] As shown in Figures 1 to 5As shown, in an embodiment of the present disclosure, the frame 110 participates in enclosing a chamber of the battery box 100, for example, the chamber can include a battery compartment for accommodating a battery module (in some embodiments, the chamber can also include an electrical compartment for accommodating a BMS and other control management devices). The frame 110 has a first type cavity 1101 inside. The support beam 120 is connected to the inner side of the frame 110 facing the chamber, and the support beam 120 is an integral structure with the frame 110. The top surface of the support beam 120 is a stepped structure, and the stepped structure has a first step 121 and a second step 122 connected. The height of the step surface 1211 of the first step 121 is lower than the height of the step surface 1221 of the second step 122, and the first step 121 is farther away from the frame 110 than the second step 122. It should be noted that the step surface of each step described in the present specification can be understood as the horizontal surface of the corresponding step in the drawing, that is, the top surface. Furthermore, the side surface of each step described in the present specification can be understood as the vertical surface of the corresponding step in the drawing. On this basis, the battery box 100 proposed by the present disclosure is used to accommodate a battery module through the chamber, and when the battery module is accommodated in the chamber of the battery box 100, the step surface 1211 of the first step 121 is used to connect with part of the bottom surface of the battery module, and the side surface 1222 of the second step 122 is used to connect with part of the side surface of the battery module. Through the above structural design, the frame 110 of the present disclosure adopts a structure design with a first type cavity 1101 and an integral forming with the support beam 120, which can improve the structural strength of the battery box 100, reduce the weight, and reduce the processing steps of part of the components of the battery box 100. At the same time, the present disclosure adopts a stepped structure for the top surface of the support beam 120, and uses the step surface 1211 and the side surface 1222 of different steps of the stepped structure to connect with the bottom surface and the side surface of the battery module respectively, which can strengthen the connection strength between the support beam 120 and the battery module, provide better support effect, and improve the service life under certain working conditions.

[0053] As shown in Figure 3 and Figure 4 As shown, in an embodiment of the present disclosure, the region of the support beam 120 corresponding to the first step 121 can be provided with a mounting hole 1202, and the mounting hole 1202 is opened on the step surface 1211 of the first step 121. Accordingly, when the battery module is accommodated in the chamber, the battery box 100 can be assembled and connected with the battery module through the above-mentioned mounting hole 1202. For example, the battery module can be connected to the support beam 120 through the connecting piece provided in the mounting hole 1202. Through the above structural design, the present disclosure can strengthen the connection strength between the battery module and the battery box 100, and the operation is convenient and the structure is simple.

[0054] In an embodiment of the present disclosure, the frame 110 and the support beam 120 can be extruded profiles. That is, the frame 110 and the support beam 120 are integrally formed by a profile extrusion process. Since the frame 110 has the first cavity 1101, the present disclosure can greatly improve the load-bearing capacity of the frame 110 compared to a frame in the form of a single wall formed by an extrusion process. At the same time, the present disclosure can greatly improve the structural strength of the integrated structure of the frame 110 and the support beam 120.

[0055] Referring to Figure 6 , Figure 6 a partial cross-sectional view of the battery case 100 capable of embodying the principles of the present disclosure in another exemplary embodiment is shown.

[0056] As Figure 6 shown, in an embodiment of the present disclosure, the inside of the support beam 120 can have a second cavity 1201. Through the above structural design, the present disclosure can improve the load-bearing capacity of the support beam 120, optimize the support effect of the support beam 120 on the battery module, and at the same time, facilitate the reduction of the weight of the support beam 120, and facilitate the requirement of lightweight design.

[0057] As Figure 6 shown, based on the structure design that the inside of the support beam 120 has the second cavity 1201, in an embodiment of the present disclosure, the second cavity 1201 can be located in the region of the support beam 120 corresponding to the second step 122. In other words, the region of the support beam 120 corresponding to the first step 121 can not be provided with the second cavity 1201, that is, the region of the support beam 120 corresponding to the first step 121 can be a solid structure. On this basis, the region of the support beam 120 corresponding to the first step 121 can be provided with a mounting hole 1202, which is opened to the step surface 1211 of the first step 121. Accordingly, when the battery module is accommodated in the cavity, the battery case 100 can be assembled and connected with the battery module through the above-mentioned mounting hole 1202. Moreover, the present disclosure provides the second cavity 1201 only in the region of the support beam 120 corresponding to the first step 121, which can facilitate the arrangement of the mounting hole 1202 in the region of the support beam 120 corresponding to the second step 122, and further improve the structural rationality and the production and processing convenience of related components. In some other embodiments of the present disclosure, the region of the support beam 120 corresponding to the second step 122 can also be provided with the second cavity 1201. At this time, the mounting hole 1202 can also be arranged in these second cavities 1201 by providing structures such as assembly columns, and is not limited to the above-mentioned embodiment.

[0058] As Figure 4 and Figure 5As shown, in one embodiment of this disclosure, the battery module may include a single battery cell 210 (or a battery array, i.e., a combination structure formed by multiple single batteries 210 arranged in a certain direction) and an end plate 220. The end plate 220 is disposed on the end face 2101 of the single battery cell 210 (or battery array), and the bottom surface of the end plate 220 is higher than the bottom surface of the single battery cell 210 or battery array. In other words, the end plate 220 and the bottom of the single battery cell 210 form a stepped structure. Based on this, the step surface 1211 of the first step 121 is used to connect with the bottom surface of the end plate 220, and the side surface 1222 of the second step 122 is used to connect with the side surface of the end plate 220. Through the above structural design, this disclosure can achieve a stepped structure in which the shape of the bottom surface of the battery module end matches the shape of the top surface of the support beam 120, further strengthening the connection strength between the support beam 120 and the battery module, and providing a better support effect. In addition, this disclosure can reduce or avoid gaps at the bottom of the battery module caused by supporting the battery module on the first step 121 of the support beam 120, further improving space utilization and helping to increase the energy density of the battery pack.

[0059] like Figure 5 As shown, based on the structural design of the battery module including an end plate 220 supported on the step surface 1211 of the first step 121, in one embodiment of this disclosure, the width of the step surface 1211 of the first step 121 can be equal to the thickness of the end plate 220. Accordingly, the side surface 1212 of the first step 121 is used to connect with the portion of the bottom of the end face 2101 where the end plate 220 is not provided. Through the above structural design, this disclosure can further strengthen the connection strength between the support beam 120 and the battery module.

[0060] like Figure 4 As shown, based on the structural design of the battery module including a single cell 210 (or a battery array) and an end plate 220, in one embodiment of this disclosure, the stepped structure on the top surface of the support beam 120 may further have a third step 123. This third step 123 is adjacent to the side of the first step 121 away from the second step 122, and the step surface 1231 of the third step 123 is lower than the step surface 1211 of the first step 121. Furthermore, the step surface 1231 of the third step 123 is used to connect with a portion of the bottom surface of the single cell 210 (or battery array). Through the above structural design, this disclosure can further strengthen the connection strength between the support beam 120 and the battery module.

[0061] like Figure 4 As shown, the stepped structure based on the top surface of the support beam 120 has a third step 123. In one embodiment of this disclosure, the battery box 100 may further include a base plate 130. The base plate 130 is connected to the side 1232 of the third step 123.

[0062] It should be noted that the battery box 100 shown in the drawings and described in this specification is only a few examples of many kinds of battery boxes 100 that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the battery box 100 shown in the drawings or described in this specification.

[0063] In summary, the battery box 100 proposed by the present disclosure includes a frame 110 and a support beam 120; the inside of the frame 110 has a first cavity 1101; the support beam 120 is connected to the inner side of the frame 110 facing the cavity and is an integral molding structure with the frame 110; the top surface of the support beam 120 is a stepped structure and has a connected first step 121 and a second step 122, the step height of the first step 121 is lower than the step height of the second step 122, and the first step 121 is farther away from the frame 110 than the second step 122; the step surface of the first step 121 is used to connect with part of the bottom surface of the battery module, and the side surface of the second step 122 is used to connect with part of the side surface of the battery module. Through the above structural design, the frame 110 of the present disclosure adopts a structure design with a first cavity 1101 and an integral molding with the support beam 120, which can improve the structural strength of the battery box 100, reduce the weight, and reduce the processing steps of part of the components of the battery box 100. At the same time, the top surface of the support beam 120 adopts a stepped structure, and the step surfaces and side surfaces of different steps of the stepped structure are respectively connected with the bottom surface and side surface of the battery module, which can strengthen the connection strength between the support beam 120 and the battery module, provide better support effect, and improve the service life under certain working conditions.

[0064] Based on the above detailed description of the several exemplary embodiments of the battery box proposed by the present disclosure, the following will combine the above drawings to describe an exemplary embodiment of the battery pack proposed by the present disclosure.

[0065] In an embodiment of the present disclosure, the battery pack proposed by the present disclosure includes a battery module and a battery box proposed by the present disclosure and described in detail in the above embodiments. The battery module is arranged in the cavity of the battery box, part of the bottom surface of the battery module is connected with the step surface of the first step, and part of the side surface of the battery module is connected with the side surface of the second step.

[0066] It should be noted that the battery pack shown in the drawings and described in this specification is only a few examples of many kinds of battery packs that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the battery pack shown in the drawings or described in this specification.

[0067] In summary, the battery pack provided by the present disclosure can improve the structural strength of the battery box, reduce the weight, and reduce the processing steps of the components of the battery box, while improving the connection strength between the support beam and the battery module, providing higher support effect, thereby improving the structural strength and assembly stability of the battery pack.

[0068] The exemplary embodiments of the battery box and the battery pack provided by the present disclosure are described and / or illustrated above in detail. However, the embodiments of the present disclosure are not limited to the specific embodiments described herein, but rather the components of each embodiment and / or the steps of each method can be used independently and separately from other components and / or methods described herein. Each component and / or step of one embodiment can also be used in combination with other components and / or steps of other embodiments. The language used in the description herein has been principally selected for readability and instructional purposes and can not have been selected to delineate or circumscribe the inventive subject matter, it being understood that structures and / or means like or similar to those described herein can be utilized without departing from the spirit and scope of the present disclosure. The use of the terms "including", "comprising", or "having" and variations thereof herein is intended to be equivalent to the term "consisting of" to mean the inclusion made of any stated integers or combination of stated integers for any embodiment. It is intended that excluding any element or step inherently means excluding any other optional element or step. Additionally, the terms "first", "second", and other such numerical terms referring to a described and / or illustrated element, component, region, layer, or the like, are used merely as labels to distinguish a described and / or illustrated element from another described and / or illustrated element, and are not intended to signify characteristics or order other than the order of description. The terms "about" and "substantially" used herein are understood as leaving some leeway such that when there is a stated value, the actual value can be up to ±10% of the stated value.

[0069] While the battery box and the battery pack provided by the present disclosure have been described in terms of various specific embodiments, those skilled in the art will recognize that modifications can be made to the embodiments of the present disclosure without departing from the spirit and scope of the claims.

Claims

1. A battery case characterized by comprising: The battery box comprises: a frame, which participates in enclosing a cavity of the battery box; the inside of the frame has a first cavity; a support beam, which is connected to the inner side of the frame facing the cavity and is integrally formed with the frame; the top surface of the support beam is a stepped structure and has a first step and a second step connected in sequence, the height of the step surface of the first step is lower than the height of the step surface of the second step, and the first step is farther away from the frame than the second step; wherein the battery box is used to accommodate a battery module via the cavity, the step surface of the first step is used to connect with part of the bottom surface of the battery module, and the side surface of the second step is used to connect with part of the side surface of the battery module.

2. The battery pack of claim 1, wherein, The inside of the support beam has a second cavity.

3. The battery pack of claim 2, wherein, The second cavity is located in the region of the support beam corresponding to the second step; wherein the region of the support beam corresponding to the first step is a solid structure and is provided with a mounting hole, the mounting hole is opened on the step surface of the first step and is used to assemble and connect with a battery module.

4. The battery pack of claim 1, wherein, The region of the support beam corresponding to the first step is provided with a mounting hole, the mounting hole is opened on the step surface of the first step and is used to assemble and connect with a battery module.

5. The battery pack of claim 1, wherein, The frame and the support beam are extruded profiles.

6. The battery pack of claim 1, wherein, The battery module comprises: a single battery or a battery column; an end plate, which is arranged on the end surface of the single battery or the battery column, the bottom surface of the end plate is higher than the bottom surface of the single battery or the battery column; wherein the step surface of the first step is used to connect with the bottom surface of the end plate, and the side surface of the second step is used to connect with the side surface of the end plate.

7. The battery pack of claim 6, wherein, The width of the step surface of the first step is equal to the thickness of the end plate, and the side surface of the first step is used to connect with the part of the end surface bottom where the end plate is not arranged.

8. The battery pack of claim 6, wherein, The top surface of the support beam further has a third step, the third step is adjacent to the side of the first step away from the second step, and the step surface of the third step is lower than the step surface of the first step; wherein the step surface of the third step is used to connect with part of the bottom surface of the single battery or the battery column.

9. The battery pack of claim 8, wherein, The battery box further comprises: a bottom plate, which is connected to the side surface of the third step.

10. A battery pack, characterized by, The battery box comprises: the battery box of any one of claims 1-9; a battery module, which is arranged in the cavity of the battery box, part of the bottom surface of the battery module is connected with the step surface of the first step, and part of the side surface of the battery module is connected with the side surface of the second step.

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