Battery box

Abstract

The utility model relates to the technical field of new energy vehicles, in particular to a battery box. The battery box comprises a battery assembly and an upper frame assembly. The upper frame assembly comprises an upper frame unit and a protection unit. The protection unit, the upper frame unit and the battery assembly are sequentially connected. The battery assembly is arranged in a projection area of the protection unit towards the direction of the battery assembly. The protection unit is arranged to be in a protruding shape in the direction away from the battery assembly. The distance from the maximum protruding distance of the protection unit to the battery assembly is larger than the distance from one side of the protection unit to the battery assembly. Therefore, the problem of insufficient strength of the battery box is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy vehicle technical field, specifically, relate to a battery box. BACKGROUND

[0002] With the rapid development of new energy technology, new energy vehicles have been widely used due to their energy-saving and environmentally friendly characteristics. New energy vehicles are usually equipped with battery boxes, which are the core components of the vehicle and are responsible for providing driving energy for the vehicle. In the actual use process of the vehicle, the battery box will inevitably be hit by foreign objects, especially in special operating environments such as mines, the vehicle will face frequent and large impact. In order to solve this problem, the prior art sets a straight plate skin around the battery pack to protect the battery pack in the battery box. This skin structure is mainly used to absorb and disperse external impact force, thereby reducing direct damage to the battery pack and ensuring the safety and stability of the battery box. In the prior art with the patent number CN216793897U, in order to solve the technical problem of how to develop a battery box for a battery swap station that is more quick and convenient to use, it includes a battery box frame, a battery swap connector assembly, a power battery, a battery bottom support, a top layer of electrical device bottom support, a battery management system, a battery fire extinguishing system, and a battery box top cover. The top of the battery box frame is provided with a crossbeam, and the bottom of the battery box frame is provided with four conical holes. The battery management system and the battery fire extinguishing system are connected with the top layer of electrical device bottom support. The power battery is connected with the battery bottom support. The battery swap connector assembly is connected with the bottom of the battery box frame. The battery box top cover is connected with the side of the battery box frame in a pull-out manner. The four sides of the battery box frame are connected with a skin.

[0003] However, the straight plate skin used in the prior art has significant defects when hit by foreign objects. Due to the simple structure design of the skin, its impact resistance is limited, especially in the top area of the battery box, the skin is mainly used to prevent the impact of falling objects from a high altitude, and the impact force of falling objects from a high altitude is often large, which makes the skin more prone to damage. After the skin is damaged, it may appear concave or deformed, which not only affects its protection effect, but also may cause foreign objects to be retained on the top of the battery box, causing safety hazards during vehicle operation. The key problem is that the structure design of the straight plate skin cannot effectively cope with high-strength impact, especially in the top area of the battery box, which is prone to impact, its impact resistance and durability are insufficient, and it is difficult to meet the actual use requirements. UTILITY MODEL CONTENT

[0004] To solve the problem of insufficient strength of the battery box, the utility model provides a battery box, which comprises:

[0005] A battery assembly;

[0006] The upper frame assembly comprises an upper frame unit, a protection unit; the protection unit, the upper frame unit and the battery assembly are sequentially connected; the battery assembly is arranged in a projection area of the protection unit towards the battery assembly; the protection unit is arranged in a convex shape away from the battery assembly; the distance from the maximum convex distance of the protection unit to the battery assembly is greater than the distance from one side of the protection unit to the battery assembly.

[0007] In some embodiments, the protection unit comprises a top plate, a hoisting port and a guide plate; the top plate is connected to the side of the upper frame unit away from the battery assembly; the hoisting port penetrates the top plate; the guide plate is arranged in the hollow frame of the upper frame unit, and divides the space in the hollow frame into a buffer space and a hoisting space; the hoisting port is in communication with the hoisting space; the top plate is arranged in a convex shape away from the battery assembly; the distance from the maximum convex distance of the top plate to the battery assembly is greater than the distance from one side of the top plate to the battery assembly.

[0008] In some embodiments, the guide plate is recessed in an arc-shaped plate towards the battery assembly; the hoisting space penetrates the side edge of the upper frame unit and is in communication with the external space of the side edge of the upper frame unit.

[0009] In some embodiments, the protection unit further comprises a positioning plate; the positioning plate is connected to the side of the top plate away from the battery assembly; the side of the positioning plate away from the battery assembly is a plane.

[0010] In some embodiments, flexible thermal insulation material is arranged in the buffer space.

[0011] In some embodiments, the battery box further comprises a lower frame assembly; the lower frame assembly comprises a lower frame unit, an electrical connection unit and a temperature control unit; the lower frame unit is connected to the side of the battery assembly away from the upper frame assembly; the electrical connection unit and the temperature control unit are respectively arranged in the space enclosed by the lower frame unit; the temperature control unit is in communication with the battery assembly; and the electrical connection unit is electrically connected to the battery assembly.

[0012] In some embodiments, the protection unit further comprises a filling port; the filling port penetrates the top plate; and the filling port is in communication with the temperature control unit.

[0013] In some embodiments, the temperature control unit comprises a first temperature controller and a second temperature controller; the first temperature controller, the electrical connection unit and the second temperature controller are sequentially arranged along the length direction of the lower frame unit; and the first temperature controller and the second temperature controller are respectively in communication with the battery assembly.

[0014] In some embodiments, the electric connection unit comprises an electric connection part, a controller; the electric connection part is movably connected with the lower frame unit; the controller is connected with the lower frame unit; the electric connection part is electrically connected with the controller; and the controller is electrically connected with the battery assembly.

[0015] In some embodiments, the battery assembly comprises a battery frame, a battery pack, and a temperature control plate; the upper frame unit, the battery frame, the battery assembly, and the lower frame assembly are sequentially connected; the battery pack and the temperature control plate are connected in a space enclosed by the battery frame; the temperature control plate abuts against the battery pack; the temperature control plate is in communication with the temperature control unit; and the battery pack is electrically connected with the electric connection unit.

[0016] To solve the problem of insufficient strength of the battery box, the utility model has the following advantages:

[0017] By setting the protection unit to be convex towards the direction away from the battery assembly and assembling the protection unit with the upper frame assembly, the protection unit has self-supporting capability without the need of setting additional supporting structure inside. The convex design uniformly distributes stress along the curve, avoiding excessive local stress and improving the overall strength and stability of the protection unit. Meanwhile, the distance from the maximum distance of the convex protection unit to the battery assembly is greater than the distance from one side of the protection unit to the battery assembly. When foreign matter falls on the side of the protection unit away from the battery assembly, the foreign matter can naturally slide away from the battery box under the action of gravity, avoiding retention and causing safety hazards. This structure design not only enhances the impact resistance of the protection unit, but also improves the safety and reliability of the battery assembly, effectively solving the problem of insufficient strength of the battery box in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic diagram of a battery box of an embodiment is shown;

[0019] Figure 2 A front view of a battery box of an embodiment is shown;

[0020] Figure 3 A side view of a battery box of an embodiment is shown;

[0021] Figure 4 A top view of a battery box of an embodiment is shown.

[0022] Label: 01 upper frame assembly; 11 upper frame unit; 111 first upper frame; 112 second upper frame; 113 upper stand column; 12 protection unit; 121 top plate; 122 hoisting opening; 123 guide plate; 124 positioning plate; 125 filling opening; 02 battery assembly; 21 battery frame; 03 lower frame assembly; 31 lower frame unit; 311 first lower frame; 312 second lower frame; 313 lower stand column; 32 electrical connection unit; 321 electrical connection part; 322 controller; 33 temperature control unit; 331 first temperature controller; 332 second temperature controller. DETAILED DESCRIPTION

[0023] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be appreciated that these embodiments are discussed only with the intent to provide a more complete understanding of the disclosure, and are not intended to limit the scope of the disclosure in any way.

[0024] As used herein, the term "includes" and its variants are to be read as open-ended terms that mean "includes, but is not limited to." The term "based on" is to be construed as "based at least in part on." The terms "a" and "an" are to be construed as "at least one" The term "another" is to be construed as "at least one other." The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and the like are used for clarity in describing the figures and are not to be construed as limiting the present application and its embodiments to any particular spatial arrangement or orientation. These terms are used primarily for the purpose of clarity in describing the application and its embodiments to those of ordinary skill in the art, and are not to be construed as limiting the present application and its embodiments to any particular spatial arrangement or orientation. Also, the terms "mount," "set," "provided with," "connected," "linked," should be given a broad interpretation. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first," "second," and the like are primarily used to distinguish different devices, elements or components (the specific types and structures of which can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0025] In the present embodiment, the battery assembly 02 is generally fixed and protected by the upper frame assembly 01, wherein the upper frame assembly 01 comprises an upper frame unit 11 and a protection unit 12, and the protection unit 12, the upper frame unit 11 and the battery assembly 02 are connected in sequence. The design of the protection unit 12 is mainly used to prevent external foreign objects from impacting the battery assembly 02, especially the protection unit 12 at the top of the battery box needs to cope with the impact of falling objects from a high altitude. However, the protection unit 12 used in the prior art is usually in a straight plate structure, which has significant defects when impacted by foreign objects. The impact resistance of the straight plate protection unit 12 is limited, especially when subjected to a larger impact force such as falling objects from a high altitude, it is easy to be damaged or deformed. In addition, the straight plate structure is prone to local stress concentration when stressed, resulting in insufficient structural strength and stability of the protection unit 12, which cannot effectively disperse and absorb the impact force. This design defect not only reduces the service life of the protection unit 12, but also may cause foreign objects to be retained at the top of the battery box, causing safety hazards during vehicle driving. Therefore, the design of the straight plate protection unit 12 in the prior art is difficult to meet the actual use requirements, and needs to be improved to improve its impact resistance and structural stability. Therefore, a battery box is proposed. As shown in Figure 1 、 Figure 2 、 Figure 3 The battery box comprises an upper frame assembly 01 and a battery assembly 02. The upper frame assembly 01 can comprise an upper frame unit 11 and a protection unit 12. The protection unit 12, the upper frame unit 11 and the battery assembly 02 can be connected in sequence. The battery assembly 02 can be arranged within the projection area of the protection unit 12 towards the battery assembly 02. The protection unit 12 can be arranged in a convex shape away from the battery assembly 02. The distance from the maximum distance of the convex shape of the protection unit 12 to the battery assembly 02 can be greater than the distance from one side of the protection unit 12 to the battery assembly 02. By arranging the protection unit 12 in a convex shape away from the battery assembly 02, the curved shape of the convex shape structure uniformly distributes the stress along the curve, avoiding excessive local stress, thereby improving the overall strength and stability of the protection unit 12. At the same time, the distance from the maximum distance of the convex shape of the protection unit 12 to the battery assembly 02 is greater than the distance from one side of the protection unit 12 to the battery assembly 02. When a foreign object falls to the side of the protection unit 12 away from the battery assembly 02, the foreign object can naturally slide away from the battery box under the action of gravity, avoiding the retention of foreign objects and causing safety hazards during vehicle driving.

[0026] In other embodiments, as Figure 1As shown, the upper frame unit 11 can include a first upper frame 111, a second upper frame 112, and an upper column 113. The first upper frame 111 and the second upper frame 112 are arranged at intervals and connected by the upper column 113 into a hollow frame; the second upper frame 112 is connected with the battery assembly 02. When a foreign object impacts the battery assembly 02, the upper frame unit 11 can prevent the foreign object from directly contacting the battery assembly 02, and the space surrounded by the hollow frame can form an energy absorption area to absorb the impact force of the foreign object, thereby improving the safety of the battery box.

[0027] In the present embodiment, as shown in Figure 1 , Figure 3 , Figure 4 the protection unit 12 can include a top plate 121, a lifting opening 122, and a guide plate 123. The top plate 121 can be connected with the side of the upper frame unit 11 away from the battery assembly 02. The lifting opening 122 can penetrate through both sides of the thickness direction of the top plate 121. The guide plate 123 can be arranged in the hollow frame of the upper frame unit 11 to divide the space in the hollow frame into a buffer space and a lifting space. The lifting opening 122 can be in communication with the lifting space. The top plate 121 can be arranged to be convex towards the direction away from the battery assembly 02. The distance from the maximum distance of the convexity of the top plate 121 to the battery assembly 02 can be greater than the distance from one side of the top plate 121 to the battery assembly 02. By arranging the guide plate 123, the foreign object can be prevented from directly contacting the battery assembly 02, and even if the top plate 121 deforms due to impact, the buffer space can prevent the deformed top plate 121 and the foreign object from directly contacting the battery assembly 02. The design of the lifting space facilitates the extension and movement of the lifting device into the battery box, thereby improving the convenience of assembling the battery box with the vehicle. At the same time, the guide plate 123 divides the space in the hollow frame into a buffer space and a lifting space, making full use of the space in the upper frame unit 11, thereby realizing the compactness of the battery box while ensuring the strength and installation convenience of the battery box.

[0028] In the present embodiment, as shown in Figure 1 , Figure 3 , Figure 4 the guide plate 123 can be concave towards the direction close to the battery assembly 02 to form an arc-shaped plate. The lifting space can penetrate through the side edges (for example, the left and right sides as shown in Figure 3 ) of the upper frame unit 11 and be in communication with the external space of the side edges of the upper frame unit 11. By designing the guide plate 123 as an arc-shaped plate, when a foreign object enters the lifting space from the side of the top plate 121 away from the battery assembly 02, the arc-shaped plate can guide the foreign object out of the lifting space, preventing the foreign object from continuously contacting the battery box, thereby reducing safety hazards.

[0029] In the embodiment, when the battery box is moved using the automatic hoisting device, the plurality of sensors of the automatic hoisting device need to abut against the top plate 121, but the plurality of sensors receive inconsistent pressure data due to the convex shape, and the automatic hoisting device cannot be accurately controlled to stop moving towards the battery box. As shown in Figure 1 、 Figure 4 , the protection unit 12 can also include a positioning plate 124. The positioning plate 124 can be connected to the side of the top plate 121 away from the battery assembly 02. The side of the positioning plate 124 away from the battery assembly 02 can be planar. By providing the positioning plate 124, when the battery box is moved using the automatic hoisting device, the plurality of sensors of the automatic hoisting device move from the side of the top plate 121 away from the battery assembly 02 to abut against the positioning plate 124. Since the side of the positioning plate 124 away from the battery assembly 02 can be planar, the pressure data of the plurality of sensors can be consistent, and the automatic hoisting device can be controlled to stop moving at this time, and the gripping device of the automatic hoisting device can grip the battery box.

[0030] In the embodiment, as shown in Figure 1 、 Figure 4 , a flexible thermal insulation material can be provided in the buffer space. By providing the flexible thermal insulation material, the temperature of the battery assembly 02 can be maintained within the normal working temperature range. At the same time, when the top plate 121 is impacted by foreign matter, the flexible thermal insulation material can absorb the impact force and weaken the impact force transmitted to the battery assembly 02, further protecting the safety of the battery assembly 02.

[0031] In the embodiment, as shown in Figure 1 、 Figure 2 , the battery box can also include a lower frame assembly 03. The lower frame assembly 03 can include a lower frame unit 31, an electrical connection unit 32, and a temperature control unit 33. The lower frame unit 31 can be connected to the side of the battery assembly 02 away from the upper frame assembly 01. The electrical connection unit 32 and the temperature control unit 33 can be respectively arranged in the space enclosed by the lower frame unit 31. The temperature control unit 33 can be in communication with the battery assembly 02. The electrical connection unit 32 can be electrically connected to the battery assembly 02. By providing the lower frame unit 31, the battery assembly 02 can be connected to the vehicle and supported. The electrical connection unit 32 and the temperature control unit 33 are respectively arranged in the space enclosed by the lower frame unit 31, making the structure of the battery box more compact. After the battery box is assembled with the vehicle, the electrical connection unit 32 can be electrically connected to the vehicle to transmit the electrical energy of the battery assembly 02 to the vehicle, and the temperature control unit 33 can control the temperature of the battery assembly 02 within the normal working temperature range to ensure stable operation of the battery assembly 02.

[0032] In the embodiment, as shown in Figure 1 、 Figure 4As shown, the protective unit 12 may also include a filling port 125. The filling port 125 may penetrate the top plate 121. The filling port 125 may be connected to the temperature control unit 33, thereby allowing coolant to be added to the temperature control unit 33 through the filling port 125, facilitating the maintenance of the battery box.

[0033] In other embodiments, such as Figure 1 As shown, the lower frame unit 31 may include a first lower frame 311, a second lower frame 312, and a lower support column 313; the first lower frame 311 and the second lower frame 312 are spaced apart and connected by the lower support column 313 to form a hollow frame; the first lower frame 311 is connected to the battery assembly 02 to fix the position of the battery assembly 02. The second lower frame 312 can be used to connect to a set component to fix the position of the battery box.

[0034] In this embodiment, as Figure 1 , Figure 2 As shown, the temperature control unit 33 may include a first temperature controller 331 and a second temperature controller 332. The first temperature controller 331, the electrical connection unit 32, and the second temperature controller 332 may be arranged sequentially along the length of the lower frame unit 31. The first temperature controller 331 and the second temperature controller 332 may be connected to the battery pack 02 respectively. By arranging the first temperature controller 331, the electrical connection unit 32, and the second temperature controller 332 sequentially along the length of the lower frame unit 31, the weight distribution along the length of the lower frame unit 31 can be made more uniform, improving the handling performance of the vehicle after assembly with the battery pack. At the same time, according to the temperature of the battery pack 02, the first temperature controller 331 and the second temperature controller 332 can be controlled to start individually or simultaneously, reducing energy consumption while ensuring temperature control capability. When the first temperature controller 331 fails, the second temperature controller 332 can still maintain the normal operating temperature of the battery pack 02 for a short period of time; when the second temperature controller 332 fails, the first temperature controller 331 can still maintain the normal operating temperature of the battery pack 02 for a short period of time to prevent the vehicle from stalling and improve safety.

[0035] In this embodiment, as Figure 1 , Figure 2As shown, the electrical connection unit 32 can include an electrical connection part 321, a controller 322. The electrical connection part 321 can be movably connected with the lower frame unit 31. The controller 322 can be connected with the lower frame unit 31. The electrical connection part 321 can be electrically connected with the controller 322. The controller 322 can be electrically connected with the battery assembly 02. By movably connecting the electrical connection part 321 with the lower frame unit 31, the electrical connection part 321 can move relatively within a certain range. When the battery box is assembled with the vehicle underframe, if there is an error in the relative position of the electrical interface and the electrical connection part 321, the guide device on the electrical interface can guide the electrical connection part 321 to electrically connect with the electrical interface, reducing the requirement for positioning accuracy, thereby reducing the cost. After the battery box is assembled with the vehicle, the electrical connection part 321 can be electrically connected with the electrical interface of the vehicle underframe, and the controller 322 can control the current and voltage output from the battery assembly 02 to the vehicle according to the current demand, thereby optimizing the reliability of the vehicle.

[0036] In the present embodiment, as shown in Figure 1 , Figure 2 As shown, the battery assembly 02 can include a battery frame 21, a battery pack, and a temperature control plate. The upper frame unit 11, the battery frame 21, the battery assembly 02, and the lower frame unit 03 can be connected in sequence. The battery pack and the temperature control plate can be connected in the space surrounded by the battery frame 21. The temperature control plate can abut against the battery pack. The temperature control plate can be in communication with the temperature control unit 33. The battery pack can be electrically connected with the electrical connection unit 32. By arranging the battery pack and the temperature control plate in the hollow chamber of the battery frame 21, and connecting one end of the battery frame 21 with the upper frame unit 01 and the other end with the lower frame unit 31, the pressure borne by the battery pack is reduced. The electrical connection unit 32 is electrically connected with the battery pack through the cable, and the electrical energy of the battery pack is transmitted to the vehicle to realize the driving of the vehicle. The temperature control unit 33 is in communication with the temperature control plate, the temperature control plate absorbs the heat of the battery pack, the temperature control unit 33 drives the temperature control medium to flow to the temperature control plate, and the temperature control medium after heat exchange can flow to the temperature control unit 33, so that the temperature control unit 33 restores the temperature of the temperature control medium to a range that can control the temperature of the battery pack within the normal working temperature range, thereby maintaining the normal working temperature of the battery assembly 02.

[0037] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual application, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A battery box, characterized in that, The battery box includes: Battery components; The upper frame assembly includes an upper frame unit and a protective unit; the protective unit, the upper frame unit, and the battery assembly are connected in sequence; the battery assembly is disposed in the projection area of ​​the protective unit toward the battery assembly; the protective unit is configured to protrude in a direction away from the battery assembly; the distance from the maximum protrusion of the protective unit to the battery assembly is greater than the distance from one side of the protective unit to the battery assembly.

2. The battery box according to claim 1, characterized in that, The protective unit includes a top plate, a lifting port, and a guide plate; the top plate is connected to the side of the upper frame unit away from the battery assembly; the lifting port penetrates the top plate; the guide plate is disposed within the hollow frame of the upper frame unit, dividing the space within the hollow frame into a buffer space and a lifting space; the lifting port communicates with the lifting space; the top plate is configured to bulge outwards in the direction away from the battery assembly; the distance from the maximum protrusion of the top plate to the battery assembly is greater than the distance from one side of the top plate to the battery assembly.

3. A battery box according to claim 2, characterized in that, The guide plate is recessed towards the battery assembly to form an arc-shaped plate; the hoisting space extends through the side of the upper frame unit and communicates with the external space of the side of the upper frame unit.

4. A battery box according to claim 2, characterized in that, The protective unit also includes a positioning plate; the positioning plate is connected to the side of the top plate away from the battery assembly; the side of the positioning plate away from the battery assembly is planar.

5. A battery box according to claim 2, characterized in that, The buffer space is equipped with flexible thermal insulation material.

6. A battery box according to claim 1, characterized in that, The battery box further includes a lower frame assembly; the lower frame assembly includes a lower frame unit, an electrical connection unit, and a temperature control unit; the lower frame unit is connected to the side of the battery assembly away from the upper frame assembly; the electrical connection unit and the temperature control unit are respectively disposed within the space surrounded by the lower frame unit; the temperature control unit is connected to the battery assembly; the electrical connection unit is electrically connected to the battery assembly.

7. A battery box according to claim 6, characterized in that, The protective unit also includes a filling port; the filling port penetrates through the top plate; the filling port is connected to the temperature control unit.

8. A battery box according to claim 6, characterized in that, The temperature control unit includes a first temperature controller and a second temperature controller; the first temperature controller, the electrical connection unit, and the second temperature controller are arranged sequentially along the length of the lower frame unit; the first temperature controller and the second temperature controller are respectively connected to the battery assembly.

9. A battery box according to claim 6, characterized in that, The electrical connection unit includes an electrical connection part and a controller; the electrical connection part is movably connected to the lower frame unit; the controller is connected to the lower frame unit; the electrical connection part is electrically connected to the controller; and the controller is electrically connected to the battery assembly.

10. A battery box according to claim 6, characterized in that, The battery assembly includes a battery frame, a battery pack, and a temperature control plate; the upper frame unit, the battery frame, the battery assembly, and the lower frame assembly are connected in sequence; the battery pack and the temperature control plate are connected within the space surrounded by the battery frame; the temperature control plate abuts against the battery pack; the temperature control plate is connected to the temperature control unit; and the battery pack is electrically connected to the electrical connection unit.

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