Battery box and battery system

Abstract

The utility model provides a battery box and a battery system, and relates to the technical field of power batteries. The battery box comprises a frame and a box body fixed in the frame, the box body is completely located in an accommodating space of the frame, and a battery module is arranged in the box body. According to the battery box, the frame and the box body are matched to accommodate the battery module, the box body is completely located in the accommodating space of the frame, and the box body and the frame share the space in the vertical direction. Compared with the prior art, the assembly space in the vertical direction can be saved, so that the volume energy density of the battery system is improved. The frames of the plurality of battery boxes are stacked in sequence to form the battery system, so that the production and assembly efficiency of the battery system is improved.

Description

A battery box and battery system Technical Field

[0001] This application relates to the field of power battery technology, and more specifically, to a battery box and battery system. Background Technology

[0002] Currently, in the commercial vehicle sector, such as electric heavy-duty trucks and mining trucks, a battery system solution is typically used to increase the overall battery capacity. This involves directly stacking multiple battery standard boxes and connecting them via high and low voltage wiring harnesses to complete the assembly of the entire battery cluster system. Existing battery standard boxes have frames formed by splicing aluminum profiles. To improve support strength, each layer of battery standard boxes requires a steel base support, resulting in low vertical space utilization for the entire battery cluster system. Summary of the Invention

[0003] The purpose of this application is to address the shortcomings of the prior art by providing a battery box and battery system that can save vertical assembly space, thereby increasing the volumetric energy density of the battery system.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0005] In one aspect of this application, a battery box is provided, comprising: a frame and a box body fixed within the frame, the box body being entirely located within the receiving space of the frame, and a battery module being disposed within the box body.

[0006] Optionally, the enclosure includes a base frame and a cover mounted on the base frame. The base frame is fixedly connected to the bottom of the frame, and the cover is fixedly connected to the base frame.

[0007] Optionally, the cover includes a cover body and a flange disposed around the edge of the cover body, the flange covering the base frame and being fixedly connected to the base frame.

[0008] Optionally, a temperature control plate is provided at the bottom of the enclosure, and the battery module is mounted on the temperature control plate.

[0009] Optionally, a thermally conductive adhesive layer is provided between the battery module and the temperature control board.

[0010] Optionally, the bottom of the enclosure is provided with an elastic support, and the temperature control plate abuts against the elastic support.

[0011] Optionally, the base frame includes a rectangular frame, multiple longitudinal beams parallel to the length direction of the rectangular frame, and multiple second crossbeams parallel to the width direction of the rectangular frame. The two ends of the longitudinal beams are respectively connected to two opposite inner surfaces of the rectangular frame, and the two ends of the second crossbeams are respectively connected to two other opposite inner surfaces of the rectangular frame. The two opposite surfaces of the battery module abut against two adjacent second crossbeams, and the other two opposite surfaces abut against two opposite inner surfaces of the rectangular frame.

[0012] Optionally, the top of the frame is provided with a mounting port for the enclosure to enter the receiving space.

[0013] Optionally, the frame is a steel frame and the box is a steel box.

[0014] In another aspect of the embodiments of this application, a battery system is provided, including a plurality of battery boxes as described above, the plurality of battery boxes being stacked sequentially in a vertical direction, and the battery modules within the plurality of battery boxes being electrically connected.

[0015] The beneficial effects of this application include:

[0016] This application provides a battery box, including a frame and a housing fixed within the frame. The housing is entirely located within the receiving space of the frame, and a battery module is housed within the housing. This battery box uses a frame-housing-housing-module configuration to house the battery module, with the housing entirely within the receiving space of the frame, and both sharing vertical space. Compared to existing technologies, this saves vertical assembly space, thereby increasing the volumetric energy density of the battery system. Multiple battery box frames can be stacked sequentially to form a battery system, improving the production and assembly efficiency of the battery system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the battery box provided in an embodiment of this application;

[0019] Figure 2 is an exploded view of the battery box provided in an embodiment of this application;

[0020] Figure 3 is a schematic diagram of the battery system provided in an embodiment of this application;

[0021] Figure 4 is a schematic diagram of the structure of the frame and the box body in the battery box provided in the embodiment of this application.

[0022] Icons: 100-Battery box; 110-Frame; 110a-Reception space; 110b-Mounting port; 111-First crossbeam; 112-Column; 120-Box body; 121-Base frame; 1211-Rectangular frame; 1212-Longitudinal beam; 1213-Second crossbeam; 122-Cover; 1221-Cover body; 1222-Flanged edge; 123-Mounting panel; 130-Battery module; 140-Temperature control board; 150-Elastic support; 200-Battery system. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] According to one aspect of this application embodiment, referring to Figures 1 and 2, a battery box 100 is provided, including: a frame 110 and a box body 120 fixed within the frame 110. The box body 120 is completely located within the receiving space 110a of the frame 110, and a battery module 130 is provided inside the box body 120.

[0030] The frame 110 is formed by splicing together multiple columnar materials (such as profiles) end to end, which together enclose the receiving space 110a of the frame 110. The housing 120 is disposed within the receiving space 110a and is fixedly connected to the frame 110. Referring to Figure 3, the outer surface of the housing 120 does not extend beyond the outer surface of the frame 110, thus allowing the frame 110 to protect the housing 120 and enabling multiple battery boxes 100 to be stacked via the frame 110. The housing 120 is used to house and secure the battery modules 130. When there are two or more sets of battery modules 130 within the housing 120, the battery modules 130 are electrically connected. The two or more sets of battery modules 130 can be arranged sequentially along the length of the housing 120 or distributed in a rectangular array.

[0031] When the battery system 200 is stacked, the frame 110 mainly serves as the upper and lower support, and is preferably made of low-cost, high-strength materials, such as steel. Similarly, the housing 120, as the structure for fixing and supporting the battery modules 130, is also preferably made of low-cost, high-strength materials, such as steel. In this way, the overall strength of the battery housing 100 can be improved and the cost can be significantly reduced.

[0032] The housing 120 and the frame 110 can be fixed together by welding, bolting, riveting, or gluing. The frames 110 of the two battery boxes 100 on the upper and lower layers can also be fixed together by welding, bolting, riveting, or gluing, allowing for flexible configuration of different numbers of layers. Preferably, the housing and frame 110 are fixed together by welding, and the upper and lower frames 110 are fixed together by bolting.

[0033] The aforementioned battery box 100 uses a frame 110 and a housing 120 to house the battery module 130. The housing 120 is entirely located within the housing space 110a of the frame 110, and both share vertical space. Compared to existing technologies, this saves vertical assembly space, thereby increasing the volumetric energy density of the battery system 200. Multiple battery boxes 100 frames 110 can be stacked sequentially to form the battery system 200, improving the production and assembly efficiency of the battery system 200.

[0034] Optionally, the top of the frame 110 is provided with a mounting port 110b, which is used to allow the housing 120 to enter the receiving space 110a for installation of the housing 120.

[0035] To dissipate heat from the battery module 130, optionally, as shown in Figures 2 and 4, a temperature control plate 140 is provided at the bottom of the housing 120, and the battery module 130 is mounted on the temperature control plate 140.

[0036] The temperature control plate 140, through contact with the battery module 130, utilizes internal liquid circulation to absorb and remove heat generated by the battery module 130 or to transfer heat to the battery module 130 (liquid cooling or liquid heating), thereby controlling the temperature of the battery module 130. The temperature control plate 140 is preferably made of a material with good thermal conductivity, such as aluminum. The aluminum temperature control plate 140, combined with the steel frame 110 and housing 120, can significantly reduce the cost of the battery box 100.

[0037] Furthermore, there are multiple temperature control plates 140, which extend along the length of the enclosure 120 and are spaced apart along the width of the enclosure 120.

[0038] By setting up multiple temperature control boards 140, each board can be independently controlled, resulting in more precise temperature control of the battery module 130 and energy savings. Taking liquid cooling of the battery module 130 as an example, when the temperature of the battery module 130 is only slightly higher than the preset temperature, only some temperature control boards 140 can be activated to cool the battery module 130; however, when the temperature of the battery module 130 is significantly higher than the preset temperature and poses a risk, all temperature control boards 140 can be activated to quickly cool the battery module 130.

[0039] Optionally, a thermally conductive adhesive layer is provided between the battery module 130 and the temperature control board 140.

[0040] The bottom of the battery module 130 is bonded to the temperature control plate 140 with thermally conductive adhesive, which not only fixes the battery module 130 but also does not adversely affect the heat transfer between the battery module 130 and the temperature control plate 140.

[0041] Optionally, the bottom of the housing 120 is provided with an elastic support 150, and the temperature control plate 140 abuts against the elastic support 150.

[0042] The elastic support 150 is located between the temperature control plate 140 and the bottom surface of the housing 120. It is used to absorb the assembly gap tolerance of the temperature control plate 140 caused by the unevenness of the bottom surface of the housing 120, so that the temperature control plate 140 and the battery module 130 can achieve good contact.

[0043] Furthermore, there are multiple elastic support members 150, which are arranged in a rectangular array at the bottom of the housing 120.

[0044] Multiple elastic support components 150 are set up to adjust various areas of the bottom surface of the housing 120, which can better absorb the assembly gap tolerance of the temperature control plate 140.

[0045] In the foregoing embodiments, the structures of the frame 110 and the housing 120 are not limited, as long as they can achieve their respective functions. Several feasible structural schemes for the frame 110 and the housing 120 are given below.

[0046] Optionally, the frame 110 includes multiple first crossbeams 111 and columns 112. Some of the first crossbeams 111 are connected end to end to form a first frame, and the remaining first crossbeams 111 are connected end to end to form a second frame opposite to the first frame. Multiple columns 112 are vertically connected between the first frame and the second frame.

[0047] The first frame, the second frame, and the pillars 112 together enclose a receiving space 110a. Generally, the frame 110 is a cuboid, and correspondingly, both the first and second frames are rectangular. One end of the pillar 112 is perpendicularly connected to a corner of the first frame, and the opposite end is perpendicularly connected to a corner of the second frame. Furthermore, multiple pillars 112 can be connected along the length of the first and second frames to improve the overall strength of the frame 110. The box 120 can enter the receiving space 110a through the first frame and is fixedly connected to the second frame.

[0048] Optionally, the housing 120 includes a base frame 121 and a cover 122 disposed on the base frame 121. The base frame 121 is fixedly connected to the bottom of the frame 110, and the cover 122 is fixedly connected to the base frame 121.

[0049] The base frame 121 is used to fix and support the battery module 130, and the cover 122 is mounted on the base frame 121 and fixedly connected to the base frame 121. After the cover 122 is installed, it cooperates with the base frame 121 to house the battery module 130. The housing 120 is fixedly connected to the bottom of the frame 110 through the base frame 121, thereby making full use of the housing space 110a within the frame 110 and further improving the volumetric energy density of the battery system 200.

[0050] The cover 122 is preferably made of lightweight, low-cost composite material to achieve lightweighting and sealing of the battery module 130. The cover 122 and the base frame 121, as well as the base frame 121 and the frame 110, can be connected by bolts.

[0051] Optionally, the cover 122 includes a cover body 1221 and a flange 1222 disposed around the edge of the cover body 1221. The flange 1222 covers the base frame 121 and is fixedly connected to the base frame 121.

[0052] The flange 1222 increases the surface area of ​​the edge region of the cover 122, facilitating the connection between the cover 122 and the base frame 121. The lower surface of the flange 1222 fits against the upper edge of the base frame 121, increasing the contact area between the cover 122 and the base frame 121, which also improves the sealing performance of the box 120.

[0053] The flange 1222 of the cover 122 and the connection between the box 120 and the frame 110 share the lateral space, saving the space for fixing and assembling the box 120 in the horizontal direction, and further improving the volumetric energy density of the battery system 200.

[0054] Optionally, the base frame 121 includes a rectangular frame 1211, multiple longitudinal beams 1212 parallel to the length direction of the rectangular frame 1211, and multiple second crossbeams 1213 parallel to the width direction of the rectangular frame 1211. The two ends of the longitudinal beams 1212 are respectively connected to two opposite inner surfaces of the rectangular frame 1211, and the two ends of the second crossbeams 1213 are respectively connected to two other opposite inner surfaces of the rectangular frame 1211. The two opposite surfaces of the battery module 130 abut against two adjacent second crossbeams 1213, and the other two opposite surfaces abut against two opposite inner surfaces of the rectangular frame 1211.

[0055] Multiple longitudinal beams 1212 are used to reinforce the rectangular frame 1211 to improve the support capacity of the base frame 121 for the battery module 130. Optionally, the lower surface of the longitudinal beams 1212 is flush with the lower surface of the rectangular frame 1211. Multiple second crossbeams 1213 are disposed above the longitudinal beams 1212 and connected to two inner surfaces opposite each other in the width direction of the rectangular frame 1211. The second crossbeams 1213 can further reinforce the rectangular frame 1211 and also divide the area on the base frame 121 in the length direction, with one battery module 130 placed in each area. After the battery module 130 is installed, the two adjacent crossbeams cooperate with the rectangular frame 1211 to limit and fix the battery module 130.

[0056] If a temperature control plate 140 is also provided inside the enclosure 120, preferably, the lower surface of the temperature control plate 140 is in contact with the upper surface of the longitudinal beam 1212, and the upper surface of the temperature control plate 140 is in contact with the lower surface of the crossbeam. Furthermore, since there is a gap between two adjacent longitudinal beams 1212, the temperature control plate 140 can be used to cover the gap, thereby sealing the enclosure 120.

[0057] Furthermore, the lower surface of the rectangular frame 1211 is flush with the lower surface of the frame 110, and the outer side wall of the rectangular frame 1211 is attached and fixedly connected to the first crossbeam 111 at the bottom of the frame 110. In this way, the receiving space 110a inside the frame 110 can be fully utilized to improve the energy density of the battery, and the strength of the frame 110 can be improved by using the base frame 121.

[0058] Optionally, the upper surface of the rectangular frame 1211 is provided with a mounting panel 123, which is used to mount the circuit interface and / or conduit interface of the battery box 100.

[0059] Furthermore, the mounting panel 123 is located in the width direction of the rectangular frame 1211, and the flange 1222 of the cover 122 also covers the edge of the mounting panel 123.

[0060] In another aspect of the embodiments of this application, a battery system 200 is provided, including a plurality of battery boxes 100 as described above, the plurality of battery boxes 100 being stacked sequentially in a vertical direction, and battery modules 130 within the plurality of battery boxes 100 being electrically connected.

[0061] The battery system 200 includes the same structure and beneficial effects as the battery box 100 in the foregoing embodiments. The structure and beneficial effects of the battery box 100 have been described in detail in the foregoing embodiments and will not be repeated here.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery box, characterized in that, include: A frame and a housing fixed within the frame, the housing being entirely located within the receiving space of the frame, and a battery module being housed within the housing.

2. The battery box as described in claim 1, characterized in that, The enclosure includes a base frame and a cover mounted on the base frame. The base frame is fixedly connected to the bottom of the frame, and the cover is fixedly connected to the base frame.

3. The battery box as described in claim 2, characterized in that, The cover includes a cover body and a flange disposed around the edge of the cover body. The flange covers the base frame and is fixedly connected to the base frame.

4. The battery box as described in claim 1, characterized in that, The bottom of the enclosure is equipped with a temperature control plate, and the battery module is mounted on the temperature control plate.

5. The battery box as described in claim 4, characterized in that, A thermally conductive adhesive layer is provided between the battery module and the temperature control board.

6. The battery box as described in claim 4, characterized in that, The bottom of the box is provided with an elastic support member, and the temperature control plate abuts against the elastic support member.

7. The battery box as described in claim 2, characterized in that, The base frame includes a rectangular frame, multiple longitudinal beams parallel to the length direction of the rectangular frame, and multiple second crossbeams parallel to the width direction of the rectangular frame. The two ends of the longitudinal beams are respectively connected to two opposite inner surfaces of the rectangular frame, and the two ends of the second crossbeams are respectively connected to two other opposite inner surfaces of the rectangular frame. The two opposite surfaces of the battery module abut against two adjacent second crossbeams, and the other two opposite surfaces abut against two opposite inner surfaces of the rectangular frame.

8. The battery box as described in claim 1, characterized in that, The top of the frame is provided with an installation port for the enclosure to enter the receiving space.

9. The battery box as described in claim 1, characterized in that, The frame is a steel frame, and the box is a steel box.

10. A battery system, characterized in that, It includes multiple battery boxes as described in any one of claims 1 to 9, the multiple battery boxes being stacked sequentially in a vertical direction, and the battery modules within the multiple battery boxes being electrically connected.

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