Battery device and vehicle

Abstract

The utility model discloses a battery device and a vehicle, the battery device comprises a plurality of battery modules and a box body, the box body is used for being connected with a vehicle body, the box body is provided with an opening and a bottom plate, the opening and the bottom plate are oppositely arranged along the height direction of the battery device, and the battery modules are placed into the box body through the opening; each battery module comprises at least one battery cell group and a frame, the frame and the bottom plate enclose an accommodating space, the battery cell group is positioned in the accommodating space and is fixedly connected with the frame, and the frame is detachably connected with the box body. By improving the structure of the battery device, the repair cost of the new energy vehicle is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a battery device and a vehicle. BACKGROUND

[0002] In order to improve the capacity of the battery, the battery device of the conventional new energy vehicle is to directly place a plurality of battery monomers in the box body connected with the vehicle body, and the battery monomers are fixedly connected with the box body. In this way, after one of the battery monomers fails, the entire battery device needs to be replaced. This causes the problem of high repair cost of the new energy vehicle. CONTENT OF THE UTILITY MODEL

[0003] An object of the present application is to provide a new technical solution of a battery device and a vehicle, by improving the structure of the battery device, to reduce the repair cost of the new energy vehicle.

[0004] In one aspect of the present application, a battery device and a vehicle are provided. The battery device comprises a plurality of battery modules and a box body, the box body is used to be connected with a vehicle body, the box body has an opening and a bottom plate, the opening and the bottom plate are oppositely arranged along the height direction of the battery device, and the battery modules are put into the box body through the opening; each battery module comprises at least one battery cell group and a frame, the frame and the bottom plate enclose an accommodation space, the battery cell group is located in the accommodation space and is fixedly connected with the frame, and the frame is detachably connected with the box body.

[0005] By adopting the way in the present application, the battery monomers are fixedly connected with the frame, and then the frame is detachably connected with the box body, so that the detachable connection between different battery modules and the box body in the box body is realized. Therefore, when the battery monomers fail, the entire battery device does not need to be replaced, but only the battery module to which the battery monomers belong needs to be replaced. In this way, the repair cost of the battery device can be significantly reduced, and the repair cost of the new energy vehicle can be reduced.

[0006] Optionally, the frame comprises two end plates and side plates connected in sequence, the two end plates are oppositely arranged along a first direction, and the two side plates are oppositely arranged along a second direction.

[0007] The bottom plate is provided with a support beam, the support beam is perpendicular to the bottom plate, the support beam corresponds to the end plate one by one, and the support beam and the end plate extend in the same direction, the end plate is pressed against the support beam in the height direction and is bolted with the support beam.

[0008] Optionally, in the height direction, the end plate has a bottom end face which is pressed against the support beam, and the side plate exceeds the bottom end face in the height direction, and the part of the end face of the side plate which exceeds the bottom end face is defined as a stopper which abuts against the side wall of the support beam in the horizontal direction.

[0009] Optionally, the accommodation space is provided with a spacing beam which separates the accommodation space into several sub-areas.

[0010] At least one of the battery cell groups is arranged in each of the sub-areas and is spaced apart from the spacing beam in the expansion direction of the battery cell group.

[0011] Optionally, the spacing beam extends in the height direction and is fixedly connected to one of the bottom plate or the frame; or,

[0012] The spacing beam comprises a first segment and a second segment which are arranged in the height direction, the first segment is fixedly connected to the frame, the second segment is fixedly connected to the bottom plate, and the first segment and the second segment are bolted.

[0013] Optionally, the first segment and the second segment both extend in the second direction, and both ends of the first segment are fixedly connected to the inner wall of the side plate.

[0014] Both ends of the second segment protrude from the accommodation space to be fixedly connected to the inner wall of the corresponding box.

[0015] Optionally, the side plate is pressed against the bottom plate in the height direction.

[0016] Both of the side plates are provided with a relief groove which is recessed from the end face of the side plate which faces the bottom plate, and part of the second segment is inserted into the relief groove.

[0017] Optionally, a connecting bolt is further provided, part of the connecting bolt penetrates the end plate in the height direction, and part of the connecting bolt is located on the support beam and is spaced apart from the bottom plate.

[0018] Optionally, each of the battery cell groups comprises a plurality of battery cell monomers, and the end plate is fixedly connected to the battery cell group in the expansion direction of the battery cell monomers.

[0019] Optionally, the surface of each of the end plates which is away from the battery cell group is provided with at least two hanging holes, and the two hanging holes are spaced apart in the second direction.

[0020] In another aspect, a vehicle is also provided, which comprises the above-mentioned battery device, and the box is connected to the vehicle body of the vehicle.

[0021] Other features of the present specification, and the advantages thereof over existing prior art of the same or similar nature, will become apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings illustrate exemplary embodiments of the present specification and together with the description, function to explain the principles of the present specification.

[0023] Figure 1 is a sectional view of a battery device in the embodiments of the present application;

[0024] Figure 2 is a partial exploded view of a battery module;

[0025] Figure 3 is a partial structural view of a battery cell group;

[0026] Figure 4 is a top view of a box;

[0027] Figure 5 is a partial enlarged view of Figure 1 ;

[0028] Figure 6 is a side view of a battery module;

[0029] Figure 7 is a top view of Figure 6 ;

[0030] Figure 8 is a structural view of a frame;

[0031] Figure 9 is a top view of Figure 8 ;

[0032] Figure 10 is a schematic view of a battery module in a hoisting state;

[0033] Figure 11 is a schematic view of a battery module and a box in a docking process.

[0034] Explanation of the reference signs:

[0035] 100, battery module; 101, battery cell group; 1011, battery cell monomer; 102, frame; 1021, end plate; 1021a, bottom end surface; 1021b, top end surface; 1022, side plate; 1022a, stop portion; 1022b, avoiding groove; 103, first film body; 104, high-voltage connection and low-voltage sampling system between battery cells; 105, heating film; 200, box; 201, bottom plate; 2011, support beam; 300, spacing beam; 301, first section; 302, second section; 401, sub-region; 402, connecting bolt; 403, hanging hole; 404, hoisting tool. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] This application provides a battery device, such as Figure 1 As shown, the battery device includes several battery modules 100 and a housing 200. The housing 200 is used to connect to the vehicle body. The housing 200 has an opening and a bottom plate 201, the opening and the bottom plate 201 being aligned along the height direction of the battery device. Figure 2 The opening is set relative to the z-axis. In the height direction, the opening is closer to the vehicle body.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, during the assembly of the battery module 100 with the housing 200, the battery module 100 is inserted into the housing 200 through the opening. Each battery module 100 includes at least one cell assembly 101 and a frame 102. Each cell assembly 101 includes a plurality of individual cells 1011. The frame 102 and the base plate 201 enclose a receiving space, within which the cell assembly 101 is located. The frame 102 includes two end plates 1021 and a side plate 1022 connected in sequence, with the two end plates 1021 along a first direction ( Figure 2 The two side plates 1022 are arranged opposite each other in the middle (X direction), and are arranged along the second direction (X direction). Figure 2 The end plate 1021 and side plate 1022 are arranged opposite each other in the Y direction. They are joined end-to-end by laser welding to form a space, and the bottom plate 201 seals this space in the height direction. The end plate 1021 and side plate 1022 surround the outside of the battery cell assembly 101 and are connected to it. The planes containing the first and second directions are perpendicular to the height direction of the vehicle. That is, the first and second directions are approximately horizontal.

[0039] The battery cell assembly 101 is fixedly connected to the frame 102. The end plate 1021 and side plate 1022 of the frame 102 are respectively glued to the battery cell assembly 101 to support it. Simultaneously, the frame 102 is detachably connected to the housing 200. This connection can be achieved through snap-fit ​​or threaded connection. Specifically, the end plate 1021 can be threaded to the bottom plate 201, the side plate 1022 can be threaded to the bottom plate 201, or the end plate 1021 or side plate 1022 can be snap-fitted to the side wall of the housing 200.

[0040] By adopting the manner in the application, the cell monomer 1011 is fixedly connected with the frame 102, and then the frame 102 is detachably connected with the box 200, so that the detachable connection between the battery module 100 and the box 200 is realized. Therefore, when the cell monomer 1011 fails, the entire battery device does not need to be replaced, and only the battery module 100 to which the cell monomer 1011 belongs needs to be replaced. In this way, the repair cost of the battery device can be significantly reduced, and the repair cost of the new energy vehicle can be reduced.

[0041] In some optional embodiments, each battery module 100 can further include a first film body 103, the first film body 103 being an insulating film, the first film body 103 being arranged at the opening of the box 200, so as to realize the insulation between the cell group 101 and the vehicle body. A cell-to-cell high-voltage connection and low-voltage sampling system 104 is further arranged between the first film body 103 and the cell group 101, and the first film body 103 is integrated in the cell-to-cell high-voltage connection and low-voltage sampling system 104. The cell-to-cell high-voltage connection and low-voltage sampling system 104 is integrated with the end plate 1021, and an aluminum bar for high-voltage connection of the cell monomer 1011 and a flexible circuit board for low-voltage sampling are integrated. The aluminum bar is electrically connected to the cell group 101 by welding. The flexible circuit board for low-voltage sampling is connected to the management system of the battery device to monitor the state of the cell monomer 1011.

[0042] The battery module 100 can further include a heating film 105 arranged between the bottom plate 201 and the cell group 101 to heat the cell group 101.

[0043] In a specific embodiment, as shown in Figure 4 The bottom plate 201 is provided with a support beam 2011. The two support beams 2011 are oppositely arranged along the first direction. The support beam 2011 has a certain height. The support beam 2011 is perpendicular to the bottom plate 201, the support beam 2011 corresponds to the end plate 1021 one by one, and extends in the same direction as the end plate 1021. The end plate 1021 is pressed against the support beam 2011 in the height direction and is bolted to the support beam 2011. By arranging the support beam 2011, the positioning effect can be achieved when the battery module 100 is installed. At the same time, the direct thread connection between the end face and the bottom plate 201 can be avoided to damage the structure of the bottom plate 201.

[0044] In the embodiment, as shown in Figure 5As shown, the battery device further comprises a connecting bolt 402, and an end face of the end plate 1021 away from the bottom plate 201 is defined as a top end face 1021b. The connecting bolt 402 penetrates the end plate 1021 along the height direction from the top end face 1021b to be screwed with the support beam 2011, and an end of the connecting bolt 402 close to the bottom plate 201 is spaced from the bottom plate 201. Thus, after the battery module 100 is placed into the box body 200, the battery module 100 can be conveniently installed by operating the mouth of the box body 200.

[0045] Referring to Figure 5 , Figure 6 and Figure 7 , the end plate 1021 has a bottom end face 1021a in the height direction. The bottom end face 1021a is pressed against the support beam 2011, and the bottom end face 1021a is close to the support beam 2011 and abuts against an end face of the support beam 2011. The side plate 1022 extends in the height direction and beyond the bottom end face 1021a on a side close to the bottom plate 201. The side plate 1022 extends along the first direction and has two end faces in the first direction. The side plate 1022 is located between the two support beams 2011. A portion of the side plate 1022 beyond the bottom end face 1021a is defined as a stop portion 1022a, and the stop portion 1022a abuts against a side wall of the support beam 2011 in the horizontal direction. In this way, during installation, the two support beams 2011 enclose an installation channel, the battery module 100 is lowered into the installation channel, and the two stop portions 1022a of the side plate 1022 abut against the side walls of the support beams 2011 on the corresponding sides to form a limit in the first direction. Under the positioning action of the stop portions 1022a, the two end plates 1021 can be aligned with the support beams 2011 in the height direction to be pressed against the upper portions of the support beams 2011. Thus, the installation precision of the battery module 100 can be improved, and the installation efficiency can be improved.

[0046] In some other embodiments of the present application, as shown in Figure 3 , Figure 8 and Figure 9 , the accommodation space is provided with a spacing beam 300, and the spacing beam 300 divides the accommodation space into a plurality of sub-regions 401. At least one battery cell group 101 is arranged in each sub-region 401, and the battery cell group 101 is arranged spaced apart from the spacing beam 300 in the expansion direction. The expansion direction of the battery cell group 101 is the expansion direction of each battery cell monomer 1011. By arranging the spacing beam 300 and arranging the battery cell group 101 spaced apart from the spacing beam 300 in the expansion direction, an expansion space can be provided for the battery cell group 101. At the same time, the spacing beam 300 can stop the battery cell group 101 in the expansion direction, so as to avoid excessive expansion of the battery cell group 101.

[0047] In one embodiment, the spacing beam 300 extends along the height direction and is fixedly connected with one of the bottom plate 201 and the frame 102. The spacing beam 300 is connected with the bottom plate 201 or the frame 102 in a manner that the expansion force of the battery cell group 101 can be transmitted to the bottom plate 201 or the frame 102.

[0048] In another embodiment, as shown in Figure 1 、 Figure 8 and Figure 9 , the spacing beam 300 comprises a first section 301 and a second section 302 arranged along the height direction, and the first section 301 and the second section 302 are in a split structure. The first section 301 is fixedly connected with the frame 102, the second section 302 is fixedly connected with the bottom plate 201, and the first section 301 is bolted with the second section 302. In this way, the spacing beam 300 can be connected with the bottom plate 201 and the frame 102 at the same time. The structural stress of the spacing beam 300 is further improved.

[0049] Specifically, the first section 301 and the second section 302 both extend along the second direction, and the two ends of the first section 301 are fixedly connected with the inner walls of the side plates 1022. The first section 301 is welded with the inner walls of the side plates 1022. The two ends of the second section 302 protrude from the accommodating space to be fixedly connected with the inner walls of the corresponding box body 200.

[0050] Optionally, the side plates 1022 are pressed against the bottom plate 201 along the height direction. In this way, the structural strength of the frame 102 is improved. The two side plates 1022 are both provided with an avoiding groove 1022b formed by the end face of the side plate 1022 facing the bottom plate 201 being recessed along the height direction, and part of the second section 302 is inserted into the avoiding groove 1022b. In this way, while the side plates 1022 abut against the bottom plate 201, the second section 302 can also protrude from the side plates 1022 to be fixed with the inner walls of the box body 200.

[0051] In one specific embodiment, each battery cell group 101 comprises a plurality of battery cell monomers 1011, each battery cell monomer 1011 has a bonding face, and the two bonding faces are oppositely arranged along the expansion direction of the battery cell monomer 1011. The end plate 1021 is bonded with the bonding face along the expansion direction of the battery cell monomer 1011, and an insulating film can also be arranged between the end plate 1021 and the bonding face, and the insulating film, the end plate 1021 and the bonding face are bonded with each other.

[0052] The spacing beam 300 and the two end plates 1021 are parallel to each other to increase the space of each sub-region 401. The end plates 1021 and the spacing beam 300 can stop the expansion of the battery cell group 101 in the expansion direction of the battery cell group 101.

[0053] In some other embodiments of the present application, as shown in Figure 10 andFigure 11 As shown, each end plate 1021 is provided with at least two hanging holes 403 away from the surface of the battery cell group 101, and the two hanging holes 403 are arranged at intervals along the second direction. After the two hooks of the lifting tool 404 are hung with the two hanging holes 403, the battery module 100 is lifted and lowered into the box body 200.

[0054] In another aspect of the present application, a vehicle is also provided, which comprises the above-mentioned battery device, and the box body 200 is connected with the vehicle body. By providing the battery device in the present application on the vehicle, the repair cost of new energy vehicles can be significantly reduced.

[0055] The principles and implementation manners of the present application are described by applying specific examples herein, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be noted that, for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A battery device, characterized by, The battery device comprises a box (200) and a plurality of battery modules (100), the box (200) is used to be connected with a vehicle body, the box (200) has an opening and a bottom plate (201), the opening is oppositely arranged with the bottom plate (201) along the height direction of the battery device, and the battery modules (100) are put into the box (200) through the opening. Each battery module (100) comprises a frame (102) and at least one battery cell group (101), the frame (102) and the bottom plate (201) form an accommodation space, the battery cell group (101) is located in the accommodation space and is fixedly connected with the frame (102), and the frame (102) is detachably connected with the box (200).

2. The battery device of claim 1, wherein The frame (102) comprises two end plates (1021) and two side plates (1022) connected in sequence, the two end plates (1021) are oppositely arranged along a first direction, and the two side plates (1022) are oppositely arranged along a second direction. The bottom plate (201) is provided with a support beam (2011) which is perpendicular to the bottom plate (201), the support beam (2011) corresponds to the end plate (1021) one by one and extends in the same direction as the end plate (1021), the end plate (1021) is pressed against the support beam (2011) in the height direction and is bolted with the support beam (2011).

3. The battery device of claim 2, wherein, In the height direction, the end plate (1021) has a bottom end face (1021a) which is pressed against the support beam (2011), and the side plate (1022) exceeds the bottom end face (1021a) on the side close to the bottom plate (201) in the height direction, the part of the end face of the side plate (1022) exceeding the bottom end face (1021a) is defined as a stop portion (1022a), and the stop portion (1022a) abuts against the side wall of the support beam (2011) in the horizontal direction.

4. The battery device of claim 2, wherein The accommodation space is provided with a spacing beam (300), and the spacing beam (300) divides the accommodation space into a plurality of sub-regions (401). At least one battery cell group (101) is arranged in each sub-region (401), and the battery cell group (101) is arranged in the spacing direction of the battery cell group (101) and is spaced apart from the spacing beam (300).

5. The battery device of claim 4, wherein, The spacing beam (300) extends along the height direction and is fixedly connected with one of the bottom plate (201) and the frame (102); or, The spacing beam (300) comprises a first segment (301) and a second segment (302) arranged along the height direction, the first segment (301) is fixedly connected with the frame (102), the second segment (302) is fixedly connected with the bottom plate (201), and the first segment (301) and the second segment (302) are bolted.

6. The battery device of claim 5, wherein, The first segment (301) and the second segment (302) extend along the second direction, and the two ends of the first segment (301) are fixedly connected with the inner wall of the corresponding side plate (1022). Two ends of the second section (302) are extended from the accommodating space to be fixedly connected with the inner wall of the corresponding box (200).

7. The battery device of claim 6, wherein The side plate (1022) is pressed against the bottom plate (201) along the height direction; Both of the side plates (1022) are provided with an avoiding groove (1022b), which is recessed from the end face of the side plate (1022) facing the bottom plate (201) along the height direction, and the second section (302) is partially inserted into the avoiding groove (1022b).

8. The battery device according to any one of claims 4 to 7, wherein Further comprising a connecting bolt (402), and the end face of the end plate (1021) away from the bottom plate (201) is defined as a top end face (1021b), and the connecting bolt (402) penetrates the end plate (1021) along the height direction from the top end face (1021b) to be connected with the support beam (2011).

9. The battery device according to any one of claims 2 to 7, wherein Each of the battery cell groups (101) comprises a plurality of battery cell monomers (1011), and the end plate (1021) is fixedly connected with the battery cell group (101) along the expansion direction of the battery cell monomer (1011).

10. The battery device according to any one of claims 2 to 7, wherein The surface of each of the end plates (1021) away from the battery cell group (101) is provided with at least two hanging holes (403), and the two hanging holes (403) are arranged at intervals along the second direction.

11. A vehicle characterized by comprising: The battery device comprises the battery device of any one of claims 1-10, and the box (200) is connected with the vehicle body of the vehicle. The surface of each of the end plates (1021) away from the battery cell group (101) is provided with at least two hanging holes (403), and the two hanging holes (403) are arranged at intervals along the second direction.

Images