Box cover, battery box and energy storage equipment

Abstract

The utility model provides a box cover, a battery box and energy storage equipment. The box cover of the battery box comprises a cover body and an anti-explosion valve, the cover body comprises a top plate and a side plate, the side plate surrounds the top plate, a containing space is defined by the side plate and the top plate, a first chamfer is arranged at the joint of at least one end of the top plate and the side plate, and the anti-explosion valve is arranged at the first chamfer. According to the box cover of the battery box provided by the embodiment of the invention, the connecting part of one end of the top plate and the side plate is designed into the first chamfer, and the anti-explosion valve is arranged at the first chamfer, so that on one hand, the stress concentration at the connecting part of the top plate and the side plate can be reduced, and the structural strength and durability of the connecting part are improved; according to the battery box, the space vacancy rate in the battery box can be reduced, so that the overall structural appearance of the battery box is more compact, and the technical problem that the battery box occupies a large space in the related technology is solved to adapt to a limited mounting space.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a box cover, a battery box and energy storage equipment. Background Art

[0002] As a core energy component, a power battery system (e.g., an energy storage device) is used to provide the energy required to output power to the carrier (e.g., automobile, ship, etc.) in which it is used. A power battery system (e.g., an energy storage device) typically includes a battery box, power components, and some auxiliary components. The battery box has a storage space within which the power components and some auxiliary components are housed. In related technologies, some power battery systems have a large internal space vacancy rate, resulting in a waste of space and hindering the improvement of energy density. Some components that need to be arranged on the outer surface of the battery box protrude from the surface of the battery box, resulting in the need for additional space to avoid these components after the power battery system is installed in a car, ship, or other carrier. Utility Model Content

[0003] The embodiments of the present utility model provide a box cover, a battery box and an energy storage device, which can improve the technical problems of low space utilization and large space occupied by energy storage devices in related technologies.

[0004] In a first aspect, an embodiment of the present invention provides a battery box cover, comprising:

[0005] The cover body includes a top plate and side plates, wherein the side plates are arranged around the top plate.

[0006] An accommodating space is formed between the side panels and the top panel, and a first chamfer is provided at a connection between at least one end of the top panel and the side panels; and

[0007] An explosion-proof valve is arranged at the first chamfer.

[0008] In one embodiment, the side panel includes a first side panel, which is located on one side of the top panel in the circumferential direction; the cover body also includes a first connecting plate, which is connected between the first side panel and the top panel to form the first chamfer, and the angle between the first side panel and the first chamfer is greater than or equal to 100° and less than or equal to 160°.

[0009] In one embodiment, in a direction perpendicular to the top plate, the first side plate has a first height, and the first chamfer has a second height.

[0010] A ratio of the first height to the second height is greater than or equal to 0.5 and less than or equal to 14.

[0011] In one embodiment, the side plate further includes a second side plate connected to an end of the top plate facing away from the first chamfer;

[0012] The box cover further comprises a panel, which is mounted on the second side panel and is provided with at least one of an electrical interface, an indicating component and a human-computer interaction component.

[0013] In one embodiment, a second chamfer is provided at a connection between the second side plate and the top plate, and the second chamfer is a rounded chamfer.

[0014] In one embodiment, the radius of the second chamfer is between 1 mm and 40 mm.

[0015] In one embodiment, the cover body also includes a connecting edge, which is bent and connected to one end of the side panel facing away from the top panel, and the connecting edge is connected to the outer surface of the side panel and extends in a direction away from the accommodating space. The connecting edge is provided with a mounting hole, and the mounting hole is used to connect and fix with the bottom plate of the battery box.

[0016] In one embodiment, the ratio of the thickness of the connecting edge to the thickness of the side panel is greater than 1 and less than or equal to 4; and / or

[0017] The thickness of the connecting edge is greater than 1 mm and less than or equal to 4 mm.

[0018] In one embodiment, the side panels and the connecting edges are integrally formed; or

[0019] The connecting edge is welded to the side plate.

[0020] In a second aspect, an embodiment of the present invention provides a battery box, comprising:

[0021] The box cover described in the embodiment of the present application; and

[0022] The liquid cooling base plate is sealed and connected to the box cover to enclose and form the closed accommodating space.

[0023] In one embodiment, when the cover further includes a connecting edge, the battery box further includes a sealing connector, and the sealing connector is provided between the liquid-cooling base plate and the connecting edge to seal the accommodating space.

[0024] In a third aspect, an embodiment of the present invention provides an energy storage device, comprising:

[0025] The battery box according to the embodiment of the present application; and

[0026] A battery pack is arranged in the accommodating space.

[0027] Beneficial effects of the embodiments of the present utility model: The box cover of the battery box provided in the embodiment of the present application, by designing the connection between one end of the top plate and the side plate as a first chamfer, and the explosion-proof valve is arranged at the first chamfer, on the one hand, it can reduce the stress concentration at the connection between the top plate and the side plate, improve the structural strength and durability of the connection, and at the same time reduce the space vacancy rate inside the battery box, so that the overall structural appearance of the battery box is more compact, and improve the technical problem of the battery box occupying a large space in the related technology to adapt to the limited installation space. On the other hand, the angle between the top plate and the side plate is increased to make the part passivated, which can effectively prevent scratches on the human body, improve the safety of use, and enhance the appearance and touch of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is an exploded schematic diagram of a battery box provided in an embodiment of the present utility model;

[0030] Figure 2 This is a side view of a battery box provided in an embodiment of the present utility model;

[0031] Figure 3 This is another side view of the battery box provided by an embodiment of the present utility model;

[0032] Figure 4 It is a cross-sectional schematic diagram of a cover body provided by an embodiment of the present utility model;

[0033] Figure 5 yes Figure 4 Enlarged schematic diagram of part A in the middle.

[0034] Description of reference numerals:

[0035] 100. Battery box; 1. Box cover; 10. Cover body; 11. Top plate; 12. Side plate; 12a. First side plate; h1. First height; 13. First chamfer; h2. Second height; 12b. Second side plate; 14. Panel; 15. Second chamfer; 16. Connecting edge; 20. Explosion-proof valve; 2. Liquid-cooled bottom plate; 3. Sealing connector. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0037] As a core energy component, a power battery system (e.g., an energy storage device) is used to provide the energy required to output power to the carrier (e.g., automobile, ship, etc.) in which it is used. A power battery system (e.g., an energy storage device) typically includes a battery box, power components, and some auxiliary components. The battery box has a storage space within which the power components and some auxiliary components are housed. In related technologies, some power battery systems have a large internal space vacancy rate, resulting in a waste of space and hindering the improvement of energy density. Some components that need to be arranged on the outer surface of the battery box protrude from the surface of the battery box, resulting in the need for additional space to avoid these components after the power battery system is installed in a car, ship, or other carrier.

[0038] See also Figure 1 , Figure 1 Schematic diagram of the explosion of the battery box 100 provided in an embodiment of the present application. The present application provides a box cover 1 of a battery box 100, comprising a cover body 10 and an explosion-proof valve 20. The cover body 10 is used to cover the battery components and electrical components and protect the equipment. The cover body 10 can be made of aluminum alloy, stainless steel, magnesium alloy, titanium alloy or any other suitable material according to the applicable environment and working conditions. The cover body 10 may include a top plate 11 and a side plate 12. The side plate 12 is arranged around the top plate 11, and a receiving space is enclosed between the side plate 12 and the top plate 11. A first chamfer 13 is provided at the connection between at least one end of the top plate 11 and the side plate 12. The explosion-proof valve 20 can effectively control and release the internal pressure of the battery box 100, and ensure the safety of the internal equipment and users of the battery box 100. The explosion-proof valve 20 can be set at the first chamfer 13.

[0039] The box cover 1 of the battery box 100 provided in the embodiment of the present application is designed to have a first chamfer 13 at the connection between one end of the top plate 11 and the side plate 12, and the explosion-proof valve 20 is arranged at the first chamfer 13. On the one hand, it can reduce the stress concentration at the connection between the top plate 11 and the side plate 12, improve the structural strength and durability of the connection, and at the same time reduce the space vacancy rate inside the battery box 100, so that the overall structural appearance of the battery box 100 is more compact, and improve the technical problem of the battery box 100 occupying a large space in the related art to adapt to the limited installation space. On the other hand, the angle between the top plate 11 and the side plate 12 is increased to make the part passivated, which can effectively prevent scratches on the human body, improve the safety of use, and enhance the appearance and touch of the product.

[0040] See also Figure 1 and Figure 2 , Figure 2 This is a side view of a battery box 100 provided in an embodiment of the present application. In some embodiments of the present application, the side panel 12 may include a first side panel 12a, which is located on one side of the top panel 11 in the circumferential direction, and the end of the first side panel 12a close to the top panel 11 is connected to the first chamfer 13. Specifically, there may be multiple side panels 12, and multiple side panels 12 are arranged on one side of the top panel 11, each side panel includes two oppositely arranged ends, one end of the side panel is connected to the top panel 11, and the other end of the side panel extends in a direction away from the top panel 11, and multiple side panels are arranged around the edge of the top panel 11 and connected to each other, so that the multiple side panels and the top panel 11 can be enclosed to form a storage space that can accommodate battery components and electrical components. The top panel 11 may include two oppositely arranged ends, and the side panel may include a first side panel 12a, one end of the first side panel 12a is connected to one end of the top panel 11, and the other end of the first side panel 12a extends in a direction away from the top panel 11. In order to reduce stress concentration at the connection between the first side panel 12a and the top panel 11, the connection between the first side panel 12a and the top panel 11 can be chamfered.

[0041] See also Figure 2 and Figure 3 , Figure 3Another side view of the battery box 100 provided in an embodiment of the present application. In some embodiments, the cover 10 further includes a first connecting plate, which is connected between the first side panel 12a and the top panel 11 to form a first chamfer 13. Exemplarily, a straight first connecting plate can be connected between the first side panel 12a and the top panel 11, with opposite sides of the first connecting plate being bent to connect the first side panel 12a and the top panel 11 to form a chamfer at the junction of the first side panel 12a and the top panel 11. The explosion-proof valve 20 is disposed on the side of the connecting plate facing away from the storage space. In the process of implementing the embodiments of the present application, the inventors found through calculations and experiments that when the angle between the first side panel 12a and the first chamfer 13 (or the first connecting plate) is set to be greater than or equal to 100 degrees and less than or equal to 160 degrees, the cover body 10 can have better structural strength, and the space utilization and compactness of the box cover 1 can be effectively improved. For example, the angle between the first side panel 12a and the first chamfer 13 (or the first connecting plate) can be set to any value of 110 degrees, 120 degrees, 130 degrees, and 140 degrees. The present application does not enumerate the selectable angles between the first side panel 12a and the first chamfer 13. As long as the angle is within this range, it can be considered for application. It is understandable that the first chamfer 13 can be formed by bending a part of the top plate 11, or the first chamfer 13 can be formed by bending a part of the first side plate 12a, or the first side plate 12a, the first chamfer 13 and the top plate 11 can be bent and formed as a whole. The appropriate forming method can be selected according to the specific situation, and this application does not make any specific limitation on its specific forming method.

[0042] During the implementation of the present invention, the inventors discovered that, in addition to designing the angle between the first side panel 12a and the first chamfer 13 as described above, other approaches can be used to improve the structural strength of the lid 10. For example, by designing a suitable height ratio between the first side panel 12a and the first chamfer 13, structural strength and space utilization can be improved. Specifically, after calculations and experiments, the inventors determined that, in a direction perpendicular to the top panel 11, the first side panel 12a has a first height h1, and the first chamfer 13 has a second height h2. If the ratio of the first height h1 to the second height h2 is set to be greater than or equal to 0.5 and less than or equal to 14, the lid 10 can achieve good structural strength, thereby improving the space utilization and structural compactness of the box lid 1. For example, the ratio of the first height h1 to the second height h2 can be set to any value among 1, 2.5, 5, 7.5, 10, and 12.5. This application does not provide an exhaustive list of the ratio of the first height h1 to the second height h2; any value within this range is considered suitable. In other words, the ratio of the length of the first side panel 12a to the width of the first chamfer 13 can be set to be greater than or equal to 0.5 and less than or equal to 2.5. For example, the ratio of the length of the first side panel 12a to the width of the first chamfer 13 can be set to any value among 0.75, 1, 1.25, 1.5, 1.75, and 2.25. The present application does not enumerate the numerical values ​​of the ratio of the length of the first side panel 12a to the width of the first chamfer 13. As long as the numerical value is within this range, it can be considered to be applicable. It should be noted that the length of the first side panel 12a is the distance from the edge of the first side panel 12a on one side away from the first chamfer 13 to the first chamfer 13, and the width of the first chamfer 13 is the distance from the edge of the first chamfer 13 on one side close to the top plate 11 to the edge of the other side away from the top plate 11. The cover 10 of the embodiment of the present application can select angle design, height design and / or aspect ratio design as appropriate to improve the structural performance of the cover 10.

[0043] See also Figure 1 and Figure 2 The side panel may further include a second side panel 12b, which is connected to the end of the top panel 11 facing away from the first chamfer 13. The cover 1 may further include a panel 14, which is mounted on the second side panel 12b. The panel 14 may be provided with at least one of an electrical interface, an indicator component, and a human-machine interaction component. For example, the second side panel 12b may be the side panel of the battery box 100 that faces the user during normal use. The panel 14 is mounted on the second side panel 12b to facilitate user operation. To reduce stress concentration between the second side panel 12b and the top panel 11 and improve structural strength, a second chamfer 15 may be provided at the connection between the second side panel 12b and the top panel 11. The second chamfer 15 may be a rounded chamfer.

[0044] Exemplarily, an arc-shaped second connecting plate can be connected between the first side plate 12a and the top plate 11, and the opposite sides of the second connecting plate are connected to the top plate 11 and the second side plate 12b to form a chamfer at the connection between the second side plate 12b and the top plate 11, that is, the top plate 11 and the second side plate 12b are connected by a circular arc surface transition. After calculation and testing, the inventor found that when the radius of the second connecting plate is set between 1mm and 40mm, the connection between the top plate 11 and the second side plate 12b can have better structural strength and structural rigidity. For example, the radius of the second connecting plate (or the second chamfer 15) can be set to any value among 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, and 35mm. The present application does not list all the numerical values ​​of the radius of the second connecting plate. As long as the value is within this range, it can be considered for application. The second connecting plate can also be a straight plate, and the two opposite sides of the second connecting plate are bent to connect the top plate 11 and the second side plate 12b respectively, that is, a chamfer design is made between the top plate 11 and the second side plate 12b.

[0045] See also Figure 4 and Figure 5 , Figure 4 This is a cross-sectional schematic diagram of the cover body 10 provided in an embodiment of the present application. Figure 5 for Figure 4 An enlarged schematic diagram of the middle A portion. In some embodiments of the present application, the cover body 10 may further include a connecting edge 16, the connecting edge 16 being bent and connected to one end of the side panel facing away from the top panel 11, the connecting edge 16 being connected to the outer surface of the side panel and extending in a direction away from the accommodating space, and the connecting edge 16 being provided with a mounting hole, and the mounting hole being used to connect and fix with the bottom plate of the battery box 100. In the embodiments of the present application, the side panel and the connecting edge 16 may be formed as a single piece, for example, the side panel and the connecting edge 16 may be formed by bending, and in other embodiments, the side panel and the connecting edge 16 may also be formed by drawing, and a suitable method may be selected according to the specific situation. It is understandable that the side panel and the connecting edge 16 may also be two components provided separately, and the connecting edge 16 may be welded to the side panel.

[0046] Before connecting the cover body 10 to the bottom plate of the battery box 100, the side of the cover body 10 with the accommodating space can be facing the bottom plate and its connecting edge 16 can be attached to the edge of the bottom plate. The edge of the bottom plate can be provided with multiple through holes corresponding to the connecting holes of the cover body 10 one by one. The multiple connecting holes of the cover body 10 are connected to the multiple through holes of the bottom plate one by one. The connecting parts (such as bolts, screws) are passed through the connecting holes and the through holes, so that the cover body 10 can be fixedly connected to the bottom plate.

[0047] In some embodiments, the ratio of the thickness of the connecting edge 16 to the thickness of the side panel can be set to be greater than 1 and less than or equal to 4. For example, the ratio of the thickness of the connecting edge 16 to the thickness of the side panel can be set to any value among 1.25, 1.5, 1.75, 2, 2.25, 2.5, 2.75, 3, 3.25, 3.5, and 3.75. The present application does not list all the values ​​for the ratio of the thickness of the connecting edge 16 to the thickness of the side panel. As long as the value is within this range, it can be considered for application. In the embodiment of the present application, by thickening the connecting edge 16 used to connect the cover 10 to the bottom panel, the connection strength between the cover 10 and the bottom panel is effectively improved without significantly increasing the weight of the cover 10, the degree of deformation when the connecting edge 16 is connected to the bottom panel is reduced, the connection between the connecting edge 16 and the bottom panel is made tighter, and the infiltration of external liquid from between the connecting edge 16 and the bottom panel is effectively reduced, thereby improving the sealing level of the battery box 100. The thickness of the connecting edge 16 provided in the embodiment of the present application can be greater than 1 mm and less than or equal to 4 mm. For example, the thickness of the connecting edge 16 can be any value among 1.25, 1.5, 1.75, 2, 2.25, 2.5, 2.75, 3, 3.25, 3.5, and 3.75. The present application does not enumerate the values ​​of the thickness of the connecting edge 16. Such a design can improve at least some of the mechanical properties of the box cover 1, such as improving its structural stiffness and structural strength.

[0048] See also Figure 1 The present application provides a battery box 100, which includes a box cover 1 according to any embodiment of the present application and a liquid cooling base plate 2. The liquid cooling base plate 2 is sealed to the box cover 1 to form a closed storage space. The liquid cooling base plate 2 contains a liquid cooling medium that can flow and is used to cool or heat the battery pack within the battery box 100.

[0049] In the battery box 100 provided in the embodiment of the present application, in the embodiment where the cover 10 further includes a connecting edge 16, the ratio of the thickness of the connecting edge 16 to the thickness of the side plate is set to be greater than 1 and less than or equal to 4. The battery box 100 may also include a sealing connector 3, which is provided between the liquid-cooled bottom plate 2 and the connecting edge 16 to seal the accommodation space. The sealing connector 3 can be a gasket, sealing ring, or sealant commonly used in the industry. The specific selection can be based on the use scenario of the battery box 100 and the applied working conditions. The use of the sealing connector 3 between the cover 10 and the liquid-cooled plate can prevent liquid in the environment outside the battery box 100 from seeping into the gap between the cover 10 and the liquid-cooled plate, thereby improving the sealing level of the battery box 100 and making the battery box 100 suitable for special environments and working conditions. For example, for a marine battery box 100, it helps to ensure its working performance in a high humidity environment. The embodiment of the present application can effectively alleviate the situation where the connecting edge 16 is easily deformed when the cover body 10 is connected to the liquid-cooling base plate 2 by thickening the connecting edge 16, effectively improve the connection strength between the cover body 10 and the liquid-cooling base plate 2 while meeting the lightweight design of the battery box 100, reduce the contact of the sealing connection 3 with the air, slow down its oxidation rate, and increase the service life of the battery box 100.

[0050] The present application also provides an energy storage device, which may include a battery pack (not shown) and a battery box 100 according to any embodiment of the present application, wherein the battery pack is disposed in the accommodation space of the battery box 100 .

[0051] In summary, the beneficial effects of the box cover, battery box and energy storage device provided by the embodiments of the present application are: first, by designing the connection between one end of the top plate and the side plate as a first chamfer, and the explosion-proof valve is arranged at the first chamfer, the stress concentration at the connection between the top plate and the side plate can be reduced, the structural strength and durability of the connection can be improved, the safety of use can be improved, the appearance and touch of the product can be improved, and the space utilization rate of the product can be improved; second, by providing a second chamfer at the connection between the second side plate and the top plate, the second chamfer is a rounded chamfer, which is conducive to increasing the stress concentration between the second side plate and the top plate and improving the structural strength; third, by setting the ratio of the thickness of the connecting edge to the thickness of the side plate to be greater than 1 and less than or equal to 4, the connection strength between the cover body and the bottom plate is effectively improved without significantly increasing the weight of the cover body, the degree of deformation when the connecting edge is connected to the bottom plate is reduced, the connection between the connecting edge and the bottom plate is made tighter, and the infiltration of external liquid from between the connecting edge and the bottom plate is effectively reduced, thereby improving the sealing level of the battery box.

[0052] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been described in this article by applying specific examples, the above embodiment explanation is only for helping understanding the method and its core thought of the utility model; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A box cover, characterized in that: include: The cover body includes a top plate and side plates, wherein the side plates are arranged around the top plate. An accommodating space is formed between the side panels and the top panel, and a first chamfer is provided at a connection between at least one end of the top panel and the side panels; and An explosion-proof valve is arranged at the first chamfer.

2. The box cover according to claim 1, characterized in that: The side panel includes a first side panel, which is located on one side of the top panel in the circumferential direction; the cover body also includes a first connecting plate, which is connected between the first side panel and the top panel to form the first chamfer, and the angle between the first side panel and the first chamfer is greater than or equal to 100° and less than or equal to 160°.

3. The box cover according to claim 2, characterized in that: In a direction perpendicular to the top plate, the first side plate has a first height, and the first chamfer has a second height. A ratio of the first height to the second height is greater than or equal to 0.5 and less than or equal to 14.

4. The box cover according to any one of claims 1 to 3, characterized in that: The side plate further includes a second side plate connected to an end of the top plate facing away from the first chamfer; The box cover further comprises a panel, which is mounted on the second side panel and is provided with at least one of an electrical interface, an indicating component and a human-computer interaction component.

5. The box cover according to claim 4, characterized in that: A second chamfer is provided at a connection between the second side plate and the top plate, and the second chamfer is a rounded chamfer.

6. The box cover according to claim 5, characterized in that: The radius of the second chamfer is between 1 mm and 40 mm.

7. The box cover according to any one of claims 1 to 3, characterized in that: The cover body also includes a connecting edge, which is bent and connected to one end of the side panel facing away from the top panel. The connecting edge is connected to the outer surface of the side panel and extends in a direction away from the accommodating space. The connecting edge is provided with a mounting hole, which is used to connect and fix to the bottom plate of the battery box.

8. The box cover according to claim 7, characterized in that: The ratio of the thickness of the connecting edge to the thickness of the side panel is greater than 1 and less than or equal to 4; and / or The thickness of the connecting edge is greater than 1 mm and less than or equal to 4 mm.

9. The box cover according to claim 7, characterized in that: The side panels and the connecting edges are integrally formed; or The connecting edge is welded to the side plate.

10. A battery box, characterized in that: include: The box cover according to any one of claims 1 to 9; as well as The liquid cooling base plate is sealed and connected to the box cover to close the accommodating space.

11. The battery box according to claim 10, characterized in that: When the cover further includes a connecting edge, the battery box further includes a sealing connector, and the sealing connector is provided between the liquid-cooling bottom plate and the connecting edge to seal the accommodating space.

12. An energy storage device, characterized in that: include: The battery box according to claim 10 or 11; as well as A battery pack is arranged in the accommodating space.

Images